Internal-combustion engines – Free piston – Single chamber; one piston
Reexamination Certificate
2005-09-13
2005-09-13
Yuen, Henry C. (Department: 3747)
Internal-combustion engines
Free piston
Single chamber; one piston
C417S364000
Reexamination Certificate
active
06941904
ABSTRACT:
A free piston engine is configured with a pair of opposed engine cylinders located on opposite sides of a fluid pumping assembly. An inner piston assembly includes a pair of inner pistons, one each operatively located in a respective one of the engine cylinders, with a push rod connected between the inner pistons. An outer piston assembly includes a pair of pistons, one each operatively located, in a respective one of the engine cylinders, with at least one pull rod connected between the outer pistons. The pull rod extends through an outer pumping chamber in the fluid pumping assembly and forms a fluid plunger within this chamber. Each outer piston cooperates with an integrated scavenge pump in order to compress the charge air, thus significantly increasing the air charge density into the engine cylinders for each stroke of the engine.
REFERENCES:
patent: 5556262 (1996-09-01), Achten et al.
patent: 6105541 (2000-08-01), Berlinger
patent: 6135069 (2000-10-01), Fenelon et al.
patent: 6279517 (2001-08-01), Achten
patent: 6314924 (2001-11-01), Berlinger
Fuqua Kevin
Hofbauer Ing. Peter
Peng Lixin
Tusinean Adrain
Ali Hyder
Ford Global Technologies LLC
Kelley David B.
MacMillan Sobanski & Todd
Yuen Henry C.
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