JPH06280628A - Air-fuel ratio control device for automobile - Google Patents
Air-fuel ratio control device for automobileInfo
- Publication number
- JPH06280628A JPH06280628A JP8796393A JP8796393A JPH06280628A JP H06280628 A JPH06280628 A JP H06280628A JP 8796393 A JP8796393 A JP 8796393A JP 8796393 A JP8796393 A JP 8796393A JP H06280628 A JPH06280628 A JP H06280628A
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- Prior art keywords
- chamber
- sub
- valve
- gas
- fuel gas
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- Output Control And Ontrol Of Special Type Engine (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、トーチ点火用副室内に
導入した点火用燃料ガスに点火栓により着火せしめ、こ
れを主燃焼室内に噴出させて主燃焼室内の混合ガスに点
火燃焼させる方式のトーチ点火式ガスエンジンの燃料供
給装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is a system for igniting a fuel gas for ignition introduced into a sub chamber for ignition of a torch by a spark plug and ejecting the fuel gas into a main combustion chamber to ignite and burn a mixed gas in the main combustion chamber. To a fuel supply device for a torch ignition type gas engine.
【０００２】[0002]
【従来の技術】図２に従来のトーチ点火式ガスエンジン
の１例を示す。図において、１２３はピストン、１２２
はエンジン本体、１３１は主燃焼室、１１８はトーチ点
火副室、１１９は該副室１２５に設けられた点火栓であ
る。2. Description of the Related Art FIG. 2 shows an example of a conventional torch ignition type gas engine. In the figure, 123 is a piston and 122
Is an engine body, 131 is a main combustion chamber, 118 is a torch ignition sub-chamber, and 119 is a spark plug provided in the sub-chamber 125.
【０００３】燃料ガスは、燃料ガス供給元管１０１よ
り、ガスエンジン用供給元管１０２を通り、ここで主燃
料ガス供給管１０４とトーチ点火用副室ガス供給管１０
９とに分岐される。Fuel gas passes from a fuel gas supply source pipe 101 to a gas engine supply source pipe 102, where a main fuel gas supply pipe 104 and a torch ignition sub chamber gas supply pipe 10 are provided.
It branches to 9 and 9.
【０００４】主燃料ガスは前記ガス供給管１０４から電
磁弁１０５、圧力調整弁１０６、燃料量調整弁１０７、
ガスミキサ１０８、過給機１２４を通って、ガス圧力、
流量を調整されるとともに、空気と混合せしめられ、エ
ンジンの吸入行程において、主燃焼室１３１に吸入され
る。The main fuel gas is supplied from the gas supply pipe 104 to a solenoid valve 105, a pressure adjusting valve 106, a fuel amount adjusting valve 107,
Gas pressure is passed through the gas mixer 108 and the supercharger 124.
The flow rate is adjusted, mixed with air, and taken into the main combustion chamber 131 in the intake stroke of the engine.
【０００５】一方、トーチ点火用副室燃料ガスは、電磁
弁１１０を介して圧力調整弁１１６によりあらかじめ必
要圧力に調整され、主として、トーチ点火副室１１８内
の圧力がトーチ点火燃料ガス圧力より低下するとき即ち
エンジンの吸排気行程に逆止弁１１７を押し開いてトー
チ点火副室１１８内に流入する。そしてエンジン圧縮上
死点近傍で点火栓１１９の放電によりトーチ点火副室１
１８内のガスに着火させ、これを主燃料室１３１内の混
合ガス内に噴出させ、該混合ガスに点火燃焼させる。On the other hand, the torch ignition sub-chamber fuel gas is adjusted in advance to a required pressure by the pressure adjusting valve 116 via the solenoid valve 110, and the pressure in the torch ignition sub-chamber 118 is mainly lower than the torch ignition fuel gas pressure. When this is done, that is, during the intake and exhaust strokes of the engine, the check valve 117 is pushed open and flows into the torch ignition auxiliary chamber 118. Then, the torch ignition sub-chamber 1 is generated by the discharge of the spark plug 119 near the engine compression top dead center.
The gas in 18 is ignited, this is ejected into the mixed gas in the main fuel chamber 131, and the mixed gas is ignited and burned.
【０００６】トーチ点火用副室ガスの圧力は、過給機付
エンジンにおいては、エンジン吸入動作上、エンジン吸
入空気圧力よりも高い（一般に１ｋｇｆ／ｃｍ2 以上）
供給圧力を必要とする。このため、一般に、燃料ガス供
給元管１０１内圧力が１ｋｇｆ／ｃｍ2 を超えるような
ガス条件の許において、過給機付トーチ点火式ガスエン
ジンが採用されている。尚、１２６は燃料量調整弁制御
装置、１２５は電磁弁１０５，１１０の切換制御装置、
１２０は空気吸入管である。In the engine with a supercharger, the pressure of the torch ignition sub-chamber gas is higher than the engine intake air pressure due to the engine intake operation (generally 1 kgf / cm 2 or more).
Requires supply pressure. For this reason, generally, a torch ignition type gas engine with a supercharger is adopted under the gas condition that the internal pressure of the fuel gas supply pipe 101 exceeds 1 kgf / cm 2 . In addition, 126 is a fuel amount adjustment valve control device, 125 is a switching control device for the solenoid valves 105 and 110,
120 is an air suction pipe.
【０００７】[0007]
【発明が解決しようとする課題】トーチ点火ガスエンジ
ンにおいて、良好な着火、燃焼を確保するためには、ト
ーチ点火副室１１８内のガス濃度を常に適正な可燃混合
範囲に保つ必要がある。この濃度は、トーチ点火燃料ガ
ス圧力及び流量と、圧縮行程中ピストン１２３により圧
縮されてトーチ点火副室１１８内に流入する主燃焼室１
３１内の混合ガスとの混合割合で決定される。In the torch ignition gas engine, in order to ensure good ignition and combustion, the gas concentration in the torch ignition subchamber 118 must always be kept within an appropriate combustible mixing range. This concentration is the pressure and flow rate of the torch ignition fuel gas, and the main combustion chamber 1 that is compressed by the piston 123 during the compression stroke and flows into the torch ignition auxiliary chamber 118.
It is determined by the mixing ratio with the mixed gas in 31.
【０００８】ところがエンジンの始動時においては、低
回転であるため吸入空気が少なく主燃焼室１３１の混合
ガス濃度が濃い状態となる。このため、主燃料ガス量調
整弁（スロットル弁）１０７の開度、トーチ点火燃料ガ
ス圧力、ガス管路の遮断等を、エンジンの運転条件に応
じて微細に調整しないとエンジンが始動しないという問
題点がある。However, when the engine is started, the intake air is low and the mixed gas concentration in the main combustion chamber 131 is high because of the low rotation speed. Therefore, the engine will not start unless the opening degree of the main fuel gas amount adjusting valve (throttle valve) 107, the torch ignition fuel gas pressure, the cutoff of the gas pipeline, etc. are finely adjusted according to the operating conditions of the engine. There is a point.
【０００９】また、エンジンのアイドリング運転、負荷
運転においても、それぞれの運転条件に応じた上記ガス
条件の調整が必要であり、エンジンの運転操作が煩雑化
するという問題点もあった。In addition, in the idling operation and the load operation of the engine, it is necessary to adjust the gas conditions according to the respective operating conditions, and there is a problem that the operating operation of the engine becomes complicated.
【００１０】希薄燃焼ガスエンジンで採用されるトーチ
点火装置は、主燃室１３１の希薄混合ガスを完全燃焼さ
せるため、トーチ点火副室１１８内に純ガスを導入し、
主燃焼室１３１からエンジンの圧縮行程中に副室内に流
入した希薄混合ガスと前記純ガスとを混合させ、空燃比
が１に近い条件にし着火し易くして、点火栓１１９によ
り着火した強力火炎ジェットを主燃焼室１３１に噴出さ
せることにより主燃焼室１３１内の希薄混合ガスに着火
させ完全燃焼を図るものである。The torch igniter employed in the lean burn gas engine introduces pure gas into the torch ignition subchamber 118 in order to completely burn the lean mixed gas in the main combustion chamber 131.
A strong flame ignited by the spark plug 119 by mixing the lean mixed gas flowing from the main combustion chamber 131 into the sub chamber during the compression stroke of the engine with the pure gas so that the air-fuel ratio is close to 1 to facilitate ignition. By jetting the jet into the main combustion chamber 131, the lean mixed gas in the main combustion chamber 131 is ignited to achieve complete combustion.
【００１１】前記方式は主として過給機付エンジンにお
いて採用されるが、トーチ点火副室１１８に供給するガ
ス圧（以下副室ガス圧という）は、定格出力点では性能
排出ガスの点から数ｋｇｆ／ｃｍ2 の圧力を必要として
いる。このためエンジンの始動時及びアイドリング運転
時においてはまだ過給機を回転駆動し得る排気エネルギ
ーが皆無もしくは、非常に少いため、燃焼用空気を充分
得ることが出来ず、主燃焼室１３１内の混合ガスは濃混
合状態となっている。従って、始動時及びアイドリング
運転時に数ｋｇｆ／ｃｍ2 の副室ガスを供給すると、さ
らに濃混合状態になり、非常に着火しにくく、始動性の
悪化、アイドリング運転時の不安定性（回転変動）、ひ
いては定格運転時の性能悪化、排出ガス中のＮＯX 濃度
増大等の問題点が生起される。The above-mentioned method is mainly used in a supercharged engine, but the gas pressure supplied to the torch ignition subchamber 118 (hereinafter referred to as subchamber gas pressure) is several kgf from the point of performance exhaust gas at the rated output point. A pressure of / cm 2 is required. Therefore, at the time of starting the engine and at the time of idling operation, there is no or very little exhaust energy that can rotationally drive the supercharger, so that it is not possible to obtain sufficient combustion air and the mixing in the main combustion chamber 131 occurs. The gas is in a rich mixed state. Therefore, when the sub-chamber gas of several kgf / cm 2 is supplied at the time of starting and idling operation, the mixture becomes more densely mixed, it is extremely difficult to ignite, the startability deteriorates, the instability during idling operation (rotational fluctuation), thus performance deterioration at the time of the rated operation, a problem of the NO X concentration increases like in the exhaust gas is caused.
【００１２】従って、本発明の目的は、始動時、低速運
転時及び高負荷運転時に、夫々の運転条件に適応したガ
ス圧力、流量を保持できるようにして、始動性を向上す
るとともに、負荷運転時における燃焼の安定性を維持で
きるトーチ点火式ガスエンジンを提供することにある。Therefore, an object of the present invention is to improve the startability and load operation while maintaining the gas pressure and flow rate adapted to the respective operating conditions during starting, low speed operation and high load operation. An object of the present invention is to provide a torch ignition type gas engine capable of maintaining the stability of combustion over time.
【００１３】[0013]
【課題を解決するための手段】本発明は、前記課題を解
決するため、トーチ点火用副室内に導入された燃料ガス
に点火栓により着火し、これを該副室内から主燃焼室内
に噴出させて燃焼させる方式のトーチ点火式ガスエンジ
ンにおいて、主燃料ガス供給管０２より分岐されトーチ
点火副室１８に接続される副室ガス供給管の途中から高
圧供給路１１と低圧供給路１２とに分岐させて各供給路
１１，１２にこれら管路を開閉する電磁弁１３，１５及
びこれら管路内の圧力を調整する圧力調整弁１４，１６
を夫々介装し、前記副室ガス供給管０９の前記高、低圧
供給路１１，１２の分岐部の上流側に該管路０９を開閉
する開閉弁１０を設けたことを特徴とするものである。In order to solve the above-mentioned problems, the present invention ignites the fuel gas introduced into the torch ignition sub-chamber by a spark plug and ejects it from the sub-chamber into the main combustion chamber. In a torch ignition type gas engine that burns by combustion, a high-pressure supply passage 11 and a low-pressure supply passage 12 are branched from the middle of a sub-chamber gas supply pipe branched from the main fuel gas supply pipe 02 and connected to the torch ignition sub-chamber 18. Solenoid valves 13 and 15 for opening and closing these supply lines 11 and 12 and pressure adjusting valves 14 and 16 for adjusting the pressure in these lines.
And an on-off valve 10 for opening and closing the pipeline 09 is provided upstream of the branch portions of the high and low pressure supply channels 11, 12 of the auxiliary chamber gas supply pipeline 09. is there.
【００１４】また第２発明は、前記第１発明に、機関回
転数等の機関の運転条件が入力され機関の運転条件によ
り前記高圧供給路及び低圧供給路の開閉用電磁弁の切り
換えを制御する燃料ガス管路制御器を附設したことを特
徴としている。According to a second aspect of the present invention, the operating conditions of the engine such as the engine speed are input to the first aspect of the invention, and switching of the solenoid valves for opening and closing the high pressure supply path and the low pressure supply path is controlled according to the operating conditions of the engine. The feature is that a fuel gas pipeline controller is attached.
【００１５】[0015]
【作用】エンジンの始動直前は、トーチ点火副室への副
室ガス管路０９中の電磁弁１０を閉止してトーチ点火副
室へのガスを遮断し、主燃料ガス供給管０４へとガスを
流してエンジンを始動する。Immediately before starting the engine, the solenoid valve 10 in the sub-chamber gas line 09 to the torch ignition sub-chamber is closed to shut off the gas to the torch ignition sub-chamber and to the main fuel gas supply pipe 04. Flow to start the engine.
【００１６】回転数が若干上昇すると電磁弁１０を開い
て副室ガス管路０９にガスを流し、さらに低圧供給管１
２の電磁弁１５を開いて低圧燃料を定格回転数近傍まで
供給する。When the rotational speed is slightly increased, the solenoid valve 10 is opened to allow the gas to flow in the sub chamber gas pipe 09, and the low pressure supply pipe 1
The solenoid valve 15 of No. 2 is opened to supply the low pressure fuel up to near the rated speed.
【００１７】定格回転数近くになると、副室ガス通路を
高圧供給路１１に切り換え（電磁弁１３を開、電磁弁１
５を閉）、定格運転時は高圧供給路１１を流れる高圧ガ
スで運転される。このように、エンジンの運転条件に応
じて高、低圧のガスを使い分けるので、全運転域におい
て安定した運転ができる。When the rotation speed approaches the rated speed, the sub chamber gas passage is switched to the high pressure supply passage 11 (the solenoid valve 13 is opened, the solenoid valve 1 is opened).
(5 is closed), and at the time of rated operation, operation is performed with high-pressure gas flowing through the high-pressure supply path 11. In this way, the high and low pressure gases are selectively used according to the operating conditions of the engine, so stable operation can be performed in the entire operating range.
【００１８】[0018]
【実施例】以下図面を参照して本発明の実施例について
説明すると図１は本発明に係るガスエンジンの燃料供給
システムを示す系統図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a system diagram showing a fuel supply system for a gas engine according to the present invention.
【００１９】図において、２２はエンジン本体、２３は
ピストン、２１は吸気弁、２４は過給機、２０は空気吸
入管、０８はガスミキサ、５１は排気弁である。In the figure, 22 is an engine body, 23 is a piston, 21 is an intake valve, 24 is a supercharger, 20 is an air intake pipe, 08 is a gas mixer, and 51 is an exhaust valve.
【００２０】０１は燃料ガスが供給される燃料ガス供給
元管、０２はガスエンジン用の燃料ガス供給元管、０４
は主燃料ガス供給管、０９は主燃料ガス供給管０２から
分岐された副室ガス供給本管、０５は主燃料ガス供給管
路に介装された電磁弁、１０は副室ガス供給本管路０９
に介装された電磁遮断弁、０６は主燃料ガス管供給路に
設けられた圧力調整弁、０７は燃料量調整弁、２６は燃
料量調整弁制御装置である。Reference numeral 01 is a fuel gas supply source pipe to which fuel gas is supplied, 02 is a fuel gas supply source pipe for a gas engine, and 04.
Is a main fuel gas supply pipe, 09 is a sub-chamber gas supply main branched from the main fuel gas supply pipe 02, 05 is a solenoid valve interposed in the main fuel gas supply pipe, and 10 is a sub-chamber gas supply main Road 09
An electromagnetic shutoff valve installed in the fuel cell, 06 is a pressure adjusting valve provided in the main fuel gas pipe supply path, 07 is a fuel amount adjusting valve, and 26 is a fuel amount adjusting valve control device.
【００２１】次に本発明の要点であるトーチ点火用燃料
ガス供給系について説明すると、トーチ点火用副室ガス
供給本管０９には前記のように電磁遮断弁１０が設けら
れ、その後流が低圧供給管１２と高圧供給管１１とに分
岐されている。Next, the fuel gas supply system for torch ignition, which is the main point of the present invention, will be explained. The torch ignition sub-chamber gas supply main 09 is provided with the electromagnetic shutoff valve 10 as described above, and the afterflow is low pressure. It is branched into a supply pipe 12 and a high-pressure supply pipe 11.
【００２２】前記低圧供給管１２には、電磁弁１５及び
圧力調整弁１６が設けられ、高圧供給管１１にも電磁弁
１３及び圧力調整弁１４が設けられている。前記低圧供
給管１２及び高圧供給管１１は前記圧力調整弁１４，１
６の後流で再び合流し、逆止弁１７を経てトーチ点火副
室１８に接続されている。前記トーチ点火燃料用の副室
ガス供給本管路０９中の電磁遮断弁１０、低圧供給管１
２及び高圧供給管１１に夫々設けられた電磁弁１５，１
６及び主燃料ガス供給管０４に付設された電磁弁０５
は、燃料ガス管路切替え制御器２５により開閉を制御さ
れる。The low pressure supply pipe 12 is provided with an electromagnetic valve 15 and a pressure adjusting valve 16, and the high pressure supply pipe 11 is also provided with an electromagnetic valve 13 and a pressure adjusting valve 14. The low pressure supply pipe 12 and the high pressure supply pipe 11 are the pressure control valves 14, 1
6 merges again as a wake, and is connected to the torch ignition sub-chamber 18 via the check valve 17. Electromagnetic cutoff valve 10 in the sub-chamber gas supply main line 09 for the torch ignition fuel, low pressure supply pipe 1
2 and solenoid valves 15 and 1 provided on the high-pressure supply pipe 11, respectively
6 and solenoid valve 05 attached to the main fuel gas supply pipe 04
Is controlled to be opened and closed by the fuel gas line switching controller 25.
【００２３】又、エンジンのクランク軸に取付けられ
た、回転数検出器２７より検出された回転数信号は、回
転数設定器２８に入力され、ここで管路の切替エンジン
回転数を設定し、前記燃料ガス管路切替え制御器２５に
切換え信号を送る。Further, the rotation speed signal detected by the rotation speed detector 27 attached to the crankshaft of the engine is input to the rotation speed setting device 28, where the switching engine rotation speed of the pipeline is set, A switching signal is sent to the fuel gas line switching controller 25.
【００２４】先ず、定格負荷運転における作用について
説明する。定格負荷回転数か否かは、エンジン軸端に取
付けた回転数検出器２７からの検出信号を回転数設定器
２８に導入して判断し、燃料ガス供給管路制御器２５に
制御信号を送る。First, the operation in rated load operation will be described. Whether or not it is the rated load rotation speed is judged by introducing a detection signal from a rotation speed detector 27 attached to the engine shaft end into a rotation speed setting device 28, and sends a control signal to a fuel gas supply line controller 25. .
【００２５】主燃料ガスは燃料ガス本管０２から分岐さ
れた主燃料ガス管０４より、開の状態となっている電磁
弁０５，圧力調整弁０６を経て燃料量調整弁制御装置即
ちガバナ２６により制御される燃料量調整弁０７を通
り、ガス混合器０８に入る。空気は空気吸入管２０より
ガス混合器０８に入り、ここでガスと空気とが混合され
る。この混合ガスは過給機２４のコンプレッサで圧縮さ
れ、吸気行程中に燃焼室内に導入される。The main fuel gas is supplied from the main fuel gas pipe 04 branched from the fuel gas main pipe 02, to the solenoid valve 05 and the pressure regulating valve 06 which are in an open state, and then to the fuel amount regulating valve control device, that is, the governor 26. It enters the gas mixer 08 through the controlled fuel amount adjusting valve 07. Air enters the gas mixer 08 through the air suction pipe 20, where the gas and air are mixed. This mixed gas is compressed by the compressor of the supercharger 24 and introduced into the combustion chamber during the intake stroke.
【００２６】一方トーチ燃料ガスは副室ガス供給本管０
９より、閉状態となっている電磁遮蔽弁１０を経て高圧
供給管１１に入り、閉状態となっている電磁弁１３を通
り、圧力調整弁１４によりあらかじめ高圧に調整（１〜
３ｋｇｆ／ｃｍ2 ）され、逆止弁１７を介して主として
吸気行程時にトーチ点火副室１８内へ導入される。この
時低圧供給管１２に設けられた電磁弁１５は制御器２５
により閉塞される。このように管路を回転数設定器２８
により設定し燃料ガス管路制御器２５により切替え制御
し定格負荷時に必要な高圧のトーチ燃料ガスを供給す
る。On the other hand, the torch fuel gas is supplied to the sub chamber gas supply main pipe 0
9, the high pressure supply pipe 11 enters through the electromagnetic shutoff valve 10 in the closed state, passes through the electromagnetic valve 13 in the closed state, and is adjusted to a high pressure in advance by the pressure adjusting valve 14 (1 to 1
3 kgf / cm 2 ) and is introduced into the torch ignition sub-chamber 18 mainly through the check valve 17 during the intake stroke. At this time, the solenoid valve 15 provided in the low pressure supply pipe 12 is controlled by the controller 25.
Is blocked by. In this way, the pipe is
The fuel gas pipeline controller 25 controls the switching, and supplies the high pressure torch fuel gas required at the rated load.
【００２７】次に始動時の作用について説明する。始動
直前に主燃料ガス供給管０４の電磁弁０５を開くととも
に、燃料量調整弁０７はガバナ２６により始動開度に設
定する。また、副室ガス供給本管０９の電磁遮断弁１０
を閉止する。Next, the operation at the time of starting will be described. The solenoid valve 05 of the main fuel gas supply pipe 04 is opened immediately before starting, and the fuel amount adjusting valve 07 is set to the starting opening degree by the governor 26. Further, the electromagnetic shutoff valve 10 of the sub-chamber gas supply main 09
Close.
【００２８】この状態で図示しないスターターでエンジ
ンをモータリングすると、主燃料ガスが吸気行程時に主
燃焼室３１内に導入され、圧縮行程時にトーチ点火副室
１８の噴口部よりトーチ点火副室１８内に入る。圧縮の
上死点近傍で点火栓１９により着火されたガスは、トー
チ点火副室１８の噴口部より火炎ジェットとなり主燃焼
室３１に噴出し、燃焼室全体に火炎伝播する。When the engine is motorized by a starter (not shown) in this state, the main fuel gas is introduced into the main combustion chamber 31 during the intake stroke, and the inside of the torch ignition subchamber 18 is injected from the injection port of the torch ignition subchamber 18 during the compression stroke. to go into. The gas ignited by the spark plug 19 near the top dead center of compression becomes a flame jet from the injection port of the torch ignition sub-chamber 18 and is ejected to the main combustion chamber 31 to propagate to the entire combustion chamber.
【００２９】このようにして着火始動すると回転数が急
激に上昇するが、回転数設定器２８で設定した所定の回
転数に達すると、副室ガス供給本管０９の電磁遮断弁１
０が開くとともに、低圧供給管１２の電磁弁１５が開
き、トーチ点火用燃料ガスは、圧力調整弁１６により１
ｋｇｆ／ｃｍ2 以下の低圧に調整され、逆止弁１７を経
て主として吸気行程時にトーチ点火副室１８内に導入さ
れ、以下着火，主燃焼室３１での燃焼へと進行し、エン
ジンの回転は更に上昇する。この時高圧供給管１１の電
磁弁１３は制御器２５により閉塞されている。When the ignition is started in this way, the rotation speed sharply rises, but when the predetermined rotation speed set by the rotation speed setting device 28 is reached, the electromagnetic shutoff valve 1 of the sub-chamber gas supply main 09 is cut off.
0 is opened, the solenoid valve 15 of the low-pressure supply pipe 12 is opened, and the torch ignition fuel gas is set to 1 by the pressure adjusting valve 16.
The pressure is adjusted to a low pressure of kgf / cm 2 or less, is introduced into the torch ignition sub-chamber 18 mainly through the check valve 17 during the intake stroke, and then proceeds to ignition, combustion in the main combustion chamber 31, and rotation of the engine. Further rise. At this time, the solenoid valve 13 of the high pressure supply pipe 11 is closed by the controller 25.
【００３０】以上のように、トーチ点火副室１８への燃
料ガスの供給は、始動直前は電磁遮断弁１０を閉止遮断
し、エンジンが着火し若干の回転上昇後、低圧供給管１
２路の電磁弁１５を開いてガスを供給し、定格回転数近
くまでこの低圧管路にて供給する。As described above, when the fuel gas is supplied to the torch ignition sub-chamber 18, the electromagnetic cut-off valve 10 is closed and cut off immediately before the engine is started, the engine is ignited, and the low-pressure supply pipe 1 is slightly rotated.
The two-way solenoid valve 15 is opened to supply gas, and the gas is supplied through this low-pressure line up to the rated speed.
【００３１】定格回転数近くに達すると、前述したよう
に高圧供給管１１路に切替え、定格負荷運転までこの管
路にて燃料ガスを供給、運転される。このように、エン
ジン回転数を検知してエンジン仕様条件に合せ回転数設
定器２８にて仕用回転数を任意に設定し燃料ガス管路切
替制御器２５により各電磁弁の開閉を切替え制御する。When the rotation speed approaches the rated speed, as described above, the high pressure supply pipe 11 is switched to and the fuel gas is supplied and operated through this pipe until the rated load operation. In this way, the engine speed is detected, the working speed is arbitrarily set by the speed setting unit 28 according to the engine specification condition, and the opening / closing of each solenoid valve is controlled by the fuel gas line switching controller 25. .
【００３２】[0032]
【発明の効果】本発明は以上のように構成されているの
で、次の作用効果が得られる。 （１）比較的困難であるガスエンジンの始動を、複数な
装置、運転操作を必要とせず容易に行うことができる。 （２）始動，アイドリング，定格負荷運転における適切
なトーチ点火燃料ガス圧力が与えられることにより、夫
々の運転時の燃焼の安定性が得られ、回転変動が減少す
る。又定格負荷運転時の性能改善及び排出ガスの改善が
得られる。 （３）エンジンの仕様条件により、管路の切替え設定回
転数及び、トーチ点火燃料ガス供給圧力を任意に設定
し、制御することができる。Since the present invention is constructed as described above, the following operational effects can be obtained. (1) It is possible to easily start the gas engine, which is relatively difficult, without requiring a plurality of devices and driving operations. (2) By providing an appropriate torch ignition fuel gas pressure in starting, idling, and rated load operation, combustion stability during each operation is obtained, and rotational fluctuation is reduced. Further, performance improvement and exhaust gas improvement at the time of rated load operation can be obtained. (3) It is possible to arbitrarily set and control the switching rotational speed of the pipeline and the torch ignition fuel gas supply pressure according to the engine specification conditions.
【図１】本発明の実施例に係るトーチ点火式ガスエンジ
ンの燃料供給装置の系統図。FIG. 1 is a system diagram of a fuel supply device for a torch ignition type gas engine according to an embodiment of the present invention.
【図２】従来例を示す図１応当図。FIG. 2 is a corresponding diagram of FIG. 1 showing a conventional example.
０１…燃料ガス供給元管、 ０２…ガスエンジン用燃料ガス供給元管、 ０４…主燃料ガス供給管、 ０７…燃料流量調整弁、 ０９…副室ガス供給管、 １０…電磁遮断弁、 １１…高圧供給管、 １２…低圧供給管、 １３，１５…電磁弁、 １４，１６…圧力調整弁、 １７…逆止弁、 １８…トーチ点火副室、 １９…点火栓、 ２０…空気吸入管、 ２１…吸気弁、 ２３…ピストン、 ２４…過給機、 ２５…燃料ガス管路制御器、 ２７…回転数検出器、 ２８…回転数設定器。 01 ... Fuel gas supply source pipe, 02 ... Fuel gas supply source pipe for gas engine, 04 ... Main fuel gas supply pipe, 07 ... Fuel flow rate adjusting valve, 09 ... Sub chamber gas supply pipe, 10 ... Electromagnetic cutoff valve, 11 ... High-pressure supply pipe, 12 ... Low-pressure supply pipe, 13, 15 ... Solenoid valve, 14, 16 ... Pressure regulating valve, 17 ... Check valve, 18 ... Torch ignition sub-chamber, 19 ... Spark plug, 20 ... Air suction pipe, 21 ... intake valve, 23 ... piston, 24 ... supercharger, 25 ... fuel gas line controller, 27 ... rotation speed detector, 28 ... rotation speed setting device.
Claims (2)
スに点火栓により着火し、これを該副室内から主燃焼室
内に噴出させて燃焼させる方式のトーチ点火式ガスエン
ジンにおいて、 主燃料ガス供給管（０２）より分岐されトーチ点火副室
１８に接続される副室ガス供給管の途中から高圧供給路
（１１）と低圧供給路（１２）とに分岐させて各供給路
（１１），（１２）にこれら管路を開閉する電磁弁（１
３），（１５）及びこれら管路内の圧力を調整する圧力
調整弁（１４），（１６）を夫々介装し、前記副室ガス
供給管（０９）の前記高、低圧供給路（１１），（１
２）の分岐部の上流側に該管路（０９）を開閉する開閉
弁（１０）を設けたことを特徴とするトーチ点火式ガス
エンジンの燃料ガス供給装置。1. A torch ignition type gas engine of a system in which a fuel gas introduced into a torch ignition sub-chamber is ignited by a spark plug and ejected from the sub-chamber into a main combustion chamber for combustion to provide a main fuel gas. The sub-chamber gas supply pipe branched from the supply pipe (02) and connected to the torch ignition sub-chamber 18 is branched into a high-pressure supply passage (11) and a low-pressure supply passage (12) to supply each of the supply passages (11), (12) Solenoid valve (1
3), (15) and pressure regulating valves (14), (16) for regulating the pressure in these pipelines, respectively, are provided, and the high and low pressure supply channels (11) of the sub chamber gas supply pipe (09) are provided. ), (1
A fuel gas supply device for a torch ignition type gas engine, characterized in that an on-off valve (10) for opening and closing the pipe (09) is provided on the upstream side of the branch portion of 2).
スに点火栓により着火し、これを該副室内から主燃焼室
内に噴出させて燃焼させる方式のトーチ点火式ガスエン
ジンにおいて、 主燃料ガス供給管（０２）より分岐されトーチ点火副室
１８に接続される副室ガス供給管の途中から高圧供給路
（１１）と低圧供給路（１２）とに分岐させて各供給路
（１１），（１２）にこれら管路を開閉する電磁弁（１
３），（１５）及びこれら管路内の圧力を調整する圧力
調整弁（１４），（１６）を夫々介装し、前記副室ガス
供給管（０９）の前記高、低圧供給路（１１），（１
２）の分岐部の上流側に該管路（０９）を開閉する開閉
弁（１０）を設け、機関回転数等の機関の運転条件が入
力され、機関の運転条件により前記高圧供給路（１１）
及び低圧供給路（１２）の開閉用電磁弁の切り換えを制
御する燃料ガス管路制御器（２５）を備えたことを特徴
とするトーチ点火式ガスエンジンの燃料供給装置。2. A torch ignition type gas engine of a type in which a fuel gas introduced into a torch ignition sub-chamber is ignited by a spark plug and is ejected from the sub-chamber into a main combustion chamber to be combusted. The sub-chamber gas supply pipe branched from the supply pipe (02) and connected to the torch ignition sub-chamber 18 is branched into a high-pressure supply passage (11) and a low-pressure supply passage (12) to supply each of the supply passages (11), (12) Solenoid valve (1
3), (15) and pressure regulating valves (14), (16) for regulating the pressure in these pipelines, respectively, are provided, and the high and low pressure supply channels (11) of the sub chamber gas supply pipe (09) are provided. ), (1
An on-off valve (10) for opening and closing the pipe (09) is provided on the upstream side of the branch portion of 2), and operating conditions of the engine such as the engine speed are input, and the high-pressure supply line (11) is set according to the operating condition of the engine. )
And a fuel gas pipeline controller (25) for controlling switching of an electromagnetic valve for opening and closing the low pressure supply passage (12), a fuel supply device for a torch ignition type gas engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8796393A JPH06280628A (en) | 1993-03-23 | 1993-03-23 | Air-fuel ratio control device for automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8796393A JPH06280628A (en) | 1993-03-23 | 1993-03-23 | Air-fuel ratio control device for automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06280628A true JPH06280628A (en) | 1994-10-04 |
Family
ID=13929519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8796393A Withdrawn JPH06280628A (en) | 1993-03-23 | 1993-03-23 | Air-fuel ratio control device for automobile |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06280628A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170082076A1 (en) * | 2015-09-17 | 2017-03-23 | Caterpillar Inc. | Pressure regulator for fuel supply system |
| US10811850B2 (en) | 2018-09-26 | 2020-10-20 | Denso Corporation | Spark plug of internal combustion engine |
| CN113982739A (en) * | 2021-11-18 | 2022-01-28 | 山东大学 | Turbulent jet ignition system, gas supply system and method for large-cylinder-diameter gas engine |
| CN115095424A (en) * | 2022-06-17 | 2022-09-23 | 潍柴动力股份有限公司 | Transient compensation ultra-lean-burn gas engine and method |
-
1993
- 1993-03-23 JP JP8796393A patent/JPH06280628A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170082076A1 (en) * | 2015-09-17 | 2017-03-23 | Caterpillar Inc. | Pressure regulator for fuel supply system |
| US10811850B2 (en) | 2018-09-26 | 2020-10-20 | Denso Corporation | Spark plug of internal combustion engine |
| CN113982739A (en) * | 2021-11-18 | 2022-01-28 | 山东大学 | Turbulent jet ignition system, gas supply system and method for large-cylinder-diameter gas engine |
| CN115095424A (en) * | 2022-06-17 | 2022-09-23 | 潍柴动力股份有限公司 | Transient compensation ultra-lean-burn gas engine and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20000530 |