JPS592795B2 - Internal combustion engine ignition timing control device - Google Patents
Internal combustion engine ignition timing control deviceInfo
- Publication number
- JPS592795B2 JPS592795B2 JP1266577A JP1266577A JPS592795B2 JP S592795 B2 JPS592795 B2 JP S592795B2 JP 1266577 A JP1266577 A JP 1266577A JP 1266577 A JP1266577 A JP 1266577A JP S592795 B2 JPS592795 B2 JP S592795B2
- Authority
- JP
- Japan
- Prior art keywords
- ignition timing
- power system
- negative pressure
- internal combustion
- combustion engine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P5/00—Advancing or retarding ignition; Control therefor
- F02P5/04—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions
- F02P5/05—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions using mechanical means
- F02P5/10—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions using mechanical means dependent on fluid pressure in engine, e.g. combustion-air pressure
- F02P5/103—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions using mechanical means dependent on fluid pressure in engine, e.g. combustion-air pressure dependent on the combustion-air pressure in engine
Description
【発明の詳細な説明】
本発明は排気対策のために希薄混合気を燃焼させる内燃
機関の点火時期制御装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an ignition timing control device for an internal combustion engine that burns a lean air-fuel mixture to reduce exhaust emissions.
一般に気化器の空燃比の設定は、高負荷時には出力空燃
比、低負荷時には経済空燃比にしているが、排気対策の
ために希薄混合気を燃焼させる内燃機関では高負荷時と
低負荷時との空燃比の差が大きく、要求される点火時期
も大幅に異る。Generally, the air-fuel ratio of the carburetor is set to the output air-fuel ratio at high loads, and to the economic air-fuel ratio at low loads, but in internal combustion engines that burn lean mixtures to prevent exhaust emissions, the air-fuel ratio is set at the output air-fuel ratio at high loads and at low loads. The difference in air-fuel ratio is large, and the required ignition timing is also significantly different.
すなわち、低負荷時の希薄混合気では燃焼速度が遅いの
で点火時期を進角させることが要求され、高負荷時では
低負荷時より濃厚な混合気であって燃焼速度が早いので
遅角させることが要求される。In other words, when the fuel mixture is lean at low load, the combustion speed is slow, so it is necessary to advance the ignition timing, and at high load, the mixture is richer and the combustion speed is faster than when the load is low, so it is necessary to retard the ignition timing. is required.
とくに、気化器のパワー系が作動する境界付近では近似
した吸入負圧に対してパワー系の作動と非作動とにより
空燃比の差が著しく、希薄混合気に要求される点火時期
のままでは、パワー系が作動した時にノッキングなどの
異常燃焼が生じることになる。In particular, near the boundary where the carburetor's power system operates, there is a significant difference in air-fuel ratio between the power system's operation and non-operation for similar intake negative pressures, and if the ignition timing required for a lean mixture remains the same, Abnormal combustion such as knocking occurs when the power system operates.
そこで本発明は、気化器のパワー系と連動する制御手段
を点火装置に設け、前記制御手段でパワー系の作動時に
点火時期をその非作動時よりも遅出させ、低負荷時には
希薄混合気でも十分に燃焼し、高負荷時にノッキングを
起こすなどの異常燃焼が生じないようにした点火時期制
御装置を提供するものである。Therefore, the present invention provides an ignition device with a control means that is linked to the power system of the carburetor, and uses the control means to delay the ignition timing when the power system is activated compared to when it is not activated, so that a lean mixture is sufficient at low loads. The purpose of the present invention is to provide an ignition timing control device that allows combustion to occur smoothly and prevents abnormal combustion such as knocking during high loads.
なお、点火時期を遅角制御するものとしては特公昭４７
−４３６８２号公報に記載のものが知られているが、こ
れは変速ギアの特定位置に応じて制御を行う点で本発明
と構成を全く異にする。Furthermore, as a method for retarding the ignition timing, the
A device described in Japanese Patent No. 43682 is known, but this device has a completely different configuration from the present invention in that control is performed depending on a specific position of the transmission gear.
また、実開昭５２−１３８１４．２号公報には、機関の
高出力時に点火時期の制御を行うものがみられるが、こ
れは二点着火エンジンを前提として点火時期の進角制御
を行うものであり、本発明とは前提技術および作用の点
において異なるものである。Furthermore, in Japanese Utility Model Application Publication No. 52-13814.2, there is a method that controls the ignition timing when the engine output is high, but this is a method that performs advance control of the ignition timing assuming a two-point ignition engine. This is different from the present invention in terms of underlying technology and operation.
なお、加速時に吸入管に燃料を追加供給すると共に、そ
の際の混合気濃度に適応するように点火時期を遅角させ
るようにしたものは、先行技術例である特開昭５２−８
２３３号公報に記載されている。In addition, a prior art example of a system in which fuel is additionally supplied to the intake pipe during acceleration and the ignition timing is retarded to adapt to the mixture concentration at that time is disclosed in Japanese Patent Laid-Open No. 52-8
It is described in Publication No. 233.
以下、図面を参照して本発明の一実施例を具体的に説明
する。Hereinafter, one embodiment of the present invention will be specifically described with reference to the drawings.
図において、１は気化器で、フロート室２とメインジェ
ット３を介して連通ずるメインノズル４を備えたメイン
系５と、後述するパワー系６とを有している。In the figure, 1 is a carburetor, which has a main system 5 equipped with a main nozzle 4 that communicates with a float chamber 2 via a main jet 3, and a power system 6 that will be described later.
パワー系６は、フロート室２とメイン系５の燃料流路を
メインジェット３下流側で連通させた燃料流路７に常閉
の弁８が設けられ、この弁８を作動させるロッド９が負
圧室１０に設けたピストン１１に固定され、前記負圧室
１０に吸入管１２と狛圧通路１３で連通され、前記負圧
室１０に作用する吸入管負圧が小さくなる高負荷時にの
みピストン１１が作動しロッド９を介して前記弁８を開
き、燃料をメイン系５に追加供給するように構成されて
いる。In the power system 6, a normally closed valve 8 is provided in a fuel passage 7 that communicates the fuel passages of the float chamber 2 and the main system 5 downstream of the main jet 3, and a rod 9 that operates this valve 8 is operated under negative pressure. The piston 11 is fixed to a piston 11 provided in a chamber 10, and communicates with the negative pressure chamber 10 through a suction pipe 12 and a pressure passage 13, and the piston 11 is connected only during high load when the suction pipe negative pressure acting on the negative pressure chamber 10 becomes small. is operated to open the valve 8 via the rod 9 and additionally supply fuel to the main system 5.
また、１４は点火装置で点火４全群１５、ディストリビ
ュータ１６、イグニッションコイル１７、並列に設置さ
れた進角用および遅角用断続器１８．１９を備え、これ
らの断続器１８．１９は後述する制御手段２０で切換え
られて片方だけが作動されるように構成されている前記
制御手段２０は、負圧応動スイッチ２１で作動する電磁
リレー２２を備え、このリレー２２のコイル２２Ｃの励
磁により、断続器１８．１９の回路に設けたリレー接点
２２ａ、２２ｂを開閉作動するように構成され、前記負
圧スイッチ２１の負圧室２１ａかパワー系６の負圧通路
１３を介して吸入管１２と連通されている。Further, 14 is an ignition system which includes a complete group of ignition 4 15, a distributor 16, an ignition coil 17, and advance and retard interrupters 18 and 19 installed in parallel, and these interrupters 18 and 19 will be described later. The control means 20, which is configured to be switched by the control means 20 so that only one side is activated, includes an electromagnetic relay 22 that is activated by a negative pressure response switch 21, and when a coil 22C of this relay 22 is energized, it can be switched on and off. The relay contacts 22a and 22b provided in the circuit of the device 18 and 19 are configured to open and close, and communicate with the suction pipe 12 via the negative pressure chamber 21a of the negative pressure switch 21 or the negative pressure passage 13 of the power system 6. has been done.
なお、図において、２３はスロットル弁、２４はメイン
スイッチ、２５は電源、２６は断続器のカムを示す。In the figure, 23 is a throttle valve, 24 is a main switch, 25 is a power source, and 26 is a cam of an interrupter.
以上の構成において、低負荷時には吸入管負圧が大きい
ので、パワー系６が非作動状態であると共に、負圧応動
スイッチ２１がオンであって電磁リレー２２のコイル２
２（Ｃが励磁され、進角用断続器１８側のリレー接点２
２ａが閉じ、この断続器１８が作動していることにより
、点火時期が希薄混合気に適した進角状態にされる。In the above configuration, when the load is low, the suction pipe negative pressure is large, so the power system 6 is inactive, the negative pressure response switch 21 is on, and the coil 2 of the electromagnetic relay 22
2 (C is energized, relay contact 2 on the advance angle interrupter 18 side
2a is closed and this interrupter 18 is operating, the ignition timing is advanced to a state suitable for a lean air-fuel mixture.
高負荷時に吸入管負圧が小さくなってパワー系６が作動
し燃料が追加供給される状態になると同時に、前記負圧
応動スイッチ２１がオフとなって電磁リレー２２のコイ
ル２２Ｃが消磁され、遅角用断続器１９側のリレー接点
２２ｂが閉じ、この断続器１９が作動されることにより
点火時期が低負荷時より濃厚な混合気に適した遅角状態
にされる。At the time of high load, the suction pipe negative pressure becomes small and the power system 6 is activated to supply additional fuel, and at the same time, the negative pressure responsive switch 21 is turned off and the coil 22C of the electromagnetic relay 22 is demagnetized, causing a delay. The relay contact 22b on the corner interrupter 19 side is closed, and the interrupter 19 is operated to retard the ignition timing, which is more suitable for a rich air-fuel mixture than when the load is low.
なお、前記パワー系作動状態から非作動状態に戻ると、
再び点火時期が進角状態になることは勿論である。Note that when the power system returns from the operating state to the non-operating state,
Of course, the ignition timing is advanced again.
以上説明したように本発明は、パワー系の作動と連動す
る制御手段によって点火時期を制御し、低負荷時には希
薄混合気の燃焼速度が遅いのを点火時期の進角によって
補い完全燃焼化をはかることができ、しかも高負荷のパ
ワー系作動時にはその作動と同時にやや濃厚化した混合
気に適する点火時期に遅角させて、ノッキングなどの異
常燃焼を防止させることができるものである。As explained above, the present invention controls the ignition timing by means of a control means that is linked to the operation of the power system, and advances the ignition timing to compensate for the slow combustion speed of lean air-fuel mixtures at low loads to achieve complete combustion. Moreover, when the power system is operating under high load, the ignition timing is retarded to suit a slightly rich mixture at the same time as the power system is operating, thereby preventing abnormal combustion such as knocking.
図は本発明の一実施例を示す構成説明図である。
１・・・気化器、２・・・フロート室、３・・・メイン
ノズル１−１４・・・メインノズル、５・・・メイン系
、６・・・パワー系、γ・・・パワー系の燃料流路、８
・・すｈ９・・ロッド、１０・・・負圧室、１１・・・
ピストン、１２・・・吸入管、１３・・・負圧通路、１
４・・・点火装置、１５・・・点火栓、１６・・・ディ
ストリビュータ、１７・・・イグニッションコイル１８
・・４角用断続器、１９・・・遅角用断続器、２０・・
・制御手段、２１・・・負圧応動スイツ六 ２２・・・
電磁リレー、２３・・・スロットル弁、２４・・・メイ
ンスイッチ、２５・・・電源、２６・・・カム。The figure is a configuration explanatory diagram showing one embodiment of the present invention. 1... Carburetor, 2... Float chamber, 3... Main nozzle 1-14... Main nozzle, 5... Main system, 6... Power system, γ... Power system fuel flow path, 8
...Sh9...Rod, 10...Negative pressure chamber, 11...
Piston, 12... Suction pipe, 13... Negative pressure passage, 1
4...Ignition device, 15...Ignition plug, 16...Distributor, 17...Ignition coil 18
・・Interrupter for four angles, 19・・Interrupter for retardation, 20・・
- Control means, 21...Negative pressure response switch 6 22...
Electromagnetic relay, 23...throttle valve, 24...main switch, 25...power supply, 26...cam.
Claims (1)
のパワー系と連動し吸入管負圧により作動する負圧応動
スイッチを有する節制手段を、点火装置に設け、前記制
御手段でパワー系の作動時の混合気濃度に適応するよう
に、点火時期をパワー系の非作動時より遅角させるよう
にしたことを特徴とする内燃機関の点火時期制御装置。1. In an internal combustion engine that burns a lean air-fuel mixture, the ignition device is provided with a moderation means having a negative pressure responsive switch that is linked to the power system of the carburetor and activated by negative pressure in the suction pipe, and the control means controls when the power system is activated. An ignition timing control device for an internal combustion engine, characterized in that the ignition timing is retarded from when the power system is not operating so as to adapt to the air-fuel mixture concentration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1266577A JPS592795B2 (en) | 1977-02-08 | 1977-02-08 | Internal combustion engine ignition timing control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1266577A JPS592795B2 (en) | 1977-02-08 | 1977-02-08 | Internal combustion engine ignition timing control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5399144A JPS5399144A (en) | 1978-08-30 |
| JPS592795B2 true JPS592795B2 (en) | 1984-01-20 |
Family
ID=11811651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1266577A Expired JPS592795B2 (en) | 1977-02-08 | 1977-02-08 | Internal combustion engine ignition timing control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS592795B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5835269A (en) * | 1981-08-25 | 1983-03-01 | Mazda Motor Corp | Knocking control device of engine |
| JPS59194059A (en) * | 1983-04-19 | 1984-11-02 | Toyota Motor Corp | Control method and device for air-fuel ratio and ignition timing |
| JPS60145455A (en) * | 1983-12-29 | 1985-07-31 | Kogata Gas Reibou Gijutsu Kenkyu Kumiai | Ignition timing retarder for gas engine |
-
1977
- 1977-02-08 JP JP1266577A patent/JPS592795B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5399144A (en) | 1978-08-30 |
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