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Development of Diesel Particulate NOx Reduction DPNR System for Simultaneous Reduction of PM and NOx in Diesel Engines

ARAI Academy-E. Parthiban, Aatmesh Jain, Kamalkishore Chhaganlal Vora
  • Technical Paper
  • 2019-28-2554
To be published on 2019-11-21 by SAE International in United States
The Diesel Particulate NOx Reduction (DPNR) system is used for simultaneous reduction of PM and NOx in diesel engine. DPF is used to trap particulate matter in diesel engines. NOx absorber technology removes NOx in a lean (i.e. oxygen rich) exhaust environment for both diesel and gasoline lean-burn GDI engines. The NOx storage and reduction catalyst is uniformly coated on the wall surface and in the fine pores of a highly porous filter substrate. Combination of these two components in the DPNR results in a compact size of the system. The base diesel engine model validated with pressure crank angle diagram and performance parameters such as Indicated mean effective pressure. This base engine’s exhaust emission is given as an input to the DPNR system. The surface reaction is connected to the DPF through chemcon template. The surface reaction is NOx storage and reduction chemical kinetics like Lean NOx Trap. The modelling of DPNR and Base engine is done using GT-SUITE. This paper describes about the 1D simulation of DPNR system with base diesel engine model…
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Combustion Optimization and In-cylinder NOx and PM Reduction by using EGR and Split Injection Technique

ARAI Academy-Madhan Kumar, Aatmesh Jain, Kamalkishore Chhaganlal Vora
  • Technical Paper
  • 2019-28-2560
To be published on 2019-11-21 by SAE International in United States
Nowadays, the major most challenge in the diesel engine is the oxides of nitrogen (NOx) and particulate matter (PM) trade-off, with minimal reduction in Power and BSFC. Modern day engines also rely on expensive after-treatment devices, which may decrease the performance and increase the BSFC. In this paper, combustion optimization and in-cylinder emission control by introducing the Split injection technique along with EGR is carried out by 1-D (GT-POWER) simulation. Experiments were conducted on a 3.5 kW Single-cylinder naturally aspirated CRDI engine at the different load conditions. The Simulation model incorporates detailed pressure (Burn rate) analysis for different cases and various aspects of ignition delay, premixed and mixing controlled combustion rate, the injection rate affecting oxides of nitrogen and particulate matter. The predictive combustion model (DI-PULSE) has been developed for the calibration of an engine under multiple injections and the detailed injection rates with EGR rates. Split injection with higher fuel quantity injected in the 1st pulse, helped to significantly reduce PM emissions. This reduction is due to the restraint in the premixed phase of…
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Design and Development of Tunable Exhaust Muffler for Race Car

A R A I-Kamalkishore Chhaganlal Vora
ARAI Academy-Sankalp Talegaonkar
Published 2016-02-01 by SAE International in United States
The Exhaust Noise is one of the major noise pollutants. It is well-known that for higher noise reduction, the engine has to bear high back pressure. For a race car, back-pressure plays a major role in engine's performance characteristics.For a given condition of engine rpm & load, conventional muffler has a fixed value of back-pressure and noise attenuation. Better acceleration requires low back-pressure, but the exhaust noise should also be less than the required (Norm) value (110 dBA). This contradicting condition is achieved here by using a ‘Butterfly Valve’ in this novel exhaust muffler. The butterfly valve assumes 2 positions i.e. fully open & fully closed. When the valve is fully closed, the noise reduction will be higher, but the back-pressure will also shoot up. When open, noise reduction will be less and so the back-pressure. So, when better performance is required, the valve is opened and back-pressure is reduced.The muffler is designed for a 4 cylinder 600 cc engine. The sound transmission loss (STL), which is the measure of effectiveness of the muffler, is…
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Design and Simulation of 2.5 L Dual Fuel (Diesel-CNG) Engine for Performance Parameters

ARAI-Kamalkishore Chhaganlal Vora
AVTEC Ltd-Dilip gunjegaonkar
Published 2013-11-27 by SAE International in United States
The objective of this project is to design of gas mixer venturi as per IS4477 and simulation of dual fuel (Diesel-CNG) engine for performances parameters to examine the BSFC using GT-suite. In present work; a 59 kW diesel engine of 18.5 compression ratio has been converted to operate on dual fuel (Diesel-CNG) keeping same compression ratio with improved fuel economy.Natural gas is an excellent fuel. Its combustion and emission characteristics are superior to any other realistic competing fuel. There are advanced technologies like closed loop lambda control system and lean combustion are incorporated in the engine to achieve the performance targets.In the initial stage; experimental testing is conducted for base diesel engine on engine dynamo for performance parameters. Experimental testing data and design data's of base diesel engine are used as input in GT-Suite to predict the performance of the base diesel engine. Mapping in GT-Suite is calibrated & optimized as per experimental results for getting closest result. Then, Experimental results and simulation results for base diesel engine are compared for performance parameters to validate…
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