| 摘要 |
<p>An exhaust pulse control unit (10) for increasing exhaust manifold vacuum in an engine comprises an inlet (11), an outlet (12) and an intermediate containment zone (13). An exhaust pulse capture and expansion zone (14) is located between the inlet and intermediate zone and a merging zone (17) between the intermediate zone and the outlet. The capture and expansion zone may consist of two stages with the first stage providing a relatively rapid increase in exhaust gas volume.</p> |
