Patent ID: 7831365

Claim:
A method of controlling a variator ratio for a single stage continuously variable automatic transmission at any point across an entire range of the variator ratio, the method comprising the steps of: determining a change in a value of an accelerator pedal signal; feeding to an electronic transmission control an accelerator pedal signal corresponding to the movement of the accelerator pedal; determining a modified accelerator pedal signal from the accelerator pedal signal in the electronic transmission control; adjusting the variator ratio according to the modified accelerator pedal signal by the steps of; testing whether a periodic curve of the accelerator pedal signal has a change in slope; maintaining the modified accelerator pedal signal at a value equal to the unmodified accelerator pedal signal where a change in slope is not detected, and detecting a change in slope of the periodic curve and assigning a starting value (f_start 1 ) to the modified accelerator pedal signal where the change in slope is detected, and determining the modified accelerator pedal signal according to a transfer function until the value of the modified accelerator pedal signal is the same as the value of the unmodified accelerator pedal signal.