| 摘要 |
A system for controlling the air-fuel ratio for an engine comprises a first passage for communicating a portion adjacent to an inlet of an air bleed of a carburetor of the engine with a portion of the intake passage between an air-cleaner and a supercharger, a valve provided in the first passage, an actuator comprising a diaphragm operatively connected to the valve and first and second chambers defined by the diaphragm. A second passage is provided for communicating the first chamber with the intake passage at the upstream side of the inlet of the air bleed, and a third passage is provided for communicating the second chamber with the intake passage at the downstream side of a throttle valve of the engine. The actuator is so arranged that the valve opens when the difference between pressures in the first and second chambers exceeds a predetermined value, thereby supplying rich air-fuel mixture.
|
