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
【課題】サクションピストンにスロットルバルブの機能を持たせ、より小型化することが可能なエンジンの吸気装置を提供する。 【解決手段】燃焼室の吸気に伴って減圧される負圧室14hと当該負圧室の圧力に対して基準となる基準圧室14gとを有する差圧発生部と、弾性部材14mにて吸気通路内の開口面積を減少させる付勢方向に付勢されているとともに前記負圧室と基準圧室との差圧に応じて吸気通路内の開口面積を増大させる吸引方向に吸引されるサクションピストン14bとを、燃焼室に連通する吸気通路に設けたエンジンの吸気装置であって、前記差圧に応じてサクションピストン14bが吸引方向に移動する距離を、少なくとも運転者からのアクセル操作量に基づいて規制するピストン規制部材14qを備える。 【選択図】 図2




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