JPH0169147U

JPH0169147U -

Info

Publication number: JPH0169147U
Application number: JP1987164261U
Authority: JP
Priority date: 1987-10-27
Filing date: 1987-10-27
Publication date: 1989-05-08

Description

[Brief explanation of the drawing]

第１図は本考案に係る気化器付エンジンの制御
装置の一例を、それが適用されたエンジンととも
に示す概略構成図、第２図は第１図に示される例
の動作説明に供される特性図、第３図は第１図に
示される例においてコントロールユニツトにマイ
クロコンピユータが用いられた場合における、斯
かる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である。図中、２０は吸気通路、３０は気化器、３２は
スロツトル弁、３５はリニア酸素センサ、４０は
共通通路、４２は三方切換弁、４４は補助空気通
路、４６は排気還流通路、５１は流量調整弁、５
３は通路開閉弁、１００はコントロールユニツト
、である。 FIG. 1 is a schematic configuration diagram showing an example of a control device for a carburetor-equipped engine according to the present invention, together with an engine to which it is applied, and FIG. 2 is a characteristic diagram for explaining the operation of the example shown in FIG. 3 are flowcharts showing an example of a program executed by a microcomputer in the case where a microcomputer is used as the control unit in the example shown in FIG. In the figure, 20 is an intake passage, 30 is a carburetor, 32 is a throttle valve, 35 is a linear oxygen sensor, 40 is a common passage, 42 is a three-way switching valve, 44 is an auxiliary air passage, 46 is an exhaust recirculation passage, and 51 is a flow rate. Adjustment valve, 5
3 is a passage opening/closing valve, and 100 is a control unit.

Claims

[Scope of utility model registration request]

a carburetor disposed in the intake passage of the engine to supply fuel; a common passage having one end connected to a downstream portion of the intake passage from the throttle valve;
an auxiliary air passage whose one end is substantially open to the atmosphere, an exhaust recirculation passage whose one end is connected to the exhaust system of the engine, and the other ends of the common passage, the auxiliary air passage, and the exhaust recirculation passage are connected, respectively; a three-way switching valve that selectively assumes a first state in which the common passage and the auxiliary air passage communicate with each other and a second state in which the common passage and the exhaust gas recirculation passage communicate with each other; switching valve control means for causing the engine to take the first state when the engine is in a steady state and for taking the second state when the engine is accelerating; and the intake passage through the auxiliary air passage and the common passage. or the amount of exhaust gas supplied to the intake passage through the exhaust gas recirculation passage and the common passage,
A control device for a carburetor-equipped engine, comprising: a flow rate regulating valve that adjusts according to the operating state of the engine.