JPH094459A - 4-cycle engine with auxiliary combustion chamber - Google Patents
4-cycle engine with auxiliary combustion chamberInfo
- Publication number
- JPH094459A JPH094459A JP7176953A JP17695395A JPH094459A JP H094459 A JPH094459 A JP H094459A JP 7176953 A JP7176953 A JP 7176953A JP 17695395 A JP17695395 A JP 17695395A JP H094459 A JPH094459 A JP H094459A
- Authority
- JP
- Japan
- Prior art keywords
- combustion chamber
- sub
- opening
- chamber
- 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.)
- Pending
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Combustion Methods Of Internal-Combustion Engines (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
Abstract
(57)【要約】
【目的】 本発明は、１回の圧縮行程で経時的に２回の
膨張行程を行わせ、低圧縮比で高膨張比を確保して理論
熱効率を向上させる副燃焼室を持つ４サイクルエンジン
を提供する。
【構成】 本発明は、主燃焼室１と副燃焼室２とを連絡
孔４で連通させ、連絡孔４に副室開閉弁３を設ける。シ
リンダ下部に形成した掃気ポート１１に掃気開閉弁７を
設ける。主燃焼室１に主室スパークプラグ５を設け、副
燃焼室２に副室スパークプラグ６を設ける。副室開閉弁
３の閉鎖状態における圧縮上死点近傍で主室スパークプ
ラグ５で主燃焼室１内の混合気を点火して膨張させ、次
のピストン上死点近傍で副室開閉弁３を開放して副室ス
パークプラグ６で副燃焼室２内の混合気を点火して膨張
させる。
(57) [Summary] [PROBLEMS] The present invention is a sub-combustion chamber for improving the theoretical thermal efficiency by ensuring a high expansion ratio with a low compression ratio by performing two expansion strokes over time in one compression stroke. Providing a 4-cycle engine with. [Constitution] According to the present invention, the main combustion chamber 1 and the sub combustion chamber 2 are communicated with each other through a communication hole 4, and a sub chamber opening / closing valve 3 is provided in the communication hole 4. A scavenging opening / closing valve 7 is provided on a scavenging port 11 formed at the bottom of the cylinder. A main chamber spark plug 5 is provided in the main combustion chamber 1, and a sub chamber spark plug 6 is provided in the sub combustion chamber 2. In the closed state of the auxiliary chamber opening / closing valve 3, the main chamber spark plug 5 ignites and expands the air-fuel mixture in the main combustion chamber 1 near the top dead center, and the sub chamber opening / closing valve 3 is opened near the next piston top dead center. When opened, the auxiliary chamber spark plug 6 ignites and expands the air-fuel mixture in the auxiliary combustion chamber 2.
Description
【０００１】[0001]
【産業上の利用分野】この発明は、副燃焼室を持つ４サ
イクルエンジンに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a 4-cycle engine having a secondary combustion chamber.
【０００２】[0002]
【従来の技術】従来、エンジンの燃焼改善を目的として
副室（副燃焼室）を持つ副室式エンジンが開発されてい
る。このような副室式エンジンは、シリンダヘッド又は
ピストンヘッドに形成した副室、該副室とシリンダ側に
形成した主室（主燃焼室）とを連通する連絡孔及び副室
内に燃料を噴霧する燃料噴射ノズルを有し、連絡孔を通
じて副室に流入する吸入空気によって副室内に噴射され
た燃料とで混合気を形成させて一次燃焼させ、次いで副
室から連絡孔を通じて主室へ火炎、未燃混合気等のガス
を噴出して二次燃焼させている。2. Description of the Related Art Conventionally, a sub-chamber engine having a sub chamber (sub combustion chamber) has been developed for the purpose of improving combustion of the engine. In such a sub-chamber engine, fuel is sprayed into a sub-chamber formed in a cylinder head or a piston head, a communication hole that connects the sub-chamber to a main chamber (main combustion chamber) formed on the cylinder side, and the sub-chamber. It has a fuel injection nozzle, and forms a mixture with the fuel injected into the sub chamber by the intake air flowing into the sub chamber through the communication hole to perform primary combustion, and then the flame from the sub chamber to the main chamber through the communication hole, Gas such as a fuel-air mixture is ejected for secondary combustion.
【０００３】また、実開平２−１４１６２９号公報に
は、副室付きガソリンエンジン構造が開示されている。
該副室付きガソリンエンジン構造は、燃焼室内と連通す
る副室と、副室と燃焼室との間に設けられた副室弁と、
副室内に進退自在に内装され副室内へ吸気を吸排駆動し
うる副ピストンとを有し、吸入及び圧縮行程内の所定の
時点で副ピストンの吸引側への移動と副室弁の開放とに
より燃焼室から副室内へ吸気を吸引し、排気行程の終了
時近くで副ピストンの排出側への移動と副室弁の開放と
により副室内から燃焼室へ吸気を排出できるものであ
る。Japanese Utility Model Laid-Open No. 2-141629 discloses a gasoline engine structure with a sub chamber.
The gasoline engine structure with a sub chamber includes a sub chamber communicating with the combustion chamber, a sub chamber valve provided between the sub chamber and the combustion chamber,
It has a sub-piston that is installed in the sub-chamber so as to be able to move forward and backward, and that can suck and discharge intake air into and from the sub-chamber, and by moving the sub-piston to the suction side and opening the sub-chamber valve at a predetermined point in the suction and compression strokes. The intake air can be sucked from the combustion chamber to the sub chamber, and the intake air can be discharged from the sub chamber to the combustion chamber by moving the sub piston to the discharge side and opening the sub chamber valve near the end of the exhaust stroke.
【０００４】また、特開平５−２４００４９公報には、
６サイクルエンジンが開示されている。該６サイクルエ
ンジンは、シリンダヘッドに設けた空気室を連通孔を通
じて空気室バルブの作動で燃焼室に対して開閉作動し、
吸入行程、第１圧縮行程、第１膨張行程、第２圧縮行
程、第２膨張行程及び排気行程の６サイクルで順次作動
する。空気室バルブを第１圧縮行程で開放して圧縮空気
を空気室に導入し、第２圧縮行程後に燃料噴射ノズルか
ら燃料を噴射し、燃料噴射後に、第２膨張行程で空気室
を開放して圧縮空気を燃焼室に噴射して攪乱する。吸気
バルブは吸入行程と、第１膨張行程後半から第１圧縮行
程の前半までとで開放して燃焼室へ吸入空気を導入す
る。Further, Japanese Patent Laid-Open No. 5-240049 discloses
A 6-cycle engine is disclosed. In the 6-cycle engine, an air chamber provided in a cylinder head is opened and closed with respect to a combustion chamber by operating an air chamber valve through a communication hole,
The intake stroke, the first compression stroke, the first expansion stroke, the second compression stroke, the second expansion stroke, and the exhaust stroke are sequentially operated in 6 cycles. The air chamber valve is opened in the first compression stroke to introduce compressed air into the air chamber, the fuel is injected from the fuel injection nozzle after the second compression stroke, and the air chamber is opened in the second expansion stroke after the fuel injection. Compressed air is injected into the combustion chamber and disturbed. The intake valve opens in the intake stroke and in the latter half of the first expansion stroke to the first half of the first compression stroke to introduce intake air into the combustion chamber.
【０００５】また、主室と副室とを連通する連絡孔に分
割弁を設けたものは、例えば、特開平３−２０２６６８
号公報に開示されている。また、６サイクル断熱エンジ
ンは、例えば、特開平３−１１５７４３号公報に開示さ
れている。Further, the one in which a dividing valve is provided in a communication hole which communicates the main chamber and the sub chamber is disclosed in, for example, Japanese Unexamined Patent Publication No. 3-202668.
No. 6,086,045. A 6-cycle adiabatic engine is disclosed in, for example, Japanese Patent Laid-Open No. 3-115574.
【０００６】[0006]
【発明が解決しようとする課題】一般に、ガソリンエン
ジンは、ディーゼルエンジンに比べて理論熱効率が低い
ものである。その理由は、ガソリンエンジンでは、圧縮
比を高くすると、ノッキングが発生し、エンジンの運転
ができなくなるため、ディーゼルエンジンに比べて圧縮
比が低く設定されているためである。これに対し、ディ
ーゼルエンジンは、空気のみを吸入し、該空気を圧縮し
た後に圧縮空気中に燃料を噴射するため、ノッキングは
発生しない。１気筒当たり５００ｃｃ程度のエンジンの
圧縮比は、上記の理由により、通常、ガソリンエンジン
は８〜１１程度であり、ディーゼルエンジンは１６〜２
３程度である。このことが、ディーゼルエンジンがガソ
リンエンジンに比較して燃費が優れている最も大きな要
因である。Generally, a gasoline engine has a lower theoretical thermal efficiency than a diesel engine. The reason is that in a gasoline engine, if the compression ratio is increased, knocking occurs and the engine cannot operate, so the compression ratio is set lower than that of the diesel engine. On the other hand, the diesel engine sucks only air, compresses the air, and then injects the fuel into the compressed air, so that knocking does not occur. The compression ratio of an engine of about 500 cc per cylinder is usually about 8 to 11 for a gasoline engine and 16 to 2 for a diesel engine for the above reason.
It is about 3. This is the main reason why diesel engines have better fuel economy than gasoline engines.
【０００７】一方、ガソリンエンジンは、予混合燃焼タ
イプであり、燃料と空気との混合比も理論空燃費近傍で
運転され、３元触媒等を用いることにより、ＮＯX の極
めて低いエンジンを構成することが可能である。しかし
ながら、ディーゼルエンジンでは、排気ガスの後浄化処
理が困難であり、排気ガスの種々の開発が行われている
のが現状である。更に、エンジンに対する上記の理論熱
効率は、圧縮比によって左右されるのではなく、膨張比
に左右されるものである。しかしながら、一般的に、往
復動エンジンでは圧縮比と膨張比は同一であるため、ガ
ソリンエンジンのＮＯX の低減と高膨張比即ち高理論熱
効率とは両立しないものである。On the other hand, the gasoline engine is of the premixed combustion type, and the fuel / air mixture ratio is also operated in the vicinity of the theoretical fuel consumption, and a three-way catalyst or the like is used to construct an engine with extremely low NO x. It is possible. However, in a diesel engine, it is difficult to perform a post-purification process of exhaust gas, and various developments of exhaust gas are currently under way. Furthermore, the above theoretical thermal efficiency for an engine is dependent on the expansion ratio, not the compression ratio. However, in general, the expansion ratio and compression ratio in a reciprocating engine are the same, in which incompatible with reduction and expansion ratio or high theoretical thermal efficiency of the NO X in the gasoline engine.
【０００８】この発明の目的は、上記の課題を解決する
ことであり、火花点火式エンジンであるにもかかわら
ず、ディーゼルエンジンと同等或いはそれ以上の理論熱
効率を得ることができ、１回の圧縮行程で２回の膨張行
程を行わせて圧縮比に対する膨張比を大きく構成して理
論熱効率をアップすると共に、高過給を可能にし、それ
によって圧縮比を低く設定することを可能にして筒内最
高圧力を低くして強度上の問題を排除し、当量比１近く
の燃焼を行わせることによって三元触媒の利用を可能に
してＮＯX 等の発生を低減する副燃焼室を持つ４サイク
ルエンジンを提供することである。An object of the present invention is to solve the above-mentioned problems. Even though it is a spark ignition type engine, it is possible to obtain a theoretical thermal efficiency equal to or higher than that of a diesel engine, and it is possible to perform compression once. In the cylinder, the expansion stroke is performed twice in the stroke to increase the expansion ratio with respect to the compression ratio to increase the theoretical thermal efficiency, and at the same time, to enable high supercharging and thereby to set the compression ratio low. the maximum pressure was lowered to eliminate strength problems, 4-cycle engine with auxiliary combustion chamber to reduce the occurrence of NO X to enable the use of the three-way catalyst by causing the equivalent ratio 1 near the combustion Is to provide.
【０００９】この発明の別の目的は、上記の課題を解決
することであり、ＮＯX の生成を低減できる予混合燃焼
であるディーゼル４サイクルであると共に、１回の圧縮
行程で２回の膨張行程を行わせて圧縮比に対する膨張比
を大きく構成して理論熱効率をアップすると共に、圧縮
比を低く設定しても十分な膨張比を確保できるため吸気
圧力を高くすることができ、ＮＯX 等の発生を低減し、
高い出力を得ることができる副燃焼室を持つ４サイクル
エンジンを提供することである。Another object of the present invention is to solve the above problems, as well as a diesel 4-cycle is a premix combustion that can reduce the production of NO X, 2 times expansion in one compression stroke By performing a stroke, the expansion ratio with respect to the compression ratio is increased to improve the theoretical thermal efficiency, and even if the compression ratio is set low, a sufficient expansion ratio can be secured, so that the intake pressure can be increased and NO x, etc. Reduce the occurrence of
It is an object of the present invention to provide a four-cycle engine having an auxiliary combustion chamber capable of obtaining a high output.
【００１０】[0010]
【課題を解決するための手段】この発明は、上記目的を
達成するため、次のように構成されている。即ち、この
発明は、シリンダ側に形成される主燃焼室、シリンダヘ
ッドに形成された副燃焼室、前記主燃焼室と前記副燃焼
室を連通する連絡孔を開閉する副室開閉弁、シリンダ下
部に設けた掃気ポートに設けた掃気開閉弁、前記主燃焼
室に設けられた主室スパークプラグ、前記副燃焼室に設
けられた副室スパークプラグ、及び混合気を生成するた
め吸入空気中に燃料を噴射する燃料噴射ノズルを有し、
掃気行程で前記掃気開閉弁を開放して前記シリンダ内に
空気を吸入すると共に排気弁が閉鎖した時点で前記燃料
噴射ノズルから燃料を吸入空気中に噴射して混合気を生
成し、次いで混合気を前記副室開閉弁の開放状態で圧縮
し、圧縮上死点近傍で前記副室開閉弁を閉鎖して前記主
室スパークプラグで前記主燃焼室内の混合気を点火して
膨張させ、膨張行程終端付近で前記排気弁を開放して前
記主燃焼室内の燃焼ガスを排気し、排気行程のピストン
上死点近傍で前記副室開閉弁を開放すると共に、前記副
室スパークプラグで前記副燃焼室内の混合気を点火して
膨張させ、次いで膨張行程終端付近で前記排気弁を開放
すると共に前記掃気開閉弁を開放して掃気するサイクル
を繰り返して駆動されることを特徴とする副燃焼室を持
つ４サイクルエンジンに関する。The present invention is configured as follows to achieve the above object. That is, the present invention is directed to a main combustion chamber formed on the cylinder side, a sub combustion chamber formed in a cylinder head, a sub chamber opening / closing valve for opening and closing a communication hole that connects the main combustion chamber and the sub combustion chamber, and a cylinder lower part. Scavenging valve provided in the scavenging port provided in the main combustion chamber, the main chamber spark plug provided in the main combustion chamber, the auxiliary chamber spark plug provided in the auxiliary combustion chamber, and the fuel in the intake air for producing the air-fuel mixture. Has a fuel injection nozzle for injecting
In the scavenging stroke, the scavenging opening / closing valve is opened to suck air into the cylinder, and at the time when the exhaust valve is closed, the fuel is injected from the fuel injection nozzle into the intake air to generate the air-fuel mixture, and then the air-fuel mixture is mixed. In the opened state of the sub chamber opening / closing valve, closes the sub chamber opening / closing valve near the compression top dead center and ignites and expands the air-fuel mixture in the main combustion chamber with the main chamber spark plug to expand the expansion stroke. The exhaust valve is opened near the end to exhaust the combustion gas in the main combustion chamber, the sub chamber opening / closing valve is opened near the piston top dead center in the exhaust stroke, and the sub chamber spark plug is used to open the sub combustion chamber. Has a sub-combustion chamber characterized by being driven by repeating a cycle of igniting and expanding the air-fuel mixture, and then opening the exhaust valve near the end of the expansion stroke and opening the scavenging on-off valve to perform scavenging. 4 cycle en On down.
【００１１】又は、この発明は、シリンダ側に形成され
る主燃焼室、シリンダヘッドに形成された第１副燃焼室
と第２副燃焼室、前記主燃焼室と前記第１副燃焼室を連
通する連絡孔を開閉する第１開閉弁、前記主燃焼室と前
記第２副燃焼室を連通する連絡孔を開閉する第２開閉
弁、前記第１副燃焼室に設けられた第１スパークプラ
グ、前記第２副燃焼室に設けられた第２スパークプラ
グ、及び混合気を生成するため吸入空気中に燃料を噴射
する燃料噴射ノズルを有し、掃気行程で前記掃気開閉弁
を開放して前記シリンダ内に空気を吸入すると共に排気
弁が閉鎖した時点で前記燃料噴射ノズルから燃料を吸入
空気中に噴射して混合気を生成し、次いで混合気を前記
第１開閉弁と前記第２開閉弁との開放状態で圧縮し、ピ
ストン上死点近傍で前記第１開閉弁を閉鎖して前記第２
スパークプラグで前記第２副燃焼室内の混合気を点火し
て膨張させ、膨張行程終端付近で排気弁を開放して筒内
の燃焼ガスを排気し、排気行程のピストン上死点近傍で
前記２開閉弁を閉鎖して前記第１開閉弁を開放すると同
時に前記第１スパークプラグで前記第１副燃焼室内の混
合気を点火して膨張させ、次いで膨張行程終端付近で前
記排気弁を開放すると共に前記掃気開閉弁を開放して筒
内の燃焼ガスを掃気するサイクルを繰り返して駆動され
ることを特徴とする副燃焼室を持つ４サイクルエンジン
に関する。Alternatively, according to the present invention, the main combustion chamber formed on the cylinder side, the first auxiliary combustion chamber and the second auxiliary combustion chamber formed on the cylinder head, and the main combustion chamber and the first auxiliary combustion chamber communicate with each other. A first opening / closing valve for opening / closing a communication hole, a second opening / closing valve for opening / closing a communication hole connecting the main combustion chamber and the second auxiliary combustion chamber, and a first spark plug provided in the first auxiliary combustion chamber, The cylinder has a second spark plug provided in the second auxiliary combustion chamber and a fuel injection nozzle that injects fuel into intake air to generate an air-fuel mixture, and opens the scavenging opening / closing valve in a scavenging stroke. When air is sucked in and the exhaust valve is closed, fuel is injected from the fuel injection nozzle into the intake air to generate an air-fuel mixture, and then the air-fuel mixture is supplied to the first opening / closing valve and the second opening / closing valve. Compressed in the open state of the Said closed-off valve second
The spark plug ignites and expands the air-fuel mixture in the second auxiliary combustion chamber, opens the exhaust valve near the end of the expansion stroke to exhaust the combustion gas in the cylinder, and closes the piston near the top dead center of the piston in the exhaust stroke. At the same time as closing the opening / closing valve and opening the first opening / closing valve, the first spark plug ignites and expands the air-fuel mixture in the first auxiliary combustion chamber, and then opens the exhaust valve near the end of the expansion stroke. The present invention relates to a four-cycle engine having a sub-combustion chamber, which is driven by repeating a cycle of opening the scavenging opening / closing valve and scavenging combustion gas in a cylinder.
【００１２】或いは、この発明は、シリンダ側に形成さ
れる主燃焼室、シリンダヘッドに形成された副燃焼室、
前記主燃焼室と前記副燃焼室を連通する連絡孔を開閉す
る副室開閉弁、シリンダ下部に設けた掃気ポートに設け
た掃気開閉弁、前記主燃焼室に設けられた主室燃料噴射
ノズル、及び前記副燃焼室に設けられた副室燃料噴射ノ
ズルを有し、圧縮上死点近傍で前記副室開閉弁を閉鎖し
て前記主室燃料噴射ノズルで前記主燃焼室に燃料を噴射
して着火燃焼させて膨張させ、膨張行程終端付近で前記
副室開閉弁を開放して前記副室燃料噴射ノズルで前記副
燃焼室に燃料を噴射して着火燃焼させて膨張させること
を特徴とする副燃焼室を持つ４サイクルエンジンに関す
る。Alternatively, according to the present invention, a main combustion chamber formed on the cylinder side, an auxiliary combustion chamber formed on the cylinder head,
A sub-chamber opening / closing valve that opens and closes a communication hole that connects the main combustion chamber and the sub-combustion chamber, a scavenging opening / closing valve provided in a scavenging port provided at the bottom of the cylinder, a main-chamber fuel injection nozzle provided in the main combustion chamber, And a sub-chamber fuel injection nozzle provided in the sub-combustion chamber, the sub-chamber on-off valve is closed near the compression top dead center, and fuel is injected into the main combustion chamber by the main-chamber fuel injection nozzle. Ignition combustion is performed to expand, the sub-chamber opening / closing valve is opened near the end of the expansion stroke, and fuel is injected into the sub-combustion chamber by the sub-chamber fuel injection nozzle to be ignited and burned to be expanded. It relates to a 4-cycle engine with a combustion chamber.
【００１３】又は、この発明は、シリンダ側に形成され
た主燃焼室、シリンダヘッドに形成された第１副燃焼室
と第２副燃焼室、前記主燃焼室と前記第１副燃焼室を連
通する連絡孔を開閉する第１開閉弁、前記主燃焼室と前
記第２副燃焼室を連通する連絡孔を開閉する第２開閉
弁、前記第１副燃焼室に設けられた第１燃料噴射ノズ
ル、及び前記第２副燃焼室に設けられた第２燃料噴射ノ
ズルを有し、前記第１開閉弁の閉鎖状態で前記第２開閉
弁を開放した圧縮上死点近傍で前記第２燃料噴射ノズル
で前記第２副燃焼室に燃料を噴射して着火燃焼させて膨
張させ、排気行程のピストン上死点近傍で前記第２開閉
弁の閉鎖状態で前記第１開閉弁を開放して前記第１燃料
噴射ノズルで前記第１副燃焼室に燃料を噴射して着火燃
焼させて膨張させることを特徴とする副燃焼室を持つ４
サイクルエンジンに関する。Alternatively, according to the present invention, the main combustion chamber formed on the cylinder side, the first auxiliary combustion chamber and the second auxiliary combustion chamber formed on the cylinder head, and the main combustion chamber and the first auxiliary combustion chamber communicate with each other. A first opening / closing valve for opening / closing a communication hole, a second opening / closing valve for opening / closing a communication hole communicating the main combustion chamber and the second auxiliary combustion chamber, and a first fuel injection nozzle provided in the first auxiliary combustion chamber. And a second fuel injection nozzle provided in the second auxiliary combustion chamber, and the second fuel injection nozzle near the compression top dead center where the second on-off valve is opened in the closed state of the first on-off valve. The fuel is injected into the second auxiliary combustion chamber to ignite, burn, and expand, and the first opening / closing valve is opened in the closed state of the second opening / closing valve near the piston top dead center in the exhaust stroke to open the first opening / closing valve. A fuel injection nozzle is used to inject fuel into the first sub-combustion chamber for ignition, combustion, and expansion. 4 having the secondary combustion chamber, wherein
Regarding the cycle engine.
【００１４】[0014]
【作用】この発明による副燃焼室を持つ４サイクルエン
ジンは、上記のように構成され、次のように作用する。
即ち、この副燃焼室を持つ４サイクルエンジンは、掃気
・吸入−圧縮行程、膨張行程、排気行程及び膨張行程か
ら成る４つの行程で１つのサイクルを構成するものであ
り、主燃焼室と副燃焼室を連通する連絡孔を開閉する副
室開閉弁の閉鎖状態における圧縮上死点近傍で主室スパ
ークプラグで前記主燃焼室内の混合気を点火して膨張さ
せ、次のピストン上死点近傍で前記副室開閉弁を開放し
て副室スパークプラグで前記副燃焼室内の混合気を点火
して膨張させるので、前記主燃焼室と前記副燃焼室とに
存在する圧縮された混合気を経時的にそれぞれ独立して
スパークプラグで点火して膨張させることができ、一回
の圧縮行程で二回の膨張行程を行うことができ、圧縮比
に対して膨張比を大きくすることができ、理論熱効率を
大幅に向上させることができる。この場合には、前記副
燃焼室を２個設け、前記副燃焼室にそれぞれ前記副室ス
パークプラグを設けることができる。また、燃料噴射ノ
ズルから燃料を吸入空気中に噴射して混合気の生成のた
め、前記燃料噴射ノズルは掃気ポートに設けることがで
きるが、燃焼室内に燃料を直接噴射することもできる。
前記燃焼室内に燃料を直接噴射する場合には、前記燃料
噴射ノズルを前記主燃焼室に設けるか又は前記主燃焼室
と前記副燃焼室に設けることができる。或いは、この副
燃焼室を持つ４サイクルエンジンは、上記構成の火花点
火式４サイクルエンジンにおけるスパークプラグを燃料
噴射ノズルに代えてディーゼルエンジンに構成すること
もできる。The four-cycle engine having the auxiliary combustion chamber according to the present invention is constructed as described above and operates as follows.
That is, a four-cycle engine having this auxiliary combustion chamber constitutes one cycle with four strokes including a scavenging / intake-compression stroke, an expansion stroke, an exhaust stroke and an expansion stroke. In the vicinity of the top dead center of compression in the closed state of the sub-chamber on-off valve that opens and closes the communication hole that communicates with the chamber, the main chamber spark plug ignites and expands the air-fuel mixture in the main combustion chamber, and near the top dead center of the next piston. Since the sub chamber opening / closing valve is opened and the sub chamber spark plug ignites and expands the air-fuel mixture in the sub-combustion chamber, the compressed air-fuel mixture existing in the main combustion chamber and the sub-combustion chamber is aged. Each of them can be independently ignited by a spark plug to be expanded, two compression strokes can be performed in one compression stroke, the expansion ratio can be increased relative to the compression ratio, and the theoretical thermal efficiency can be increased. Greatly improve Door can be. In this case, two auxiliary combustion chambers may be provided, and the auxiliary combustion chamber plugs may be provided in the auxiliary combustion chambers. Further, since the fuel is injected from the fuel injection nozzle into the intake air to generate the air-fuel mixture, the fuel injection nozzle can be provided in the scavenging port, but the fuel can also be directly injected into the combustion chamber.
When the fuel is directly injected into the combustion chamber, the fuel injection nozzle may be provided in the main combustion chamber or in the main combustion chamber and the sub combustion chamber. Alternatively, the 4-cycle engine having this auxiliary combustion chamber may be configured as a diesel engine in place of the fuel injection nozzle for the spark plug in the spark ignition 4-cycle engine having the above-described configuration.
【００１５】又は、この副燃焼室を持つ４サイクルエン
ジンは、掃気・吸入−圧縮行程、膨張行程、排気行程及
び膨張行程から成る４つの行程で１つのサイクルを構成
するものであり、シリンダヘッドに第１副燃焼室と第２
副燃焼室を設け、前記第１副燃焼室の第１開閉弁の閉鎖
状態で前記第２副燃焼室の第２開閉弁を開放した圧縮上
死点近傍で前記第２副燃焼室を設けた第２スパークプラ
グで混合気を点火して膨張させ、次のピストン上死点近
傍で前記第２開閉弁の閉鎖状態で前記第１開閉弁を開放
して前記第１副燃焼室の第１スパークプラグで混合気を
点火して膨張させるので、前記第１副燃焼室と前記第２
副燃焼室とに存在する圧縮された混合気を経時的にそれ
ぞれ独立してスパークプラグで点火して膨張させること
ができ、一回の圧縮行程で二回の膨張行程を行うことが
でき、圧縮比に対して膨張比を大きくすることができ、
理論熱効率を大幅に向上させることができる。また、燃
料噴射ノズルから燃料を吸入空気中に噴射して混合気の
生成のため、前記燃料噴射ノズルは掃気ポートに設ける
ことができるが、燃焼室内に燃料を直接噴射することも
できる。前記燃焼室内に燃料を直接噴射する場合には、
前記燃料噴射ノズルを前記主燃焼室に設けるか又は前記
第１副燃焼室と前記第２副燃焼室とに設けることができ
る。或いは、この副燃焼室を持つ４サイクルエンジン
は、上記構成の火花点火式４サイクルエンジンにおける
スパークプラグを燃料噴射ノズルに代えてディーゼルエ
ンジンに構成することができる。Alternatively, a four-cycle engine having this auxiliary combustion chamber constitutes one cycle with four strokes including a scavenging / intake-compression stroke, an expansion stroke, an exhaust stroke and an expansion stroke, and a cylinder head First sub-combustion chamber and second
A sub combustion chamber is provided, and the second sub combustion chamber is provided near the compression top dead center where the second on / off valve of the second sub combustion chamber is opened with the first on / off valve of the first sub combustion chamber closed. The second spark plug ignites and expands the air-fuel mixture, and in the vicinity of the next piston top dead center, the second on-off valve is closed and the first on-off valve is opened to open the first spark of the first auxiliary combustion chamber. Since the mixture is ignited and expanded by the plug, the first auxiliary combustion chamber and the second auxiliary combustion chamber
The compressed air-fuel mixture existing in the auxiliary combustion chamber and the compressed air-fuel mixture can be independently ignited and expanded with a spark plug over time, and two expansion strokes can be performed in one compression stroke. The expansion ratio can be increased relative to the ratio,
The theoretical thermal efficiency can be greatly improved. Further, since the fuel is injected from the fuel injection nozzle into the intake air to generate the air-fuel mixture, the fuel injection nozzle can be provided in the scavenging port, but the fuel can also be directly injected into the combustion chamber. When directly injecting fuel into the combustion chamber,
The fuel injection nozzle may be provided in the main combustion chamber, or may be provided in the first auxiliary combustion chamber and the second auxiliary combustion chamber. Alternatively, the four-cycle engine having this auxiliary combustion chamber can be configured as a diesel engine in place of the fuel injection nozzle for the spark plug in the spark ignition type four-cycle engine having the above configuration.
【００１６】[0016]
【実施例】この発明による副燃焼室を持つ４サイクルエ
ンジンは、火花点火式４サイクルエンジン或いは４サイ
クルディーゼルエンジンに適用することができるが、こ
こでは、火花点火式４サイクルエンジンについての実施
例について説明する。従って、この発明による副燃焼室
を持つ４サイクルエンジンは、スパークプラグを燃料噴
射ノズルに代えて火花点火式エンジンで用いた燃料噴射
ノズルを排除することによってディーゼルエンジンに構
成することができるものである。EXAMPLE A four-cycle engine having a sub-combustion chamber according to the present invention can be applied to a spark ignition type four cycle engine or a four cycle diesel engine. Here, an example of a spark ignition type four cycle engine will be described. explain. Therefore, the four-cycle engine having the auxiliary combustion chamber according to the present invention can be configured as a diesel engine by replacing the spark plug with the fuel injection nozzle and eliminating the fuel injection nozzle used in the spark ignition type engine. .
【００１７】以下、図１〜図４を参照して、この発明に
よる副燃焼室を持つ火花点火式４サイクルエンジンの実
施例を説明する。図１はこの発明による副燃焼室を持つ
火花点火式４サイクルエンジンの一実施例を示すシリン
ダヘッド下面の平面図、図２は図１の線Ａ−Ａにおける
断面図、図３は図１の線Ｂ−Ｂにおける断面図、及び図
４は図１の副燃焼室を持つ火花点火式４サイクルエンジ
ンの作動タイミングを示す線図である。An embodiment of a spark ignition type four-cycle engine having an auxiliary combustion chamber according to the present invention will be described below with reference to FIGS. 1 is a plan view of a lower surface of a cylinder head showing an embodiment of a spark ignition type four-cycle engine having an auxiliary combustion chamber according to the present invention, FIG. 2 is a sectional view taken along line AA in FIG. 1, and FIG. FIG. 4 is a cross-sectional view taken along the line BB, and FIG. 4 is a diagram showing the operation timing of the spark ignition type four-cycle engine having the auxiliary combustion chamber of FIG.
【００１８】この副燃焼室を持つ火花点火式４サイクル
エンジンは、シリンダ２０を構成するシリンダブロック
１５、シリンダブロック１５にガスケット２１を介して
固定したシリンダヘッド１０、及びシリンダ２０内を往
復運動するピストン９を有している。この火花点火式４
サイクルエンジンは、シリンダヘッド１０に副燃焼室２
が形成されている。シリンダブロック１５にはエンジン
の気筒数に対応する孔部１９が形成され、該孔部１９に
シリンダ２０を形成したシリンダライナ１６を嵌合して
もよく、又は、図示していないが、これらの孔部１９に
よってシリンダ２０を構成してもよいものである。シリ
ンダヘッド１０には、２つの排気ポート１２が形成さ
れ、排気ポート１２のバルブシート１８には排気弁８が
配置されている。シリンダ下部には、掃気ポート１１が
形成され、掃気ポート１１にはロータリバルブ等の掃気
開閉弁７が設けられている。A spark ignition type four-cycle engine having this auxiliary combustion chamber comprises a cylinder block 15 constituting a cylinder 20, a cylinder head 10 fixed to the cylinder block 15 via a gasket 21, and a piston reciprocating in the cylinder 20. Have nine. This spark ignition type 4
The cycle engine includes a cylinder head 10 and a secondary combustion chamber 2
Are formed. The cylinder block 15 may be formed with holes 19 corresponding to the number of cylinders of the engine, and a cylinder liner 16 having a cylinder 20 may be fitted into the holes 19, or although not shown, The hole 20 may constitute the cylinder 20. Two exhaust ports 12 are formed in the cylinder head 10, and an exhaust valve 8 is arranged in a valve seat 18 of the exhaust port 12. A scavenging port 11 is formed in the lower portion of the cylinder, and the scavenging port 11 is provided with a scavenging opening / closing valve 7 such as a rotary valve.
【００１９】この火花点火式４サイクルエンジンは、特
に、シリンダ２０側に形成された主燃焼室１、シリンダ
ヘッド１０に形成された副燃焼室２、主燃焼室１と副燃
焼室２を連通する連絡孔４を開閉する副室開閉弁３、主
燃焼室１に設けられた主室スパークプラグ５、及び副燃
焼室２に設けられた副室スパークプラグ６を有してい
る。主燃焼室１は、主として、ピストン９のピストン頂
部に形成した凹部２２及びシリンダヘッド１０の下面と
で形成されている。副室開閉弁３はカム等から構成され
た動弁機構で開閉するように構成できる。また、図で
は、吸入空気中に燃料を噴射して混合気を生成するた
め、燃料噴射ノズル１４が主燃焼室１に設けられている
が、場合によっては、燃料噴射ノズル１４を掃気ポート
１１に設けることもでき、或いは、燃料噴射ノズル１４
を主燃焼室１と副燃焼室２にそれぞれ設けることもでき
る。In this spark ignition type four-cycle engine, in particular, the main combustion chamber 1 formed on the cylinder 20 side, the sub combustion chamber 2 formed in the cylinder head 10, and the main combustion chamber 1 and the sub combustion chamber 2 are communicated with each other. It has a sub chamber opening / closing valve 3 for opening / closing the communication hole 4, a main chamber spark plug 5 provided in the main combustion chamber 1, and a sub chamber spark plug 6 provided in the sub combustion chamber 2. The main combustion chamber 1 is mainly formed by a recess 22 formed in the piston top of the piston 9 and the lower surface of the cylinder head 10. The sub chamber opening / closing valve 3 can be configured to be opened / closed by a valve mechanism including a cam or the like. Further, in the drawing, the fuel injection nozzle 14 is provided in the main combustion chamber 1 in order to inject the fuel into the intake air to generate the air-fuel mixture, but in some cases, the fuel injection nozzle 14 is provided in the scavenging port 11. It may be provided or the fuel injection nozzle 14
Can be provided in each of the main combustion chamber 1 and the sub combustion chamber 2.
【００２０】この火花点火式４サイクルエンジンは、エ
ンジンの２回転、即ち、掃気・吸入−圧縮行程、膨張行
程、排気行程及び膨張行程から成る４つの行程で１つの
サイクルを構成するものであり、その間にピストン９は
シリンダ２０内を２回往復運動する。この火花点火式４
サイクルエンジンは、副室開閉弁３が連絡孔４を閉鎖し
ている圧縮上死点近傍で主室スパークプラグ５の点火に
よって主燃焼室１内に存在する混合気を点火し爆発して
膨張し、ピストン９を押し下げて仕事をする。次いで、
排気行程の上死点近傍で副室開閉弁３が連絡孔４を開放
すると同時に副室スパークプラグ６の点火によって副燃
焼室２内の混合気が点火し爆発して膨張し、ピストン９
を押し下げて仕事をする。この火花点火式４サイクルエ
ンジンの具体的な作動の例を次に説明する。In this spark ignition type four-cycle engine, one cycle is constituted by two revolutions of the engine, that is, four strokes including a scavenging / intake-compression stroke, an expansion stroke, an exhaust stroke and an expansion stroke. Meanwhile, the piston 9 reciprocates twice in the cylinder 20. This spark ignition type 4
The cycle engine ignites the air-fuel mixture existing in the main combustion chamber 1 by the ignition of the main chamber spark plug 5 near the compression top dead center where the auxiliary chamber opening / closing valve 3 closes the communication hole 4, and explodes and expands. , Push down the piston 9 to work. Then
In the vicinity of the top dead center of the exhaust stroke, the auxiliary chamber opening / closing valve 3 opens the communication hole 4, and at the same time, the ignition of the auxiliary chamber spark plug 6 ignites and explodes the air-fuel mixture in the auxiliary combustion chamber 2 to expand the piston 9
Work by pushing down. An example of a specific operation of this spark ignition type 4-cycle engine will be described below.
【００２１】この火花点火式４サイクルエンジンの作動
について、ピストン９の変位に対する副室開閉弁３、掃
気ポート１１、掃気開閉弁７及び排気弁８の開閉タイミ
ング、及び主室スパークプラグ５と副室スパークプラグ
６との点火タイミングが図４に示されている。まず、掃
気・吸入−圧縮行程では、副室開閉弁３、排気弁８及び
掃気開閉弁７が開放して燃焼室内の燃焼ガスは排気ポー
ト１２を通じて排気されると共に燃焼室内に吸入空気が
導入され、ピストン９の上昇によって掃気ポート１１が
閉鎖されて掃気開閉弁７と排気弁８が閉鎖される。そこ
で、燃焼室内の吸入空気が圧縮されるが、この時、燃料
噴射ノズル１４から主燃焼室１内に燃料が噴射され、混
合気が生成され、主燃焼室１と副燃焼室２との圧縮混合
気が充満する。ピストン９が圧縮上死点近傍で副室開閉
弁３が閉鎖されると、主室スパークプラグ５で主燃焼室
１内の混合気を点火して膨張させ、ピストン９が下降し
て仕事をする。Regarding the operation of this spark ignition type four-cycle engine, the opening / closing timing of the sub chamber opening / closing valve 3, the scavenging port 11, the scavenging opening / closing valve 7 and the exhaust valve 8 with respect to the displacement of the piston 9 and the main chamber spark plug 5 and the sub chamber The ignition timing with the spark plug 6 is shown in FIG. First, in the scavenging / intake-compression process, the sub-chamber opening / closing valve 3, the exhaust valve 8 and the scavenging opening / closing valve 7 are opened, the combustion gas in the combustion chamber is exhausted through the exhaust port 12, and the intake air is introduced into the combustion chamber. As the piston 9 rises, the scavenging port 11 is closed and the scavenging opening / closing valve 7 and the exhaust valve 8 are closed. Therefore, the intake air in the combustion chamber is compressed. At this time, the fuel is injected from the fuel injection nozzle 14 into the main combustion chamber 1 to generate an air-fuel mixture, and the main combustion chamber 1 and the sub combustion chamber 2 are compressed. The mixture is full. When the piston 9 closes the sub-chamber on-off valve 3 near the compression top dead center, the main chamber spark plug 5 ignites and expands the air-fuel mixture in the main combustion chamber 1, and the piston 9 descends to perform work. .
【００２２】ピストン９が下降して下死点近傍になって
掃気ポート１１は開口するが、掃気開閉弁７は閉鎖して
いるので、吸入空気が燃焼室を含むシリンダ２０内へ導
入されない。そこで、排気弁８が開放してピストン９の
上昇に応じて主燃焼室１内の燃焼ガスが排気ポート１２
を通じて外部に排出される。ピストン９が上死点近傍に
来ると、副室開閉弁３が開放して副室スパークプラグ６
で副燃焼室２内の混合気を点火して膨張させ、ピストン
９が下降して仕事をする。ピストン９が下死点近傍に到
達する時点で掃気ポート１１が開放し、掃気開閉弁７が
開放すると共に、排気弁８が開放する。ピストン９は下
死点から上死点へ変位すると共に、副燃焼室２と主燃焼
室１内の燃焼ガスは排気ポート１２を通じて筒内から外
部へ排気される。ピストン９の上昇によって掃気ポート
１１が閉鎖すると共に掃気開閉弁７が閉鎖する。次い
で、排気弁８が閉鎖して燃焼室内の吸入空気が圧縮され
ると共に、燃料噴射ノズル１４から燃料が主燃焼室１内
に噴射され、燃焼室内に混合気が生成される。この火花
点火式４サイクルエンジンは、これによって１つのサイ
クルが完結されることになり、これらのサイクルを繰り
返して駆動されることになる。The scavenging port 11 opens while the piston 9 descends to the vicinity of the bottom dead center, but the scavenging opening / closing valve 7 is closed, so intake air is not introduced into the cylinder 20 including the combustion chamber. Therefore, as the exhaust valve 8 is opened and the piston 9 rises, the combustion gas in the main combustion chamber 1 is exhausted to the exhaust port 12
Is discharged to the outside through. When the piston 9 comes near the top dead center, the sub chamber opening / closing valve 3 opens and the sub chamber spark plug 6 opens.
Then, the air-fuel mixture in the auxiliary combustion chamber 2 is ignited and expanded, and the piston 9 descends to perform work. When the piston 9 reaches the vicinity of the bottom dead center, the scavenging port 11 opens, the scavenging opening / closing valve 7 opens, and the exhaust valve 8 opens. The piston 9 is displaced from the bottom dead center to the top dead center, and the combustion gas in the auxiliary combustion chamber 2 and the main combustion chamber 1 is exhausted from the inside of the cylinder to the outside through the exhaust port 12. As the piston 9 rises, the scavenging port 11 is closed and the scavenging opening / closing valve 7 is closed. Next, the exhaust valve 8 is closed and the intake air in the combustion chamber is compressed, and at the same time, the fuel is injected from the fuel injection nozzle 14 into the main combustion chamber 1 to generate an air-fuel mixture in the combustion chamber. In this spark ignition type four-cycle engine, one cycle is completed by this, and these cycles are repeatedly driven.
【００２３】次に、図５〜図８を参照して、この発明に
よる副燃焼室を持つ火花点火式４サイクルエンジンの別
の実施例を説明する。図５はこの発明による副燃焼室を
持つ火花点火式４サイクルエンジンの別の実施例を示す
平面図、図６は図５の線Ｃ−Ｃにおける断面図、図７は
図５の線Ｄ−Ｄにおける断面図、及び図８は図５の副燃
焼室を持つ火花点火式４サイクルエンジンの作動タイミ
ングを示す線図である。この実施例の火花点火式４サイ
クルエンジンは、上記実施例と比較して、副燃焼室をシ
リンダヘッドに２個設け、各副燃焼室にスパークプラグ
をそれぞれ設け、限りなく容積が小さく設計された主燃
焼室を有し且つ主燃焼室にはスパークプラグを設けてい
ない点で相違するが、作動そのものは実質的に同様に行
われるものであり、一方の副燃焼室内の混合気を点火爆
発させ、次いで、他方の副燃焼室内の混合気を点火爆発
させるものであり、１回の圧縮行程で２回の膨張行程を
行うものである。Next, another embodiment of the spark ignition type four-cycle engine having the auxiliary combustion chamber according to the present invention will be described with reference to FIGS. 5 is a plan view showing another embodiment of a spark ignition type four-cycle engine having an auxiliary combustion chamber according to the present invention, FIG. 6 is a sectional view taken along line C-C in FIG. 5, and FIG. 7 is line D- in FIG. FIG. 8 is a sectional view taken along line D, and FIG. 8 is a diagram showing the operation timing of the spark ignition four-cycle engine having the auxiliary combustion chamber shown in FIG. The spark ignition type four-cycle engine of this embodiment is designed to have an infinitely small volume as compared with the above-mentioned embodiment by providing two auxiliary combustion chambers in the cylinder head and providing a spark plug in each auxiliary combustion chamber. The difference is that it has a main combustion chamber and no spark plug is provided in the main combustion chamber, but the operation itself is carried out in substantially the same way, and ignition and explosion of the air-fuel mixture in one sub-combustion chamber is performed. Then, the air-fuel mixture in the other auxiliary combustion chamber is ignited and exploded, and two expansion strokes are performed in one compression stroke.
【００２４】この実施例の火花点火式４サイクルエンジ
ンは、シリンダ２０側に形成された主燃焼室１、シリン
ダヘッド１０に形成された第１副燃焼室２Ａと第２副燃
焼室２Ｂ、主燃焼室１と第１副燃焼室２Ａを連通する連
絡孔４Ａを開閉する第１開閉弁３Ａ、主燃焼室１と第２
副燃焼室２Ｂを連通する連絡孔４Ｂを開閉する第２開閉
弁３Ｂ、及び第１副燃焼室２Ａに設けられた第１スパー
クプラグ６Ａ、及び第２副燃焼室２Ｂに設けられた第２
スパークプラグ６Ｂを有している。図では、吸入空気中
に燃料を噴射して混合気を生成するため、燃料噴射ノズ
ル１４を掃気開閉弁７の上流側の掃気ポート１１に設
け、場合によっては、燃料噴射ノズル１４を主燃焼室１
に設けることができ、或いは、燃料噴射ノズル１４を第
１副燃焼室２Ａと第２副燃焼室２Ｂにそれぞれ設けるこ
ともできる。燃料噴射ノズル１４を掃気ポート１１に設
けた場合には、掃気ポート１１の上流側の吸気通路に燃
料が逆流しないように開閉バルブ２４を設ける。この火
花点火式４サイクルエンジンは、圧縮上死点近傍で第１
開閉弁３Ａの閉鎖状態で第２開閉弁３Ｂを開放して第２
スパークプラグ６Ｂで第２副燃焼室２Ｂ内の混合気を点
火して膨張させ、ピストン９を押し下げて仕事をする。
次いで、次のピストン上死点近傍で第２開閉弁３Ｂの閉
鎖状態で第１開閉弁３Ａを開放して第１スパークプラグ
６Ａで第１副燃焼室２Ａ内の混合気を点火して膨張さ
せ、ピストン９を押し下げて仕事をする。この火花点火
式４サイクルエンジンの具体的な作動の例を次に説明す
る。The spark ignition type four-cycle engine of this embodiment has a main combustion chamber 1 formed on the cylinder 20 side, a first auxiliary combustion chamber 2A and a second auxiliary combustion chamber 2B formed on the cylinder head 10, and a main combustion chamber. A first opening / closing valve 3A for opening / closing a communication hole 4A that connects the chamber 1 and the first auxiliary combustion chamber 2A, a main combustion chamber 1 and a second
A second opening / closing valve 3B for opening and closing a communication hole 4B communicating with the auxiliary combustion chamber 2B, a first spark plug 6A provided in the first auxiliary combustion chamber 2A, and a second spark plug 6A provided in the second auxiliary combustion chamber 2B.
It has a spark plug 6B. In the figure, the fuel injection nozzle 14 is provided in the scavenging port 11 on the upstream side of the scavenging opening / closing valve 7 in order to inject the fuel into the intake air to generate the air-fuel mixture, and in some cases, the fuel injection nozzle 14 is provided in the main combustion chamber. 1
Alternatively, the fuel injection nozzle 14 may be provided in each of the first auxiliary combustion chamber 2A and the second auxiliary combustion chamber 2B. When the fuel injection nozzle 14 is provided in the scavenging port 11, the opening / closing valve 24 is provided so that the fuel does not flow back into the intake passage on the upstream side of the scavenging port 11. This spark ignition type 4-cycle engine has the first
The second opening / closing valve 3B is opened and the second opening / closing valve 3B is opened in the closed state.
The spark plug 6B ignites and expands the air-fuel mixture in the second auxiliary combustion chamber 2B, and pushes down the piston 9 to perform work.
Next, in the vicinity of the next piston top dead center, with the second opening / closing valve 3B closed, the first opening / closing valve 3A is opened and the first spark plug 6A ignites and expands the air-fuel mixture in the first auxiliary combustion chamber 2A. , Push down the piston 9 to work. An example of a specific operation of this spark ignition type 4-cycle engine will be described below.
【００２５】この火花点火式４サイクルエンジンの作動
について、ピストン９の変位に対する第１開閉弁３Ａ、
第２開閉弁３Ｂ、掃気ポート１１、掃気開閉弁７及び排
気弁８の開閉タイミング、及び第１スパークプラグ６Ａ
と第２スパークプラグ６Ｂとの点火タイミングが図８に
示されている。まず、掃気・吸入−圧縮行程では、第１
開閉弁３Ａ、第２開閉弁３Ｂ、排気弁８及び掃気開閉弁
７が開放して燃焼室内の燃焼ガスは排気ポート１２を通
じて排気されると共に燃焼室内に吸入空気が導入され、
ピストン９の上昇によって掃気ポート１１が閉鎖されて
掃気開閉弁７と排気弁８が閉鎖される。そこで、燃焼室
内の吸入空気が圧縮されるが、この時、燃料噴射ノズル
１４から主燃焼室１内に燃料が噴射され、混合気が生成
され、主燃焼室１、第１副燃焼室２Ａ及び第２副燃焼室
２Ｂの圧縮混合気が充満する。ピストン９が圧縮上死点
近傍で第１開閉弁３Ａが閉鎖されると、第２スパークプ
ラグ６Ｂで第２副燃焼室２Ｂ内の混合気を点火して膨張
させ、ピストン９が下降して仕事をする。Regarding the operation of this spark ignition type four-cycle engine, the first opening / closing valve 3A for the displacement of the piston 9
Opening / closing timings of the second opening / closing valve 3B, the scavenging port 11, the scavenging opening / closing valve 7 and the exhaust valve 8, and the first spark plug 6A.
The ignition timings of the second spark plug 6B and the second spark plug 6B are shown in FIG. First, in the scavenging / intake-compression process,
The opening / closing valve 3A, the second opening / closing valve 3B, the exhaust valve 8 and the scavenging opening / closing valve 7 are opened, the combustion gas in the combustion chamber is exhausted through the exhaust port 12, and the intake air is introduced into the combustion chamber.
As the piston 9 rises, the scavenging port 11 is closed and the scavenging opening / closing valve 7 and the exhaust valve 8 are closed. Therefore, the intake air in the combustion chamber is compressed. At this time, fuel is injected from the fuel injection nozzle 14 into the main combustion chamber 1 to generate an air-fuel mixture, and the main combustion chamber 1, the first auxiliary combustion chamber 2A and The compressed air-fuel mixture in the second auxiliary combustion chamber 2B is filled. When the first opening / closing valve 3A is closed near the compression top dead center of the piston 9, the second spark plug 6B ignites and expands the air-fuel mixture in the second auxiliary combustion chamber 2B, causing the piston 9 to descend and work. do.
【００２６】ピストン９が下降して下死点近傍になって
掃気ポート１１は開口するが、掃気開閉弁７は閉鎖して
いるので、吸入空気が燃焼室へ導入されない。そこで、
排気弁８が開放してピストン９の上昇に応じて第２副燃
焼室２Ｂと主燃焼室１内の燃焼ガスが排気ポート１２を
通じて外部に排出される。ピストン９が上死点近傍に来
ると、第２開閉弁３Ｂが閉鎖して第１開閉弁３Ａが開放
し、第１スパークプラグ６Ａで第１副燃焼室２Ａ内の混
合気を点火して膨張させ、ピストン９が下降して仕事を
する。ピストン９が下死点近傍に到達する時点で掃気ポ
ート１１が開放し、掃気開閉弁７が開放すると共に、排
気弁８が開放する。ピストン９は下死点から上死点へ変
位すると共に、第１副燃焼室２Ａと主燃焼室１内の燃焼
ガスは排気ポート１２を通じて筒内から外部へ排気され
る。ピストン９の上昇によって掃気ポート１１が閉鎖す
ると共に掃気開閉弁７が閉鎖する。次いで、第２開閉弁
３Ｂが開放すると共に排気弁８が閉鎖して燃焼室内の吸
入空気が圧縮され、燃料噴射ノズル１４から燃料が主燃
焼室１内に噴射され、燃焼室内に混合気が生成される。
この火花点火式４サイクルエンジンは、これによって１
つのサイクルが完結されることになり、これらのサイク
ルを繰り返して駆動されることになる。The scavenging port 11 opens while the piston 9 descends to the vicinity of the bottom dead center, but the scavenging opening / closing valve 7 is closed, so intake air is not introduced into the combustion chamber. Therefore,
The exhaust valve 8 is opened and the combustion gas in the second auxiliary combustion chamber 2B and the main combustion chamber 1 is discharged to the outside through the exhaust port 12 in response to the rise of the piston 9. When the piston 9 comes near the top dead center, the second opening / closing valve 3B closes and the first opening / closing valve 3A opens, and the first spark plug 6A ignites the air-fuel mixture in the first auxiliary combustion chamber 2A and expands it. Then, the piston 9 descends to work. When the piston 9 reaches the vicinity of the bottom dead center, the scavenging port 11 opens, the scavenging opening / closing valve 7 opens, and the exhaust valve 8 opens. The piston 9 is displaced from the bottom dead center to the top dead center, and the combustion gas in the first auxiliary combustion chamber 2A and the main combustion chamber 1 is exhausted from the inside of the cylinder through the exhaust port 12 to the outside. As the piston 9 rises, the scavenging port 11 is closed and the scavenging opening / closing valve 7 is closed. Next, the second on-off valve 3B is opened, the exhaust valve 8 is closed, the intake air in the combustion chamber is compressed, the fuel is injected from the fuel injection nozzle 14 into the main combustion chamber 1, and the air-fuel mixture is generated in the combustion chamber. To be done.
This spark-ignition 4-cycle engine
One cycle will be completed, and it will be driven by repeating these cycles.
【００２７】[0027]
【発明の効果】この発明による副燃焼室を持つ４サイク
ルエンジンは、上記のように構成されており、次のよう
な効果を有する。この４サイクルエンジンは、主燃焼室
と副燃焼室を連通する連絡孔を開閉する副室開閉弁の閉
鎖状態における圧縮上死点近傍で主室スパークプラグで
前記主燃焼室内の混合気を点火して膨張させ、次のピス
トン上死点近傍で前記副室開閉弁の開放状態における副
室スパークプラグで前記副燃焼室内の混合気を点火して
膨張させる。或いは、この火花点火式４サイクルエンジ
ンは、シリンダヘッドに第１副燃焼室と第２副燃焼室を
設け、前記第１副燃焼室の第１開閉弁の閉鎖状態で前記
第２副燃焼室の第２開閉弁を開放した圧縮上死点近傍で
前記第２副燃焼室を設けた第２スパークプラグで混合気
を点火して膨張させ、次のピストン上死点近傍で前記第
２開閉弁の閉鎖状態で前記第１開閉弁を開放して前記第
１副燃焼室の第１スパークプラグで混合気を点火して膨
張させる。従って、この４サイクルエンジンは、前記主
燃焼室又は前記副燃焼室に存在する圧縮された混合気、
或いは第１副燃焼室又は第２副燃焼室及び前記主燃焼室
に存在する圧縮された混合気を経時的にそれぞれ独立し
てスパークプラグで点火して膨張させることができ、一
回の圧縮行程で二回の膨張行程を行うことができ、圧縮
比に対して膨張比を大きくすることができ、理論熱効率
を大幅に向上させることができる。この副燃焼室を持つ
４サイクルエンジンをディーゼルエンジンに構成した場
合にも、一回の圧縮行程で二回の膨張行程を行うことが
でき、圧縮比に対して膨張比を大きくすることができ、
理論熱効率を大幅に向上させることができる。The four-cycle engine having the auxiliary combustion chamber according to the present invention is constructed as described above and has the following effects. In this four-cycle engine, the air-fuel mixture in the main combustion chamber is ignited by the main chamber spark plug in the vicinity of the compression top dead center in the closed state of the auxiliary chamber opening / closing valve that opens and closes the communication hole that connects the main combustion chamber and the auxiliary combustion chamber. Then, the mixture gas in the sub combustion chamber is ignited and expanded by the sub chamber spark plug in the opened state of the sub chamber opening / closing valve near the next piston top dead center. Alternatively, in this spark ignition type four-cycle engine, a cylinder head is provided with a first sub-combustion chamber and a second sub-combustion chamber, and the second sub-combustion chamber is closed when the first opening / closing valve of the first sub-combustion chamber is closed. The air-fuel mixture is ignited and expanded by the second spark plug provided with the second auxiliary combustion chamber in the vicinity of the compression top dead center where the second on-off valve is opened, and the second piston of the second on-off valve is expanded near the next piston top dead center. In the closed state, the first opening / closing valve is opened, and the air-fuel mixture is ignited and expanded by the first spark plug of the first auxiliary combustion chamber. Therefore, this four-cycle engine uses a compressed air-fuel mixture existing in the main combustion chamber or the auxiliary combustion chamber,
Alternatively, the compressed air-fuel mixture existing in the first sub-combustion chamber or the second sub-combustion chamber and the main combustion chamber can be independently ignited and expanded by the spark plug over time, and a single compression stroke The expansion stroke can be performed twice, the expansion ratio can be increased with respect to the compression ratio, and the theoretical thermal efficiency can be significantly improved. Even when a 4-cycle engine having this auxiliary combustion chamber is configured as a diesel engine, it is possible to perform two expansion strokes in one compression stroke, and to increase the expansion ratio with respect to the compression ratio.
The theoretical thermal efficiency can be greatly improved.
【００２８】即ち、この４サイクルエンジンでは、膨張
比は圧縮比の最大２倍になるため、圧縮比を低く設定し
ても所定の膨張比を確保できると共に、高過給が可能に
なり、吸気行程即ち掃気行程がエンジン２回転で１回で
あるため、通常の４ストロークエンジンと同等のエンジ
ン２回転で１回の吸入回数であるにもかかわらず、エン
ジン２回転で２回の膨張行程を行うことができ、２サイ
クルの作動と同等以上の容積に対する出力（出力／エン
ジン容積）を得ることができる。また、この４サイクル
作動は、通常の２サイクル作動に比較して回転当たりの
吸入回数が減少するが、ノッキングの発生を考慮するこ
となく、高過給或いは多量の吸入空気を導入が可能にな
り、エンジンの大きさに比較して大幅に高出力化が可能
になる。この火花点火式４サイクルエンジンは、圧縮比
を低く設定できるので、筒内最高圧力を低く設定できる
ので、エンジン構造に高強度の構造が必要なくなり、製
造コストを低減できる。また、予混合燃焼にかかわら
ず、ディーゼルエンジンと同等、或いはそれ以上の熱効
率を得ることができ、特に、予混合燃焼を用いた場合
は、スートの生成がない。また、この火花点火式４サイ
クルエンジンは、当量比１近くの燃焼であるため、三元
触媒を使用でき、ＮＯX ，ＨＣ，ＳＯX 等の発生を抑制
でき、低公害エンジンを提供できる。That is, in this four-cycle engine, the expansion ratio is up to twice the compression ratio, so that even if the compression ratio is set low, a predetermined expansion ratio can be ensured, and high supercharging is possible, and intake air intake Since the stroke, that is, the scavenging stroke, is once in two revolutions of the engine, the expansion stroke is performed twice in two revolutions of the engine even though the number of intakes is one in two revolutions of the engine, which is equivalent to that of a normal four-stroke engine. Therefore, it is possible to obtain an output (output / engine volume) for a volume equal to or higher than the operation of two cycles. Further, in this 4-cycle operation, the number of intakes per rotation is reduced as compared with the normal 2-cycle operation, but it is possible to introduce high supercharging or a large amount of intake air without considering the occurrence of knocking. The output can be significantly increased compared to the size of the engine. In this spark ignition type 4-cycle engine, since the compression ratio can be set low, the maximum cylinder pressure can be set low, so that the engine structure does not need a high-strength structure, and the manufacturing cost can be reduced. Further, regardless of the premixed combustion, it is possible to obtain the thermal efficiency equal to or higher than that of the diesel engine, and particularly when the premixed combustion is used, soot is not generated. Further, the spark-ignition type 4-cycle engine, since the equivalence ratio 1 is close to the combustion, can use three-way catalyst, NO X, HC, it is possible to suppress the generation of such SO X, can provide a low-emission engine.
【図１】この発明による副燃焼室を持つ４サイクルエン
ジンの一実施例を示すシリンダヘッド下面の平面図であ
る。FIG. 1 is a plan view of a lower surface of a cylinder head showing an embodiment of a 4-cycle engine having a sub combustion chamber according to the present invention.
【図２】図１の線Ａ−Ａにおける断面図である。FIG. 2 is a cross-sectional view taken along line AA of FIG.
【図３】図１の線Ｂ−Ｂにおける断面図である。FIG. 3 is a sectional view taken along line BB in FIG. 1;
【図４】図１の副燃焼室を持つ４サイクルエンジンの作
動タイミングを示す線図である。FIG. 4 is a diagram showing an operation timing of a 4-cycle engine having the auxiliary combustion chamber of FIG.
【図５】この発明による副燃焼室を持つ４サイクルエン
ジンの別の実施例を示すシリンダヘッド下面の平面図で
ある。FIG. 5 is a plan view of the lower surface of the cylinder head showing another embodiment of the 4-cycle engine having the auxiliary combustion chamber according to the present invention.
【図６】図５の線Ｃ−Ｃにおける断面図である。6 is a cross-sectional view taken along the line CC of FIG.
【図７】図５の線Ｄ−Ｄにおける断面図である。7 is a cross-sectional view taken along the line DD of FIG.
【図８】図５の副燃焼室を持つ４サイクルエンジンの作
動タイミングを示す線図である。8 is a diagram showing an operation timing of a 4-cycle engine having the auxiliary combustion chamber of FIG.
１ 主燃焼室 ２ 副燃焼室 ２Ａ 第１副燃焼室 ２Ｂ 第２副燃焼室 ３ 副室開閉弁 ３Ａ 第１開閉弁 ３Ｂ 第２開閉弁 ４ 連絡孔 ５ 主室スパークプラグ ６ 副室スパークプラグ ６Ａ 第１スパークプラグ ６Ｂ 第２スパークプラグ ７ 掃気開閉弁 ８ 排気弁 ９ ピストン １０ シリンダヘッド １１ 掃気ポート １２ 排気ポート １４ 燃料噴射ノズル ２０ シリンダ 1 Main Combustion Chamber 2 Sub Combustion Chamber 2A First Sub Combustion Chamber 2B Second Sub Combustion Chamber 3 Sub Chamber Opening Valve 3A First Opening Valve 3B Second Opening Valve 4 Communication Hole 5 Main Chamber Spark Plug 6 Sub Chamber Spark Plug 6A No. 1 Spark plug 6B 2nd spark plug 7 Scavenging opening / closing valve 8 Exhaust valve 9 Piston 10 Cylinder head 11 Scavenging port 12 Exhaust port 14 Fuel injection nozzle 20 Cylinder
Claims (4)
ンダヘッドに形成された副燃焼室、前記主燃焼室と前記
副燃焼室を連通する連絡孔を開閉する副室開閉弁、シリ
ンダ下部に設けた掃気ポートに設けた掃気開閉弁、前記
主燃焼室に設けられた主室スパークプラグ、前記副燃焼
室に設けられた副室スパークプラグ、及び混合気を生成
するため吸入空気中に燃料を噴射する燃料噴射ノズルを
有し、掃気行程で前記掃気開閉弁を開放して前記シリン
ダ内に空気を吸入すると共に排気弁が閉鎖した時点で前
記燃料噴射ノズルから燃料を吸入空気中に噴射して混合
気を生成し、次いで混合気を前記副室開閉弁の開放状態
で圧縮し、圧縮上死点近傍で前記副室開閉弁を閉鎖して
前記主室スパークプラグで前記主燃焼室内の混合気を点
火して膨張させ、膨張行程終端付近で前記排気弁を開放
して前記主燃焼室内の燃焼ガスを排気し、排気行程のピ
ストン上死点近傍で前記副室開閉弁を開放すると共に、
前記副室スパークプラグで前記副燃焼室内の混合気を点
火して膨張させ、次いで膨張行程終端付近で前記排気弁
を開放すると共に前記掃気開閉弁を開放して掃気するサ
イクルを繰り返して駆動されることを特徴とする副燃焼
室を持つ４サイクルエンジン。1. A main combustion chamber formed on the cylinder side, a sub combustion chamber formed in a cylinder head, a sub chamber opening / closing valve for opening and closing a communication hole that connects the main combustion chamber and the sub combustion chamber, and a lower portion of the cylinder. A scavenging opening / closing valve provided in the provided scavenging port, a main chamber spark plug provided in the main combustion chamber, a sub chamber spark plug provided in the sub combustion chamber, and fuel in intake air for generating a mixture. Has a fuel injection nozzle for injecting, and in the scavenging stroke, the scavenging opening / closing valve is opened to suck air into the cylinder, and when the exhaust valve is closed, the fuel is injected from the fuel injection nozzle into the intake air. The air-fuel mixture is generated, then the air-fuel mixture is compressed with the sub-chamber opening / closing valve opened, the sub-chamber opening / closing valve is closed near the compression top dead center, and the air-fuel mixture in the main combustion chamber is closed by the main chamber spark plug. Ignite and inflate The exhaust valve is opened near the end of the stretching stroke to exhaust the combustion gas in the main combustion chamber, and the auxiliary chamber opening / closing valve is opened near the piston top dead center in the exhaust stroke,
It is driven by repeating a cycle of igniting and expanding the air-fuel mixture in the auxiliary combustion chamber with the auxiliary chamber spark plug, and then opening the exhaust valve near the end of the expansion stroke and opening the scavenging opening / closing valve and scavenging. A 4-cycle engine with a secondary combustion chamber characterized by
ンダヘッドに形成された第１副燃焼室と第２副燃焼室、
前記主燃焼室と前記第１副燃焼室を連通する連絡孔を開
閉する第１開閉弁、前記主燃焼室と前記第２副燃焼室を
連通する連絡孔を開閉する第２開閉弁、前記第１副燃焼
室に設けられた第１スパークプラグ、前記第２副燃焼室
に設けられた第２スパークプラグ、及び混合気を生成す
るため吸入空気中に燃料を噴射する燃料噴射ノズルを有
し、掃気行程で前記掃気開閉弁を開放して前記シリンダ
内に空気を吸入すると共に排気弁が閉鎖した時点で前記
燃料噴射ノズルから燃料を吸入空気中に噴射して混合気
を生成し、次いで混合気を前記第１開閉弁と前記第２開
閉弁との開放状態で圧縮し、ピストン上死点近傍で前記
第１開閉弁を閉鎖して前記第２スパークプラグで前記第
２副燃焼室内の混合気を点火して膨張させ、膨張行程終
端付近で排気弁を開放して筒内の燃焼ガスを排気し、排
気行程のピストン上死点近傍で前記２開閉弁を閉鎖して
前記第１開閉弁を開放すると同時に前記第１スパークプ
ラグで前記第１副燃焼室内の混合気を点火して膨張さ
せ、次いで膨張行程終端付近で前記排気弁を開放すると
共に前記掃気開閉弁を開放して筒内の燃焼ガスを掃気す
るサイクルを繰り返して駆動されることを特徴とする副
燃焼室を持つ４サイクルエンジン。2. A main combustion chamber formed on the cylinder side, a first auxiliary combustion chamber and a second auxiliary combustion chamber formed on the cylinder head,
A first on-off valve that opens and closes a communication hole that communicates the main combustion chamber and the first auxiliary combustion chamber, a second on-off valve that opens and closes a communication hole that communicates the main combustion chamber and the second auxiliary combustion chamber, and 1 has a first spark plug provided in the sub-combustion chamber, a second spark plug provided in the second sub-combustion chamber, and a fuel injection nozzle for injecting fuel into intake air to generate an air-fuel mixture, In the scavenging stroke, the scavenging opening / closing valve is opened to suck air into the cylinder, and at the time when the exhaust valve is closed, the fuel is injected from the fuel injection nozzle into the intake air to generate the air-fuel mixture, and then the air-fuel mixture is mixed. Is compressed in the open state of the first on-off valve and the second on-off valve, the first on-off valve is closed near the top dead center of the piston, and the mixture gas in the second auxiliary combustion chamber is closed by the second spark plug. Ignite the valve to expand it, and close the exhaust valve near the end of the expansion stroke. The combustion gas in the cylinder is discharged to release the second opening / closing valve and the first opening / closing valve are opened near the piston top dead center in the exhaust stroke, and at the same time, the first spark plug is used to open the inside of the first auxiliary combustion chamber. It is characterized in that it is driven by repeating a cycle of igniting an air-fuel mixture to expand it, then opening the exhaust valve near the end of the expansion stroke and opening the scavenging opening / closing valve to scavenging the combustion gas in the cylinder. A 4-cycle engine with a secondary combustion chamber.
ンダヘッドに形成された副燃焼室、前記主燃焼室と前記
副燃焼室を連通する連絡孔を開閉する副室開閉弁、シリ
ンダ下部に設けた掃気ポートに設けた掃気開閉弁、前記
主燃焼室に設けられた主室燃料噴射ノズル、及び前記副
燃焼室に設けられた副室燃料噴射ノズルを有し、圧縮上
死点近傍で前記副室開閉弁を閉鎖して前記主室燃料噴射
ノズルで前記主燃焼室に燃料を噴射して着火燃焼させて
膨張させ、膨張行程終端付近で前記副室開閉弁を開放し
て前記副室燃料噴射ノズルで前記副燃焼室に燃料を噴射
して着火燃焼させて膨張させることを特徴とする副燃焼
室を持つ４サイクルエンジン。3. A main combustion chamber formed on the cylinder side, a sub combustion chamber formed on the cylinder head, a sub chamber opening / closing valve for opening and closing a communication hole that connects the main combustion chamber and the sub combustion chamber, and a cylinder lower portion. A scavenging opening / closing valve provided in a provided scavenging port, a main chamber fuel injection nozzle provided in the main combustion chamber, and a sub chamber fuel injection nozzle provided in the sub combustion chamber, and the scavenging valve near the compression top dead center The sub-chamber on-off valve is closed, fuel is injected into the main combustion chamber by the main-chamber fuel injection nozzle to ignite and burn to expand, and the sub-chamber on-off valve is opened near the end of the expansion stroke to open the sub-chamber fuel. A four-cycle engine having a sub-combustion chamber, characterized in that fuel is injected into the sub-combustion chamber by an injection nozzle to ignite, burn and expand.
ンダヘッドに形成された第１副燃焼室と第２副燃焼室、
前記主燃焼室と前記第１副燃焼室を連通する連絡孔を開
閉する第１開閉弁、前記主燃焼室と前記第２副燃焼室を
連通する連絡孔を開閉する第２開閉弁、前記第１副燃焼
室に設けられた第１燃料噴射ノズル、及び前記第２副燃
焼室に設けられた第２燃料噴射ノズルを有し、前記第１
開閉弁の閉鎖状態で前記第２開閉弁を開放した圧縮上死
点近傍で前記第２燃料噴射ノズルで前記第２副燃焼室に
燃料を噴射して着火燃焼させて膨張させ、排気行程のピ
ストン上死点近傍で前記第２開閉弁の閉鎖状態で前記第
１開閉弁を開放して前記第１燃料噴射ノズルで前記第１
副燃焼室に燃料を噴射して着火燃焼させて膨張させるこ
とを特徴とする副燃焼室を持つ４サイクルエンジン。4. A main combustion chamber formed on the cylinder side, a first auxiliary combustion chamber and a second auxiliary combustion chamber formed on the cylinder head,
A first on-off valve that opens and closes a communication hole that communicates the main combustion chamber and the first auxiliary combustion chamber, a second on-off valve that opens and closes a communication hole that communicates the main combustion chamber and the second auxiliary combustion chamber, and A first fuel injection nozzle provided in the first auxiliary combustion chamber and a second fuel injection nozzle provided in the second auxiliary combustion chamber;
In the vicinity of the compression top dead center where the second opening / closing valve is opened in the closed state of the opening / closing valve, the second fuel injection nozzle injects fuel into the second sub-combustion chamber to ignite, burn, and expand the piston in the exhaust stroke. The first opening / closing valve is opened in the closed state of the second opening / closing valve near the top dead center and the first fuel injection nozzle is used to open the first opening / closing valve.
A four-cycle engine having a sub-combustion chamber, which is characterized in that fuel is injected into the sub-combustion chamber, ignited and burned to expand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7176953A JPH094459A (en) | 1995-06-21 | 1995-06-21 | 4-cycle engine with auxiliary combustion chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7176953A JPH094459A (en) | 1995-06-21 | 1995-06-21 | 4-cycle engine with auxiliary combustion chamber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH094459A true JPH094459A (en) | 1997-01-07 |
Family
ID=16022614
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7176953A Pending JPH094459A (en) | 1995-06-21 | 1995-06-21 | 4-cycle engine with auxiliary combustion chamber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH094459A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1051476C (en) * | 1994-07-11 | 2000-04-19 | 三菱重工业株式会社 | Method for controlling the oxidation of sulfites |
| US6622690B2 (en) | 2000-06-08 | 2003-09-23 | Mitsubishi Jidosha Kogyo Kabushiki Kaisha | Direct injection type internal combustion engine and controlling method therefor |
| KR101302254B1 (en) * | 2007-03-08 | 2013-09-02 | 바르실라 핀랜드 오이 | Improved two-stroke engine |
| CN108590871A (en) * | 2018-05-29 | 2018-09-28 | 重庆隆鑫发动机有限公司 | The cylinder head and aero-engine of heavy fuel burning engine |
| CN109555594A (en) * | 2019-01-04 | 2019-04-02 | 吉林大学 | Sequence insertion type compound combustion system overpower density diesel engine |
| IT201800004821A1 (en) * | 2018-04-24 | 2019-10-24 | HIGH PERFORMANCE INTERNAL COMBUSTION ENGINE WITH IMPROVED EMISSION MANAGEMENT AND METHOD OF CONTROL OF THIS ENGINE | |
| CN119102866A (en) * | 2024-09-30 | 2024-12-10 | 广西玉柴机器股份有限公司 | A dual spark plug pre-combustion chamber gas engine combustion system and control method |
| CN119353092A (en) * | 2024-10-23 | 2025-01-24 | 天津大学 | Two or four stroke variable engine |
-
1995
- 1995-06-21 JP JP7176953A patent/JPH094459A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1051476C (en) * | 1994-07-11 | 2000-04-19 | 三菱重工业株式会社 | Method for controlling the oxidation of sulfites |
| US6622690B2 (en) | 2000-06-08 | 2003-09-23 | Mitsubishi Jidosha Kogyo Kabushiki Kaisha | Direct injection type internal combustion engine and controlling method therefor |
| DE10127951B4 (en) * | 2000-06-08 | 2011-02-24 | Mitsubishi Jidosha Kogyo K.K. | Direct injection internal combustion engine and control method therefor |
| KR101302254B1 (en) * | 2007-03-08 | 2013-09-02 | 바르실라 핀랜드 오이 | Improved two-stroke engine |
| IT201800004821A1 (en) * | 2018-04-24 | 2019-10-24 | HIGH PERFORMANCE INTERNAL COMBUSTION ENGINE WITH IMPROVED EMISSION MANAGEMENT AND METHOD OF CONTROL OF THIS ENGINE | |
| EP3561255A1 (en) * | 2018-04-24 | 2019-10-30 | FERRARI S.p.A. | High-performance internal combustion engine with improved hanlding of emissions and method for controlling such engine |
| US11891945B2 (en) | 2018-04-24 | 2024-02-06 | Ferrari S.P.A. | High-performance internal combustion engine with improved handling of emission and method of controlling such engine |
| CN108590871A (en) * | 2018-05-29 | 2018-09-28 | 重庆隆鑫发动机有限公司 | The cylinder head and aero-engine of heavy fuel burning engine |
| CN109555594A (en) * | 2019-01-04 | 2019-04-02 | 吉林大学 | Sequence insertion type compound combustion system overpower density diesel engine |
| CN119102866A (en) * | 2024-09-30 | 2024-12-10 | 广西玉柴机器股份有限公司 | A dual spark plug pre-combustion chamber gas engine combustion system and control method |
| CN119353092A (en) * | 2024-10-23 | 2025-01-24 | 天津大学 | Two or four stroke variable engine |
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