Variable lift camming apparatus and methods of constructing and

Details Variable lift camming apparatus and methods of constructing and Variable lift camming apparatus and methods of constructing and

1978-10-20

1981-03-31

Myhre, Charles J.

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9012, F01L 134

Patent

active

042586720

ABSTRACT:
A variable lift camming apparatus for controlling the intake and exhaust valves associated with the combustion chambers of an internal combustion engine. The apparatus provides a wide range of valve lift opening movements and a wide range of valve opening duration periods and affords flexibility in valve timing. The apparatus includes a specially-contoured intake cam member and exhaust cam member, both mounted for axial sliding movement on a splined shaft, with the cam members being shifted to selected positions in response to the speed of the engine. Camming action is transmitted from the cam members to the valves by a valve operating system which includes a hydraulic cam-action transmitting member.

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Norbye, Variable Valve Timing and Rotary Valves, Road and Track, Apr. 1977, pp. 121-125.

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