International Journal of Vehicle Structures and Systems

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Effect of Exhaust Back Pressure on Performance and Emission Characteristics of Diesel Engine Equipped with Diesel Oxidation Catalyst and Exhaust Gas Recirculation


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1 Dept. of Mech. Engg., Symbiosis Institute of Tech., Pune, India
 

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Currently the emission norms are becoming more stringent, continuous modifications are taking place in existing I.C engines as well as in after treatment devices (ATDs). Exhaust Gas Recirculation (EGR) and Diesel Oxidation Catalyst (DOC) are the mandatory ATDs controlled electronically to optimize engine brake power, fuel consumption and emissions. The conversion efficiency of ATDs mainly depends on exhaust pressure, temperature, flow rate and fluid characteristics of exhaust gas. However, the installation of ATDs increases the exhaust back pressure in the exhaust system. The back pressure of engine also depends on the parameters like engine operating conditions, design of exhaust valves, valve lift time, exhaust gas dynamics and exhaust manifold design etc. In this paper the attempt is made to study the effect of back pressure on performance and emission of diesel engines equipped with EGR and DOC. Here we have not modified the intake and exhaust valves instead, we varied the back pressure of exhaust system using back pressure control valve (BPCV). BPCV is operated manually at three positions, they are 100%, 87.5% and 75% BPCV lifts. The readings are taken in different combinations of BPCV lifts and brake torque at 20, 40, 60, and 80 N-m. The results obtained shows variation of BPCV lift and brake torque effected on performance of engine, DOC and EGR operations as well as fuel consumption. The NOx is reduced by 15%; HC and CO are reduced significantly. However, there is an increase in brake specific fuel consumption (BSFC) and exhaust smoke.

Keywords

Back Pressure, Valve Lift, Brake Torque, Internal EGR, Back Pressure Control Valve, NOX.
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  • A.D. Bugarski, G.H. Schnakenberg and L.D. Patts. 2006. Implementation of diesel particulate filter technology in underground metal and non-metal mines, Proc. 11th US/North American Mine Ventilation Symp., 127-133.

  • H. Jääskeläinen. 2018. Engine Exhaust Back Pressure, https://www.dieselnet.com.

  • A.M. Stamatelos. 1997. A review of the effect of particulate traps on the efficiency of vehicle diesel engines, Energy Convers. Manag, 38(1), 83-99. https://doi.org/10.1016/0196-8904(96)00011-8

  • S. Cong, C.P. Garner and G.P.M.T. Cowan. 2011. The effects of exhaust back pressure on conventional and low-temperature diesel combustion, IMechE J. Automob. Engg, 225(2), 222-235. https://doi.org/10.1177/09544070JAUTO1577.

  • A.K. Hasannuddin, W.J. Yahya, S. Sarah, A.M. Ithnin, S. Syahrullail, D.A. Sugeng, I.F.A. Razak, A.Y. Abd Fatah, W.S. Aqma, A.H.A. Rahman and N.A. Ramlan. 2018. Performance, emissions and carbon deposit characteristics of diesel engine operating on emulsion fuel, Energy, 142, 496-506. https://doi.org/10.1016/j.energy.2017.10.044.

  • H. Horiuchi, Y. Ihara, T. Shimizu, S. Niino and K. Shoyama. 2004. The Hino E13C: A heavy-duty diesel engine developed for extremely low emissions and superior fuel economy, SAE Tech. Paper 2004-01-1312. https://doi.org/10.4271/2004-01-1312

  • J.M. Luján, H. Climent, L.M. García-Cuevas and A. Moratal. 2018. Pollutant emissions and diesel oxidation catalyst performance at low ambient temperatures in transient load conditions, Applied Thermal Engg., 129(2), 1527-1537. https://doi.org/10.1016/j.applthermaleng.2017.10.138

  • A. Mayer. 2008. Particle Filter Retrofit for All Diesel Engines, Expert Verlag.

  • F. Millo, F. Mallamo, L. Arnone, M. Bonanni, and D. Franceschini. 2007. Analysis of different internal egr solutions for small diesel engines, SAE Tech. Paper 2007-01-0128. https://doi.org/10.4271/2007-01-0128.

  • R.S.G. Baert, D.E. Beckman and A. Veen.1999. Efficient EGR technology for future HD diesel engine emission targets, SAE Tech. Paper 1999-01-0837. https://doi.org/10.4271/1999-01-0837.

  • K. Yoshida, H. Shoji and H. Tanaka. 2000. Engine Performance of lean methanol-air mixture ignited by diesel fuel injection applied with internal EGR, SAE Tech. Paper 2000-01-2012, https://doi.org/10.4271/2000-01-2012.

  • D.W. Rowley. 1977. Exhaust system considerations for 1982 heavy duty trucks, SAE Tech. Paper 770893. https://doi.org/10.4271/770893.

  • J.E. Kleinhenz and S.D. Schmeichel. 1981. Fuel Efficient Exhaust System, SAE Trans., 90(3), 2697-2704 [14] T.V. Johnson. 2003. Diesel emission control in review for the last 12 months, SAE Tech. Paper, 2000-01-2817. https://doi.org/10.4271/2000-01-2817.

  • M. Sutton, N. Britton, B. Otterholm, P. Tengström, C. Frennfelt, A. Walker and I. Murray. 2004. Investigations into lubricant blocking of diesel particulate filters, SAE Tech. Paper 2004-01-3013. https://doi.org/10.4271/2004-01-3013.

  • A.E. Awara, C.N. Opris and J.H. Johnson. 1997. A theoretical and experimental study of the regeneration process in a silicon carbide particulate trap using a copper fuel additive, SAE Tech. Paper 970188, 24. https://doi.org/10.4271/970188.

  • S. Bhure and M. Pattar. 2015. Performance and emission characteristics of a single cylinder four stroke diesel engine with water-diesel emulsions, Int. J. Sci. Res. & Dev., 3(10),1055-1058.


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PDF Views: 135




  • Effect of Exhaust Back Pressure on Performance and Emission Characteristics of Diesel Engine Equipped with Diesel Oxidation Catalyst and Exhaust Gas Recirculation

Abstract Views: 231  |  PDF Views: 135

Authors

Sangamesh Bhure
Dept. of Mech. Engg., Symbiosis Institute of Tech., Pune, India

Abstract


Currently the emission norms are becoming more stringent, continuous modifications are taking place in existing I.C engines as well as in after treatment devices (ATDs). Exhaust Gas Recirculation (EGR) and Diesel Oxidation Catalyst (DOC) are the mandatory ATDs controlled electronically to optimize engine brake power, fuel consumption and emissions. The conversion efficiency of ATDs mainly depends on exhaust pressure, temperature, flow rate and fluid characteristics of exhaust gas. However, the installation of ATDs increases the exhaust back pressure in the exhaust system. The back pressure of engine also depends on the parameters like engine operating conditions, design of exhaust valves, valve lift time, exhaust gas dynamics and exhaust manifold design etc. In this paper the attempt is made to study the effect of back pressure on performance and emission of diesel engines equipped with EGR and DOC. Here we have not modified the intake and exhaust valves instead, we varied the back pressure of exhaust system using back pressure control valve (BPCV). BPCV is operated manually at three positions, they are 100%, 87.5% and 75% BPCV lifts. The readings are taken in different combinations of BPCV lifts and brake torque at 20, 40, 60, and 80 N-m. The results obtained shows variation of BPCV lift and brake torque effected on performance of engine, DOC and EGR operations as well as fuel consumption. The NOx is reduced by 15%; HC and CO are reduced significantly. However, there is an increase in brake specific fuel consumption (BSFC) and exhaust smoke.

Keywords


Back Pressure, Valve Lift, Brake Torque, Internal EGR, Back Pressure Control Valve, NOX.

References





DOI: https://doi.org/10.4273/ijvss.10.3.09