| 摘要 |
PURPOSE:To feed an air-fuel mixture with oombustible concentration to an engine at the time of deceleration by opening a passage applying the manifold negative pressure to a negative pressure chamber at the time of deceleration. CONSTITUTION:A negative pressure guiding passage 19 applying the manifold negative pressure to a negative pressure chamber 10 and an opening/closing control means 20 opening this passage at the time of deceleration are provided in a pressure balance type fuel injection device. When an engine brake is applied for deceleration from the acceleration state, a throttle valve 4 is decreased to idle opening, and the air flow is decreased. The opening/closing control means 20 opens the passage 19 at this time, the increased manifold negative pressure is applied to the negative pressure chamber 10, the pressure difference from an atmospheric pressure chamber 12 is increased, and the fuel discharge quantity is increased. The concentration of the air-fuel mixture fed to an engine is increased, afterburning can be prevented, the fuel stuck on the wall face of a manifold is not evaporated, thus the subsequent acceleration can be smoothly performed. |
