Valve actuating apparatus

Details Valve actuating apparatus Valve actuating apparatus

1992-10-22

1994-03-29

Cross, E. Rollins

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9022, F01L 134

Patent

active

052975169

ABSTRACT:
An apparatus for actuating valves of an engine is disclosed. A cam shaft is supported by the engine and has at least one set of cams, e.g., two axially spaced low speed cams and a high speed cam between the low speed cams. A rocker shaft is supported by the engine. The rocker shaft supports a rocker arm for the valves. The rocker arm is driven by the low speed cams. The rocker arm has a sub-rocker shaft and a pin. A free cam follower is supported by the sub-rocker shaft and driven by the high speed cam. The apparatus comprises a mechanism including a lever supported by the pin of the rocker arm. The lever has a first position wherein the lever and the free cam follower are joined for attaining unitary motion of the free cam follower with the rocker arm. The lever has a second position wherein the lever and the free cam follower are separated for allowing relative motion of the free cam follower with respect to the rocker arm. The mechanism includes a hydraulic piston for urging the lever to the first position.

REFERENCES:
patent: 4151817 (1979-05-01), Mueller
patent: 4203397 (1980-05-01), Soeters, Jr.
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patent: 4768467 (1988-09-01), Yamada et al.
patent: 4768475 (1988-09-01), Ikemura
patent: 4844023 (1989-07-01), Konno et al.
patent: 5020488 (1991-06-01), Watanabe
patent: 5046462 (1991-09-01), Matayoshi et al.
patent: 5085182 (1992-02-01), Nakamura et al.

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