Patent Document ID: 4821190
Application ID: 07006838
Patent Flag: 1

Claim One:
1. A method for controlling during a drive ratio change the operation of a power source and a transmission, which driveably connects the power source and the drive wheels of a motor vehicle, has a gearset capable of producing multiple drive ratios and a clutch engaged and disengaged to change the drive ratio produced by the transmission, the power source producing torque whose magnitude varies in accordance with a signal supplied to the power source control unit, comprising: producing a commanded power source speed corresponding to the drive ratio to which the transmission will be shifted; producing a commanding clutch pressure from the power source torque error derived from the difference between the commanded power source speed and the actual power source speed; controlling the torque transmitted by the clutch by supplying pressure to the clutch in accordance with the clutch pressure error derived from the difference between the commanded clutch pressure and the actual clutch pressure; producing a commanded drive wheel torque corresponding to the drive wheel speed demanded by the vehicle operator; producing a commanded power source torque from the motor type error derived from the difference between the commanded drive wheel torque and the actual drive wheel torque; and controlling the torque produced by the power source by supplying to the power source control unit a compensated commanded power source error signal derived from the difference between the commanded power source torque and the actual power source torque.