Numerical simulation of high pressure common rail injector response characteristics
GOU Qingwei
ZHANG Xinmin
ZHAO Chang
ZHANG Xin
Abstract：In order to analyze the influence of structure parameters on high pressure common rail injector response characteristics,this paper takes a particular heavy-duty diesel engine high pres-sure common rail injector as the research object,builds the simulation model by using the AMESim software and verifies the accuracy of the model by experiments.The results show that the increase of the inlet hole diameter will enhance the open response speed of the fuel injector but lower its close response speed.With the acceleration of the fuel injector open response speed,the increase of the control plunger diameter will enhance the close response speed of the fuel injector but lower its open response speed;the increase of needle valve sealing diameter will improve the opening and close response speed at the same time,the increase of the needle valve spring pre-tightening force will prolong the needle valve turn-on time and lower its turn-off time.Therefore, in the process of the injector design,the inlet hole diameter should be chosen carefully,and the outlet hole and needle valve sealing diameter should be increased appropriately.It can be applied as theoretical guidance for the optimization of structural parameters of high pressure common rail injector.
Keywords：diesel enginehigh pressure common rail injectorstructure parametersresponse char-acteristicsAMESim
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 94-100 )