| 摘要 |
PURPOSE:To prevent excess or shortage of electric conduction and permit the starting operation of the engine at the optimum timing by a method wherein the period of time of conduction for the air heater is determined and controlled by a timer previously set at the optimum timing. CONSTITUTION:When a key switch 1 is thrown into a preheating position H, a controller 2, consisting of micro-computers, sets respective built-in timers To, Th, determining the lighting time of a preheat indicating lamp 5 as well as the preheating time of the air heater 4, puts ON a heater relay 3 to conduct the air heater 4 by an electric source 8 and begins the preheating simultaneously with the lighting of the indicating lamp 5. According to the indication, an operator stops to hold the switch 1 at the preheating position H. When the optimum conducting period of time preset in a RAM211 has elapsed, the preheating indication lamp 5 is put OFF and a start indicating lamp 6 is put ON. The conduction of the air heater 4 is treated logically by OR of timer Th and the throwing time output of start position ST and when it is returned to the position ON by perfect explosion, the conduction of the air heater 4 is stopped. |
