The main reasons for the melting of fuel injectors in
diesel generator include the following aspects:
Long term idling operation: When a diesel engine is idling for a long time, due to the low temperature inside the cylinder and insufficient fuel combustion, carbon deposits are easily formed on the fuel injector and combustion chamber, leading to deterioration of the working conditions of the fuel injector. Prolonged idling can cause the fuel injector to melt.
Unclean fuel: Small particles and impurities in the fuel may wear down the needle valve and needle valve body at the fuel injector, causing the injector to become stuck or drip, resulting in poor fuel atomization, reduced combustion speed, prolonged combustion time at the injector, and ultimately causing the injector to melt.
Injecting too late: A too small injection advance angle can lead to a too late injection time, deterioration of fuel combustion conditions, and local high temperatures can cause the fuel injector and insulation sleeve to burn out.
Improper assembly: If the insulation sleeve of the fuel injector is not clean or installed correctly, it may cause the fuel injector to melt. In addition, if the insulation sheath is installed too tightly or too loosely, it will also affect the working condition of the fuel injector.
The impact of cold weather: In cold weather conditions, the fluidity of fuel and oil deteriorates, which may cause poor fuel supply or lubrication of the fuel injector, leading to nozzle melting.
Improper use: Diesel generators lack coolant during operation, causing high temperatures in the combustion chamber due to poor cooling, which is also an important reason for fuel injector melting.
Preventive measures include:
Regular inspection and maintenance: Regularly check the operation status of the diesel generator set, including the working condition of the fuel injectors, clean up carbon deposits and replace damaged components in a timely manner.
Use qualified fuel and oil: Select fuel and oil that meet the requirements and have reliable quality, and avoid using inferior or expired products.
Control idle running time: Try to avoid prolonged idle running. If you need to park for a long time, you can turn off the engine to reduce the burden on the fuel injectors.
Maintain good ventilation in the engine room: Poor ventilation in the engine room may affect the heat dissipation effect of the diesel engine, leading to overheating of components such as fuel injectors.
Regular cleaning and replacement of filters: Regularly clean or replace components such as air filters and fuel filters to avoid nozzle malfunctions caused by blockage or contamination.
