injectors, as the name implies, is a device for injecting fuel injection signal sent from ECU case where the fuel is determined in accordance with. Injector atomization particle size distribution of oil mist, the oil spray characteristics beam direction, and the diffusion cone angle range, belongs to a finishing device.
1. The injector action
is an important component injector fuel injection diesel engine fuel supply system is implemented, its function is formed in accordance with the characteristics of diesel gas mixture, the fuel atomization into fine droplets, and injected into a specific portion of the combustion chamber.
2. Types and Characteristics
Injector generally divided into open and closed two, widely used in automotive diesel fuel injector closed, it is constituted by an injector body and a nozzle pressure regulating device and other components. Closed nozzle injector is a pair of precision coupling, a needle valve needle and body composition. Usually a needle high speed steel good thermal stability, and impact resistance of the needle valve body is of high-quality steel, and after passing through the finishing lapped, with the gap thereof is very small, only 0.002 ~ 0.004mm. Depending on the structure of the injector, the injector is divided into closed-type hole injector, the injector pintle injector and a low inertia three forms, but also the more common case of a former two applications.
First, the hole injectors
on the
hole injectors for direct injection diesel engine combustion chamber. The number of the nozzle head orifice thereof is divided into: the fuel injector hole, two-hole injector and a multi-hole injector (three or more), the number of injection holes is generally about 1 to 7. To prevent coke clogging of the work are easy to process nozzle diameter is not too small, mostly in the range of 0.2 ~ 0.5mm.
Second, the injector pintle
In the pintle injector, the needle extending out of the shaft seal a needle aperture to the outer tapered surface below which passes through the orifice in the needle valve body and protruding slightly outside the needle valve body, i.e., pintle injector injection is hollow, the shape may be an inverted cone or cylinder. The pintle injector having a nozzle diameter, low pressure injection, the injection hole is not easy to coke clogging of injectors and good performance advantages. In general, in addition to the structure of the different nozzle heads, the structure and working principle of the pintle injector hole injectors are similar.
injector fuel supply system is an important component in the diesel engine, the engine is an important step to ensure the normal and orderly work, if the injector fails, the engine can not operate as usual. As the car ldquo; heart rdquo; if you can not work, there is no power source of the car.