Air-fuel ratio controlling apparatus for engine having carburetor |
|||||||
| 申请号 | JP4259884 | 申请日 | 1984-03-05 | 公开(公告)号 | JPS60187749A | 公开(公告)日 | 1985-09-25 |
| 申请人 | Toyota Motor Corp; | 发明人 | NOMURA HIROYUKI; KOMATSU ITSUO; | ||||
| 摘要 | PURPOSE:To enable to purify the exhaust gas and to increase the output of an engine over the entire operational range of the engine, by lowering the air-fuel ratio by stopping feedback control of a carburetor when a secondary throttle valve that is opened only at the time of high-load operation of the engine is operated. CONSTITUTION:When a primary throttle valve 14 of a carburetor 10 is fully opened, a secondary throttle valve 18 is opened by operating an actuator 30A by the negative pressure acted at a port 24 of a venturi 20. That the secondary throttle valve 18 is opened is detected by an opening detecting switch 36, and the output signal is applied to a control unit 42. The control unit 42 executes ordinary feedback control of a main air bleed 38, a slow air bleed 40 and a control solenoid valve 34 until the output signal of said switch 36 is applied to the control unit 42. However, when the output signal of the switch 36 is applied to the unit 42, it stops feedback control and lowers the air-fuel ratio. | ||||||
| 权利要求 | |||||||
| 说明书全文 | |||||||
QQ群二维码
意见反馈
意见反馈