Torque converter

Details Torque converter Torque converter

2007-06-26

2007-06-26

Bonck, Rodney H. (Department: 3681)

192 clutches and power-stop control

Vortex-flow drive and clutch

Including drive-lockup clutch

C477S062000, C701S067000

Reexamination Certificate

active

11108830

ABSTRACT:
A lock-up clutch controlling device includes a three-dimensional back pressure map, a sensor, and a lock-up pressure controlling unit. The map allows a back pressure of a lock-up piston to be determined from a rotational speed of an engine, an oil temperature, and a speed ratio. The sensor is provided for a parameter influencing the back pressure of the piston. The lock-up pressure controlling unit determines a value equivalent to the back pressure of the lock-up piston from an input value of the sensor and the hydraulic pressure map, and outputs a lock-up pressure to be applied to a lock-up clutch by using the value equivalent to the back pressure of the lock-up piston. When the controlling device operates, it outputs the lock-up pressure by using the value equivalent to the back pressure of the lock-up piston.

REFERENCES:
patent: 5893438 (1999-04-01), Hasegawa et al.
patent: 6050919 (2000-04-01), Kusafuka et al.
patent: 2002/0040622 (2002-04-01), Tsunekawa et al.
patent: 2004/0029672 (2004-02-01), Tsunekawa et al.
patent: 5-187541 (1993-07-01), None
patent: 7-113409 (1995-05-01), None
patent: 2001-116138 (2001-04-01), None
patent: 2001-271906 (2001-10-01), None

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