Transmission clutch loop transfer control

Details Transmission clutch loop transfer control Transmission clutch loop transfer control

1987-04-30

1988-12-13

Bonick, Rodney H.

192 clutches and power-stop control

Vortex-flow drive and clutch

With brake

192 0092, 192 358, 192 54, 192103F, 74752A, B60K 4102, F16D 43284, F16D 43286

Patent

active

047904186

ABSTRACT:
A method for controlling the transfer of load from one friction element to another friction element while making a gear ratio change in an automatic transmission. The synchronous engine speed is increased by slipping the offgoing clutch. A constant is calculated from known speed ratios of the gear set, engine inertia, the difference in engine speed from synchronous speed and a constant that corresponds to the output torque at the end of the torque phase of the gear ratio shift. The time rate of change of the offgoing clutch torque is calculated and the clutch pressures are changed in accordance with the calculated torque slope.

REFERENCES:
patent: 3956947 (1976-05-01), Leising et al.
patent: 4360092 (1982-11-01), Muller et al.
patent: 4527678 (1985-07-01), Pierce et al.
patent: 4685356 (1987-08-01), Iwatsuki
Article--Bond Graph Modeling of Dominant Dynamics of Automotive Power Trains by Hrovat et al.
Article--Bond Graph Modeling and Computer Simulation of Automotive Torque Converters by Hrovat et al.
Article--Ratio Changing the Passenger Car Automatic Transmission by Winchell et al.

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