High Quality Diesel Fuel Injector Nozzle Dlla321n413

It represents the latest development direction of electronic fuel injection technology of diesel engine and is the main trend of diesel fuel system development. The research and development of the measurement device for diesel high pressure common rail fuel injector in our country is still in its infancy stage. Coupled with the fact that the development of diesel engine vehicles in our country has a certain lag compared with foreign countries, most oil injector testing equipment are still in the stage of detecting traditional oil injector. Equipment and core test device mainly rely on foreign intake. Therefore, the development of common rail injector detection device is relatively slow. With the popularity of diesel high pressure common rail system vehicles, and the price of foreign testing equipment is generally too high, it is urgent to develop domestic common rail injector testing equipment.

The fuel injector is an important part of fuel injection in the fuel supply system of diesel engine. Its function is to atomize the fuel into tiny oil droplets and spray them to specific parts of the combustion chamber according to the characteristics of the diesel mixture formation. The nozzle coupling composed of needle valve and needle valve body is a precise coupling in diesel fuel supply system, and its performance and life is an important index related to the service performance of diesel engine. And the working condition of the nozzle is poor, its interior is affected by the pulsating high-pressure fuel, and the head is in direct contact with high temperature and high pressure gas. Due to mechanical load and thermal load caused by small nozzle deformation enough to seal bad, gas channeling, working disorders. In use, the engine performance is often reduced due to the failure of the fuel injector, and even the engine can not run because of the fracture of the needle valve body. So it is of great significance to analyze the failure of nozzles working under complex conditions.