Journal of the Korean Institute of Gas (한국가스학회지)

The Korean Institute of GAS (한국가스학회)
권호 표지
DOI QR코드

DOI QR Code

A Study on Performance Change of Gas Injector with Ambient Temperature Environment

주변 온도환경 변화에 따른 가스 인젝터 성능 변화에 대한 연구

  • Received : 2018.07.03
  • Accepted : 2018.09.13
  • Published : 2018.10.31
Download PDF
⟨ Previous Next ⟩

Abstract

This study tries to analyze the injection amount of injector according to the external environment temperature of CNG vehicle. Especially, We investigated the effect of low temperature environment on gas injector performance by measuring the variation of injection amount under the same conditions as in coldstart condition. This experimental compared two products with different spring characteristics. The experimental device consist of a fuel supply unit, a flowrate measurement unit, a temperature chamber, and an injector control unit (ECU). According to the test result, the initial injection amount of the injector is increased in the low temperature environment and the needle opening time is delayed according to the change of the spring length.

본 연구에서는 CNG자동차 인젝터의 외부 환경온도에 따른 인젝터의 분사량을 분석하고자 한다. 특히 냉간 시동시와 같은 조건에서 분사량의 변화를 측정하여 저온환경이 가스인젝터 성능에 미치는 영향을 파악하고자 하며, 가스 인젝터 내부의 스프링 특성을 다르게 하여 실험을 진행 하였다. 실험 장치는 연료 공급부, 유량 측정부, 온도 챔버와 인젝터 제어부로 구성하였다. 실험결과를 통해 저온환경일수록 가스인젝터의 초기 분사량이 증가하였으며, 스프링길이 증가에 따른 니들의 열리는 시간(무효분사시간)이 지연됨을 확인하였다.

Keywords

References

  1. Kang, J. H., Choi,S.W., Kim. J. Y., Yeom, J. K., Chung, S. S., and Ha, J. Y., "Comparison of Combustion Characteritics with Port Fuel Injection and Direct Injection in a CNG engine", KSAE, 10, 513-518, (2004)
  2. Haeng, M. C., and Md. I. Mahmud ., "Benefit Analysis of CNG as an Automobile Fuel". The Korean Society Of Clean Technology, 15(1), 1-8, (2009)
  3. Sim, H. S., "Flow Control of a Solenoid Gas Injector and Its Application on a Natural Gas Engine." Journal of the Korean Society of Manufacturing Process Engineers, 8(2), 83-89. (2009)
  4. Heo, S j., Roh, Y. H., Yoon, S. S., and Choi, B. C., "CNG/GSL Bi-fuel System", KSAE, 1(6), 592-597, (2004)
  5. Heo, S j., and Roh, Y. H., "MPI Control System for the Natural Gas Engine", KSAE, 11, 446-451, (2003)
  6. Jo, N. W., Moon, S. J., Nam, C. W., LEE, H. K., and Shin, Y. N., "Research on the Prediction of Injection Rate Using Internal Flow Analysis of CNG Injector", KSAE, 5, 258-259, (2016)