DOI QR코드

DOI QR Code

A Study on Restoration Technology of Unit Injector Spill Valve for Injection System of Commercial Diesel Engine

상용차 디젤의 연료분사장치 유닛 인젝터 핵심부품인 스필 밸브의 성능 복원 관한 연구

  • Lee, Chunggeun (Graduate school of Engineering, Inha University) ;
  • Lee, Jeongho (Department of Mechanical Engineering, Inha University) ;
  • Lee, Daeyup (Department of Mechanical Engineering, Inha University)
  • 이충근 (인하대학교 대학원 건설기계공학과) ;
  • 이정호 (인하대학교 대학원 기계공학과) ;
  • 이대엽 (인하대학교 대학원 기계공학과)
  • Received : 2016.06.03
  • Accepted : 2017.04.12
  • Published : 2017.05.01

Abstract

Restorations of automotive parts have been done ever since the first vehicle was produced. Because the most expensive parts of a vehicle are in the engine system, there have been various restoration methods developed for engine parts. In the case of commercial diesel engines, the fuel injection device is a key and expensive component. It also has a significant effect on vehicle performance. In particular, reduced engine power and increased exhaust gas emissions may result from mechanical damage due to abrasion of the spill valve in the fuel injection system of a diesel engine. In this paper, restoration techniques for damaged parts are applied to restore the abrasion of a spill valve of fuel injection, also called as the "unit injector", of commercial diesel engines. In order to recover the damage, optimized polishing techniques using hard-metal and coating processes are applied. To evaluate restoration techniques for the spill valve, performance and durability tests are performed on a test bench.

Keywords

References

  1. H. S. Mok, C. S. Jeon, C. H. Han, M. J. Song, B. S. Park, H. S. Kwak and S. J. Park, "A Study on Remanufacturing Industry for Automobile Parts," Transactions of KSAE, Vo1.6, No.6, pp.184-191, 2008.
  2. C. G. Nam, H. K. Lee, H. J. Kim, R. M. Kim, H. S. Song, C. S. Ha and C. K. Kang, "A Study of Failure Analysis of used Common Rail Diesel Engine and Performance Comparison Remanufactured Engine," KSAE Spring Conference Proceedings, pp.1048-1054, 2015.
  3. H. K. Lee, J. W. Woo, D. Y. Jung, H. S. Song, C. S. Ha and C. K. Kang, "A Study of Remanufacturing Technolgy for Performance Restoration of used Common Diesel Engine," KSAE Spring Conference Proceedings, pp.1367-1372, 2014.
  4. J. H. Lee and K. H. Choi, A Study on the Activation of Remanufacturing Industry According to the Korean Automobile Cultures, Seoul National University of Science & Technology, pp.229-236, 2013.
  5. H. J. Parkinson and G. Thompson, Systematic Approach to the Planning and Execution of Product Remanufacture, Ph. D. Dissertation, University of Manchester Institute of Science and Technology, Manchester, 2001.
  6. H. J. Parkinson and G. Thompson, "Analysis and Taxonomy of Remanufacturing Industry Practice," Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering, Vol.217, Issue 3, pp.243-256, 2003.
  7. A. Lam, M. Sherwood and L. H. Shu, "FMEA-Based Design for Remanufacture Using Automotive-Remanufacturer Data," SAE 2001-01-0308, 2001.
  8. M. A. Seitz, "A Critical Assessment of Motives for Product Recovery: the Case of Engine Remanufacturing," Journal of Cleaner Production, Vol.15, Issue 11-12, pp.1147-1157, 2007. https://doi.org/10.1016/j.jclepro.2006.05.029
  9. J. B. Bowles, An Assessment of RPN Prioritization in a Failure Modes Effects and Criticality Analysis(FMECA), University of South Carolina, Proceedings Annual Reliability and Maintainability Symposium, 2003.
  10. A. Hassan, I. Dayarian, A. Siadat and J. Y. Dantan, "Cost-based FMEA and ABC Concepts for Manufacturing Process Plan Evaluation," IEEE Conference on Cybernetics and Intelligent Systems, pp.197-202, 2008.
  11. J. H. Kim, H. Y. Jeong and J. S. Park, "Development of the FMECA Process and Analysis Methodology for Railroad System," Int. J. Automotive Technology, Vol.10, No.6, pp.753-759, 2009. https://doi.org/10.1007/s12239-009-0088-z
  12. D. H. Kim, A Study on Friction and Wear Characteristics of DLC Coating Used for Machine Elements/TD 629.11-12-214, 2012.