JPH02127753U

JPH02127753U -

Info

Publication number: JPH02127753U
Application number: JP3754289U
Authority: JP
Priority date: 1989-03-31
Filing date: 1989-03-31
Publication date: 1990-10-22

Description

[Brief explanation of drawings]

第１図は本考案を実用新案登録請求の範囲に対
応して示す基本構成図、第２図は本考案に係るエ
ンジンの燃料噴射制御装置の一例を示す概略構成
図、第３図は第２図に示されるコントロールユニ
ツトにマイクロコンピユータが実行するプログラ
ムの一例を示すフローチヤート、第４図は第２図
に示される例の動作説明に供される特性図、第５
図及び第６図は、夫々、吸入空気量について設定
される上限値の説明に供される特性図である。１０……エンジン、１８……スロツトル開度セ
ンサ、２０……ホツトワイヤ式エアフローセンサ
、２５……燃料噴射弁、３０……（エンジン）回
転数センサ、３５……バツテリ、１００……コン
トロールユニツト。 Fig. 1 is a basic configuration diagram showing the present invention corresponding to the scope of the utility model registration claims, Fig. 2 is a schematic configuration diagram showing an example of an engine fuel injection control device according to the invention, and Fig. 3 is a basic configuration diagram showing an example of an engine fuel injection control device according to the invention. A flowchart showing an example of a program executed by a microcomputer on the control unit shown in the figure; FIG. 4 is a characteristic diagram for explaining the operation of the example shown in FIG. 2;
6 and 6 are characteristic diagrams for explaining the upper limit value set for the intake air amount, respectively. DESCRIPTION OF SYMBOLS 10...Engine, 18...Throttle opening sensor, 20...Hot wire type air flow sensor, 25...Fuel injection valve, 30...(engine) rotation speed sensor, 35...Battery, 100...Control unit.

Claims

[Scope of utility model registration request]

In an engine fuel injection control device that controls the amount of fuel injection by measuring the amount of intake air based on the output of a hot wire air flow sensor disposed in the intake passage of the engine, there is a fuel injection means for supplying fuel to the engine. , a first fuel calculation means that calculates the fuel injection amount based on the detection signal from the hot wire airflow sensor, a detection signal from the engine rotation speed detector, a detection signal from the throttle opening detector, and an intake air flow sensor. a second fuel calculation means for calculating a fuel injection amount based on at least two detection signals from the pipe pressure detector;
power supply voltage detection means for detecting the power supply voltage of the engine; and when the voltage detected by the power supply voltage detection means is below a predetermined value, the means for determining the fuel injection amount is changed from the first fuel calculation means to the second fuel calculation means; 1. A fuel injection control device for an engine, comprising: switching means for switching between the two modes.