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Sumeet Shinde, Shishir Srivastava


Major challenged faced by most of the engine manufacturers with improving performance of heavy duty diesel vehicles is to meet the stringent exhaust emission norms, with least modification in design. Heavy duty diesel engines have been recently equipped with various electronically controlled components, such as turbocharger, fuel injection pump (FIP), exhaust gas recirculation (EGR), etc. Simplicity of design is to be maintained by optimizing the available emission control technique in order to achieve the emission norms in cost effective manner. However, the selection of combustion parameters for optimization is extremely tedious because an engine has so many parameters to be optimized and their interactions are complicated.


This paper deals with combustion parameters for optimizing 75hp engine in order to fulfil Bharat Stage (Trem) III A emission norms, which was done on 4 cylinder 3.68 litre turbocharged engine giving power output of 55.6 kW @ 2200 revolution per minute (RPM). The norms were achieved in a cost effective manner by adopting appropriate injection timing, cooled EGR, in-cylinder head swirl, high pressure pipe (HPP)  for fuel delivery and fuel injection pump. By the help of turbocharger mapping can change the pressure ratio, mass flow rate of air for achieving good combustion performance, emission and brake specific fuel consumption (bsfc). Injection timing was retarded in order to reduce the in-cylinder temperature and with the help of cold EGR flow the nitrogen oxide (NOx) value was found to be within the limits. With proper selection of combustion parameters, the required performance was achieved and emission norms of Bharat Stage (Trem) III A was satisfied. An improvement of 12% in fuel consumption and a reduction of 50% in smoke levels was observed over the base engine after optimizing all the parameters.


Emission; turbocharger; EGR; injection parameters; swirl

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Vora K, Ramdasi S, Walke N, Marathe A. et al. Development Strategy for High Specific Power Low Emission Diesel Engines. SAE Technical Paper 2009-26-0020, 2009.

Tyagi N, Gupta S, Bhardwaj P, Gayen H et al. Optimization of GENSET Engine for CPCB- II Norms using Cost Effective Techniques. SAE Technical Paper 2013-01-2838, 2013;

Li Y, Cai Z, Li Y, Li Y. Increasing a Diesel Engine Power Output by Combustion System Optimization. SAE Technical Paper 2013-01-2530, 2013.

Yamamoto M, Yoneya S, Matsuguchi T, Kumagai Y. Optimization of Heavy Duty Diesel Engine Parameters for Low Exhaust Emissions Using the Design of Experiments. SAE Technical Paper 2002-01-1148, 2002., Dated on 28th May 2017.

Heywood JB. I. C. Engine Fundamentals. Mc Graw Hill Book Co. NY, 1988.

Kharazmi S, Hajilouy-Benisi A, Mozafari A. Experimental Investigation of Waste Gate Effects on Performance and NOx Emissions in a Turbocharged Aftercooled CNG SI Engine and its Turbocharger. SAE Technical Paper 2015-01-1957, 2015.

Niemi S, Laurén M, Murtonen T. Effect of Waste-Gate Turbocharging on the Exhaust Particulate Matter of an Off-Road Diesel Engine. SAE Technical Paper 2002-01-2159, 2002.

Ghazikhani M, Davarpanah M, Mousavi Shaegh SA. An experimental study on the effects of different opening ranges of waste-gate on the exhaust soot emission of a turbo-charged DI diesel engine. Energy Conversion and Management. Oct 2008; 49(10): 2563–2569p.

Claudio F, Cristian C, Giulio C, Marco BG, Stefania F, Federico B, Alessandro V, Stefano S. Numerical Evaluation of the Applicability of Steady Test Bench Swirl Ratios to Diesel Engine Dynamic Conditions. Energy Procedia. Dec 2015; 81: 732–741p.

Abdul Gafoor CP, Gupta R. Numerical investigation of piston bowl geometry and swirl ratio on emission from diesel engines. Energy Conversion and Management. Sep 2015; 101(1): 541–551p.

Wei S, Wang F, Leng X, Liu X, Ji K. Numerical analysis on the effect of swirl ratios on swirl chamber combustion system of DI diesel engines. Energy Conversion and Management. Nov 2013; 75: 184–190p.

Hussain J, Palaniradja K, Alagumurthi N, Manimaran R. Effect of Exhaust Gas Recirculation (EGR) on Performance and Emission characteristics of a Three Cylinder Direct Injection Compression Ignition Engine. Alexandria Engineering Journal. Dec 2012; 51(4): 241–247p.

Saravanan S. Effect of EGR at advanced injection timing on combustion characteristics of diesel engine. Alexandria Engineering Journal. Sep 2015; 54(3): 339–342p.

Ladommatos N, Balian R, Horrocks R, Cooper L. The Effect of Exhaust Gas Recirculation on Combustion and NOx Emissions in a High-Speed Direct-injection Diesel Engine. SAE Technical Paper 960840, 1996.

Aula HA, Mauch JL. Engine EGR Cooler. Patent Paper 4,267,812, (May 19, 1981).

Braun CW, Joseph M. Exhaust Gas Recirculation Valve. Patent Paper 4,805,582, (Feb. 21, 1989).

Dickey D, Ryan T, Matheaus A. Nox Control in Heavy-Duty Diesel Engines- What is the Limit? SAE Technical Paper 980174, 1998.

Raeiea N, Emamib S, Karimi Sadaghiyania O. Effect of injection timing, before and after TDC on the propulsion and power in a diesel engine. Science Direct, Propulsion and Power Research; 2014; 3(2): 59–67p.

Quazi M, Singh S, Jadhao M. Effect of Piston Bowl Shape, Swirl Ratio and Spray Angle on Combustion and Emission in Off Road Diesel Engine. SAE Technical Paper 2015-26-0142, 2015.



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