Cam device

Details Cam device Cam device

1995-06-07

1997-04-01

Marmor, Charles A.

Machine element or mechanism

Elements

Cams

123 9031, 123 906, F01L 104

Patent

active

056155867

ABSTRACT:
In internal combustion engine (10) having a power shaft (12) mounted in an engine block (11) for rotation about a power shaft axis (X), a valve arrangement (20) for controlling intake to and exhaust from a combustion chamber (20), and a cam device (22) for actuating the valve arrangement (20); the cam device (22) includes a ring cam (24) having a generally ring-shaped body, with the body having an inner peripheral surface (35) and an outer peripheral surface (26). The ring cam (24) is mounted to the engine block (11) for rotation about a cam axis (Y) displaced from the power shaft axis (X). A cam surface (32) or (34) is provided on the outer peripheral surface (26) for actuating the valve arrangement (20) as the ring cam (24) is rotated about the cam axis (Y). A gear (38) is operably engaged with the power shaft (12) and nested inside the inner peripheral surface (35) for driving the ring cam (24). A gear (36) is provided on the inner peripheral surface (35) for being driven by the gear (38) to rotate the ring cam (24) about the cam axis (Y). A pair of cam followers (28) and (30) are received in an elongated aperture (66) having a non-circular cross-section formed in the engine (10), and are driving by the for sliding, linear motion relative to each other and the engine block (11) by the ring cam (24).

REFERENCES:
patent: 1312577 (1919-08-01), Redrup
patent: 2081390 (1937-05-01), Trapp
patent: 3045503 (1962-07-01), Kiessling
patent: 3339670 (1967-09-01), McGrew, Jr. et al.
patent: 3886805 (1975-06-01), Koderman
patent: 4595556 (1986-06-01), Umeha et al.
patent: 5215164 (1993-06-01), Shibata

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