Apparatus for external cooling of an exhaust valve

Details Apparatus for external cooling of an exhaust valve Apparatus for external cooling of an exhaust valve

1979-02-02

1981-10-27

Haroian, Harry N.

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

F01L 134

Patent

active

042967155

ABSTRACT:
This invention relates to a method and devices for improving the external cooling of an exhaust valve of internal combustion engines. This method consists in extending the open period of the exhaust valve beyond the normal closing instant by preventing it from closing completely at that instant but by reducing the free flow section between the valve and its seat to a residual value which is substantially constant and small compared to the maximum flow section corresponding to the full opening of the valve. Said devices comprise means for obtaining such residual opening of the exhaust valve.

REFERENCES:
patent: 2647500 (1953-08-01), Lang
patent: 2862485 (1958-12-01), Skinner
patent: 3786792 (1974-01-01), Pellizzoni et al.

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