Spraying characteristics of fuel injector

Injector spray atomization and the shape of the oil beam on the engine work has a great impact, if the oil cambium shape is reasonable, atomization effect is good, then the engine will get a good cold start, smooth idling, less emissions effect. Atomization quality is related to injection pressure, injection position, injector structure, carbon accumulation and other factors.

SPI system, due to the injector installed in the throttle near the fuel injection, fuel injection, in the intake pipe there is a long time of atomization process, so the mine fuel pressure is low: and for the MPI system, the injector is generally installed in the intake pipe or cylinder head, because it is toward the intake valve injection fuel, atomization time is short, in order to ensure a good atomization, the oil pressure should be increased accordingly. In order to improve the quality of atomization, needle valve injector using the end of the finishing cone, so that the fuel to about 10 ° ~ 40 ° spray angle, the sharp edges of the cone end to promote the atomization of fuel, atomization device more azalea-needle type, in the dual-intake valve engine, dual-hole injector can be hooked to the two intake valves are injected with fuel, is also widely used.