| 摘要 |
PURPOSE:To provide a throttle chamber attaching part structure of an intake manifold, wherein any edge tone is not generated in the initial opening period of a throttle valve in idling of an engine. CONSTITUTION:A throttle chamber attaching part structure is an attaching part structure of an air supplying passage 12 of an intake manifold 11 to a throttle chamber 15 provided with an intake passage 16. In this throttle chamber, an auxiliary air passage 17 opening to the attaching part is provided, and a throttle valve 19 for opening/closing the intake passage 16 is provided near the auxiliary air passage 17, and the opening part 12a of the air supplying passage 12 of the intake manifold is formed into a step shape a little larger than the opening part 16a of a suction passage 16 of the throttle chamber. |
