Variable valve timing rocker arm arrangement for internal combus

Details Variable valve timing rocker arm arrangement for internal combus Variable valve timing rocker arm arrangement for internal combus

1990-09-25

1992-02-04

Cross, E. Rollins

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9039, F01L 134, F01L 118

Patent

active

050851829

ABSTRACT:
A main rocker arm which is pivotally mounted on a rocker shaft has one or more sub-rocker arms pivotally mounted thereon. The main rocker arm is arranged to synchronously open and close two poppet valves. Each of the sub-rocker arms can be selectively locked to the main one by way of hydraulically operated plunger arrangements. The main rocker arm is provided with a roller type cam follower which follows a low speed cam. The sub-rocker arms are provided with followers which engage high or very high speed cams. Lost motion springs which maintain the sub-rocker arms in contact with the cams are mounted on the main rocker arm.

REFERENCES:
patent: 4151817 (1979-05-01), Mueller
patent: 4203397 (1980-05-01), Soeters, Jr.
patent: 4617880 (1986-10-01), Yoshizaki
patent: 4726332 (1988-02-01), Nishimura et al.
patent: 4768475 (1988-09-01), Ikemura
patent: 4844023 (1989-07-01), Konno et al.
patent: 4911112 (1990-03-01), Oikawa et al.

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