Methods for Detecting the Quality of Fuel Injectors

The fuel injector is an important part of the diesel engine fuel supply system to realize fuel injection. Its function is to atomize the fuel into tiny droplets according to the characteristics of the diesel engine mixture formation, and inject them to specific parts of the combustion chamber, so that the engine can start normally. However, once the fuel injector fails, the engine cannot be started, which affects the normal operation of the vehicle or machinery. So how should we check whether the fuel injector is good or bad? Now Megicar Auto Parts Co.,Ltd makes a simple analysis for you.

1. Special equipment inspection: remove the fuel injector and take it to the fuel injector test bench for inspection. If the detected injection pressure fails to meet the corresponding technical standards, the atomization of the injector is poor, there is oil dripping or leakage, and the injector cannot be recovered after cleaning and adjustment, the injector is faulty.

2. Judge whether the fuel injector is good or bad by the difficulty of starting the cold engine and the exhaust smoke color after starting: it is difficult to start the cold engine, and the exhaust smoke color after starting has white smoke or black smoke. If the fuel supply angle and cylinder pressure are normal, the fuel injector may be faulty.

3. Cylinder cut-off method: After the engine is started, maintain a stable speed, and then loosen the high-pressure fuel pipes one by one to see if the engine speed changes. If the generator speed drops significantly after the cylinder is cut off, it means that the combustion of this cylinder has an effect on the engine, and the injector of this cylinder is good. If the rotation speed of the generator does not decrease significantly after the cylinder is cut off, it means that the combustion of this cylinder has no effect on the engine, and the white smoke or black smoke of the engine is less, it means that the injector of this cylinder is broken.

4. Remove the fuel injector. If the fuel injector has a lot of carbon and is wet, the fuel injector will not work well.

5. If it is found that the engine oil becomes thin and the engine oil smells of diesel, it is often related to injector failure.

Megicar Auto Parts Co.,Ltd is a professional supplier and manufacturer of common-rail fuel injector in China. We are keen to develop customers who need fuel injectors worldwide and provide our good products to Achieve long-term cooperation.