Diesel Injector Fuel Injector 0445120115 Bosch for Case New Holland, Cummins Engine Cr/Ifl26/Ziris10s

Denso fuel injector

(1) Continue to use and improve the control orifice structure to further reduce the fuel injection interval. Compared with G4S, G4.5S improves the transient hydraulic characteristics of the two-way valve when the movable control orifice is opened, so that the pressure in the control chamber reaches and maintains a lower level, so that the next needle valve can be quickly closed. open. It is estimated that the fuel injection interval of G4.5S can reach 0.1ms in the future, and the fourth-generation piezoelectric injector G4P can realize no fuel injection interval.
(2) Reduce the nozzle hole diameter of the fuel injector and improve the structure of the nozzle hole, thereby improving the diffusibility of the spray. In order to achieve high diffusion and low penetration at low rail pressure, and at the same time to achieve the same strong penetration at high rail pressure as ordinary fuel injectors, Denso Corporation has developed a nozzle with an aspect ratio of 0.1x0.8 mm Short orifice or special-shaped nozzle (CDS, Controlled Diffusive Spray Nozzle) to achieve the desired spray diffusion effect
(3) Improve the i-art function to realize the detection of pre-injection and main injection injection rates. At the same time, the change of sound velocity can be obtained by measuring the phase of the pressure wave after the injection is completed, so as to obtain the fuel density. Then the kinematic viscosity is obtained through the known relationship between the n-cetane number of the fuel and the relationship between the density and the dynamic viscosity, so as to realize the correction of the flow rate of the injected fuel, etc.