Camshaft phase change device

Details Camshaft phase change device Camshaft phase change device

1993-08-05

1994-08-16

Cross, E. Rollins

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9031, 464 2, H01L 134

Patent

active

053377117

ABSTRACT:
Devices (10,110,150,200 and 250) include roller clutches for controlling rotational phase change of a camshaft between full advance and full retard positions and positions therebetween. Each of the devices includes sets of selectively operative rollers such as a set of rollers (36) for preventing phase retard and a set of rollers (34) for preventing phase advance. Devices (10,110,150 and 200) have pairs of rollers 36,34 acted on respectively by ramp surfaces (32d,32c) defined by a common flat surface. An annular member (32) defining ramp surface (32d,32c) is mounted with free play relative to an axis of the camshaft. Device (110) includes a splitter spring (112). Devices 150 and 200 include internal actuators (152,202).

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