| 摘要 |
The manifold and cylinder head structures of an internal combustion engine are provided with fluid flow passageways extending from the manifold plenum to the valve ports of the engine cylinders, with fluid flow control members disposed in the passageways and defining peripheral restrictions therein. In some modifications the members are integrally formed in a gasket sandwiched between the manifold and the cylinder head and having openings registered with the passageways, which openings have a cross sectional area less than the passageway cross sectional areas. In some modifications the insert members are elongated and increase in cross sectional area from the upstream to the downstream ends. In some modifications, each insert member has an integral flange at either end or intermediate the ends, the flange being retained between the manifold and the cylinder head. In some modifications a plurality of members are formed integrally in a single gasket element sandwiched between the manifold and the cylinder head. In some modifications, the insert members are integral with the manifold or with the cylinder head port runners. In some modifications, the intake passageway insert members are press fit or otherwise secured closely adjacent the intake ports. |
