Set of coaxial engine valves - comprises conventional valve sliding in hollow stem of valve with annular head

摘要

The set of coaxial valves is designed to increase the free cross-section of the inlet or outlet port of an ic-engine. It comprises a valve (1) sliding inside a second one (2) having a hollow stem and a ring-shaped head. The ring and the hollow stem are joined by arms, to allow gas to flow through the inside.