Camshaft phase change device

Details Camshaft phase change device Camshaft phase change device

1992-02-24

1992-12-22

Argenbright, Tony M.

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9031, 464 1, 464 2, F01L 134

Patent

active

051726629

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).

REFERENCES:
patent: 3721220 (1973-03-01), Garcea
patent: 4627825 (1986-12-01), Bruss et al.
patent: 4872427 (1989-10-01), Gustafson
patent: 4901831 (1990-02-01), Ito et al.
patent: 5002023 (1991-03-01), Butterfield et al.
patent: 5046460 (1991-09-01), Butterfield et al.
patent: 5056477 (1991-10-01), Linder et al.
patent: 5056478 (1991-10-01), Ma
patent: 5056479 (1991-10-01), Suga
patent: 5078647 (1992-01-01), Hampton

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