| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an intake/exhaust device of a multi-cylinder engine which can enhance an engine output by a simple constitution. <P>SOLUTION: An aggregation part 56 connected to the downstream end of an independent exhaust passage 52 is arranged, each independent exhaust passage 52 and the aggregation part 56 are formed into shapes that negative pressure is generated in an exhaust port 18 connected to the other adjacent independent exhaust passage 52 by an executer effect, and also in shapes that a virtual face C is extended on the inside surface of the downstream end of each independent exhaust passage 52 toward a downstream side from the downstream end along a direction parallel with an axial line L2 of the downstream end separates from the inside surface of the aggregation part 56 to the inside over the upstream end of the aggregation part 56 to the downstream end, and an overlapping period of one air cylinder 12 connected with an exhaust order and a valve-opening time of an exhaust valve 20 of the other air cylinder 12 are made to overlap each other. <P>COPYRIGHT: (C)2012,JPO&INPIT |
