| 摘要 |
PURPOSE:To highten reliability in suction leading performance, by connecting a negative pressure on-off valve, being opened or closed in time of water lock happening, to a negative pressure leading route leading to an actuator of a control valve which opens or closes a preheating suction intake part, in case of a suction device provided with a suction preheating system. CONSTITUTION:In this suction preheating system a suction intake part 7 having a suction preheating part in addition is connected to a preheating suction intake part 8 inside an air horn 5, and the preheating suction intake part 8 is opened or closed by a control valve 12 driven by an actuator 13 making suction pipe pressure of a suction manifold 6 a driving source. A feeler valve 10 installed inside an air cleaner 1 is interposingly installed in position between negative pressure leading hoses 11 and 14 leading to the actuator 13. At the abovementioned, an interval between the inside of the air cleaner 1 and the hose 14 is connected with a hose 17 in which a negative pressure on-off valve 15 is installed. This negative pressure on-off valve 15 is constituted so as to be opened when internal pressure of the air cleaner 1 comes to water lock corresponding pressure. |
