JP2506676Y2 - 2-cycle diesel engine - Google Patents
2-cycle diesel engineInfo
- Publication number
- JP2506676Y2 JP2506676Y2 JP1990023787U JP2378790U JP2506676Y2 JP 2506676 Y2 JP2506676 Y2 JP 2506676Y2 JP 1990023787 U JP1990023787 U JP 1990023787U JP 2378790 U JP2378790 U JP 2378790U JP 2506676 Y2 JP2506676 Y2 JP 2506676Y2
- Authority
- JP
- Japan
- Prior art keywords
- air supply
- piston
- valve
- supply valve
- exhaust valve
- 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 - Lifetime
Links
Landscapes
- Combustion Methods Of Internal-Combustion Engines (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案は２サイクルディーゼル機関に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a two-stroke diesel engine.
シリンダヘッドに給気弁および排気弁を設けた副室付
２サイクルディーゼル機関において、排気弁側の給気弁
開口を覆うマスタ壁を排気弁と給気弁を含む垂直平面内
に配置してこの垂直平面内において新気をループ状に流
通せしめ、この垂直平面から離れたシリンダヘッド内壁
面周辺部に副室の噴口を配置するようにした２サイクル
ディーゼル機関が本出願人により既に提案されている
（実願平１−9445号参照）。In a two-cycle diesel engine with a sub chamber in which a cylinder head is provided with an intake valve and an exhaust valve, a master wall that covers the intake valve opening on the exhaust valve side is arranged in a vertical plane including the exhaust valve and the intake valve. The applicant has already proposed a two-cycle diesel engine in which fresh air is circulated in a loop in a vertical plane, and the injection port of the auxiliary chamber is arranged in the peripheral portion of the inner wall surface of the cylinder head away from the vertical plane. (See Jitsuhei Hei 1-9445).
しかしながらこのように排気弁側の給気弁開口を覆う
マスク壁を給気弁と排気弁を含む垂直平面内に配置する
と新気が主にこの垂直平面内をループ状をなして流れる
ためにこの垂直平面内から離れた領域は多量の既燃ガス
が残留したままとなっている。従って副室の噴口をこの
垂直平面から離れたシリンダヘッド内壁面周辺部に配置
すると圧縮行程時に多量の既燃ガスが噴口を介して副室
内に送り込まれることとなり、斯くして副室内の新気が
不十分となるために副室内において良好な着火燃焼を確
保できないという問題を生ずる。However, when the mask wall that covers the intake valve opening on the exhaust valve side is arranged in the vertical plane including the intake valve and the exhaust valve in this manner, the fresh air mainly flows in a loop in the vertical plane. A large amount of burnt gas remains in the region away from the vertical plane. Therefore, if the injection port of the sub chamber is arranged near the inner wall surface of the cylinder head away from the vertical plane, a large amount of burned gas is sent into the sub chamber through the injection port during the compression stroke, and thus the fresh air in the sub chamber is discharged. Therefore, there is a problem that good ignition and combustion cannot be secured in the sub-chamber.
上記問題点を解決するため本考案によれば、シリンダ
ヘッドに給気弁および排気弁を設けた副室付２サイクル
ディーゼル機関において、シリンダヘッド内壁面上に形
成された凹部内に給気弁を陥没して配設せしめると共に
排気弁側の給気弁周辺部に排気弁側の給気弁開口からの
新気の流入を抑制する新規流入抑制壁を設け、凹部内に
侵入可能な凸部をピストン頂面上に形成すると共に凹部
と副室の噴口とを接続する案内溝をピストン頂面上に形
成している。In order to solve the above problems, according to the present invention, in a two-cycle diesel engine with a sub chamber in which a cylinder head is provided with an intake valve and an exhaust valve, the intake valve is provided in a recess formed on the inner wall surface of the cylinder head. A new inflow suppression wall that suppresses the inflow of fresh air from the air intake valve opening on the exhaust valve side is provided around the air intake valve on the exhaust valve side, and a convex part that can enter the recess is provided. A guide groove is formed on the top surface of the piston and at the same time, a guide groove is formed on the top surface of the piston to connect the recess and the injection port of the sub chamber.
給気弁開口から流入した新気の一部は案内通路を介し
て噴口に導かれる。ピストンが上死点近傍になると、シ
リンダヘッド内壁面上に形成された凹部内に、ピストン
頂面に形成された凸部が挿入され、これによって凹部内
の新気が案内通路を介して噴口に向かって押し出され
る。従って噴口近傍には新気が多量に存在し、圧縮行程
時に新気が噴口を介して副室内に送り込まれる。A part of the fresh air that has flowed in from the opening of the air supply valve is guided to the nozzle through the guide passage. When the piston is near the top dead center, the convex part formed on the top surface of the piston is inserted into the concave part formed on the inner wall surface of the cylinder head, whereby the fresh air in the concave part is guided to the injection port through the guide passage. It is pushed out. Therefore, a large amount of fresh air is present in the vicinity of the injection port, and the fresh air is sent into the sub chamber through the injection port during the compression stroke.
第１図から第４図には第１の実施例を示す。第３図お
よび第４図を参照すると、１はシリンダブロック、２は
シリンダブロック１内で往復動するピストン、３はシリ
ンダヘッド、４はピストン２の平坦な頂面とシリンダヘ
ッド３の平坦な内壁面3a間に形成された燃焼室、５は給
気弁、６は給気ポート、７は排気弁、８は排気ポート、
９は副室、10はシリンダヘッド３の内壁面3aと同一平面
内に配置された副室９の噴口、11は副室９内に燃料を噴
射するための燃料噴射弁を夫々示す。A first embodiment is shown in FIGS. Referring to FIGS. 3 and 4, 1 is a cylinder block, 2 is a reciprocating piston in the cylinder block 1, 3 is a cylinder head, 4 is a flat top surface of the piston 2 and a flat inner surface of the cylinder head 3. A combustion chamber formed between the wall surfaces 3a, 5 is an intake valve, 6 is an intake port, 7 is an exhaust valve, 8 is an exhaust port,
Reference numeral 9 denotes a sub chamber, 10 denotes an injection port of the sub chamber 9 arranged in the same plane as the inner wall surface 3a of the cylinder head 3, and 11 denotes a fuel injection valve for injecting fuel into the sub chamber 9.
第３図に示すようにシリンダヘッド３の内壁面3a上に
は給気弁凹部12が形成され、この給気弁凹部12の奥部に
給気弁５に対する弁座13が配置される。従って給気弁５
は給気弁凹部12内に引込むことになる。排気弁７側の給
気弁凹部12の周壁は給気弁５のかさ部外周線に近接配置
された円筒状に形成され、従ってこの円筒状周壁は排気
弁７側の給気弁５の開口を覆うマスク壁14を形成する。
一方、マスク壁14と反対側の給気弁凹部12の周壁部分15
は燃焼室４内に向けて拡開する円錐状に形成される。第
４図に示されるようにマスク壁14は給気弁５と排気弁７
を含む垂直平面Ａ−Ａに対し対称に形成されている。こ
のマスタ壁14は給気弁５のかさ部外周線に沿ってそのほ
ぼ1/4周に亘って延びており、残りのほぼ3/4周は円錐状
周壁部分15となっている。As shown in FIG. 3, an air supply valve recess 12 is formed on the inner wall surface 3a of the cylinder head 3, and a valve seat 13 for the air supply valve 5 is arranged in the back of the air supply valve recess 12. Therefore, the air supply valve 5
Will be drawn into the air supply valve recess 12. The peripheral wall of the intake valve recess 12 on the side of the exhaust valve 7 is formed in a cylindrical shape that is arranged close to the outer circumference of the bulk part of the intake valve 5, so that this cylindrical peripheral wall is the opening of the intake valve 5 on the side of the exhaust valve 7. A mask wall 14 is formed to cover the.
On the other hand, the peripheral wall portion 15 of the air supply valve recess 12 on the side opposite to the mask wall 14
Are formed in a conical shape that expands toward the inside of the combustion chamber 4. As shown in FIG. 4, the mask wall 14 has an intake valve 5 and an exhaust valve 7.
It is formed symmetrically with respect to a vertical plane A-A including. The master wall 14 extends along the outer circumference of the bulge portion of the air supply valve 5 for approximately 1/4 of the circumference, and the remaining approximately 3/4 circumference is a conical peripheral wall portion 15.
また、シリンダヘッド３の内壁面3a上には給気弁凹部
12より浅い排気弁凹部16が形成され、この排気弁凹部16
内に排気弁７が配設される。従って排気弁７閉弁時には
排気弁７は排気弁凹部16内に引込むことになる。排気弁
凹部16の周壁部分17は燃焼室４内に向けて拡開する円錐
状に形成され、排気弁７の全周に亘って延びている。Further, on the inner wall surface 3a of the cylinder head 3, the air supply valve recess is formed.
An exhaust valve recess 16 that is shallower than 12 is formed.
An exhaust valve 7 is arranged inside. Therefore, when the exhaust valve 7 is closed, the exhaust valve 7 is pulled into the exhaust valve recess 16. A peripheral wall portion 17 of the exhaust valve recess 16 is formed in a conical shape that widens toward the inside of the combustion chamber 4, and extends over the entire circumference of the exhaust valve 7.
第１図および第２図を参照すると、ピストン２の頂面
2a上には給気弁凹部12に対応して凸部20が形成される。
凸部20は給気弁凹部12とほぼ相似な形状に形成され、ピ
ストン２が上死点位置のとき凸部20は給気弁凹部12内に
挿入せしめられる。また、ピストン２の頂面2a上には、
噴口10に対応する位置から、給気弁凹部12および排気弁
凹部16に対応する位置まで延びる案内溝22が形成され
る。案内溝22は双葉状に形成され、２つの円筒状溝22a
及び22bと帯状溝22cとを具備する。一方の円筒状溝22a
の端部22dはピストン凸部20上に形成される。円筒状溝2
2aの端部22dは、ピストン頂面2aからピストン凸部20の
頂面20aまで滑らかな凹状曲面によって形成され、従っ
てこの端部22dを凹状曲面部と称する。他方の円筒状溝2
2bはその端部が排気弁凹部16に対応する位置となるよう
形成され、帯状溝22cは噴口10対応位置まで延びる。Referring to FIGS. 1 and 2, the top surface of the piston 2
A convex portion 20 is formed on the 2a so as to correspond to the air supply valve concave portion 12.
The convex portion 20 is formed in a shape substantially similar to the intake valve concave portion 12, and the convex portion 20 is inserted into the intake valve concave portion 12 when the piston 2 is at the top dead center position. Also, on the top surface 2a of the piston 2,
A guide groove 22 extending from a position corresponding to the injection port 10 to a position corresponding to the intake valve recess 12 and the exhaust valve recess 16 is formed. The guide groove 22 is formed in a double leaf shape, and has two cylindrical grooves 22a.
And 22b and a band-shaped groove 22c. One cylindrical groove 22a
The end 22d of the is formed on the piston protrusion 20. Cylindrical groove 2
The end portion 22d of 2a is formed by a smooth concave curved surface from the piston top surface 2a to the top surface 20a of the piston convex portion 20, and thus this end portion 22d is referred to as a concave curved surface portion. The other cylindrical groove 2
2b is formed such that its end is located at a position corresponding to the exhaust valve recess 16, and the band-shaped groove 22c extends to a position corresponding to the injection port 10.
給気弁５が開弁すると大部分の新気は第３図において
矢印Ｓで示すようにマスク壁14と反対側の円錐状内周壁
15に沿って燃焼室４内に流入することになる。従ってマ
スク壁14は排気弁７側の給気弁５開口からの新気の流入
を抑制する新気流入抑制壁を形成していることがわか
る。次いで新気はシリンダ内壁面に沿って下降し、次い
でピストン２の頂面に沿ってピストン２の頂面を横切
り、次いで再びシリンダ内壁面に沿って上昇するために
燃焼室４内には強力なループ掃気流Ｓが発生せしめられ
る。燃焼室４内の既念ガスはこのループ掃気流Ｓによっ
て順次排気弁７を介して排気ポート８内に押し出され
る。給気弁５の開口から流入する新気の一部は案内溝22
によって噴口10に導かれ、従って圧縮行程が開始される
ころには噴口10下方の燃焼室４の周辺領域には多量の新
気が存在することになる。また、ピストン２が上死点近
傍位置にあるとき（第１図参照）、新気を多量に含む給
気弁凹部12内のガスが凸部20によって押し出され案内溝
22を介して噴口10に導かれる。従って、噴口10付近には
多量の新気が存在することになる。このため、圧縮行程
時には多量の新気が噴口10を介して副室９内に押し込ま
れることになり、斯くして副室９内に噴射された燃料が
良好に着火燃焼せしめられることになる。When the air supply valve 5 opens, most of the fresh air is a conical inner peripheral wall opposite to the mask wall 14 as shown by an arrow S in FIG.
It will flow into the combustion chamber 4 along 15. Therefore, it can be seen that the mask wall 14 forms a fresh air inflow suppressing wall that suppresses inflow of fresh air from the opening of the air supply valve 5 on the exhaust valve 7 side. Then, the fresh air descends along the inner wall surface of the cylinder, then crosses the top surface of the piston 2 along the top surface of the piston 2, and then rises again along the inner wall surface of the cylinder. A loop scavenging air S is generated. The scavenging gas in the combustion chamber 4 is sequentially pushed out by the loop scavenging air S into the exhaust port 8 via the exhaust valve 7. A part of the fresh air flowing in from the opening of the air supply valve 5 is a guide groove 22.
Therefore, a large amount of fresh air is present in the peripheral region of the combustion chamber 4 below the nozzle 10 by the time when it is guided to the nozzle 10 and thus the compression stroke is started. Further, when the piston 2 is in the position near the top dead center (see FIG. 1), the gas in the air supply valve recess 12 containing a large amount of fresh air is pushed out by the projection 20 and is guided into the guide groove.
It is guided to the nozzle 10 via 22. Therefore, a large amount of fresh air exists near the nozzle 10. Therefore, a large amount of fresh air is pushed into the sub chamber 9 through the injection port 10 during the compression stroke, and thus the fuel injected into the sub chamber 9 is satisfactorily ignited and burned.
また、比較的大きな容積を有する給気弁凹部12内に凸
部20が挿入されるため、機関の圧縮比を向上せしめるこ
とができる。Further, since the projection 20 is inserted into the air supply valve recess 12 having a relatively large volume, the compression ratio of the engine can be improved.
また、燃焼行程時に噴口10を介して副室９から噴出し
てくる未燃燃料を含んだ噴流を案内溝22を介して給気弁
凹部12内および排気弁凹部16内に均等に導き、未燃燃料
を給気弁および排気弁凹部12,16内で燃焼せしめる。給
気弁凹部12内に導かれる噴流は凹状曲面部22dによって
スムースに給気弁凹部12内に導入される。従って給気弁
および排気弁凹部12,16内の空気も有効に利用すること
ができ、空気利用率を高めることができる。Further, during the combustion stroke, the jet flow containing unburned fuel ejected from the sub chamber 9 through the injection port 10 is evenly guided into the intake valve recess 12 and the exhaust valve recess 16 through the guide groove 22, Combustion fuel is burned in the intake valve and exhaust valve recesses 12, 16. The jet flow guided into the air supply valve recess 12 is smoothly introduced into the air supply valve recess 12 by the concave curved surface portion 22d. Therefore, the air in the air supply valve and the exhaust valve recesses 12, 16 can also be effectively used, and the air utilization rate can be increased.
第５図および第６図には案内溝22の形状の異なる他の
実施例を示す。5 and 6 show another embodiment in which the shape of the guide groove 22 is different.
第５図に示す第２の実施例では、第２図に示す第１の
実施例の円筒状溝22a,22bを夫々帯状溝22e,22fとしてい
る。帯状溝22eの端部22gは、第２図に示す第１の実施例
と同様滑らかな凹状曲面に形成される。この実施例によ
れば、第１の実施例に比べ案内溝22の容積を減少するこ
とができ、このため機関の圧縮比をさらに向上すること
ができる。In the second embodiment shown in FIG. 5, the cylindrical grooves 22a, 22b of the first embodiment shown in FIG. 2 are band-shaped grooves 22e, 22f, respectively. The end portion 22g of the band-shaped groove 22e is formed into a smooth concave curved surface as in the first embodiment shown in FIG. According to this embodiment, the volume of the guide groove 22 can be reduced as compared with the first embodiment, so that the compression ratio of the engine can be further improved.
第６図に示す第３の実施例では、第５図に示す第２の
実施例の帯状溝22e,22fが夫々給気弁および排気弁凹部1
2および16に内接するように円弧状に形成されている。
このため、燃焼行程時において噴口10を介して副室９か
ら噴出される未燃燃料を含む噴流が給気弁および排気弁
凹部12,16内に旋回流を形成し、さらに空気利用率を高
めることができる。In the third embodiment shown in FIG. 6, the belt-shaped grooves 22e and 22f of the second embodiment shown in FIG.
It is formed in an arc shape so as to be inscribed in 2 and 16.
Therefore, during the combustion stroke, the jet flow containing unburned fuel ejected from the auxiliary chamber 9 through the injection port 10 forms a swirl flow in the intake valve and exhaust valve recesses 12 and 16, further increasing the air utilization rate. be able to.
第７図および第８図には第４の実施例を示す。この実
施例は第１の実施例とほぼ同様であるので実１の実施例
と異なる点について説明する。A fourth embodiment is shown in FIGS. 7 and 8. Since this embodiment is almost the same as the first embodiment, only the points different from the first embodiment will be described.
第７図および第８図を参照すると、噴口10は排気弁凹
部16側にずれて配置され、双葉状の案内溝22は、第７図
において給気弁凹部12に対応する円筒状溝22aが排気弁
凹部16に対応する円筒状溝22bより下方に位置するよう
に傾斜して配置される。従って、排気弁凹部16と円筒状
溝22bの重合面積の方が給気弁凹部12と円筒状凹部22aの
重合面積より大きくなる。円筒状溝22aの端部22hはピス
トン凸部20上に形成される。端部22hは、ピストン頂面2
aからピストン凸部20の頂面20aまで、第８図に示される
ように断面直線状の曲面によって形成され、従ってこの
端部22hを凹状曲面部と称する。この凹状曲面部22hの中
央部断面は第８図に示されるように給気弁凹部12の内周
面12aと平行になるように形成されており、従って給気
弁凹部内周面12aと凹状湾曲部22hとの間に十分な幅を有
する通路を確保することができる。このため、主燃焼室
の容積を増大することなく、すなわち、圧縮比を低下さ
せることなくガスの流れを円滑化することができる。Referring to FIG. 7 and FIG. 8, the injection port 10 is displaced to the exhaust valve recess 16 side, and the bilobal guide groove 22 has a cylindrical groove 22a corresponding to the intake valve recess 12 in FIG. It is arranged so as to be inclined so as to be located below the cylindrical groove 22b corresponding to the exhaust valve recessed portion 16. Therefore, the overlapping area of the exhaust valve recess 16 and the cylindrical groove 22b is larger than the overlapping area of the intake valve recess 12 and the cylindrical recess 22a. The end 22h of the cylindrical groove 22a is formed on the piston protrusion 20. The end 22h is the piston top surface 2
From a to the top surface 20a of the piston convex portion 20, it is formed by a curved surface having a linear cross section as shown in FIG. 8. Therefore, this end portion 22h is referred to as a concave curved surface portion. The cross section of the central portion of the concave curved surface portion 22h is formed so as to be parallel to the inner peripheral surface 12a of the air supply valve recess 12 as shown in FIG. A passage having a sufficient width can be secured between the curved portion 22h. Therefore, the gas flow can be made smooth without increasing the volume of the main combustion chamber, that is, without reducing the compression ratio.
第９図および第10図には第５の実施例を示す。この
実施例は第４の実施例とほぼ同様であるため第４の実施
例と異なる点について説明する。A fifth embodiment is shown in FIGS. 9 and 10. Since this embodiment is almost the same as the fourth embodiment, only the points different from the fourth embodiment will be described.
第９図および第10図を参照すると、双葉状案内溝22の
円筒状溝22a及び22bと帯状溝22cは同一平面内に位置し
ている。円筒状溝22a側のピストン凸部20上に形成され
た凹状曲面部30はピストン凸部頂面20aから円筒状溝22a
の周縁部まで延びている。凹状曲面部30の中央部断面は
第10図に示されるように給気弁凹部12の内周面12aと平
行な直線状に形成されている。第９図に示されるよう
に、凹状曲面部30の上端周縁と下端周縁は中心が同一の
円弧によって形成されている。従って、本実施例によれ
ば凹状曲面部30と給気弁凹部内周面12aとの間に十分な
幅を有する通路を形成することができ、ガスの流れをよ
り円滑化することができる。Referring to FIG. 9 and FIG. 10, the cylindrical grooves 22a and 22b of the bilobal guide groove 22 and the strip groove 22c are located in the same plane. The concave curved surface portion 30 formed on the piston convex portion 20 on the side of the cylindrical groove 22a has a cylindrical groove 22a from the piston convex portion top surface 20a.
Extends to the peripheral edge of. The cross section of the central portion of the concave curved surface portion 30 is formed in a straight line parallel to the inner peripheral surface 12a of the air supply valve concave portion 12 as shown in FIG. As shown in FIG. 9, the upper edge and the lower edge of the concave curved surface portion 30 are formed by arcs having the same center. Therefore, according to the present embodiment, a passage having a sufficient width can be formed between the concave curved surface portion 30 and the air supply valve concave portion inner peripheral surface 12a, and the gas flow can be made smoother.
ループ掃気によって燃焼室内の既燃ガスを十分に掃気
しつつ副室内に十分な量の新気を押し込むことができ、
斯くして副室内における良好な着火燃焼を確保すること
ができる。また、上死点近傍において、シリンダ内壁面
上に形成された凹部内に、ピストン頂面に形成された凸
部が挿入されるので圧縮比を高めることができる。By loop scavenging, it is possible to scaveng the burnt gas in the combustion chamber sufficiently and push a sufficient amount of fresh air into the sub chamber,
Thus, good ignition and combustion in the sub chamber can be secured. Further, since the convex portion formed on the piston top surface is inserted into the concave portion formed on the cylinder inner wall surface in the vicinity of the top dead center, the compression ratio can be increased.
第１図は第４図のＩ−Ｉ線に沿ってみた第１の実施例の
２サイクルディーゼル機関の側面断面図、第２図は第１
図のピストンの頂面図、第３図は第４図のIII−III線に
沿ってみた２サイクルディーゼル機関の側面断面図、第
４図は第３図のシリンダヘッドの底面図、第５図は第２
の実施例を示すピストンの頂面図、第６図は第３の実施
例を示すピストンの頂面図、第７図は第４の実施例を示
すピストンの頂面図、第８図は第７図のVIII−VIII線に
沿ってみた２サイクルディーゼル機関の側面断面図、第
９図は第５の実施例を示すピストンの頂面図、第10図は
第９図のＸ−Ｘ線に沿ってみた２サイクルディーゼル機
関の側面断面図である。 ２……ピストン、３……シリンダヘッド、3a……シリン
ダヘッド内壁面、５……給気弁、７……排気弁、９……
副室、10……噴口、12……凹部、14……マスク壁、20…
…凸部、22……案内溝。1 is a side sectional view of the two-stroke diesel engine of the first embodiment taken along the line I-I of FIG. 4, and FIG.
FIG. 3 is a top view of the piston shown in FIG. 3, FIG. 3 is a side sectional view of the two-cycle diesel engine taken along the line III-III in FIG. 4, and FIG. 4 is a bottom view of the cylinder head shown in FIG. Is the second
FIG. 6 is a top view of the piston showing the third embodiment, FIG. 6 is a top view of the piston showing the third embodiment, FIG. 7 is a top view of the piston showing the fourth embodiment, and FIG. FIG. 7 is a side sectional view of a two-cycle diesel engine taken along line VIII-VIII in FIG. 9, FIG. 9 is a top view of a piston showing a fifth embodiment, and FIG. 10 is line XX in FIG. It is a side sectional view of a two-cycle diesel engine seen along. 2 ... Piston, 3 ... Cylinder head, 3a ... Cylinder head inner wall surface, 5 ... Air supply valve, 7 ... Exhaust valve, 9 ...
Sub-chamber, 10 ... nozzle, 12 ... recess, 14 ... mask wall, 20 ...
… Convex part, 22 …… Guide groove.
───────────────────────────────────────────────────── フロントページの続き (72)考案者 梅花 豊一 愛知県豊田市トヨタ町１番地 トヨタ自 動車株式会社内 (72)考案者 中江 公一 愛知県豊田市トヨタ町１番地 トヨタ自 動車株式会社内 (72)考案者 金子 総志 愛知県豊田市トヨタ町１番地 トヨタ自 動車株式会社内 (56)参考文献 特開 昭63−173814（ＪＰ，Ａ) 実開 昭63−9419（ＪＰ，Ｕ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toyokazu Umebana 1 Toyota Town, Toyota City, Aichi Prefecture Toyota Motor Co., Ltd. (72) Inventor Koichi Nakae 1 Toyota Town, Toyota City, Aichi Prefecture Toyota Motor Co., Ltd. (72) Inventor Soushi Kaneko 1 Toyota Town, Toyota City, Aichi Toyota Motor Co., Ltd. (56) Reference JP-A-63-173814 (JP, A) SAIKAI 63-9419 (JP, U)
Claims (1)
けた副室付２サイクルディーゼル機関において、シリン
ダヘッド内壁面上に形成された凹部内に給気弁を陥没し
て配設せしめると共に排気弁側の給気弁周辺部に排気弁
側の給気弁開口からの新気の流入を抑制する新気流入抑
制壁を設け、前記凹部内に侵入可能な凸部をピストン頂
面上に形成すると共に前記凹部と副室の噴口とを接続す
る案内溝をピストン頂面上に形成した２サイクルディー
ゼル機関。1. In a two-cycle diesel engine with a sub chamber in which a cylinder head is provided with an air supply valve and an exhaust valve, the air supply valve is recessed and disposed in a recess formed on the inner wall surface of the cylinder head, and exhaust is also performed. A fresh air inflow suppression wall that suppresses the inflow of fresh air from the air supply valve opening on the exhaust valve side is provided in the vicinity of the air supply valve on the valve side, and a convex part that can enter the concave part is formed on the top surface of the piston A two-cycle diesel engine having a guide groove formed on the top surface of the piston for connecting the concave portion and the injection port of the auxiliary chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990023787U JP2506676Y2 (en) | 1989-03-30 | 1990-03-12 | 2-cycle diesel engine |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3548989 | 1989-03-30 | ||
| JP1-35489 | 1989-03-30 | ||
| JP1990023787U JP2506676Y2 (en) | 1989-03-30 | 1990-03-12 | 2-cycle diesel engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0319431U JPH0319431U (en) | 1991-02-26 |
| JP2506676Y2 true JP2506676Y2 (en) | 1996-08-14 |
Family
ID=31717508
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990023787U Expired - Lifetime JP2506676Y2 (en) | 1989-03-30 | 1990-03-12 | 2-cycle diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2506676Y2 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5121075U (en) * | 1974-08-01 | 1976-02-16 | ||
| JPS639419U (en) * | 1986-07-02 | 1988-01-22 | ||
| JPS63173814A (en) * | 1987-01-13 | 1988-07-18 | Toyota Motor Corp | Two-cycle internal combustion engine |
-
1990
- 1990-03-12 JP JP1990023787U patent/JP2506676Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0319431U (en) | 1991-02-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0733770B2 (en) | Combustion chamber structure of two-cycle internal combustion engine | |
| JPH07117019B2 (en) | 2-cycle internal combustion engine | |
| JP2506676Y2 (en) | 2-cycle diesel engine | |
| JPH04224231A (en) | Inner cylinder injection type internal combustion engine | |
| JPH0649858Y2 (en) | 2-cycle diesel engine | |
| JPH0494413A (en) | Two-stroke diesel engine | |
| JPH0649856Y2 (en) | 2-cycle diesel engine | |
| JP3903604B2 (en) | In-cylinder direct injection internal combustion engine | |
| JPH0649855Y2 (en) | 2-cycle diesel engine | |
| JPH0720347Y2 (en) | 2-cycle diesel engine | |
| JPH0649857Y2 (en) | 2-cycle diesel engine | |
| JPH0721867Y2 (en) | Combustion chamber structure of two-cycle internal combustion engine | |
| JP2523138Y2 (en) | Fuel injection valve for internal combustion engine | |
| JPH087059Y2 (en) | 2-cycle diesel engine | |
| JPH0649854Y2 (en) | Sub-compartment 2-cycle diesel engine | |
| JPH08246877A (en) | Combustion chamber structure for internal combustion engine | |
| JPH0619802Y2 (en) | Subchamber diesel engine combustion chamber | |
| JPH089377Y2 (en) | Combustion chamber structure of 2-cycle diesel engine | |
| JPH0545789Y2 (en) | ||
| JPH0510137A (en) | Cylinder injection type internal combustion engine | |
| US5950581A (en) | Two-cycle internal combustion engine | |
| JPH0121152Y2 (en) | ||
| JPH089375Y2 (en) | Air-fuel mixture generator for 2-cycle engine | |
| JPH04339129A (en) | Diesel engine having auxiliary chamber | |
| JP2906854B2 (en) | Diesel engine with sub-chamber |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |