Deceleration dependent shift control
AssigneeGM Global Technology Operations LLC
InventorsJason S. Schwalm, David W. Wright, Christopher A. Spangler, Andriy Nikitin
Life of this patent
Estimating the term…
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.
Claims30
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 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 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.
A method of regulating operation of an automatic transmission of a vehicle, comprising:
- monitoring an acceleration of said vehicle;
- providing a predetermined shift schedule including upshift and downshift lines;
- entering an offset mode by offsetting each of said upshift and downshift lines by an offset amount to provide modified upshift and downshift lines based on said acceleration;
- regulating operation of said automatic transmission based on said modified upshift and downshift lines;
- and
- exiting said offset mode when at least one of a plurality of exit conditions exists.
Dependencies are inferred from the claim text.