| 摘要 |
PROBLEM TO BE SOLVED: To provide a method to calibrate a main parameter for control of a proportional control valve for a power shift transmission without being influenced by a fluctuation of parasitic drag on different transmissions. SOLUTION: A parasitic drag time value Tpara- d representing the speed change of a clutch constitution element by the friction characteristics of a transmission is decided at 498. A target speed change value target decel is calculated at 500 from a parasitic drag time value. By lead-through of a clutch calibration value from the target speed change value, a hold pressure which the hydraulically actuated clutch element of a power shift transmission has is calibrated. |
