Compound combustion expansion internal combustion engine

Details Compound combustion expansion internal combustion engine Compound combustion expansion internal combustion engine

1998-11-03

2000-03-14

Yuen, Henry C.

Internal-combustion engines

Adjustable combustion chamber

Piston in head adjusted

123 78AA, F02B 7504

Patent

active

060358149

ABSTRACT:
An internal combustion engine in one embodiment includes a number of cylinders each having a crank piston connected to an engine crankshaft and disposed within a combustion chamber. Each cylinder includes a valve seat projecting inward from cylinder wall offset from the top dead center position of the crank piston. A free piston is slidingly disposed within the cylinder between the head end and the valve seat. The free piston has an outer diameter that is less than the inner diameter of the cylinder to permit leakage of combustion gas past the free piston. The free piston also includes a lower face opposing the crank piston with an annular groove defined in the lower face configured for sealing engagement with the valve seat. The free piston defines a pressure chamber that is pressurized during the by combustion process when the free piston is disposed apart from the valve seat.

REFERENCES:
patent: 1467734 (1923-09-01), MacLachlan
patent: 1474954 (1923-11-01), Brown
patent: 2444108 (1948-06-01), Norton

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