Planetary gear transmission systems or components – Fluid drive or control of planetary gearing – Control of differential planetary gearing
Reexamination Certificate
2007-10-09
2007-10-09
Wright, Dirk (Department: 3681)
Planetary gear transmission systems or components
Fluid drive or control of planetary gearing
Control of differential planetary gearing
Reexamination Certificate
active
11274765
ABSTRACT:
A torque transfer mechanism having a multi-plate friction clutch connecting a pair of rotary members and an electrohydraulic clutch actuator for controlling engagement of the friction clutch. The clutch actuator includes a hydraulic pump, a hydraulically-actuated rotary operator, and a ball ramp mechanism. The hydraulic pump draws low pressure fluid from a sump and delivers high pressure fluid to a series of actuation chambers defined between coaxially aligned first and second components of the rotary operator. The magnitude of the fluid pressure delivered to the actuation chamber controls angular movement of the second component relative to the first component for energizing the ball ramp mechanism. The ball ramp mechanism applies a clutch engagement force on the friction clutch assembly, thereby transferring drive torque from the first rotary member to the second rotary member. A hydraulic control system adaptively regulates the fluid pressure delivered to the actuation chamber.
REFERENCES:
patent: 4862769 (1989-09-01), Koga et al.
patent: 4895236 (1990-01-01), Sakakibara et al.
patent: 5119298 (1992-06-01), Naito
patent: 5224906 (1993-07-01), Sturm
patent: 5323871 (1994-06-01), Wilson et al.
patent: 5407024 (1995-04-01), Watson et al.
patent: 5423235 (1995-06-01), Botterill et al.
patent: 6158561 (2000-12-01), Sakai et al.
patent: 6478708 (2002-11-01), Krisher
patent: 6520880 (2003-02-01), Fukushima et al.
patent: 6595338 (2003-07-01), Bansbach et al.
patent: 6641267 (2003-11-01), Ohishi et al.
patent: 6691845 (2004-02-01), Showalter
patent: 6945374 (2005-09-01), Puiu
patent: 6948604 (2005-09-01), Puiu
patent: 6991079 (2006-01-01), Puiu
patent: 7004873 (2006-02-01), Puiu
patent: 2005/0167223 (2005-08-01), Puiu
patent: 62-18117 (1990-01-01), None
patent: 63-66927 (1990-03-01), None
Harness & Dickey & Pierce P.L.C.
Magna Powertrain USA, Inc.
Wright Dirk
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