Valve mechanisms

Details Valve mechanisms Valve mechanisms

1989-05-05

1990-02-06

Rivell, John

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 902, 123 9039, 251238, F01L 130

Patent

active

048981303

ABSTRACT:
A valve mechanism includes a poppet type valve, a valve lever pivotally mounted at one end and attached at the other end to the end of the stem of the valve, the valve lever defines a track in which is located a drive pin and a drive mechanism is arranged to drive the drive pin in oscillatory manner; the track has a first portion which, when the valve is closed is engaged by the drive pin and coincides with the path of the drive pin, and a second portion which diverges from the path of the drive pin so that when engaged by the drive pin movement of the drive pin will cause the valve lever to move, opening and closing the valve. Preferably the mean position of oscillation of the drive pin is adjustable so that the duration and amplitude of valve opening may be varied.

REFERENCES:
patent: 1107963 (1914-08-01), Kind
patent: 2773490 (1956-12-01), Miller
patent: 2878796 (1959-03-01), Mannerstedt
patent: 2954017 (1960-09-01), Forstner
patent: 3138038 (1964-06-01), Scherenberg et al.
patent: 3911879 (1975-10-01), Altmann
patent: 4475496 (1984-10-01), Sugahara
patent: 4572118 (1986-02-01), Baguena
patent: 4633900 (1987-01-01), Suzuki

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