| 摘要 |
PURPOSE: To prevent engine stalling regardless of temporary shutoff of a battery during engine operation by having power supply at time of inputting ON signal from a key circuit and so inputting an engine start permission signal, and preparing for inputting a next engine start permission signal at time of an ON signal from the key circuit and thus shutting off a power supply circuit. CONSTITUTION: When a key switch circuit 2 is turned ON, a transistor 75 is turned ON by an OR gate in an engine control portion 7 so that a relay contact 8b is turned ON. Then supply voltage is supplied from a battery 1 to constant voltage circuits 71, 61, respectively, of the engine control portion 7 and antitheft portion 6. Then, CPU 72 is operated, so that an H signal is outputted to the OR gate 74. When the key switch circuit 2 is turned OFF, inputs are made to the OR gate 74 and CPU 72, while the transistor 75 is turned OFF and a power supply relay 8 is turned OFF. Accordingly, one key switch ON information is inputted, operation of CPU 72 continues even when battery voltage is shut off temporarily, unless turning OFF is not made. |
