Dual event valve control system

Details Dual event valve control system Dual event valve control system

1996-07-22

1997-08-12

Lo, Weilun

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9041, 123 9046, F01L 1300, F01L 118

Patent

active

056554885

ABSTRACT:
A dual event valve control system for an internal combustion engine. The system includes an inner rocker arm in engagement with a valve and with a first cam, an outer rocker arm in engagement with a second cam, and a latch member which is insertable between the rocker arms, whereupon when the rocker arms do not engage the latch member, the rocker arms are free to pivot independently of one another and the valve is actuated by the first rocker arm in accordance with the lift profile of the first cam, and when the rocker arms are engaged by the latch member, the rocker arms rotate in unison and the valve is actuated by the second rocker arm in accordance with the lift profile of the second cam. A stop acting between the inner and outer rocker arms limits relative pivoting movement between the rocker arms and is effective to provide clearance between the base circle portion of its second cam and the outer rocker arm.

REFERENCES:
patent: 4151817 (1979-05-01), Mueller
patent: 4556025 (1985-12-01), Morita
patent: 5203289 (1993-04-01), Hara et al.
patent: 5452694 (1995-09-01), Hara
patent: 5524580 (1996-06-01), Muir
patent: 5529033 (1996-06-01), Hampton
patent: 5544626 (1996-08-01), Diggs et al.

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