The Influence of Thickness on Diesel Engine Fuel Injector Gasket

The thickness of the diesel fuel injector gasket has a significant impact on the performance of the engine. If the fuel injector gasket is too thick, it may cause the nozzle to be installed too close to the cylinder head plane, and the distance between the nozzle and the combustion chamber is relatively far, resulting in uneven mixing of the combustible mixture and incomplete combustion, which may cause the engine to emit black smoke and reduce power. On the other hand, if the fuel injector gasket is too thin, the distance between the nozzle and the cylinder head plane will be further when installing the fuel injector, and the distance between the nozzle and the combustion chamber will be closer. The formation of combustible mixture will be relatively early, and the possibility of causing detonation during combustion will be higher. The rate of pressure increase will be higher, and in severe cases, it will cause a shortened service life of the engine.

The change of injector gasket thickness will change the position of the nozzle in the combustion chamber, directly affect the position of the fuel spray falling point, the quality of spray and the formation of mixture, and have an important impact on the entire fuel injection system and the overall performance. The thickness of the fuel injector gasket will affect the height of the fuel injector nozzle that extends out of the cylinder head and into the combustion chamber, which is related to the atomization of fuel and the landing position of the fuel beam. It plays an important role in the formation of the mixture and the combustion process.

In addition, if the engine cylinder gasket is too thick, it will cause a decrease in compression ratio and make it difficult to start the engine; The use of copper gaskets between the mating surface of the fuel injector and the cylinder head, such as asbestos gaskets, can easily cause poor heat dissipation of the fuel injector and lead to erosion; The gasket between the joint surface of the diesel engine oil pump and fuel injection pump is too thick, which can lead to insufficient fuel delivery volume and pressure, and a decrease in diesel engine power; If spring pads, locking pads, and sealing pads are missing, resulting in loose joints and easy occurrence of looseness or oil leakage; Forgetting to open a hole in the middle of the gasket can lead to blockages in the oil and water channels, as well as frequent occurrences of engine tile burning, shaft sticking, and water tank boiling.