| 摘要 |
An induction system for an internal combustion engine includes an intake port in the cylinder head of the engine with this intake port having a straight cylindrical wall portion terminating at an angular valve seat and, a high-swirl intake valve cooperating therewith to control the direction of flow of an induction charge into the associated combustion chamber of the engine. The high-swirl intake valve includes a head with a valve stem upstanding from the backside thereof and further includes means associated with the backside of the valve head to define a flow passage for an induction charge. This means includes a rim shroud upstanding from the back of the valve head for an angular extent of at least 180 DEG to define the inlet opening for this flow passage and spaced apart directional vanes upstanding from the remaining portion of the valve back and, a semi-circular disc fixed to the top edge of these directional vanes so as to define the discharge outlet for this flow passage. The directional vanes are so located on the valve back whereby to effect a desired direction of flow out through this discharge opening. The outside diameter of the means defining this flow passage is slightly less than the inside diameter of the cylindrical wall portion of the intake port so as to be slidably received therein. Anti-rotation means are associated with the cylinder head and the high-swirl intake valve to prevent rotation of the latter.
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