| 摘要 |
<p>An intake system for an internal combustion engine has a plurality of intake tracts (10, 12, 14 and 16) connected in use to extend from indidvidual engine intake ports to a common plenum chamber (18) and a common passage (20) opening into the plenum chamber for supplying air to all the intake ports. The tracts (10-16) are arranged to open into the plenum chamber (18) in pairs associated with intake ports of which the intake valve events do not overlap, the ends of each pair of tracts disposed within the plenum chamber (18) being arranged directly facing one another and being separated by a gap (22) which is sufficiently wide to permit mass air flow between the respective tracts and the common passage (20) but which is sufficiently narrow to couple most of any pressure wave energy emanating from one tract directly into the other tract.</p> |
