| 摘要 |
PROBLEM TO BE SOLVED: To surely detect a defective action without additional and large labor and time by detecting a timewise change of the location of an actuator based on prescribed current supply and detecting a deviation between a measured timewise change and a target value as a defect. SOLUTION: A pressure plate 18 of a clutch 4 can be dissociated from a frictional engagement to a clutch disc 16 by an operating lever 20. An actuator 24 is provided to operate the operating lever 20 and this actuator 24 is controlled by an electronic control device 26. A position sensor 28 for detecting the location of the actuator 24 or the operating lever 20 is connected with the control device 26. For a diagnostic purpose, voltage pulses of fixed heights and current by a prescribed pulse width are supplied to the actuator 24, for instance, and a motion of the operating lever 20 is analyzed by the position sensor 28. When a timewise result of an exit signal of the position sensor 28 is deviated from a target process, the result is detected as a defect and the result is displayed on the control device 26 or a defect display device of a diagnostic device connected with this control device 26. |
