Latched-pump applied clutch

Details Latched-pump applied clutch Latched-pump applied clutch

2006-08-24

2009-08-25

Bonck, Rodney H (Department: 3655)

192 clutches and power-stop control

Clutches

Operators

C060S413000, C192S085060

Reexamination Certificate

active

07578376

ABSTRACT:
A latched-pump applied clutch circuit is provided for a vehicle transmission having a controllable pump, a controllable pump pressure, and a main sump, the latched-pump applied clutch circuit comprising a clutch, a clutch piston disposed within a cylinder, a plurality of fluid passages, an accumulator, and one or more solenoid valves in fluid communication with the accumulator for building of a backside boost pressure within the accumulator. The backside boost pressure is used to increase, boost, or otherwise assist clutch-apply pressure within the latched-pump applied clutch circuit during transient periods requiring increased torque capacity. The circuit may include an alternative electro-mechanical device for directly applying a controllable backside boost pressure independent of the controllable pump pressure.

REFERENCES:
patent: 3985063 (1976-10-01), Lemon
patent: 6774595 (2004-08-01), Laxhuber et al.
patent: 7036644 (2006-05-01), Stevenson et al.
patent: 7059579 (2006-06-01), Stevenson
patent: 2005/0023102 (2005-02-01), Brissenden et al.

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