| 摘要 |
PURPOSE:To enable control for a solenoid pump to be performed with a micro- computer in a combustion control circuit of the main body by a method wherein an adjusting element for adjusting the property of the unit of the solenoid pump is connected to the solenoid coil and the driving circuit for the solenoid pump is assembled in the combustion circuit for the main body. CONSTITUTION:A discharging property adjusting element VR11 is connected to a solenoid coil L for operating the plunger of the solenoid pump P for forcedly feeding the liquid fuel to an evaporator, a switching element S for turning on or off directly the solenoid coil L is arranged in a pump driving circuit for turning on or off the solenoid coil L so as to make a direct control of the switching element S with a control signal for the micro-computer in the combustion control circuit for the main body. Energization and stop of the solenoid pump P feeds a pulse signal in the micro-computer to the base terminal of a transistor Tr11 at the time when a thermistor of the evaporator and controls it, thereby the turning-on or -off of the switching element is initiated, and when a difference in temperature between the thermistor for the chamber temperature and the chamber temperature setting unit is high, the frequency of the turning-on or -off of the switching element S is increased and the solenoid pump P is forcedly controlled. |
