JPS59116545U

JPS59116545U - Air-fuel ratio control device for internal combustion engines

Info

Publication number: JPS59116545U
Application number: JP1004283U
Authority: JP
Inventors: 沢田　和久; 薫宇野
Original assignee: トヨタ自動車株式会社
Priority date: 1983-01-28
Filing date: 1983-01-28
Publication date: 1984-08-06

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 the drawing]

第１図は本考案に係る内燃機関の空燃比制御装置を示す
概要図、第２図は第１図の制御回路の詳細な回路図であ
る。１：機関本体、２：キャブレタ、１０：制御回路、１２
：混合気調整用電磁弁、１３：負圧スイッチ、１５：２
次空気調整用電磁弁、１６：０□センサ、１７：三元触
媒コンバータ、１８：排気温センサ、１０２：比較回路
、１０３：第１の積分回路、１０４：第２の積分回路、
１０３１：両方向性積分定数決定回路、１０３２：スキ
ップ量決定回路。FIG. 1 is a schematic diagram showing an air-fuel ratio control device for an internal combustion engine according to the present invention, and FIG. 2 is a detailed circuit diagram of the control circuit shown in FIG. 1. 1: Engine body, 2: Carburetor, 10: Control circuit, 12
: Solenoid valve for mixture adjustment, 13: Negative pressure switch, 15:2
Next air adjustment solenoid valve, 16: 0□ sensor, 17: three-way catalytic converter, 18: exhaust temperature sensor, 102: comparison circuit, 103: first integral circuit, 104: second integral circuit,
1031: Bidirectional integral constant determining circuit, 1032: Skip amount determining circuit.

Claims

[Claims for Utility Model Registration] 1. A concentration sensor for detecting the concentration of a specific component in the exhaust gas of an internal combustion engine, a comparison circuit for comparing the output of the concentration sensor with a predetermined value, and a comparison circuit for comparing the output of the concentration sensor with a predetermined value. first and second integrating circuits having different integration directions depending on the output, and an intake air for feedback controlling the air-fuel ratio of the air-fuel mixture supplied to the intake system of the engine depending on the output of the first integrating circuit. system feedback control means; and exhaust system feedback control means for feedback-controlling the amount of secondary air supplied to the exhaust system of the engine according to the output of the second integral circuit. In the air-fuel ratio control device for an internal combustion engine, the exhaust system feedback control means is stopped in accordance with a predetermined operating condition, the skip for skipping the output level of the first integral circuit in accordance with the predetermined operating condition. 1. An air-fuel ratio control device for an internal combustion engine, comprising: means. 2. The utility model registration according to claim 1, wherein the skip means includes a skip amount determining circuit that is connected to the bidirectional integral constant determining circuit of the first integrating circuit and operates according to the predetermined operating conditions. air-fuel ratio control device for internal combustion engines. 3. The air-fuel ratio control device for an internal combustion engine according to claim 1, wherein the predetermined operating conditions are an intake pressure and an exhaust temperature of the engine.