Hydraulic transmission apparatus with lockup clutch

Details Hydraulic transmission apparatus with lockup clutch Hydraulic transmission apparatus with lockup clutch

2006-08-22

2006-08-22

Estremsky, Sherry (Department: 3681)

Interrelated power delivery controls, including engine control

Clutch control

With fluid drive

C477S175000

Reexamination Certificate

active

07094179

ABSTRACT:
A hydraulic transmission apparatus with a lockup clutch has a pump impeller, a turbine runner, a side cover, a lockup clutch, a clutch piston, a lockup control unit, a frictional engagement unit and a resilient member, a backward movement stopping unit, wherein a transmission capacity of the lockup clutch by virtue of a biasing force of the resilient member is set smaller than a torque absorption capacity of the pump impeller when the engine is in an idle state so that the clutch piston is held at the predetermined backward position by virtue of the pressure difference when the engine is in the idle state.

REFERENCES:
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patent: 4516671 (1985-05-01), Nishikawa et al.
patent: 4693347 (1987-09-01), Nishikawa et al.
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patent: 5651752 (1997-07-01), Wakahara et al.
patent: 5802490 (1998-09-01), Droste
patent: 2004/0251104 (2004-12-01), Abe et al.
patent: 11-63151 (1999-03-01), None
patent: 11-201260 (1999-07-01), None
patent: 2001-280444 (2001-10-01), None
Notiffication of Reason for Refusal dated Jan. 25, 2006.

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