JPS61182416A - Subchamber type combustion chamber - Google Patents
Subchamber type combustion chamberInfo
- 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
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
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)
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.
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)
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 |
-
1985
- 1985-02-07 JP JP60022370A patent/JPS61182416A/en active Pending
Cited By (3)
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 | |
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 | |
JPH08121127A (en) | Sealing structure for auxiliary chamber valve guide section in gas engine | |
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 |