1. The fuel injector is a precision device with very high machining accuracy, which requires a large dynamic flow range, strong anti-clogging and anti-pollution capabilities, and good atomization performance. Accept the fuel injection pulse signal sent by the injector ECU to precisely control the fuel injection amount.
2. The spray characteristics of the injector include atomization particle size, oil mist distribution, oil beam direction, range and diffusion cone angle, etc. These characteristics should meet the requirements of the diesel engine combustion system, so that the formation and combustion of the mixture can be perfected, and higher power and thermal efficiency can be obtained.
3. The injector is divided into two types: open type and closed type. Open injectors are simple in structure, but have poor atomization and are rarely used. Closed fuel injectors are widely used in various diesel engines. Diesel engines take in pure air on the intake stroke. At the end of the compression stroke, the oil pressure of the diesel oil is raised to more than 100MPa by the fuel injection pump, and then injected into the cylinder by the fuel injector, and mixed with the compressed high-temperature air in a short time to form a combustible mixture.
4. The working principle of the fuel injector is that the fuel injection system of the diesel engine atomizes the fuel and distributes it in the combustion chamber to mix with the air. It mainly consists of an injector and an injector body, and its mounting position and angle on the cylinder head depends on the design of the combustion chamber.
