Browse > Article

Evaluation of Inner Flow Characteristics of Oxygen Sensor for Vehicle Exhaust System  

Han, Dae-Kwang (동아대학교 기계공학과)
Suh, Ho-Cheol (세종공업(주))
Yee, Jurng-Jae (동아대학교 건축공학과)
Kang, Jung-Ho (동아대학교 기계공학과)
Han, Seung-Ho (동아대학교 기계공학과)
Publication Information
Journal of the Korean Society of Manufacturing Process Engineers / v.11, no.2, 2012 , pp. 47-54 More about this Journal
Abstract
An oxygen sensor installed in vehicle exhaust systems enables to measure the amount of oxygen in the exhaust gas, in which the measured data are collected and analyzed in ECU(Engine Control Unit). The oxygen sensor is exposed to the high speed exhaust gas at high temperature circumstance, so that protection caps are required not only to protect the susceptible measuring part, but also to provide the real time measurement without time delay. In this study, a new oxygen sensor with one protection cap was proposed, and the CFD analysis was carried out in order to compare the performance characteristics, such as flow speed and ratio of AOA(Age of Air), for the conventional and new oxygen sensor. The numerical results of CFD analysis provided the flow speed of 1.34m/s and the ratio of AOA of 3.43. The similar features obtained from the numerical results showed that the new oxygen sensor guarantees the same performance characteristics of the conventional ones.
Keywords
Vehicle Exhaust System; Oxygen Sensors; Age of Air;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Choi Ji-Ho, Kim Choong-Sik, So Yu-Mi, "Oxygen Sensor Placement and Uniformity Index Study Using Unsteady State CFD Analysis", KSAE Anniversary Conference 2008 Proceedings, Vol. 1, pp. 154-159, 2008.
2 K.S. Chung, H. Han, S.J. Hong, "Effect of supply air temperature and airflow rate on ventilation effeetiveness in an underfloor air conditioning space", Korean Journal of Air-Conditioning, Vol. 10, No. 5, pp. 640-648, 1998.
3 Han Hwa-Taik, Shin Cheol-Yong, Lee In-Bok, Kwon Kyeong-Seok, Kwon Yong-Il, "Estimation of Local Mean Ages of Air in a Room with Multiple Inlets", Proceedings of the SAREK 2009 Summer Annual Conference, pp. 148-153, 2009.
4 Noh Kwang-Chul, Lee Hyeon-Cheol, Park Jung-Ij, Oh Myung-Do, "Evaluation and Prediction of Cleanliness Level in the Mini-Environment System Using Local Mean Air-Age", Transactions of the KSMEB, Vol. 31, No. 5, pp. 457-466, 2007.
5 Lee Si-Hwan, Lee Ki-Sup, Park Sung-Kwan, Lee Jung-Hun, Lee Eun-Taek, Yee Jurng-Jae, "CFD Simulation on Indoor Air Quality in a Apartment Housing equipped for Total Heat Exchanger with Air Cleaing Function", Proceedings of the SAREK 2004 Summer Annual Conference, pp. 693-700, 2004.
6 Sandberg M, "Ventilation Efficiency as a Guide to Design", ASHRAE Transactions, Vol. 89, Pt.2B, pp. 455-479, 1983.
7 Young-Don Choi, "Current state of domestic research on warm current model relating to numerical hydromechanics", Journal of the Korean society of mechanical engineers, Vol. 29, No. 4, pp. 360-375, 1989.
8 Shin Jae-Kwan, "Laminar Flow of an Incompressible Fluid Between Porous Walls", J.Korean Society of Mechanical Engineers, Vol. 8, No. 1, pp. 11-13, 1968.
9 Ansys CFX, Release 12.0, www.ansys.com, 2009.
10 Jiho Choi, Choongsik Kim, Yumi So, "Oxygen Sensor Placement and Uniformity Index Study Using Unsteady State CFD Analysis", KSAE 30th Anniversary Conference 2008 Proceedings, Vol. 1, pp. 154-159, 2008.
11 Shiu H.R, Huang H.Y, Chen S. L., and Ke M. T, "Numerical Simulation for Air Flow in Mini-Environment and SMIF Enclosure", IEEE Transactions on Semiconductor Manufacturing, IEEE, Vol. 16, No. 1, pp. 60-67, 2003.
12 CD-Adacpco, STAR-CCM+ 2.10.017, 2007.