System and method for controlling an automatic transmission...

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

Reexamination Certificate

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C477S148000, C477S094000

Reexamination Certificate

active

07014592

ABSTRACT:
A method for controlling an automatic transmission in a vehicle is provided. The method selectively provides automatic engine braking for the vehicle. When it is determined that automatic engine braking is desired, the upshift schedule is increased, such that a higher vehicle speed is required to upshift for any given accelerator pedal position. The transmission is automatically downshifted to a lower gear to provide engine braking for the vehicle, when a vehicle acceleration threshold is exceeded. The automatic downshifting of the transmission can occur when the brake pedal is engaged, and when the brake pedal is disengaged.

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patent: 6421596 (2002-07-01), Lee
patent: 2002/0158511 (2002-10-01), Baumgartner et al.

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