Title:
REAR WHEEL DRIVE AUTOMATIC TRANSMISSION WITH A SELECTABLE ONE-WAY CLUTCH
Document Type and Number:
WIPO Patent Application WO/2010/011478
Kind Code:
A3
Abstract:
A vehicle includes a rear-wheel drive (RWD) automatic transmission having a stationary member, a two-mode selectable one-way clutch (SOWC), pressurized fluid, and a valve body assembly (VBA). The VBA has a piston, a return spring, and an actuator linkage in contact with the piston and a shift lever of the SOWC. Fluid moves the piston and linkage in one direction to lock the SOWC and enable a reverse mode having no spin losses, and the spring moves the piston and linkage in another direction to unlock the SOWC in a forward mode. A method reduces spin losses by admitting fluid into the VBA to move the piston in one direction to thereby rotate the shift lever of the SOWC to one angular position to lock a driving member of the transmission to the stationary member during reverse, engine braking first gear, and manual low speeds.
Inventors:
SAMIE FARZAD (US)
BARTOS ANDREW L (US)
LEE CHUNHAO J (US)
BARTOS ANDREW L (US)
LEE CHUNHAO J (US)
Application Number:
PCT/US2009/049353
Publication Date:
April 15, 2010
Filing Date:
July 01, 2009
Export Citation:
Assignee:
GM GLOBAL TECH OPERATIONS INC (US)
International Classes:
F16D41/06; F16D25/00; F16D41/00
Foreign References:
| JP2003278797A | 2003-10-02 | |||
| US6712732B1 | 2004-03-30 | |||
| US5829560A | 1998-11-03 | |||
| JPH0893901A | 1996-04-12 | |||
| US20070184933A1 | 2007-08-09 | |||
| US20070099758A1 | 2007-05-03 | |||
| US6290044B1 | 2001-09-18 | |||
| US20080169165A1 | 2008-07-17 |
Attorney, Agent or Firm:
CICHOSZ, Vincent, A. (PLLC129 E. Commerce Stree, Milford MI, US)
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