Two-cycle engine with offset piston ovality

Details Two-cycle engine with offset piston ovality Two-cycle engine with offset piston ovality

1988-09-26

1989-09-12

Okonsky, David A.

Internal-combustion engines

Particular piston and enclosing cylinder construction

Cylinder detail

123 65R, 92177, F16J 100

Patent

active

048649864

ABSTRACT:
In a two-cycle internal combustion engine (10), the piston (20) has an outer peripheral oval shape (58) with a minor axis (62) offset from the centerline (54) of the wrist pin (26) towards a line (56) through the intake and exhaust ports (16 and 18). The outer peripheral shape of the piston also has increasing ovality, from at least the wrist pin (26) upwardly to at least the piston rings (22, 24).

REFERENCES:
patent: 3943908 (1976-03-01), Kubis et al.
patent: 4383508 (1983-05-01), Irimajiri et al.
"Experimental Method of Determining Piston Profile By Use of Composite Materials", Toshiro Yagi et al., SAE Passenger Car Meeting, Troy, Michigan, Jun. 7-10, 1982, 820769, pp. 1-9, 0148-7191/82-0607-0769.

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