| 摘要 |
<p>PURPOSE:To eliminate the stick/slip phenomenon of a clutch plate and prevent the generation of torsional vibration of a driving system by making slipping control, while avoiding the use in a range of low slip ratio, of a slipping clutch for driving a water feed pump, etc. CONSTITUTION:When the discharge pressure of a water feed pump 3 is lowered, a rotation command signal 24 from a PID controller 23 starts to increase, increasing a current which is fed to the solenoid 28 of a rotating speed control valve 27. Accordingly, a clutch operating pressure is increased and the slip ratio of a slipping clutch 2 is reduced, increasing the discharge pressure of the pump 3. The rotation command signal 24 is always compared with a 5-% set signal 35 corresponding to the 5-% slip ratio of the clutch 2 and an 8-% set signal 37 corresponding to its 8-% slip ratio by a comparator 33. And, when the signal 24 is increased above the signal 35, a switchover signal 38 is outputted from the comparator 33 and given to a solenoid 41 and the signal 24 is switched over to a direct connecting signal 44 and outputted to the solenoid 28. This maximum value signal is received by the control valve 27 to keep the direct connecting condition of the clutch 2.</p> |
