Effect of Small Holes and High Injection Pressures on Diesel Engine Combustion

Dodge, Lee G.; Simescu, Stefan; Neely, Gary D.; Maymar, Milan J.; Dickey, Daniel W.; Savonen, Craig

doi:10.4271/2002-01-0494

Cited by 57 publications

(18 citation statements)

References 3 publications

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“…With engine technology evolution, common rail injection systems allowing a thorough control of the combustion process have been considered to be a superior enabler to reduce engine exhaust particle emissions, and hence decrease the particle deposition rate in the DPF (Bertola et al 2001;Dodge et al 2002;Han and Bae 2012). Experimental results have indicated that particle formation in diesel engines was highly dependent on the mixing and combustion of injected fuel.…”

Section: Introductionmentioning

confidence: 97%

Effects of Injection Pressure on Diesel Engine Particle Physico-Chemical Properties

Zhou

Guan

et al. 2013

Aerosol Science and Technology

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The effects of injection pressure on diesel particle physical and chemical properties were investigated on a heavy-duty diesel engine. Three injection pressures (600 bar, 800 bar, and 1000 bar) were selected at two engine loads (0.3 MPa BMEP and 0.9 MPa BMEP). The exhaust particle size distribution was measured by a scanning mobility particle sizer (SMPS). Consistent with previous studies, increasing injection pressure effectively removes accumulation mode particles, which results in a significant decrease in particle total mass concentration. The elemental carbon emission factors were then tested through organic carbon/element carbon (OC/EC) analysis. The emitted EC is decreased by 64% and 50% with increasing injection pressure from 600 bar to 1000 bar at the low and high engine loads, respectively. Particle morphology and oxidation reactivity were investigated by means of transmission electron microscope (TEM) imaging and thermogravimetric analysis (TGA) technology, respectively. Smaller primary particles with shorter and flatter graphene layer segments are observed at higher injection pressure conditions, and the particle oxidation reactivity is increased with injection pressure.

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Section: Introductionmentioning

confidence: 97%

Effects of Injection Pressure on Diesel Engine Particle Physico-Chemical Properties

Zhou

Guan

et al. 2013

Aerosol Science and Technology

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“…Their observations showed that the penetration distance and mixing rate of the fuel/air to injection pressure, diameter of the injector hole and numerous secondary factors. Later, Dodge,et.al.,(3) utilizing modified and enhanced versions of Siebers' models and engine experiments, described a path to reduced smoke for diesel engines. The proposed solution recognized the air-fuel mixing improvement recognized when high injection pressure was utilized in combination with small injector nozzle-holes.…”

Section: ．Problem Definitionmentioning

confidence: 99%

Advancement in Diesel Combustion System Design to Improve the Smoke-BSFC Tradeoff

Roberts

Stovell

Rothbauer

et al. 2011

IJAE

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Modern diesel engines must simultaneously provide ultra-low emissions and world-class fuel economy. To meet these requirements, many new combustion strategies require that combustion occur in an oxygen-limited and/or very high EGR environment, both of which increase the tendency for particulate emissions and reduced burn-rate. The current study utilized an iterative combination of simulations and engine experiments to identify improved combustion system designs for future diesel engines. Additionally, success in reducing soot and improving burn rate in an oxygen-limited environment opens the door to new strategies for diesel combustion in the future.

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“…From the literature, it is found that rather expensive techniques are available to combat pollution problems in comfort vehicles and it is found essential to develop an economical technology for small passenger vehicles with minimum modifications [18][19][20][21]. Moreover, the engine manufactures are also facing serious challenges to keep their industries alive and making modifications in the products, so as to comply with periodic changes in the emission norms.…”

Section: Introductionmentioning

confidence: 99%

Development of variable timing fuel injection cam for effective abatement of diesel engine emissions

Rao

Kaleemuddin²

2011

Applied Energy

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Effect of Small Holes and High Injection Pressures on Diesel Engine Combustion

Cited by 57 publications

References 3 publications

Effects of Injection Pressure on Diesel Engine Particle Physico-Chemical Properties

Effects of Injection Pressure on Diesel Engine Particle Physico-Chemical Properties

Advancement in Diesel Combustion System Design to Improve the Smoke-BSFC Tradeoff

Development of variable timing fuel injection cam for effective abatement of diesel engine emissions

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