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...http://www.google.fr/patents/US5033420?utm_source=gb-gplus-shareBrevet US5033420 - Rocker arm arrangement for variable timing type valve train
Rocker arm arrangement for variable timing type valve train
