Lock up control of a hydraulic torque converter type automatic t

Details Lock up control of a hydraulic torque converter type automatic t Lock up control of a hydraulic torque converter type automatic t

1984-03-22

1987-08-18

Bonck, Rodney H.

192 clutches and power-stop control

Vortex-flow drive and clutch

With brake

192 33, 192 331, F16H 4502, B60K 4102

Patent

active

046870830

ABSTRACT:
A vehicle automatic transmission including a torque converter having a lock up clutch. A lock up control circuit is provided and has a memory including a first lock up control line for controlling the engagement and release of the lock up clutch when the torque converter turbine speed is close to the pump impeller speed, and a second lock up control line which is drawn along a line wherein the engine output torque is substantially zero so that the lock up clutch is released at a given engine load when the turbine speed is decreased beyond the first lock up control line, or when the turbine speed is increased beyond the second lock up control line.

REFERENCES:
patent: 4108022 (1978-08-01), Arai et al.
patent: 4449618 (1984-05-01), Suga et al.
patent: 4456107 (1984-06-01), Ito et al.
patent: 4457411 (1984-07-01), Hiramatsu
patent: 4510747 (1985-04-01), Yoshida
patent: 4516671 (1985-05-01), Nishikawa et al.

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