| 摘要 |
<p>PURPOSE:To secure the supply of the power source electric power to a traveling system load even if anomaly is generated in the power source line for the traveling system load by connecting a plurality of power source lines with the traveling system load and a common system load, and selecting the electric power supplied by one power source line so as to be supplied to the traveling system load. CONSTITUTION:In the ordinary case, power source electric power is supplied to a traveling system load 4A and a common system load 5A through the first and second electric power source lines 2 and 3. In case of anomaly, if short-circuit is generated, for example, in the first power source line 2, and the supply of the power source electric power is disabled, the CPU 10 of a control unit 6A detects this fact, and a relay coil 9d is energized. Then, an always opened contact point 9b is closed by the selecting piece 9c of a selecting relay 9. Accordingly, the power source electric power is supplied to the traveling system load 4A through the second power source line 3. Accordingly, the second power source line 3 is used in common for the supply of power source electric power to the common system load 5A in the ordinary case and the supply of the power source electric power to the traveling system load 4A in the anomaly case.</p> |
