Control systems for drivelines including continuously-variable-r

Details Control systems for drivelines including continuously-variable-r Control systems for drivelines including continuously-variable-r

1994-09-29

1996-05-28

Teska, Kevin J.

Boots, shoes, and leggings

477 43, 477 50, 477110, B60K 4122

Patent

active

055218199

ABSTRACT:
A vehicle driveline including a control system subject to operator demand, and a continuously-variable-ratio transmission including a variator of the torque-controlled type in which the control system includes a performance "map" of optimum relationships between engine torque and speed over a range of values of those two quantities, and in which the control system regulates both the energy input to an engine and also the reaction torque at the variator so as to seek a state in which the mapped optimum relationship between engine torque and speed is maintained. The variator may be of the toroidal-race rolling-traction type, reaction torque within it being regulated by controlling the operating force applied to the variator rollers. The control system may act so as to compute the variator reaction torque with relation to two alternative calculations based on the transmission input and output torques, respectively, and may choose for operation, at any given time, the calculation yielding the lesser value of that variator reaction torque.

REFERENCES:
patent: 4458318 (1984-07-01), Smit et al.
patent: 4458560 (1984-07-01), Frank et al.
patent: 4735112 (1988-04-01), Osanai et al.
patent: 4982822 (1991-01-01), Petzold et al.
patent: 5047937 (1991-09-01), Vahabzadel et al.
patent: 5062050 (1991-10-01), Petzold et al.

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