| 摘要 |
PURPOSE:To properly settle the air-fuel ratio at the time of a low temperature or acceleration after a warm-up by changing the volume of a reservoir chamber of fuel in response to the opening of a throttle valve, and opening an opening/ closing means to increase the reservoir chamber when the cooling water temperature is low. CONSTITUTION:When a rod 29 connected to a throttle valve is moved, a pin 33 pushes a diaphragm 28, and the volume of a reservoir chamber 27 of fuel is increased or decreased. A chamber 34 above the diaphragm 28 is communicated to a negative-pressure manifold via a passage 38. A valve (opening/closing means) 39 cuts off the passage 38 when the cooling water temperature rises. When the manifold negative pressure is applied to the chamber 34 through the passage 38, the volume of the reservoir chamber 27 is increased. When the passage 38 is closed, the throttle opening and the diaphragm 28 are interlocked at the opening position after a lever 31 and the pin 33 are brought into contact with each other. The fuel discharge is increased at the time of a low temperature and acceleration after a warm-up, and the air-fuel ratio is made optimum. |
