Fast-off Detection

To decelerate, the driver takes his foot off the accelerator pedal and uses the brakes is necessary. Closure of the throttle caused by the change in shift characteristics, tends to make the transmission upshift.

This gear change is not desirable because it hinders the braking effect of the engine. In addition, in many cases, using the brake pedal again shortly after shifting up or down considerably increases shift frequency.

The objective of this function is, therefore, to block upshifting in the circumstances described. The driver's desire to decelerate is detected by very fast return of the pedal into the zero position (Fast-Off). If this action is detected, upshifting is suppressed while the accelerator is in the zero position and the vehicle is moving.