Effect of Piston Cavity Geometry on Combustion, Emission and Performance of a Medium Duty DI Diesel Engine

Dakhore, Rushikesh; Gandhi, Naresh G.; Gokhale, Nitin; Aghav, Yogesh V.; Kumar, M N; Hulwan, D. B.

doi:10.4271/2015-26-0198

Cited by 7 publications

(6 citation statements)

References 12 publications

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“…Zhang Yanhui [4] studied the impact of key combustor features on economy and emissions, and designed an optimization scheme for combustor. R. Dakhore [5] studied the influence of the crater shape of the combustion chamber on the performance, combustion and emission of the medium-sized direct-injected diesel engine. The author compares the simulation results of four kinds of combustor shapes, and finds that increasing swirl chamber pit shape can improve oil and gas mixing and combustion, and thus reduce NOX and soot emission.…”

Section: Introductionmentioning

confidence: 99%

Combined effects of combustion chamber geometry and injection strategy on combustion and emissions of a diesel engine

2021

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For a certain type of direct injection diesel engine, a three-dimensional model of a single-cylinder complete combustion chamber and in-take/exhaust port was established. Three-dimensional Computational Fluid Dynamics (CFD) analysis software CONVERGE was used for simulation. The effects of fuel injection strategy and combustion chamber geometry on combustion emissions of diesel engine were studied while the combustion chamber volume, engine compression ratio, total fuel injection quantity and total injection duration were kept unchanged. The results show that the strategy of multiple injection and reasonable shape of combustion chamber can effectively increase the turbulent kinetic energy in cylinder, improve the uniformity of oil-gas mixing, reduce the emission of pollutants, and increase the quality of after injection can further reduce the emissions of NOx and soot.

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Section: Introductionmentioning

confidence: 99%

Combined effects of combustion chamber geometry and injection strategy on combustion and emissions of a diesel engine

2021

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“…Combustion chamber geometry is known to have a major influence on in-cylinder NO x and soot formation in diesels; spray targetingand the interaction of the spray and piston at the lip of the piston bowl-will have a significant influence on local fuel/air ratios in both the squish region and the bowl [3][4][5][6] and will affect in-cylinder heat transfer [7,8]. The geometric detail of the combustion chamber and bowl will also have a similar influence [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

The effect of a stepped lip piston design on performance and emissions from a high-speed diesel engine

et al. 2018

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“…Fuel/air mixing and air entrainment is also affected by the interaction of the spray with the in-cylinder charge and combustion chamber geometry. In particular, the targeting of the spray with respect to the lip of the piston bowl will influence the local equivalence ratios in the bowl and the squish region [10,11]; combustion chamber heat transfer will also be affected [12,13]. Piston bowl shape will also have an effect on emissions and fuel consumption for similar reasons [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Comparing the Effect of Fuel/Air Interactions in a Modern High-Speed Light-Duty Diesel Engine

Leach

Ismail

Davy

et al. 2017

SAE Technical Paper Series

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Modern diesel cars, fitted with state-of-the-art aftertreatment systems, have the capability to emit extremely low levels of pollutant species at the tailpipe. However, diesel aftertreatment systems can represent a significant cost, packaging and maintenance requirement. Reducing engine-out emissions in order to reduce the scale of the aftertreatment system is therefore a high priority research topic. Engine-out emissions from diesel engines are, to a significant degree, dependent on the detail of fuel/air interactions that occur in-cylinder, both during the injection and combustion events and also due to the induced air motion in and around the bowl prior to injection.In this paper the effect of two different piston bowl shapes are investigated. Experiments are performed in a single-cylinder engine fitted with a production cylinder head and fuel injector in order to quantify the effect of the bowl shape and spray targeting-varied by varying the injector nozzle tip protrusion-on emissions and fuel consumption. Multi-dimensional CFD modelling is used to detail the effect of these geometry changes on the in-cylinder flow and fuel/air mixing processes thereby guiding the interpretation and understanding of the experimental results. The results suggest that improvements in engine-out emissions, as well as fuel consumption, may be obtained from current diesel engines by the careful matching of combustion system geometry with fuel injection hardware and strategy, and that an integrated approach with experimental and numerical studies working in parallel is essential to maximise these benefits.

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Effect of Piston Cavity Geometry on Combustion, Emission and Performance of a Medium Duty DI Diesel Engine

Cited by 7 publications

References 12 publications

Combined effects of combustion chamber geometry and injection strategy on combustion and emissions of a diesel engine

Combined effects of combustion chamber geometry and injection strategy on combustion and emissions of a diesel engine

The effect of a stepped lip piston design on performance and emissions from a high-speed diesel engine

Comparing the Effect of Fuel/Air Interactions in a Modern High-Speed Light-Duty Diesel Engine

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