Engaging force control of lockup clutch

Details Engaging force control of lockup clutch Engaging force control of lockup clutch

2005-03-01

2005-03-01

Ho, Ha (Department: 3681)

Interrelated power delivery controls, including engine control

Clutch control

Regulated clutch engagement

C477S077000, C477S084000, C477S086000

Reexamination Certificate

active

06860834

ABSTRACT:
A controller (12) controls the engaging force of a lockup clutch (2c) connecting an engine (1) and an automatic transmission (3) via an engaging force regulating mechanism (11, 13). The controller (12) sets a target relative rotation speed (ωSLPT) according to a difference between a target engine rotation speed (TGT_EREV) and an input rotation speed (PriREV) of the automatic transmission (3). When an initial engine rotation speed (ST_EREV) is smaller than the target engine rotation speed (TGT_EREV), the controller (12) causes the target relative rotation speed (ωSLPT) to gradually vary from an initial relative rotation speed (ST_SREV) to a predetermined target change-over relative rotation speed (CHG_REV). By controlling the engaging force regulating mechanism (11, 13) on the basis of the target relative rotation speed (ωSLPT) set in this way, a prompt and appropriate lockup operation of the lockup clutch (2c) is realized in response to the vehicle conditions.

REFERENCES:
patent: 4582185 (1986-04-01), Grimes et al.
patent: 5653661 (1997-08-01), Kato et al.
patent: 5733223 (1998-03-01), Matsubara et al.
patent: 5853350 (1998-12-01), Hasegawa et al.
patent: 6066072 (2000-05-01), Adachi
patent: 2-203071 (1990-08-01), None
patent: 5-71639 (1993-03-01), None

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