Knowledge of Fuel Supply System for Shangchai Generator Set 2

Today we will continue to introduce the knowledge of fuel supply system for Shangchai generator set.

3.Injector

A mechanical P - type injector is used.

The injector is mainly composed of an injector housing, an injector nozzle couple, a pressure - regulating spring, etc. The opening pressure of the injector is determined by the pre - tightening force of the pressure - regulating spring. The pre - tightening force can be adjusted by changing the thickness of the gasket on the spring seat. The opening pressure is 26 - 27 MPa.

When disassembling and assembling the injector, it should be reinstalled corresponding to each cylinder and not be mixed up. When replacing the sealing gasket, one with the same thickness should be selected. Otherwise, it will affect the protrusion height of the nozzle and the performance of the diesel engine. Due to the four - valve structure, the injector is arranged in the center of the cylinder, which can ensure better mixture formation and combustion. The spray pattern and atomization of the injector should be normal, and there should be no oil dripping.

Special reminder: This injector is made of special materials and processed through special treatment. Although it looks similar to a conventional injector, its performance and pressure - resistance strength are quite different. Therefore, it must not be replaced with a conventional part to avoid accidents and damage to the engine.

Warning: It is strictly forbidden to touch the injector spray with hands or other parts of the body.

4. Exhaust of the fuel supply system

When the diesel engine is working normally, there should be no air in the pipeline of the fuel supply system. Otherwise, the engine will be difficult to start. For a new engine or an engine that has been parked for a long time, the air should be exhausted before starting. The method is to loosen the oil - outlet joint of the diesel filter in sequence, continuously press the manual pump until no bubbles emerge, and then tighten the joint.

5. High - pressure oil pipe

Special reminder: The electronically - controlled unit pump engine uses a special high - pressure oil pipe, which is made of special materials and processed through special treatment. It is strictly forbidden to replace it with a conventional part to avoid safety accidents and damage to the engine.

6. Fuel filter

The electronically - controlled unit pump engine has high requirements for fuel cleanliness and uses two - stage special high - efficiency fuel filters.

The diesel filter has a paper - element rotary type. The whole filter element of the diesel filter should be replaced regularly to avoid insufficient fuel supply caused by excessive filter - element resistance. When installing the filter element, the filter element should be filled with clean diesel first to avoid starting difficulties and unstable operation caused by air entering the fuel system. Then, lubricate the rubber sealing ring with a small amount of clean engine oil, and then install the cartridge - type filter element (after the sealing ring is basically in contact with the base, tighten it by 3/4 - 1 turn). The filter replacement cycle should be carried out in accordance with the maintenance regulations of the diesel engine.

The water accumulation in the water - collection cup of the fuel pre - filter must be observed and drained every day. Special reminders:

1.Only by using a qualified diesel filter can the cleanliness of the fuel be ensured and engine failures be reduced. Please be sure to use a filter specially designed for Yuchai or approved by Yuchai.

2.Strictly follow the maintenance instructions for maintenance.

Today's sharing of knowledge about the fuel supply system of diesel generators hopes to help everyone have a good understanding of diesel generators.

Dingbo Power 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.