Gear change control for automatic gear box transmitting torque from input shaft across frictional elements

摘要

The gear changing control has an input shaft torque determining unit (A) for determining the input shaft torque, a torque distribution ratio setting unit (B) for setting a torque distribution ratio for each frictional structural element of each gear range. A unit (C) for computing the desired torque, to compute a desired torque for at least one friction structural element, based on the input shaft torque and the torque distribution ratio, which is set for at least one friction structural element. A unit (D) computes the desired hydraulic fluid, for computing a desired hydraulic fluid pressure for the at least one friction structural element, based on the desired torque for at least one friction structural element. Also a hydraulic fluid control unit, for delivering the desired hydraulic fluid pressure for the at least one friction structural element.