Diesel engines operate on the principle of internal combustion, igniting fuel through high compression rather than using spark plugs. During cold starting, the engine faces challenges due to lower temperatures affecting fuel combustion. The four-stroke process begins with the intake stroke, where air is drawn into the cylinder. In the compression stroke, the air is highly compressed, increasing its temperature. At the peak of compression, fuel is injected, igniting spontaneously due to the high temperature. The power stroke follows, driving the piston down, propelling the vehicle. Modern diesel engines use glow plugs or grid heaters to aid cold starting by preheating the air.
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