Valve driving mechanism for internal combustion engines

Details Valve driving mechanism for internal combustion engines Valve driving mechanism for internal combustion engines

1991-05-24

1992-04-28

Cross, E. Rollins

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9031, F01L 134

Patent

active

051078023

ABSTRACT:
A valve drive system including mechanisms for varying the timing and lift of intake and exhaust valves in internal combustion engines. In one embodiment, an intake camshaft support member and an exhaust camshaft support member are separately mounted to pivot about axes relative to intake and exhaust rocker arms. The support members include concentric mountings along which the support members together with the cams mounted therein move to selectively advance and retard the valve timing and vary the valve lift. In other embodiments, the camshaft support is unitary in construction for both the intake and exhaust valve train. A variety of adjustments are possible with the several configurations including intake valve closure before bottom dead center during partial load operation.

REFERENCES:
patent: 4580533 (1986-04-01), Oda et al.
patent: 4582029 (1986-04-01), Masuda et al.
patent: 4651684 (1987-03-01), Masuda et al.

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