JPS63125146U

JPS63125146U -

Info

Publication number: JPS63125146U
Application number: JP1725087U
Authority: JP
Priority date: 1987-02-10
Filing date: 1987-02-10
Publication date: 1988-08-16

Description

[Brief explanation of drawings]

第１図は本考案の構成図、第２図は本考案の一
実施例を示すシステム図、第３図は同上実施例に
おける酸素センサの出力電圧特性を示すグラフ、
第４図及び第５図は同上実施例における燃料噴射
量の増減補正制御を示すフローチヤート、第６図
は同上実施例における制御特性を示すタイムチヤ
ート、第７図は従来のアイドル空燃比制御を説明
するためのフローチヤート、第８図は従来のアイ
ドル空燃比調整装置のシステム概略図、第９図は
三元触媒出口における各種排気成分濃度と空燃比
との関係を示すグラフである。１……機関、８……燃料噴射弁、９……コント
ロールユニツト、１０……エアフローメータ、１
５……酸素センサ、１６……トリガースイツチ。 FIG. 1 is a configuration diagram of the present invention, FIG. 2 is a system diagram showing an embodiment of the present invention, and FIG. 3 is a graph showing the output voltage characteristics of the oxygen sensor in the same embodiment.
4 and 5 are flowcharts showing the increase/decrease correction control of the fuel injection amount in the above embodiment, FIG. 6 is a time chart showing the control characteristics in the above embodiment, and FIG. 7 is a flow chart showing the conventional idle air-fuel ratio control. FIG. 8 is a flowchart for explaining the system, FIG. 8 is a system schematic diagram of a conventional idle air-fuel ratio adjusting device, and FIG. 9 is a graph showing the relationship between the concentrations of various exhaust components and the air-fuel ratio at the outlet of the three-way catalyst. 1... Engine, 8... Fuel injection valve, 9... Control unit, 10... Air flow meter, 1
5...Oxygen sensor, 16...Trigger switch.

Claims

[Scope of utility model registration request]

An electronically controlled fuel injection system comprising a fuel injection amount setting means for setting a fuel injection amount based on an engine operating state, and a fuel injection valve drive control means for driving and controlling a fuel injection valve according to the set fuel injection amount. In the internal combustion engine, an increase/decrease correction amount adjustment setting means is activated by a predetermined trigger signal and sets an increase/decrease correction amount of the fuel injection amount in an engine idling operating state by changing it at a predetermined rate of change within a predetermined range, and the trigger signal and a trigger signal generating means for generating a trigger signal, and the fuel injection amount set by the fuel injection amount setting means is set by increasing or decreasing the fuel injection amount set by the fuel injection amount setting means in accordance with the increase/decrease correction amount set by the increase/decrease correction amount adjustment setting means. an adjustment increase/decrease correction means; an air-fuel ratio detection means for detecting a target air-fuel ratio of the engine intake air-fuel mixture in an engine idling operating state based on the engine exhaust component concentration; an increase/decrease correction amount storage means for storing the increase/decrease correction amount when the target air-fuel ratio is detected by the detection means; and an increase/decrease correction amount storage means for storing the increase/decrease correction amount when the target air-fuel ratio is detected by the adjustment increase/decrease correction means. idle increase/decrease correction means for increasing/decreasing the fuel injection amount set by the fuel injection amount setting means according to the increase/decrease correction amount set by the fuel injection amount setting means;
An idle air-fuel ratio adjustment device for an electronically controlled fuel injection type internal combustion engine.