JPH01134749U

JPH01134749U -

Info

Publication number: JPH01134749U
Application number: JP3027888U
Authority: JP
Priority date: 1988-03-09
Filing date: 1988-03-09
Publication date: 1989-09-14

Description

[Brief explanation of the drawing]

第１図は本考案の構成を示す機能ブロツク図、
第２図は本考案の一実施例を示すシステム図、第
３図及び第４図は同上実施例における制御内容を
示すフローチヤート、第５図は従来の問題点を説
明するための冷却水温度と潤滑油温度との関係を
示すグラフである。１…機関、６…燃料噴射弁、１４…コントロー
ルユニツト、１５…スロツトルセンサ、１６…ア
イドルスイツチ、１７…クランク角センサ、１８
…水温センサ、２０…Ｏ_２センサ。 Figure 1 is a functional block diagram showing the configuration of the present invention.
Fig. 2 is a system diagram showing an embodiment of the present invention, Figs. 3 and 4 are flowcharts showing control details in the above embodiment, and Fig. 5 is a cooling water temperature diagram to explain the conventional problems. It is a graph which shows the relationship between and lubricating oil temperature. DESCRIPTION OF SYMBOLS 1... Engine, 6... Fuel injection valve, 14... Control unit, 15... Throttle sensor, 16... Idle switch, 17... Crank angle sensor, 18
...Water temperature sensor, 20... _O2 sensor.

Claims

[Scope of Claim for Utility Model Registration] Engine operating state detection means for detecting the engine operating state; and basic fuel injection amount setting means for setting the basic fuel injection amount based on the engine operating state detected by the engine operating state detection means. , air-fuel ratio detection means for detecting engine exhaust components and thereby detecting the air-fuel ratio of the engine intake mixture; and comparing the air-fuel ratio detected by the air-fuel ratio detection means with a target air-fuel ratio to determine the actual air-fuel ratio. Feedback correction value setting means for setting a feedback correction value for correcting the basic fuel injection amount so as to approach the target air-fuel ratio, and setting the feedback correction value in the feedback correction value setting means to a predetermined clamp value in a predetermined idling operating state. Feedback correction value clamping means for clamping, cooling water temperature detection means for detecting the temperature of engine cooling water, and varying the predetermined clamp value according to the cooling water temperature detected by the cooling water temperature detection means at the time of starting the engine. a clamp value setting means to set, the basic fuel injection amount set by the basic fuel injection amount setting means, and the feedback correction value set by the feedback correction value setting means or the feedback correction value clamped by the feedback correction value clamping means. a fuel injection amount setting means for setting a fuel injection amount based on the fuel injection amount; and a fuel injection device that injects fuel into the engine on and off in response to a drive pulse signal corresponding to the fuel injection amount set by the fuel injection amount setting means. An air-fuel ratio feedback control device for an internal combustion engine, comprising: means;