Gm Global Technolgoy Operations, Inc.

John William Kimes

Boris Iosifovich Burgman

Patrick M Gibson

Dwayne P Joppeck

James A Springer

Issam A Taha

A selectable one-way clutch assembly for use in an automatic transmission comprises a strut plate rotatable about a central hub and having pockets and struts mounted therein for pivotable rotation. A selecting plate concentrically located about an activator hub has teeth extending axially inboard and configured to fit in the apertures in an activator plate. A turning device is selectively operable to activate one-way clutching mode by rotating the pin of a control plate to disengage selecting cams and displace selecting plate teeth inboard beyond the inboard face of the activator plate wherein the struts catch the teeth when the strut plate assembly is rotated in a clutching direction. The catching ends of the struts are cammed in the pockets by ramped camming ends of the teeth when the strut plate assembly is rotated in the opposing direction, thereby allowing freewheeling of the strut plate in the overrun direction.

Selectable one-way clutch assembly

A planet carrier assembly has a plurality of pinion gears rotatably mounted in a cage or spider. A stationary washer, having four bearing pads, is disposed adjacent the sidewall of the planet carrier cage. Th& sidewalls are spaced and have aligned openings to accept pinion pins on each of which a pinion gear is rotatably mounted. A rotatable washer, or thrust bearing, is disposed between each pinion gear and respective bearing pads of the stationary washers.

Planet carrier assembly with stationary washer members

A planetary gear arrangement has one or more planetary gear sets each having a carrier assembly in which a plurality of pinion gears are rotatably mounted on pins supported in a carrier housing. An annular lube dam is attached to the carrier housing and includes a first and second annular sidewall portions extending radially inward and joined by an axial wall portion. The radially innermost sidewall portion directs lubrication fluid to the support pins for delivery to the pinion gears. The axial wall engages notched portions on the pins to ensure the angular orientation of the lube passages formed in the pins. The outermost annular wall portion provides a thrust washer bearing surface between the carrier assembly and an adjacent transmission component to support relative rotation therebetween.

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Wayne, MI, United States of America

John William Kimes