| 摘要 |
<p>A circuit for controlling the voltage applied to a glow plug used to assist the starting of a diesel engine, the circuit including a circuit network composed of a normally-closed relay contact connected in parallel with a serially connected voltage-dropping resistor and a normally-open relay contact, the circuit being serially connected with the heating element of the glow plug and with a power supply for producing the voltage, and a timer connected to the power supply. The normally-closed relay contact is opened when the temperature of the heating element exceeds a preset value which is below a steady-state heating temperature, and the normally-open relay contact is closed by the timer a predetermined time after voltage is applied to the glow plug, whereby the glow plug is heated rapidly. In the event of an abnormal rise in power supply voltage during the rapid heating of the glow plug, the supply of current to the glow plug is interrupted temporarily to prevent glow plug burn-out.</p> |
