Slip control apparatus for motor vehicle lock-up clutch

192 clutches and power-stop control – Vortex-flow drive and clutch – Including drive-lockup clutch

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Details

477169, 477176, 477906, F16H 6114, F16H 6112, F16H 4502

Patent

active

056974795

ABSTRACT:
An apparatus including a slip control device for controlling an amount of slip of a lock-up clutch disposed between pump and turbine impellers in a power transmission system of a motor vehicle, such that an actual slip speed of the lock-up clutch coincides with a target slip speed, the apparatus comprising a hunting detecting device for determining the presence of a hunting defect if an amplitude of variation of the engine speed is larger than a predetermined first reference while an amplitude of variation of the turbine speed is not larger than a predetermined second reference.

REFERENCES:
patent: 4468988 (1984-09-01), Hiramatsu
patent: 4582185 (1986-04-01), Grimes et al.
patent: 4940122 (1990-07-01), Fujieda
patent: 4947734 (1990-08-01), Fujita et al.
patent: 4953677 (1990-09-01), Aoki et al.
patent: 5105926 (1992-04-01), Yoshimura et al.
patent: 5527233 (1996-06-01), Tabata et al.
patent: 5620390 (1997-04-01), Kono et al.

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