INTAKE SYSTEM OF ENGINE

PROBLEM TO BE SOLVED: To provide an intake system capable of being miniaturized by providing a function of a throttle valve to a suction piston. SOLUTION: In the intake system, a differential pressure generating part having a negative pressure chamber 14h reduced in pressure accompanied by the intake of a combustion chamber and a reference pressure chamber 14g which is a reference with respect to the pressure of the negative pressure chamber, and a suction piston 14b urged in the urging direction to reduce the opening area in the intake passage with an elastic member of 14m, while being sucked in the suction direction to increase the opening area in the suction passage corresponding to the differential pressure between the negative pressure chamber and the reference pressure chamber are installed in the suction passage communicating to the combustion chamber. The intake system is provided with a piston restricting member 14q to restrict the distance in which the suction piston 14b moves in the suction direction corresponding to the differential pressure depending on the acceleration operation amount at least from a driver. COPYRIGHT: (C)2006,JPO&NCIPI