| 摘要 |
<p>PURPOSE:To generate high-output torque over a wide rotating range by providing multiple suction chambers for each cylinder in which opening timings of suction valves are not overlapped and selectively connecting the suction chambers in response to the operation state. CONSTITUTION:A suction device having a suction manifold body 41 partitioned into a pair of suction chambers 43 and 44 with a bulkhead 42 and a throttle body 45 connected on its upstream side is provided in a four-cylinder internal combustion engine with a valve system changing the opening/closing timing of at least one of a suction valve and an exhaust valve in response to the operation state. The suction chambers 43 and 44 are connected to combustion chambers of two cylinders 50, 53 and 51, 52 in which opening timings of suction valves are not overlapped via suction passages 54, 57 and 55, 56. Multiple openings 59 communicating both suction chambers 43 and 44 are formed on a bulkhead 42, and a switching control valve 60 is provided on each opening respectively. The switching control valve 60 is controlled in response to the transition of the rotating speed of an engine.</p> |
