| 摘要 |
PURPOSE: Structure of a throttle body is provided to reduce the intake noise during idling and to improve reliability on the motion of an idle speed actuator by spacing the idle speed actuator apart from the outlet of an evaporating pipe. CONSTITUTION: An intake port(2) and an evaporating pipe(16) are connected to a surge tank(1). A throttle body(3) is formed on the intake port, and a throttle valve(4) for selectively opening the intake port is formed inside the throttle body. A bypass pipe(5) for connecting the intake port with the surge tank is combined to the outer side of the throttle body. A flow hole(6) for connecting the bypass pipe with the intake port is formed in the throttle body. An inlet(6a) of the flow hole is formed slantingly, parallel to the advancing direction of intake air. Herein, the flow velocity of the intake air passing through the flow hole is reduced. Even if evaporation gas is supplied into the surge tank, a speed actuator(7) is protected from the evaporation gas.
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