| 摘要 |
<p>PURPOSE:To prevent dangers caused by generation of heat or reckless driving of an output shaft by detecting a change with the passage of time of an exciting current supplied to a clutch coil a fixed time later to detect a clutch gap. CONSTITUTION:A control circuit 15 commands a pulse generator 16 to generate a pulse having a time width T1, and the pulse generator 16 attracts a clutch coil 6 through a driver 17 only during the time T1. The time T1 is the time required fo bringing a clutch lining 7 into contact with a clutch friction member 2. After a time T when there is no clutch coil current flowing through fly wheel circuits D2 and R1, the clutch coil 6 is excited only during a time T. After the time T, a microcomputer 21 judges that if a signal Vb is H, it is normal, and if it is L, a gap is small.</p> |
