The same type of EFI vehicles, gasoline pump pressure is constant, regardless of solar term door opening size, as long as the fuel pressure regulator regulator, nozzle pressure is always constant. Fuel injector and the fuel pump and fuel pressure regulator strictly matched, only the design pressure, nozzle in order to achieve the best effect of atomization, pressure is lower than the design pressure, spray not fog, columnar, should not be mixed with air; the pressure is too large, spray cone shape, also not easy to mix, and the power of jet is too large, a lot of direct fuel is sprayed to the wall, directly affect the mixing ratio parameter. Whether the acceleration or speed, pressure should be constant. Different types of pressure is also each not same ( a friend mentioned cleaning machine several block selection, is actually for different models of pressure, not speed idling pressure difference, error chose injection pressure, atomizing nozzle side ).

The amount of fuel injection nozzle , depending on the length of the fuel injectors. Injector control by electromagnetic coils in different ways, the divided voltage driving type and current driving type two. Voltage type also has low resistance and high resistance, high resistance can take 12V power, low resistance then the only low voltage, then the 12V wrong for a long time, the coil will burn. Fuel injection, the computer voltage is constant, for example 12V, off the oil when immediately changed to 0V, this change is instantaneous, as is the computer language in 0 and 1 a concept, not the middle of that 0.5. In other words, this is a pulsating DC signal, no alternating current and so on a category of the noun. Alternating current what concept? Positive and negative stagger is alternating current. As of a car in the previous part of generator rectifier, basically do not contact AC. When the nozzle is blocked, the injection is not smooth, or the nozzle gap with carbon and binder, is not up to the design of injection quantity or atomization effect, need cleaning.