192 clutches and power-stop control – Clutches – Operators
Reexamination Certificate
2008-07-25
2011-10-18
Le, David D (Department: 3655)
192 clutches and power-stop control
Clutches
Operators
C192S085240
Reexamination Certificate
active
08037989
ABSTRACT:
A hydraulic control system for actuating a torque transmitting device in a transmission includes a sump for receiving a hydraulic fluid and a piezoelectric pump for pumping the hydraulic fluid from the sump to the torque transmitting device. A first fluid flow path communicates the hydraulic fluid from the sump to the piezoelectric pump and a second fluid flow path communicates the hydraulic fluid from the piezoelectric pump to the torque transmitting device. An exhaust means selectively communicates the hydraulic fluid from the torque transmitting device to the sump.
REFERENCES:
patent: 4738493 (1988-04-01), Inagaki et al.
patent: 6889811 (2005-05-01), Ebert et al.
patent: 2005/0092576 (2005-05-01), Hessell et al.
patent: 2005/0244288 (2005-11-01), O'Neill
patent: 2008/0011577 (2008-01-01), Burkhart et al.
Gi-Woo Kim and K. W. Wang; Piezoelectric-Hydraulic Pump Based Band Brake Actuation System for Automotive Transmission Control; Active and Passive Smart Structures and Integrated Systems 2007, edited by Yuji Matsuzaki, Mehdi Ahmadian, Donald Leo; Proc. of SPIE vol. 6525, 65251E, USA, (2007).
Moses Robert L.
Neelakantan Vijay A.
Olson Bret M.
Schultz John C.
Vahabzadeh Hamid
GM Global Technology Operations LLC
Le David D
Scott Jacob S
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