| 摘要 |
PROBLEM TO BE SOLVED: To prevent unnecessary increase in operation stress to constitution members of a constitution group under a frictional engagement by forming the correlation between rotation speed fluctuations and changing the operation states of the constitution group, when a change exceeds a threshold in the correlation. SOLUTION: The drive shaft or transmission input side rotation speed is detected (S54) using an appropriate sensor. At the same time, the transmission output side rotation speed is detected (S56) using an appropriate sensor. The correlation of the measured rotation speeds is calculated (S58) by execution of a filter. Whether the correlation value periodically calculated in a prescribed time window exceeds a prescribed value or not is detected (S60). Where exceeding the prescribed limit value, a measurement and calculation loop is newly started. Where not exceeding the prescribed limit value, a flag is set (S62), which triggers a prescribed means, for example rise in the pressure force. And a new measurement and correlation cycle are executed. |
