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http://dx.doi.org/10.15435/JILASSKR.2019.24.3.114

A Computer Simulation of Injection Rate Characteristics of Solenoid Type Common Rail Injector According to Injector Driving Current Patterns  

Lee, Choong Hoon (서울과학기술대학교 기계자동차공학과)
Publication Information
Journal of ILASS-Korea / v.24, no.3, 2019 , pp. 114-121 More about this Journal
Abstract
The effect of injector driving current pattern on fuel injection rate of solenoid diesel common rail injector was studied by computer simulation. The time resolved fuel injection rate and injected quantity per stroke of a common rail injector driven with the five current patterns were computer simulated. The fuel injection rate and injected quantity per stroke according to the rail pressure and fuel injection period were also computer simulated. When the common rail injector was driven with the five driving current patterns of peak & hold, there was no difference in the fuel injection rate in the peak section regardless of all the current patterns of the five cases. On the other hand, the magnitude of the hold current value influenced the injection rate and injected quantity per stroke. That is, in the current pattern of three cases where the hold current value is equal to or more than a constant value of the peak current value, the fuel injection rates for the given common rail rail pressure and injection period are same one another. On the other hand, the current pattern of the two cases, in which the hold current value is smaller than a certain value, there is a large fluctuation in the fuel injection rate.
Keywords
Solenoid type common rail injector; Fuel injection rate; Current pattern; Peak and hold;
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