Lockup control device for a torque converter

Power plants – Pressure fluid source and motor – Coaxial impeller and turbine unit

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Details

74732, 74866, 192 329, 192 331, F16D 3300

Patent

active

045107475

ABSTRACT:
A lockup control device for a torque converter, which is provided with a lockup clutch engageable to connect a pump at the torque converter directly with a turbine thereat and disengageable to release the direct connection of the pump and turbine, and with an actuating device comprising a car speed detector which detects car speed to output a plurality of car speed signals, a negative pressure detector which detects a suction pipe negative pressure to output a plurality of negative pressure signals, and an actuator operable in response to the car speed and negative pressure signals, so that, on a basis of the car speed and negative pressure signals output from the respective detectors, the clutch is engaged when the car speed is greater than or equal to a predetermined speed and the suction pipe negative pressure is greater than or equal to a predetermined pressure, and is disengaged when the car speed is less than the predetermined speed and the negative pressure is less than the predetermined pressure.

REFERENCES:
patent: 2676497 (1954-04-01), Ahlen
patent: 2722133 (1955-11-01), Lapsley
patent: 3068974 (1962-12-01), Jandasek
patent: 3485328 (1969-12-01), Bilton
patent: 3688609 (1972-09-01), Friedline
patent: 3693478 (1972-09-01), Malloy
patent: 3824878 (1974-07-01), Grosseau
patent: 4318312 (1982-03-01), Morimoto

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