JPS6224777Y2 - - Google Patents
Info
- Publication number
- JPS6224777Y2 JPS6224777Y2 JP11511279U JP11511279U JPS6224777Y2 JP S6224777 Y2 JPS6224777 Y2 JP S6224777Y2 JP 11511279 U JP11511279 U JP 11511279U JP 11511279 U JP11511279 U JP 11511279U JP S6224777 Y2 JPS6224777 Y2 JP S6224777Y2
- Authority
- JP
- Japan
- Prior art keywords
- cylinder
- cylinder block
- cross
- section
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000002485 combustion reaction Methods 0.000 claims description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 23
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 230000008961 swelling Effects 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Landscapes
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Description
【考案の詳細な説明】
本考案は、水冷式内燃機関、特にシリンダヘツ
ド及びクランクケースが上部及び下部にそれぞれ
接合されるシリンダブロツクに横断面小判形また
は楕円形のシリンダ孔を、また前記シリンダヘツ
ドに同じく横断面小判形または楕円形の燃焼室を
それぞれ形成し、前記シリンダ孔周囲のシリンダ
ブロツクに水ジヤケツトを形成した形式の水冷式
内燃機関における機関本体の締付固定装置に関す
る。[Detailed Description of the Invention] The present invention provides a water-cooled internal combustion engine, in particular, a cylinder block having an oval or oval cross-sectional shape in a cylinder block to which a cylinder head and a crankcase are respectively joined to the upper and lower parts, and a cylinder hole having an oval or oval cross section. The present invention also relates to a tightening and fixing device for an engine body in a water-cooled internal combustion engine having combustion chambers each having an oval or elliptical cross section and a water jacket formed in a cylinder block around the cylinder hole.
上記形式の内燃機関では、シリンダ孔が横断面
小判形もしくは楕円形を呈している関係上、例え
ばシリンダヘツドに、燃焼室の横断面長手方向中
心線の一側及び他側においてそれぞれその長手方
向に並列して該燃焼室に開口する吸気通路群及び
排気通路群を形成した場合には、吸、排気弁口の
総開口面積をシリンダ孔の横断面積に対して相対
的に広く確保することができ、機関の吸、排気効
率を向上させることができる。ところがそのよう
な吸、排気通路の配置構造を採用した場合にはシ
リンダブロツク、ヘツド、クランクケースの三者
を一体に結合する通しボルトの締付位置が自から
制約を受け、例えば該通しボルトを、吸、排気通
路との干渉を避けるためにシリンダ孔の横断面長
手方向の両外方に配置する必要があるが、この場
合シリンダ孔の横断面長手方向に沿う両側壁近傍
の、シリンダブロツクとクランクケースとの接合
面の面圧が不足傾向となり、この面圧不足に起因
して該接合面からオイル或いは水洩れが起こるお
それがある。 In the above-mentioned type of internal combustion engine, since the cylinder hole has an oval or elliptical cross section, for example, the cylinder head is provided with a cylinder in the longitudinal direction on one side and the other side of the longitudinal center line of the cross section of the combustion chamber. When a group of intake passages and a group of exhaust passages that open into the combustion chamber are formed in parallel, the total opening area of the intake and exhaust valve ports can be secured to be large relative to the cross-sectional area of the cylinder hole. , the engine's intake and exhaust efficiency can be improved. However, when such an arrangement structure for the intake and exhaust passages is adopted, there are restrictions on the tightening position of the through bolts that connect the cylinder block, head, and crankcase together. In order to avoid interference with the intake and exhaust passages, it is necessary to place the cylinder block on both sides of the cylinder hole in the longitudinal direction of the cross section. The surface pressure at the joint surface with the crankcase tends to be insufficient, and this lack of surface pressure may cause oil or water to leak from the joint surface.
本考案は上記に鑑み提案されたもので、通しボ
ルトをシリンダ孔の横断面長手方向の両外方に配
置しても上記面圧不足を来たすことのない、コン
パクトな前記水冷式内燃機関における機関本体の
締付固定装置を提供することを目的とする。 The present invention has been proposed in view of the above, and is a compact engine for the water-cooled internal combustion engine, which does not cause the lack of surface pressure even if the through bolts are placed on both sides of the cylinder hole in the longitudinal direction of the cross section. The purpose of the present invention is to provide a device for tightening and fixing the main body.
そしてかかる目的を達成するために本考案は、
前記形式の水冷式内燃機関において、シリンダヘ
ツドには、前記燃焼室の横断面長手方向中心線の
一側及び他側においてそれぞれその長手方向に並
列して該燃焼室に開口する吸気通路群及び排気通
路群を形成し、前記吸，排気通路の下方において
シリンダブロツクの、シリンダヘツドとの接合面
には前記水ジヤケツトを直接開口し、その水ジヤ
ケツトの底壁を前記シリンダ孔の横断面長手方向
に沿う両側壁の近傍で貫通する複数本のボルト等
の第１固着具を以てシリンダブロツクとクランク
ケースとを一体に締付固定し、前記シリンダヘツ
ド、シリンダブロツク及びクランクケースの三者
を、前記シリンダ孔の横断面長手方向両外方にお
いて複数本の通しボルトによつて一体に固着した
ことを特徴とする。 In order to achieve this purpose, the present invention
In the water-cooled internal combustion engine of the type described above, the cylinder head includes a group of intake passages and an exhaust passage that open into the combustion chamber in parallel in the longitudinal direction on one side and the other side of the center line in the longitudinal direction of the cross section of the combustion chamber. A passage group is formed, and the water jacket is directly opened at the joint surface of the cylinder block with the cylinder head below the intake and exhaust passages, and the bottom wall of the water jacket is directed in the longitudinal direction of the cross section of the cylinder hole. The cylinder block and crankcase are tightened and fixed together using a first fixing device such as a plurality of bolts that pass through the vicinity of both side walls, and the cylinder head, cylinder block, and crankcase are connected to the cylinder hole. It is characterized by being fixed together with a plurality of through bolts on both outer sides in the longitudinal direction of the cross section.
以下、図面により本考案の一実施例について説
明すると、水冷式内燃機関の機関本体Ｅは、シリ
ンダブロツク１の上部にシリンダヘツド２を、ま
たその下部にクランクケース３を一体に固定して
構成される。シリンダブロツク１には横断面小判
形、または楕円形のシリンダ孔４が形成され、該
シリンダ孔４内には同じく横断面小判形または楕
円形のピストン５が摺動自在に嵌合され、該ピス
トン５は通常のようにコネクテイングロツド６を
介してクランクケース３内の、図示しないクラン
ク軸に連動される。 An embodiment of the present invention will be described below with reference to the drawings. The engine body E of a water-cooled internal combustion engine is constructed by integrally fixing a cylinder head 2 to the upper part of a cylinder block 1 and a crankcase 3 to the lower part thereof. Ru. A cylinder hole 4 having an oval or oval cross section is formed in the cylinder block 1, and a piston 5 having an oval or oval cross section is slidably fitted into the cylinder hole 4. 5 is interlocked with a crankshaft (not shown) within the crankcase 3 via a connecting rod 6 as usual.
シリンダブロツク１には、前記シリンダ孔４を
取囲むように水ジヤケツト７が形成され、この水
ジヤケツト７内には通常のように冷却水が循環さ
れる。前記水ジヤケツト７の横断面は第３図に明
瞭に示すように、環状の小判形もしくは楕円形に
形成され、その横断面長手方向に沿う両側部には
それぞれ長手方向に間隔を存して２個ずつ横断面
半円状の膨出部８が形成され、それらの膨出部８
内の底壁には、シリンダブロツク１の下面に開口
するボルト孔９がそれぞれ穿設されており、それ
らのボルト孔９には、前記クランクケース３上に
植設した第１固着具、すなわちスタツドボルト１
０が挿通され、これらのスタツドボルト１０の上
端は、前記水ジヤケツト７の膨出部８内に突出し
ており、そこにその膨出部８内に収容したナツト
１１を螺締することにより、クランクケース３上
にシリンダブロツク１を固着することができる。 A water jacket 7 is formed in the cylinder block 1 so as to surround the cylinder hole 4, and cooling water is circulated within the water jacket 7 as usual. As clearly shown in FIG. 3, the cross section of the water jacket 7 is formed into an annular oval or elliptical shape, and there are two holes on both sides along the longitudinal direction of the cross section, with intervals in the longitudinal direction. Swelling portions 8 each having a semicircular cross section are formed, and these swelling portions 8
Bolt holes 9 that open on the lower surface of the cylinder block 1 are formed in the bottom wall of the cylinder block 1, and a first fixing device installed on the crankcase 3, that is, a stud, is inserted into each of the bolt holes 9. bolt 1
The upper ends of these stud bolts 10 protrude into the bulge 8 of the water jacket 7, and by screwing the nut 11 housed in the bulge 8, the crank is tightened. The cylinder block 1 can be fixed on the case 3.
前記膨出部８間、即ち後述する吸気通路１７，
１７の相互間及び排気通路１８，１８の相互間に
おいて、シリンダブロツク１の外壁には、その外
壁を上下に貫通するボルト挿通孔１２が穿設され
ている。またシリンダブロツク１上に重合される
シリンダヘツド２には、前記ボルト挿通孔１２と
一致する位置に第２固着具、すなわちスタツドボ
ルト１４が植設される。このスタツドボルト１４
に前記ボルト挿通孔１２を挿通し、その下端にナ
ツト１３を螺着すると共に該ナツト１３をシリン
ダブロツク１の締付座面に係合させることによ
り、シリンダブロツク１上にシリンダヘツド２が
固着される。 Between the bulging portions 8, that is, an intake passage 17, which will be described later.
17 and between the exhaust passages 18, 18, the outer wall of the cylinder block 1 is provided with a bolt insertion hole 12 that vertically passes through the outer wall. Further, a second fixing member, that is, a stud bolt 14 is implanted in the cylinder head 2 superimposed on the cylinder block 1 at a position that coincides with the bolt insertion hole 12. This stud bolt 14
The cylinder head 2 is fixed onto the cylinder block 1 by inserting the bolt insertion hole 12 into the bolt insertion hole 12 and screwing the nut 13 into the lower end thereof and engaging the nut 13 with the tightening seat surface of the cylinder block 1. Ru.
さらにシリンダブロツク１、シリンダヘツド２
およびクランクケース３は、前記小判形もしくは
楕円形のシリンダ孔４の横断面長手方向の両外方
において、４本の通しボルト１５によつて一体に
固着される。 Furthermore, cylinder block 1, cylinder head 2
The crankcase 3 is fixed together with four through bolts 15 on both sides of the oval or elliptical cylinder hole 4 in the longitudinal direction of its cross section.
シリンダヘツド２には、ピストン５の上方にお
いて横断面小判形または楕円形の燃焼室１６が形
成されるとともに、この燃焼室１６の横断面長手
方向中心線の一側及び他側においてそれぞれその
長手方向に並列する吸気通路１７，１７群、及び
排気通路１８，１８群が形成されている。その各
吸気通路１７の下流端及び各排気通路１８の上流
端はそれぞれ二叉に分岐して燃焼室１６に開口し
ており、その各開口部を開閉する吸気弁１９およ
び排気弁２０、並びにそれらの吸、排気弁１９，
２０を作動する動弁機構２１，２２がシリンダヘ
ツド２に設けられる。上記吸、排気通路１７，１
７；１８，１８の直下においてシリンダブロツク
１の、シリンダヘツド２との接合面には、前記水
ジヤケツト７が直接開口されており、その開口部
を通して前記スタツドボルト１０が該水ジヤケツ
ト７内に装入されるようになつている。 In the cylinder head 2, a combustion chamber 16 having an oval or elliptical cross section is formed above the piston 5, and on one side and the other side of the longitudinal center line of the combustion chamber 16, respectively. Intake passages 17, 17 groups and exhaust passages 18, 18 groups are formed in parallel with each other. The downstream end of each intake passage 17 and the upstream end of each exhaust passage 18 are branched into two branches and open into the combustion chamber 16, and an intake valve 19 and an exhaust valve 20 open and close each opening, and intake and exhaust valves 19,
Valve mechanisms 21 and 22 for operating the cylinder head 2 are provided in the cylinder head 2 . The above suction and exhaust passages 17,1
7; The water jacket 7 is directly opened in the joint surface of the cylinder block 1 with the cylinder head 2 directly below 18, 18, and the stud bolt 10 is inserted into the water jacket 7 through the opening. It is becoming more and more popular.
ところで一般にシリンダブロツク１、シリンダ
ヘツド２およびクランクケース３の三者は、それ
らを通しボルト１５によつて一体に締付けるよう
にしているが、その通しボルト１５による締付可
能位置には自から制約があり、特に本考案のよう
に横断面小判形または楕円形のシリンダ孔４を有
し且つそのシリンダ孔４の横断面長手方向に沿つ
て吸、排気通路１７，１７，１８，１８を多数並
列させた機関では、その吸、排気通路１７，１
７，１８，１８との干渉を避けるために前記通し
ボルト１５は、前述のようにシリンダ孔４の横断
面長手方向の両外方に置かざるを得ないが、この
場合、上記通しボルト１５による締付位置がシリ
ンダ孔４中心より大きく離れるため、特にシリン
ダ孔４の横断面長手方向に沿う両側壁近傍の、シ
リンダブロツク１とクランクケース３との接合面
の両圧が不足傾向となる。しかしながら前述のよ
うに、シリンダ孔４の横断面長手方向に沿う両側
壁に近接して水ジヤケツト７の壁面を貫通するス
タツドボルト１０等の第１固着具を以て、シリン
ダ孔４に可及的に近いところでシリンダブロツク
１とクランクケース３とを一体に締着することが
できるので、前記面圧不足は解消される。尚、上
記第１固着具は、水ジヤケツト７内に没している
ので、吸、排気通路１７，１７；１８，１８直下
に位置するもそれら通路と干渉するおそれはな
い。 By the way, the cylinder block 1, cylinder head 2, and crankcase 3 are generally tightened together with a through bolt 15, but there are restrictions on the positions where the through bolt 15 can be tightened. In particular, as in the present invention, the cylinder hole 4 has an oval or elliptical cross section, and a large number of intake and exhaust passages 17, 17, 18, 18 are arranged in parallel along the longitudinal direction of the cross section of the cylinder hole 4. In the engine, the intake and exhaust passages 17, 1
In order to avoid interference with the through bolts 7, 18, and 18, the through bolts 15 must be placed on both sides of the longitudinal direction of the cross section of the cylinder hole 4 as described above. Since the tightening position is far away from the center of the cylinder hole 4, the pressure at the joint surfaces between the cylinder block 1 and the crankcase 3 tends to be insufficient, especially near both side walls along the longitudinal direction of the cross section of the cylinder hole 4. However, as described above, the first fixing device, such as the stud bolt 10, which penetrates the wall surface of the water jacket 7 in proximity to both side walls along the longitudinal direction of the cross section of the cylinder hole 4, is installed as close as possible to the cylinder hole 4. By the way, since the cylinder block 1 and the crankcase 3 can be fastened together, the lack of surface pressure mentioned above can be solved. It should be noted that since the first fixing member is submerged in the water jacket 7, there is no risk of interference with the suction and exhaust passages 17, 17; 18, 18, even though they are located directly below them.
以上のように本考案によれば、シリンダヘツド
２及びクランクケース３が上部及び下部にそれぞ
れ接合されるシリンダブロツク１に横断面小判形
または楕円形のシリンダ孔４を、また前記シリン
ダヘツド２に同じく横断面小判形または楕円形の
燃焼室１６をそれぞれ形成し、前記シリンダ孔４
周囲のシリンダブロツク１に水ジヤケツト７を形
成した水冷式内燃機関において、シリンダヘツド
２には、前記燃焼室１６の横断面長手方向中心線
の一側及び他側においてそれぞれその長手方向に
並列して該燃焼室１６に開口する吸気通路１７，
１７群及び排気通路１８，１８群を形成したの
で、吸、排気通路１７，１７；１８，１８の燃焼
室開口部すなわち吸、排気弁口の総開口面積を、
シリンダ孔４の横断面積に対して相対的に広く確
保することができ、機関の吸、排気効率を高めて
その出力向上を図る上で有利である。 As described above, according to the present invention, the cylinder block 1 to which the cylinder head 2 and the crankcase 3 are joined to the upper and lower parts, respectively, is provided with the cylinder hole 4 having an oval or oval cross section, and the cylinder head 2 is also provided with the cylinder hole 4 having an oval or oval cross section. Combustion chambers 16 each having an oval or elliptical cross section are formed, and the cylinder holes 4
In a water-cooled internal combustion engine in which a water jacket 7 is formed in the surrounding cylinder block 1, the cylinder head 2 has a plurality of water jackets arranged in parallel in the longitudinal direction on one side and the other side of the longitudinal center line of the cross section of the combustion chamber 16, respectively. an intake passage 17 opening into the combustion chamber 16;
Since the 17th group and the exhaust passages 18, 18 groups are formed, the total opening area of the combustion chamber openings of the intake and exhaust passages 17, 17; 18, 18, that is, the intake and exhaust valve ports, is
It is possible to ensure a relatively large cross-sectional area of the cylinder hole 4, which is advantageous in increasing the intake and exhaust efficiency of the engine and improving its output.
またかかる吸、排気通路１７，１７；１８，１
８の配置にも拘らず、シリンダヘツド２、シリン
ダブロツク１及びクランクケース３の三者を一体
に固着する複数本の通しボルト１５…はシリンダ
孔４の横断面長手方向両外方位置、すなわちその
長手方向両側壁より離れた位置に配設されるの
で、それら通しボルト１５…と吸、排気通路１
７，１７；１８，１８との干渉を無理なく回避で
き、吸、排気通路１７，１７；１８，１８の形状
や位置が該通しボルト１５…のために制限を受け
るうなことはない。 In addition, such suction and exhaust passages 17, 17; 18, 1
8, the plurality of through bolts 15 for fixing the cylinder head 2, cylinder block 1, and crankcase 3 together are located at both outer positions in the longitudinal direction of the cross section of the cylinder hole 4, that is, Since it is arranged at a position away from both walls in the longitudinal direction, these through bolts 15... and the intake and exhaust passages 1
7, 17; 18, 18 can be easily avoided, and the shapes and positions of the intake and exhaust passages 17, 17; 18, 18 are not restricted by the through bolts 15.
さらに吸、排気通路１７，１７；１８，１８の
下方においてシリンダブロツク１の、シリンダヘ
ツド２との接合面には前記水ジヤケツト７を直接
開口し、その水ジヤケツト７の底壁を前記シリン
ダ孔４の横断面長手方向に沿う両側壁の近傍で貫
通する複数本のボルト１０等の第１固着具を以て
シリンダブロツク１とクランクケース３とを一体
に締付固定したので、その第１固着具１０は、前
記吸、排気通路１７，１７；１８，１８と何ら干
渉することなく、シリンダ孔４の横断面長手方向
に沿う両側壁に可及的に近い位置でシリンダブロ
ツク１とクランクケース３とを強固に締付けるこ
とができ、従つて、前述の如く通しボルト１５…
がシリンダ孔４の横断面長手方向に沿う両側壁よ
り離れることに起因してその両側壁近傍の、シリ
ンダブロツク１とクランクケース３との接合面の
面圧が不足傾向となつても、その不足分を上記第
１固着具１０の締付力によつて十分に補うことが
でき、これによつて、その面圧不足によるオイル
或いは水洩れを末然に防止することができる。し
かもシリンダ孔４の横断面長手方向に沿う、シリ
ンダブロツク１とクランクケース３との締付け合
せ面を該長手方向と直角方向に薄くして、機関本
体をその直角方向に小型化でき、機関本体の軽量
コンパクト化に寄与し得る。しかもまた吸、排気
通路１７，１７；１８，１８下方のシリンダヘツ
ド２下面に前記水ジヤケツト７の開放上面を直接
臨ませることができるから、その水ジヤケツト７
内の水によつて、吸気通路１７，１７内の吸入混
合気を効果的に加熱してその燃焼を安定させるこ
とができると共に、排ガスによつて高温となる、
シリンダヘツド２の排気通路１８，１８周辺部を
効果的に冷却してその局部的な過熱を未然に防止
し得る。 Further, the water jacket 7 is directly opened at the joint surface of the cylinder block 1 with the cylinder head 2 below the intake and exhaust passages 17, 17; 18, 18, and the bottom wall of the water jacket 7 is connected to the cylinder hole 4. Since the cylinder block 1 and the crankcase 3 are tightened and fixed together using a first fixing device such as a plurality of bolts 10 passing through near both side walls along the longitudinal direction of the cross section, the first fixing device 10 is , the cylinder block 1 and the crankcase 3 are firmly fixed at a position as close as possible to both side walls along the longitudinal direction of the cross section of the cylinder hole 4 without interfering with the intake and exhaust passages 17, 17; 18, 18. Therefore, as mentioned above, the through bolts 15...
Even if the contact pressure of the joint surface between the cylinder block 1 and the crankcase 3 near the both side walls tends to be insufficient due to the fact that the cylinder hole 4 is separated from both side walls along the longitudinal direction of the cross section, there is a tendency that the surface pressure is insufficient. This can be sufficiently compensated for by the tightening force of the first fixing member 10, thereby ultimately preventing oil or water leakage due to insufficient surface pressure. Moreover, by making the tightening surface between the cylinder block 1 and the crankcase 3 along the longitudinal direction of the cross section of the cylinder hole 4 thinner in the direction perpendicular to the longitudinal direction, the engine body can be made smaller in the direction perpendicular to the longitudinal direction. It can contribute to making it lighter and more compact. Moreover, since the open upper surface of the water jacket 7 can be directly exposed to the lower surface of the cylinder head 2 below the intake and exhaust passages 17, 17; 18, 18, the water jacket 7
The water inside can effectively heat the intake air-fuel mixture in the intake passages 17, 17 to stabilize its combustion, and the exhaust gas can raise the temperature.
The area around the exhaust passages 18, 18 of the cylinder head 2 can be effectively cooled to prevent local overheating.
尚、前記実施例のように吸気通路１７，１７の
相互間及び排気通路１８，１８の相互間に配設さ
れる他のボルト１４等の第２固着具によりシリン
ダブロツク１とシリンダヘツド２とを一体に締付
固定し、前記第２固着具に対する締付座面をシリ
ンダブロツク１に設けるようにすれば、該第２固
着具によつてシリンダヘツド２とシリンダブロツ
ク１間の結合強度を高めることができ、しかも該
第２固着具とシリンダヘツド側の吸、排気通路１
７，１７；１８，１８との干渉を容易に回避でき
る等の効果が得られる。 Incidentally, as in the embodiment described above, the cylinder block 1 and the cylinder head 2 are connected to each other by a second fastener such as another bolt 14 disposed between the intake passages 17, 17 and between the exhaust passages 18, 18. By tightening and fixing them together and providing a tightening seat surface for the second fixing device on the cylinder block 1, the bonding strength between the cylinder head 2 and the cylinder block 1 can be increased by the second fixing device. and the second fixing tool and the intake and exhaust passages 1 on the cylinder head side.
7, 17; 18, 18 can be easily avoided.
第１図は第２図−線に沿う、本考案装置を
装備した内燃機関本体の縦断側面図、第２図は第
１図−線横断面図、第３図は第１図−線
横断面図である。
１……シリンダブロツク、２……シリンダヘツ
ド、３……クランクケース、４……シリンダ孔、
７……水ジヤケツト、１０……第１固着具として
のスタツドボルト、１４……第２固着具としての
ボルト、１５……通しボルト、１６……燃焼室、
１７……吸気通路、１８……排気通路。
Figure 1 is a longitudinal sectional side view of the internal combustion engine body equipped with the device of the present invention taken along the line in Figure 2, Figure 2 is a cross-sectional view along the line in Figure 1, and Figure 3 is a cross-sectional view along the line in Figure 1. It is a diagram. 1... Cylinder block, 2... Cylinder head, 3... Crank case, 4... Cylinder hole,
7... Water jacket, 10... Stud bolt as a first fixing device, 14... Bolt as a second fixing device, 15... Through bolt, 16... Combustion chamber,
17...Intake passage, 18...Exhaust passage.
Claims (1)
部及び下部にそれぞれ接合されるシリンダブロ
ツク１に横断面小判形または楕円形のシリンダ
孔４を、また前記シリンダヘツド２に同じく横
断面小判形または楕円形の燃焼室１６をそれぞ
れ形成し、前記シリンダ孔４周囲のシリンダブ
ロツク１に水ジヤケツト７を形成した水冷式内
燃機関において、シリンダヘツド２には、前記
燃焼室１６の横断面長手方向中心線の一側及び
他側においてそれぞれその長手方向に並列して
該燃焼室１６に開口する吸気通路１７，１７群
及び排気通路１８，１８群を形成し、前記吸，
排気通路１７，１７；１８，１８の下方におい
てシリンダブロツク１の、シリンダヘツド２と
の接合面には前記水ジヤケツト７を直接開口
し、その水ジヤケツト７の底壁を前記シリンダ
孔４の横断面長手方向に沿う両側壁の近傍で貫
通する複数本のボルト１０等の第１固着具を以
てシリンダブロツク１とクランクケース３とを
一体に締付固定し、前記シリンダヘツド２、シ
リンダブロツク１及びクランクケース３の三者
を、前記シリンダ孔４の横断面長手方向両外方
において複数本の通しボルト１５…によつて一
体に固着してなる、水冷式内燃機関における機
関本体の締付固定装置。 前記実用新案登録請求の範囲第項記載の水
冷式内燃機関における機関本体の締付固定装置
において、前記吸気通路１７，１７の相互間及
び排気通路１８，１８の相互間に配設される他
のボルト１４等の第２固着具によりシリンダブ
ロツク１とシリンダヘツド２とを一体に締付固
定し、前記第２固着具に対する締付座面をシリ
ンダブロツク１に設けてなる、水冷式内燃機関
における機関本体の締付固定装置。[Claims for Utility Model Registration] A cylinder hole 4 having an oval or oval cross section is provided in the cylinder block 1 to which the cylinder head 2 and the crankcase 3 are joined to the upper and lower parts, respectively. In a water-cooled internal combustion engine in which an oval or elliptical combustion chamber 16 is formed and a water jacket 7 is formed in the cylinder block 1 around the cylinder hole 4, the cylinder head 2 has a longitudinal cross section of the combustion chamber 16. Intake passages 17, 17 groups and exhaust passages 18, 18 groups are formed in parallel in the longitudinal direction on one side and the other side of the directional center line, respectively, and open into the combustion chamber 16, and the intake passages,
The water jacket 7 is opened directly at the joint surface of the cylinder block 1 with the cylinder head 2 below the exhaust passages 17, 17; 18, 18, and the bottom wall of the water jacket 7 is connected to the cross section of the cylinder hole 4. The cylinder block 1 and the crankcase 3 are tightened and fixed together using first fixing devices such as a plurality of bolts 10 passing through the vicinity of both walls along the longitudinal direction, and the cylinder head 2, the cylinder block 1, and the crankcase are secured together. A tightening and fixing device for an engine body in a water-cooled internal combustion engine, in which the three parts of No. 3 are fixed together by a plurality of through bolts 15 on both outer sides of the cylinder hole 4 in the longitudinal direction of the cross section. In the tightening and fixing device for an engine body in a water-cooled internal combustion engine as set forth in claim 1 of the utility model registration claim, the other A water-cooled internal combustion engine in which a cylinder block 1 and a cylinder head 2 are integrally tightened and fixed by a second fastener such as a bolt 14, and the cylinder block 1 is provided with a fastening seat surface for the second fastener. Body tightening and fixing device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11511279U JPS6224777Y2 (en) | 1979-08-21 | 1979-08-21 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11511279U JPS6224777Y2 (en) | 1979-08-21 | 1979-08-21 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5631635U JPS5631635U (en) | 1981-03-27 |
| JPS6224777Y2 true JPS6224777Y2 (en) | 1987-06-24 |
Family
ID=29347352
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11511279U Expired JPS6224777Y2 (en) | 1979-08-21 | 1979-08-21 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6224777Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9099097B2 (en) | 1999-06-25 | 2015-08-04 | Adrea, LLC | Electronic book with voice emulation features |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59131752A (en) * | 1983-01-19 | 1984-07-28 | Honda Motor Co Ltd | Internal-combustion engine |
| JPS62159752U (en) * | 1986-04-02 | 1987-10-09 | ||
| JPS6435939U (en) * | 1987-08-31 | 1989-03-03 | ||
| JPH0523074Y2 (en) * | 1988-12-23 | 1993-06-14 |
-
1979
- 1979-08-21 JP JP11511279U patent/JPS6224777Y2/ja not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9099097B2 (en) | 1999-06-25 | 2015-08-04 | Adrea, LLC | Electronic book with voice emulation features |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5631635U (en) | 1981-03-27 |
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