| 摘要 |
PURPOSE:To prevent fuel particles inside a suction pipe from penetrating into the side of a controller as well as to secure normal actuation of the controller, by setting up a check valve, checking a flow of fuel from the suction side to the controller side, in a suction pressure outlet part. CONSTITUTION:An internal-combustion engine 10 is provided with a starting fuel increment device 25 and a thermal control valve 26. A connection pipe 37 to which one end of piping 27 is connected is attached to a suction pressure outlet part 21A of a suction pipe 21, while two check valves are set up inside the connection pipe 37. These check valves are opened by a pressure wave at the counter positive pressure side of suction pressure pulsation inside the suction pipe 21 and allow a flow of fuel from the side of the thermal control valve 26 to the suction pipe 21 but check the suction pressure inside the suction pipe 21 flowing to the side of the thermal control valve 26. Thus, fuel particles inside the suction pipe are prevented from penetrating into the controller side and normal actuation of the controller can be secured. |
