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US 4,905,658 AGranted
Method of operating I.C. engines and apparatus thereof
OwnerWilliam C. Pfefferleinventor
Life of this patent
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Abstract
Operation of in-cylinder fuel injected internal combustion engines is improved by use of exhaust valves having an effective ignition catalyt on the valve face. In operation of the engine, fuel is injected into air and ignited by contact with the valve face prior to top dead center.
Claims15
An exhaust valve for an unthrottled internal combustion engine in which the surface of the valve face comprises an effective ignition catalyst.
The method of operating an unthrottled internal combustion engine comprising:
- a. Injecting fuel into compressed air prior to top dead center,
- b. Contacting said fuel with the catalytic surface of a hot exhaust valve face, and
- c. thereby combusting said fuel and producing a combustion pressure wave in the immediate vicinity of top dead center.
Dependencies are inferred from the claim text.