| 摘要 |
PROBLEM TO BE SOLVED: To provide a suction device of an internal combustion engine to adjust the suction air flow by structuring so that an opening/closing valve is installed in a suction passage to supply the suction air flow to the cylinder side of the internal combustion engine, whereby capable of suppressing a turbulence of the suction air flow generated by the void of the valve opening when the opening/closing valve is in open condition.SOLUTION: The suction device of the internal combustion engine including the opening/closing valve 1 to adjust the suction air flow in the suction passage, is configured so that the opening/closing valve 1 is equipped with the opening 3 to open so as to put the upstream of the valve 1 in communication with the downstream in a condition that the valve is closed so as to close the suction passage, and an auxiliary valve 4 provided to the opening 3 of the valve 1, wherein the auxiliary valve 4 is provided to the opening 3 to be opened and closed so as to open the opening 3 when the valve 1 is in the closed condition and to close the opening when the valve 1 is in the open condition. |
