| 摘要 |
<p>PROBLEM TO BE SOLVED: To reliably prevent the occurrence of engagement of a clutch during disconnection of a proportional solenoid valve under waiting for the starting of a vehicle and to prevent the occurrence of an engine stop. SOLUTION: An energization indication value (an indication voltage) from a CPU 8 is monitored by an indication voltage deciding part 12. A real current flowing through the coil 4a of a proportional solenoid valve 4 is monitored by a current zero deciding part 13. When, during waiting for the starting of a vehicle, a clutch is brought into a half clutch waiting state, it is decided that the coil 4a is disconnected. In this case, the current zero deciding part 13 immediately obtains a decision result that a real current flowing through the coil 4a is zero. An AND circuit 14 receives a decision result that energization indication is outputted and receives a decision result from the current zero deciding part 13, and outputs a drive command to a drive circuit 11. The output of the drive command effects immediate energization to a solenoid valve 5 for emergency and a clutch is disengaged before it is moved to engagement side.</p> |
