Method of controlling clutch slip during gear shifts of an...

Details Method of controlling clutch slip during gear shifts of an... Method of controlling clutch slip during gear shifts of an...

2008-03-25

2008-03-25

Beaulieu, Yonel (Department: 3661)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

Clutch control

C701S051000, C477S034000, C477S039000, C477S070000, C477S090000

Reexamination Certificate

active

07349785

ABSTRACT:
A method is provided for controlling engagement of a clutch which carries torque before, during and after a shifting event in a transmission which is connected to a throttle-controlled engine. The method includes providing a feed forward input command which increases as the engine torque increases and decreases as the engine torque decreases. A feed-back input command is provided as a function of the error between measured clutch slip and a reference slip profile. The feed-forward input command and feed-back input command are summed to provide a clutch control command for controlling engagement of the clutch before, during and after the shifting event to allow a desired amount of clutch slip to damp excitation of the transmission.

REFERENCES:
patent: 4928227 (1990-05-01), Burba et al.
patent: 6110068 (2000-08-01), Kraska
patent: 6299565 (2001-10-01), Jain et al.
patent: 6695108 (2004-02-01), Hanke et al.
patent: 7044888 (2006-05-01), Lee et al.

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