WO2020036052A1 - Cylinder bore wall insulator, internal combustion engine, and automobile - Google Patents
Cylinder bore wall insulator, internal combustion engine, and automobile Download PDFInfo
- Publication number
- WO2020036052A1 WO2020036052A1 PCT/JP2019/029389 JP2019029389W WO2020036052A1 WO 2020036052 A1 WO2020036052 A1 WO 2020036052A1 JP 2019029389 W JP2019029389 W JP 2019029389W WO 2020036052 A1 WO2020036052 A1 WO 2020036052A1
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- WIPO (PCT)
- Prior art keywords
- cooling water
- cylinder bore
- water flow
- flow path
- groove
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/02—Cylinders; Cylinder heads having cooling means
- F02F1/10—Cylinders; Cylinder heads having cooling means for liquid cooling
- F02F1/14—Cylinders with means for directing, guiding or distributing liquid stream
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P3/00—Liquid cooling
- F01P3/02—Arrangements for cooling cylinders or cylinder heads
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P3/00—Liquid cooling
- F01P3/02—Arrangements for cooling cylinders or cylinder heads
- F01P2003/021—Cooling cylinders
Definitions
- the present invention relates to a heat retaining tool disposed in contact with a wall surface of a cylinder block wall of a cylinder block of an internal combustion engine on a groove-shaped cooling water flow path side, an internal combustion engine including the same, and an automobile having the internal combustion engine.
- the fuel explodes at the top dead center of the piston in the bore, and the explosion pushes down the piston. Due to this structure, the temperature on the upper side of the cylinder bore wall increases and the temperature on the lower side decreases. Therefore, a difference occurs 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 expands less.
- Patent Literature 1 discloses a flow that divides a groove-shaped cooling heat medium flow path into a plurality of flow paths by being arranged in a groove-shaped cooling heat medium flow path formed in a cylinder block of an internal combustion engine.
- a road partitioning member formed at a height less than the 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 channel dividing member that becomes a wall portion to be divided into the heat medium for forming the groove-shaped cooling heat medium from the flow channel dividing member toward the opening of the groove-shaped cooling heat medium flow channel;
- the leading edge portion is bent by its own bending and restoring force.
- the wall temperature of the cylinder bore wall can be made uniform to some extent, so that the difference in the amount of thermal deformation between the upper side and the lower side of the cylinder bore wall is reduced.
- only uniform control can be performed on the entire cylinder bore wall.
- Patent Literature 2 discloses a heat retaining device for selectively retaining only the bore wall of one cylinder bore among the cylinder bores.
- JP 2008-31939 A (Claims) JP 2007-162473 A (FIG. 4)
- Cooling water with a low temperature flows near the cylinder bore wall near the inlet of the cooling water to the grooved cooling water flow path of the cylinder block, and the flow of the cooling water is high. Is too low. For this reason, it is necessary to install a heat retaining tool for selectively retaining the temperature of the cylinder bore wall near the inlet of the cooling water. For this purpose, a warming device of the cylinder bore wall for warming the portion facing the inlet of the cooling water is installed.
- an object of the present invention is a heat retention device for keeping the temperature of a cylinder bore wall opposite to an inlet of cooling water to a groove-shaped cooling water flow path of a cylinder block, in a vertical direction and a circumferential direction of a groove-shaped cooling water flow path. It is an object of the present invention to provide a cylinder bore wall heat retaining device capable of restricting the movement of the cylinder bore.
- the present invention (1) is provided in the groove-shaped cooling water flow path of the cylinder block of the internal combustion engine having the cylinder bore, for keeping the temperature of the bore wall facing the inlet of the cooling water into the grooved cooling water flow path.
- the metal base member has a rear pressing portion for pressing the entire rubber member from the rear side toward the wall surface on the cylinder bore side of the groove-shaped cooling water flow path, and a rear surface pressing portion for pressing the entire rubber member toward the wall surface on the cylinder bore side of the grooved cooling water flow path.
- Position is outside the position of the outer wall surface of the groove-shaped cooling water flow path, having a movement restricting portion for restricting the movement of the metal base member, It is intended to provide a cylinder bore wall heat insulator characterized by the following.
- the present invention (2) provides the cylinder bore wall heat retaining device according to (1), wherein the rubber member is a heat-expandable rubber or a water-swellable rubber.
- the present invention (3) provides an internal combustion engine characterized in that a heat retaining member for the cylinder bore wall of either (1) or (2) is provided in the groove-shaped cooling water flow path.
- the present invention (4) provides an automobile having the internal combustion engine of (3).
- ADVANTAGE OF THE INVENTION is a heat retention tool for keeping the temperature of the cylinder bore wall facing the inflow of the cooling water into the grooved cooling water flow path of the cylinder block, and moves vertically and circumferentially of the grooved cooling water flow path. Can be provided.
- FIG. 2 is a sectional view taken along line xx of FIG. 1. It is a perspective view of the cylinder block shown in FIG.
- FIG. 2 is a top view of an inlet of cooling water of a cylinder block shown in FIG. 1.
- FIG. 2 is a view of an inlet of cooling water of a cylinder block shown in FIG. 1 as viewed from a groove-shaped cooling water flow path side.
- FIG. 2 is a diagram of a cooling water supply port of the cylinder block shown in FIG. 1 as viewed from the outside.
- FIG. 11 is an end view taken along line xx of FIG. 10.
- FIG. 8 is a diagram showing how to overlap each member of the heat retaining tool 30 on the cylinder bore wall in FIG. 7.
- FIG. 8 is a diagram showing how to overlap each member of the heat retaining tool 30 on the cylinder bore wall in FIG. 7.
- FIG. 8 is a view showing a cut-off portion for forming the elastic portion attaching member 31 in FIG. 7 from a metal plate.
- FIG. 8 is a diagram showing a cut-off portion for forming a front-side butt plate 34 in FIG. 7 from a metal plate.
- FIG. 2 is a schematic view showing a state in which a cylinder wall warmer 30 is installed on a cylinder block 11 shown in FIG. 1.
- FIG. 2 is a schematic plan view showing a state in which a cylinder wall warmer 30 is installed on a cylinder block 11 shown in FIG. 1.
- FIG. 2 is a schematic end view showing a state in which a cylinder wall warmer 30 is installed on a cylinder block 11 shown in FIG. 1.
- FIG. 1 is a schematic view showing a state in which a cylinder wall warmer 30 is installed on a cylinder block 11 shown in FIG. 1.
- FIG. 19 is a view showing a state where the heat-sensitive expansion rubber 33 in FIG. 18 is expanded and is in contact with the bore wall.
- FIG. 4 is a schematic plan view showing movement of a heat retaining tool 30 on a cylinder bore wall and a flow of cooling water during operation of the internal combustion engine.
- FIG. 4 is a schematic end view showing movement of a heat retaining tool 30 on a cylinder bore wall and a flow of cooling water during operation of the internal combustion engine.
- FIGS. 1 to 3 show an embodiment of a cylinder block on which a cylinder bore wall warmer of the present invention is installed
- FIG. 1 shows a cylinder block on which a cylinder bore wall warmer 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
- FIG. 3 is a perspective view of the cylinder block shown in FIG.
- FIG. 4 is a view of the cooling water inlet of the cylinder block as viewed from above, FIG.
- FIG. 5 is a view of the cooling water inlet of the cylinder block as viewed from the groove-shaped cooling water flow path side
- FIG. FIG. 4 is a diagram of a cooling water supply port viewed from the outside.
- FIG. 7 is a schematic perspective view showing an embodiment of the cylinder bore wall heat retaining device of the present invention.
- FIG. 8 is a view of the heat retaining member 30 on the cylinder bore wall in FIG. 7 as viewed from the heat-sensitive expansion rubber side.
- FIG. 9 is a view of the heat retaining member 30 of the cylinder bore wall in FIG. 7 as viewed from the rear side.
- FIG. 10 is a diagram of the cylinder bore wall warmer 30 in FIG. 7 as viewed from above.
- FIG. 11 is an end view taken along line xx of FIG. FIG.
- FIG. 12 and FIG. 13 are diagrams showing how to overlap the members of the heat retaining tool 30 on the cylinder bore wall in FIG.
- FIG. 14 is a view showing a cut-off portion for forming the elastic member 31 in FIG. 7 from a metal plate.
- FIG. 15 is a diagram showing a cut-off portion for forming the front-side butt plate 34 in FIG. 7 from a metal plate.
- the wall that separates the bore 12 from the groove-shaped cooling water flow path 14 is the cylinder bore wall 13.
- a cooling water supply path 15 for supplying cooling water to the grooved cooling water flow path 14 and a cooling water discharge port 16 for discharging cooling water from the grooved cooling water flow path 14 are formed. Have been.
- the bore 12 includes end bores 12a1 and 12a2 adjacent to one bore and intermediate bores 12b1 and 12b2 sandwiched between the two bores (the number of bores in the cylinder block is two. In this case, only the end bore is used.)
- the end bores 12a1 and 12a2 are bores at both ends
- 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.
- the wall between the end bore 12a1 and the intermediate bore 12b1, the wall between the intermediate bore 12b1 and the intermediate bore 12b2, and the wall between the intermediate bore 12b2 and the end bore 12a2 are portions sandwiched between the two bores. Therefore, since heat is transmitted from the two cylinder bores, the wall temperature is higher than the other walls. For this reason, in the wall surface 17 on the cylinder bore side of the groove-shaped cooling water flow path 14, the temperature becomes highest near the inter-bore wall 191. The temperature at and near the wall boundary 192 is highest.
- the wall surface on the cylinder bore 13 side is described as a wall surface 17 on the cylinder bore side of the grooved cooling water flow path.
- the wall surface of the cooling water flow path opposite to the wall surface 17 on the cylinder bore side is referred to as an outer wall surface 18 of the groove-shaped cooling water flow path.
- the cooling water supply path 15 formed in the cylinder block 11 includes a cooling water supply port 151 for supplying cooling water from the outside to the cylinder block 11 and a cooling water supplied to the cylinder block 11.
- the cooling water supply system includes a front-stage supply chamber 152 for cooling water once supplied, and an inlet 153 for cooling water for flowing the cooling water from the front-stage supply chamber 152 into the groove-shaped cooling water flow path 14.
- the cylinder block 11 is provided with a cooling water discharge port 16 for discharging the cooling water from the groove-shaped cooling water flow path 14 to the outside of the cylinder block 11.
- the cooling water supplied from the cooling water supply port 151 to the cylinder block 11 flows into the groove-shaped cooling water flow path 14 from the cooling water inlet 153 through the pre-stage supply chamber 152.
- an upper groove-like cooling water flow path 14 on the paper surface and a lower groove-like cooling water flow path 14 are divided and flow toward a cooling water discharge port 16. It is discharged out of the block 11.
- a cylinder bore wall heat retaining device 30 shown in FIGS. 7 to 11 keeps the bore wall facing the cooling water inlet 153 provided in the cylinder block 11 in FIG. 1, that is, the bore wall 20 of the cylinder bore 12a2 warm. It is a warming tool for. Therefore, the heat retaining tool 30 of the cylinder bore wall is provided in the groove-shaped cooling water flow path 14 near the cooling water inlet 153.
- the cylinder bore wall heat retaining member 30 has a metal leaf spring 37 and a movement limiting metal plate 38 attached thereto, and has an elastic portion attaching member 31 formed in an arc shape when viewed from above, and an arc-shaped member 31 when viewed from above.
- a rear-side pressing member 32, a heat-sensitive expansion rubber 33, and a front-side backing plate 34, which is formed in an arc shape when viewed from above, are sequentially superimposed on each other.
- the bent portion 35a formed, the bent portion 35b formed at the lower end of the elastic portion attaching member 31, the bent portion 36a formed at the right end of the elastic portion attaching member 31, and the left end of the elastic portion attaching member 31 As shown in FIG.
- the bent portion 36 b is bent toward the front-side backing plate 34, and the back portion is provided between the bent portions 35 a, 35 b, 36 a, 36 b and the elastic portion attaching member 31.
- Side pressing member 32 by thermal expansion rubber 33 and the front contact plate 34 is sandwiched, it is produced. That is, the heat retaining member 30 of the cylinder bore wall has the thermal expansion rubber 33 and the metal base member 29 including the elastic portion attaching member 31, the back pressing member 32, and the front side contact plate 34.
- the elastic portion attaching member 31, the rear pressing member 32, and the front side contact plate 34 jointly fix the thermal expansion rubber 33.
- the member 32 and the front side supporting plate 34 are metal base members.
- the thermal expansion rubber 33 is a member that thermally expands in the groove-shaped cooling water flow path, directly contacts the bore wall 20 of the cylinder bore 12a2, covers a heat retaining portion of the bore wall 20, and keeps the bore wall 20 warm.
- the rear-side pressing member 32 is formed in an arc shape when viewed from above, and is formed on the rear surface of the thermal expansion rubber 33 so that the entire thermal expansion rubber 33 can be pressed from the rear side of the thermal expansion rubber 33. Side (the surface opposite to the contact surface 26).
- the elastic member 31 is formed in an arc shape when viewed from above, and has a shape along the rear surface of the rear pressing member 32 (the surface opposite to the thermal expansion rubber 33).
- the elastic portion attaching member 31 is provided with a metal leaf spring 37 as an elastic portion and a movement limiting metal plate 38 as a movement limiting portion.
- the metal plate spring 37 is a vertically long rectangular metal plate, and one end in the longitudinal direction is connected to the elastic portion attaching member 31.
- the metal leaf spring 37 is attached to the elastic member 33 so that the other end is separated from the elastic member 31 by being bent from the elastic member 31 at one end connected to the elastic member 31. Have been.
- the other end of the metal leaf spring 37 is bent at the position of the contact portion 371 such that the contact portion 371 contacts the outer wall surface 18 of the groove-shaped cooling water flow path.
- the movement restricting metal plate 38 is a rectangular metal plate, and is attached to the elastic member 33 so as to extend horizontally from the back side of the elastic member 31 to the outside.
- the front-side backing plate 34 is formed in an arc shape when viewed from above, and has a rectangular opening 301 when viewed from the front side. Then, a bent portion 35a formed at the upper end of the elastic member 31, a bent portion 35b formed at the lower end of the elastic member 31, a bent portion 36a formed at the right end of the elastic member 31, A bent portion 36b formed on the left end of the elastic portion attaching member 31 is bent toward the front-side backing plate 34, and a back surface is provided between the elastic portion attaching member 31 and the bent portions 35a, 35b, 36a, 36b.
- These members are fixed by sandwiching the side pressing member 32, the thermal expansion rubber 33, and the front side backing plate 34.
- the surface opposite to the rear-side pressing member 32 is the contact surface 26 that is in contact with the wall surface 17 on the cylinder bore side of the groove-shaped cooling water flow path.
- the heat-sensitive expansion rubber 33 expands and comes into contact with the wall surface 17 on the cylinder bore side of the groove-shaped cooling water flow path 14 of the cylinder block 11.
- the wall surface 17 on the cylinder bore side of the groove-shaped cooling water flow path 14 is covered with the thermal expansion rubber 33.
- the metal plate spring 37 projecting toward the side opposite to the thermal expansion rubber 33 contacts the wall surface opposite to the wall surface 17 on the cylinder bore side, that is, the outer wall surface 18 of the groove-shaped cooling water flow path 14. And generate an urging force.
- the rear surface pressing member 32 presses the thermal expansion rubber 33 from the rear side toward the wall surface 17 on the cylinder bore side of the groove-shaped cooling water flow path 14 by the generated urging force of the metal leaf spring 37. Is in close contact with the wall surface 17 of the groove-shaped cooling water flow path 14 on the cylinder bore side.
- FIGS. 12 and 13 A procedure for manufacturing the cylinder bore wall heat retaining device 30 will be described. As shown in FIGS. 12 and 13, the front contact plate 34 is aligned with the contact surface of the thermal expansion rubber 33, and the rear pressing member 32, the metal plate spring 37, and the movement limiting metal are disposed on the rear side of the thermal expansion rubber 33.
- the plate 38 and the elastic member 31 provided with the bent portions 35a, 35b, 36a, 36b are sequentially joined together, and then the bent portions 35a, 35b, 36a, 36b are bent, as shown in FIGS. 7 to 11.
- the back pressing member 32, the thermal expansion rubber 33, and the front side contact plate 34 are sandwiched between the elastic portion attaching member 31 and the bent portions 35a, 35b, 36a, 36b, so that the elastic portion attaching member 31, the back surface
- the thermal expansion rubber 33 is fixed to the metal base member 29 composed of the pressing member 32 and the front backing plate 34, and the cylinder bore wall heat insulator 30 is manufactured.
- the procedure for manufacturing the elastic member 33 is as follows. As shown in FIG. 14, a metal plate 51 is prepared, and the hatched portion in FIG. 38, the bent portions 35a, 35b, 36a, 36b are formed, and a punched product 52 of a metal plate is produced. Next, the whole punched material 52 of a metal plate is formed into an arc shape, and the metal plate spring 37 is bent so as to protrude to the rear side. Further, the distal end side of the metal plate spring 37 is bent, and the movement limiting metal plate 38 is formed. The elastic portion attaching member 31 is manufactured by bending so as to extend in the horizontal direction. Also, as shown in FIG. 15, a metal plate 53 is prepared, and a hatched portion in FIG. 15 is cut off to form an opening 301. The punched material 54 is manufactured. Next, the front side backing plate 34 is manufactured by forming the punched object 54 of a metal plate into an arc shape.
- FIG. 16 is a schematic diagram showing a state in which a cylinder bore wall warming device 30 is installed in the cylinder block 11 shown in FIG.
- the heat retaining tool 30 of the cylinder bore wall is inserted into the groove-shaped cooling water flow path 14 of the cylinder block 11 at a position where the cooling water inlet 153 is formed, and FIG.
- the heat retaining tool 30 of the cylinder bore wall is installed in the groove-shaped cooling water flow path 14.
- the cylinder bore wall heat insulator 30 is installed such that the movement limiting metal plate 38 of the cylinder bore wall heat insulator 30 enters the coolant inlet 153.
- FIGS. 17 and 18 are schematic views showing a state in which the cylinder block wall warming device 30 is installed in the cylinder block 11 shown in FIG. 1.
- FIG. 17 is an enlarged view near the installation position of the cylinder bore wall warming device 30.
- FIG. 17 is a plan view, and FIG. 18 is an end view.
- the thermal expansion rubber 33 is heated and thermally expanded. Then, as shown in FIG. 19, the thermal expansion rubber 33 expands toward the cylinder bore side wall surface 17 through the opening 301 formed in the inner portion of the front side backing plate 34, and the contact surface 26 becomes in contact with the cylinder bore. Contacts the side wall surface 17. Even after the contact surface 26 contacts the wall surface 17 on the cylinder bore side, the thermal expansion rubber 33 continues to expand and tends to expand to the open state. Therefore, a force is applied to the contact portion 371 of the metal leaf spring 37 in a direction toward the elastic portion attaching member 31.
- the metal leaf spring 37 is deformed so that the contact portion 371 approaches the elastic portion attaching member 31 side, so that the metal leaf spring 37 has an elastic force to return to the original state.
- the elastic portion attaching member 31 is pushed toward the wall surface 17 on the cylinder bore side of the groove-shaped cooling water flow path, and as a result, by the rear side pushing member 32 pushed by the elastic portion attaching member 31, The thermal expansion rubber 33 is pressed against the wall surface 17 on the cylinder bore side of the groove-shaped cooling water flow path.
- the heat retaining member 30 of the cylinder bore wall is installed in the groove-shaped cooling water flow path 14, and the thermal expansion rubber 33 is heated and thermally expanded, whereby the metal leaf spring 37 is deformed, and the elasticity generated when the deformation tends to return.
- the rear-side pressing member 32 is urged by the force so as to press the thermal expansion rubber 33 against the wall surface 17 on the cylinder bore side of the groove-shaped cooling water flow path.
- the heat-sensitive expansion rubber 33 of the heat retaining device 30 on the cylinder bore wall comes into contact with the wall surface 17 on the cylinder bore side of the groove-shaped cooling water flow path.
- FIG. 19 is a view showing a state where the heat-sensitive expansion rubber 33 in FIG. 18 is expanded and is in contact with the bore wall.
- the movement limiting metal plate 38 extends toward the inner lower part of the cooling water inlet 153.
- the extension end 382 of the movement limiting metal plate 38 is located outside the position of the outer wall surface 18 of the groove-shaped cooling water flow path 14.
- the movement of the heat retaining member 30 of the cylinder bore wall to the left is limited to a position where the lateral end 381a of the movement limiting metal plate 38 contacts the inner wall 154a of the cooling water inlet 153.
- the movement limiting metal plate 38 causes the movement of the heat retaining tool 30 of the cylinder bore wall to the right in the circumferential direction of the groove-shaped cooling water flow path in FIG. It is limited to a position where it contacts the inner wall 154b of the inflow port 153.
- vibration during operation of the internal combustion engine causes the heat retaining tool 30 on the cylinder bore wall to move up and down as indicated by reference numeral 42.
- the movement-restricting metal plate 38 of the cylinder bore wall warmer 30 extends to the inside of the cooling water inlet 153, the movement of the cylinder bore wall warmer 30 in the downward direction in FIG.
- the lower surface 383 of the limiting metal plate 38 is limited by contact with the inner wall 155 of the cooling water inlet 153.
- the cooling water 40 flows from the front-stage supply chamber 152 to the cooling water inlet 153, and then extends from the extension end 382 of the movement limiting metal plate 38 to the movement limiting metal plate 38.
- the cooling water flows toward the lower side of the groove-shaped cooling water flow path 14. Therefore, the movement-limiting metal plate 38 is pushed from above by the water flow of the cooling water flowing downward from the upper side of the movement-limiting metal plate 38 to the side of the movement-limiting metal plate 38. Then, the flow of the cooling water restricts the upward movement of the warming device 30 of the cylinder bore wall in FIG. 21.
- FIG. 20 and FIG. 21 are schematic diagrams showing movement of the warming device 30 on the cylinder bore wall and the flow of cooling water during operation of the internal combustion engine, and are enlarged views of the vicinity of the installation position of the warming device 30 on the cylinder bore wall. 20 is a plan view, and FIG. 21 is an end view.
- a heat retaining device for a cylinder bore wall of the present invention is provided in a groove-shaped cooling water flow path of a cylinder block of an internal combustion engine having a cylinder bore, for keeping the bore wall opposed to an inlet of cooling water into the grooved cooling water flow path warm.
- the metal base member has a rear pressing portion for pressing the entire rubber member from the rear side toward the wall surface on the cylinder bore side of the groove-shaped cooling water flow path, and a rear surface pressing portion for pressing the entire rubber member toward the wall surface on the cylinder bore side of the grooved cooling water flow path.
- the cylinder wall warmer of the present invention is installed in the groove-shaped cooling water flow path of the cylinder block of the internal combustion engine.
- the cylinder block on which the cylinder bore wall heat retaining device of the present invention is installed is an open deck type cylinder block in which two or more cylinder bores are formed in series.
- the cylinder block has a cylinder bore having two end bores.
- the cylinder block has a cylinder bore having two end bores and one or more intermediate bores. ing.
- bores at both ends are called end bores
- a bore sandwiched between other cylinder bores on both sides is called an intermediate bore.
- a groove-shaped cooling water flow path for flowing cooling water is formed in the cylinder block on which the heat retaining device of the cylinder bore wall of the present invention is installed.
- the wall that separates the bore from the groove-shaped cooling water flow path is a cylinder bore wall.
- the cylinder block is provided with a cooling water supply path for supplying cooling water to the grooved cooling water flow path and a cooling water discharge port for discharging cooling water from the grooved cooling water flow path.
- the position and shape of the cooling water supply port for supplying the cooling water into the cylinder block, the position and shape of the cooling water inlet to the groove-shaped cooling water flow path, the supply of the cooling water is appropriately selected. Since the temperature is higher above the cylinder bore wall, the vertical position of the cooling water inlet is usually above the groove-shaped cooling water flow path. Further, the supply port of the cooling water to the cylinder block is usually provided below. Also, since the position of the cooling water supply port to the cylinder block and the position of the cooling water inflow port to the groove-shaped cooling water flow path are usually different in the vertical direction, a path connecting them (see FIG. 1). In the embodiment shown, a pre-stage supply chamber 152) for cooling water is provided.
- the cylinder bore wall opposed to the cooling water inlet has another wall. It will be overcooled compared to the bore wall. Therefore, the cylinder bore wall heat retaining device of the present invention is installed in order to prevent the cylinder bore wall facing the cooling water inlet from being excessively cooled. For this reason, the position where the heat retaining device of the cylinder bore wall of the present invention is installed is near the position where the cooling water inlet is formed in the groove-shaped cooling water flow path.
- the vertical position of the cylinder bore wall, the size of the rubber member, and the installation range to be kept warm by the cylinder bore wall warming tool of the present invention are appropriately selected.
- the cylinder bore wall heat retainer of the present invention has a rubber member and a metal base member.
- the rubber member is a member that directly contacts the wall surface on the cylinder bore side of the groove-shaped cooling water flow path, covers the wall surface on the cylinder bore side of the groove-shaped cooling water flow path, and keeps the cylinder bore wall warm.
- the member is pressed against the wall surface on the cylinder bore side of the groove-shaped cooling water flow path. Therefore, when viewed from above, the rubber member is formed into a shape along the wall surface facing the cooling water inlet, of the wall surface on the cylinder bore side of the groove-shaped cooling water flow path, that is, an arc-shaped shape. I have.
- the shape of the rubber member when viewed from the side is appropriately selected according to the wall surface on the cylinder bore side of the groove-shaped cooling water passage to be covered with the rubber member.
- Examples of the material of the rubber member include rubber such as solid rubber, expanded rubber, foamed rubber, and soft rubber, and a silicone-based gel material.
- the rubber member comes into strong contact with the cylinder bore wall, so that the rubber member can be prevented from being shaved.
- a heat-sensitive rubber or a water-swellable rubber capable of expanding the rubber member portion in the groove-shaped cooling water flow path later is preferable.
- the biasing force is generated exclusively by the elastic portion, and the material of the rubber member is a material that expands in the groove-shaped cooling water flow path. In this case, the biasing force is generated by the joint of the elastic portion and the expanded rubber.
- composition of the solid rubber examples include natural rubber, butadiene rubber, ethylene propylene diene rubber (EPDM), nitrile butadiene rubber (NBR), silicone rubber, and fluoro rubber.
- the expanded rubber examples include a thermally expanded rubber.
- the thermal expansion rubber is a composite obtained by impregnating a base foam material with a thermoplastic material having a lower melting point than the base foam material and compressing the same.At normal temperature, the compressed state is maintained at least by a cured product of the thermoplastic material present in the surface layer. In addition, the cured material of the thermoplastic material is softened by heating to release the compressed state.
- Examples of the thermal expansion rubber include a thermal expansion rubber described in JP-A-2004-143262.
- the heat retaining member of the cylinder bore wall of the present invention is installed in the groove-shaped cooling water flow path, and heat is applied to the thermal expansion rubber, so that the thermal expansion rubber expands to a predetermined temperature. It expands and deforms to the shape of.
- Examples of the base foam material relating to the heat-sensitive expansion rubber include various polymer materials such as rubber, elastomer, thermoplastic resin, and thermosetting resin. Specific examples include natural rubber, chloropropylene rubber, styrene butadiene rubber, and nitrile. Various thermosetting resins such as butadiene rubber, ethylene propylene diene terpolymer, various synthetic rubbers such as silicone rubber, fluorine rubber and acrylic rubber, various elastomers such as soft urethane, hard urethane, phenol resin, and melamine resin. Can be
- thermoplastic substance relating to the heat-expandable rubber one having any of a glass transition point, a melting point, and a softening temperature of less than 120 ° C is preferable.
- thermoplastic substance relating to the thermal expansion rubber include polyethylene, polypropylene, polystyrene, polyvinyl chloride, polyvinylidene chloride, polyvinyl acetate, polyacrylate, styrene butadiene copolymer, chlorinated polyethylene, polyvinylidene fluoride, and ethylene acetate.
- Vinyl copolymer ethylene vinyl acetate vinyl chloride acrylate copolymer, ethylene vinyl acetate acrylic ester copolymer, ethylene vinyl acetate vinyl chloride copolymer, nylon, acrylonitrile butadiene copolymer, polyacrylonitrile, polyvinyl chloride
- Thermoplastic resin such as polychloroprene, polybutadiene, thermoplastic polyimide, polyacetal, polyphenylene sulfide, polycarbonate, thermoplastic polyurethane, low melting glass frit, starch Solder include various thermoplastic compounds such as wax.
- examples of the expanded rubber include a 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 shape retention properties that absorbs water, swells, and maintains an expanded shape.
- examples of the water-swellable rubber include, for example, a crosslinked product of a polyacrylic acid neutralized product, a crosslinked product of a starch acrylic acid graft copolymer, a crosslinked carboxymethylcellulose salt, and a rubber material in which a water-absorbing substance such as polyvinyl alcohol is added to the rubber. No.
- water-swellable rubber examples include a water-swellable rubber containing a ketiminated polyamide resin, a glycidyl etherified product, a water-absorbing resin and rubber described in JP-A-9-208752.
- the heat retaining tool of the cylinder bore wall of the present invention is installed in the groove-shaped cooling water flow path, the cooling water is flown, and the water-swellable rubber absorbs water.
- the swellable rubber expands and expands into a predetermined shape.
- Foam rubber is a porous rubber.
- the foamed rubber include a sponge-like foamed rubber having an open-cell structure, a foamed rubber having a closed-cell structure, and a semi-closed foamed rubber.
- Specific examples of the material of the foamed rubber include an ethylene propylene diene terpolymer, a silicone rubber, a nitrile butadiene copolymer, a silicone rubber, a fluorine rubber and the like.
- the foaming rate of the foamed rubber is not particularly limited, is appropriately selected, and the moisture content of the rubber member can be adjusted by adjusting the foaming rate.
- 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.
- the heat retaining tool for the cylinder bore wall of the present invention is installed in the groove-shaped cooling water flow path, When the cooling water is caused to flow, the rubber member contains water.
- the range of the water content of the rubber member when the cooling water flows through the groove-shaped cooling water flow path is appropriately selected depending on the operating conditions of the internal combustion engine and the like.
- the water content refers to a weight water content represented by (cooling water weight / (filler weight + cooling water weight)) ⁇ 100.
- the shape and thickness of the rubber member are not particularly limited, and are appropriately selected.
- the metal base member is a member to which the rubber member is fixed.
- the metal base member has at least a back pressing part, an elastic part, and a movement restricting part.
- the metal base member may be a member in which the back surface pressing portion, the elastic portion, and the movement restricting portion are integrated, or may be a combination of two or more members.
- the metal base member includes a member serving as a rear surface pressing portion, a fixing portion (a bent portion, a front side contact plate, etc.) for fixing a rubber member, an elastic portion, and movement restriction.
- It may be composed of a combination with a member provided with a portion, or a fixing portion (a bent portion, a front side contact plate, etc.) for fixing a rubber member to a member serving as a rear pressing portion may be provided.
- the elastic portion and the movement restricting portion may be formed and provided by welding or the like.
- the material of the metal base member is not particularly limited, but stainless steel (SUS), an aluminum alloy or the like is preferable in terms of good LLC resistance and high strength.
- the back pressing portion is a portion for pressing the entire rubber member from the back side toward the wall surface on the cylinder bore wall side of the groove-shaped cooling water flow path.
- the rear pressing portion has an arc shape when viewed from above, and the rear side of the rubber member (the surface opposite to the contact surface side) so that the entire rubber member can be pressed from the rear side of the rubber member. ), And covers the entire back side or almost the entire back side of the rubber member.
- the thickness of the back pressing portion is appropriately selected.
- the material of the back pressing portion is appropriately selected, but a metal plate such as stainless steel or an aluminum alloy is preferable.
- the elastic portion is provided on the cylinder bore wall of the present invention on the rear side of the heat retaining member.
- This elastic portion is elastically deformed by the heat retaining member of the cylinder bore wall of the present invention being installed in the groove-shaped cooling water flow path, and the rear surface pressing member is rubberized toward the cylinder bore side wall surface of the groove-shaped cooling water flow path.
- This is a member for urging by an elastic force so as to press the member.
- At least one elastic portion is provided on the cylinder bore wall heat insulator of the present invention.
- the arc of the cylinder bore wall heat insulator of the present invention is obtained.
- two or more are provided in the direction, and particularly preferably, three or more are provided.
- the form of the elastic portion is not particularly limited, and examples thereof include a plate-like elastic member, a coil-like elastic member, a leaf spring, a torsion spring, and an elastic rubber.
- a metal elastic member such as a metal leaf spring, a coil spring, a laminated leaf spring, and a torsion spring is preferable.
- the portion in contact with the wall surface of the groove-shaped cooling water flow path opposite to the wall surface on the cylinder bore side and the vicinity thereof protrude from the wall surface of the groove-shaped cooling water flow path opposite to the wall surface on the cylinder bore side.
- the contact portion with the wall surface of the elastic portion causes the groove-shaped cooling water flow path to be formed on the cylinder bore side. This is preferable in that the wall surface opposite to the wall surface can be prevented from being damaged.
- the elastic member when installed in the groove-shaped cooling water flow path, the elastic member allows the rubber member to be urged with an appropriate pressing force, so that the shape of the groove-shaped cooling water flow path is adjusted.
- the form, shape, size, installation position, number of installations, and the like of the elastic portion are appropriately selected.
- the elastic member and the metal plate spring as the elastic member are integrally formed, and the rubber member and the rear surface pressing member are formed on the elastic member with the metal plate spring.
- the elastic portion is attached to the heat retaining member of the cylinder bore wall, but the method of attaching the elastic portion to the heat retaining member of the cylinder bore wall is not particularly limited.
- a metal elastic member such as a metal leaf spring, a metal coil spring, a laminated leaf spring or a torsion spring is welded to a back pressing member made of a metal plate, and the elastic portion is welded to the back pressing member.
- a method of fixing a rubber member is welded to the back pressing member.
- the movement restricting portion is provided on the cylinder bore wall of the present invention on the rear side of the heat retaining member. During operation of the internal combustion engine, a portion on the extension end side of the movement restriction portion enters a lower portion inside the cooling water inlet. That is, during operation of the internal combustion engine, the extending end of the movement restricting portion is located outside the outer wall surface of the groove-shaped cooling water flow path.
- the movement restricting portion is configured such that the portion on the extension end side enters the lower portion inside the cooling water inflow port, so that the heat retaining tool of the cylinder bore wall of the present invention causes the groove cooling water flow to flow due to vibration during operation of the internal combustion engine. It is a member for restricting movement on the road.
- the shape of the movement restricting portion extends from the rear side of the heat retaining member of the cylinder bore wall of the present invention toward the lower portion inside the cooling water inlet, and the position of the extending end is the outer wall surface of the groove-shaped cooling water flow path.
- the shape is not particularly limited as long as it is a shape that is more outward than the shape. For example, a rectangular plate shape, a T-shaped plate shape, an L-shaped plate shape, etc. Shape.
- the material of the movement restricting portion is not particularly limited, but stainless steel (SUS), an aluminum alloy, or the like is preferable in terms of good LLC resistance and high strength.
- the installation position of the movement restricting portion on the rear side of the heat retaining tool of the cylinder bore wall of the present invention is not particularly limited, and is appropriately selected depending on the position and shape of the cooling water inlet.
- the method for fixing the rubber member to the metal base member is not particularly limited.
- a bent portion is provided on the metal base member (in the embodiment shown in FIG. 7, a member provided with an elastic portion, which is a constituent member of the metal base member).
- a method of fixing the metal member by sandwiching the rubber member between the metal base member and the bent portion and a method of bonding the rubber member to the metal base member using an adhesive.
- the rubber member may be directly sandwiched between the bent portions, or if the rubber is expanded rubber, the embodiment shown in FIG. As described above, the rubber member may be sandwiched between the bent portions via the front-side contact plate with the front-side contact plate interposed on the contact surface side of the rubber member.
- the metal base member has at least an elastic part, a movement restricting part, and a back pressing part.
- the elastic part, the movement restricting part, and the back pressing part may all be provided in one member.
- all or a part of the elastic portion, the movement restricting portion, and the back pressing portion may be provided in different members, and the metal base member may be configured by combining the members provided with these members.
- the cylinder bore wall warmer of the present invention moves in the vertical direction and the circumferential direction of the groove-shaped cooling water flow path due to vibration during operation of the internal combustion engine.
- the movement restricting portion since the movement restricting portion extends to the inside of the cooling water inlet, the movement restricting portion restricts the circumferential movement of the groove-shaped cooling water flow path. Is limited to a position where the lateral end of the section contacts the inner wall of the cooling water inlet.
- the movement restricting portion extends to the inside of the cooling water inlet, the downward movement of the heat retaining member of the cylinder bore wall of the present invention causes the inner surface of the cooling water inlet to move downward.
- the cooling water flowing from the cooling water inlet flows through the upper surface of the movement restricting portion, and then flows toward the lower side of the groove-shaped cooling water flow path, and flows laterally of the movement restricting portion. Is pushed from the upper side by the water flow of the cooling water, so that the flow of the cooling water restricts the upward movement of the heat retaining member of the cylinder bore wall of the present invention.
- the cooling water inflow extends toward the inside lower part, and the position of the extending end is the position of the outer wall surface of the groove-shaped cooling water flow path.
- the provision of the movement restricting portion at the outermost position restricts the movement of the cylinder-wall warmer of the present invention in the vertical direction and the circumferential direction of the groove-shaped cooling water flow path.
- An internal combustion engine according to an embodiment of the present invention is provided with the cylinder bore wall heat retaining device of the present invention.
- the vehicle of the present invention is a vehicle having the internal combustion engine of the present invention.
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Abstract
An insulator for a cylinder bore wall for thermally insulating a bore wall opposing an inflow opening for introducing cooling water in a groove-shaped cooling water flow channel, said insulator having: a rubber member that contacts a wall surface on the cylinder-bore side of the groove-shaped cooling water flow channel, and is for covering the wall surface on the cylinder-bore side of the groove-shaped cooling water flow channel; and a metal base body member to which the rubber member is secured. The metal base body member has: a back surface pressing part; an elastic part; and a movement-restricting part which extends from the back surface of the metal base body member toward a lower portion on the inside of the cooling water inflow opening of a cylinder block, the position of the extension end of which is on the outside of the position of the wall surface on the outside of the groove-shaped cooling water flow channel, and which restricts movement of the metal base body member. Thus, it is possible to provide an insulator for thermally insulating a cylinder bore wall opposing an inflow opening for introducing cooling water in a groove-shaped cooling water flow channel, said insulator capable of restricting movement in the up-down direction and the circumferential direction of a groove-shaped cooling water flow channel.
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 tool disposed in contact with a wall surface of a cylinder block wall of a cylinder block of an internal combustion engine on a groove-shaped cooling water flow path side, 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 an internal combustion engine, the fuel explodes at the top dead center of the piston in the bore, and the explosion pushes down the piston. Due to this structure, the temperature on the upper side of the cylinder bore wall increases and the temperature on the lower side decreases. Therefore, a difference occurs 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 expands less.
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 between the piston and the cylinder bore wall increases, which causes a reduction in fuel efficiency. Therefore, it is required to reduce the difference in the amount of 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 groove-shaped cooling water flow path, and the flow of the cooling water in the groove-shaped cooling water flow path is adjusted, so that the cylinder bore wall by the cooling water is formed. Attempts have been made to control the upper cooling efficiency and the lower cooling efficiency. For example, Patent Literature 1 discloses a flow that divides a groove-shaped cooling heat medium flow path into a plurality of flow paths by being arranged in a groove-shaped cooling heat medium flow path formed in a cylinder block of an internal combustion engine. A road partitioning member, formed at a height less than the 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 channel dividing member that becomes a wall portion to be divided into the heat medium for forming the groove-shaped cooling heat medium from the flow channel dividing member toward the opening of the groove-shaped cooling heat medium flow channel; By being formed of a flexible material beyond one inner surface of the flow path, after the completion of the insertion into the groove-shaped cooling heat medium flow path, the leading edge portion is bent by its own bending and restoring force. By contacting the inner surface at an intermediate position in the depth direction of the groove-shaped cooling heat medium flow path, the bore-side flow path and the opposite A flexible lip member that separates the A-side passage, the internal combustion engine cooling heat medium flow passage partition member comprising the disclosed.
引用文献1の内燃機関冷却用熱媒体流路区画部材によれば、ある程度のシリンダボア壁の壁温の均一化が図れるので、シリンダボア壁の上側と下側との熱変形量の違いを少なくすることができるものの、シリンダボア壁の全体に対し画一的な制御しか行えない。
According to the heat medium flow passage partitioning member for cooling the internal combustion engine of the cited document 1, the wall temperature of the cylinder bore wall can be made uniform to some extent, so that the difference in the amount of thermal deformation between the upper side and the lower side of the cylinder bore wall is reduced. However, only uniform control can be performed on the entire cylinder bore wall.
ところが、シリンダボア壁全体が、同様な温度状況になることはなく、実際には、保温が必要なところもあれば、保温が必要でないところも存在する。そのようなことから、例えば、特許文献2には、シリンダボアのうち、1つのシリンダボアのボア壁だけを選択的に保温するための保温具が開示されている。
However, the temperature of the entire cylinder bore wall does not reach the same temperature condition. Actually, there are places where heat insulation is required and places where heat insulation is not required. For this reason, for example, Patent Literature 2 discloses a heat retaining device for selectively retaining only the bore wall of one cylinder bore among the cylinder bores.
シリンダブロックの溝状冷却水流路への冷却水の流入口近辺のシリンダボア壁の近傍には、温度が低い冷却水が流れ、且つ、冷却水の流れが速いため、他のシリンダボア壁に比べ、温度が下がり過ぎる。このことから、冷却水の流入口近辺のシリンダボア壁を選択的に保温する保温具を設置することが必要となる。そのために、冷却水の流入口に対向する部分の保温用のシリンダボア壁の保温具を設置することになる。
Cooling water with a low temperature flows near the cylinder bore wall near the inlet of the cooling water to the grooved cooling water flow path of the cylinder block, and the flow of the cooling water is high. Is too low. For this reason, it is necessary to install a heat retaining tool for selectively retaining the temperature of the cylinder bore wall near the inlet of the cooling water. For this purpose, a warming device of the cylinder bore wall for warming the portion facing the inlet of the cooling water is installed.
ところが、内燃機関の運転中は、エンジンには振動が加わるため、引用文献2のシリンダボア壁の保温具では、シリンダボア壁の保温具が上下方向又は溝状冷却水流路の周方向に移動して位置ずれを起こし易い。
However, during operation of the internal combustion engine, vibration is applied to the engine. Therefore, in the heat retaining device for the cylinder bore wall described in Patent Document 2, the heat retaining device for the cylinder bore wall moves in the vertical direction or the circumferential direction of the groove-shaped cooling water flow path. Easy to shift.
従って、本発明の課題は、シリンダブロックの溝状冷却水流路への冷却水の流入口に対向するシリンダボア壁を保温するための保温具であり、上下方向及び溝状冷却水流路の周方向への移動を制限することができる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 a heat retention device for keeping the temperature of a cylinder bore wall opposite to an inlet of cooling water to a groove-shaped cooling water flow path of a cylinder block, in a vertical direction and a circumferential direction of a groove-shaped cooling water flow path. It is an object of the present invention to provide a cylinder bore wall heat retaining device capable of restricting the movement of the cylinder bore.
上記課題は、以下の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に設置され、該溝状冷却水流路への冷却水の流入口に対向するボア壁を保温するための保温具であり、
該溝状冷却水流路のシリンダボア側の壁面に接触し、該溝状冷却水流路のシリンダボア側の壁面を覆うためのゴム部材と、該ゴム部材が固定される金属基体部材と、を有し、
該金属基体部材は、該ゴム部材全体を背面側から該溝状冷却水流路のシリンダボア側の壁面に向かって押し付けるための背面押し付け部と、該溝状冷却水流路のシリンダボア側の壁面に向かって、該背面押し付け部が該ゴム部材を押し付けるように付勢する弾性部と、該金属基体部材の背面から該シリンダブロックの該冷却水の流入口の内側の下部に向かって延出し、延出端の位置が該溝状冷却水流路の外側の壁面の位置より外であり、該金属基体部材の移動を制限するための移動制限部と、を有すること、
を特徴とするシリンダボア壁の保温具を提供するものである。 The above problem is solved by the present invention described below.
That is, the present invention (1) is provided in the groove-shaped cooling water flow path of the cylinder block of the internal combustion engine having the cylinder bore, for keeping the temperature of the bore wall facing the inlet of the cooling water into the grooved cooling water flow path. Is a warmer,
A rubber member for contacting the cylinder bore side wall surface of the groove-shaped cooling water flow path and covering the cylinder bore side wall surface of the groove-shaped cooling water flow path, and a metal base member to which the rubber member is fixed,
The metal base member has a rear pressing portion for pressing the entire rubber member from the rear side toward the wall surface on the cylinder bore side of the groove-shaped cooling water flow path, and a rear surface pressing portion for pressing the entire rubber member toward the wall surface on the cylinder bore side of the grooved cooling water flow path. An elastic portion that urges the rear surface pressing portion to press the rubber member, and extends from a rear surface of the metal base member toward a lower portion inside the cooling water inlet of the cylinder block, and an extending end. Position is outside the position of the outer wall surface of the groove-shaped cooling water flow path, having a movement restricting portion for restricting the movement of the metal base member,
It is intended to provide a cylinder bore wall heat insulator characterized by the following.
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に設置され、該溝状冷却水流路への冷却水の流入口に対向するボア壁を保温するための保温具であり、
該溝状冷却水流路のシリンダボア側の壁面に接触し、該溝状冷却水流路のシリンダボア側の壁面を覆うためのゴム部材と、該ゴム部材が固定される金属基体部材と、を有し、
該金属基体部材は、該ゴム部材全体を背面側から該溝状冷却水流路のシリンダボア側の壁面に向かって押し付けるための背面押し付け部と、該溝状冷却水流路のシリンダボア側の壁面に向かって、該背面押し付け部が該ゴム部材を押し付けるように付勢する弾性部と、該金属基体部材の背面から該シリンダブロックの該冷却水の流入口の内側の下部に向かって延出し、延出端の位置が該溝状冷却水流路の外側の壁面の位置より外であり、該金属基体部材の移動を制限するための移動制限部と、を有すること、
を特徴とするシリンダボア壁の保温具を提供するものである。 The above problem is solved by the present invention described below.
That is, the present invention (1) is provided in the groove-shaped cooling water flow path of the cylinder block of the internal combustion engine having the cylinder bore, for keeping the temperature of the bore wall facing the inlet of the cooling water into the grooved cooling water flow path. Is a warmer,
A rubber member for contacting the cylinder bore side wall surface of the groove-shaped cooling water flow path and covering the cylinder bore side wall surface of the groove-shaped cooling water flow path, and a metal base member to which the rubber member is fixed,
The metal base member has a rear pressing portion for pressing the entire rubber member from the rear side toward the wall surface on the cylinder bore side of the groove-shaped cooling water flow path, and a rear surface pressing portion for pressing the entire rubber member toward the wall surface on the cylinder bore side of the grooved cooling water flow path. An elastic portion that urges the rear surface pressing portion to press the rubber member, and extends from a rear surface of the metal base member toward a lower portion inside the cooling water inlet of the cylinder block, and an extending end. Position is outside the position of the outer wall surface of the groove-shaped cooling water flow path, having a movement restricting portion for restricting the movement of the metal base member,
It is intended to provide a cylinder bore wall heat insulator characterized by the following.
また、本発明(2)は、前記ゴム部材が、感熱膨張ゴム又は水膨潤ゴムであることを特徴とする(1)のシリンダボア壁の保温具を提供するものである。
The present invention (2) provides the cylinder bore wall heat retaining device according to (1), wherein the rubber member is a heat-expandable rubber or a water-swellable rubber.
また、本発明(3)は、溝状冷却水流路内に(1)又は(2)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。
The present invention (3) provides an internal combustion engine characterized in that a heat retaining member for the cylinder bore wall of either (1) or (2) is provided in the groove-shaped cooling water flow path.
また、本発明(4)は、(3)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。
The present invention (4) provides an automobile having the internal combustion engine of (3).
本発明によれば、シリンダブロックの溝状冷却水流路への冷却水の流入口に対向するシリンダボア壁を保温するための保温具であり、上下方向及び溝状冷却水流路の周方向への移動を制限することができる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, it is a heat retention tool for keeping the temperature of the cylinder bore wall facing the inflow of the cooling water into the grooved cooling water flow path of the cylinder block, and moves vertically and circumferentially of the grooved cooling water flow path. Can be provided.
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15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は、シリンダブロックの冷却水の流入口を上から見た図であり、図5は、シリンダブロックの冷却水の流入口を、溝状冷却水流路側から見た図であり、図6は、冷却水の供給口を外側から見た図である。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模式的な斜視図である。図8は、図7中のシリンダボア壁の保温具30を感熱膨張ゴム側から見た図である。図9は、図7中のシリンダボア壁の保温具30を背面側から見た図である。図10は、図7中のシリンダボア壁の保温具30を上から見た図である。図11は、図10のx-x線端面図である。図12及び図13は、図7中のシリンダボア壁の保温具30の各部材の重ね合わせ方を示す図である。図14は、図7中の弾性部付設部材31を金属板から作成するための切り落とし部分を示す図である。図15は、図7中の正面側当て板34を金属板から作成するための切り落とし部分を示す図である。
シ リ ン ダ The cylinder bore wall warmer of the present invention and the internal combustion engine of the present invention will be described with reference to FIGS. FIGS. 1 to 3 show an embodiment of a cylinder block on which a cylinder bore wall warmer of the present invention is installed, and FIG. 1 shows a cylinder block on which a cylinder bore wall warmer 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. FIG. 4 is a view of the cooling water inlet of the cylinder block as viewed from above, FIG. 5 is a view of the cooling water inlet of the cylinder block as viewed from the groove-shaped cooling water flow path side, and FIG. FIG. 4 is a diagram of a cooling water supply port viewed from the outside. FIG. 7 is a schematic perspective view showing an embodiment of the cylinder bore wall heat retaining device of the present invention. FIG. 8 is a view of the heat retaining member 30 on the cylinder bore wall in FIG. 7 as viewed from the heat-sensitive expansion rubber side. FIG. 9 is a view of the heat retaining member 30 of the cylinder bore wall in FIG. 7 as viewed from the rear side. FIG. 10 is a diagram of the cylinder bore wall warmer 30 in FIG. 7 as viewed from above. FIG. 11 is an end view taken along line xx of FIG. FIG. 12 and FIG. 13 are diagrams showing how to overlap the members of the heat retaining tool 30 on the cylinder bore wall in FIG. FIG. 14 is a view showing a cut-off portion for forming the elastic member 31 in FIG. 7 from a metal plate. FIG. 15 is a diagram showing a cut-off portion for forming the front-side butt plate 34 in FIG. 7 from a metal plate.
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14へ冷却水を供給するための冷却水の供給経路15及び冷却水を溝状冷却水流路14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 a piston to move up and down, and a coolant for flowing a cooling water into an open-deck type cylinder block 11 of a vehicle-mounted internal combustion engine in which a heat retaining device for a cylinder bore wall is installed. Is formed. The wall that separates the bore 12 from the groove-shaped cooling water flow path 14 is the cylinder bore wall 13. In the cylinder block 11, a cooling water supply path 15 for supplying cooling water to the grooved cooling water flow path 14 and a cooling water discharge port 16 for discharging cooling water from the grooved cooling water flow path 14 are formed. Have been.
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。端ボア12a1と中間ボア12b1の間の壁、中間ボア12b1と中間ボア12b2の間の壁及び中間ボア12b2と端ボア12a2の間の壁(ボア間壁191)は、2つのボアに挟まれる部分なので、2つのシリンダボアから熱が伝わるため、他の壁に比べ壁温が高くなる。そのため、溝状冷却水流路14のシリンダボア側の壁面17では、ボア間壁191の近傍が、温度が最も高くなるので、溝状冷却水流路14のシリンダボア側の壁面17のうち、各シリンダボアのボア壁の境界192及びその近傍の温度が最も高くなる。
シ リ ン ダ In the cylinder block 11, two or more bores 12 are formed so as to be arranged in series. Therefore, the bore 12 includes end bores 12a1 and 12a2 adjacent to one bore and intermediate bores 12b1 and 12b2 sandwiched between the two bores (the number of bores in the cylinder block is two. In this case, only the end bore is used.) Among 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. The wall between the end bore 12a1 and the intermediate bore 12b1, the wall between the intermediate bore 12b1 and the intermediate bore 12b2, and the wall between the intermediate bore 12b2 and the end bore 12a2 (inter-bore wall 191) are portions sandwiched between the two bores. Therefore, since heat is transmitted from the two cylinder bores, the wall temperature is higher than the other walls. For this reason, in the wall surface 17 on the cylinder bore side of the groove-shaped cooling water flow path 14, the temperature becomes highest near the inter-bore wall 191. The temperature at and near the wall boundary 192 is highest.
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、溝状冷却水流路の外側の壁面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 a wall surface 17 on the cylinder bore side of the grooved cooling water flow path. The wall surface of the cooling water flow path opposite to the wall surface 17 on the cylinder bore side is referred to as an outer wall surface 18 of the groove-shaped cooling water flow path.
シリンダブロック11に形成されている冷却水の供給経路15は、外からシリンダブロック11内へ冷却水を供給するための冷却水の供給口151と、シリンダブロック11内へ供給される冷却水が、一旦供給される冷却水の前段供給室152と、冷却水を前段供給室152から溝状冷却水流路14内へ流入させるための冷却水の流入口153と、からなる。また、シリンダブロック11には、冷却水を溝状冷却水流路14からシリンダブロック11の外に排出するための冷却水の排出口16が設けられている。
The cooling water supply path 15 formed in the cylinder block 11 includes a cooling water supply port 151 for supplying cooling water from the outside to the cylinder block 11 and a cooling water supplied to the cylinder block 11. The cooling water supply system includes a front-stage supply chamber 152 for cooling water once supplied, and an inlet 153 for cooling water for flowing the cooling water from the front-stage supply chamber 152 into the groove-shaped cooling water flow path 14. Further, the cylinder block 11 is provided with a cooling water discharge port 16 for discharging the cooling water from the groove-shaped cooling water flow path 14 to the outside of the cylinder block 11.
そして、内燃機関の運転中、冷却水の供給口151からシリンダブロック11に供給された冷却水は、前段供給室152を経て、冷却水の流入口153より、溝状冷却水流路14内に流れ込み、図1中、紙面上の上側の溝状冷却水流路14と、下側の溝状冷却水流路14とに分かれ、冷却水の排出口16に向かって流れ、冷却水の排出口16からシリンダブロック11の外に排出される。
During operation of the internal combustion engine, the cooling water supplied from the cooling water supply port 151 to the cylinder block 11 flows into the groove-shaped cooling water flow path 14 from the cooling water inlet 153 through the pre-stage supply chamber 152. In FIG. 1, an upper groove-like cooling water flow path 14 on the paper surface and a lower groove-like cooling water flow path 14 are divided and flow toward a cooling water discharge port 16. It is discharged out of the block 11.
図7~図11に示すシリンダボア壁の保温具30は、図1中、シリンダブロック11に設けられている冷却水の流入口153に対向するボア壁、すなわち、シリンダボア12a2のボア壁20を保温するための保温具である。そのため、シリンダボア壁の保温具30は、冷却水の流入口153の近傍の溝状冷却水流路14に設置される。
A cylinder bore wall heat retaining device 30 shown in FIGS. 7 to 11 keeps the bore wall facing the cooling water inlet 153 provided in the cylinder block 11 in FIG. 1, that is, the bore wall 20 of the cylinder bore 12a2 warm. It is a warming tool for. Therefore, the heat retaining tool 30 of the cylinder bore wall is provided in the groove-shaped cooling water flow path 14 near the cooling water inlet 153.
シリンダボア壁の保温具30は、金属板バネ37及び移動制限金属板38が付設されており、上から見た時に円弧状に成形されている弾性部付設部材31と、上から見た時に円弧状に成形されている背面側押し付け部材32と、感熱膨張ゴム33と、上から見た時に円弧状に成形されている正面側当て板34と、が順に重ね合わされ、弾性部付設部材31の上端に形成されている折り曲げ部35a、弾性部付設部材31の下端に形成されている折り曲げ部35b、弾性部付設部材31の右端に形成されている折り曲げ部36a、及び弾性部付設部材31の左端に形成されている折り曲げ部36bが、図8に示すように、正面側当て板34側に折り曲げられて、折り曲げ部35a、35b、36a、36bと弾性部付設部材31との間に、背面側押し付け部材32、感熱膨張ゴム33及び正面側当て板34が挟み込まれることにより、作製される。つまり、シリンダボア壁の保温具30は、感熱膨張ゴム33と、弾性部付設部材31、背面押し付け部材32及び正面側当て板34からなる金属基体部材29と、を有する。なお、図7に示す形態例では、弾性部付設部材31、背面押し付け部材32及び正面側当て板34が共同して、感熱膨張ゴム33を固定しているので、弾性部付設部材31、背面押し付け部材32及び正面側当て板34が金属基体部材である。
The cylinder bore wall heat retaining member 30 has a metal leaf spring 37 and a movement limiting metal plate 38 attached thereto, and has an elastic portion attaching member 31 formed in an arc shape when viewed from above, and an arc-shaped member 31 when viewed from above. A rear-side pressing member 32, a heat-sensitive expansion rubber 33, and a front-side backing plate 34, which is formed in an arc shape when viewed from above, are sequentially superimposed on each other. The bent portion 35a formed, the bent portion 35b formed at the lower end of the elastic portion attaching member 31, the bent portion 36a formed at the right end of the elastic portion attaching member 31, and the left end of the elastic portion attaching member 31 As shown in FIG. 8, the bent portion 36 b is bent toward the front-side backing plate 34, and the back portion is provided between the bent portions 35 a, 35 b, 36 a, 36 b and the elastic portion attaching member 31. Side pressing member 32, by thermal expansion rubber 33 and the front contact plate 34 is sandwiched, it is produced. That is, the heat retaining member 30 of the cylinder bore wall has the thermal expansion rubber 33 and the metal base member 29 including the elastic portion attaching member 31, the back pressing member 32, and the front side contact plate 34. In the embodiment shown in FIG. 7, the elastic portion attaching member 31, the rear pressing member 32, and the front side contact plate 34 jointly fix the thermal expansion rubber 33. The member 32 and the front side supporting plate 34 are metal base members.
感熱膨張ゴム33は、溝状冷却水流路内で感熱膨張し、シリンダボア12a2のボア壁20に直接接触して、ボア壁20の保温箇所を覆い、ボア壁20を保温するための部材である。
The thermal expansion rubber 33 is a member that thermally expands in the groove-shaped cooling water flow path, directly contacts the bore wall 20 of the cylinder bore 12a2, covers a heat retaining portion of the bore wall 20, and keeps the bore wall 20 warm.
背面側押し付け部材32は、上から見たときに、円弧状に成形されており、感熱膨張ゴム33の全体を感熱膨張ゴム33の背面側から押し付けることができるように、感熱膨張ゴム33の背面側(接触面26側とは反対側の面)に沿う形状である。
The rear-side pressing member 32 is formed in an arc shape when viewed from above, and is formed on the rear surface of the thermal expansion rubber 33 so that the entire thermal expansion rubber 33 can be pressed from the rear side of the thermal expansion rubber 33. Side (the surface opposite to the contact surface 26).
また、弾性部付設部材31は、上から見たときに、円弧状に成形されており、背面側押し付け部材32の背面側(感熱膨張ゴム33とは反対側の面)に沿う形状である。弾性部付設部材31には、弾性部である金属板バネ37と、移動制限部である移動制限金属板38と、が付設されている。金属板バネ37は、縦長の長方形の金属板であり、長手方向の一端が弾性部付設部材31に繋がっている。金属板バネ37は、弾性部付設部材31に繋がっている一端側で、弾性部付設部材31から折り曲げられることにより、他端側が弾性部付設部材31から離れるように、弾性部付設部材33に付設されている。金属板バネ37の他端側は、当接部371が溝状冷却水流路の外側の壁面18に接触するように、当接部371の位置で折り曲げられている。移動制限金属板38は、矩形の金属板であり、弾性部付設部材31の背面側から外側に向かって水平方向に延出するように、弾性部付設部材33に付設されている。
The elastic member 31 is formed in an arc shape when viewed from above, and has a shape along the rear surface of the rear pressing member 32 (the surface opposite to the thermal expansion rubber 33). The elastic portion attaching member 31 is provided with a metal leaf spring 37 as an elastic portion and a movement limiting metal plate 38 as a movement limiting portion. The metal plate spring 37 is a vertically long rectangular metal plate, and one end in the longitudinal direction is connected to the elastic portion attaching member 31. The metal leaf spring 37 is attached to the elastic member 33 so that the other end is separated from the elastic member 31 by being bent from the elastic member 31 at one end connected to the elastic member 31. Have been. The other end of the metal leaf spring 37 is bent at the position of the contact portion 371 such that the contact portion 371 contacts the outer wall surface 18 of the groove-shaped cooling water flow path. The movement restricting metal plate 38 is a rectangular metal plate, and is attached to the elastic member 33 so as to extend horizontally from the back side of the elastic member 31 to the outside.
正面側当て板34は、上から見た時に円弧状に成形されており、正面側から見た時に、矩形状の開口301が形成されている。そして、弾性部付設部材31の上端に形成されている折り曲げ部35a、弾性部付設部材31の下端に形成されている折り曲げ部35b、弾性部付設部材31の右端に形成されている折り曲げ部36a、及び弾性部付設部材31の左端に形成されている折り曲げ部36bが、正面側当て板34側に折り曲げられて、弾性部付設部材31と折り曲げ部35a、35b、36a、36bとの間に、背面側押し付け部材32、感熱膨張ゴム33及び正面側当て板34が挟み込まれることにより、これらの部材が固定されている。なお、感熱膨張ゴム33では、背面側押し付け部材32側とは反対側の面が、溝状冷却水流路のシリンダボア側の壁面17に接する接触面26である。
The front-side backing plate 34 is formed in an arc shape when viewed from above, and has a rectangular opening 301 when viewed from the front side. Then, a bent portion 35a formed at the upper end of the elastic member 31, a bent portion 35b formed at the lower end of the elastic member 31, a bent portion 36a formed at the right end of the elastic member 31, A bent portion 36b formed on the left end of the elastic portion attaching member 31 is bent toward the front-side backing plate 34, and a back surface is provided between the elastic portion attaching member 31 and the bent portions 35a, 35b, 36a, 36b. These members are fixed by sandwiching the side pressing member 32, the thermal expansion rubber 33, and the front side backing plate 34. In the thermal expansion rubber 33, the surface opposite to the rear-side pressing member 32 is the contact surface 26 that is in contact with the wall surface 17 on the cylinder bore side of the groove-shaped cooling water flow path.
シリンダボア壁の保温具30が、シリンダブロック11の溝状冷却水流路14に設置されたときに、溝状冷却水流路14のシリンダボア側の壁面17に、感熱膨張ゴム33が膨張して接触し、感熱膨張ゴム33で溝状冷却水流路14のシリンダボア側の壁面17を覆う。このとき、感熱膨張ゴム33とは反対側に向けて張り出している金属板バネ37が、シリンダボア側の壁面17とは反対側の壁面、すなわち、溝状冷却水流路14の外側の壁面18に接触し、付勢力を生じさせる。そして、生じた金属板バネ37の付勢力で、背面押し付け部材32が、感熱膨張ゴム33を、背面側から溝状冷却水流路14のシリンダボア側の壁面17に向けて押し付けるので、感熱膨張ゴム33が溝状冷却水流路14のシリンダボア側の壁面17に密着される。
When the heat retaining member 30 of the cylinder bore wall is installed in the groove-shaped cooling water flow path 14 of the cylinder block 11, the heat-sensitive expansion rubber 33 expands and comes into contact with the wall surface 17 on the cylinder bore side of the groove-shaped cooling water flow path 14, The wall surface 17 on the cylinder bore side of the groove-shaped cooling water flow path 14 is covered with the thermal expansion rubber 33. At this time, the metal plate spring 37 projecting toward the side opposite to the thermal expansion rubber 33 contacts the wall surface opposite to the wall surface 17 on the cylinder bore side, that is, the outer wall surface 18 of the groove-shaped cooling water flow path 14. And generate an urging force. Then, the rear surface pressing member 32 presses the thermal expansion rubber 33 from the rear side toward the wall surface 17 on the cylinder bore side of the groove-shaped cooling water flow path 14 by the generated urging force of the metal leaf spring 37. Is in close contact with the wall surface 17 of the groove-shaped cooling water flow path 14 on the cylinder bore side.
シリンダボア壁の保温具30の作製手順について説明する。図12及び図13に示すように、感熱膨張ゴム33の接触面側に正面側当て板34を合わせ、感熱膨張ゴム33の背面側に、背面押し付け部材32と、金属板バネ37、移動制限金属板38及び折り曲げ部35a、35b、36a、36bが形成されている弾性部付設部材31と、を順に合わせ、次いで、折り曲げ部35a、35b、36a、36bを折り曲げて、図7~図11に示すように、弾性部付設部材31と、折り曲げ部35a、35b、36a、36bとで、背面押し付け部材32、感熱膨張ゴム33及び正面側当て板34を挟み込ませることにより、弾性部付設部材31、背面押し付け部材32及び正面当て板34からなる金属基体部材29に、感熱膨張ゴム33を固定して、シリンダボア壁の保温具30を作製する。
A procedure for manufacturing the cylinder bore wall heat retaining device 30 will be described. As shown in FIGS. 12 and 13, the front contact plate 34 is aligned with the contact surface of the thermal expansion rubber 33, and the rear pressing member 32, the metal plate spring 37, and the movement limiting metal are disposed on the rear side of the thermal expansion rubber 33. The plate 38 and the elastic member 31 provided with the bent portions 35a, 35b, 36a, 36b are sequentially joined together, and then the bent portions 35a, 35b, 36a, 36b are bent, as shown in FIGS. 7 to 11. As described above, the back pressing member 32, the thermal expansion rubber 33, and the front side contact plate 34 are sandwiched between the elastic portion attaching member 31 and the bent portions 35a, 35b, 36a, 36b, so that the elastic portion attaching member 31, the back surface The thermal expansion rubber 33 is fixed to the metal base member 29 composed of the pressing member 32 and the front backing plate 34, and the cylinder bore wall heat insulator 30 is manufactured.
なお、弾性部付設部材33の作製手順であるが、図14に示すように、金属板51を用意し、図14中の斜線で記した部分を切り落として、金属板バネ37、移動制限金属板38、折り曲げ部35a、35b、36a、36bを形成させて、金属板の打ち抜き物52を作製する。次いで、金属板の打ち抜き物52全体を円弧状に成形し、且つ、金属板バネ37を背面側に張り出すように曲げ、更に、金属板バネ37の先端側を折り曲げ、移動制限金属板38を水平方向に延出するように曲げることにより、弾性部付設部材31を作製する。また、正面側当て板33の作製手順であるが、図15に示すように、金属板53を用意し、図15中の斜線で記した部分を切り落として、開口301を形成させて、金属板の打ち抜き物54を作製する。次いで、金属板の打ち抜き物54を円弧状に成形することにより、正面側当て板34を作製する。
The procedure for manufacturing the elastic member 33 is as follows. As shown in FIG. 14, a metal plate 51 is prepared, and the hatched portion in FIG. 38, the bent portions 35a, 35b, 36a, 36b are formed, and a punched product 52 of a metal plate is produced. Next, the whole punched material 52 of a metal plate is formed into an arc shape, and the metal plate spring 37 is bent so as to protrude to the rear side. Further, the distal end side of the metal plate spring 37 is bent, and the movement limiting metal plate 38 is formed. The elastic portion attaching member 31 is manufactured by bending so as to extend in the horizontal direction. Also, as shown in FIG. 15, a metal plate 53 is prepared, and a hatched portion in FIG. 15 is cut off to form an opening 301. The punched material 54 is manufactured. Next, the front side backing plate 34 is manufactured by forming the punched object 54 of a metal plate into an arc shape.
シリンダボア壁の保温具30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に設置される。図16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30を設置する様子を示す模式図である。図16に示すように、シリンダボア壁の保温具30を、シリンダブロック11の溝状冷却水流路14のうち、冷却水の流入口153が形成されている位置に挿入して、図17及び図18に示すように、シリンダボア壁の保温具30を、溝状冷却水流路14に設置する。このとき、図17及び図18に示すように、シリンダボア壁の保温具30の移動制限金属板38が、冷却水の流入口153に入り込むように、シリンダボア壁の保温具30を設置する。
温 The cylinder wall warmer 30 is installed, for example, in the groove-shaped coolant flow passage 14 of the cylinder block 11 shown in FIG. FIG. 16 is a schematic diagram showing a state in which a cylinder bore wall warming device 30 is installed in the cylinder block 11 shown in FIG. As shown in FIG. 16, the heat retaining tool 30 of the cylinder bore wall is inserted into the groove-shaped cooling water flow path 14 of the cylinder block 11 at a position where the cooling water inlet 153 is formed, and FIG. As shown in (1), the heat retaining tool 30 of the cylinder bore wall is installed in the groove-shaped cooling water flow path 14. At this time, as shown in FIG. 17 and FIG. 18, the cylinder bore wall heat insulator 30 is installed such that the movement limiting metal plate 38 of the cylinder bore wall heat insulator 30 enters the coolant inlet 153.
図17及び図18に示すように、溝状冷却水流路14内に冷却水が供給される前の状態において、移動制限金属板38は、冷却水の流入口153に内側の下部に向かって延出しており、移動制限金属板38の延出端382は、溝状冷却水流路14の外側の壁面18の位置より外に位置している。なお、図17及び図18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30が設置されている様子を示す模式図であり、シリンダボア壁の保温具30の設置位置近傍の拡大図であり、図17は平面図であり、図18は端面図である。
As shown in FIGS. 17 and 18, in a state before the cooling water is supplied into the groove-shaped cooling water flow path 14, the movement limiting metal plate 38 extends to the inside of the cooling water inlet 153 toward the inner lower part. The extension end 382 of the movement limiting metal plate 38 is located outside the position of the outer wall surface 18 of the groove-shaped cooling water flow path 14. FIGS. 17 and 18 are schematic views showing a state in which the cylinder block wall warming device 30 is installed in the cylinder block 11 shown in FIG. 1. FIG. 17 is an enlarged view near the installation position of the cylinder bore wall warming device 30. FIG. 17 is a plan view, and FIG. 18 is an end view.
その後、シリンダボア壁の保温具30が、シリンダブロック11の溝状冷却水流路14内に設置された後、内燃機関が運転されると、感熱膨張ゴム33が加熱されて、感熱膨張する。そして、図19に示すように、感熱膨張ゴム33は、正面側当て板34の内側部分に形成されている開口301を通って、シリンダボア側の壁面17に向かって膨張し、接触面26がシリンダボア側の壁面17に接触する。接触面26がシリンダボア側の壁面17に接触した後も、感熱膨張ゴム33は膨張を続け、開放状態まで膨張しようとする。そのため、金属板バネ37の当接部371には、弾性部付設部材31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37は、当接部371が弾性部付設部材31側に近づくように変形するので、金属板バネ37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、弾性部付設部材31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、弾性部付設部材31により押された背面側押し付け部材32により、感熱膨張ゴム33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30が、溝状冷却水流路14に設置され、感熱膨張ゴム33が加熱されて感熱膨張することにより、金属板バネ37が変形し、その変形が戻ろうとして生じる弾性力により、感熱膨張ゴム33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、背面側押し付け部材32が付勢される。このようにして、シリンダボア壁の保温具30の感熱膨張ゴム33が、溝状冷却水流路のシリンダボア側の壁面17に接触する。図19は、図18中の感熱膨張ゴム33が膨張してボア壁に接触している様子を示す図である。
After that, when the heat retaining member 30 of the cylinder bore wall is installed in the groove-shaped cooling water flow path 14 of the cylinder block 11, when the internal combustion engine is operated, the thermal expansion rubber 33 is heated and thermally expanded. Then, as shown in FIG. 19, the thermal expansion rubber 33 expands toward the cylinder bore side wall surface 17 through the opening 301 formed in the inner portion of the front side backing plate 34, and the contact surface 26 becomes in contact with the cylinder bore. Contacts the side wall surface 17. Even after the contact surface 26 contacts the wall surface 17 on the cylinder bore side, the thermal expansion rubber 33 continues to expand and tends to expand to the open state. Therefore, a force is applied to the contact portion 371 of the metal leaf spring 37 in a direction toward the elastic portion attaching member 31. Accordingly, the metal leaf spring 37 is deformed so that the contact portion 371 approaches the elastic portion attaching member 31 side, so that the metal leaf spring 37 has an elastic force to return to the original state. By this elastic force, the elastic portion attaching member 31 is pushed toward the wall surface 17 on the cylinder bore side of the groove-shaped cooling water flow path, and as a result, by the rear side pushing member 32 pushed by the elastic portion attaching member 31, The thermal expansion rubber 33 is pressed against the wall surface 17 on the cylinder bore side of the groove-shaped cooling water flow path. In other words, the heat retaining member 30 of the cylinder bore wall is installed in the groove-shaped cooling water flow path 14, and the thermal expansion rubber 33 is heated and thermally expanded, whereby the metal leaf spring 37 is deformed, and the elasticity generated when the deformation tends to return. The rear-side pressing member 32 is urged by the force so as to press the thermal expansion rubber 33 against the wall surface 17 on the cylinder bore side of the groove-shaped cooling water flow path. In this way, the heat-sensitive expansion rubber 33 of the heat retaining device 30 on the cylinder bore wall comes into contact with the wall surface 17 on the cylinder bore side of the groove-shaped cooling water flow path. FIG. 19 is a view showing a state where the heat-sensitive expansion rubber 33 in FIG. 18 is expanded and is in contact with the bore wall.
図19に示すように、内燃機関が運転されて、感熱膨張ゴム33が膨張した後の状態において、移動制限金属板38は、冷却水の流入口153に内側の下部に向かって延出しており、移動制限金属板38の延出端382は、溝状冷却水流路14の外側の壁面18の位置より外に位置している。
As shown in FIG. 19, in a state after the internal combustion engine is operated and the heat-sensitive expansion rubber 33 expands, the movement limiting metal plate 38 extends toward the inner lower part of the cooling water inlet 153. The extension end 382 of the movement limiting metal plate 38 is located outside the position of the outer wall surface 18 of the groove-shaped cooling water flow path 14.
次に、内燃機関の運転中のシリンダボア壁の保温具の移動の制限について説明する。図20に示すように、内燃機関の運転中の振動によって、シリンダボア壁の保温具30は、横方向では、符号41で示す溝状冷却水流路の周方向に動く。しかし、冷却水の流入口153の内側まで、シリンダボア壁の保温具30の移動制限金属板38が延出しているので、移動制限金属板38により、図20中の溝状冷却水流路の周方向左側へのシリンダボア壁の保温具30の移動が、移動制限金属板38の横側端部381aが冷却水の流入口153の内壁154aに接触する位置までに制限される。同様に、移動制限金属板38により、図20中の溝状冷却水流路の周方向右側へのシリンダボア壁の保温具30の移動が、移動制限金属板38の横側端部381bが冷却水の流入口153の内壁154bに接触する位置までに制限される。
Next, a description will be given of the restriction on the movement of the heat retaining member on the cylinder bore wall during operation of the internal combustion engine. As shown in FIG. 20, due to vibration during operation of the internal combustion engine, the heat retaining tool 30 on the cylinder bore wall moves in the lateral direction in the circumferential direction of the groove-shaped cooling water flow path indicated by reference numeral 41. However, since the movement restricting metal plate 38 of the heat retaining tool 30 on the cylinder bore wall extends to the inside of the cooling water inlet 153, the movement restricting metal plate 38 allows the circumferential direction of the groove-shaped cooling water flow path in FIG. The movement of the heat retaining member 30 of the cylinder bore wall to the left is limited to a position where the lateral end 381a of the movement limiting metal plate 38 contacts the inner wall 154a of the cooling water inlet 153. Similarly, the movement limiting metal plate 38 causes the movement of the heat retaining tool 30 of the cylinder bore wall to the right in the circumferential direction of the groove-shaped cooling water flow path in FIG. It is limited to a position where it contacts the inner wall 154b of the inflow port 153.
また、図21に示すように、内燃機関の運転中の振動によって、シリンダボア壁の保温具30は、符号42で示す上下方向に動く。しかし、冷却水の流入口153の内側まで、シリンダボア壁の保温具30の移動制限金属板38が延出しているので、図21中の下方向へのシリンダボア壁の保温具30の移動が、移動制限金属板38の下面383が冷却水の流入口153の内壁155に接触することで制限される。
Also, as shown in FIG. 21, vibration during operation of the internal combustion engine causes the heat retaining tool 30 on the cylinder bore wall to move up and down as indicated by reference numeral 42. However, since the movement-restricting metal plate 38 of the cylinder bore wall warmer 30 extends to the inside of the cooling water inlet 153, the movement of the cylinder bore wall warmer 30 in the downward direction in FIG. The lower surface 383 of the limiting metal plate 38 is limited by contact with the inner wall 155 of the cooling water inlet 153.
更に、図20及び図21に示すように、冷却水40は、前段供給室152から冷却水の流入口153に向かった後、移動制限金属板38の延出端382から、移動制限金属板38の横側端部381a、bに向け、移動制限金属板38の上面を流れた後、溝状冷却水流路14の下側に向かって流れる。そのため、移動制限金属板38の上側から、移動制限金属板38の横側を通って、下向きに流れる冷却水の水流により、移動制限金属板38は、上側から押されられるような状態となる。そして、このような冷却水の流れにより、図21中の上方向へのシリンダボア壁の保温具30の移動が制限される。
Further, as shown in FIGS. 20 and 21, the cooling water 40 flows from the front-stage supply chamber 152 to the cooling water inlet 153, and then extends from the extension end 382 of the movement limiting metal plate 38 to the movement limiting metal plate 38. After flowing on the upper surface of the movement restricting metal plate 38 toward the lateral end portions 381a and 381b, the cooling water flows toward the lower side of the groove-shaped cooling water flow path 14. Therefore, the movement-limiting metal plate 38 is pushed from above by the water flow of the cooling water flowing downward from the upper side of the movement-limiting metal plate 38 to the side of the movement-limiting metal plate 38. Then, the flow of the cooling water restricts the upward movement of the warming device 30 of the cylinder bore wall in FIG. 21.
以上のように、シリンダボア壁の保温具30の背面側に、冷却水の流入口153に内側の下部に向かって延出し、延出端382の位置が溝状冷却水流路14の外側の壁面18の位置より外となる移動制限金属板38が付設されていることにより、シリンダボア壁の保温具30が、上下方向及び溝状冷却水流路の周方向に移動することが制限される。図20及び図21は、内燃機関の運転中のシリンダボア壁の保温具30の移動及び冷却水の流れを示す模式図であり、シリンダボア壁の保温具30の設置位置近傍の拡大図であり、図20は平面図であり、図21は端面図である。
As described above, the cooling water inflow port 153 extends toward the lower part on the back side of the heat retaining tool 30 on the cylinder bore wall, and the extension end 382 is positioned at the outer wall surface 18 of the groove-shaped cooling water flow path 14. The movement-restricting metal plate 38 outside the position is attached to restrict the movement of the heat retaining member 30 on the cylinder bore wall in the vertical direction and the circumferential direction of the groove-shaped cooling water flow path. FIG. 20 and FIG. 21 are schematic diagrams showing movement of the warming device 30 on the cylinder bore wall and the flow of cooling water during operation of the internal combustion engine, and are enlarged views of the vicinity of the installation position of the warming device 30 on the cylinder bore wall. 20 is a plan view, and FIG. 21 is an end view.
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に設置され、該溝状冷却水流路への冷却水の流入口に対向するボア壁を保温するための保温具であり、
該溝状冷却水流路のシリンダボア側の壁面に接触し、該溝状冷却水流路のシリンダボア側の壁面を覆うためのゴム部材と、該ゴム部材が固定される金属基体部材と、を有し、
該金属基体部材は、該ゴム部材全体を背面側から該溝状冷却水流路のシリンダボア側の壁面に向かって押し付けるための背面押し付け部と、該溝状冷却水流路のシリンダボア側の壁面に向かって、該背面押し付け部材が該ゴム部材を押し付けるように付勢する弾性部と、該金属基体部材の背面から該シリンダブロックの該冷却水の流入口の内側の下部に向かって延出し、延出端の位置が該溝状冷却水流路の外側の壁面の位置より外であり、該金属基体部材の移動を制限するための移動制限部と、を有すること、
を特徴とするシリンダボア壁の保温具である。 A heat retaining device for a cylinder bore wall of the present invention is provided in a groove-shaped cooling water flow path of a cylinder block of an internal combustion engine having a cylinder bore, for keeping the bore wall opposed to an inlet of cooling water into the grooved cooling water flow path warm. Is a warmer,
A rubber member for contacting the cylinder bore side wall surface of the groove-shaped cooling water flow path and covering the cylinder bore side wall surface of the groove-shaped cooling water flow path, and a metal base member to which the rubber member is fixed,
The metal base member has a rear pressing portion for pressing the entire rubber member from the rear side toward the wall surface on the cylinder bore side of the groove-shaped cooling water flow path, and a rear surface pressing portion for pressing the entire rubber member toward the wall surface on the cylinder bore side of the grooved cooling water flow path. An elastic portion for urging the rear pressing member to press the rubber member, and extending from a rear surface of the metal base member toward a lower portion inside the cooling water inlet of the cylinder block; Position is outside the position of the outer wall surface of the groove-shaped cooling water flow path, and having a movement restricting portion for restricting the movement of the metal base member,
A heat insulator for a cylinder bore wall.
該溝状冷却水流路のシリンダボア側の壁面に接触し、該溝状冷却水流路のシリンダボア側の壁面を覆うためのゴム部材と、該ゴム部材が固定される金属基体部材と、を有し、
該金属基体部材は、該ゴム部材全体を背面側から該溝状冷却水流路のシリンダボア側の壁面に向かって押し付けるための背面押し付け部と、該溝状冷却水流路のシリンダボア側の壁面に向かって、該背面押し付け部材が該ゴム部材を押し付けるように付勢する弾性部と、該金属基体部材の背面から該シリンダブロックの該冷却水の流入口の内側の下部に向かって延出し、延出端の位置が該溝状冷却水流路の外側の壁面の位置より外であり、該金属基体部材の移動を制限するための移動制限部と、を有すること、
を特徴とするシリンダボア壁の保温具である。 A heat retaining device for a cylinder bore wall of the present invention is provided in a groove-shaped cooling water flow path of a cylinder block of an internal combustion engine having a cylinder bore, for keeping the bore wall opposed to an inlet of cooling water into the grooved cooling water flow path warm. Is a warmer,
A rubber member for contacting the cylinder bore side wall surface of the groove-shaped cooling water flow path and covering the cylinder bore side wall surface of the groove-shaped cooling water flow path, and a metal base member to which the rubber member is fixed,
The metal base member has a rear pressing portion for pressing the entire rubber member from the rear side toward the wall surface on the cylinder bore side of the groove-shaped cooling water flow path, and a rear surface pressing portion for pressing the entire rubber member toward the wall surface on the cylinder bore side of the grooved cooling water flow path. An elastic portion for urging the rear pressing member to press the rubber member, and extending from a rear surface of the metal base member toward a lower portion inside the cooling water inlet of the cylinder block; Position is outside the position of the outer wall surface of the groove-shaped cooling water flow path, and having a movement restricting portion for restricting the movement of the metal base member,
A heat insulator for a cylinder bore wall.
本発明のシリンダボア壁の保温具は、内燃機関のシリンダブロックの溝状冷却水流路に設置される。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。シリンダブロックが、シリンダボアが直列に2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の場合、シリンダブロックは、2つの端ボアからなるシリンダボアを有している。また、シリンダブロックが、シリンダボアが直列に3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の場合、シリンダブロックは、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。
温 The cylinder wall warmer of the present invention is installed in the groove-shaped cooling water flow path of the cylinder block of the internal combustion engine. The cylinder block on which the cylinder bore wall heat retaining device of the present invention is installed is an open deck type cylinder block in which two or more cylinder bores are formed in series. When the cylinder block is an open deck type cylinder block in which two cylinder bores are formed in series, the cylinder block has a cylinder bore having two end bores. When the cylinder block is an open deck type cylinder block in which three or more cylinder bores are formed in series, the cylinder block has a cylinder bore having two end bores and one or more intermediate bores. ing. In the present invention, among the cylinder bores arranged in series, bores at both ends are called end bores, and a bore sandwiched between other cylinder bores on both sides is called an intermediate bore.
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には、冷却水を流すための溝状冷却水流路が形成されている。ボアと溝状冷却水流路とを区切る壁が、シリンダボア壁である。そして、シリンダブロックには、溝状冷却水流路へ冷却水を供給するための冷却水の供給経路及び冷却水を溝状冷却水流路から排出するための冷却水の排出口が形成されている。冷却水の供給経路のうち、シリンダブロック内に冷却水を供給するための冷却水の供給口の位置及び形状、溝状冷却水流路への冷却水の流入口の位置及び形状、冷却水の供給口と冷却水の流入口とを繋ぐ経路の形状等は、適宜選択される。シリンダボア壁の上方ほど、温度が高くなるので、冷却水の流入口の上下方向の位置は、通常、溝状冷却水流路の上方である。また、通常、シリンダブロックへの冷却水の供給口は、下方に設けられている。また、通常、シリンダブロックへの冷却水の供給口の位置と、溝状冷却水流路への冷却水の流入口の位置とは、上下方向の位置が異なるので、それらを繋ぐ経路(図1に示す形態例では、冷却水の前段供給室152)が設けられている。
{Circle around (4)} A groove-shaped cooling water flow path for flowing cooling water is formed in the cylinder block on which the heat retaining device of the cylinder bore wall of the present invention is installed. The wall that separates the bore from the groove-shaped cooling water flow path is a cylinder bore wall. The cylinder block is provided with a cooling water supply path for supplying cooling water to the grooved cooling water flow path and a cooling water discharge port for discharging cooling water from the grooved cooling water flow path. Of the cooling water supply path, the position and shape of the cooling water supply port for supplying the cooling water into the cylinder block, the position and shape of the cooling water inlet to the groove-shaped cooling water flow path, the supply of the cooling water The shape of the path connecting the inlet and the cooling water inlet is appropriately selected. Since the temperature is higher above the cylinder bore wall, the vertical position of the cooling water inlet is usually above the groove-shaped cooling water flow path. Further, the supply port of the cooling water to the cylinder block is usually provided below. Also, since the position of the cooling water supply port to the cylinder block and the position of the cooling water inflow port to the groove-shaped cooling water flow path are usually different in the vertical direction, a path connecting them (see FIG. 1). In the embodiment shown, a pre-stage supply chamber 152) for cooling water is provided.
冷却水の流入口から流入した直後の冷却水は温度が低く、冷却水の流入口の近傍の溝状冷却水流路の流れは速いため、冷却水の流入口に対向するシリンダボア壁は、他のボア壁に比べ、冷却され過ぎることになる。そこで、本発明のシリンダボア壁の保温具は、冷却水の流入口に対向するシリンダボア壁が冷却され過ぎないようにするために、設置される。そのため、本発明のシリンダボア壁の保温具が設置される位置は、溝状冷却水流路のうち、冷却水の流入口が形成されている位置の近傍である。本発明のシリンダボア壁の保温具により保温するシリンダボア壁の上下方向の位置、ゴム部材の大きさ及び設置範囲は、適宜選択される。
Since the temperature of the cooling water immediately after flowing from the cooling water inlet is low and the flow of the groove-shaped cooling water flow path near the cooling water inlet is fast, the cylinder bore wall opposed to the cooling water inlet has another wall. It will be overcooled compared to the bore wall. Therefore, the cylinder bore wall heat retaining device of the present invention is installed in order to prevent the cylinder bore wall facing the cooling water inlet from being excessively cooled. For this reason, the position where the heat retaining device of the cylinder bore wall of the present invention is installed is near the position where the cooling water inlet is formed in the groove-shaped cooling water flow path. The vertical position of the cylinder bore wall, the size of the rubber member, and the installation range to be kept warm by the cylinder bore wall warming tool of the present invention are appropriately selected.
本発明のシリンダボア壁の保温具は、ゴム部材と、金属基体部材と、を有する。
シ リ ン ダ The cylinder bore wall heat retainer of the present invention has a rubber member and a metal base member.
ゴム部材は、溝状冷却水流路のシリンダボア側の壁面に直接接して、溝状冷却水流路のシリンダボア側の壁面を覆い、シリンダボア壁を保温する部材であり、弾性部の付勢力で、金属基体部材によって、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。そのため、このゴム部材は、上から見たときに、溝状冷却水流路のシリンダボア側の壁面のうち、冷却水の流入口に対向する壁面に沿う形状、つまり、円弧状の形状に成形されている。また、ゴム部材を横から見たときの形状は、ゴム部材で覆わせようとする溝状冷却水流路のシリンダボア側の壁面の部分に合わせて、適宜選択される。
The rubber member is a member that directly contacts the wall surface on the cylinder bore side of the groove-shaped cooling water flow path, covers the wall surface on the cylinder bore side of the groove-shaped cooling water flow path, and keeps the cylinder bore wall warm. The member is pressed against the wall surface on the cylinder bore side of the groove-shaped cooling water flow path. Therefore, when viewed from above, the rubber member is formed into a shape along the wall surface facing the cooling water inlet, of the wall surface on the cylinder bore side of the groove-shaped cooling water flow path, that is, an arc-shaped shape. I have. The shape of the rubber member when viewed from the side is appropriately selected according to the wall surface on the cylinder bore side of the groove-shaped cooling water passage to be covered with the rubber member.
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。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。なお、ゴム部材の材質が、溝状冷却水流路内で膨張しない材質の場合は、付勢力は専ら弾性部により生じ、また、ゴム部材の材質が、溝状冷却水流路内で膨張する材質の場合は、付勢力は弾性部と膨張ゴムの共同により生じる。
材質 Examples of the material of the rubber member include rubber such as solid rubber, expanded rubber, foamed rubber, and soft rubber, and a silicone-based gel material. When installing the heat retaining device for the cylinder bore wall in the groove-shaped cooling water flow path, the rubber member comes into strong contact with the cylinder bore wall, so that the rubber member can be prevented from being shaved. A heat-sensitive rubber or a water-swellable rubber capable of expanding the rubber member portion in the groove-shaped cooling water flow path later is preferable. When the material of the rubber member is a material that does not expand in the groove-shaped cooling water flow path, the biasing force is generated exclusively by the elastic portion, and the material of the rubber member is a material that expands in the groove-shaped cooling water flow path. In this case, the biasing force is generated by the joint of the elastic portion and the expanded rubber.
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。
組成 Examples of the composition of the solid rubber include natural rubber, butadiene rubber, ethylene propylene diene rubber (EPDM), nitrile butadiene rubber (NBR), silicone rubber, and fluoro rubber.
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。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。
(4) Examples of the expanded rubber include a thermally expanded rubber. The thermal expansion rubber is a composite obtained by impregnating a base foam material with a thermoplastic material having a lower melting point than the base foam material and compressing the same.At normal temperature, the compressed state is maintained at least by a cured product of the thermoplastic material present in the surface layer. In addition, the cured material of the thermoplastic material is softened by heating to release the compressed state. Examples of the thermal expansion rubber include a thermal expansion rubber described in JP-A-2004-143262. In the case where the material of the rubber member is a thermal expansion rubber, the heat retaining member of the cylinder bore wall of the present invention is installed in the groove-shaped cooling water flow path, and heat is applied to the thermal expansion rubber, so that the thermal expansion rubber expands to a predetermined temperature. It expands and deforms to the shape of.
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-sensitive expansion rubber include various polymer materials such as rubber, elastomer, thermoplastic resin, and thermosetting resin. Specific examples include natural rubber, chloropropylene rubber, styrene butadiene rubber, and nitrile. Various thermosetting resins such as butadiene rubber, ethylene propylene diene terpolymer, various synthetic rubbers such as silicone rubber, fluorine rubber and acrylic rubber, various elastomers such as soft urethane, hard urethane, phenol resin, and melamine resin. Can be
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 relating to the heat-expandable rubber, one having any of a glass transition point, a melting point, and a softening temperature of less than 120 ° C is preferable. Examples of the thermoplastic substance relating to the thermal expansion rubber include polyethylene, polypropylene, polystyrene, polyvinyl chloride, polyvinylidene chloride, polyvinyl acetate, polyacrylate, styrene butadiene copolymer, chlorinated polyethylene, polyvinylidene fluoride, and ethylene acetate. Vinyl copolymer, ethylene vinyl acetate vinyl chloride acrylate copolymer, ethylene vinyl acetate acrylic ester copolymer, ethylene vinyl acetate vinyl chloride copolymer, nylon, acrylonitrile butadiene copolymer, polyacrylonitrile, polyvinyl chloride Thermoplastic resin such as polychloroprene, polybutadiene, thermoplastic polyimide, polyacetal, polyphenylene sulfide, polycarbonate, 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。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。
In addition, examples of the expanded rubber include a 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 shape retention properties that absorbs water, swells, and maintains an expanded shape. Examples of the water-swellable rubber include, for example, a crosslinked product of a polyacrylic acid neutralized product, a crosslinked product of a starch acrylic acid graft copolymer, a crosslinked carboxymethylcellulose salt, and a rubber material in which a water-absorbing substance such as polyvinyl alcohol is added to the rubber. No. Examples of the water-swellable rubber include a water-swellable rubber containing a ketiminated polyamide resin, a glycidyl etherified product, a water-absorbing resin and rubber described in JP-A-9-208752. When the material of the rubber member is water-swellable rubber, the heat retaining tool of the cylinder bore wall of the present invention is installed in the groove-shaped cooling water flow path, the cooling water is flown, and the water-swellable rubber absorbs water. The swellable rubber expands and expands 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、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 foamed rubber include a sponge-like foamed rubber having an open-cell structure, a foamed rubber having a closed-cell structure, and a semi-closed foamed rubber. Specific examples of the material of the foamed rubber include an ethylene propylene diene terpolymer, a silicone rubber, a nitrile butadiene copolymer, a silicone rubber, a fluorine rubber and the like. The foaming rate of the foamed rubber is not particularly limited, is appropriately selected, and the moisture content of the rubber member can be adjusted by adjusting the foaming rate. 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.
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、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、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。
In the case where the material of the rubber member is a material that can contain water, such as water-swellable rubber and foamed rubber, the heat retaining tool for the cylinder bore wall of the present invention is installed in the groove-shaped cooling water flow path, When the cooling water is caused to flow, the rubber member contains water. The range of the water content of the rubber member when the cooling water flows through the groove-shaped cooling water flow path is appropriately selected depending on the operating conditions of the internal combustion engine and the like. The water content refers to a weight water content represented by (cooling water weight / (filler weight + cooling water weight)) × 100.
ゴム部材の形状及び厚みは、特に制限されず、適宜選択される。
形状 The shape and thickness of the rubber member are not particularly limited, and are appropriately selected.
金属基体部材は、ゴム部材が固定される部材である。金属基体部材は、少なくとも、背面押し付け部と、弾性部と、移動制限部と、を有する。金属基体部材は、背面押し付け部、弾性部及び移動制限部が一体となった部材からなっていてもよいし、2以上の部材の組み合わせからなっていてもよい。例えば、図7に示す形態例のように、金属基体部材は、背面押し付け部となる部材と、ゴム部材を固定するための固定部(折り曲げ部、正面側当て板等)、弾性部及び移動制限部が設けられている部材との組み合わせからなるものであってもよいし、あるいは、背面押し付け部となる部材に、ゴム部材を固定するための固定部(折り曲げ部、正面側当て板等)が形成され、弾性部及び移動制限部が、溶接等により付設されたものであってもよい。
The metal base member is a member to which the rubber member is fixed. The metal base member has at least a back pressing part, an elastic part, and a movement restricting part. The metal base member may be a member in which the back surface pressing portion, the elastic portion, and the movement restricting portion are integrated, or may be a combination of two or more members. For example, as in the embodiment shown in FIG. 7, the metal base member includes a member serving as a rear surface pressing portion, a fixing portion (a bent portion, a front side contact plate, etc.) for fixing a rubber member, an elastic portion, and movement restriction. It may be composed of a combination with a member provided with a portion, or a fixing portion (a bent portion, a front side contact plate, etc.) for fixing a rubber member to a member serving as a rear pressing portion may be provided. The elastic portion and the movement restricting portion may be formed and provided by welding or the like.
金属基体部材の材質は、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。
材質 The material of the metal base member is not particularly limited, but stainless steel (SUS), an aluminum alloy or the like is preferable in terms of good LLC resistance and high strength.
背面押し付け部は、ゴム部材全体を背面側から溝状冷却水流路のシリンダボア壁側の壁面に向かって押し付けるための部分である。背面押し付け部は、上から見たときに、円弧状であり、ゴム部材の全体をゴム部材の背面側から押し付けることができるように、ゴム部材の背面側(接触面側とは反対側の面)に沿う形状であり、ゴム部材の背面側全体又はほぼ背面側全体を覆う形状である。背面押し付け部の厚みは、適宜選択される。背面押し付け部の材質は、適宜選択されるが、ステンレス鋼、アルミニウム合金等の金属板が好ましい。
The back pressing portion is a portion for pressing the entire rubber member from the back side toward the wall surface on the cylinder bore wall side of the groove-shaped cooling water flow path. The rear pressing portion has an arc shape when viewed from above, and the rear side of the rubber member (the surface opposite to the contact surface side) so that the entire rubber member can be pressed from the rear side of the rubber member. ), And covers the entire back side or almost the entire back side of the rubber member. The thickness of the back pressing portion is appropriately selected. The material of the back pressing portion is appropriately selected, but a metal plate such as stainless steel or an aluminum alloy is preferable.
弾性部は、本発明のシリンダボア壁の保温具の背面側に付設されている。この弾性部は、本発明のシリンダボア壁の保温具が、溝状冷却水流路に設置されることにより、弾性変形し、溝状冷却水流路のシリンダボア側の壁面に向かって、背面押し付け部材がゴム部材を押し付けるように、弾性力により付勢するための部材である。
The elastic portion is provided on the cylinder bore wall of the present invention on the rear side of the heat retaining member. This elastic portion is elastically deformed by the heat retaining member of the cylinder bore wall of the present invention being installed in the groove-shaped cooling water flow path, and the rear surface pressing member is rubberized toward the cylinder bore side wall surface of the groove-shaped cooling water flow path. This is a member for urging by an elastic force so as to press the member.
弾性部は、本発明のシリンダボア壁の保温具に少なくとも1つ付設されていればよいが、本発明のシリンダボア壁の保温具を上から見たときに、本発明のシリンダボア壁の保温具の円弧方向に、2つ以上付設されていることが好ましく、3つ以上付設されていることが特に好ましい。
It is sufficient that at least one elastic portion is provided on the cylinder bore wall heat insulator of the present invention. When the cylinder bore wall heat insulator of the present invention is viewed from above, the arc of the cylinder bore wall heat insulator of the present invention is obtained. Preferably, two or more are provided in the direction, and particularly preferably, three or more are provided.
弾性部の形態は、特に制限されず、例えば、板状の弾性部材、コイル状の弾性部材、重ね板バネ、トーションバネ、弾性ゴム等が挙げられる。弾性部としては、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が好ましい。
形態 The form of the elastic portion is not particularly limited, and examples thereof include a plate-like elastic member, a coil-like elastic member, a leaf spring, a torsion spring, and an elastic rubber. As the elastic portion, a metal elastic member such as a metal leaf spring, a coil spring, a laminated leaf spring, and a torsion spring is preferable.
弾性部としては、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に接する部分及びその近傍が、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に対して膨出する曲面状に成形されていることが、本発明のシリンダボア壁の保温具を溝状冷却水流路内に挿入するときに、弾性部の壁面との接触部分により、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が傷付けられるのを防ぐことができる点で好ましい。
As the elastic portion, the portion in contact with the wall surface of the groove-shaped cooling water flow path opposite to the wall surface on the cylinder bore side and the vicinity thereof protrude from the wall surface of the groove-shaped cooling water flow path opposite to the wall surface on the cylinder bore side. When the heat retaining member of the cylinder bore wall of the present invention is inserted into the groove-shaped cooling water flow path, the contact portion with the wall surface of the elastic portion causes the groove-shaped cooling water flow path to be formed on the cylinder bore side. This is preferable in that the wall surface opposite to the wall surface can be prevented from being damaged.
本発明のシリンダボア壁の保温具では、溝状冷却水流路に設置されたときに、弾性部により、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、弾性部の形態、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 tool of the cylinder bore wall of the present invention, when installed in the groove-shaped cooling water flow path, the elastic member allows the rubber member to be urged with an appropriate pressing force, so that the shape of the groove-shaped cooling water flow path is adjusted. In addition, the form, shape, size, installation position, number of installations, and the like of the elastic portion are appropriately selected.
図7に示すシリンダボア壁の保温具30では、弾性部付設部材と弾性部である金属板バネが一体成形され、金属板バネが形成されている弾性部付設部材に、ゴム部材及び背面押し付け部材が固定されることにより、弾性部がシリンダボア壁の保温具に付設されているが、シリンダボア壁の保温具に弾性部を付設する方法は、特に制限されない。他の方法としては、例えば、金属板バネ、金属コイルバネ、重ね板バネ又はトーションバネ等の金属製の弾性部材を金属板からなる背面押し付け部材に溶接し、弾性部が溶接された背面押し付け部材に、ゴム部材を固定する方法等が挙げられる。
In the cylinder wall warmer 30 shown in FIG. 7, the elastic member and the metal plate spring as the elastic member are integrally formed, and the rubber member and the rear surface pressing member are formed on the elastic member with the metal plate spring. By being fixed, the elastic portion is attached to the heat retaining member of the cylinder bore wall, but the method of attaching the elastic portion to the heat retaining member of the cylinder bore wall is not particularly limited. As another method, for example, a metal elastic member such as a metal leaf spring, a metal coil spring, a laminated leaf spring or a torsion spring is welded to a back pressing member made of a metal plate, and the elastic portion is welded to the back pressing member. And a method of fixing a rubber member.
移動制限部は、本発明のシリンダボア壁の保温具の背面側に付設されている。この移動制限部は、内燃機関の運転時において、延出端側の部分が、冷却水の流入口の内側の下部に入り込んでいる。つまり、内燃機関の運転時において、移動制限部の延出端は、溝状冷却水流路の外側の壁面よりも外に位置している。移動制限部は、延出端側の部分が、冷却水の流入口の内側の下部に入り込むことにより、本発明のシリンダボア壁の保温具が、内燃機関の運転時の振動により、溝状冷却水流路内で動くのを制限するための部材である。
The movement restricting portion is provided on the cylinder bore wall of the present invention on the rear side of the heat retaining member. During operation of the internal combustion engine, a portion on the extension end side of the movement restriction portion enters a lower portion inside the cooling water inlet. That is, during operation of the internal combustion engine, the extending end of the movement restricting portion is located outside the outer wall surface of the groove-shaped cooling water flow path. The movement restricting portion is configured such that the portion on the extension end side enters the lower portion inside the cooling water inflow port, so that the heat retaining tool of the cylinder bore wall of the present invention causes the groove cooling water flow to flow due to vibration during operation of the internal combustion engine. It is a member for restricting movement on the road.
移動制限部の形状は、本発明のシリンダボア壁の保温具の背面側から、冷却水の流入口の内側の下部に向けて延出し、延出端の位置が溝状冷却水流路の外側の壁面よりも外になる形状であれば、特に制限されず、例えば、矩形の板状、延出端側の側部が横に張り出しているT字状の板状やL字状の板状等の形状が挙げられる。
The shape of the movement restricting portion extends from the rear side of the heat retaining member of the cylinder bore wall of the present invention toward the lower portion inside the cooling water inlet, and the position of the extending end is the outer wall surface of the groove-shaped cooling water flow path. The shape is not particularly limited as long as it is a shape that is more outward than the shape. For example, a rectangular plate shape, a T-shaped plate shape, an L-shaped plate shape, etc. Shape.
移動制限部の材質は、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。
材質 The material of the movement restricting portion is not particularly limited, but stainless steel (SUS), an aluminum alloy, or the like is preferable in terms of good LLC resistance and high strength.
本発明のシリンダボア壁の保温具の背面側における、移動制限部の設置位置は、特に制限されず、冷却水の流入口の形成位置や形状により、適宜選択される。
The installation position of the movement restricting portion on the rear side of the heat retaining tool of the cylinder bore wall of the present invention is not particularly limited, and is appropriately selected depending on the position and shape of the cooling water inlet.
金属基体部材に、ゴム部材を固定する方法としては、特に制限されず、例えば、金属基体部材に折り曲げ部を設け(図7に示す形態例では、金属基体部材の構成部材である弾性部付設部材に折り曲げ部を設け)、金属基体部材と折り曲げ部とで、ゴム部材を挟み込むことにより固定する方法、金属基体部材に、接着剤を用いて、ゴム部材を貼り合せる方法などが挙げられる。また、金属基体部材に設けられている折り曲げ部で、ゴム部材を挟み込む場合、折り曲げ部でゴム部材を直接挟み込ませてもよいし、あるいは、ゴムが膨張ゴムであれば、図7に示す形態例のように、ゴム部材の接触面側に正面側当て板を介在させて、正面側当て板を介して、折り曲げ部でゴム部材を挟み込ませてもよい。
The method for fixing the rubber member to the metal base member is not particularly limited. For example, a bent portion is provided on the metal base member (in the embodiment shown in FIG. 7, a member provided with an elastic portion, which is a constituent member of the metal base member). Is provided, a method of fixing the metal member by sandwiching the rubber member between the metal base member and the bent portion, and a method of bonding the rubber member to the metal base member using an adhesive. When the rubber member is sandwiched between the bent portions provided on the metal base member, the rubber member may be directly sandwiched between the bent portions, or if the rubber is expanded rubber, the embodiment shown in FIG. As described above, the rubber member may be sandwiched between the bent portions via the front-side contact plate with the front-side contact plate interposed on the contact surface side of the rubber member.
金属基体部材は、少なくとも、弾性部、移動制限部及び背面押し付け部を有する。弾性部、移動制限部及び背面押し付け部は、全てが1つの部材に設けられていてもよい。あるいは、弾性部、移動制限部及び背面押し付け部の全部又は一部が異なる部材に設けられており、それらが設けられている部材が組み合わされることにより、金属基体部材が構成されていてもよい。
The metal base member has at least an elastic part, a movement restricting part, and a back pressing part. The elastic part, the movement restricting part, and the back pressing part may all be provided in one member. Alternatively, all or a part of the elastic portion, the movement restricting portion, and the back pressing portion may be provided in different members, and the metal base member may be configured by combining the members provided with these members.
本発明のシリンダボア壁の保温具は、内燃機関の運転中の振動によって、上下方向と、溝状冷却水流路の周方向に動く。しかし、本発明のシリンダボア壁の保温具では、冷却水の流入口の内側まで、移動制限部が延出しているので、移動制限部により、溝状冷却水流路の周方向の移動が、移動制限部の横側端部が冷却水の流入口の内壁に接触する位置までに制限される。また、冷却水の流入口の内側まで、移動制限部が延出しているので、下方向への本発明のシリンダボア壁の保温具の移動が、移動制限部の下面が冷却水の流入口の内壁に接触することで制限される。また、冷却水の流入口から流入した冷却水が、移動制限部の上面を流れた後、溝状冷却水流路の下側に向かって、移動制限部の横側を流れることにより、移動制限部が、冷却水の水流により上側から押されられるような状態となるので、このような冷却水の流れにより、上方向への本発明のシリンダボア壁の保温具の移動が制限される。
温 The cylinder bore wall warmer of the present invention moves in the vertical direction and the circumferential direction of the groove-shaped cooling water flow path due to vibration during operation of the internal combustion engine. However, in the cylinder wall warmer of the present invention, since the movement restricting portion extends to the inside of the cooling water inlet, the movement restricting portion restricts the circumferential movement of the groove-shaped cooling water flow path. Is limited to a position where the lateral end of the section contacts the inner wall of the cooling water inlet. In addition, since the movement restricting portion extends to the inside of the cooling water inlet, the downward movement of the heat retaining member of the cylinder bore wall of the present invention causes the inner surface of the cooling water inlet to move downward. Is limited by contact with Further, the cooling water flowing from the cooling water inlet flows through the upper surface of the movement restricting portion, and then flows toward the lower side of the groove-shaped cooling water flow path, and flows laterally of the movement restricting portion. Is pushed from the upper side by the water flow of the cooling water, so that the flow of the cooling water restricts the upward movement of the heat retaining member of the cylinder bore wall of the present invention.
以上のように、本発明のシリンダボア壁の保温具の背面側に、冷却水の流入口に内側の下部に向かって延出し、延出端の位置が溝状冷却水流路の外側の壁面の位置より外の位置となる移動制限部が設けられていることにより、本発明のシリンダボア壁の保温具が、上下方向及び溝状冷却水流路の周方向に移動することが制限される。
As described above, on the back side of the heat retaining tool of the cylinder bore wall of the present invention, the cooling water inflow extends toward the inside lower part, and the position of the extending end is the position of the outer wall surface of the groove-shaped cooling water flow path. The provision of the movement restricting portion at the outermost position restricts the movement of the cylinder-wall warmer of the present invention in the vertical direction and the circumferential direction of the groove-shaped cooling water flow path.
本発明の形態の内燃機関は、本発明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である。
内燃 An internal combustion engine according to an embodiment of the present invention is provided with the cylinder bore wall heat retaining device of the present invention.
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 vehicle of the present invention is a vehicle having the internal combustion engine of the present invention.
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 冷却水の供給経路
16 冷却水排出口
17 溝状冷却水流路14のシリンダボア側の壁面
18 溝状冷却水流路14の外側の壁面
20 冷却水の流入口に対向するシリンダボア壁
26 接触面
29 金属基体部材
30 シリンダボア壁の保温具
31 弾性部付設部材
32 背面側押し付け部材
33 感熱膨張ゴム
34 正面側当て板
35a、35b、36a、36b 折り曲げ部
37 金属板バネ
38 移動制限金属板
40 冷却水
41 溝状冷却水流路の周方向
42 上下方向
51、53 金属板
52、54 金属板の打ち抜き物
151 冷却水の供給口
152 前段供給室
153 冷却水の流入口
154a、154b、155 冷却水の流入口の内壁
191 ボア間部
192 溝状冷却水流路のシリンダボア側の壁面の各シリンダボアのボア壁の境界
301 開口
371 当接部
381a、381b 横側端部
382 延出端
383 移動制限金属板の下面Reference Signs List 11 Cylinder block 12 Bore 12a1, 12a2 End bore 12b1, 12b2 Intermediate bore 13 Cylinder bore wall 14 Groove-shaped cooling water flow path 15 Cooling water supply path 16 Cooling water outlet 17 Wall surface of grooved cooling water flow path 14 on cylinder bore side 18 Groove shape Wall surface 20 outside cooling water flow path 14 Cylinder bore wall 26 facing cooling water inflow port Contact surface 29 Metal base member 30 Cylinder bore wall heat retaining member 31 Elastic member attached member 32 Back side pressing member 33 Thermal expansion rubber 34 Front side contact Plates 35a, 35b, 36a, 36b Bending portion 37 Metal plate spring 38 Movement restricting metal plate 40 Cooling water 41 Circumferential direction 42 of groove-shaped cooling water flow channel Vertical direction 51, 53 Metal plates 52, 54 Punched metal plate 1 1 Cooling Water Supply Port 152 Pre-stage Supply Chamber 153 Cooling Water Inlet 154a, 154b, 155 Cooling Water Inlet Inner Wall 191 Bore Intersection 192 Cylinder Bore Side Wall Wall Boundary 301 Opening 371 Contact portions 381a, 381b Lateral end 382 Extended end 383 Lower surface of movement-restricted metal plate
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 冷却水の供給経路
16 冷却水排出口
17 溝状冷却水流路14のシリンダボア側の壁面
18 溝状冷却水流路14の外側の壁面
20 冷却水の流入口に対向するシリンダボア壁
26 接触面
29 金属基体部材
30 シリンダボア壁の保温具
31 弾性部付設部材
32 背面側押し付け部材
33 感熱膨張ゴム
34 正面側当て板
35a、35b、36a、36b 折り曲げ部
37 金属板バネ
38 移動制限金属板
40 冷却水
41 溝状冷却水流路の周方向
42 上下方向
51、53 金属板
52、54 金属板の打ち抜き物
151 冷却水の供給口
152 前段供給室
153 冷却水の流入口
154a、154b、155 冷却水の流入口の内壁
191 ボア間部
192 溝状冷却水流路のシリンダボア側の壁面の各シリンダボアのボア壁の境界
301 開口
371 当接部
381a、381b 横側端部
382 延出端
383 移動制限金属板の下面
Claims (4)
- 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に設置され、該溝状冷却水流路への冷却水の流入口に対向するボア壁を保温するための保温具であり、
該溝状冷却水流路のシリンダボア側の壁面に接触し、該溝状冷却水流路のシリンダボア側の壁面を覆うためのゴム部材と、該ゴム部材が固定される金属基体部材と、を有し、
該金属基体部材は、該ゴム部材全体を背面側から該溝状冷却水流路のシリンダボア側の壁面に向かって押し付けるための背面押し付け部と、該溝状冷却水流路のシリンダボア側の壁面に向かって、該背面押し付け部が該ゴム部材を押し付けるように付勢する弾性部と、該金属基体部材の背面から該シリンダブロックの該冷却水の流入口の内側の下部に向かって延出し、延出端の位置が該溝状冷却水流路の外側の壁面の位置より外であり、該金属基体部材の移動を制限するための移動制限部と、を有すること、
を特徴とするシリンダボア壁の保温具。 A heat retaining tool that is provided in a groove-shaped cooling water flow path of a cylinder block of an internal combustion engine having a cylinder bore, and that heats a bore wall facing an inlet of cooling water to the grooved cooling water flow path,
A rubber member for contacting the cylinder bore side wall surface of the groove-shaped cooling water flow path and covering the cylinder bore side wall surface of the groove-shaped cooling water flow path, and a metal base member to which the rubber member is fixed,
The metal base member has a rear pressing portion for pressing the entire rubber member from the rear side toward the cylinder bore side wall surface of the grooved cooling water flow path, and a rear surface pressing portion for pressing the grooved cooling water flow path on the cylinder bore side wall surface. An elastic portion that urges the rear surface pressing portion to press the rubber member, and extends from a rear surface of the metal base member toward a lower portion inside the cooling water inlet of the cylinder block, and an extending end. Position is outside the position of the outer wall surface of the groove-shaped cooling water flow path, and having a movement restricting portion for restricting the movement of the metal base member,
A cylinder bore wall heat insulator. - 前記ゴム部材が、感熱膨張ゴム又は水膨潤ゴムであることを特徴とする請求項1記載のシリンダボア壁の保温具。 (4) The cylinder bore wall warming device according to (1), wherein the rubber member is a heat-sensitive expanding rubber or a water-swelling rubber.
- 溝状冷却水流路内に請求項1又は2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。 (3) An internal combustion engine, wherein the cylinder bore wall heat retaining device according to any one of (1) and (2) is installed in the groove-shaped cooling water flow path.
- 請求項3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 3.
Priority Applications (1)
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EP19850392.2A EP3839237A4 (en) | 2018-08-13 | 2019-07-26 | Cylinder bore wall insulator, internal combustion engine, and automobile |
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JP2018-152332 | 2018-08-13 | ||
JP2018152332A JP6793694B2 (en) | 2018-08-13 | 2018-08-13 | Cylinder bore wall warmers, internal combustion engines and automobiles |
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PCT/JP2019/029389 WO2020036052A1 (en) | 2018-08-13 | 2019-07-26 | Cylinder bore wall insulator, internal combustion engine, and automobile |
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EP (1) | EP3839237A4 (en) |
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JP4249668B2 (en) * | 2004-07-13 | 2009-04-02 | 内山工業株式会社 | Water jacket spacer |
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JP6340234B2 (en) * | 2014-04-11 | 2018-06-06 | ニチアス株式会社 | Cylinder bore wall insulation, internal combustion engine and automobile |
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2018
- 2018-08-13 JP JP2018152332A patent/JP6793694B2/en active Active
-
2019
- 2019-07-26 WO PCT/JP2019/029389 patent/WO2020036052A1/en unknown
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See also references of EP3839237A4 |
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EP3839237A4 (en) | 2022-04-13 |
JP2020026778A (en) | 2020-02-20 |
EP3839237A1 (en) | 2021-06-23 |
JP6793694B2 (en) | 2020-12-02 |
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