Deceleration dependent shift control
AssigneeGM Global Technology Operations LLC
InventorsJayson S. Schwalm, David W. Wright, Christopher A. Spangler, Andriy Nikitin
Life of this patent
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Abstract
A transmission control system for regulating operation of an automatic transmission of a vehicle includes a first module that provides a predetermined shift schedule including upshift and downshift lines and a second module that offsets each of the upshift and downshift lines by an offset amount to provide modified upshift and downshift lines when a deceleration of the vehicle exceeds a threshold deceleration. A third module regulates operation of the automatic transmission based on the modified upshift and downshift lines.
Claims20
A transmission control system for regulating operation of an automatic transmission of a vehicle, comprising:
- a first module that provides a predetermined shift schedule including upshift and downshift lines;
- a second module that offsets each of said upshift and downshift lines by an offset amount concurrently to provide modified upshift and downshift lines when a deceleration of said vehicle exceeds a threshold deceleration;
- and
- a third module that regulates operation of said automatic transmission based on said modified upshift and downshift lines.
A method of regulating operation of an automatic transmission of a vehicle, comprising:
- providing a predetermined shift schedule including upshift and downshift lines;
- offsetting each of said upshift and downshift lines by an offset amount concurrently to provide modified upshift and downshift lines when a deceleration rate of said vehicle exceeds a threshold deceleration rate;
- and
- regulating operation of said automatic transmission based on said modified upshift and downshift lines.
Dependencies are inferred from the claim text.