#
FEEDBACK CONTROL OPERATION

BME051718880113

• When shifting, real-time feedback correction of the clutch engagement pressure is operated by the duty-cycle solenoid valves so that the speed change of the turbine shaft (change of the turbine rotating speed) matches the predetermined target value.

• Also, the clutch engagement pressure is optimally corrected so as to absorb the changes in engine performance and/or of elapsed transaxle, according to the shift results in the past.

1 | Turbine rotating speed
2 | Hydraulic pressure
3 | Clutch engagement pressure
4 | Target turbine rotating speed
5 | Controls turbine change rate at start of shift so that target value is obtained
6 | Performs feedback control so that target change rate of the turbine rotating speed is obtained
7 | Time