The Role of Single Cylinder Diesel Engine Fuel Supply Advance Angle

The fuel supply advance angle of a single cylinder diesel engine acts in the diesel engine supply system and has a significant impact on diesel engine performance. Excessively large or small fuel supply advance angles will deteriorate the power and economy of the diesel engine. To ensure good performance of the diesel engine, it must operate under a suitable advance angle environment.

Some debuggers often prefer to set the fuel supply advance angle a bit earlier when adjusting it, and some even exceed the specified value by 2-3 degrees. They believe that setting the fuel supply advance angle earlier will make the engine work with more power. However, Dingbo Power Generator Set Manufacturer will share with you the correct knowledge about the use of diesel engine fuel supply advance angle.

1.What are the hazards of too large or too small fuel supply advance angle for single cylinder diesel engines?

2.Excessive thermal load will cause cracks in the cylinder head and deformation and falling off of the valve seat ring.

3.An excessively early fuel supply advance angle causes too much fuel to accumulate in the cylinder before top dead center. After combustion, the explosion pressure increases significantly, which will increase the mechanical load of the piston connecting rod and cause damage to these components.

4.It will cause knocking, increase the impact of the piston on the cylinder liner, intensify the vibration of the cylinder liner, and lead to fatigue damage of the cylinder liner.

But is it better to have a smaller fuel supply advance angle for single cylinder diesel engines? Actually, it is not the case. A too small advance angle will cause difficulties in starting the diesel engine, power reduction, black smoke emission, increased fuel consumption, increased exhaust temperature and other fault problems. The advance angle should be within an appropriate range. For these faults, as long as we carefully analyze and find out the causes, we can eliminate them in time, so that the diesel engine can return to normal operation.

What is the appropriate degree of fuel supply advance angle for single cylinder diesel engines?

From the above, it can be known that if the fuel supply advance angle does not meet the requirements, it will have a certain impact on the power and economy of the engine. It has been determined that for every 6° change in the fuel supply advance angle, the engine power decreases by 7.33% and the fuel consumption rate increases by 25.79%. So what is the generally more appropriate fuel supply advance angle?

For single cylinder diesel engines, the fuel supply advance angle is generally about 19 degrees, but this data is for reference only. It is more reasonable to adjust the angle with reference to the user manual. After all, different fuel injection pumps selected by various manufacturers will affect the determination of the fuel supply angle to a certain extent.

How to adjust the fuel supply advance angle of single cylinder diesel engines?

Remove the high-pressure oil pipe, turn the outlet of the end connected to the fuel injector to a horizontal position and fasten the oil pipe. Then slowly rotate the flywheel clockwise, and stop rotating the flywheel at the moment when oil just emerges from the outlet of the high-pressure oil pipe. Check the position where the scale on the flywheel aligns with the mark in a timely manner, which is the angle of the fuel supply advance angle. Generally, the fuel supply advance angle is 15°-19°, and the injection advance angle is 7°-9°.

When adjusting the fuel supply advance angle after removing the fuel injection pump, it is necessary to adjust by increasing or decreasing the gasket between the pump body and the gear chamber cover. Under normal circumstances, adding a gasket will reduce the fuel supply advance angle, and removing the gasket will increase the fuel supply advance angle.

Guangxi Dingbo Generator Set Manufacturing Co.,Ltd. was founded in 1974 and is one of the earliest manufacturers of generators and diesel generator sets in China. If you want get more information, please feel free to send email to [email protected] we will pay highly attention on your question.