JPS59103873U

JPS59103873U - engine control circuit

Info

Publication number: JPS59103873U
Application number: JP20029282U
Authority: JP
Inventors: 片山　泰臣; 猪俣　基; 谷口　俊之
Original assignee: 日本電気ホームエレクトロニクス株式会社
Priority date: 1982-12-28
Filing date: 1982-12-28
Publication date: 1984-07-12
Also published as: JPH0130598Y2

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図は本考案によるエンジン制御回路の一実施例を示
す回路図、第２図は第１図に示す三角波発生回路の具体
例を示す回路図、第３図ａ、　　ｂは第１図に示す回路
の動作波形図である。１・・・エンジン制御ユニット、２・・・基準信号発生
回路、３．　４．　８．　１０・・・アンドゲート、５
．９・・・インバータ、６．１３・・・オアゲート、１
１・・・三角波発生回路、１２・・・コンパレータ。FIG. 1 is a circuit diagram showing an embodiment of the engine control circuit according to the present invention, FIG. 2 is a circuit diagram showing a specific example of the triangular wave generating circuit shown in FIG. 1, and FIGS. 3a and 3b are the same as in FIG. FIG. 3 is an operation waveform diagram of the circuit shown in FIG. 1... Engine control unit, 2... Reference signal generation circuit, 3. 4. 8. 10...and gate, 5
．． 9...Inverter, 6.13...Or gate, 1
1... Triangular wave generation circuit, 12... Comparator.

Claims

[Scope of utility model registration request]

Generates an ignition control signal and a fuel control signal by capturing and processing at least a reference position pulse indicating a reference position wave of the crankshaft, a crank angle pulse generated every unit angular rotation of the crankshaft, and an intake negative pressure signal. an engine control unit using a microcomputer that generates a failure signal from an internal failure detection circuit in the event of a failure, and a reference signal generation circuit that generates a fixed ignition position signal using the reference position pulse and crank angle pulse. a selector that selects the ignition control signal during normal times and selects and extracts the ignition position signal when the fault signal occurs to supply it to the ignition device as an ignition signal, and only when the fault signal does not occur; a first gate circuit that takes out the fuel control signal;
a triangular wave generation circuit that generates a triangular wave signal triggered by the ignition position signal only when the failure signal occurs; a comparator that compares the triangular wave signal and the intake negative pressure signal; and an output of the first gate circuit and the An engine control circuit comprising: a second gate circuit that calculates a logical sum with the output of a comparator and supplies the output signal to a fuel injection valve drive circuit as a fuel injection control signal.