Planetary cam phaser with worm electric actuator

Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

123 9031, 74568R, 464 2, F01L 1344

Patent

active

056808372

ABSTRACT:
A planetary cam phaser includes an electric motor driven worm gear actuator for rotatably positioning a sun gear to vary the cam phase relative to the crankshaft of an associated engine. Preferably, the worm lead angle is made small to lock the actuator against back driving by camshaft generated forces so the phaser is actuated only by controlled motor movements. Alternatively, a return spring may be applied on the motor or worm shaft to return the phase to an initial position when the motor is de-energized or fails. In another version, the worm lead angle may be increased to permit limited back driving forces to drive the cam back to the initial position when the motor is off without the need for a return spring.

REFERENCES:
patent: 1220124 (1917-03-01), Hoffner
patent: 4476823 (1984-10-01), Williams
patent: 4583501 (1986-04-01), Williams
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.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Planetary cam phaser with worm electric actuator does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Planetary cam phaser with worm electric actuator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Planetary cam phaser with worm electric actuator will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1019343

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.