JPS5827562U

JPS5827562U - Air-fuel ratio control device for internal combustion engines

Info

Publication number: JPS5827562U
Application number: JP11422381U
Authority: JP
Inventors: 水谷　光一; 豊長谷川; 北野　信明; 蒲野　和幸; 勇太田
Original assignee: トヨタ自動車株式会社
Priority date: 1981-07-31
Filing date: 1981-07-31
Publication date: 1983-02-22
Also published as: JPS624678Y2

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、従来の空燃比制御における、通常時とアイド
ルアップ時の空燃比制御状態の一例を示　　′す線図、
第２図は、アイドルアップ時に適合した空燃比制御にお
ける、アイドルアップ時と通常時　　　　−の空燃比制
御状態の一例を示す線図、第３図は、本考案に係る内燃
機関の空燃比制御装置の実施例の構成を示す、一部ブロ
ック線図を含む断面図である。１２・・・気化器、１６・・・絞り弁、１８・・・吸気
マ三ホルト、２０・・・排気マニホルド、３６・・・酸
素濃度センサ、３８・・・二次空気供給弁、４２・・・
二次空気供給通路、４６・・・電磁弁、４Ｂ・・・電子
制御回路、６０・・・二次空気供給ジェット、６４・・
・電磁弁、６６・・・クーラアンプ。FIG. 1 is a diagram illustrating an example of air-fuel ratio control states during normal and idle up periods in conventional air-fuel ratio control.
FIG. 2 is a diagram showing an example of air-fuel ratio control states during idle-up and normal times in air-fuel ratio control suitable for idle-up, and FIG. 3 is an air-fuel ratio control system for an internal combustion engine according to the present invention. FIG. 2 is a cross-sectional view including a partial block diagram, showing the configuration of an embodiment of the present invention. DESCRIPTION OF SYMBOLS 12... Carburizer, 16... Throttle valve, 18... Intake manifold, 20... Exhaust manifold, 36... Oxygen concentration sensor, 38... Secondary air supply valve, 42...・・・
Secondary air supply passage, 46... Solenoid valve, 4B... Electronic control circuit, 60... Secondary air supply jet, 64...
・Solenoid valve, 66...Cooler amplifier.

Claims

[Scope of utility model registration request]

A carburetor that forms a mixture with a base air-fuel ratio that is richer than the stoichiometric air-fuel ratio, an oxygen concentration sensor that detects the residual oxygen concentration in exhaust gas, and a secondary air-fuel mixture that supplies secondary air to the exhaust system or intake system. By supplying secondary air to the exhaust system or the intake system according to the residual oxygen concentration in the exhaust gas, the secondary air-fuel ratio in the exhaust system is maintained close to the stoichiometric air-fuel ratio. In the air-fuel ratio control device for an internal combustion engine, a secondary air supply jet is provided in the intake system, and when the throttle valve of the carburetor is opened due to idle up, air is supplied from the secondary air supply jet. An air-fuel ratio control device for an internal combustion engine, characterized by supplying secondary air to an intake system.