Control for the clutch of a fluid torque converter in a vehicula

Details Control for the clutch of a fluid torque converter in a vehicula Control for the clutch of a fluid torque converter in a vehicula

1986-11-25

1988-09-06

Braun, Leslie A.

192 clutches and power-stop control

Vortex-flow drive and clutch

With brake

192 33, 192 329, 192 331, 192103F, F16D 4702, B60K 4102

Patent

active

047686359

ABSTRACT:
A vehicular transmission having a fluid torque converter of the type in which a clutch is provided for mechanically connecting the input and output sides of a fluid torque converter above certain vehicle speeds for improved operation and economy and in which the clutch is operated within a predetermined vehicular speed range by such a relatively low engaging force as to allow slippage of said clutch for minimizing vibration. A control system causes the engaging force of the clutch to be increased more than that which is normally established below a reference value of small throttle valve opening for providing a braking effect by the engine. The control system also may provide for stopping the increase in engaging force at small throttle valve openings when the r.p.m. of the output side of the fluid torque converter falls below the r.p.m. at the input side, such as during a transition from a steep downward slop to a gentle downward slope, or when low oil temperature and high oil viscosity would cause operation too abruptly.

REFERENCES:
patent: 4457411 (1984-07-01), Hiramatsu
patent: 4582185 (1986-04-01), Grimes et al.

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