Internal-combustion engines – Free piston – Single chamber; one piston
Patent
1999-02-22
2000-11-28
McMahon, Marguerite
Internal-combustion engines
Free piston
Single chamber; one piston
F02B 7100
Patent
active
061520918
ABSTRACT:
A method of operating a free piston engine with a housing including a combustion cylinder and a second cylinder. A piston includes a piston head reciprocally disposed within the combustion cylinder, a second head reciprocally disposed within the second cylinder, and a plunger rod interconnecting the piston head with the second head. The second head and the second cylinder define a variable volume pressure chamber on a side of the second head generally opposite the interconnecting plunger rod. The piston is moved between a bottom dead center position and a top dead center position during a compression stroke. A fuel and air mixture is combusted in the combustion cylinder when the piston is at or near the top dead center position. The piston is moved between the top dead center position and the bottom dead center position during a return stroke. A hydraulic accumulator is coupled with the pressure chamber during the return stroke. A pressure output from the pressure chamber to the hydraulic accumulator is varied during the return stroke, dependent upon when the hydraulic accumulator is coupled with the pressure chamber during the return stroke.
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TU Dresden--publication date unknown--earliest date 1993, Dresden University in Germany.
Bailey Brett M.
Berlinger Willibald G.
Caterpillar Inc.
McMahon Marguerite
Taylor Todd T.
LandOfFree
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