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System of preheat of the diesel engine

Overview

In order to achieve the desired temperature in the cylinders ignition compressible cold engine air-fuel mixture system is used glow plug.

In the combustion chamber of each cylinder is screwed a special candle, consisting of a body molded into a heating element formed by the two spirals: heating and control. After the voltage in the heating coil heats the rod for a few seconds to a temperature of + 850 ?� C, the current flowing through the spark plug reaches 30A. With increasing degree of warming increases and the resistance of the spiral, thereby reducing the current to a value of 15 - 25 A. By disabling the control of incandescent lamps on the instrument panel goes off can be carried out starting the engine.

The time spent on pre-heating cylinders, is not more than 10 seconds, and governed by a special relay and the engine control module (ECM), through the coolant temperature sensor (ECT) to obtain information about the current engine temperature. Based on the analysis of the data ECM controls the duration of the system operating current lamps and heating.

On diesel engines with direct injection need for glow plug it occurs only at temperatures below 0 ?� C.