JPS62154248U

JPS62154248U -

Info

Publication number: JPS62154248U
Application number: JP4183386U
Authority: JP
Priority date: 1986-03-24
Filing date: 1986-03-24
Publication date: 1987-09-30

Description

[Brief explanation of the drawing]

第１図はこの考案による内燃機関の点火時期制
御装置の基本的構成を示す機能ブロツク図、第２
図は同じくその作用説明のための説明図、第３図
はこの考案の一実施例を示す内燃機関のシステム
構成図、第４図は第３図のコントロールユニツト
内のマイクロコンピユータによる点火時期制御及
びＳＣＶの開閉制御に係わる動作を示すフロー図
、第５図は同じくそのマイクロコンピユータに設
けられるフラグ用レジスタの説明図、第６図は第
３図のフロー図に基づいてＳＣＶが閉から開にな
る動作と点火進角との関係の一例を示す線図であ
る。１……エンジン本体、２……エアクリーナ、３
……吸気管、４……インジエクタ、５……点火プ
ラグ、７……排気管、８……触媒コンバータ、９
……絞り弁、１０……コントロールユニツト、１
１……エアフローメータ、１２……絞り弁開度セ
ンサ、１３……圧力センサ、１４……クランク角
センサ、１５……水温センサ、１６……酸素セン
サ、１７……スワールコントロールバルブ（ＳＣ
Ｖ：吸気制御弁）、１８……負圧アクチユエータ
、１９……ソレノイドバルブ。 Fig. 1 is a functional block diagram showing the basic configuration of the ignition timing control device for an internal combustion engine according to this invention;
3 is a system configuration diagram of an internal combustion engine showing an embodiment of this invention, and FIG. 4 shows ignition timing control and A flowchart showing the operation related to the opening/closing control of the SCV, FIG. 5 is an explanatory diagram of the flag register provided in the microcomputer, and FIG. 6 shows how the SCV changes from closed to open based on the flowchart in FIG. 3. FIG. 3 is a diagram showing an example of the relationship between operation and ignition advance angle. 1...Engine body, 2...Air cleaner, 3
... Intake pipe, 4 ... Injector, 5 ... Spark plug, 7 ... Exhaust pipe, 8 ... Catalytic converter, 9
... Throttle valve, 10 ... Control unit, 1
1... Air flow meter, 12... Throttle valve opening sensor, 13... Pressure sensor, 14... Crank angle sensor, 15... Water temperature sensor, 16... Oxygen sensor, 17... Swirl control valve (SC
V: intake control valve), 18... negative pressure actuator, 19... solenoid valve.

Claims

[Claims for Utility Model Registration] An intake control valve, and when the engine speed decreases, the intake control valve is changed from open to closed when the engine speed drops below a preset first speed _N1 , and when the engine speed increases, the An internal combustion engine comprising an intake control valve opening/closing means for opening the intake control valve from closed when the rotation speed becomes higher than a second rotation speed _N2 which is higher than the first rotation speed _N1 , the engine rotation speed and a memory storing a map of ignition timing advance values according to load conditions such as intake air amount and the like, and whether or not the engine speed is between the first speed _N1 and the second speed _N2 . an intake control valve open/close determination means for determining whether the intake control valve is closed or open; and an intake control valve open/close determination means for determining whether the intake control valve is closed or open; When it is determined that the number is not between the first and second engine speeds, the ignition timing is controlled by the advance value read from the table corresponding to the engine speed at that time in the map stored in the memory, and the engine speed is determined to be between the first and second engine speeds.
When it is determined that the rotation speed is between the second rotation speed, the result of the determination by the intake control valve opening/closing means indicates that if the intake control valve is closed, the intake air and ignition timing control means for controlling the ignition timing according to advance angle values respectively read from the table corresponding to the second rotation speed of the map when the control valve is open. Control device.