Method of determining and controlling the lock-up of a torque co

Details Method of determining and controlling the lock-up of a torque co Method of determining and controlling the lock-up of a torque co

1990-01-23

1991-02-19

Lorence, Richard

192 clutches and power-stop control

Vortex-flow drive and clutch

With brake

192 331, 3644241, 74890, 475 65, F16H 6114, F16H 4502

Patent

active

049935275

ABSTRACT:
A method of determining and controlling a lock-up of a torque converter in a four-speed automatic transmission for full or partial frictional coupling between the torque converter and the vehicle engine. The method includes the steps of checking conditions that preclude partial lock-up operation and unlocking the torque converter if partial frictional coupling is precluded. The method also includes setting initial conditions for going from unlock to partial frictional coupling and checking for conditions that allow full frictional coupling operation. The method further includes fully frictional coupling the torque converter if conditions allow full frictional coupling operation, otherwise, partially frictionally coupling the torque converter.

REFERENCES:
patent: 4428467 (1984-01-01), Hiramatsu
patent: 4457411 (1984-07-01), Hiramatsu
patent: 4468988 (1984-09-01), Hiramatsu
patent: 4570770 (1986-02-01), Nishikawa et al.
patent: 4660697 (1987-04-01), Yoneda et al.
patent: 4706790 (1987-11-01), Lockhart et al.
patent: 4725951 (1988-02-01), Niikura

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