Selecting reverse gear involves reducing hydraulic system pressure of change element requiring high holding pressure, connecting change element, raising pressure to required level

摘要

The method involves reducing the system pressure of the change element requiring a high holding pressure when in neutral or when igniting the change to reverse, connecting this change element, then raising the pressure to the required level. Applying reverse gear is carried out by the other change element; the pressure to which the other change element's associated control valve is set is adequate for holding reverse gear at maximum torque. The method involves reducing the hydraulic system pressure of the change element requiring a high holding pressure via the associated proportional valve when in neutral or when igniting the change to reverse, connecting this change element, then raising the system pressure for this element to the required level. Applying reverse gear is carried out by the other change element, whereby the pressure to which the other change element's associated control valve is set is adequate for holding reverse gear at maximum torque.