Journal of Advanced Marine Engineering and Technology

The Korean Society of Marine Engineering (한국마린엔지니어링학회)
권호 표지
DOI QR코드

DOI QR Code

An usefulness study on estimation and control method of EGR ratio using intake manifold pressure in an gasoline engine

가솔린엔진에서 흡기관 압력을 이용한 EGR율의 추정 및 제어 방법에 관한 유용성 연구

  • Received : 2014.04.17
  • Accepted : 2014.08.01
  • Published : 2014.09.30
Download PDF
⟨ Previous Next ⟩

Abstract

The EGR system being reburned the part of the exhaust gas through intake system indicates more favorable emission characteristics to reduce NOx in a gasoline engine, but the case of inappropriate exhaust gas quantity induced from engine is fallen engine power caused by unstable combustion. In this study, we examined a method to predict EGR ratio according to various engine operation condition based by intake manifold pressure and confirmed such a prediction data through an experimental method. And after having constituted feedback EGR control algorithm in a base with such a prediction data, we acquired qualitatively similar results by having compared data provided through an EGR feedback control experiment with the data which calculated quantity of residual gas for the engine operation condition. Therefore, the applied algorithm and the system for feedback EGR control showed feasibility applied to real electronic control EGR technology.

가솔린엔진에서 흡기계를 통하여 배기가스의 일부를 재연소시키는 EGR시스템은 NOx를 저감하기 위하여 양호한 배기배출특성을 나타내지만, 엔진으로 유입되는 배기가스량이 적절하지 않을 경우 불안정한 연소를 일으켜 엔진의 출력이 저하된다. 본 연구에서는 흡기관압력을 바탕으로 다양한 엔진운전조건에 따른 EGR율을 예측하는 방법을 검토하고, 이러한 예측자료를 실험적 방법을 통하여 확인하였다. 그리고 이러한 예측자료를 바탕으로 피드백 EGR제어 알고리즘을 구성한 후, 엔진운전조건에 대한 잔류 가스량을 계산한 데이터와 EGR 피드백 제어실험을 통해 얻어진 데이터를 비교한 결과를 통하여 정성적으로 유사한 결과치를 얻었다. 따라서 적용된 피드백 EGR제어 알고리즘 및 시스템은 실제 전자제어식 EGR기술에 응용될 실현 가능성을 보여주었다.

Keywords

References

  1. L. Berry, "Improved control of EGR during speed/load transients," Society of Automotive Engineers Technical Paper 960068, 1996.
  2. D. J. Boam and I. C. Finlay, "A model for predicting engine response during rapid throttle transients in port-injected spark-ignition engine," Society of Automotive Engineers Paper 890565, 1989.
  3. C. W. Kim, H. C. Noh, D. H. Kim, T. B. O. Yom, and S. K. Kim, "Combustion performance spark ignition in vehicle engine with EGR controller," Proceedings of the Korean Society of Mechanical Engineers Spring Conference, pp. 246-253, 2011 (in Korean).
  4. H. J. Gong, I. G. Hwang, A. H. Ko, C. L. Myung, S. S. Park, and C.-S. Lim, "Effect of EGR rate and injection timing on the characteristics of exhaust emission in light-duty diesel engine," Transactions of Korean Society of Automotive Engineers, vol. 20, no. 3, pp. 7-12, 2012 (in Korean). https://doi.org/10.7467/KSAE.2012.20.3.007
  5. K. T. Yeom, Y. M. Woo, J. Y. Jang, Y. K. Park, and C. S. Bae, "Performance and emission characteristics of lquid-pase LPG Injection Engine with dfferent EGR rate," Transactions of Korean Society of Automotive Engineers, vol. 11, no. 5, pp. 7-14, 2003 (in Korean).
  6. S. M. Park, S. I. Yoo, K. H. Kang, and K. H. Nam, "A development on the EGR flow rate model for passenger diesel engine," Proceedings of the Korean Society of Automotive Engineers Spring Conference, pp. 53, 2013 (in Korean).
  7. J. H. Park, J. H. Lim, and J. K. Yoon, "A study on the engine performance and emission characteristics in a LP EGR system with electronics throttle control," Journal of the Korean Society of Marine Engineering, vol. 35, no. 4, pp. 379-387, 2011 (in Korean). https://doi.org/10.5916/jkosme.2011.35.4.379
  8. J. W. Fox, W. K. Cheng, and J. B. Heywood, "A model for predicting residual gas fraction in spark-ignition engines," Society of Automotive Engineers Technical Paper 931025, 1993.
  9. B. P. Albert and J. B. Ghandhi, "Residual gas measurements in a utility engine," Society of Automotive Engineers Technical Paper 2004-32-0029, 2004.
  10. J. W. Chung, J. H. Kang, M. H. Kim, S. J. Jeong, B. S. Kim, and W. Kang, "A study on the prediction of EGR rate of a turbocharged diesel engine with intake and exhaust pressure," Proceedings of the Korean Society of Automotive Engineers 30th anniversary, pp. 506-511, 2008 (in Korean).
  11. I. Y. Ohm and C. J. Park, "Air fuel ratio and calculation according to fuel composition(III)," Transactions of the Korean Society of Mechanical Engineers B, vol. 28, no. 10, pp. 1147-1154, 2004 (in Korean). https://doi.org/10.3795/KSME-B.2004.28.10.1147