| 摘要 |
<p>PURPOSE:To reduce the power consumption of the equipments except a CPU by stopping immediately the energization of those equipments when the voltage drop is detected and performing the control operation via the CPU for stop of the drive of said equipments. CONSTITUTION:The voltage of a battery 1 drops gradually with working of an accessory equipment 6 and is equal to a threshold level A' at timing T4. Thus the detection signals are outputted to a main CPU 3, secondary CPU 14 and a driver 15 from a voltage drop detector 2. The CPU 3 starts a saving processing of information in reply to the detection signal. The CPU 14 interrupts the hitherto control actions and the driver 15 stops the energization to the equipment 6. The voltage of the battery 1 rises up temporarily when the energization is stopped to the equipment 6 right after the time point when the voltage of the battery 1 reaches the level A' as shown by a characteristic curve AA. Thus the CPU 3 can perform the control processing for the stop of the equipment 6 despite the disconnection of the equipment 6. As a result, the threshold value needed for comparison of voltage can be set close to the lower limit voltage level of the equipment 6. Then the power consumption of the equipment 6 is reduced.</p> |
