Internal-combustion engines – Cooling – Coolant released into cylinder or valve passages
Reexamination Certificate
2005-10-04
2005-10-04
Yuen, Henry C. (Department: 3747)
Internal-combustion engines
Cooling
Coolant released into cylinder or valve passages
Reexamination Certificate
active
06951193
ABSTRACT:
This invention provides a film-cooled internal combustion engine in which a film of gas is applied to interior surfaces of the engine to reduce heat transfer to the metal components of the engine from hot combustion gases to cause more work to be extracted from those gases, thereby raising the efficiency of the engine. In one form, this objective is achieved by reducing the temperature of the gas coming in contact with the metal parts during the power stroke of the engine by laying down a thin film of gas between the hot combustion gases and the walls of the engine. This thin film of gas creates an effectively lower film temperature-driven convection heat transfer. This invention reduces heat transfer to walls of the engine, protects hot parts, reduces knock (pre-ignition), and purges fuel from tight spaces in the engine.
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Mike Fry et al., “A Comparison of Gasoline Direct Injection Systems and Discussion of Development Techniques”, Society of Automotive Engineers, Inc., International Congress and Exposition, Detroit, Michigan, Mar. 1-4, 1999, 16 pages.
Benton Jason
Christie Parker & Hale LLP
Yuen Henry C.
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