JP2015203315A - Heat insulating tool for cylinder bore wall, internal combustion engine, and automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an internal combustion engine of which a cylinder bore wall has a highly uniform wall temperature.SOLUTION: A heat insulating tool for the cylinder bore wall is installed in the middle lower part of a grooved cooling water flow path of a cylinder block of the internal combustion engine for heat insulation of part of a bore wall of all cylinder bores. It includes a heat insulating rubber member for contacting the wall face of one cylinder bore out of all wall faces on the cylinder bore side of the middle lower part of the grooved cooling water flow path or the wall face extending over two or more cylinder bores, a metal substrate member to which the heat insulating rubber member is fixed, and energizing and back side flow suppressing members fixed to the back side of the metal substrate member for energizing the metal substrate member to push the heat insulating rubber member against the wall face on the cylinder bore side of the middle lower part of the grooved cooling water flow path and suppressing the flow of cooling water between the metal substrate member and the wall face on the opposite side to the wall face on the cylinder bore side of the middle lower part of the grooved cooling water flow path, one or more energizing and back side flow suppressing members being attached to each bore part of the metal substrate member.

Description

本発明は、内燃機関のシリンダブロックのシリンダボア壁の溝状冷却水流路側の壁面に接触させて配置される保温具及びそれを備える内燃機関並びに該内燃機関を有する自動車に関する。   The present invention relates to a heat retaining device disposed in contact with a wall surface on the grooved coolant flow path side of a cylinder bore wall of a cylinder block of an internal combustion engine, an internal combustion engine including the same, and an automobile having the internal combustion engine.

内燃機関では、ボア内のピストンの上死点で燃料の爆発が起こり、その爆発によりピストンが押し下げられるという構造上、シリンダボア壁の上側は温度が高くなり、下側は温度が低くなる。そのため、シリンダボア壁の上側と下側では、熱変形量に違いが生じ、上側は大きく膨張し、一方、下側の膨張が小さくなる。   In the internal combustion engine, fuel explosion occurs at the top dead center of the piston in the bore, and the piston is pushed down by the explosion, so that the temperature is high on the upper side of the cylinder bore wall and the temperature is lower on the lower side. Therefore, there is a difference in the amount of thermal deformation between the upper side and the lower side of the cylinder bore wall, and the upper side expands greatly, while the lower side expansion decreases.

その結果、ピストンのシリンダボア壁との摩擦抵抗が大きくなり、これが、燃費を下げる要因となっているので、シリンダボア壁の上側と下側とで熱変形量の違いを少なくすることが求められている。   As a result, the frictional resistance with the cylinder bore wall of the piston increases, and this is a factor that lowers fuel consumption. Therefore, it is required to reduce the difference in thermal deformation between the upper side and the lower side of the cylinder bore wall. .

そこで、従来より、シリンダボア壁の壁温を均一にするために、溝状冷却水流路内にスペーサーを設置し、溝状冷却水流路内の冷却水の水流を調節して、冷却水によるシリンダボア壁の上側の冷却効率と及び下側の冷却効率を制御することが試みられてきた。例えば、特許文献１には、内燃機関のシリンダブロックに形成された溝状冷却用熱媒体流路内に配置されることで溝状冷却用熱媒体流路内を複数の流路に区画する流路区画部材であって、前記溝状冷却用熱媒体流路の深さに満たない高さに形成され、前記溝状冷却用熱媒体流路内をボア側流路と反ボア側流路とに分割する壁部となる流路分割部材と、前記流路分割部材から前記溝状冷却用熱媒体流路の開口部方向に向けて形成され、かつ先端縁部が前記溝状冷却用熱媒体流路の一方の内面を越えた形に可撓性材料で形成されていることにより、前記溝状冷却用熱媒体流路内への挿入完了後は自身の撓み復元力により前記先端縁部が前記内面に対して前記溝状冷却用熱媒体流路の深さ方向の中間位置にて接触することで前記ボア側流路と前記反ボア側流路とを分離する可撓性リップ部材と、を備えたことを特徴とする内燃機関冷却用熱媒体流路区画部材が開示されている。   Therefore, conventionally, in order to make the wall temperature of the cylinder bore wall uniform, a spacer is installed in the grooved cooling water flow path, and the flow of the cooling water in the grooved cooling water flow path is adjusted so that the cylinder bore wall caused by the cooling water Attempts have been made to control the cooling efficiency on the upper side and the cooling efficiency on the lower side. For example, Patent Document 1 discloses a flow that divides a groove-shaped cooling heat medium flow path into a plurality of flow paths by being disposed in a groove-shaped cooling heat medium flow path formed in a cylinder block of an internal combustion engine. A channel partition member formed at a height less than a depth of the groove-shaped cooling heat medium flow path, and a bore-side flow path and an anti-bore-side flow path in the groove-shaped cooling heat medium flow path A flow path dividing member serving as a wall portion that is divided into a groove portion, a groove portion that is formed from the flow path dividing member toward the opening of the groove-shaped cooling heat medium flow channel, and a leading edge is the groove-shaped cooling heat medium. By being formed of a flexible material so as to extend beyond one inner surface of the flow path, the end edge portion is caused by its own bending restoring force after completion of insertion into the grooved cooling heat medium flow path. By contacting the inner surface at the intermediate position in the depth direction of the grooved cooling heat medium flow path, A flexible lip member that separates the A-side passage, the internal combustion engine cooling heat medium flow passage partition member comprising the disclosed.

特開２００８−３１９３９号公報（特許請求の範囲）JP 2008-31939 A (Claims)

ところが、引用文献１の内燃機関冷却用熱媒体流路区画部材は、強くシリンダボア壁に押し付けることができないので、エンジンの振動により、溝状冷却水流路内で、動いてしまうという問題があった。   However, the heat medium flow path partition member for cooling the internal combustion engine of the cited document 1 cannot be strongly pressed against the cylinder bore wall, so that there is a problem that it moves in the grooved coolant flow path due to engine vibration.

また、シリンダボア壁の壁温の全てが同じ温度ということはなく、温度差があるため、保温が必要な箇所を選択的に保温する必要がある。しかし、引用文献１の内燃機関冷却用熱媒体流路区画部材では、全てのシリンダボア壁を同様に保温することしかできないという問題があった。   Further, the wall temperatures of the cylinder bore walls are not all the same temperature, and there is a temperature difference, so that it is necessary to selectively keep the portions that need to be kept warm. However, the internal combustion engine cooling heat medium flow path partition member disclosed in Cited Document 1 has a problem that all the cylinder bore walls can only be kept warm.

従って、本発明の課題は、シリンダボア壁のうちの保温が必要な箇所を選択的に保温ができ且つ振動や冷却水の流れによる位置ずれを起こし難いシリンダボア壁の保温具を提供することにある。   Therefore, an object of the present invention is to provide a cylinder bore wall heat insulator that can selectively retain a portion of the cylinder bore wall that needs to be kept warm, and that is less likely to be displaced due to vibration or a flow of cooling water.

上記従来技術における課題は、以下に示す本発明により解決される。すなわち、本発明（１）は、シリンダボアを有する内燃機関のシリンダブロックの溝状冷却水流路の中下部に設置され、全シリンダボアのボア壁のうちの一部のボア壁を保温するためのシリンダボア壁の保温具であり、
溝状冷却水流路の中下部のシリンダボア側の全壁面のうちの１つのシリンダボアの壁面又は２つ以上のシリンダボアに亘る分の壁面に接触する保温用ゴム部材と、該保温用ゴム部材が固定される金属基体部材と、該金属基体部材の背面側に固定され、該溝状冷却水流路の中下部のシリンダボア側の壁面に向かって、該金属基体部材が該保温用ゴム部材を押し付けるように付勢すると共に、該金属基体部材と溝状冷却水流路の中下部のシリンダボア側の壁面とは反対側の壁面との間の冷却水流れを抑制する付勢兼背面側流れ抑制部材と、からなり、
該付勢兼背面側流れ抑制部材が、該金属基体部材の各ボア部毎に、１つ以上付設されていること、
を特徴するシリンダボア壁の保温具を提供するものである。 The problems in the above prior art are solved by the present invention described below. That is, the present invention (1) is a cylinder bore wall that is installed in the middle and lower part of a groove-like cooling water flow path of a cylinder block of an internal combustion engine having a cylinder bore and keeps a part of the bore walls of all the cylinder bores. The warmer of the
A heat retaining rubber member that is in contact with the wall surface of one cylinder bore or two or more cylinder bores among all the wall surfaces on the cylinder bore side in the middle and lower part of the grooved cooling water flow path, and the heat retaining rubber member are fixed A metal base member that is fixed to the back side of the metal base member, and is attached so that the metal base member presses the heat retaining rubber member toward the wall surface on the cylinder bore side in the lower part of the grooved cooling water flow path. And a biasing and back side flow suppressing member that suppresses cooling water flow between the metal base member and the wall surface on the opposite side to the wall surface on the cylinder bore side in the middle and lower part of the grooved cooling water flow path. ,
One or more of the biasing and back side flow suppressing members are provided for each bore portion of the metal base member;
A cylinder bore wall heat insulator characterized by the above is provided.

また、本発明（２）は、４つ以上のシリンダボアを有する内燃機関のシリンダブロックの溝状冷却水流路の中下部に設置され、全シリンダボアのボア壁のうちの一部のボア壁を保温するためのシリンダボア壁の保温具であり、
溝状冷却水流路の中下部のシリンダボア側の全壁面のうちの２つ又は３つのシリンダボアに亘る分の壁面に接触する保温用ゴム部材と、該保温用ゴム部材が固定される金属基体部材と、該金属基体部材の背面側に固定され、該溝状冷却水流路の中下部のシリンダボア側の壁面に向かって、該金属基体部材が該保温用ゴム部材を押し付けるように付勢すると共に、該金属基体部材と溝状冷却水流路の中下部のシリンダボア側の壁面とは反対側の壁面との間の冷却水流れを抑制する付勢兼背面側流れ抑制部材と、からなり、
該付勢兼背面側流れ抑制部材が、該金属基体部材の各ボア部毎に、１つ以上付設されていること、
を特徴する（１）のシリンダボア壁の保温具を提供するものである。 Further, the present invention (2) is installed in the middle and lower part of the groove-like cooling water flow path of the cylinder block of the internal combustion engine having four or more cylinder bores, and keeps a part of the bore walls of all the cylinder bores. A cylinder bore wall heat insulator for
A heat insulating rubber member that contacts two or three cylinder bores of the entire wall surface on the cylinder bore side in the middle and lower part of the grooved cooling water flow path, and a metal base member to which the heat insulating rubber member is fixed The metal base member is fixed to the back side of the metal base member, and urges the metal base member to press the heat insulating rubber member toward the wall surface on the cylinder bore side in the lower part of the grooved cooling water flow path, An urging and back side flow suppressing member that suppresses the flow of cooling water between the metal base member and the wall surface on the opposite side to the wall surface on the cylinder bore side in the middle and lower part of the grooved cooling water flow path,
One or more of the biasing and back side flow suppressing members are provided for each bore portion of the metal base member;
(1) A cylinder bore wall heat insulator characterized by the above.

また、本発明（３）は、３つのシリンダボアを有する内燃機関のシリンダブロックの溝状冷却水流路の中下部に設置され、全シリンダボアのボア壁のうちの一部のボア壁を保温するためのシリンダボア壁の保温具であり、
溝状冷却水流路の中下部のシリンダボア側の全壁面のうちの２つのシリンダボアに亘る分の壁面に接触する保温用ゴム部材と、該保温用ゴム部材が固定される金属基体部材と、該金属基体部材の背面側に固定され、該溝状冷却水流路の中下部のシリンダボア側の壁面に向かって、該金属基体部材が該保温用ゴム部材を押し付けるように付勢すると共に、該金属基体部材と溝状冷却水流路の中下部のシリンダボア側の壁面とは反対側の壁面との間の冷却水流れを抑制する付勢兼背面側流れ抑制部材と、からなり、
該付勢兼背面側流れ抑制部材が、該金属基体部材の各ボア部毎に、１つ以上付設されていること、
を特徴する（１）のシリンダボア壁の保温具を提供するものである。 Further, the present invention (3) is installed in the middle and lower part of the groove-like cooling water flow path of the cylinder block of the internal combustion engine having three cylinder bores, and keeps a part of the bore walls among the bore walls of all the cylinder bores. Cylinder bore wall insulation,
A heat insulating rubber member that contacts two cylinder bores of all wall surfaces on the cylinder bore side in the middle and lower part of the grooved cooling water flow path, a metal base member to which the heat insulating rubber member is fixed, and the metal The metal base member is fixed to the back surface side of the base member member, and urges the metal base member member to press the heat retaining rubber member toward the wall surface on the cylinder bore side in the lower part of the grooved cooling water flow path. And a biasing and back side flow suppressing member that suppresses the cooling water flow between the wall surface on the opposite side to the wall surface on the cylinder bore side in the middle and lower part of the grooved cooling water flow path,
One or more of the biasing and back side flow suppressing members are provided for each bore portion of the metal base member;
(1) A cylinder bore wall heat insulator characterized by the above.

また、本発明（４）は、２つ以上のシリンダボアを有する内燃機関のシリンダブロックの溝状冷却水流路の中下部に設置され、全シリンダボアのボア壁のうちの一部のボア壁を保温するためのシリンダボア壁の保温具であり、
溝状冷却水流路の中下部のシリンダボア側の全壁面のうちの１つのシリンダボアの壁面に接触する保温用ゴム部材と、該保温用ゴム部材が固定される金属基体部材と、該金属基体部材の背面側に固定され、該溝状冷却水流路の中下部のシリンダボア側の壁面に向かって、該金属基体部材が該保温用ゴム部材を押し付けるように付勢すると共に、該金属基体部材と溝状冷却水流路の中下部のシリンダボア側の壁面とは反対側の壁面との間の冷却水流れを抑制する付勢兼背面側流れ抑制部材と、からなり、
該付勢兼背面側流れ抑制部材が、該金属基体部材の各ボア部毎に、１つ以上付設されていること、
を特徴する（１）のシリンダボア壁の保温具を提供するものである。 Moreover, this invention (4) is installed in the center lower part of the groove-shaped cooling water flow path of the cylinder block of the internal combustion engine which has two or more cylinder bores, and heats the one part bore wall of the bore walls of all the cylinder bores. A cylinder bore wall heat insulator for
A heat insulating rubber member that is in contact with the wall surface of one of the cylinder bores on the cylinder bore side in the middle and lower part of the grooved cooling water flow path; a metal base member to which the heat insulating rubber member is fixed; The metal base member is fixed to the rear surface and urged toward the wall surface on the cylinder bore side in the lower part of the groove-like cooling water flow path so as to press the heat retaining rubber member. An urging and back side flow suppressing member for suppressing the flow of cooling water between the wall surface on the opposite side of the cylinder bore side wall in the lower part of the cooling water flow path,
One or more of the biasing and back side flow suppressing members are provided for each bore portion of the metal base member;
(1) A cylinder bore wall heat insulator characterized by the above.

また、本発明（５）は、シリンダボアを有する内燃機関のシリンダブロックの溝状冷却水流路の中下部に設置され、全シリンダボアのボア壁のうちの一部のボア壁を保温するためのシリンダボア壁の保温具であり、
溝状冷却水流路の中下部のシリンダボア側の全壁面のうちの１つのシリンダボアの壁面又は２つ以上のシリンダボアに亘る分の壁面に接触する保温用ゴム部材と、該保温用ゴム部材が固定される金属基体部材と、該金属基体部材の背面側に固定され、該溝状冷却水流路の中下部のシリンダボア側の壁面に向かって、該金属基体部材が該保温用ゴム部材を押し付けるように付勢する付勢部材と、該金属基体部材の背面側に固定され、該金属基体部材と溝状冷却水流路の中下部のシリンダボア側の壁面とは反対側の壁面との間の冷却水流れを抑制する背面側流れ抑制部材と、からなり、
該付勢部材が、該金属基体部材の各ボア部毎に、１つ以上付設されており、
該背面側流れ抑制部材が、１つ以上付設されていること、
を特徴するシリンダボア壁の保温具を提供するものである。 Further, the present invention (5) is a cylinder bore wall that is installed in the middle and lower part of the groove-like cooling water flow path of the cylinder block of the internal combustion engine having the cylinder bore and keeps a part of the bore walls of all the cylinder bores. The warmer of the
A heat retaining rubber member that is in contact with the wall surface of one cylinder bore or two or more cylinder bores among all the wall surfaces on the cylinder bore side in the middle and lower part of the grooved cooling water flow path, and the heat retaining rubber member are fixed A metal base member that is fixed to the back side of the metal base member, and is attached so that the metal base member presses the heat retaining rubber member toward the wall surface on the cylinder bore side in the lower part of the grooved cooling water flow path. A biasing member that is energized and a cooling water flow fixed between the metal base member and the wall surface on the opposite side of the wall surface on the cylinder bore side in the lower part of the groove-like cooling water flow path. A back side flow suppressing member for suppressing,
One or more of the urging members are attached to each bore portion of the metal base member,
That one or more back side flow restraining members are attached;
A cylinder bore wall heat insulator characterized by the above is provided.

また、本発明（６）は、４つ以上のシリンダボアを有する内燃機関のシリンダブロックの溝状冷却水流路の中下部に設置され、全シリンダボアのボア壁のうちの一部のボア壁を保温するためのシリンダボア壁の保温具であり、
溝状冷却水流路の中下部のシリンダボア側の全壁面のうちの２つ又は３つのシリンダボアに亘る分の壁面に接触する保温用ゴム部材と、該保温用ゴム部材が固定される金属基体部材と、該金属基体部材の背面側に固定され、該溝状冷却水流路の中下部のシリンダボア側の壁面に向かって、該金属基体部材が該保温用ゴム部材を押し付けるように付勢する付勢部材と、該金属基体部材の背面側に固定され、該金属基体部材と溝状冷却水流路の中下部のシリンダボア側の壁面とは反対側の壁面との間の冷却水流れを抑制する背面側流れ抑制部材と、からなり、
該付勢部材が、該金属基体部材の各ボア部毎に、１つ以上付設されており、
該背面側流れ抑制部材が、１つ以上付設されていること、
を特徴する（５）のシリンダボア壁の保温具を提供するものである。 Moreover, this invention (6) is installed in the center lower part of the groove-shaped cooling water flow path of the cylinder block of the internal combustion engine which has four or more cylinder bores, and heats one part bore wall among the bore walls of all the cylinder bores. A cylinder bore wall heat insulator for
A heat insulating rubber member that contacts two or three cylinder bores of the entire wall surface on the cylinder bore side in the middle and lower part of the grooved cooling water flow path, and a metal base member to which the heat insulating rubber member is fixed A biasing member fixed to the back side of the metal base member and biasing the metal base member so as to press the heat retaining rubber member toward the wall surface on the cylinder bore side in the lower part of the grooved cooling water flow path And a back side flow that is fixed to the back side of the metal base member and suppresses the flow of cooling water between the metal base member and the wall surface on the opposite side of the wall surface on the cylinder bore side in the middle of the grooved cooling water flow path A restraining member,
One or more of the urging members are attached to each bore portion of the metal base member,
That one or more back side flow restraining members are attached;
(5) A cylinder bore wall heat insulator characterized by the above.

また、本発明（７）は、３つのシリンダボアを有する内燃機関のシリンダブロックの溝状冷却水流路の中下部に設置され、全シリンダボアのボア壁のうちの一部のボア壁を保温するためのシリンダボア壁の保温具であり、
溝状冷却水流路の中下部のシリンダボア側の全壁面のうちの２つのシリンダボアに亘る分の壁面に接触する保温用ゴム部材と、該保温用ゴム部材が固定される金属基体部材と、該金属基体部材の背面側に固定され、該溝状冷却水流路の中下部のシリンダボア側の壁面に向かって、該金属基体部材が該保温用ゴム部材を押し付けるように付勢する付勢部材と、該金属基体部材の背面側に固定され、該金属基体部材と溝状冷却水流路の中下部のシリンダボア側の壁面とは反対側の壁面との間の冷却水流れを抑制する背面側流れ抑制部材と、からなり、
該付勢部材が、該金属基体部材の各ボア部毎に、１つ以上付設されており、
該背面側流れ抑制部材が、１つ以上付設されていること、
を特徴する（５）のシリンダボア壁の保温具を提供するものである。 Moreover, this invention (7) is installed in the center lower part of the groove-shaped cooling water flow path of the cylinder block of the internal combustion engine which has three cylinder bores, and keeps the one part bore wall among the bore walls of all the cylinder bores. Cylinder bore wall insulation,
A heat insulating rubber member that contacts two cylinder bores of all wall surfaces on the cylinder bore side in the middle and lower part of the grooved cooling water flow path, a metal base member to which the heat insulating rubber member is fixed, and the metal An urging member fixed to the back surface side of the base member and urged so that the metal base member presses the heat retaining rubber member toward the wall surface on the cylinder bore side in the lower part of the grooved cooling water flow path; A back side flow restraining member fixed to the back side of the metal base member and restraining a coolant flow between the metal base member and the wall surface on the opposite side of the wall surface on the cylinder bore side in the middle and lower part of the grooved cooling water flow path; Consists of
One or more of the urging members are attached to each bore portion of the metal base member,
That one or more back side flow restraining members are attached;
(5) A cylinder bore wall heat insulator characterized by the above.

また、本発明（８）は、２つ以上のシリンダボアを有する内燃機関のシリンダブロックの溝状冷却水流路の中下部に設置され、全シリンダボアのボア壁のうちの一部のボア壁を保温するためのシリンダボア壁の保温具であり、
溝状冷却水流路の中下部のシリンダボア側の全壁面のうちの１つのシリンダボアの壁面に接触する保温用ゴム部材と、該保温用ゴム部材が固定される金属基体部材と、該金属基体部材の背面側に固定され、該溝状冷却水流路の中下部のシリンダボア側の壁面に向かって、該金属基体部材が該保温用ゴム部材を押し付けるように付勢する付勢部材と、該金属基体部材の背面側に固定され、該金属基体部材と溝状冷却水流路の中下部のシリンダボア側の壁面とは反対側の壁面との間の冷却水流れを抑制する背面側流れ抑制部材と、からなり、
該付勢部材が、該金属基体部材の各ボア部毎に、１つ以上付設されており、
該背面側流れ抑制部材が、１つ以上付設されていること、
を特徴する（５）シリンダボア壁の保温具を提供するものである。 Moreover, this invention (8) is installed in the center lower part of the groove-shaped cooling water flow path of the cylinder block of the internal combustion engine which has two or more cylinder bores, and heats one part bore wall among the bore walls of all the cylinder bores. A cylinder bore wall heat insulator for
A heat insulating rubber member that is in contact with the wall surface of one of the cylinder bores on the cylinder bore side in the middle and lower part of the grooved cooling water flow path; a metal base member to which the heat insulating rubber member is fixed; An urging member fixed to the back surface and urged so that the metal base member presses the heat retaining rubber member toward the wall surface on the cylinder bore side in the lower part of the groove-like cooling water flow path; and the metal base member A back side flow restraining member that restrains the coolant flow between the metal base member and the wall surface on the opposite side of the wall surface on the cylinder bore side in the middle and lower part of the groove-like cooling water flow path. ,
One or more of the urging members are attached to each bore portion of the metal base member,
That one or more back side flow restraining members are attached;
(5) A warmer for a cylinder bore wall is provided.

また、本発明（９）は、（１）〜（８）いずれかのシリンダボア壁の保温具が設置されていることを特徴とする内燃機関を提供するものである。   In addition, the present invention (9) provides an internal combustion engine characterized in that a heat insulator for the cylinder bore wall according to any one of (1) to (8) is installed.

また、本発明（１０）は、（９）の内燃機関を有することを特徴とする自動車を提供するものである。   Moreover, this invention (10) provides the motor vehicle characterized by having the internal combustion engine of (9).

本発明によれば、シリンダボア壁のうちの保温が必要な箇所を選択的に保温ができ且つ振動や冷却水の流れによる位置ずれを起こし難いシリンダボア壁の保温具を提供することができる。   ADVANTAGE OF THE INVENTION According to this invention, the location which needs heat insulation among cylinder bore walls can be selectively warmed, and the warmer of the cylinder bore wall which cannot raise | generate position shift by the flow of a vibration or a cooling water can be provided.

本発明のシリンダボア壁の保温具が設置されるシリンダブロックの形態例を示す模式的な平面図である。It is a typical top view which shows the form example of the cylinder block in which the heat insulating tool of the cylinder bore wall of this invention is installed. 図１のｘ−ｘ線断面図である。It is the xx sectional view taken on the line of FIG. 図１に示すシリンダブロックの斜視図である。It is a perspective view of the cylinder block shown in FIG. 本発明のシリンダボア壁の保温具の形態例を示す模式的な斜視図である。It is a typical perspective view which shows the form example of the heat insulating tool of the cylinder bore wall of this invention. 図４に示すシリンダボア壁の保温具を上側から見た平面図である。It is the top view which looked at the heat insulating tool of the cylinder bore wall shown in FIG. 4 from the upper side. 図４に示すシリンダボア壁の保温具を保温用ゴム部材側から見た側面図である。It is the side view which looked at the heat insulating tool of the cylinder bore wall shown in FIG. 4 from the heat insulation rubber member side. 図４に示すシリンダボア壁の保温具を付勢兼背面側流れ抑制部材側から見た側面図である。It is the side view which looked at the thermal insulation of the cylinder bore wall shown in FIG. 4 from the urging | biasing and back side flow suppression member side. 図１に示すシリンダブロック１１に、シリンダボア壁の保温具２０を設置する様子を示す模式図である。It is a schematic diagram which shows a mode that the thermal insulation 20 of a cylinder bore wall is installed in the cylinder block 11 shown in FIG. 図１に示すシリンダブロック１１に、シリンダボア壁の保温具２０が設置されている様子を示す模式図である。It is a schematic diagram which shows a mode that the warmer 20 of a cylinder bore wall is installed in the cylinder block 11 shown in FIG. 図９のｘ−ｘ線で切ったときの端面図である。FIG. 10 is an end view taken along line xx in FIG. 9. シリンダボア壁の保温具の製造方法の形態例を示す模式図である。It is a schematic diagram which shows the example of the form of the manufacturing method of the warmer of a cylinder bore wall. シリンダボア壁の保温具の製造方法の形態例を示す模式図である。It is a schematic diagram which shows the example of the form of the manufacturing method of the warmer of a cylinder bore wall. シリンダボア壁の保温具の製造方法の形態例を示す模式図である。It is a schematic diagram which shows the example of the form of the manufacturing method of the warmer of a cylinder bore wall. シリンダボア壁の保温具の製造方法の形態例を示す模式図である。It is a schematic diagram which shows the example of the form of the manufacturing method of the warmer of a cylinder bore wall. シリンダボア壁の保温具の製造方法の形態例を示す模式図である。It is a schematic diagram which shows the example of the form of the manufacturing method of the warmer of a cylinder bore wall. 本発明のシリンダボア壁の保温具の他の形態例を示す模式図である。It is a schematic diagram which shows the other example of a thermal insulation of the cylinder bore wall of this invention. 本発明のシリンダボア壁の保温具の他の形態例を示す模式図である。It is a schematic diagram which shows the other example of a thermal insulation of the cylinder bore wall of this invention. 本発明のシリンダボア壁の保温具の他の形態例を示す模式図である。It is a schematic diagram which shows the other example of a thermal insulation of the cylinder bore wall of this invention. 図１に示すシリンダブロック１１に、シリンダボア壁の保温具３０が設置されている様子を示す模式図である。It is a schematic diagram which shows a mode that the warmer 30 of a cylinder bore wall is installed in the cylinder block 11 shown in FIG. 図１に示すシリンダブロック１１に、シリンダボア壁の保温具３１が設置されている様子を示す模式図である。It is a schematic diagram which shows a mode that the warmer 31 of the cylinder bore wall is installed in the cylinder block 11 shown in FIG. 付勢部材の付設方法の他の形態例を示す模式図である。It is a schematic diagram which shows the other example of an installation method of the urging | biasing member.

本発明のシリンダボア壁の保温具及び本発明の内燃機関について、図１〜図１０を参照して説明する。図１〜図３は、本発明のシリンダボア壁の保温具が設置されるシリンダブロックの形態例を示すものであり、図１は、本発明のシリンダボア壁の保温具が設置されるシリンダブロックを示す模式的な平面図であり、図２は、図１のｘ−ｘ線断面図であり、図３は、図１に示すシリンダブロックの斜視図である。図４〜図７は、本発明のシリンダボア壁の保温具の形態例を示すものであり、図４は、本発明のシリンダボア壁の保温具の形態例を示す模式的な斜視図であり、図４（Ａ）は、保温用ゴム部材側から見た斜視図であり、図４（Ｂ）は、付勢兼背面側流れ抑制部材側から見た斜視図であり、図５は、図４に示すシリンダボア壁の保温具を上側から見た平面図であり、図６は、図４に示すシリンダボア壁の保温具を保温用ゴム部材側から見た側面図であり、図７は、図４に示すシリンダボア壁の保温具を付勢兼背面側流れ抑制部材側から見た側面図である。図８は、図１に示すシリンダブロック１１に、シリンダボア壁の保温具２０を設置する様子を示す模式図であり、図９は、図１に示すシリンダブロック１１に、シリンダボア壁の保温具２０が設置されている様子を示す模式図であり、図１０は、図９のｘ−ｘ線で切ったときの端面図である。   A heat retaining device for a cylinder bore wall according to the present invention and an internal combustion engine according to the present invention will be described with reference to FIGS. 1 to 3 show an example of a cylinder block in which a cylinder bore wall heat insulator of the present invention is installed, and FIG. 1 shows a cylinder block in which a cylinder bore wall heat insulator of the present invention is installed. FIG. 2 is a schematic plan view, FIG. 2 is a sectional view taken along line xx of FIG. 1, and FIG. 3 is a perspective view of the cylinder block shown in FIG. 4 to 7 show an example of the shape of the cylinder bore wall heat insulator of the present invention, and FIG. 4 is a schematic perspective view showing an example of the shape of the cylinder bore wall heat retainer of the present invention. 4 (A) is a perspective view seen from the heat retaining rubber member side, FIG. 4 (B) is a perspective view seen from the urging and back side flow suppressing member side, and FIG. FIG. 6 is a side view of the cylinder bore wall heat insulator shown in FIG. 4 viewed from the heat insulating rubber member side, and FIG. 7 is a side view of the cylinder bore wall heat insulator shown in FIG. It is the side view which looked at the thermal insulation of the cylinder bore wall shown from the urging | biasing and back side flow suppression member side. FIG. 8 is a schematic view showing a state in which the cylinder bore wall heat insulator 20 is installed in the cylinder block 11 shown in FIG. 1, and FIG. 9 is a view showing that the cylinder bore wall heat insulator 20 is attached to the cylinder block 11 shown in FIG. It is a schematic diagram which shows a mode that it has installed, FIG. 10: is an end elevation when it cuts by the xx line | wire of FIG.

図１〜図３に示すように、シリンダボア壁の保温具が設置される車両搭載用内燃機関のオープンデッキ型のシリンダブロック１１には、ピストンが上下するためのボア１２、及び冷却水を流すための溝状冷却水流路１４が形成されている。そして、ボア１２と溝状冷却水流路１４とを区切る壁が、シリンダボア壁１３である。また、シリンダブロック１１には、溝状冷却水流路１１へ冷却水を供給するための冷却水供給口１５及び冷却水を溝状冷却水流路１１から排出するための冷却水排出口１６が形成されている。   As shown in FIGS. 1 to 3, a bore 12 for moving a piston up and down and a cooling water flow through an open deck type cylinder block 11 of a vehicle-mounted internal combustion engine in which a heat insulator for a cylinder bore wall is installed. The groove-shaped cooling water flow path 14 is formed. A wall that separates the bore 12 and the grooved coolant flow path 14 is a cylinder bore wall 13. Further, the cylinder block 11 is formed with a cooling water supply port 15 for supplying cooling water to the grooved cooling water flow channel 11 and a cooling water discharge port 16 for discharging cooling water from the grooved cooling water flow channel 11. ing.

このシリンダブロック１１には、２つ以上のボア１２が直列に並ぶように形成されている。そのため、ボア１２には、１つのボアに隣り合っている端ボア１２ａ１、１２ａ２と、２つのボアに挟まれている中間ボア１２ｂ１、１２ｂ２とがある（なお、シリンダブロックのボアの数が２つの場合は、端ボアのみである。）。直列に並んだボアのうち、端ボア１２ａ１、１２ａ２は両端のボアであり、また、中間ボア１２ｂ１、１２ｂ２は、一端の端ボア１２ａ１と他端の端ボア１２ａ２の間にあるボアである。   The cylinder block 11 is formed with two or more bores 12 arranged in series. Therefore, the bore 12 has end bores 12a1 and 12a2 adjacent to one bore and intermediate bores 12b1 and 12b2 sandwiched between the two bores (note that the number of bores in the cylinder block is two). In the case, only the end bore.) Of the bores arranged in series, the end bores 12a1 and 12a2 are bores at both ends, and the intermediate bores 12b1 and 12b2 are bores between the end bore 12a1 at one end and the end bore 12a2 at the other end.

また、本発明では、溝状冷却水流路１４の壁面のうち、シリンダボア１３側の壁面を、溝状冷却水流路のシリンダボア側の壁面１７と記載し、溝状冷却水流路１４の壁面のうち、溝状冷却水流路のシリンダボア側の壁面１７とは反対側の壁面を壁面１８と記載する。   In the present invention, among the wall surfaces of the grooved cooling water flow path 14, the wall surface on the cylinder bore 13 side is described as the wall surface 17 on the cylinder bore side of the grooved cooling water flow path, and among the wall surfaces of the grooved cooling water flow path 14, A wall surface on the opposite side of the wall surface 17 on the cylinder bore side of the groove-shaped cooling water passage is referred to as a wall surface 18.

図４〜図７に示すシリンダボア壁の保温具２０は、金属基体部材２１と、保温用ゴム部材２２と、背面側ゴム部材２３と、からなる。   The cylinder bore wall heat retaining device 20 shown in FIGS. 4 to 7 includes a metal base member 21, a heat retaining rubber member 22, and a back side rubber member 23.

保温用ゴム部材２２は、上から見たときに、２つの円弧が連続する形状に成形されており、保温用ゴム部材２２の接触面２５側の形状は、溝状冷却水流路１４の中下部のシリンダボア側の壁面に沿う形状である。保温用ゴム部材２２は、金属基体部材２１の上側及び下側に形成されている折り曲げ部２４が折り曲げられて、金属基体部材２１と折り曲げ部２４の間に挟み込まれることにより、金属基体部材２１に固定されている。保温用ゴム部材２２では、金属基体部材２１側とは反対側の保温用ゴム部材２２の面が、溝状冷却水流路の中下部のシリンダボア側の壁面１７に接する接触面２５である。   The heat insulating rubber member 22 is formed in a shape in which two arcs are continuous when viewed from above, and the shape on the contact surface 25 side of the heat insulating rubber member 22 is the middle and lower part of the groove-shaped cooling water flow path 14. It is a shape along the wall surface of the cylinder bore side. The heat retaining rubber member 22 is sandwiched between the metal base member 21 and the bent portion 24 by bending the bent portions 24 formed on the upper side and the lower side of the metal base member 21. It is fixed. In the heat retaining rubber member 22, the surface of the heat retaining rubber member 22 on the side opposite to the metal base member 21 side is a contact surface 25 in contact with the wall surface 17 on the cylinder bore side in the lower part of the grooved cooling water flow path.

金属基体部材２１は、上から見たときに、２つの円弧が連続する形状に成形されており、金属基体部材２１の形状は、保温用ゴム部材２２の背面側（接触面２５側とは反対側の面）に沿う形状である。   When viewed from above, the metal base member 21 is formed in a shape in which two arcs are continuous, and the shape of the metal base member 21 is opposite to the back side of the heat retaining rubber member 22 (the side opposite to the contact surface 25 side). Side surface).

シリンダボア壁の保温具２０の保温用ゴム部材２２は、溝状冷却水流路１４の中下部のボア側の壁面うち、中間ボア１２ｂ１側の壁面に接する保温用ゴム部材各ボア部３６ａと、中間ボア１２ｂ２側の壁面に接する保温用ゴム部材各ボア部３６ｂと、からなる。そして、保温用ゴム部材の各ボア部３６ａは、中間ボア１２ｂ１のボア壁１３ｂ１を保温するための部位であり、保温用ゴム部材の各ボア部３６ｂは、中間ボア１２ｂ２のボア壁１３ｂ２を保温するための保温用ゴム部材の部位である。   The heat retaining rubber member 22 of the heat retaining member 20 on the cylinder bore wall includes a bore 36a for each of the heat retaining rubber members in contact with the wall surface on the intermediate bore 12b1 side of the bore-side wall surface in the middle and lower part of the grooved cooling water flow path 14, and the intermediate bore. The heat insulating rubber member each bore portion 36b in contact with the wall surface on the 12b2 side. Each of the bore portions 36a of the heat retaining rubber member is a portion for keeping the bore wall 13b1 of the intermediate bore 12b1, and each of the bore portions 36b of the heat retaining rubber member keeps the bore wall 13b2 of the intermediate bore 12b2. It is the site | part of the rubber member for heat insulation for this.

シリンダボア壁の保温具２０の金属基体部材２１は、保温用ゴム部材の各ボア部３６ａが固定される金属基体部材の各ボア部３８ａと、保温用ゴム部材の各ボア部３６ｂが固定される金属基体部材の各ボア部３８ｂと、からなる。金属基体部材２１は、１つの金属板で形成されている。よって、シリンダボア壁の保温具２０の金属基体部材２１は、一端３９ａから他端３９ｂまでが、繋がっている。   The metal base member 21 of the heat retaining member 20 on the cylinder bore wall has a metal base member 21 to which each bore portion 36a of the heat retaining rubber member is fixed, and a metal portion to which each bore portion 36b of the heat retaining rubber member is fixed. Each bore portion 38b of the base member. The metal base member 21 is formed of one metal plate. Therefore, the metal base member 21 of the heat insulator 20 on the cylinder bore wall is connected from one end 39a to the other end 39b.

金属基体部材２１の背面側（保温用ゴム部材が固定されている面とは反対側）には、背面側ゴム部材２３が固定されている。背面側ゴム部材２３は、上から見たときに、円弧形状に成形されており、背面側ゴム部材２３の接触面２６側の形状は、溝状冷却水流路１４の中下部のシリンダボア側の壁面とは反対側の壁面１８に沿う形状である。背面側ゴム部材２３は、金属基体部材２１の背面側に、接着剤で接着されることにより、金属基体部材２１に固定されている。背面側ゴム部材２３では、金属基体部材２１側とは反対側の背面側ゴム部材２３の面が、溝状冷却水流路の中下部のシリンダボア側の壁面とは反対側の壁面１８に接する接触面２６である。   A back side rubber member 23 is fixed to the back side of the metal base member 21 (the side opposite to the side where the heat retaining rubber member is fixed). The back side rubber member 23 is formed in an arc shape when viewed from above, and the shape of the back side rubber member 23 on the contact surface 26 side is the wall surface on the cylinder bore side in the middle and lower part of the grooved cooling water flow path 14. It is a shape along the wall surface 18 on the opposite side. The back side rubber member 23 is fixed to the metal base member 21 by being bonded to the back side of the metal base member 21 with an adhesive. In the back side rubber member 23, the surface of the back side rubber member 23 opposite to the metal base member 21 side is in contact with the wall surface 18 on the side opposite to the wall surface on the cylinder bore side in the middle and lower part of the groove-like cooling water flow path. 26.

シリンダボア壁の保温具２０は、例えば、図１に示すシリンダブロック１１の溝状冷却水流路１４の中下部に設置される。図８に示すように、シリンダボア壁の保温具２０を、シリンダブロック１１の溝状冷却水流路１４に挿入して、図９及び図１０に示すように、シリンダボア壁の保温具２０を、溝状冷却水流路１４の中下部に設置する。シリンダボア壁の保温具２０は、保温用ゴム部材２２の形状が、溝状冷却水流路の中下部のシリンダボア側の全壁面１７のうち、２つのシリンダボア１２ｂ１及び１２ｂ２側の壁面に沿った形状をしているので、シリンダボア壁の保温具２０は、シリンダボア１２ｂ１及び１２ｂ２側の壁面に、保温用ゴム部材２２が接触するように、溝状冷却水流路１４の中下部に設置される。   The heat retaining device 20 on the cylinder bore wall is installed, for example, in the middle and lower part of the groove-like cooling water flow path 14 of the cylinder block 11 shown in FIG. As shown in FIG. 8, the cylinder bore wall heat insulator 20 is inserted into the grooved coolant flow path 14 of the cylinder block 11, and the cylinder bore wall heat insulator 20 is inserted into the groove shape as shown in FIGS. 9 and 10. Installed in the middle and lower part of the cooling water channel 14. The heat retaining member 20 on the cylinder bore wall has a shape of the heat retaining rubber member 22 along the wall surfaces on the two cylinder bores 12b1 and 12b2 side of the entire wall surface 17 on the cylinder bore side in the middle and lower part of the grooved cooling water flow path. Therefore, the heat retaining device 20 on the cylinder bore wall is installed in the middle and lower part of the grooved cooling water flow path 14 so that the heat retaining rubber member 22 is in contact with the wall surface on the cylinder bores 12b1 and 12b2 side.

このとき、シリンダボア壁の保温具２０では、保温用ゴム部材２２の接触面２５から背面側ゴム部材２３の接触面２６までの距離が、溝状冷却水流路１４の幅よりも大きくなるように、背面側ゴム部材２３が付設されている。そのため、シリンダボア壁の保温具２０が、溝状冷却水流路１４の中下部に設置されると、背面側ゴム部材２３が、金属基体部材２１及び保温用ゴム部材２２と溝状冷却水流路の中下部のシリンダボア側の壁面とは反対側の壁面１８との間に挟まれることにより、背面側ゴム部材２３には、元に戻ろうとする弾性力が生じる。そして、この弾性力により、金属基体部材２１は、溝状冷却水流路のシリンダボア側の壁面１７に向かって押され、その結果、金属基体部材２１により、保温用ゴム部材２２が、溝状冷却水流路のシリンダボア側の壁面１７に押し付けられる。つまり、シリンダボア壁の保温具２０が、溝状冷却水流路１４の中下部に設置されることにより、背面側ゴム部材２３に弾性力が生じ、この弾性力により、保温用ゴム部材２２を溝状冷却水流路のシリンダボア側の壁面１７に押し付けるように、金属基体部材２１が付勢される。このようにして、シリンダボア壁の保温具２０は、保温用ゴム部材２２が、溝状冷却水流路の中下部のシリンダボア側の全壁面１７のうちの２つのシリンダボア１２ｂ１及び１２ｂ２のボア側の壁面に接触する。   At this time, in the heat retaining device 20 on the cylinder bore wall, the distance from the contact surface 25 of the heat retaining rubber member 22 to the contact surface 26 of the back side rubber member 23 is larger than the width of the grooved cooling water flow path 14. A back side rubber member 23 is attached. Therefore, when the heat insulator 20 on the cylinder bore wall is installed in the middle and lower part of the groove-like cooling water flow path 14, the back side rubber member 23 is placed in the groove-like cooling water flow path with the metal base member 21 and the heat retaining rubber member 22. By being sandwiched between the wall surface 18 on the opposite side to the wall surface on the lower cylinder bore side, an elastic force is generated in the back side rubber member 23 to return to the original. Then, by this elastic force, the metal base member 21 is pushed toward the wall surface 17 on the cylinder bore side of the groove-shaped cooling water flow path. As a result, the heat retaining rubber member 22 is caused to flow into the groove-shaped cooling water flow by the metal base member 21. It is pressed against the wall surface 17 on the cylinder bore side of the road. That is, by installing the heat insulator 20 on the cylinder bore wall in the middle and lower part of the groove-shaped cooling water flow path 14, an elastic force is generated in the back-side rubber member 23, and the heat-insulating rubber member 22 is grooved by this elastic force. The metal base member 21 is biased so as to be pressed against the wall surface 17 on the cylinder bore side of the cooling water passage. In this manner, the heat retaining member 20 on the cylinder bore wall has the heat retaining rubber member 22 on the wall surface on the bore side of the two cylinder bores 12b1 and 12b2 of the entire wall surface 17 on the cylinder bore side in the lower part of the grooved coolant flow path. Contact.

また、金属基体部材２１と、溝状冷却水流路の中下部のシリンダボア側の壁面とは反対側の壁面１８と、の間には、中下部の上下方向の全体に亘って、背面側ゴム部材２３が存在しているので、背面側ゴム部材２３により、金属基体部材２１と溝状冷却水流路の中下部のシリンダボア側の壁面とは反対側の壁面１８との間に冷却水が流れることが抑制される。   In addition, between the metal base member 21 and the wall surface 18 on the opposite side of the wall surface on the cylinder bore side in the middle and lower part of the groove-shaped cooling water flow path, the back side rubber member extends over the entire middle and lower part in the vertical direction. 23 exists, the back side rubber member 23 causes the cooling water to flow between the metal base member 21 and the wall surface 18 on the opposite side to the wall surface on the cylinder bore side in the lower part of the grooved cooling water flow path. It is suppressed.

このように、背面側ゴム部材２３は、金属基体部材２１を付勢するための部材兼金属基体部材２１と溝状冷却水流路の中下部のシリンダボア側の壁面とは反対側の壁面１８との間に冷却水が流れることを抑制するための部材として機能する。   As described above, the back side rubber member 23 is formed by the member / metal base member 21 for biasing the metal base member 21 and the wall surface 18 on the opposite side to the wall surface on the cylinder bore side in the middle and lower part of the grooved cooling water flow path. It functions as a member for suppressing the flow of cooling water between them.

シリンダボア壁の保温具２０は、例えば、図１１〜図１５に示す方法により製造される。なお、本発明のシリンダボア壁の保温具は、以下に示す方法により製造されるものに限定されるものではない。   The cylinder bore wall heat insulator 20 is manufactured, for example, by the method shown in FIGS. Note that the cylinder bore wall heat insulator of the present invention is not limited to the one manufactured by the method described below.

先ず、図１１に示す矩形の金属板３０から、点線で示す切り落とし部分３１を切り落とし、図１２に示す成形前の金属基体部材２１を作製する。金属基体部材２１には、上側及び下側に、折り曲げ部２４が形成されている。   First, a cut-off portion 31 indicated by a dotted line is cut off from a rectangular metal plate 30 shown in FIG. 11 to produce a metal base member 21 before forming shown in FIG. A bent portion 24 is formed on the upper and lower sides of the metal base member 21.

次いで、図１３に示すように、成形前の金属基体部材２１を、保温用ゴム部材２２の背面側（図１４に示す保温用ゴム部材２２の背面３３側）に沿う形状に成形する。   Next, as shown in FIG. 13, the metal base member 21 before molding is molded into a shape along the back side of the heat retaining rubber member 22 (the back surface 33 side of the heat retaining rubber member 22 shown in FIG. 14).

次いで、図１４に示すように、接触面２５側が溝状冷却水流路１４の中下部のシリンダボア側の壁面１７に沿う形状に成形された保温用ゴム部材２２と、成形後の金属基体部材２１を合わせる。   Next, as shown in FIG. 14, the heat retaining rubber member 22 formed so that the contact surface 25 side is aligned with the wall surface 17 on the cylinder bore side in the middle and lower part of the groove-like cooling water flow path 14, and the metal base member 21 after forming are formed. Match.

次いで、図１５に示すように、折り曲げ部２４を保温用ゴム部材側に折り曲げて、折り曲げ部２４と金属基体部材２１とで保温用ゴム部材２２を挟み込むことにより、金属基体部材２１に保温用ゴム部材２２を固定する。更に、金属基体部材２１の背面側３４に、背面側ゴム部材２３を接着剤で張り合わせて、シリンダボア壁の保温具を得る。   Next, as shown in FIG. 15, the bent portion 24 is bent toward the heat insulating rubber member, and the heat insulating rubber member 22 is sandwiched between the bent portion 24 and the metal base member 21, whereby the heat insulating rubber is attached to the metal base member 21. The member 22 is fixed. Further, the rubber member 23 on the back side is bonded to the back side 34 of the metal base member 21 with an adhesive to obtain a heat insulator for the cylinder bore wall.

本発明のシリンダボア壁の保温具は、シリンダボアを有する内燃機関のシリンダブロックの溝状冷却水流路の中下部に設置され、全シリンダボアのボア壁のうちの一部のボア壁を保温するためのシリンダボア壁の保温具であり、
溝状冷却水流路の中下部のシリンダボア側の全壁面のうちの１つのシリンダボアの壁面又は２つ以上のシリンダボアに亘る分の壁面に接触する保温用ゴム部材と、該保温用ゴム部材が固定される金属基体部材と、該金属基体部材の背面側に固定され、該溝状冷却水流路の中下部のシリンダボア側の壁面に向かって、該金属基体部材が該保温用ゴム部材を押し付けるように付勢すると共に、該金属基体部材と溝状冷却水流路の中下部のシリンダボア側の壁面とは反対側の壁面との間の冷却水流れを抑制する付勢兼背面側流れ抑制部材と、からなり、
該付勢兼背面側流れ抑制部材が、該金属基体部材の各ボア部毎に、１つ以上付設されていること、
を特徴するシリンダボア壁の保温具である。 A cylinder bore wall heat insulator according to the present invention is installed in the middle and lower part of a groove-like cooling water flow path of a cylinder block of an internal combustion engine having a cylinder bore, and is a cylinder bore for keeping a part of the bore walls of all cylinder bores. Wall insulation,
A heat retaining rubber member that is in contact with the wall surface of one cylinder bore or two or more cylinder bores among all the wall surfaces on the cylinder bore side in the middle and lower part of the grooved cooling water flow path, and the heat retaining rubber member are fixed A metal base member that is fixed to the back side of the metal base member, and is attached so that the metal base member presses the heat retaining rubber member toward the wall surface on the cylinder bore side in the lower part of the grooved cooling water flow path. And a biasing and back side flow suppressing member that suppresses cooling water flow between the metal base member and the wall surface on the opposite side to the wall surface on the cylinder bore side in the middle and lower part of the grooved cooling water flow path. ,
One or more of the biasing and back side flow suppressing members are provided for each bore portion of the metal base member;
A cylinder bore wall heat insulator characterized by

本発明のシリンダボア壁の保温具としては、以下に示す本発明の第一の形態のシリンダボア壁の保温具、本発明の第二の形態のシリンダボア壁の保温具、本発明の第三の形態のシリンダボア壁の保温具が挙げられる。   As the cylinder bore wall heat insulator of the present invention, the cylinder bore wall heat retainer of the first embodiment of the present invention, the cylinder bore wall heat retainer of the second embodiment of the present invention, and the third embodiment of the present invention shown below. An example of this is a cylinder bore wall heat insulator.

本発明の第一の形態のシリンダボア壁の保温具（以下、本発明のシリンダボア壁の保温具（１）とも記載する。）は、４つ以上のシリンダボアを有する内燃機関のシリンダブロックの溝状冷却水流路の中下部に設置され、全シリンダボアのボア壁のうちの一部のボア壁を保温するための保温具であり、
溝状冷却水流路の中下部のシリンダボア側の全壁面のうちの２つ又は３つのシリンダボアに亘る分の壁面に接触する保温用ゴム部材と、該保温用ゴム部材が固定される金属基体部材と、該金属基体部材の背面側に固定され、該溝状冷却水流路の中下部のシリンダボア側の壁面に向かって、該金属基体部材が該保温用ゴム部材を押し付けるように付勢すると共に、該金属基体部材と溝状冷却水流路の中下部のシリンダボア側の壁面とは反対側の壁面との間の冷却水流れを抑制する付勢兼背面側流れ抑制部材と、からなり、
該付勢兼背面側流れ抑制部材が、該金属基体部材の各ボア部毎に、１つ以上付設されていること、
を特徴するシリンダボア壁の保温具である。 The cylinder bore wall heat retaining device (hereinafter also referred to as the cylinder bore wall heat retaining device (1) of the present invention) according to the first aspect of the present invention is a groove cooling of a cylinder block of an internal combustion engine having four or more cylinder bores. It is installed in the middle and lower part of the water flow path, and is a heat insulator for heat retaining a part of the bore walls of all cylinder bores,
A heat insulating rubber member that contacts two or three cylinder bores of the entire wall surface on the cylinder bore side in the middle and lower part of the grooved cooling water flow path, and a metal base member to which the heat insulating rubber member is fixed The metal base member is fixed to the back side of the metal base member, and urges the metal base member to press the heat insulating rubber member toward the wall surface on the cylinder bore side in the lower part of the grooved cooling water flow path, An urging and back side flow suppressing member that suppresses the flow of cooling water between the metal base member and the wall surface on the opposite side to the wall surface on the cylinder bore side in the middle and lower part of the grooved cooling water flow path,
One or more of the biasing and back side flow suppressing members are provided for each bore portion of the metal base member;
A cylinder bore wall heat insulator characterized by

本発明の第二の形態のシリンダボア壁の保温具（以下、本発明のシリンダボア壁の保温具（２）とも記載する。）は、３つのシリンダボアを有する内燃機関のシリンダブロックの溝状冷却水流路の中下部に設置され、全シリンダボアのボア壁のうちの一部のボア壁を保温するためのシリンダボア壁の保温具であり、
溝状冷却水流路の中下部のシリンダボア側の全壁面のうちの２つのシリンダボアに亘る分の壁面に接触する保温用ゴム部材と、該保温用ゴム部材が固定される金属基体部材と、該金属基体部材の背面側に固定され、該溝状冷却水流路の中下部のシリンダボア側の壁面に向かって、該金属基体部材が該保温用ゴム部材を押し付けるように付勢すると共に、該金属基体部材と溝状冷却水流路の中下部のシリンダボア側の壁面とは反対側の壁面との間の冷却水流れを抑制する付勢兼背面側流れ抑制部材と、からなり、
該付勢兼背面側流れ抑制部材が、該金属基体部材の各ボア部毎に、１つ以上付設されていること、
を特徴するシリンダボア壁の保温具である。 A cylinder bore wall heat retaining device (hereinafter also referred to as a cylinder bore wall heat retaining device (2) of the present invention) according to a second aspect of the present invention is a grooved coolant flow path of a cylinder block of an internal combustion engine having three cylinder bores. Is a cylinder bore wall heat insulator for heat retaining a part of the bore walls of all cylinder bores,
A heat insulating rubber member that contacts two cylinder bores of all wall surfaces on the cylinder bore side in the middle and lower part of the grooved cooling water flow path, a metal base member to which the heat insulating rubber member is fixed, and the metal The metal base member is fixed to the back surface side of the base member member, and urges the metal base member member to press the heat retaining rubber member toward the wall surface on the cylinder bore side in the lower part of the grooved cooling water flow path. And a biasing and back side flow suppressing member that suppresses the cooling water flow between the wall surface on the opposite side to the wall surface on the cylinder bore side in the middle and lower part of the grooved cooling water flow path,
One or more of the biasing and back side flow suppressing members are provided for each bore portion of the metal base member;
A cylinder bore wall heat insulator characterized by

本発明の第三の形態のシリンダボア壁の保温具（以下、本発明のシリンダボア壁の保温具（３）とも記載する。）は、２つ以上のシリンダボアを有する内燃機関のシリンダブロックの溝状冷却水流路の中下部に設置され、全シリンダボアのボア壁のうちの一部のボア壁を保温するためのシリンダボア壁の保温具であり、
溝状冷却水流路の中下部のシリンダボア側の全壁面のうちの１つのシリンダボアの壁面に接触する保温用ゴム部材と、該保温用ゴム部材が固定される金属基体部材と、該金属基体部材の背面側に固定され、該溝状冷却水流路の中下部のシリンダボア側の壁面に向かって、該金属基体部材が該保温用ゴム部材を押し付けるように付勢すると共に、該金属基体部材と溝状冷却水流路の中下部のシリンダボア側の壁面とは反対側の壁面との間の冷却水流れを抑制する付勢兼背面側流れ抑制部材と、からなり、
該付勢兼背面側流れ抑制部材が、該金属基体部材の各ボア部毎に、１つ以上付設されていること、
を特徴するシリンダボア壁の保温具である。 A cylinder bore wall heat retaining device (hereinafter also referred to as a cylinder bore wall heat retaining device (3) of the present invention) according to a third aspect of the present invention is a groove-like cooling of a cylinder block of an internal combustion engine having two or more cylinder bores. A cylinder bore wall heat insulator that is installed in the lower part of the water flow path and heats a part of the bore walls of all the cylinder bores,
A heat insulating rubber member that is in contact with the wall surface of one of the cylinder bores on the cylinder bore side in the middle and lower part of the grooved cooling water flow path; a metal base member to which the heat insulating rubber member is fixed; The metal base member is fixed to the rear surface and urged toward the wall surface on the cylinder bore side in the lower part of the groove-like cooling water flow path so as to press the heat retaining rubber member. An urging and back side flow suppressing member for suppressing the flow of cooling water between the wall surface on the opposite side of the cylinder bore side wall in the lower part of the cooling water flow path,
One or more of the biasing and back side flow suppressing members are provided for each bore portion of the metal base member;
A cylinder bore wall heat insulator characterized by

本発明のシリンダボア壁の保温具（１）と本発明のシリンダボア壁の保温具（２）と本発明のシリンダボア壁の保温具（３）とは、保温具が設置されるシリンダブロックのシリンダボアの数が異なること及びゴム部材各ボア部の数が異なること以外は同様である。   The cylinder bore wall heat insulator (1) of the present invention, the cylinder bore wall heat retainer (2) of the present invention, and the cylinder bore wall heat retainer (3) of the present invention are the number of cylinder bores of the cylinder block in which the heat retainer is installed. This is the same except that the number of bore portions of the rubber member is different.

本発明のシリンダボア壁の保温具（１）、（２）又は（３）は、内燃機関のシリンダブロックの溝状冷却水流路の中下部に設置される。本発明のシリンダボア壁の保温具（１）が設置されるシリンダブロックは、シリンダボアが直列に４つ以上並んで形成されているオープンデッキ型のシリンダブロックであるので、２つの端ボアと２つ以上の中間ボアとからなるシリンダボアを有している。また、本発明のシリンダボア壁の保温具（２）が設置されるシリンダブロックは、シリンダボアが直列に３つ並んで形成されているオープンデッキ型のシリンダブロックであるので、２つの端ボアと１つの中間ボアとからなるシリンダボアを有している。本発明のシリンダボア壁の保温具（３）が設置されるシリンダブロックは、シリンダボアが直列に２つ以上並んで形成されているオープンデッキ型のシリンダブロックであるので、２つの端ボアからなるシリンダボア又は２つの端ボアと１つ以上の中間ボアとからなるシリンダボアを有している。なお、本発明では、直列に並んだシリンダボアのうち、両端のボアを端ボアと呼び、両側が他のシリンダボアで挟まれているボアを中間ボアと呼ぶ。   The cylinder bore wall heat insulator (1), (2) or (3) according to the present invention is installed in the middle and lower part of the grooved coolant flow path of the cylinder block of the internal combustion engine. The cylinder block on which the cylinder bore wall heat insulating device (1) of the present invention is installed is an open deck type cylinder block in which four or more cylinder bores are arranged in series, so that it has two end bores and two or more end bores. The cylinder bore is composed of an intermediate bore. In addition, the cylinder block in which the cylinder bore wall heat insulator (2) of the present invention is installed is an open deck type cylinder block in which three cylinder bores are arranged in series, so that there are two end bores and one cylinder block. It has a cylinder bore consisting of an intermediate bore. The cylinder block in which the cylinder bore wall heat insulator (3) according to the present invention is installed is an open deck type cylinder block in which two or more cylinder bores are arranged in series. Therefore, a cylinder bore composed of two end bores or It has a cylinder bore consisting of two end bores and one or more intermediate bores. In the present invention, among the cylinder bores arranged in series, the bores at both ends are called end bores, and the bores sandwiched between the other cylinder bores are called intermediate bores.

本発明のシリンダボア壁の保温具（１）、（２）又は（３）が設置される位置は、溝状冷却水流路の中下部である。図２では、溝状冷却水流路１４の最上部９と最下部８の中間近傍の位置１０を、点線で示しているが、この中間近傍の位置１０から下側の溝状冷却水流路１４の部分を、溝状冷却水流路の中下部と呼ぶ。なお、溝状冷却水流路の中下部とは、溝状冷却水流路の最上部と最下部の丁度中間の位置から下の部分という意味ではなく、最上部と最下部の中間位置の近傍から下の部分という意味である。よって、溝状冷却水流路の最下部からどの位置までを本発明の保温具で保温するか、つまり、保温用ゴム部材の上端の位置を溝状冷却水流路の上下方向のどの位置にするかは、適宜選択される。   The position where the heat insulator (1), (2) or (3) is installed on the cylinder bore wall of the present invention is the middle and lower part of the grooved cooling water flow path. In FIG. 2, a position 10 near the middle between the uppermost part 9 and the lowermost part 8 of the groove-like cooling water flow path 14 is indicated by a dotted line, but the groove-like cooling water flow path 14 on the lower side from the position 10 near the middle is shown. This portion is referred to as the middle lower portion of the grooved cooling water flow path. The middle and lower part of the grooved cooling water flow path does not mean the part below the middle part between the uppermost part and the lowermost part of the grooved cooling water flow path. It means the part. Therefore, the position from the lowest part of the grooved cooling water flow path to the heat retaining device of the present invention, that is, the position of the upper end of the heat insulating rubber member in the vertical direction of the grooved cooling water flow path Is appropriately selected.

保温用ゴム部材は、溝状冷却水流路の中下部のシリンダボア側の壁面に接することにより、シリンダボア壁の中下部を保温する部材である。そのため、この保温用ゴム部材の接触面側の形状は、溝状冷却水流路の中下部のシリンダボア側の壁面に沿う形状である。そして、本発明のシリンダボア壁の保温具（１）、（２）又は（３）が、溝状冷却水流路の中下部に設置されることにより、付勢兼背面側流れ抑制部材が金属基体部材を押し、そのことにより、保温用ゴム部材は、接触面側（金属基体部材側とは反対側の面側）が、溝状冷却水流路の中下部のシリンダボア側の壁面に接し、押し付けられる。   The heat retaining rubber member is a member that keeps the middle and lower portions of the cylinder bore wall in contact with the wall surface on the cylinder bore side in the middle and lower portion of the grooved coolant flow path. Therefore, the shape on the contact surface side of the heat retaining rubber member is a shape along the wall surface on the cylinder bore side in the middle and lower part of the grooved cooling water flow path. The cylinder bore wall heat insulator (1), (2) or (3) of the present invention is installed in the middle and lower part of the groove-like cooling water flow path, so that the urging and back side flow suppressing member is a metal base member. As a result, the heat-insulating rubber member is pressed against the wall surface on the cylinder bore side in the lower part of the grooved cooling water flow path on the contact surface side (surface side opposite to the metal base member side).

保温用ゴム部材の材質としては、例えば、ソリッドゴム、膨張ゴム、発泡ゴム、軟性ゴム等のゴム、シリコーン系ゲル状素材等が挙げられる。そして、ゴム部材の材質としては、シリンダボア壁の保温具を溝状冷却水流路内に設置するときに、ゴム部材がシリンダボア壁に強く接触して、ゴム部材が削られるのを防ぐことができる点で、シリンダボア壁の保温具の設置後に、溝状冷却水流路内でゴム部材部分を膨張させることができる感熱膨張ゴム又は水膨潤性ゴムが好ましい。   Examples of the material for the heat retaining rubber member include solid rubber, expanded rubber, foamed rubber, soft rubber and other rubbers, and silicone-based gel material. And as a material of the rubber member, when installing the heat insulator of the cylinder bore wall in the grooved cooling water flow path, it is possible to prevent the rubber member from coming into strong contact with the cylinder bore wall and scraping the rubber member. Thus, it is preferable to use heat-expandable rubber or water-swellable rubber that can expand the rubber member portion in the groove-shaped cooling water flow path after the installation of the heat insulator on the cylinder bore wall.

ソリッドゴムの組成としては、天然ゴム、ブタジエンゴム、エチレンプロピレンジエンゴム（ＥＰＤＭ）、ニトリルブタジエンゴム（ＮＢＲ）、シリコーンゴム、フッ素ゴム等が挙げられる。   Examples of the composition of the solid rubber include natural rubber, butadiene rubber, ethylene propylene diene rubber (EPDM), nitrile butadiene rubber (NBR), silicone rubber, fluorine rubber, and the like.

膨張ゴムとしては、感熱膨張ゴムが挙げられる。感熱膨張ゴムは、ベースフォーム材にベースフォーム材より融点が低い熱可塑性物質を含浸させ圧縮した複合体であり、常温では少なくともその表層部に存在する熱可塑性物質の硬化物により圧縮状態が保持され、且つ、加熱により熱可塑性物質の硬化物が軟化して圧縮状態が開放される材料である。感熱膨張ゴムとしては、例えば、特開２００４−１４３２６２号公報に記載の感熱膨張ゴムが挙げられる。保温用ゴム部材の材質が感熱膨張ゴムの場合は、本発明のシリンダボア壁の保温具が溝状冷却水流路の中下部に設置され、感熱膨張ゴムに熱が加えられることで、感熱膨張ゴムが膨張して、所定の形状に膨張変形する。   Examples of the expanded rubber include heat-sensitive expanded rubber. Thermally-expandable rubber is a composite in which a base foam material is impregnated with a thermoplastic material having a melting point lower than that of the base foam material and is compressed. At room temperature, the compressed state is maintained by at least the cured product of the thermoplastic material on the surface layer. In addition, the cured material of the thermoplastic material is softened by heating, and the compressed state is released. Examples of the heat-sensitive expansion rubber include heat-sensitive expansion rubber described in JP-A-2004-143262. In the case where the material of the heat insulating rubber member is heat-sensitive expansion rubber, the heat insulating material for the cylinder bore wall according to the present invention is installed in the lower part of the groove-like cooling water flow path, and heat is applied to the heat-sensitive expansion rubber so that the heat-sensitive expansion rubber is It expands and deforms into a predetermined shape.

感熱膨張ゴムに係るベースフォーム材としては、ゴム、エラストマー、熱可塑性樹脂、熱硬化性樹脂等の各種高分子材料が挙げられ、具体的には、天然ゴム、クロロプロピレンゴム、スチレンブタジエンゴム、ニトリルブタジエンゴム、エチレンプロピレンジエン三元共重合体、シリコーンゴム、フッ素ゴム、アクリルゴム等の各種合成ゴム、軟質ウレタン等の各種エラストマー、硬質ウレタン、フェノール樹脂、メラミン樹脂等の各種熱硬化性樹脂が挙げられる。   Examples of the base foam material relating to the heat-expandable rubber include various polymer materials such as rubber, elastomer, thermoplastic resin, and thermosetting resin. Specifically, natural rubber, chloropropylene rubber, styrene butadiene rubber, nitrile Examples include butadiene rubber, ethylene propylene diene terpolymer, various synthetic rubbers such as silicone rubber, fluoro rubber, and acrylic rubber, various elastomers such as soft urethane, various thermosetting resins such as hard urethane, phenol resin, and melamine resin. It is done.

感熱膨張ゴムに係る熱可塑性物質としては、ガラス転移点、融点又は軟化温度のいずれかが１２０℃未満であるものが好ましい。感熱膨張ゴムに係る熱可塑性物質としては、ポリエチレン、ポリプロピレン、ポリスチレン、ポリ塩化ビニル、ポリ塩化ビニリデン、ポリ酢酸ビニル、ポリアクリル酸エステル、スチレンブタジエン共重合体、塩素化ポリエチレン、ポリフッ化ビニリデン、エチレン酢酸ビニル共重合体、エチレン酢酸ビニル塩化ビニルアクリル酸エステル共重合体、エチレン酢酸ビニルアクリル酸エステル共重合体、エチレン酢酸ビニル塩化ビニル共重合体、ナイロン、アクリロニトリルブタジエン共重合体、ポリアクリロニトリル、ポリ塩化ビニル、ポリクロロプレン、ポリブタジエン、熱可塑性ポリイミド、ポリアセタール、ポリフェニレンサルファイド、ポリカーボネート、熱可塑性ポリウレタン等の熱可塑性樹脂、低融点ガラスフリット、でんぷん、はんだ、ワックス等の各種熱可塑性化合物が挙げられる。   As the thermoplastic substance related to the heat-sensitive expansion rubber, those having any of glass transition point, melting point or softening temperature of less than 120 ° C are preferable. Thermoplastic materials related to heat-expandable rubber include polyethylene, polypropylene, polystyrene, polyvinyl chloride, polyvinylidene chloride, polyvinyl acetate, polyacrylate ester, styrene butadiene copolymer, chlorinated polyethylene, polyvinylidene fluoride, ethylene acetate Vinyl copolymer, ethylene vinyl acetate vinyl chloride acrylic ester copolymer, ethylene vinyl acetate acrylic ester copolymer, ethylene vinyl acetate vinyl chloride copolymer, nylon, acrylonitrile butadiene copolymer, polyacrylonitrile, polyvinyl chloride , Polychloroprene, polybutadiene, thermoplastic polyimide, polyacetal, polyphenylene sulfide, polycarbonate, thermoplastic resins such as thermoplastic polyurethane, low melting glass frit, starch Solder include various thermoplastic compounds such as wax.

また、膨張ゴムとしては、水膨潤性ゴムが挙げられる。水膨潤性ゴムは、ゴムに吸水性物質が添加された材料であり、水を吸収して膨潤し、膨張した形状を保持する保形性を有するゴム材である。水膨潤性ゴムとしては、例えば、ポリアクリル酸中和物の架橋物、デンプンアクリル酸グラフト共重合体架橋物、架橋カルボキシメチルセルロース塩、ポリビニルアルコール等の吸水性物質がゴムに添加されたゴム材が挙げられる。また、水膨潤性ゴムとしては、例えば、特開平９−２０８７５２号公報に記載されているケチミン化ポリアミド樹脂、グリシジルエーテル化物、吸水性樹脂及びゴムを含有する水膨潤性ゴムが挙げられる。保温用ゴム部材の材質が水膨潤性ゴムの場合は、本発明のシリンダボア壁の保温具が溝状冷却水流路の中下部に設置され冷却水が流されて、水膨潤性ゴムが水を吸収することで、水膨潤性ゴムが膨張して所定の形状に膨張変形する。   Further, examples of the expanded rubber include water-swellable rubber. The water-swellable rubber is a material in which a water-absorbing substance is added to rubber, and is a rubber material having a shape retaining property that absorbs water and swells and maintains an expanded shape. Examples of the water-swellable rubber include a rubber material in which a water-absorbing substance such as a cross-linked product of neutralized polyacrylic acid, a cross-linked product of starch acrylic acid graft copolymer, a cross-linked carboxymethyl cellulose salt, and polyvinyl alcohol is added to the rubber. Can be mentioned. Examples of the water-swellable rubber include water-swellable rubbers containing ketiminated polyamide resins, glycidyl etherified products, water-absorbing resins and rubbers described in JP-A-9-208752. When the material of the heat retaining rubber member is water swellable rubber, the heat insulating device for the cylinder bore wall of the present invention is installed in the lower part of the grooved cooling water flow path, the cooling water is flowed, and the water swellable rubber absorbs the water. By doing so, the water-swellable rubber expands and expands and deforms into a predetermined shape.

発泡ゴムは、多孔質のゴムである。発泡ゴムとしては、連続気泡構造を有するスポンジ状の発泡ゴム、独立気泡構造を有する発泡ゴム、半独立発泡ゴム等があげられる。発泡ゴムの材質としては、具体的には、例えば、エチレンプロピレンジエン三元共重合体、シリコーンゴム、ニトリルブタジエン共重合体、シリコーンゴム、フッ素ゴム等が挙げられる。発泡ゴムの発泡率は、特に制限されず、適宜選択され、発泡率を調節することにより、保温用ゴム部材の含水率を調節することができる。なお、発泡ゴムの発泡率とは、（（発泡前密度−発泡後密度）／発泡前密度）×１００で表される発泡前後の密度割合を指す。   Foam rubber is a porous rubber. Examples of the foam rubber include sponge-like foam rubber having an open cell structure, foam rubber having a closed cell structure, and semi-closed foam rubber. Specific examples of the material for the foam rubber include ethylene propylene diene terpolymer, silicone rubber, nitrile butadiene copolymer, silicone rubber, and fluoro rubber. The foaming rate of the foamed rubber is not particularly limited, and is appropriately selected. By adjusting the foaming rate, the moisture content of the heat retaining rubber member can be adjusted. The foaming rate of the foamed rubber refers to a density ratio before and after foaming represented by ((density before foaming−density after foaming) / density before foaming) × 100.

保温用ゴム部材の材質が水膨潤性ゴム、発泡ゴムのように、含水することができる材料の場合、本発明のシリンダボア壁の保温具が、溝状冷却水流路内に設置され、溝状冷却水流路に冷却水が流されたときに、保温用ゴム部材が含水する。溝状冷却水流路に冷却水が流されたときに、保温用ゴム部材の含水率を、どのような範囲とするかは、内燃機関の運転条件等により、適宜選択される。なお、含水率とは、（冷却水重量／（充填剤重量＋冷却水重量））×１００で表される重量含水率を指す。   When the material of the heat retaining rubber member is a material that can contain water, such as water-swellable rubber and foamed rubber, the heat retaining device for the cylinder bore wall of the present invention is installed in the grooved cooling water flow path, and the grooved cooling is performed. When the cooling water is passed through the water flow path, the heat retaining rubber member contains water. The range in which the moisture content of the heat retaining rubber member is set when the cooling water is caused to flow through the grooved cooling water flow path is appropriately selected depending on the operating conditions of the internal combustion engine. In addition, a moisture content refers to the weight moisture content represented by (cooling water weight / (filler weight + cooling water weight)) × 100.

保温用ゴム部材の厚みは、特に制限されず、適宜選択される。   The thickness of the heat insulating rubber member is not particularly limited and is appropriately selected.

金属基体部材は、保温用ゴム部材及び付勢兼背面側流れ抑制部材が固定される部材である。この金属基体部材は、付勢兼背面側流れ抑制部材による付勢力により押されることにより、保温用ゴム部材を溝状冷却水流路の中下部のシリンダボア側の壁面に均一に押し付ける部材である。そのため、金属基体部材の形状は、保温用ゴム部材の背面側（接触面とは反対側の面側）に沿う形状である。   The metal base member is a member to which the heat retaining rubber member and the urging and back side flow suppressing member are fixed. The metal base member is a member that uniformly presses the heat retaining rubber member against the wall surface on the cylinder bore side in the lower part of the grooved cooling water flow path by being pressed by the urging force by the urging and back side flow suppressing member. Therefore, the shape of the metal base member is a shape along the back side (the surface side opposite to the contact surface) of the heat retaining rubber member.

金属基体部材の材質としては、特に制限されないが、耐ロングライフクーラント性（以下、「耐ＬＬＣ性」と言う。）が良く及び強度が高い点で、ステンレス鋼（ＳＵＳ）、アルミニウム合金等が好ましい。金属基体部材の厚みは、特に制限されず、適宜選択される。   The material of the metal base member is not particularly limited, but stainless steel (SUS), aluminum alloy, and the like are preferable in terms of good long life coolant resistance (hereinafter referred to as “LLC resistance”) and high strength. . The thickness of the metal base member is not particularly limited and is appropriately selected.

付勢兼背面側流れ抑制部材は、金属基体部材の背面側に固定されている。この付勢兼背面側流れ抑制部材は、本発明のシリンダボア壁の保温具が溝状冷却水流路の中下部に設置されることにより、溝状冷却水流路の中下部のシリンダボア側の壁面に向かって、金属基体部材が保温用ゴム部材を押し付けるように付勢するための部材であると共に、金属基体部材と溝状冷却水流路の中下部のシリンダボア側の壁面とは反対側の壁面との間を流れる冷却水流れを抑制するための部材である。なお、金属基体部材の背面側とは、保温用ゴム部材が固定される面とは反対側を指す。   The urging and back side flow suppressing member is fixed to the back side of the metal base member. This biasing / back side flow restricting member faces the wall surface on the cylinder bore side in the middle and lower part of the grooved cooling water flow path by installing the heat insulator for the cylinder bore wall according to the present invention in the middle and lower part of the grooved cooling water flow path. In addition, the metal base member is a member for urging to press the rubber member for heat insulation, and between the metal base member and the wall surface on the opposite side to the wall surface on the cylinder bore side in the lower part of the grooved cooling water flow path. It is a member for suppressing the cooling water flow which flows through. The back side of the metal base member refers to the side opposite to the surface on which the heat retaining rubber member is fixed.

付勢兼背面側流れ抑制部材の材質は、本発明のシリンダボア壁の保温具が、溝状冷却水流路の中下部に設置された時に、溝状冷却水流路の中下部のシリンダボア側の壁面に向かって、金属基体部材が保温用ゴム部材を押し付けるように付勢することができるものであれば、特に制限されない。付勢兼背面側流れ抑制部材の材質としては、例えば、ソリッドゴム、膨張ゴム、発泡ゴム、軟性ゴム等のゴムや、シリコーン系ゲル状素材等が挙げられる。付勢兼背面側流れ抑制部材に係るソリッドゴム、膨張ゴム、発泡ゴム、軟性ゴム等のゴム、シリコーン系ゲル状素材は、保温用ゴム部材に係るソリッドゴム、膨張ゴム、発泡ゴム、軟性ゴム等のゴム、シリコーン系ゲル状素材と同様である。また、付勢兼背面側流れ抑制部材の材質としては、熱可塑性樹脂又は熱硬化性樹脂等の樹脂が挙げられる。   The material of the urging and back side flow restraining member is such that when the cylinder bore wall heat insulator of the present invention is installed in the middle lower part of the grooved cooling water flow path, the cylinder bore side wall surface in the middle lower part of the grooved cooling water flow path is used. On the other hand, there is no particular limitation as long as the metal base member can be urged so as to press the rubber member for heat insulation. Examples of the material of the urging / back side flow suppressing member include rubbers such as solid rubber, expanded rubber, foamed rubber, and soft rubber, and silicone-based gel materials. Solid rubber, expanded rubber, foam rubber, soft rubber, etc. related to urging and back flow control member, silicone gel-like material, solid rubber, expanded rubber, foam rubber, soft rubber, etc. related to heat retaining rubber member This is the same as the rubber and silicone gel material. In addition, examples of the material of the urging and back side flow suppressing member include resins such as thermoplastic resins and thermosetting resins.

付勢兼背面側流れ抑制部材の形状は、本発明のシリンダボア壁の保温具が、溝状冷却水流路の中下部に設置された時に、金属基体部材の背面側と溝状冷却水流路の中下部のシリンダボア側の壁面とは反対側の壁面との間の冷却水流れを抑制できる形状であれば、特に制限されない。例えば、図４に示す形態例では、溝状冷却水流路の中下部の上下方向のほぼ全体に、付勢兼背面側流れ抑制部材が配置される形状であるが、金属基体部材の背面側と溝状冷却水流路の中下部のシリンダボア側の壁面とは反対側の壁面との間の冷却水流れが抑制される形状であればよく、他には、例えば、溝状冷却水流路の中下部の上下方向の一部に、付勢兼背面側流れ抑制部材が配置される形状が挙げられる。また、図４に示す形態例では、冷却水の流れ方向に見たとき（上から見たとき）に、金属基体部材の背面側と溝状冷却水流路の中下部のシリンダボア側の壁面とは反対側の壁面との隙間のほぼ全体を埋めるように、付勢兼背面側流れ抑制部材が配置される形状であるが、金属基体部材の背面側と溝状冷却水流路の中下部のシリンダボア側の壁面とは反対側の壁面との間の冷却水流れが抑制される形状であればよく、他には、例えば、後述する図１７に示す形態例のように、冷却水の流れ方向に見たとき（上から見たとき）に、金属基体部材の背面側と溝状冷却水流路の中下部のシリンダボア側の壁面とは反対側の壁面との隙間の一部分を埋めるように、付勢兼背面側流れ抑制部材が配置される形状が挙げられる。   The shape of the biasing / back side flow restraining member is such that when the heat insulator for the cylinder bore wall of the present invention is installed in the lower part of the grooved cooling water flow path, If it is a shape which can suppress the cooling water flow between the wall surface of the lower cylinder bore side and the opposite wall surface, it will not be restrict | limited. For example, in the embodiment shown in FIG. 4, the urging and back-side flow suppressing member is arranged in substantially the entire vertical direction of the middle and lower part of the groove-like cooling water flow path. Any shape is acceptable as long as the coolant flow between the wall surface on the opposite side to the wall surface on the cylinder bore side in the middle and lower part of the groove-like cooling water flow path is limited. A shape in which the urging and back-side flow suppressing member is arranged in a part of the vertical direction of the above is mentioned. Further, in the embodiment shown in FIG. 4, when viewed in the flow direction of the cooling water (when viewed from above), the back surface side of the metal base member and the wall surface on the cylinder bore side in the lower part of the grooved cooling water flow path are The urging and back side flow suppression member is arranged so as to fill almost the entire gap with the opposite wall surface, but the back side of the metal base member and the cylinder bore side in the lower part of the grooved coolant flow path As long as the cooling water flow between the opposite wall surface and the wall surface opposite to that of the wall surface is suppressed, the cooling water flow is viewed in the flow direction of the cooling water as shown in FIG. When viewed from above (when viewed from above), the energizing and The shape by which a back side flow suppression member is arrange | positioned is mentioned.

図４に示すシリンダボア壁の保温具２０では、保温用ゴム部材は、金属基体部材の上側及び下側に形成された折り曲げ部を、保温用ゴム部材側に折り曲げ、折り曲げ部と金属基体部材で保温用ゴム部材を挟み込むことにより、また、付勢兼背面側流れ抑制部材は、金属基体部材の背面側に接着剤を用いて接着することにより、それぞれ、金属基体部材に固定されているが、保温用ゴム部材及び付勢兼背面側流れ抑制部材の金属基体部材への固定方法は、特に制限されない。他の固定方法としては、例えば、保温用ゴム部材又は付勢兼背面側流れ抑制部材を金属基体部材に加熱融着させる方法、金属基体部材に突起部を設け、その突起部を保温用ゴム部材又は付勢兼背面側流れ抑制部材に嵌入させる方法等が挙げられる。   In the heat insulator 20 on the cylinder bore wall shown in FIG. 4, the heat insulating rubber member is formed by bending the bent portions formed on the upper side and the lower side of the metal base member toward the heat insulating rubber member, and the heat is maintained by the bent portion and the metal base member. The urging and back side flow restraining member is fixed to the metal base member by adhering to the back side of the metal base member by using an adhesive. The method for fixing the rubber member for energization and the biasing / back side flow suppressing member to the metal base member is not particularly limited. Other fixing methods include, for example, a method of heat-sealing a heat retaining rubber member or a biasing / back side flow suppressing member to a metal base member, a protrusion provided on the metal base member, and the protrusion being used as a heat retaining rubber member. Or the method of making it fit in an energizing and back side flow control member, etc. are mentioned.

本発明のシリンダボア壁の保温具（１）又は（２）では、保温対象が隣り合う２つのシリンダボアのボア壁、すなわち、２つのシリンダボアに亘る分のボア壁の場合、保温用ゴム部材は、シリンダボアのボア壁の溝状冷却水流路側の全壁面（すなわち、溝状冷却水流路のシリンダボア側の全壁面）のうち、その２つのシリンダボアに亘る分のボア壁の壁面（すなわち、その２つのシリンダボアに亘る分の溝状冷却水流路のシリンダボア側の壁面）且つ中下部の壁面と接触し、また、保温対象が連続して並ぶ３つのシリンダボアのボア壁、すなわち、３つのシリンダボアに亘る分のボア壁の場合、保温用ゴム部材は、シリンダボアのボア壁の溝状冷却水流路側の全壁面（すなわち、溝状冷却水流路のシリンダボア側の全壁面）のうち、その３つのシリンダボアに亘る分のボア壁の壁面（すなわち、その３つのシリンダボアに亘る分の溝状冷却水流路のシリンダボア側の壁面）且つ中下部の壁面と接触する。本発明では、保温対象となる１つ、２つ又は３つのシリンダボアのボア壁のうち、１つのシリンダボアのボア壁を保温するための保温用ゴム部材の部位を、保温用ゴム部材各ボア部と呼ぶ。よって、本発明のシリンダボア壁の保温具（１）又は（２）では、保温対象が２つのシリンダボアのボア壁の場合、保温用ゴム部材は、２つの保温用ゴム部材各ボア部からなり、また、保温対象が３つのシリンダボアのボア壁の場合、保温用ゴム部材は、３つの保温用ゴム部材各ボア部からなる。そして、本発明のシリンダボア壁の保温具（１）又は（２）が設置される位置、言い換えると、保温用ゴム部材が接触する溝状冷却水流路の中下部のシリンダボア側の壁面は、一端の端ボア側の壁面、他端の端ボア側の壁面、又は中間ボア側の壁面である。本発明のシリンダボア壁の保温具（１）又は（２）において、保温用ゴム部材は、一端の端ボア側の壁面、他端の端ボア側の壁面及び１つ以上の中間ボア側の壁面の各壁面のうちの２つ又は３つに接触する部位を有している。また、本発明のシリンダボア壁の保温具（３）では、保温対象が１つのシリンダボアのボア壁であるので、保温用ゴム部材は、シリンダボアのボア壁の溝状冷却水流路側の全壁面（すなわち、溝状冷却水流路のシリンダボア側の全壁面）のうち、その１つのシリンダボアのボア壁の壁面（すなわち、その１つのシリンダボアの溝状冷却水流路のシリンダボア側の壁面）且つ中下部の壁面と接触する。本発明のシリンダボア壁の保温具（３）では、保温用ゴム部材は、１つの保温用ゴム部材各ボア部からなる。そして、本発明のシリンダボア壁の保温具（３）が設置される位置、言い換えると、保温用ゴム部材が接触する溝状冷却水流路の中下部のシリンダボア側の壁面は、一端の端ボア側の壁面、他端の端ボア側の壁面、又は中間ボア側の壁面である。本発明のシリンダボア壁の保温具（３）において、保温用ゴム部材は、一端の端ボア側の壁面、他端の端ボア側の壁面及び中間ボア側の壁面の各壁面のうちの１つに接触する部位を有している。   In the cylinder bore wall heat retaining device (1) or (2) of the present invention, in the case of the bore wall of two cylinder bores adjacent to each other, that is, the bore wall extending over the two cylinder bores, the heat retaining rubber member is a cylinder bore. Among the entire wall surface of the bore wall on the grooved cooling water flow channel side (that is, the entire wall surface on the cylinder bore side of the grooved cooling water flow channel), the wall surface of the bore wall that extends over the two cylinder bores (that is, the two cylinder bores) The bore wall of the three cylinder bores that are in contact with the wall surface on the cylinder bore side of the grooved cooling water flow path) and the middle and lower wall surfaces, and in which the heat insulation objects are continuously arranged, that is, the bore wall that extends over the three cylinder bores In this case, the temperature retaining rubber member includes three of the wall surfaces on the grooved cooling water flow path side of the bore wall of the cylinder bore (that is, all wall surfaces on the cylinder bore side of the grooved cooling water flow path). Wall surface of minute bore wall over the cylinder bore (i.e., the cylinder bore wall surfaces of the minute groove-like cooling water passage over its three cylinder bores) in contact with and middle bottom wall. In the present invention, among the bore walls of one, two, or three cylinder bores that are to be kept warm, a portion of the warming rubber member for keeping the bore wall of one cylinder bore is referred to as each bore portion of the warming rubber member. Call. Therefore, in the cylinder bore wall heat retaining device (1) or (2) of the present invention, when the heat retaining object is the bore wall of two cylinder bores, the heat retaining rubber member is composed of the two heat retaining rubber member bore portions, and When the heat retaining object is the bore wall of three cylinder bores, the heat retaining rubber member is composed of the three heat retaining rubber member bore portions. The position of the cylinder bore wall heat retaining device (1) or (2) according to the present invention, in other words, the wall surface on the cylinder bore side in the middle and lower part of the grooved cooling water flow path with which the heat insulating rubber member contacts, The wall surface on the end bore side, the wall surface on the end bore side on the other end, or the wall surface on the intermediate bore side. In the cylinder bore wall heat insulator (1) or (2) according to the present invention, the heat insulating rubber member is formed of a wall surface on one end bore side, a wall surface on the other end bore side, and a wall surface on one or more intermediate bore sides. It has the site | part which contacts 2 or 3 of each wall surface. Further, in the heat retaining device (3) for the cylinder bore wall according to the present invention, since the heat retaining object is the bore wall of one cylinder bore, the heat retaining rubber member is the entire wall surface on the grooved coolant flow channel side of the bore wall of the cylinder bore (that is, Of all the wall surfaces on the cylinder bore side of the grooved cooling water flow path, the wall surface of the bore wall of that one cylinder bore (that is, the wall surface on the cylinder bore side of the groove cooling water flow path of that one cylinder bore) and the middle and lower wall surfaces To do. In the heat retaining tool (3) for the cylinder bore wall according to the present invention, the heat retaining rubber member includes one bore portion of each heat retaining rubber member. The cylinder bore wall heat retaining member (3) according to the present invention is installed at the position, in other words, the wall surface on the cylinder bore side in the lower part of the grooved cooling water flow path where the rubber member for heat insulation contacts is located on the end bore side of one end. A wall surface, a wall surface on the end bore side of the other end, or a wall surface on the intermediate bore side. In the heat insulator (3) for the cylinder bore wall according to the present invention, the heat retaining rubber member is attached to one of the wall surfaces on the end bore side, the end bore side on the other end, and the wall surface on the intermediate bore side on the other end. It has the part which contacts.

図４に示す形態例では、２つの保温用ゴム部材各ボア部３６ａ及び３６ｂが連続しているが、本発明は、これに制限されるものではない。本発明のシリンダボア壁の保温具（１）又は（２）の他の形態例としては、例えば、図１６に示す形態例のように、保温用ゴム部材が、各シリンダボアのボア側の壁面に対応する部位毎に分割されている形態例が挙げられる。また、本発明のシリンダボア壁の保温具（１）又は（２）の他の形態例としては、図１６に示す形態例の各シリンダボアのボア側の壁面に対応する部位毎に付設されている保温用ゴム部材が、更に、複数に分割されている形態例が挙げられる。このように、本発明のシリンダボア壁の保温具（１）又は（２）では、全ての保温用ゴム部材各ボア部が、連続していてもよいし、あるいは、連続していなくてもよい。そして、本発明のシリンダボア壁の保温具（１）又は（２）では、全ての保温用ゴム部材各ボア部が連続していることが、シリンダボア壁の保温具が、溝状冷却水流路内で、振動や冷却水の流れによる位置ずれを起こし難くなる点で好ましい。   In the embodiment shown in FIG. 4, the two heat retaining rubber member bore portions 36a and 36b are continuous, but the present invention is not limited to this. As another embodiment of the cylinder bore wall heat insulator (1) or (2) of the present invention, for example, as shown in the embodiment shown in FIG. 16, the heat insulating rubber member corresponds to the wall surface on the bore side of each cylinder bore. The form example divided | segmented for every site | part to perform is mentioned. Further, as another embodiment of the cylinder bore wall heat insulator (1) or (2) according to the present invention, the heat insulation provided for each portion corresponding to the wall surface on the bore side of each cylinder bore of the embodiment shown in FIG. The rubber member for use is further divided into a plurality of embodiments. As described above, in the warmer (1) or (2) of the cylinder bore wall according to the present invention, all the heat retaining rubber member bores may be continuous or may not be continuous. In the cylinder bore wall heat insulator (1) or (2) according to the present invention, it is confirmed that all the heat retaining rubber member bores are continuous in the grooved coolant flow path. It is preferable in that it is difficult to cause a position shift due to vibration or a flow of cooling water.

また、本発明のシリンダボア壁の保温具（３）では、保温用ゴム部材（１つの保温用ゴム部材各ボア部）が、一続きのものであってもよいし、あるいは、複数に分割されていてもよい。   Further, in the heat retaining device (3) for the cylinder bore wall according to the present invention, the heat retaining rubber member (one bore for each heat retaining rubber member) may be continuous or divided into a plurality of parts. May be.

なお、本発明のシリンダボア壁の保温具（１）、（２）又は（３）において、保温用ゴム部材は、溝状冷却水流路の中下部のシリンダボア側の壁面のうち、保温対象となる壁面（保温対象となる１つ、２つ又は３つのシリンダボアのボア壁の溝状冷却水流路側の壁面）の全て隈なく覆うものであってもよいし、あるいは、保温対象となる壁面の一部であって且つ保温のために必要な箇所のみを覆うものであってもよい。   In the cylinder bore wall heat retaining device (1), (2) or (3) of the present invention, the heat retaining rubber member is a wall surface to be heat retained among the wall surfaces on the cylinder bore side in the lower part of the grooved cooling water flow path. (The wall surface on the groove-like cooling water flow path side of the bore wall of one, two or three cylinder bores to be kept warm) may be covered completely, or may be a part of the wall surface to be kept warm. It is also possible to cover only a portion necessary for heat insulation.

本発明のシリンダボア壁の保温具（１）又は（２）では、金属基体部材は、２つ又は３つの金属基体部材各ボア部からなる。本発明において、金属基体部材各ボア部とは、各保温用ゴム部材各ボア部が固定される部位を指す。よって、本発明のシリンダボア壁の保温具（１）又は（２）では、保温対象が２つのシリンダボアのボア壁の場合、金属基体部材は、２つの金属基体部材各ボア部からなり、また、保温対象が３つのシリンダボアのボア壁の場合、金属基体部材は、３つの金属基体部材各ボア部からなる。各々の金属基体部材各ボア部には、それぞれ、保温用ゴム部材各ボア部が固定される。そして、金属基体部材においては、一端から他端までが繋がっている。図４に示す形態例では、金属基体部材は、一端から他端までが、１つの金属板で形成されているが、本発明は、これに限定されるものではなく、金属基体部材は、一端から他端までが繋がっていれば、１つの金属板で形成されたものであっても、複数の金属板が繋ぎ合わされたものであってもよい。   In the heat insulator (1) or (2) for the cylinder bore wall according to the present invention, the metal base member is composed of two or three metal base member bore portions. In the present invention, each bore portion of the metal base member refers to a portion to which each bore portion of each heat retaining rubber member is fixed. Therefore, in the cylinder bore wall heat retaining device (1) or (2) of the present invention, when the heat retaining object is the bore wall of two cylinder bores, the metal base member is composed of the bore portions of the two metal base members. When the object is a bore wall of three cylinder bores, the metal base member is composed of three bore portions of the three metal base members. Each bore portion of the heat retaining rubber member is fixed to each bore portion of each metal base member. In the metal base member, one end is connected to the other end. In the embodiment shown in FIG. 4, the metal base member is formed from one metal plate from one end to the other end. However, the present invention is not limited to this, and the metal base member has one end. As long as it is connected from the other end to the other end, it may be formed of one metal plate or a plurality of metal plates joined together.

また、本発明のシリンダボア壁の保温具（３）では、保温対象が１つのシリンダボアのボア壁の溝状冷却水流路側の壁面なので、金属基体部材は、１つの金属基体部材各ボア部からなる。そして、金属基体部材各ボア部には、保温用ゴム部材各ボア部が固定される。金属基体部材においては、一端から他端まで繋がっている。   Further, in the heat retaining tool (3) for the cylinder bore wall according to the present invention, since the heat retaining object is the wall surface on the grooved coolant flow path side of the bore wall of one cylinder bore, the metal base member is composed of one bore portion of one metal base member. And each bore part of the heat retaining rubber member is fixed to each bore part of the metal base member. The metal base member is connected from one end to the other end.

本発明のシリンダボア壁の保温具（１）、（２）又は（３）では、付勢兼背面側流れ抑制部材は、金属基体部材の各ボア部毎に、１つ以上付設されている。つまり、本発明のシリンダボア壁の保温具（１）、（２）又は（３）を上側から見たときに、各金属基体部材各ボア部毎に、円弧方向の少なくとも１箇所に、付勢兼背面側流れ抑制部材が付設されている。なお、図４に示すシリンダボア壁の保温具２０では、付勢兼背面側流れ抑制部材は、各金属基体部材各ボア部毎に、その円弧方向に１箇所付設されている。また、図１７に示す形態例では、付勢兼背面側流れ抑制部材は、各金属基体部材各ボア部毎に、その円弧方向に２箇所ずつ付設されている。   In the warmer (1), (2) or (3) of the cylinder bore wall according to the present invention, one or more urging / backside flow restraining members are provided for each bore portion of the metal base member. That is, when the heat insulating device (1), (2) or (3) of the cylinder bore wall according to the present invention is viewed from the upper side, the biasing and at least one place in the arc direction is provided for each bore portion of each metal base member. A back side flow restraining member is attached. Note that in the cylinder bore wall heat insulator 20 shown in FIG. 4, the urging and back side flow suppressing member is provided at one place in the arc direction for each of the bore portions of each metal base member. Further, in the embodiment shown in FIG. 17, the urging and back-side flow suppressing member is provided at two locations in the arc direction for each bore portion of each metal base member.

本発明のシリンダボア壁の保温具（１）、（２）又は（３）では、溝状冷却水流路の中下部に設置されたときに、付勢兼背面側流れ抑制部材により、保温用ゴム部材が適切な押し付け力で付勢され、且つ、金属基体部材の背面側と溝状冷却水流路の中下部のシリンダボア側の壁面とは反対側の壁面との間の冷却水流れが抑制されるように、溝状冷却水流路の形状等に合わせて、付勢兼背面側流れ抑制部材の材質、形状、大きさ、設置位置、設置数等が、適宜選択される。   In the heat retaining device (1), (2) or (3) for the cylinder bore wall according to the present invention, when installed in the middle lower part of the groove-like cooling water flow path, the heat retaining rubber member is provided by the urging and back side flow suppressing member. Is urged by an appropriate pressing force, and the flow of cooling water between the rear surface side of the metal base member and the wall surface on the opposite side of the wall surface on the cylinder bore side in the lower part of the grooved cooling water flow path is suppressed. In addition, the material, shape, size, installation position, number of installations, and the like of the urging and back flow suppressing member are appropriately selected in accordance with the shape of the grooved cooling water flow path.

また、本発明のシリンダボア壁の保温具としては、溝状冷却水流路の中下部のシリンダボア側の壁面に向かって、金属基体部材が保温用ゴム部材を押し付けるように付勢するための部材と、金属基体部材と溝状冷却水流路の中下部のシリンダボア側の壁面とは反対側の壁面との間の冷却水流れを抑制するための部材が、別々に付設されている形態がある。   Further, as a heat retaining tool for the cylinder bore wall of the present invention, a member for biasing the metal base member to press the rubber member for heat retention toward the wall surface on the cylinder bore side in the middle and lower part of the grooved cooling water flow path; There is a form in which members for suppressing the flow of cooling water between the metal base member and the wall surface on the opposite side to the wall surface on the cylinder bore side in the middle and lower part of the grooved cooling water flow path are separately provided.

図１８に、本発明のシリンダボア壁の保温具の他の形態例を示す。図１８（Ａ）は斜視図であり、図１８（Ｂ）は端面図である。図１８中、シリンダボア壁の保温具４０は、金属基体部材４１と、保温用ゴム部材４２と、冷却水流れ抑制樹脂部材４３と、金属板バネ部材４４と、からなる。図１８に示す形態例では、金属板バネ部材４４は、溶接側端４７が金属基体部材４１に溶接されることにより、付設されている。   FIG. 18 shows another example of the heat retaining device for the cylinder bore wall according to the present invention. 18A is a perspective view, and FIG. 18B is an end view. In FIG. 18, the heat retaining device 40 on the cylinder bore wall includes a metal base member 41, a heat retaining rubber member 42, a cooling water flow suppressing resin member 43, and a metal plate spring member 44. In the embodiment shown in FIG. 18, the metal leaf spring member 44 is attached by welding the welding side end 47 to the metal base member 41.

シリンダボア壁の保温具４０では、保温用ゴム部材４２の接触面４５から金属板バネ部材４４の一端側４６までの距離が、溝状冷却水流路の幅よりも大きくなるように、金属板バネ部材４４が付設されている。そのため、シリンダボア壁の保温具４０が、溝状冷却水流路の中下部に設置されると、金属板バネ部材４４が、金属基体部材４１及び保温用ゴム部材４２と溝状冷却水流路のシリンダボア側の壁面とは反対側の壁面との間に挟まれることにより、金属板バネ部材４４の一端側４６には、金属基体部材４１に向かう方向に力が加えられる。このことにより、金属板バネ部材４４は、一端側４６が金属基体部材４１側に近づくように変形するので、金属板バネ部材４４には、元に戻ろうとする弾性力が生じる。そして、この弾性力により、金属基体部材４１は、溝状冷却水流路のシリンダボア側の壁面に向かって押され、その結果、金属基体部材４１により、ゴム部材４２が、溝状冷却水流路のシリンダボア側の壁面に押し付けられる。つまり、シリンダボア壁の保温具４０が、溝状冷却水流路の中下部に設置されることにより、金属板バネ部材４４が変形し、その変形が戻ろうとして生じる弾性力により、保温用ゴム部材４２を溝状冷却水流路のシリンダボア側の壁面に押し付けるように、金属基体部材４１が付勢される。   In the heat retaining device 40 on the cylinder bore wall, the metal plate spring member is such that the distance from the contact surface 45 of the heat retaining rubber member 42 to the one end side 46 of the metal plate spring member 44 is larger than the width of the grooved cooling water flow path. 44 is attached. Therefore, when the heat insulator 40 on the cylinder bore wall is installed in the middle and lower part of the groove-shaped cooling water flow path, the metal plate spring member 44 is connected to the metal base member 41 and the heat retaining rubber member 42 and the cylinder bore side of the groove-shaped cooling water flow path. By being sandwiched between the wall surface opposite to the wall surface, a force is applied to the one end side 46 of the metal leaf spring member 44 in the direction toward the metal base member 41. As a result, the metal plate spring member 44 is deformed so that the one end side 46 approaches the metal base member 41 side, so that the metal plate spring member 44 has an elastic force to return. Then, by this elastic force, the metal base member 41 is pushed toward the wall surface on the cylinder bore side of the groove-like cooling water flow path, and as a result, the rubber member 42 is pushed by the metal base member 41 into the cylinder bore of the groove-like cooling water flow path. Pressed against the side wall. That is, by installing the heat insulator 40 on the cylinder bore wall in the lower part of the groove-like cooling water flow path, the metal plate spring member 44 is deformed, and the heat retaining rubber member 42 is generated by the elastic force generated when the deformation is returned. The metal base member 41 is urged so as to press against the wall surface on the cylinder bore side of the grooved cooling water flow path.

冷却水流れ抑制樹脂部材４３は、シリンダボア壁の保温具４０が、溝状冷却水流路の中下部に設置されたときに、金属基体部材４１と溝状冷却水流路の中下部のシリンダボア側の壁面とは反対側の壁面との間に流れる冷却水流れを抑制するための部材である。冷却水流れ抑制樹脂部材４３は、金属基体部材４１の背面と溝状冷却水流路の中下部の壁面（シリンダボア側とは反対側の壁面）との間を塞ぐように設置されるために、その間を冷却水が流れるのが抑制される。   The cooling water flow restraining resin member 43 has a wall surface on the cylinder bore side of the metal base member 41 and the lower part of the grooved cooling water flow path when the cylinder bore wall heat insulator 40 is installed in the lower part of the grooved cooling water flow path. It is a member for suppressing the cooling water flow which flows between wall surfaces on the opposite side. Since the cooling water flow suppressing resin member 43 is installed so as to block between the back surface of the metal base member 41 and the wall surface of the lower part of the grooved cooling water flow path (the wall surface opposite to the cylinder bore side), The cooling water is suppressed from flowing.

つまり、本発明の他の形態のシリンダボア壁の保温具は、シリンダボアを有する内燃機関のシリンダブロックの溝状冷却水流路の中下部に設置され、全シリンダボアのボア壁のうちの一部のボア壁を保温するためのシリンダボア壁の保温具であり、
溝状冷却水流路の中下部のシリンダボア側の全壁面のうちの１つのシリンダボアの壁面又は２つ以上のシリンダボアに亘る分の壁面に接触する保温用ゴム部材と、該保温用ゴム部材が固定される金属基体部材と、該金属基体部材の背面側に固定され、該溝状冷却水流路の中下部のシリンダボア側の壁面に向かって、該金属基体部材が該保温用ゴム部材を押し付けるように付勢する付勢部材と、該金属基体部材の背面側に固定され、該金属基体部材と溝状冷却水流路の中下部のシリンダボア側の壁面とは反対側の壁面との間の冷却水流れを抑制する背面側流れ抑制部材と、からなり、
該付勢部材が、該金属基体部材の各ボア部毎に、１つ以上付設されており、
該背面側流れ抑制部材が、１つ以上付設されていること、
を特徴するシリンダボア壁の保温具である。 In other words, the cylinder bore wall heat insulator according to another embodiment of the present invention is installed in the middle and lower part of the groove-like cooling water flow path of the cylinder block of the internal combustion engine having the cylinder bore, and is a part of the bore walls of all the cylinder bores. Is a cylinder bore wall heat insulator for keeping warm.
A heat retaining rubber member that is in contact with the wall surface of one cylinder bore or two or more cylinder bores among all the wall surfaces on the cylinder bore side in the middle and lower part of the grooved cooling water flow path, and the heat retaining rubber member are fixed A metal base member that is fixed to the back side of the metal base member, and is attached so that the metal base member presses the heat retaining rubber member toward the wall surface on the cylinder bore side in the lower part of the grooved cooling water flow path. A biasing member that is energized and a cooling water flow fixed between the metal base member and the wall surface on the opposite side of the wall surface on the cylinder bore side in the lower part of the groove-like cooling water flow path. A back side flow suppressing member for suppressing,
One or more of the urging members are attached to each bore portion of the metal base member,
That one or more back side flow restraining members are attached;
A cylinder bore wall heat insulator characterized by

本発明の第四の形態のシリンダボア壁の保温具（以下、本発明のシリンダボア壁の保温具（４）とも記載する。）は、４つ以上のシリンダボアを有する内燃機関のシリンダブロックの溝状冷却水流路の中下部に設置され、全シリンダボアのボア壁のうちの一部のボア壁を保温するためのシリンダボア壁の保温具であり、
溝状冷却水流路の中下部のシリンダボア側の全壁面のうちの２つ又は３つのシリンダボアに亘る分の壁面に接触する保温用ゴム部材と、該保温用ゴム部材が固定される金属基体部材と、該金属基体部材の背面側に固定され、該溝状冷却水流路の中下部のシリンダボア側の壁面に向かって、該金属基体部材が該保温用ゴム部材を押し付けるように付勢する付勢部材と、該金属基体部材の背面側に固定され、該金属基体部材と溝状冷却水流路の中下部のシリンダボア側の壁面とは反対側の壁面との間の冷却水流れを抑制する背面側流れ抑制部材と、からなり、
該付勢部材が、該金属基体部材の各ボア部毎に、１つ以上付設されており、
該背面側流れ抑制部材が、１つ以上付設されていること、
を特徴するシリンダボア壁の保温具である。 A cylinder bore wall heat retaining device (hereinafter also referred to as a cylinder bore wall heat retaining device (4) of the present invention) according to a fourth embodiment of the present invention is a groove-like cooling of a cylinder block of an internal combustion engine having four or more cylinder bores. A cylinder bore wall heat insulator that is installed in the lower part of the water flow path and heats a part of the bore walls of all the cylinder bores,
A heat insulating rubber member that contacts two or three cylinder bores of the entire wall surface on the cylinder bore side in the middle and lower part of the grooved cooling water flow path, and a metal base member to which the heat insulating rubber member is fixed A biasing member fixed to the back side of the metal base member and biasing the metal base member so as to press the heat retaining rubber member toward the wall surface on the cylinder bore side in the lower part of the grooved cooling water flow path And a back side flow that is fixed to the back side of the metal base member and suppresses the flow of cooling water between the metal base member and the wall surface on the opposite side of the wall surface on the cylinder bore side in the middle of the grooved cooling water flow path A restraining member,
One or more of the urging members are attached to each bore portion of the metal base member,
That one or more back side flow restraining members are attached;
A cylinder bore wall heat insulator characterized by

また、本発明の第五の形態のシリンダボア壁の保温具（以下、本発明のシリンダボア壁の保温具（５）とも記載する。）は、３つのシリンダボアを有する内燃機関のシリンダブロックの溝状冷却水流路の中下部に設置され、全シリンダボアのボア壁のうちの一部のボア壁を保温するためのシリンダボア壁の保温具であり、
溝状冷却水流路の中下部のシリンダボア側の全壁面のうちの２つのシリンダボアに亘る分の壁面に接触する保温用ゴム部材と、該保温用ゴム部材が固定される金属基体部材と、該金属基体部材の背面側に固定され、該溝状冷却水流路の中下部のシリンダボア側の壁面に向かって、該金属基体部材が該保温用ゴム部材を押し付けるように付勢する付勢部材と、該金属基体部材の背面側に固定され、該金属基体部材と溝状冷却水流路の中下部のシリンダボア側の壁面とは反対側の壁面との間の冷却水流れを抑制する背面側流れ抑制部材と、からなり、
該付勢部材が、該金属基体部材の各ボア部毎に、１つ以上付設されており、
該背面側流れ抑制部材が、１つ以上付設されていること、
を特徴するシリンダボア壁の保温具である。 A cylinder bore wall heat insulator (hereinafter also referred to as a cylinder bore wall heat insulator (5) of the present invention) according to a fifth embodiment of the present invention is a groove cooling of a cylinder block of an internal combustion engine having three cylinder bores. A cylinder bore wall heat insulator that is installed in the lower part of the water flow path and heats a part of the bore walls of all the cylinder bores,
A heat insulating rubber member that contacts two cylinder bores of all wall surfaces on the cylinder bore side in the middle and lower part of the grooved cooling water flow path, a metal base member to which the heat insulating rubber member is fixed, and the metal An urging member fixed to the back surface side of the base member and urged so that the metal base member presses the heat retaining rubber member toward the wall surface on the cylinder bore side in the lower part of the grooved cooling water flow path; A back side flow restraining member fixed to the back side of the metal base member and restraining a coolant flow between the metal base member and the wall surface on the opposite side of the wall surface on the cylinder bore side in the middle and lower part of the grooved cooling water flow path; Consists of
One or more of the urging members are attached to each bore portion of the metal base member,
That one or more back side flow restraining members are attached;
A cylinder bore wall heat insulator characterized by

また、本発明の第六の形態のシリンダボア壁の保温具（以下、本発明のシリンダボア壁の保温具（６）とも記載する。）は、２つ以上のシリンダボアを有する内燃機関のシリンダブロックの溝状冷却水流路の中下部に設置され、全シリンダボアのボア壁のうちの一部のボア壁を保温するためのシリンダボア壁の保温具であり、
溝状冷却水流路の中下部のシリンダボア側の全壁面のうちの１つのシリンダボアの壁面に接触する保温用ゴム部材と、該保温用ゴム部材が固定される金属基体部材と、該金属基体部材の背面側に固定され、該溝状冷却水流路の中下部のシリンダボア側の壁面に向かって、該金属基体部材が該保温用ゴム部材を押し付けるように付勢する付勢部材と、該金属基体部材の背面側に固定され、該金属基体部材と溝状冷却水流路の中下部のシリンダボア側の壁面とは反対側の壁面との間の冷却水流れを抑制する背面側流れ抑制部材と、からなり、
該付勢部材が、該金属基体部材の各ボア部毎に、１つ以上付設されており、
該背面側流れ抑制部材が、１つ以上付設されていること、
を特徴するシリンダボア壁の保温具である。 A cylinder bore wall heat retaining device (hereinafter also referred to as a cylinder bore wall heat retaining device (6) of the present invention) according to a sixth embodiment of the present invention is a groove in a cylinder block of an internal combustion engine having two or more cylinder bores. A cylinder bore wall heat insulator for heat retaining a part of the bore walls of all the cylinder bores.
A heat insulating rubber member that is in contact with the wall surface of one of the cylinder bores on the cylinder bore side in the middle and lower part of the grooved cooling water flow path; a metal base member to which the heat insulating rubber member is fixed; An urging member fixed to the back surface and urged so that the metal base member presses the heat retaining rubber member toward the wall surface on the cylinder bore side in the lower part of the groove-like cooling water flow path; and the metal base member A back side flow restraining member that restrains the coolant flow between the metal base member and the wall surface on the opposite side of the wall surface on the cylinder bore side in the middle and lower part of the groove-like cooling water flow path. ,
One or more of the urging members are attached to each bore portion of the metal base member,
That one or more back side flow restraining members are attached;
A cylinder bore wall heat insulator characterized by

本発明のシリンダボア壁の保温具（４）と本発明のシリンダボア壁の保温具（５）と本発明のシリンダボア壁の保温具（６）とは、保温具が設置されるシリンダブロックのシリンダボアの数が異なること及びゴム部材各ボア部の数が異なること以外は同様である。   The cylinder bore wall heat retaining device (4) of the present invention, the cylinder bore wall heat retaining device (5) of the present invention, and the cylinder bore wall heat retaining device (6) of the present invention are the number of cylinder bores of the cylinder block in which the heat retaining device is installed. This is the same except that the number of bore portions of the rubber member is different.

本発明のシリンダボア壁の保温具（４）、（５）又は（６）は、内燃機関のシリンダブロックの溝状冷却水流路の中下部に設置される。本発明のシリンダボア壁の保温具（４）が設置されるシリンダブロックは、シリンダボアが直列に４つ以上並んで形成されているオープンデッキ型のシリンダブロックであるので、２つの端ボアと２つ以上の中間ボアとからなるシリンダボアを有している。また、本発明のシリンダボア壁の保温具（５）が設置されるシリンダブロックは、シリンダボアが直列に３つ並んで形成されているオープンデッキ型のシリンダブロックであるので、２つの端ボアと１つの中間ボアとからなるシリンダボアを有している。本発明のシリンダボア壁の保温具（６）が設置されるシリンダブロックは、シリンダボアが直列に２つ以上並んで形成されているオープンデッキ型のシリンダブロックであるので、２つの端ボアからなるシリンダボア又は２つの端ボアと１つ以上の中間ボアとからなるシリンダボアを有している。   The cylinder bore wall heat insulator (4), (5) or (6) of the present invention is installed in the lower part of the grooved coolant flow path of the cylinder block of the internal combustion engine. The cylinder block on which the cylinder bore wall heat insulator (4) of the present invention is installed is an open deck type cylinder block in which four or more cylinder bores are arranged in series, so two end bores and two or more end bores are provided. The cylinder bore is composed of an intermediate bore. In addition, the cylinder block in which the cylinder bore wall heat insulator (5) of the present invention is installed is an open deck type cylinder block in which three cylinder bores are arranged in series. It has a cylinder bore consisting of an intermediate bore. The cylinder block in which the cylinder bore wall heat insulator (6) according to the present invention is installed is an open deck type cylinder block in which two or more cylinder bores are arranged in series, so that a cylinder bore consisting of two end bores or It has a cylinder bore consisting of two end bores and one or more intermediate bores.

本発明のシリンダボア壁の保温具（４）、（５）又は（６）が設置される位置は、溝状冷却水流路の中下部である。図２では、溝状冷却水流路１４の最上部９と最下部８の中間近傍の位置１０を、点線で示しているが、この中間近傍の位置１０から下側の溝状冷却水流路１４の部分を、溝状冷却水流路の中下部と呼ぶ。なお、溝状冷却水流路の中下部とは、溝状冷却水流路の最上部と最下部の丁度中間の位置から下の部分という意味ではなく、最上部と最下部の中間位置の近傍から下の部分という意味である。よって、溝状冷却水流路の最下部からどの位置までを本発明の保温具で保温するか、つまり、保温用ゴム部材の上端の位置を溝状冷却水流路の上下方向のどの位置にするかは、適宜選択される。   The position where the heat insulator (4), (5) or (6) is installed on the cylinder bore wall according to the present invention is the middle and lower part of the grooved coolant flow path. In FIG. 2, a position 10 near the middle between the uppermost part 9 and the lowermost part 8 of the groove-like cooling water flow path 14 is indicated by a dotted line, but the groove-like cooling water flow path 14 on the lower side from the position 10 near the middle is shown. This portion is referred to as the middle lower portion of the grooved cooling water flow path. The middle and lower part of the grooved cooling water flow path does not mean the part below the middle part between the uppermost part and the lowermost part of the grooved cooling water flow path. It means the part. Therefore, the position from the lowest part of the grooved cooling water flow path to the heat retaining device of the present invention, that is, the position of the upper end of the heat insulating rubber member in the vertical direction of the grooved cooling water flow path Is appropriately selected.

本発明のシリンダボア壁の保温具（４）、（５）又は（６）に係る保温用ゴム部材は、溝状冷却水流路の中下部のシリンダボア側の壁面に接することにより、シリンダボア壁の中下部を保温する部材である。そのため、この保温用ゴム部材の接触面側の形状は、溝状冷却水流路の中下部のシリンダボア側の壁面に沿う形状である。そして、本発明のシリンダボア壁の保温具（４）、（５）又は（６）が、溝状冷却水流路の中下部に設置されることにより、付勢部材が金属基体部材を押し、そのことにより、保温用ゴム部材は、接触面側（金属基体部材側とは反対側の面側）が、溝状冷却水流路の中下部のシリンダボア側の壁面に接し、押し付けられる。   The heat insulating rubber member according to the heat retaining tool (4), (5) or (6) of the cylinder bore wall according to the present invention is in contact with the wall surface on the cylinder bore side in the lower part of the grooved cooling water flow path, thereby Is a member that keeps the temperature. Therefore, the shape on the contact surface side of the heat retaining rubber member is a shape along the wall surface on the cylinder bore side in the middle and lower part of the grooved cooling water flow path. The cylinder bore wall heat insulator (4), (5) or (6) of the present invention is installed in the middle lower part of the groove-like cooling water flow path, so that the urging member pushes the metal base member, Thus, the heat retaining rubber member is pressed by the contact surface side (the surface side opposite to the metal base member side) being in contact with the wall surface on the cylinder bore side in the middle lower part of the grooved cooling water flow path.

本発明のシリンダボア壁の保温具（４）、（５）又は（６）に係る保温用ゴム部材の材質は、本発明のシリンダボア壁の保温具（１）、（２）又は（３）に係る保温用ゴム部材と同様である。   The material for the heat insulating rubber member according to the cylinder bore wall heat insulator (4), (5) or (6) of the present invention relates to the cylinder bore wall heat insulator (1), (2) or (3) of the present invention. It is the same as the rubber member for heat insulation.

保温用ゴム部材の厚みは、特に制限されず、適宜選択される。   The thickness of the heat insulating rubber member is not particularly limited and is appropriately selected.

金属基体部材は、保温用ゴム部材、付勢部材及び流れ抑制部材が固定される部材である。この金属基体部材は、付勢部材による付勢力により押されることにより、保温用ゴム部材を溝状冷却水流路の中下部のシリンダボア側の壁面に均一に押し付ける部材である。そのため、金属基体部材の形状は、保温用ゴム部材の背面側（接触面とは反対側の面側）に沿う形状である。   The metal base member is a member to which the heat retaining rubber member, the urging member, and the flow suppressing member are fixed. The metal base member is a member that uniformly presses the heat retaining rubber member against the wall surface on the cylinder bore side in the lower part of the grooved cooling water flow path by being pressed by the urging force of the urging member. Therefore, the shape of the metal base member is a shape along the back side (the surface side opposite to the contact surface) of the heat retaining rubber member.

本発明のシリンダボア壁の保温具（４）、（５）又は（６）に係る金属基体部材の材質は、本発明のシリンダボア壁の保温具（１）、（２）又は（３）に係る金属基体部材の材質と同様である。   The material of the metal base member according to the cylinder bore wall heat insulator (4), (5) or (6) of the present invention is the metal according to the cylinder bore wall heat retainer (1), (2) or (3) of the present invention. This is the same as the material of the base member.

付勢部材は、金属基体部材の背面側に固定されている。この付勢部材は、本発明のシリンダボア壁の保温具が溝状冷却水流路の中下部に設置されることにより、溝状冷却水流路の中下部のシリンダボア側の壁面に向かって、金属基体部材が保温用ゴム部材を押し付けるように付勢するための部材である。なお、金属基体部材の背面側とは、保温用ゴム部材が固定される面とは反対側を指す。   The biasing member is fixed to the back side of the metal base member. This urging member has a metal base member toward the cylinder bore side wall surface in the lower part of the grooved cooling water flow path when the cylinder bore wall heat insulator of the present invention is installed in the lower part of the grooved cooling water flow path. Is a member for energizing the heat retaining rubber member so as to press it. The back side of the metal base member refers to the side opposite to the surface on which the heat retaining rubber member is fixed.

付勢部材としては、金属板バネ、コイルバネ、重ね板バネ、トーションバネ等の金属弾性部材や、弾性ゴム等が挙げられる。金属弾性部材の材質は、特に制限されないが、耐ＬＬＣ性が良く及び強度が高い点で、ステンレス鋼（ＳＵＳ）、アルミニウム合金等が好ましい。弾性ゴムとしては、特に制限されないが、ソリッドゴム、膨張ゴム、発泡ゴム、軟性ゴム等のゴムや、シリコーン系ゲル状素材等が挙げられる。本発明のシリンダボア壁の保温具（４）、（５）又は（６）に係るソリッドゴム、膨張ゴム、発泡ゴム、軟性ゴム等のゴム、シリコーン系ゲル状素材は、本発明のシリンダボア壁の保温具（１）、（２）又は（３）における保温用ゴム部材に係るソリッドゴム、膨張ゴム、発泡ゴム、軟性ゴム等のゴム、シリコーン系ゲル状素材と同様である。付勢部材を金属基体部材に付設する方法としては、特に制限されず、例えば、図１８に示す形態例のように、付勢部材４４を、金属基体部材４１に直接固定する方法や、図２１に示す形態例のように、縦長の矩形の付勢部材５３が形成されるように、切り落とし部分５２が切り落とされている付勢部材付設用部材５４を作製し、これを金属基体部材４１に重ね合わせて、折り曲げ部５５を折り曲げることにより、ゴム部材４２に金属基体部材４１側から付勢部材５３を固定して、金属基体部材に付勢部材を付設する方法が挙げられる。なお、図１８（Ａ）は斜視図であり、図１８（Ｂ）は図１８（Ａ）のＡ−Ａ線端面図である。   Examples of the urging member include metal elastic members such as a metal leaf spring, a coil spring, a laminated leaf spring, and a torsion spring, and elastic rubber. The material of the metal elastic member is not particularly limited, but stainless steel (SUS), aluminum alloy, and the like are preferable in terms of good LLC resistance and high strength. The elastic rubber is not particularly limited, and examples thereof include solid rubber, expanded rubber, foamed rubber, soft rubber and other rubbers, and silicone-based gel materials. The cylinder bore wall heat insulator (4), (5) or (6) of the present invention is a solid rubber, expanded rubber, foam rubber, soft rubber, or other rubber, or a silicone-based gel-like material. It is the same as the rubber such as solid rubber, expanded rubber, foamed rubber, and soft rubber, and the silicone-based gel material related to the heat retaining rubber member in the tool (1), (2) or (3). The method of attaching the urging member to the metal base member is not particularly limited. For example, as in the embodiment shown in FIG. 18, a method of directly fixing the urging member 44 to the metal base member 41, or FIG. The urging member attaching member 54 in which the cut-off portion 52 is cut off is produced so that the vertically long urging member 53 is formed as shown in FIG. In addition, there is a method of fixing the urging member 53 to the rubber member 42 from the metal base member 41 side by bending the bent portion 55 and attaching the urging member to the metal base member. 18A is a perspective view, and FIG. 18B is an end view taken along line AA in FIG. 18A.

本発明のシリンダボア壁の保温具（４）、（５）又は（６）では、付勢部材は、金属基体部材各ボア部毎に、１つ以上付設されている。つまり、本発明のシリンダボア壁の保温具（４）、（５）又は（６）を上側から見たときに、各金属基体部材各ボア部毎に、その円弧方向の少なくとも１箇所に、付勢部材が付設されている。   In the heat insulator (4), (5), or (6) of the cylinder bore wall according to the present invention, one or more urging members are provided for each bore portion of the metal base member. That is, when the heat insulator (4), (5) or (6) of the cylinder bore wall according to the present invention is viewed from the upper side, the urging force is applied to at least one place in the arc direction for each bore portion of each metal base member. Members are attached.

付勢部材の形態、材質、形状、大きさ、設置位置、設置数等は、保温用ゴム部材が適切な押し付け力で付勢されるように、溝状冷却水流路の形状等に合わせて、適宜選択される。   The form, material, shape, size, installation position, number of installation, etc. of the urging member are adjusted to the shape of the grooved cooling water flow path so that the heat insulating rubber member is urged with an appropriate pressing force, It is selected appropriately.

背面側流れ抑制部材は、金属基体部材の背面側に固定されている。この背面側流れ抑制部材は、本発明のシリンダボア壁の保温具が溝状冷却水流路の中下部に設置されることにより、金属基体部材と溝状冷却水流路の中下部のシリンダボア側の壁面とは反対側の壁面との間を流れる冷却水流れを抑制するための部材である。   The back side flow suppressing member is fixed to the back side of the metal base member. This back side flow restricting member is provided with a metal base member and a wall surface on the cylinder bore side in the middle and lower part of the grooved cooling water flow path by installing the heat insulator for the cylinder bore wall of the present invention in the lower part of the grooved cooling water flow path. Is a member for suppressing the flow of cooling water flowing between the opposite wall surfaces.

背面側流れ抑制部材は、特に制限されず、ゴム、樹脂、金属板等が挙げられる。背面側流れ抑制部材としては、ゴム、樹脂が好ましい。背面側流れ抑制部材の形状は、本発明のシリンダボア壁の保温具が、溝状冷却水流路の中下部に設置された時に、金属基体部材の背面側と溝状冷却水流路の中下部のシリンダボア側の壁面とは反対側の壁面との間の冷却水流れを抑制できる形状であれば、特に制限されない。   The back side flow suppressing member is not particularly limited, and examples thereof include rubber, resin, and metal plate. The back side flow suppressing member is preferably rubber or resin. The shape of the back side flow restricting member is such that when the heat insulator for the cylinder bore wall of the present invention is installed in the middle and lower part of the grooved cooling water flow path, If it is a shape which can suppress the cooling water flow between the wall surface on the opposite side to the wall surface on the side, it will not be restrict | limited.

背面側流れ抑制部材は、本発明のシリンダボア壁の保温具（４）、（５）又は（６）を上から見たときに、冷却水流れ方向の一か所以上に金属基体部材の背面側に設置されている。つまり、金属基体部材の一端から他端までのどこか一か所又は二か所以上に、冷却水の流路を塞ぐように、背面側流れ抑制部材が設置されている。そして、本発明のシリンダボア壁の保温具（４）、（５）又は（６）では、背面側流れ抑制部材が、金属基体部材の各ボア部毎に、１つ以上付設されていることが、好ましい。   The back side flow restraining member is located on the back side of the metal base member at one or more locations in the cooling water flow direction when the cylinder bore wall heat insulator (4), (5) or (6) of the present invention is viewed from above. Is installed. That is, the back-side flow restricting member is installed at one place or two or more places from one end to the other end of the metal base member so as to block the cooling water flow path. And in the warmer (4), (5) or (6) of the cylinder bore wall according to the present invention, one or more back side flow suppression members are attached to each bore portion of the metal base member. preferable.

背面側流れ抑制部材の形態、材質、形状、大きさ、設置位置、設置数等は、冷却水の流れが抑制されるように、溝状冷却水流路の形状等に合わせて、適宜選択される。   The form, material, shape, size, installation position, number of installations, etc. of the back side flow suppressing member are appropriately selected according to the shape of the grooved cooling water flow path so that the cooling water flow is suppressed. .

本発明のシリンダボア壁の保温具（４）又は（５）では、保温対象が隣り合う２つのシリンダボアのボア壁、すなわち、２つのシリンダボアに亘る分のボア壁の場合、保温用ゴム部材は、シリンダボアのボア壁の溝状冷却水流路側の全壁面（すなわち、溝状冷却水流路のシリンダボア側の全壁面）のうち、その２つのシリンダボアに亘る分のボア壁の壁面（すなわち、その２つのシリンダボアに亘る分の溝状冷却水流路のシリンダボア側の壁面）且つ中下部の壁面と接触し、また、保温対象が連続して並ぶ３つのシリンダボアのボア壁、すなわち、３つのシリンダボアに亘る分のボア壁の場合、保温用ゴム部材は、シリンダボアのボア壁の溝状冷却水流路側の全壁面（すなわち、溝状冷却水流路のシリンダボア側の全壁面）のうち、その３つのシリンダボアに亘る分のボア壁の壁面（すなわち、その３つのシリンダボアに亘る分の溝状冷却水流路のシリンダボア側の壁面）且つ中下部の壁面と接触する。よって、本発明のシリンダボア壁の保温具（４）又は（５）では、保温対象が２つのシリンダボアのボア壁の場合、保温用ゴム部材は、２つの保温用ゴム部材各ボア部からなり、また、保温対象が３つのシリンダボアのボア壁の場合、保温用ゴム部材は、３つの保温用ゴム部材各ボア部からなる。そして、本発明のシリンダボア壁の保温具（４）又は（５）が設置される位置、言い換えると、保温用ゴム部材が接触する溝状冷却水流路の中下部のシリンダボア側の壁面は、一端の端ボア側の壁面、他端の端ボア側の壁面、又は中間ボア側の壁面である。本発明のシリンダボア壁の保温具（４）又は（５）において、保温用ゴム部材は、一端の端ボア側の壁面、他端の端ボア側の壁面及び中間ボア側の壁面の各壁面のうちの２つ又は３つに接触する部位を有している。また、本発明のシリンダボア壁の保温具（６）では、保温対象が１つのシリンダボアのボア壁であるので、保温用ゴム部材は、シリンダボアのボア壁の溝状冷却水流路側の全壁面（すなわち、溝状冷却水流路のシリンダボア側の全壁面）のうち、その１つのシリンダボアのボア壁の壁面（すなわち、その１つのシリンダボアの溝状冷却水流路のシリンダボア側の壁面）且つ中下部の壁面と接触する。本発明のシリンダボア壁の保温具（６）では、保温用ゴム部材は、１つの保温用ゴム部材各ボア部からなる。そして、本発明のシリンダボア壁の保温具（６）が設置される位置、言い換えると、保温用ゴム部材が接触する溝状冷却水流路の中下部のシリンダボア側の壁面は、一端の端ボア側の壁面、他端の端ボア側の壁面、又は中間ボア側の壁面である。本発明のシリンダボア壁の保温具（６）において、保温用ゴム部材は、一端の端ボア側の壁面、他端の端ボア側の壁面及び中間ボア側の壁面の各壁面のうちの１つに接触する部位を有している。   In the cylinder bore wall heat retaining device (4) or (5) of the present invention, in the case of the bore walls of two cylinder bores adjacent to each other, that is, the bore wall extending over the two cylinder bores, the heat retaining rubber member is a cylinder bore. Among the entire wall surface of the bore wall on the grooved cooling water flow channel side (that is, the entire wall surface on the cylinder bore side of the grooved cooling water flow channel), the wall surface of the bore wall that extends over the two cylinder bores (that is, the two cylinder bores) The bore wall of the three cylinder bores that are in contact with the wall surface on the cylinder bore side of the grooved cooling water flow path) and the middle and lower wall surfaces, and in which the heat insulation objects are continuously arranged, that is, the bore wall that extends over the three cylinder bores In this case, the temperature retaining rubber member includes three of the wall surfaces on the grooved cooling water flow path side of the bore wall of the cylinder bore (that is, all wall surfaces on the cylinder bore side of the grooved cooling water flow path). Wall surface of minute bore wall over the cylinder bore (i.e., the cylinder bore wall surfaces of the minute groove-like cooling water passage over its three cylinder bores) in contact with and middle bottom wall. Therefore, in the cylinder bore wall heat retaining device (4) or (5) of the present invention, when the heat retaining object is the bore wall of two cylinder bores, the heat retaining rubber member is composed of the two heat retaining rubber member bore portions, and When the heat retaining object is the bore wall of three cylinder bores, the heat retaining rubber member is composed of the three heat retaining rubber member bore portions. The position of the cylinder bore wall heat insulator (4) or (5) of the present invention, in other words, the wall surface on the cylinder bore side in the middle and lower part of the grooved cooling water flow path with which the heat insulating rubber member contacts is at one end. The wall surface on the end bore side, the wall surface on the end bore side on the other end, or the wall surface on the intermediate bore side. In the cylinder bore wall heat insulator (4) or (5) according to the present invention, the heat insulating rubber member is formed of the wall surface on the end bore side at one end, the wall surface on the end bore side on the other end, and the wall surface on the intermediate bore side. It has the site | part which contacts 2 or 3 of these. Further, in the heat retaining device (6) for the cylinder bore wall according to the present invention, since the heat retaining object is the bore wall of one cylinder bore, the heat retaining rubber member is the entire wall surface on the grooved coolant flow channel side of the bore wall of the cylinder bore (that is, Of all the wall surfaces on the cylinder bore side of the grooved cooling water flow path, the wall surface of the bore wall of that one cylinder bore (that is, the wall surface on the cylinder bore side of the groove cooling water flow path of that one cylinder bore) and the middle and lower wall surfaces To do. In the heat retaining tool (6) for the cylinder bore wall according to the present invention, the heat retaining rubber member is composed of one bore portion for each heat retaining rubber member. The cylinder bore wall heat retaining device (6) according to the present invention is installed at the position, in other words, the wall surface on the cylinder bore side in the lower part of the grooved cooling water flow path where the rubber member for heat insulation contacts is located on the end bore side of one end. A wall surface, a wall surface on the end bore side of the other end, or a wall surface on the intermediate bore side. In the heat insulator (6) for the cylinder bore wall according to the present invention, the heat retaining rubber member is attached to one of the wall surfaces on the end bore side, the end bore side on the other end, and the wall surface on the intermediate bore side on the other end. It has the part which contacts.

本発明のシリンダボア壁の保温具（４）又は（５）では、全ての保温用ゴム部材各ボア部が、連続していてもよいし、あるいは、連続していなくてもよい。そして、本発明のシリンダボア壁の保温具（４）又は（５）では、全ての保温用ゴム部材各ボア部が連続していることが、シリンダボア壁の保温具が、溝状冷却水流路内で、振動や冷却水の流れによる位置ずれを起こし難くなる点で好ましい。   In the heat retaining tool (4) or (5) for the cylinder bore wall according to the present invention, all the heat retaining rubber member bore portions may be continuous or may not be continuous. In the cylinder bore wall heat insulator (4) or (5) according to the present invention, it is confirmed that all the heat insulating rubber member bores are continuous, and that the cylinder bore wall heat insulator is within the groove-shaped cooling water flow path. It is preferable in that it is difficult to cause a position shift due to vibration or a flow of cooling water.

また、本発明のシリンダボア壁の保温具（６）では、保温用ゴム部材（１つの保温用ゴム部材各ボア部）が、一続きのものであってもよいし、あるいは、複数に分割されていてもよい。   Further, in the heat retaining device (6) for the cylinder bore wall according to the present invention, the heat retaining rubber member (one bore for each heat retaining rubber member) may be continuous or divided into a plurality of parts. May be.

なお、本発明のシリンダボア壁の保温具（４）、（５）又は（６）において、保温用ゴム部材は、溝状冷却水流路の中下部のシリンダボア側の壁面のうち、保温対象となる壁面（保温対象となる１つ、２つ又は３つのシリンダボアのボア壁の溝状冷却水流路側の壁面）の全て隈なく覆うものであってもよいし、あるいは、保温対象となる壁面の一部であって且つ保温のために必要な箇所のみを覆うものであってもよい。   In the cylinder bore wall heat retaining device (4), (5) or (6) of the present invention, the heat retaining rubber member is a wall surface to be heat retained among the wall surfaces on the cylinder bore side in the lower part of the grooved cooling water flow path. (The wall surface on the groove-like cooling water flow path side of the bore wall of one, two or three cylinder bores to be kept warm) may be covered completely, or may be a part of the wall surface to be kept warm. It is also possible to cover only a portion necessary for heat insulation.

本発明のシリンダボア壁の保温具（４）又は（５）では、金属基体部材は、２つ又は３つの金属基体部材各ボア部からなる。よって、本発明のシリンダボア壁の保温具（４）又は（５）では、保温対象が２つのシリンダボアのボア壁の場合、金属基体部材は、２つの金属基体部材各ボア部からなり、また、保温対象が３つのシリンダボアのボア壁の場合、金属基体部材は、３つの金属基体部材各ボア部からなる。各々の金属基体部材各ボア部には、それぞれ、保温用ゴム部材各ボア部が固定される。そして、金属基体部材においては、一端から他端までが繋がっている。金属基体部材は、一端から他端までが繋がっていれば、１つの金属板で形成されたものであっても、複数の金属板が繋ぎ合わされたものであってもよい。   In the heat retaining device (4) or (5) for the cylinder bore wall according to the present invention, the metal base member is composed of two or three metal base member bore portions. Therefore, in the cylinder bore wall heat retaining device (4) or (5) of the present invention, when the heat retaining object is the bore wall of two cylinder bores, the metal base member is composed of the bore portions of the two metal base members. When the object is a bore wall of three cylinder bores, the metal base member is composed of three bore portions of the three metal base members. Each bore portion of the heat retaining rubber member is fixed to each bore portion of each metal base member. In the metal base member, one end is connected to the other end. As long as the metal base member is connected from one end to the other end, the metal base member may be formed of one metal plate or a plurality of metal plates connected together.

また、本発明のシリンダボア壁の保温具（６）では、保温対象が１つのシリンダボアのボア壁の溝状冷却水流路側の壁面なので、金属基体部材は、１つの金属基体部材各ボア部からなる。そして、金属基体部材各ボア部には、ゴム部材各ボア部が固定される。金属基体部材においては、一端から他端まで繋がっている。   Further, in the heat retaining tool (6) for the cylinder bore wall according to the present invention, since the heat retaining object is the wall surface on the groove-like cooling water flow path side of the bore wall of one cylinder bore, the metal base member is composed of one bore portion of one metal base member. The respective bore portions of the rubber member are fixed to the respective bore portions of the metal base member. The metal base member is connected from one end to the other end.

本発明のシリンダボア壁の保温具（１）、（２）、（３）、（４）、（５）又は（６）は、溝状冷却水流路の中下部のどの位置に設置されるか、言い換えると、全シリンダボアのボア壁のうち、どのシリンダボアのボア壁の保温用として用いられるかは、適宜選択される。図９では、中間ボア１２ｂ１のボア壁１３ｂ１及び中間ボア１２ｂ２のボア壁１３ｂ２が保温されるように、シリンダボア壁の保温具２０が、溝状冷却水流路１４の中下部に設置されているが、他には、図１９及び図２０に示す形態例が挙げられる。図１９では、端ボア１２ａ１のボア壁１３ａ１及び中間ボア１２ｂ１のボア壁１３ｂ１が保温されるように、シリンダボア壁の保温具３０が、溝状冷却水流路１４の中下部に設置されており、また、図２０では、端ボア１２ａ１のボア壁１３ａ１、中間ボア１２ｂ１のボア壁１３ｂ１及び中間ボア１２ｂ２のボア壁１３ｂ２が保温されるように、シリンダボア壁の保温具３１が、溝状冷却水流路１４の中下部に設置されている。   In which position the heat retaining device (1), (2), (3), (4), (5) or (6) of the cylinder bore wall of the present invention is installed in the lower part of the grooved cooling water flow path, In other words, of the bore walls of all the cylinder bores, which cylinder bore is used for heat insulation is appropriately selected. In FIG. 9, the warmer 20 of the cylinder bore wall is installed in the middle and lower part of the grooved cooling water flow path 14 so that the bore wall 13b1 of the intermediate bore 12b1 and the bore wall 13b2 of the intermediate bore 12b2 are kept warm. In addition, the example shown in FIG.19 and FIG.20 is mentioned. In FIG. 19, the warmer 30 on the cylinder bore wall is installed in the middle and lower part of the grooved cooling water channel 14 so that the bore wall 13a1 of the end bore 12a1 and the bore wall 13b1 of the intermediate bore 12b1 are kept warm. In FIG. 20, the warmer 31 of the cylinder bore wall is provided in the groove-shaped cooling water flow path 14 so that the bore wall 13a1 of the end bore 12a1, the bore wall 13b1 of the intermediate bore 12b1, and the bore wall 13b2 of the intermediate bore 12b2 are kept warm. It is installed in the middle and lower part.

本発明の内燃機関は、溝状冷却水流路の中下部に、本発明のシリンダボア壁の保温具（１）、（２）、（３）、（４）、（５）又は（６）が設置されていることを特徴とする内燃機関である。本発明の内燃機関において、本発明のシリンダボア壁の保温具が設置されている箇所は、溝状冷却水流路の中下部のうち、保温が必要とされる箇所である。つまり、本発明の内燃機関では、保温が必要な箇所に、選択的に、本発明のシリンダボア壁の保温具が設置されている。   In the internal combustion engine of the present invention, the heat insulator (1), (2), (3), (4), (5) or (6) of the cylinder bore wall of the present invention is installed in the middle and lower part of the groove-like cooling water flow path. The internal combustion engine is characterized by the above. In the internal combustion engine of the present invention, the location where the cylinder bore wall heat retaining device of the present invention is installed is a location where heat insulation is required in the middle and lower part of the grooved coolant flow path. That is, in the internal combustion engine of the present invention, the cylinder bore wall heat retaining device of the present invention is selectively installed at a place where heat insulation is necessary.

本発明の自動車は、本発明の内燃機関を有することを特徴とする自動車である。   The automobile of the present invention is an automobile having the internal combustion engine of the present invention.

従来の溝状冷却水流路の中下部のシリンダボア側の全壁面を囲むように保温部が形成されている保温具の場合、保温が必要な箇所のみを選択的に保温するようなことはできない。   In the case of a heat retaining device in which a heat retaining part is formed so as to surround the entire wall surface on the cylinder bore side in the middle and lower part of the conventional grooved cooling water flow path, it is not possible to selectively retain only the portions that require heat retaining.

それに対して、本発明のシリンダボア壁の保温具（１）、（２）、（３）、（４）、（５）又は（６）では、保温が必要な箇所のみを選択的に保温できる。また、本発明のシリンダボア壁の保温具（１）、（２）、（４）又は（５）では、付勢兼背面流れ抑制部材又は付勢部材が、金属基体部材の各ボア部毎に、１つ以上付設されているので、ゴム部材が、保温対象となる溝状冷却水流路の中下部のシリンダボア側の壁面に、まんべんなく押し付けられる。更に、本発明のシリンダボア壁の保温具（１）、（２）、（４）又は（５）では、金属基体部材が、各ボア部毎に分断されているのではなく、全てが繋がっているので、本発明のシリンダボア壁の保温具（１）、（２）、（４）又は（５）は、溝状冷却水流路内で、振動や冷却水の流れによる位置ずれを起こし難い。   On the other hand, in the warmer (1), (2), (3), (4), (5) or (6) of the cylinder bore wall according to the present invention, it is possible to selectively keep only the portions that need to be kept warm. Further, in the cylinder bore wall heat insulator (1), (2), (4) or (5) of the present invention, the urging and back flow suppressing member or the urging member is provided for each bore portion of the metal base member. Since one or more are attached, the rubber member is evenly pressed against the wall surface on the cylinder bore side in the lower part of the grooved coolant flow path to be kept warm. Furthermore, in the cylinder bore wall heat insulator (1), (2), (4) or (5) of the present invention, the metal base member is not divided for each bore part, but all are connected. Therefore, the cylinder bore wall heat insulator (1), (2), (4) or (5) of the present invention is less likely to be displaced due to vibration or the flow of cooling water in the grooved cooling water flow path.

本発明によれば、内燃機関のシリンダボア壁の上側と下側との変形量の違いを少なくすることができるので、ピストンの摩擦を低くすることができるため、省燃費の内燃機関を提供できる。   According to the present invention, since the difference in deformation amount between the upper side and the lower side of the cylinder bore wall of the internal combustion engine can be reduced, the friction of the piston can be reduced, so that a fuel-saving internal combustion engine can be provided.

８ 最下部
９ 最上部
１０ 中間近傍の位置
１１ シリンダブロック
１２ ボア
１２ａ１、１２ａ２ 端ボア
１２ｂ１、１２ｂ２ 中間ボア
１３ シリンダボア壁
１４ 溝状冷却水流路
１５ 冷却水供給口
１６ 冷却水排出口
１７ 溝状冷却水流路のシリンダボア側の壁面
１７ａ、１７ｂ 溝状冷却水流路のシリンダボア側の全壁面のうち、片側半分側の壁面
１８ 溝状冷却水流路のシリンダボア側の壁面とは反対側の壁面
２０、４０ シリンダボア壁の保温具
２１、４１ 金属基体部材
２２、４２ 保温用ゴム部材
２３ 背面側ゴム部材
２４ 折り曲げ部
２５、２６、４５ 接触面
３０ 金属板
３１ 切り落とし部分
３３、３４ 背面
３５ 保温用ゴム部材端ボア部
３６ 保温用ゴム部材中間ボア部
３７ 金属基体部材端ボア部
３８ 金属基体部材中間ボア部
４３ 背面側流れ抑制部材
４４ 付勢部材
４６ 一端
４７ 溶接側端 8 Lowermost part 9 Uppermost part 10 Middle position 11 Cylinder block 12 Bore 12a1, 12a2 End bore 12b1, 12b2 Intermediate bore 13 Cylinder bore wall 14 Grooved cooling water flow path 15 Cooling water supply port 16 Cooling water discharge port 17 Grooved cooling water flow Wall surfaces 17a and 17b on the cylinder bore side of the passage Out of all wall surfaces on the cylinder bore side of the groove-shaped cooling water flow path, wall surfaces 20 and 40 on the opposite side to the wall surface on the cylinder bore side of the half-hole wall 18 on the one side Thermal insulation members 21 and 41 Metal base member 22 and 42 Thermal insulation rubber member 23 Back side rubber member 24 Bending parts 25, 26 and 45 Contact surface 30 Metal plate 31 Cut-off parts 33 and 34 Rear side 35 Thermal insulation rubber member end bore part 36 Heat retaining rubber member intermediate bore portion 37 Metal base member end bore portion 38 Metal base member intermediate bore portion 43 Back side flow restraint Member 44 Biasing member 46 One end 47 Weld side end

Claims (10)

シリンダボアを有する内燃機関のシリンダブロックの溝状冷却水流路の中下部に設置され、全シリンダボアのボア壁のうちの一部のボア壁を保温するためのシリンダボア壁の保温具であり、
溝状冷却水流路の中下部のシリンダボア側の全壁面のうちの１つのシリンダボアの壁面又は２つ以上のシリンダボアに亘る分の壁面に接触する保温用ゴム部材と、該保温用ゴム部材が固定される金属基体部材と、該金属基体部材の背面側に固定され、該溝状冷却水流路の中下部のシリンダボア側の壁面に向かって、該金属基体部材が該保温用ゴム部材を押し付けるように付勢すると共に、該金属基体部材と溝状冷却水流路の中下部のシリンダボア側の壁面とは反対側の壁面との間の冷却水流れを抑制する付勢兼背面側流れ抑制部材と、からなり、
該付勢兼背面側流れ抑制部材が、該金属基体部材の各ボア部毎に、１つ以上付設されていること、
を特徴するシリンダボア壁の保温具。 A cylinder bore wall heat insulator that is installed in the middle and lower part of the groove-like cooling water flow path of the cylinder block of the internal combustion engine having the cylinder bore, and that keeps a part of the bore walls of the cylinder bores,
A heat retaining rubber member that is in contact with the wall surface of one cylinder bore or two or more cylinder bores among all the wall surfaces on the cylinder bore side in the middle and lower part of the grooved cooling water flow path, and the heat retaining rubber member are fixed A metal base member that is fixed to the back side of the metal base member, and is attached so that the metal base member presses the heat retaining rubber member toward the wall surface on the cylinder bore side in the lower part of the grooved cooling water flow path. And a biasing and back side flow suppressing member that suppresses cooling water flow between the metal base member and the wall surface on the opposite side to the wall surface on the cylinder bore side in the middle and lower part of the grooved cooling water flow path. ,
One or more of the biasing and back side flow suppressing members are provided for each bore portion of the metal base member;
Cylinder bore wall thermal insulation. ４つ以上のシリンダボアを有する内燃機関のシリンダブロックの溝状冷却水流路の中下部に設置され、全シリンダボアのボア壁のうちの一部のボア壁を保温するためのシリンダボア壁の保温具であり、
溝状冷却水流路の中下部のシリンダボア側の全壁面のうちの２つ又は３つのシリンダボアに亘る分の壁面に接触する保温用ゴム部材と、該保温用ゴム部材が固定される金属基体部材と、該金属基体部材の背面側に固定され、該溝状冷却水流路の中下部のシリンダボア側の壁面に向かって、該金属基体部材が該保温用ゴム部材を押し付けるように付勢すると共に、該金属基体部材と溝状冷却水流路の中下部のシリンダボア側の壁面とは反対側の壁面との間の冷却水流れを抑制する付勢兼背面側流れ抑制部材と、からなり、
該付勢兼背面側流れ抑制部材が、該金属基体部材の各ボア部毎に、１つ以上付設されていること、
を特徴する請求項１記載のシリンダボア壁の保温具。 A cylinder bore wall heat insulator that is installed in the middle and lower part of a groove-like cooling water flow path of a cylinder block of an internal combustion engine having four or more cylinder bores, and that keeps a part of the bore walls of all the cylinder bores. ,
A heat insulating rubber member that contacts two or three cylinder bores of the entire wall surface on the cylinder bore side in the middle and lower part of the grooved cooling water flow path, and a metal base member to which the heat insulating rubber member is fixed The metal base member is fixed to the back side of the metal base member, and urges the metal base member to press the heat insulating rubber member toward the wall surface on the cylinder bore side in the lower part of the grooved cooling water flow path, An urging and back side flow suppressing member that suppresses the flow of cooling water between the metal base member and the wall surface on the opposite side to the wall surface on the cylinder bore side in the middle and lower part of the grooved cooling water flow path,
One or more of the biasing and back side flow suppressing members are provided for each bore portion of the metal base member;
The heat insulating device for a cylinder bore wall according to claim 1, wherein: ３つのシリンダボアを有する内燃機関のシリンダブロックの溝状冷却水流路の中下部に設置され、全シリンダボアのボア壁のうちの一部のボア壁を保温するためのシリンダボア壁の保温具であり、
溝状冷却水流路の中下部のシリンダボア側の全壁面のうちの２つのシリンダボアに亘る分の壁面に接触する保温用ゴム部材と、該保温用ゴム部材が固定される金属基体部材と、該金属基体部材の背面側に固定され、該溝状冷却水流路の中下部のシリンダボア側の壁面に向かって、該金属基体部材が該保温用ゴム部材を押し付けるように付勢すると共に、該金属基体部材と溝状冷却水流路の中下部のシリンダボア側の壁面とは反対側の壁面との間の冷却水流れを抑制する付勢兼背面側流れ抑制部材と、からなり、
該付勢兼背面側流れ抑制部材が、該金属基体部材の各ボア部毎に、１つ以上付設されていること、
を特徴する請求項１記載のシリンダボア壁の保温具。 A cylinder bore wall heat insulator that is installed in the middle and lower part of a groove-like cooling water flow path of a cylinder block of an internal combustion engine having three cylinder bores, and that keeps some of the bore walls of all the cylinder bores,
A heat insulating rubber member that contacts two cylinder bores of all wall surfaces on the cylinder bore side in the middle and lower part of the grooved cooling water flow path, a metal base member to which the heat insulating rubber member is fixed, and the metal The metal base member is fixed to the back surface side of the base member member, and urges the metal base member member to press the heat retaining rubber member toward the wall surface on the cylinder bore side in the lower part of the grooved cooling water flow path. And a biasing and back side flow suppressing member that suppresses the cooling water flow between the wall surface on the opposite side to the wall surface on the cylinder bore side in the middle and lower part of the grooved cooling water flow path,
One or more of the biasing and back side flow suppressing members are provided for each bore portion of the metal base member;
The heat insulating device for a cylinder bore wall according to claim 1, wherein: ２つ以上のシリンダボアを有する内燃機関のシリンダブロックの溝状冷却水流路の中下部に設置され、全シリンダボアのボア壁のうちの一部のボア壁を保温するためのシリンダボア壁の保温具であり、
溝状冷却水流路の中下部のシリンダボア側の全壁面のうちの１つのシリンダボアの壁面に接触する保温用ゴム部材と、該保温用ゴム部材が固定される金属基体部材と、該金属基体部材の背面側に固定され、該溝状冷却水流路の中下部のシリンダボア側の壁面に向かって、該金属基体部材が該保温用ゴム部材を押し付けるように付勢すると共に、該金属基体部材と溝状冷却水流路の中下部のシリンダボア側の壁面とは反対側の壁面との間の冷却水流れを抑制する付勢兼背面側流れ抑制部材と、からなり、
該付勢兼背面側流れ抑制部材が、該金属基体部材の各ボア部毎に、１つ以上付設されていること、
を特徴する請求項１記載のシリンダボア壁の保温具。 A heat insulator for a cylinder bore wall, which is installed in the middle and lower part of a groove-like cooling water flow path of a cylinder block of an internal combustion engine having two or more cylinder bores, and keeps a part of the bore walls of all the cylinder bores. ,
A heat insulating rubber member that is in contact with the wall surface of one of the cylinder bores on the cylinder bore side in the middle and lower part of the grooved cooling water flow path; a metal base member to which the heat insulating rubber member is fixed; The metal base member is fixed to the rear surface and urged toward the wall surface on the cylinder bore side in the lower part of the groove-like cooling water flow path so as to press the heat retaining rubber member. An urging and back side flow suppressing member for suppressing the flow of cooling water between the wall surface on the opposite side of the cylinder bore side wall in the lower part of the cooling water flow path,
One or more of the biasing and back side flow suppressing members are provided for each bore portion of the metal base member;
The heat insulating device for a cylinder bore wall according to claim 1, wherein: シリンダボアを有する内燃機関のシリンダブロックの溝状冷却水流路の中下部に設置され、全シリンダボアのボア壁のうちの一部のボア壁を保温するためのシリンダボア壁の保温具であり、
溝状冷却水流路の中下部のシリンダボア側の全壁面のうちの１つのシリンダボアの壁面又は２つ以上のシリンダボアに亘る分の壁面に接触する保温用ゴム部材と、該保温用ゴム部材が固定される金属基体部材と、該金属基体部材の背面側に固定され、該溝状冷却水流路の中下部のシリンダボア側の壁面に向かって、該金属基体部材が該保温用ゴム部材を押し付けるように付勢する付勢部材と、該金属基体部材の背面側に固定され、該金属基体部材と溝状冷却水流路の中下部のシリンダボア側の壁面とは反対側の壁面との間の冷却水流れを抑制する背面側流れ抑制部材と、からなり、
該付勢部材が、該金属基体部材の各ボア部毎に、１つ以上付設されており、
該背面側流れ抑制部材が、１つ以上付設されていること、
を特徴するシリンダボア壁の保温具。 A cylinder bore wall heat insulator that is installed in the middle and lower part of the groove-like cooling water flow path of the cylinder block of the internal combustion engine having the cylinder bore, and that keeps a part of the bore walls of the cylinder bores,
A heat retaining rubber member that is in contact with the wall surface of one cylinder bore or two or more cylinder bores among all the wall surfaces on the cylinder bore side in the middle and lower part of the grooved cooling water flow path, and the heat retaining rubber member are fixed A metal base member that is fixed to the back side of the metal base member, and is attached so that the metal base member presses the heat retaining rubber member toward the wall surface on the cylinder bore side in the lower part of the grooved cooling water flow path. A biasing member that is energized and a cooling water flow fixed between the metal base member and the wall surface on the opposite side of the wall surface on the cylinder bore side in the lower part of the groove-like cooling water flow path. A back side flow suppressing member for suppressing,
One or more of the urging members are attached to each bore portion of the metal base member,
That one or more back side flow restraining members are attached;
Cylinder bore wall thermal insulation. ４つ以上のシリンダボアを有する内燃機関のシリンダブロックの溝状冷却水流路の中下部に設置され、全シリンダボアのボア壁のうちの一部のボア壁を保温するためのシリンダボア壁の保温具であり、
溝状冷却水流路の中下部のシリンダボア側の全壁面のうちの２つ又は３つのシリンダボアに亘る分の壁面に接触する保温用ゴム部材と、該保温用ゴム部材が固定される金属基体部材と、該金属基体部材の背面側に固定され、該溝状冷却水流路の中下部のシリンダボア側の壁面に向かって、該金属基体部材が該保温用ゴム部材を押し付けるように付勢する付勢部材と、該金属基体部材の背面側に固定され、該金属基体部材と溝状冷却水流路の中下部のシリンダボア側の壁面とは反対側の壁面との間の冷却水流れを抑制する背面側流れ抑制部材と、からなり、
該付勢部材が、該金属基体部材の各ボア部毎に、１つ以上付設されており、
該背面側流れ抑制部材が、１つ以上付設されていること、
を特徴する請求項５記載のシリンダボア壁の保温具。 A cylinder bore wall heat insulator that is installed in the middle and lower part of a groove-like cooling water flow path of a cylinder block of an internal combustion engine having four or more cylinder bores, and that keeps a part of the bore walls of all the cylinder bores. ,
A heat insulating rubber member that contacts two or three cylinder bores of the entire wall surface on the cylinder bore side in the middle and lower part of the grooved cooling water flow path, and a metal base member to which the heat insulating rubber member is fixed A biasing member fixed to the back side of the metal base member and biasing the metal base member so as to press the heat retaining rubber member toward the wall surface on the cylinder bore side in the lower part of the grooved cooling water flow path And a back side flow that is fixed to the back side of the metal base member and suppresses the flow of cooling water between the metal base member and the wall surface on the opposite side of the wall surface on the cylinder bore side in the middle of the grooved cooling water flow path A restraining member,
One or more of the urging members are attached to each bore portion of the metal base member,
That one or more back side flow restraining members are attached;
The heat insulating device for a cylinder bore wall according to claim 5, wherein: ３つのシリンダボアを有する内燃機関のシリンダブロックの溝状冷却水流路の中下部に設置され、全シリンダボアのボア壁のうちの一部のボア壁を保温するためのシリンダボア壁の保温具であり、
溝状冷却水流路の中下部のシリンダボア側の全壁面のうちの２つのシリンダボアに亘る分の壁面に接触する保温用ゴム部材と、該保温用ゴム部材が固定される金属基体部材と、該金属基体部材の背面側に固定され、該溝状冷却水流路の中下部のシリンダボア側の壁面に向かって、該金属基体部材が該保温用ゴム部材を押し付けるように付勢する付勢部材と、該金属基体部材の背面側に固定され、該金属基体部材と溝状冷却水流路の中下部のシリンダボア側の壁面とは反対側の壁面との間の冷却水流れを抑制する背面側流れ抑制部材と、からなり、
該付勢部材が、該金属基体部材の各ボア部毎に、１つ以上付設されており、
該背面側流れ抑制部材が、１つ以上付設されていること、
を特徴する請求項５記載のシリンダボア壁の保温具。 A cylinder bore wall heat insulator that is installed in the middle and lower part of a groove-like cooling water flow path of a cylinder block of an internal combustion engine having three cylinder bores, and that keeps some of the bore walls of all the cylinder bores,
A heat insulating rubber member that contacts two cylinder bores of all wall surfaces on the cylinder bore side in the middle and lower part of the grooved cooling water flow path, a metal base member to which the heat insulating rubber member is fixed, and the metal An urging member fixed to the back surface side of the base member and urged so that the metal base member presses the heat retaining rubber member toward the wall surface on the cylinder bore side in the lower part of the grooved cooling water flow path; A back side flow restraining member fixed to the back side of the metal base member and restraining a coolant flow between the metal base member and the wall surface on the opposite side of the wall surface on the cylinder bore side in the middle and lower part of the grooved cooling water flow path; Consists of
One or more of the urging members are attached to each bore portion of the metal base member,
That one or more back side flow restraining members are attached;
The heat insulating device for a cylinder bore wall according to claim 5, wherein: ２つ以上のシリンダボアを有する内燃機関のシリンダブロックの溝状冷却水流路の中下部に設置され、全シリンダボアのボア壁のうちの一部のボア壁を保温するためのシリンダボア壁の保温具であり、
溝状冷却水流路の中下部のシリンダボア側の全壁面のうちの１つのシリンダボアの壁面に接触する保温用ゴム部材と、該保温用ゴム部材が固定される金属基体部材と、該金属基体部材の背面側に固定され、該溝状冷却水流路の中下部のシリンダボア側の壁面に向かって、該金属基体部材が該保温用ゴム部材を押し付けるように付勢する付勢部材と、該金属基体部材の背面側に固定され、該金属基体部材と溝状冷却水流路の中下部のシリンダボア側の壁面とは反対側の壁面との間の冷却水流れを抑制する背面側流れ抑制部材と、からなり、
該付勢部材が、該金属基体部材の各ボア部毎に、１つ以上付設されており、
該背面側流れ抑制部材が、１つ以上付設されていること、
を特徴する請求項５記載のシリンダボア壁の保温具。 A heat insulator for a cylinder bore wall, which is installed in the middle and lower part of a groove-like cooling water flow path of a cylinder block of an internal combustion engine having two or more cylinder bores, and keeps a part of the bore walls of all the cylinder bores. ,
A heat insulating rubber member that is in contact with the wall surface of one of the cylinder bores on the cylinder bore side in the middle and lower part of the grooved cooling water flow path; a metal base member to which the heat insulating rubber member is fixed; An urging member fixed to the back surface and urged so that the metal base member presses the heat retaining rubber member toward the wall surface on the cylinder bore side in the lower part of the groove-like cooling water flow path; and the metal base member A back side flow restraining member that restrains the coolant flow between the metal base member and the wall surface on the opposite side of the wall surface on the cylinder bore side in the middle and lower part of the groove-like cooling water flow path. ,
One or more of the urging members are attached to each bore portion of the metal base member,
That one or more back side flow restraining members are attached;
The heat insulating device for a cylinder bore wall according to claim 5, wherein: 請求項１〜８いずれか１項記載のシリンダボア壁の保温具が設置されていることを特徴とする内燃機関。   9. An internal combustion engine comprising the cylinder bore wall heat insulating device according to claim 1 installed therein. 請求項９記載の内燃機関を有することを特徴とする自動車。

An automobile having the internal combustion engine according to claim 9.

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