Rocker arm arrangement for variable timing type valve train

Details Rocker arm arrangement for variable timing type valve train Rocker arm arrangement for variable timing type valve train

1990-08-24

1991-07-23

Cross, E. Rollins

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9012, F01L 134

Patent

active

050334204

ABSTRACT:
Main and sub-rocker arms mounted on a common shaft and pivotally supported on a cylinder head by a pivot formed at the end of an adjust screw which is provided at one of the main rocker arm. The main and sub-rocker arms are motivated by cams suited for low engine speed and high engine speed operation respectively. A hydraulically operated interlocking device which selectively locks the main and sub-rocker arms together, is controlled by a supply of hydraulic fluid by way of a passage structure formed in the adjust screw and a pivot seat in which the pivot is received.

REFERENCES:
patent: 4537164 (1985-08-01), Ajiki et al.
patent: 4768467 (1988-09-01), Yamada et al.
patent: 4829948 (1989-05-01), Yoshida et al.
patent: 4957076 (1990-09-01), Inoue et al.

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