| 摘要 |
PURPOSE:To sufficiently increase engine rpm with use of a miniature solenoid valve by providing an on-off valve for opening and closing an auxiliary path opened from a constant oil level chamber to the downstream side of a throttle valve on an intake air path, and opening said on-off valve when the solenoid valve provided on the auxiliary path is opened. CONSTITUTION:An auxiliary upstand part 16 is vertically provided downwardly of a vertical part 8a located on the upstream side from a solenoid valve 10 within a upstand part 8 on the side of a delivery port 11, in an auxiliary path 12 from an inlet 2 of a constant oil level chamber 1 to the delivery port 11 on the downstream side of a throttle valve 14 in an intake air path 13. In addition, a connection opening is formed between the auxiliary upstand part 16 and a vertical part 8b on the downstream side from the solenoid valve 10 of the upstand part 8, and a valve seat 17 is provided at this opening position. An on-off valve 21 is provided, while being composed of a valve body 19 for opening and closing the path 18 of the valve seat 17 and a valve rod 20 penetrating the path 18. Hereby, when any electric load such as a cooler, etc., is applied to an engine in idling operation thereof, the auxiliary path 12 is opened at two positions of the solenoid valve 10 and the on-off valve 21, and hence mixture gas can sufficiently be supplied to the engine. |
