Planetary cam phaser with lash compensation

Details Planetary cam phaser with lash compensation Planetary cam phaser with lash compensation

1996-09-17

1997-10-28

Lo, Weilyn

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9031, 74568R, 464 2, F01L 1344

Patent

active

056808364

ABSTRACT:
A planetary cam phaser for varying the timing of an engine camshaft is provided with oppositely tapered teeth on the planet gear(s) and the mating ring and sun gears and biasing means for urging the mating gears axially into lash free engagement. The tapered teeth may be formed on constant pitch circles or on conical pitch circles of conical gears and the teeth of at least one of a pair of mating gears may be crowned to control loading and wear. The taper angles of the teeth and/or the conical pitch circles of the conical gears are preferably made small enough to avoid gear drive forces from developing gear separation forces greater than restraining friction forces.

REFERENCES:
patent: 4976229 (1990-12-01), Charles
patent: 5156119 (1992-10-01), Suga
patent: 5174253 (1992-12-01), Yamazaki et al.
patent: 5203291 (1993-04-01), Suga et al.
patent: 5327859 (1994-07-01), Pierik et al.
patent: 5355849 (1994-10-01), Schiattino
patent: 5361736 (1994-11-01), Phoenix et al.
patent: 5365898 (1994-11-01), Mueller
patent: 5542383 (1996-08-01), Clarke et al.

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