Cylinder valve operating system

Details Cylinder valve operating system Cylinder valve operating system

1996-10-11

1997-12-30

Lo, Weilun

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9022, 123198F, F01L 126, F01L 1300, F02D 1306

Patent

active

057018570

ABSTRACT:
A cylinder valve operating system comprises a pivotable rocker arm engaged with at least one cylinder valve, a first free cam follower supported by the rocker arm and driven by a first cam with a cam profile suitable for operation at low engine speeds, a second free cam follower supported by the rocker arm and driven by a second cam with a cam profile suitable for operation at high engine speeds, a first lever for establishing a positive motion connection between the first free cam follower and the rocker arm, a second lever for establishing a positive motion connection between the second free cam follower and the rocker arm, and a hydraulic driver for the first and second levers.

REFERENCES:
patent: 5085182 (1992-02-01), Nakamura et al.
patent: 5099806 (1992-03-01), Murata et al.
patent: 5297516 (1994-03-01), Hara
patent: 5435276 (1995-07-01), Nakamura et al.
patent: 5445116 (1995-08-01), Hara
patent: 5544626 (1996-08-01), Diggs et al.

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