JPS61182416A - Subchamber type combustion chamber - Google Patents

Subchamber type combustion chamber

Info

Publication number
JPS61182416A
JPS61182416A JP60022370A JP2237085A JPS61182416A JP S61182416 A JPS61182416 A JP S61182416A JP 60022370 A JP60022370 A JP 60022370A JP 2237085 A JP2237085 A JP 2237085A JP S61182416 A JPS61182416 A JP S61182416A
Authority
JP
Japan
Prior art keywords
chamber
subchamber
valve
opening
auxiliary chamber
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
Application number
JP60022370A
Other languages
Japanese (ja)
Inventor
Koichi Nakanishi
功一 中西
Teruo Tojo
東條　輝夫
Yuji Takami
高見　裕二
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Motors Corp
Original Assignee
Mitsubishi Motors Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Motors Corp filed Critical Mitsubishi Motors Corp
Priority to JP60022370A priority Critical patent/JPS61182416A/en
Publication of JPS61182416A publication Critical patent/JPS61182416A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B19/00—Engines characterised by precombustion chambers
    • F02B19/14—Engines characterised by precombustion chambers with compression ignition
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D15/00—Varying compression ratio
    • F02D15/04—Varying compression ratio by alteration of volume of compression space without changing piston stroke
    • 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

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion Methods Of Internal-Combustion Engines (AREA)

Abstract

PURPOSE:To facilitate the cold start and improve the exhaust gas situation and performances in stationary operation by installing an auxiliary chamber which communicates to a subchamber and installing an opening/closing valve for opening and closing the auxiliary chamber to the subchamber. CONSTITUTION:A main combustion chamber 5 in concaved form is formed at the head part of a piston 4, and a valve 6 and a sub-chamber 7 are installed onto a cylinder head 1. A cup-shaped mouth ring 8 is closely fitted onto the cylindrical lower part of the subchamber 7, and an injection port 8a which communicates to the both chambers 5 and 7 is drilled onto the bottom part of the mouth ring 8. In the semispherical upper part of the subchamber 7, an auxiliary chamber 13 is formed besides the holes 10 and 12 for fitting a glow plug 9 and a fuel injection valve 11. Said auxiliary chamber 13 is allowed to communicate to the subchamber 7 through a communication port 13a, and an opening/closing valve 14 is installed into the communication port 13a. Therefore, the prescribed purpose can be achieved by opening the opening/closing valve 14 on cold start and by closing the valve 14 in stationary operation.

Description

【発明の詳細な説明】 本発明は、ディーゼルエンジンに好適な副室式燃焼室、
より詳細には副室内容積を可変自在に構成した副室式燃
焼室に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention provides a pre-chamber type combustion chamber suitable for a diesel engine;
More specifically, the present invention relates to a pre-chamber type combustion chamber in which the pre-chamber internal volume is configured to be variable.

ディーゼルエンジンの燃焼室には、噴射燃料が直接ピス
トン頭部へ向かって散布される直接噴射式の他に、一旦
別に設けた副室内に燃料を噴射しこれを着火させ、ここ
で発生した燃焼ガスをピストン頭部へ向かって噴出させ
る副室式がある。ところで副室式燃焼室に入り込む空気
は、連絡通路の絞り効果のための熱損失があって温度降
下するため着火し易いようにグロープラグを設けである
。In addition to the direct injection type in which the injected fuel is sprayed directly toward the piston head, the combustion chamber of a diesel engine also has the direct injection type, in which fuel is injected into a separate pre-chamber and ignited, and the combustion gas generated here is There is a sub-chamber type in which the liquid is ejected towards the piston head. By the way, the air entering the auxiliary combustion chamber loses heat due to the throttling effect of the communication passage and its temperature drops, so a glow plug is provided to facilitate ignition.

しかし、それでも冷寒時の始動は困難であるので、圧縮
比は高く設定しておくのが一般である。ところが、定常
運転時においても高圧縮比を維持させられていると、Ｎ
ｏｘ、パティキュレートＰｃｔの発生が大きくなり、燃
費や出力などの性能の面でも不利であるという問題があ
る。However, starting in cold weather is still difficult, so the compression ratio is generally set high. However, if a high compression ratio is maintained even during steady operation, the N
There is a problem in that the generation of ox and particulates Pct increases, which is disadvantageous in terms of performance such as fuel efficiency and output.

本発明は、従来の副室式燃焼室がこのような問題を有し
ていることに鑑みて成されたものであって、目的とする
ところは、冷寒時の起動が容易でかつ定常運転時の排ガ
ス状況や性能を良好にする副室式燃焼室を提供すること
にある。The present invention was made in view of the above-mentioned problems of the conventional pre-combustion chamber, and aims to facilitate startup in cold weather and to maintain steady operation. The purpose of the present invention is to provide a pre-chamber type combustion chamber that improves the exhaust gas condition and performance at the time of use.

この目的を達成するために、本発明は副室に連通ずる補
助室を設け、冷寒時起動の際は副室と補助室との連通を
遮断し、定常運転時には副室と補助室とを連通させるよ
うに構成したことを特徴とする。In order to achieve this objective, the present invention provides an auxiliary chamber that communicates with the auxiliary chamber, cuts off communication between the auxiliary chamber and the auxiliary chamber during startup in cold weather, and closes the communication between the auxiliary chamber and the auxiliary chamber during normal operation. It is characterized by being configured to communicate with each other.

以下１図示の実施例につき詳細に説明する。図において
、符号１はシリンダヘッドを示し、シリンダヘッド１は
ガスケット２を介してシリンダ３に固定されている。シ
リンダ３にはピストン４が摺動自在に支持されており、
ピストン４の頭部には凹状の主燃焼室５が形成されてい
る。シリンダヘッド１にはバルブ６（１個のみ示す）お
よび副室７が設けられている。副室７は半球状の上部と
円筒状の下部とから成り、円筒状下部にはコツプ状の口
金８が密嵌されている。口金８の底部には主燃焼室５と
副室７とを連通させる噴口８ａが穿設されている。半球
状上部にはグロープラグ９を装着するための孔１０及び
燃料噴射弁１１を装着するための孔１２の他に、補助室
１３が穿設されている。補助室１３は連通口１３ａを介
して副室７に連通可能になっている。連通口１３ａは略
噴口８ａの延長上に位置させられていることがエヤーセ
ルの機能を果すことができるのでのぞましい。連通口１
３ａを開閉するために開閉弁１４が設けられている。開
閉弁１４は、算盤味のような形状の弁部を有し、ステム
１４ａを副室７へ向けて押下げれば連通口１３ａを遮閉
させ、逆方向へ挙上すれば連通口１３ａは開放されると
ともに、ステムガイドＩ５の間隙を密封するようになっ
ている。補助室Ｉ３の容積は、例えば連通口１３ａが遮
閉されるときの圧縮比を２２とすれば、連通口１３ａが
開放されたとき圧縮比が１８になるような程度であれば
よいが、これは実験によって最適値が決定されよう。One illustrated embodiment will be described in detail below. In the figure, reference numeral 1 indicates a cylinder head, and the cylinder head 1 is fixed to a cylinder 3 via a gasket 2. A piston 4 is slidably supported in the cylinder 3.
A concave main combustion chamber 5 is formed in the head of the piston 4. The cylinder head 1 is provided with a valve 6 (only one shown) and an auxiliary chamber 7. The sub-chamber 7 consists of a hemispherical upper part and a cylindrical lower part, and a socket-shaped base 8 is tightly fitted into the cylindrical lower part. A nozzle 8a is bored in the bottom of the mouthpiece 8 to communicate the main combustion chamber 5 and the sub-chamber 7. In addition to a hole 10 for mounting the glow plug 9 and a hole 12 for mounting the fuel injection valve 11, an auxiliary chamber 13 is bored in the hemispherical upper part. The auxiliary chamber 13 can communicate with the auxiliary chamber 7 via the communication port 13a. It is preferable that the communication port 13a is positioned substantially on an extension of the jet port 8a, since this allows it to function as an air cell. Communication port 1
An on-off valve 14 is provided to open and close 3a. The on-off valve 14 has a valve portion shaped like an abacus, and when the stem 14a is pushed down toward the subchamber 7, the communication port 13a is closed, and when the stem 14a is lifted in the opposite direction, the communication port 13a is opened. At the same time, the gap between the stem guide I5 is sealed. The volume of the auxiliary chamber I3 may be such that, for example, if the compression ratio when the communication port 13a is closed is 22, the compression ratio is 18 when the communication port 13a is opened. The optimum value will be determined by experiment.

以上のような構成であるから、冷寒時に起動する際開閉
弁１４を押下して連通口１３ａを遮閉させると、圧縮比
が高くなって始動性が向上しノック音も低下するから、
バッテリの消耗が少なく騒音も減少する一方、始動後エ
ンジンの水温、油温が適温になったことを確かめてから
開閉弁１４を挙上して連通口１３ａを開放させると、圧
縮比が下がり、Ｎｏｘが低減し、スモークが減少し、燃
費が向上しシリンダ内最高圧力Ｐｍａｘが低下するので
、公害の発生を防止しエンジンの性能および耐久性を向
上させることができる。With the above configuration, when starting in cold weather, if the on-off valve 14 is pressed down to close the communication port 13a, the compression ratio will be increased, the startability will be improved, and the knocking noise will be reduced.
While battery consumption is low and noise is reduced, if the on-off valve 14 is lifted to open the communication port 13a after confirming that the water and oil temperatures of the engine are at the appropriate temperature after starting, the compression ratio is reduced. Since NOx is reduced, smoke is reduced, fuel efficiency is improved, and the cylinder maximum pressure Pmax is reduced, it is possible to prevent the occurrence of pollution and improve the performance and durability of the engine.

従って、本発明は冷寒時起動が容易でかつ定常運転時の
排ガス状況や性能を向上できる効果を有するものである
。Therefore, the present invention has the effect of making it easy to start up in cold weather and improving the exhaust gas condition and performance during steady operation.

【図面の簡単な説明】[Brief explanation of the drawing]

図は本発明の一実施例を示す一部断面図である。 １・・・シリンダヘッド、４・・・ピストン、７・・・
副室、１３・・・補助室、１３ａ・・・連通口、１４・
−・開閉弁。The figure is a partially sectional view showing an embodiment of the present invention. 1... Cylinder head, 4... Piston, 7...
Auxiliary room, 13...Auxiliary room, 13a...Communication port, 14.
-・On-off valve.

Claims (1)

【特許請求の範囲】[Claims] 噴射された燃料が着火して発生した燃焼ガスがピストン
頭部へ噴出させられる副室を有する副室式燃焼室におい
て、副室に連通可能な補助室と、この補助室を副室に対
して開閉する開閉弁とを備えたことを特徴とする副室式
燃焼室。In a sub-chamber type combustion chamber that has a sub-chamber in which the injected fuel ignites and the combustion gas generated is ejected to the piston head, there is an auxiliary chamber that can communicate with the sub-chamber, and this auxiliary chamber is connected to the sub-chamber. A pre-chamber type combustion chamber characterized by being equipped with an on-off valve that opens and closes.
JP60022370A 1985-02-07 1985-02-07 Subchamber type combustion chamber Pending JPS61182416A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60022370A JPS61182416A (en) 1985-02-07 1985-02-07 Subchamber type combustion chamber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60022370A JPS61182416A (en) 1985-02-07 1985-02-07 Subchamber type combustion chamber

Publications (1)

Publication Number Publication Date
JPS61182416A true JPS61182416A (en) 1986-08-15

Family

ID=12080744

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60022370A Pending JPS61182416A (en) 1985-02-07 1985-02-07 Subchamber type combustion chamber

Country Status (1)

Country Link
JP (1) JPS61182416A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1304749C (en) * 2004-01-16 2007-03-14 大连理工大学 Collision spray vortex chamber of internal combustion engine
CN1316154C (en) * 2004-03-18 2007-05-16 大连理工大学 Igniting combustion system of engine preburning chamber
CN107091145A (en) * 2017-06-07 2017-08-25 哈尔滨工程大学 A kind of precombustion chamber of marine large-diameter gas engine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1304749C (en) * 2004-01-16 2007-03-14 大连理工大学 Collision spray vortex chamber of internal combustion engine
CN1316154C (en) * 2004-03-18 2007-05-16 大连理工大学 Igniting combustion system of engine preburning chamber
CN107091145A (en) * 2017-06-07 2017-08-25 哈尔滨工程大学 A kind of precombustion chamber of marine large-diameter gas engine

Similar Documents

Publication Publication Date Title
US4193382A (en) Stratified charge type combustion process for internal combustion engine and internal combustion engine utilizing same
US4223645A (en) Combustion chamber of an internal combustion engine
JP3756995B2 (en) Combustion gas supply method and structure for gas engine
US5477822A (en) Spark ignition engine with cylinder head combustion chamber
JPS61182416A (en) Subchamber type combustion chamber
JPH0610674A (en) Fuel injection device of in-cylinder fuel injection type engine
US4112877A (en) Internal combustion engine
JPH07293344A (en) Thermal insulation type gas engine
JP3414510B2 (en) Gas engine
JPS5644417A (en) Internal combustion engine with accessory combustion chamber
JPH0716029Y2 (en) Diesel engine combustion chamber
JPH06229320A (en) Direct injection-type high compression ratio gas engine
KR200236363Y1 (en) Indirect Injection Diesel Engine
JP3045664U (en) Direct injection diesel engine without black smoke
KR0184165B1 (en) Gasoline engine for a car having a squash piston
JPH03115725A (en) Fuel injection device for auxiliary chamber type insulated engine
JPS5924817Y2 (en) Combustion device of internal combustion engine
JPS59122722A (en) Combustion method for internal-combustion engine
JPH05280344A (en) Two cycle internal combustion engine
JPS5815637Y2 (en) Combustion chamber structure of internal combustion engine with auxiliary combustion chamber
JPH0460166A (en) Six-cycle diesel engine
JPH0460111A (en) Combustion chamber device of diesel engine
JPH0553929B2 (en)
JPH0814252B2 (en) Check valve device for sub-chamber gas engine
JP2001115845A (en) Cylinder fuel injection engine