| 摘要 |
<p>A manifold (10) for a bank of four cylinders of an engine, comprises four primary tracts (20, 22) each leading to a respective cylinder and two secondary tracts (24, 26) each connected at a respective one of two branching points (16, 18) to a respective pair of primary tracts (20, 22) which lead to cylinders of which the combustion cycles are in antiphase. The two branching points (16, 18) are arranged adjacent one another to form a decoupling chamber within which there is disposed a valve (30) connecting the two branching points. The resonant frequency of the manifold can be changed by opening and closing the valve (30).</p> |
