High efficiency combustion chamber system

Details High efficiency combustion chamber system High efficiency combustion chamber system

1992-12-23

1994-05-24

Nelli, Raymond A.

Internal-combustion engines

Combustion chamber having multiple spark gaps

F02P 1502

Patent

active

053139216

ABSTRACT:
An intake and exhaust system for use with internal combustion engines that uses two intake valves and one exhaust valve for each engine cylinder. The three valves are preferably round and spaced substantially uniformly in the cylinder head around the cylinder centerline. For best results, the two intake valves have substantially equal diameters, with the diameter of the exhaust valve having a ratio to the diameter of an intake valve of from about 1:1 to about 1:1.2. Preferably one axial, three peripheral or an axial and three peripheral spark plugs equally spaced around the cylinder axis each centrally located in one of the areas between adjacent valves and the edge of the cylinder. The head has three substantially hemispheric depressions each housing one of said valves. This invention provides a fast and uniform lean burn, permits use of a high compression ratio and lower octane, unleaded gasoline and provides improved thermal efficiency.

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patent: 4421081 (1983-12-01), Nakamura et al.
patent: 4452198 (1984-06-01), Berland
patent: 4702804 (1988-05-01), Suzuki et al.

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