How to achieve rapid preheating and stable combustion during cold start of electronic fuel injection diesel engine?

The rapid preheating and stable combustion of electronic fuel injection diesel engines during cold start mainly rely on their advanced preheating system and precise fuel injection control technology. The following is a detailed explanation of this process:

Quick preheating

Preheating device:

Electronic fuel injection diesel engines are usually equipped with preheating devices, such as preheating plugs or intake preheaters. The preheating plug is installed on the cylinder head and heated by an electric heating wire to increase the temperature inside the combustion chamber. The intake preheater is installed on the intake pipe and uses the heat generated by resistance wires or fuel combustion to heat the incoming air.

Preheating control:

The operation of the preheating device is usually controlled by the engine control unit (ECU). During cold start, the ECU will detect the temperature of the engine coolant and connect the circuit of the preheating device as needed. The preheating time is usually intelligently adjusted based on the ambient temperature and engine status to ensure the best preheating effect.

Preheating indicator light:

In order to facilitate the driver's understanding of the preheating status, many electronic fuel injection diesel engines are also equipped with preheating indicator lights. When the preheating device is working, the indicator light will light up, indicating that preheating is in progress. After preheating is completed, the indicator light will turn off.

Stable combustion

Fuel injection control:

The fuel injection system of electronic fuel injection diesel engines adopts high-pressure common rail technology, which can accurately control the injection amount and injection time of fuel. During cold start, the ECU will adjust the fuel injection strategy based on the engine's status and preheating condition to ensure that the fuel can be fully atomized and mixed with air.

Ignition timing:

The ignition timing of electronic fuel injection diesel engines is precisely controlled by the ECU. During cold start, the ECU adjusts the ignition timing based on the preheating condition and engine speed to ensure that the fuel ignites at the optimal time, thereby achieving stable combustion.

Fuel quality:

The quality of fuel also has a significant impact on stable combustion during cold start. High quality diesel has better ignition performance and combustion efficiency, which helps reduce emission pollution during cold start and improve combustion stability.

In summary, electronic fuel injection diesel engines achieve rapid preheating and stable combustion during cold start through advanced preheating systems and precise fuel injection control technology. The application of these technologies not only improves the starting performance of the engine, but also reduces emission pollution and extends the service life of the engine.