A method of controlling the ratio of a continuously variable transmission
(CVT) that is controlled by a CVT controller is provided. The method
includes determining the torque produced by an engine, calculating an
acceleration limit value based upon the torque value and the engine
inertia value and a calibrated acceleration limiting ratio. The
acceleration limit value is compared to the desired engine speed value to
determine a command engine speed value. The CVT ratio is then calculated
by dividing the command engine speed value by a measured vehicle speed
value. The calculated CVT ratio is compared to a measured CVT ratio and a
control signal is sent to an actuator of a CVT. Torque provided to the
engine to overcome the engine inertia is limited by the method so that
the step change in torque provided to the vehicle wheels, as the engine
approaches the command engine speed value, is reduced.