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Modelling and Experimental Study of Internal EGR System for NOx Control on an Off-Road Diesel Engine
Technical Paper
2014-01-2645
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
This study deals with the development of an internal EGR (Exhaust Gas Recirculation) system for NOx reduction on a six cylinder, turbocharged intercooled, off-road diesel engine based on a modified cam with secondary lift. One dimensional thermodynamic simulation model was developed using a commercially available code. MCC heat release model was refined in the present work by considering wall impingement of the fuel as given by Lakshminarayanan et al. The NOx prediction accuracy was improved to a level of 90% by a generic polynomial fit between air excess ratio and prediction constants. Simulation results of base model were correlating to more than 95% with experimental results for ISO 8178 C1 test cycle.
Parametric study of intake and exhaust valve events was conducted with 2IVO (Secondary Intake Valve Opening) and 2EVO (Secondary Exhaust Valve Opening) methods. Combinations of different opening angles and lifts were chosen in both 2IVO and 2EVO methods for the study. Residual gas content has been estimated for each combination along with performance parameters and NOx emission. Simulation results showed 2IVO with 12 - 13% of main lift closing at 60°CA prior to main lift was found to be meeting the target internal EGR rates. Experimental set up was developed with instrumentations for performance, emission and internal EGR residual measurement along with temperatures and pressures. Experimental results showed a NOx emission reduction upto 27% with secondary lift of 12% to the main lift which is producing 10% iEGR rate. Experimental results of modified cam correlated to simulation results to a higher degree.
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Citation
Balaji, J., M. V., G., Rao, L., Bandaru, B. et al., "Modelling and Experimental Study of Internal EGR System for NOx Control on an Off-Road Diesel Engine," SAE Technical Paper 2014-01-2645, 2014, https://doi.org/10.4271/2014-01-2645.Also In
References
- G.S.R. (General Statutory Rules) 276 (E) dated 10th April 2007 Emission limits for Construction Equipment Vehicles (CEV)
- Benajes , J. , Reyes , E. , and Luján , J. Intake Valve Pre-lift Effect on the Performance of a Turbocharged Diesel Engine SAE Technical Paper 960950 1996 10.4271/960950
- Pourkhesalian , A. , Shamekhi , A. , and Salimi , F. NOx Control Using Variable Exhaust Valve Timing and Duration SAE Technical Paper 2010-01-1204 2010 10.4271/2010-01-1204
- Kawasaki , K. , Hirota , K. , Nagata , S. , Yamane , K. et al. Improvement of Natural-gas HCCI Combustion by Internal EGR by Means of Exhaust Valve Re-opening SAE Int. J. Engines 2 2 733 739 2009
- Aleiferis , P. , Charalambides , A. , Hardalupas , Y. , Taylor , A. et al. Modelling and Experiments of HCCI Engine Combustion with Charge Stratification and Internal EGR SAE Technical Paper 2005-01-3725 2005 10.4271/2005-01-3725
- Edwards , S. , Frankle , G. , Wirbeleit , F. , and Raab , A. The Potential of a Combined Miller Cycle and Internal EGR Engine for Future Heavy Duty Truck Applications SAE Technical Paper 980180 1998 10.4271/980180
- Meistrick , Z. , Usko , J. , Shoyama , K. , Kijima , K. et al. Integrated Internal EGR and Compression Braking System for Hino's E13C Engine SAE Technical Paper 2004-01-1313 2004 10.4271/2004-01-1313
- Schwoerer , J. , Dodi , S. , Fox , M. , Huang , S. et al. Internal EGR Systems for NOx Emission Reduction in Heavy-Duty Diesel Engines SAE Technical Paper 2004-01-1315 2004 10.4271/2004-01-1315
- AVL BOOST User Guide
- Lakshminarayanan P. A. , Aghav Y. V. , Dani A. D. and Metha P. S. Accurate prediction of the rate of heat release in a modern direct injection diesel engine IMeche:2002 216 2002
- Pattas K. , Haefner G. Stickoxidbildung bei der ottomotorischen Verbrennung Motortech Zeits 1973 34 12 397 404 1973
- Chmela , F. and Orthaber , G. Rate of Heat Release Prediction for Direct Injection Diesel Engines Based on Purely Mixing Controlled Combustion SAE Technical Paper 1999-01-0186 1999 10.4271/1999-01-0186
- Jaipuria A and Lakshminarayanan P A Prediction of the rate of heat release of mixing-controlled combustion in a common-rail engine with pilot and post injections JAUTO1615, IMechE 224 2010
- ISO 8178-4:1996 Reciprocating internal combustion engines -- Exhaust emission measurement -- Part 4: Steady-state test cycles for different engine applications
- AVL Gas Exchange and Combustion Analysis V4.1, Product Guide