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FEEDBACK CONTROL OPERATION [FS5A-EL]

id051721108100
• 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