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http://dx.doi.org/10.7842/kigas.2016.20.4.1

Simulation Study for the Performance Improvement of the Injector Module for Heavy-duty CNG Engines  

Kim, Yong-Rae (Dept. of Engine Research, Korea Institute of Machinery and Materials)
Park, Won-A (Dept. of Engine Research, Korea Institute of Machinery and Materials)
Kim, Chang-Gi (Dept. of Engine Research, Korea Institute of Machinery and Materials)
Lee, Jang-Hee (Dept. of Engine Research, Korea Institute of Machinery and Materials)
Publication Information
Journal of the Korean Institute of Gas / v.20, no.4, 2016 , pp. 1-6 More about this Journal
Abstract
A fuel supply system of heavy-duty CNG engine is composed as a module structure which is integrated by about 6 injectors. There are only one input and output passage for gas fuel supply in this injector module. The response performance for transient operation of an CNG engine is very poor because only one output fuel supply line is connected to the intake pipe after a throttle valve. In this study, a new guideline and internal flow design for the CNG injector module is suggested for the improvement of response performance by fluid dynamic simulations. As a result, the response performance of gas fuel supply can be improved by decreasing the total volume of internal flow passages and a same distance design from each injector to the exit of module shows good response performance and acquirement of linearity of fuel supply. But the injection order has little influence to injection performances.
Keywords
heave-duty CNG engine; module structure; injector; internal flow design;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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