Why is it important to adjust the fuel supply advance angle of diesel generator set correctly?

The oil supply advance angle is an important parameter that affects the performance of diesel generator sets. Different types of diesel engines have different requirements on the size of the oil supply advance angle, and the injection pump must strictly ensure that the oil supply starts at the specified moment. To understand the oil supply advance angle, we must first understand the concept of oil supply timing, oil supply timing refers to the correct timing of oil supply for the injection pump, the four working strokes of the four-stroke diesel generator are air intake, compression, work, exhaust, the correct timing of oil supply for the injection pump should be before the upper stop of piston compression. In order to accurately describe the beginning of the oil supply moment, the concept of oil supply advance angle is introduced, which is the crankshaft angle from the beginning of the oil supply point to the piston reaching the compression upper stop. The best oil supply advance angle is determined by the diesel engine manufacturer according to the engine performance test results. Different manufacturers, different models of diesel engine oil supply advance angle size is different, the oil supply advance angle check and adjustment should be based on the data given by the manufacturer.

 

The harm of too big or too small oil supply advance angle

 

The oil supply advance angle is one of the important factors affecting the working process of diesel generator set, too big or too small will lead to abnormal work of the set. Oil supply advance angle is too large, that is, the timing of oil supply is too early, will lead to engine starting difficulties, running noise, crankshaft easy to reverse, power, economy decline; oil supply advance angle is too small, that is, the timing of oil supply is too late, will lead to exhaust smoke, engine overheating, power, economy decline.

 

Checking timing of fuel supply advance angle

 

The inspection timing of diesel engine oil supply advance angle is roughly 3 kinds as follows.

 

1. when the above-mentioned oil supply advance angle is too large or too small during the use of the engine, resulting in abnormal working conditions.

 

2. when the injection pump is re-installed after the commissioning and maintenance and its drive mechanism drive parts are disassembled and re-installed.

 

3. The implementation of the three-stage maintenance of diesel engines.

 

For multi-cylinder injection pump, such as injection pump camshaft position has been set, and some cylinders have differences in the oil supply moment, it is necessary to adjust the adjustment mechanism of each sub-pump, the specific adjustment method varies depending on the structure.