Journal of ILASS-Korea (한국분무공학회지)

Institute for Liquid Atomization and Spray Systems-Korea (한국분무공학회)
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Numerical and Experimental Study to Improve Thermal Sensitivity and Flow Control Accuracy of Electronic Thermostat in the Engine for Hybrid Vehicle

하이브리드 자동차용 엔진 내부의 전자식 수온조절기의 감온성 및 유량제어 정확도 향상을 위한 수치 및 실험적 연구

  • 정수진 (한국자동차연구원 강소특구지원단) ;
  • 정진우 (인지컨트롤스 TMS개발실) ;
  • 하승찬 (인지컨트롤스 TMS개발실)
  • Received : 2021.08.26
  • Accepted : 2021.09.14
  • Published : 2021.09.30
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Abstract

High-efficient HEV Engine cooling systems reflects variable coolant temperature because it can decrease the hydrodynamic frictional losses of lubricated engine parts in light duty conditions. In order to safely raise the operating temperature of passenger cars to a constant higher level, and thus optimize combustion and all accompanying factors, a new thermostat technology was developed : the electronically map-controlled thermostat. In this work, various crystalline plastics such as polyphthalamide (PPA) and polyphenylenesulfide (PPS) mixed with various glass fiber amounts were introduced into plastic fittings of automotive electronic controlled thermostat for the purpose of suppressing influx of coolant into the element and undesirable opening during hot soaking. Skirt was installed around element frame of automotive electronic controlled thermostat for improving thermal sensitivity in terms of response time, hysteresis and melting temperature. To validate the effectiveness and optimum shape of skirt, thermal sensitivity test and three-dimensional CFD simulation have been performed. As a consequence, important improvement in thermal sensitivity with less than 3℃ of maximum coolant temperature between opening and engine inlet was obtained.

Keywords

Acknowledgement

본 연구는 한국산업기술진흥원 주관 "신산업진출 산업재편 핵심기술개발사업(과제번호: P138800011)"의 일 환으로 수행되었으며, 관계자분들께 진심으로 감사드립니다.

References

  1. K. Hwang, I. Hwang, H. Lee, H. Park, H. Choi, K. Lee, W. Kim, H. Kim, B. Han, J. Lee, B. Shin and D. Chae, "Development of New High-Efficiency Kappa 1.6L GDI Engine", SAE 2016-01-0667, 2016.
  2. C. Donn, W. Zulehner, D. D. Ghebru, U. Spicher and M. Honzen, "Experimental Heat Flux Analysis of an Automotive Diesel Engine in Steady-State Operation and During Warm-up", SAE 2011-24-0067, 2011.
  3. H. W. Jeong, H. S. Chan, Y. J. Kim, J. H. Jang, S. K. Kim and S. J. Jeong, "Development of Flow Control Strategy for Improving Thermal Sensitivity of Electronic Thermostat for Downsized GDI Engine", Proceedings of KSAE Autumn Conference, 2017, pp. 88~89.
  4. J. W. Jeong and S-J. Jeong, "Experimental Study to Improve Thermal Sensitivity and Reliability of Electronic Thermostat for Hyundai Kappa Engine", INZI Controls Internal Report, 2017.
  5. S. K. Kim, Y. J. Kim, H. W. Jeong, W. I. Jeong, J. W. Jeong and S. J. Jeong, "Application of Graphene Platelets on Electronic Controlled Thermostat of TGDI Engine for Improving Thermal Sensitivity", Transaction of KSAE, Vol. 25, No. 1, 2017, pp. 66~73. https://doi.org/10.7467/KSAE.2017.25.1.066
  6. G. Liu, H. Guan, Y. Liu, C. Zhang, D. Gao, W. Zhou and J. Knauf, "Influence of Advanced Technology for Thermal Management on SUV", SAE 2016-01-0238, 2016.
  7. M. B. Bigdeli, M. Fasano, A. Cardellini, E. Chivazzo and P. Asinari, "A Review on the Heat and Mass Transfer Phenomena in Nanofluid Coolants with Special Focus on Automotive Applications", Renewable and Sustainable Energy Reviews, Vol. 60, 2016, pp. 1615~1633. https://doi.org/10.1016/j.rser.2016.03.027
  8. S.-J. Jeong, G. Lee, S. Kim, W-S. Choi, "Numerical Modeling and Experimental Validation of an Integrated Coolant Control Valve for the Optimum Design of Coolant Circuit for a Three-Cylinder GDI Engine", Transactions of KSAE, Vol. 26, No. 4, 2018, pp. 540~550. https://doi.org/10.7467/KSAE.2018.26.4.540
  9. G. Liu, Z. Zhao, H. Guan, Y. Liu, C. Zhang, D. Gao, W. Zhou and J. Knauf, "Influence of Advanced Technology for Thermal Management on SUV", SAE 2016-01-0238, 2016.