| 摘要 |
PROBLEM TO BE SOLVED: To reset a line pressure solenoid SL turned to an unintended off-state at the time of driving a self-starting motor, to a normal regular on-state without resting on a detection circuit of battery voltage. SOLUTION: When a key switch is turned on, an automatic transmission control unit 10 feeds a line pressure solenoid SL with high voltage as line as three seconds and, after having it made into overexcitation, a state of holding excitation is maintained with low voltage, but if such a fact that a self-starting is in driving is judged from the engine speed, it is set to such normal control as repeating those of overexcitation, holding excitation and switch-off at 50Hz. In time of driving the self-starting motor, even if the battery voltage goes down and the line pressure solenoid SL of the holding excitation comes to a state of being turned off, it is quickly reset to a normal regular on-state by the intermittent overexcitation. |
