| 摘要 |
PURPOSE:To avoid abnormally dropping the voltage of a battery source, by connecting an intake-air heating device in parallel to a starter in a power source circuit, and by providing a delay circuit so that the starter is energized with a some delay after the energization of the heater. CONSTITUTION:A PCT heater 6 is connected in parallel to a starter 11 in a power source circuit, and is selectively fed with current from a battery source 10 through a stater relay switch 12. A delay circuit 17 composed of resistors 14, 15 and a capacitor 16 is disposed between the switch 12 and the stater 11. Due to the provision of the delay circuit 17 the starter 11 is started to be energized with a some delay after the energization of the PCT heater 6. With this arrangement, it is possible to avoid abnormally dropping the voltage of the battery source. |
