Automatic transmission gear shift control during power reduction

Interrelated power delivery controls – including engine control – Transmission control – Engine controlled by transmission

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Details

B60K 4110

Patent

active

055474357

ABSTRACT:
A method and system for controlling gear ratio changes of a transmission operating in a powertrain with an internal combustion engine controlled by an engine throttle and having a device, such as traction assist system, that alters engine torque from that corresponding to the position of the throttle. The control substitutes a synthetic throttle position for actual throttle position during a traction assist event. Gearshifts occur with reference to a schedule relating the desired gear, vehicle speed, and synthetic throttle position.

REFERENCES:
patent: 5086670 (1992-02-01), Nitz et al.
patent: 5191953 (1993-03-01), Ito et al.
patent: 5377562 (1995-01-01), Kitagawa et al.
patent: 5403247 (1995-04-01), Yagi
patent: 5405302 (1995-04-01), Yagi et al.

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