The effects of tumble and swirl flows on flame propagation in a four-valve S.I. engine

Lee, Kihyung; Bae, Choongsik; Kang, Kernyong

doi:10.1016/j.applthermaleng.2006.11.011

Cited by 109 publications

(47 citation statements)

References 16 publications

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“…shown that an increase in turbulence due to intake-generated swirl and tumble in SI engines increases flame speed [85,86,88,89,92]. These studies also demonstrated a strong relationship between engine speed and flame speed, with Lancaster et al [88] finding that flame speed nearly doubled when increasing the speed of a CFR engine from 1000rpm to 2000rpm.…”

Section: Fired Enginementioning

confidence: 48%

The Influence of Thermal Barrier Coating Surface Roughness on Spark-Ignition Engine Performance and Emissions

Memme

Wallace

2012

ASME 2012 Internal Combustion Engine Division Fall Technical Conference

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The effects on heat transfer of piston crown surface finish and use of a metal based thermal barrier coating (TBC) on the piston crown were studied in an SI engine. Measured engine parameters such as power, fuel consumption, emissions and cylinder pressure were used to identify the effects of the coating and its surface finish. Two piston coatings were tested: a baseline copper coating and a metal TBC. Reducing surface roughness of both coatings increased in-cylinder temperature and pressure as a result of reduced heat transfer through the piston crown. These increases resulted in small improvements in both power and fuel consumption, while also having measurable effect on emissions. Oxides of nitrogen emissions were increased while total hydrocarbon emissions were decreased. Improvements attributed to the TBC were found to be small, but statistically significant. At an equivalent surface finish, the TBC performed better than the baseline copper finish.iii

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Section: Fired Enginementioning

confidence: 48%

The Influence of Thermal Barrier Coating Surface Roughness on Spark-Ignition Engine Performance and Emissions

Memme

Wallace

2012

ASME 2012 Internal Combustion Engine Division Fall Technical Conference

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“…Lower bore-to-stroke ratios favor high tumble generation in modern SI LDVs, which ensures more complete in-cylinder mixing (Mattarelli et al, 2013). Therefore, the reductions in bore-to-stroke ratios suggest an attempt by SI engine designers to reduce emissions and increase efficiencies (Lee, Bae, & Kang, 2007).…”

Section: Engine Geometrymentioning

confidence: 99%

Emissions, performance, and design of UK passenger vehicles

Martin

Bishop

Boies

2016

International Journal of Sustainable Transportation

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Consumer, legal, and technological factors influence the design, performance, and emissions of light-duty vehicles (LDVs). This work examines how design choices made by manufacturers for the UK market result in emissions and performance of vehicles throughout the past decade (2001)(2002)(2003)(2004)(2005)(2006)(2007)(2008)(2009)(2010)(2011). LDV fuel consumption, CO 2 emissions, and performance are compared across different combinations of air and fuel delivery system using vehicle performance metrics of power density and time to accelerate from rest to 100 km/h (62 mph, t z-62 ). Increased adoption of direct injection and turbocharging technologies helped reduce spark ignition (SI, gasoline vehicles) and compression ignition (CI, diesel vehicles) fuel consumption by 22% and 19%, respectively, over the decade. These improvements were largely achieved by increasing compression ratios in SI vehicles (3.6%), turbocharging CI vehicles, and engine downsizing by 5.7-6.5% across all technologies. Simultaneously, vehicle performance improved, through increased engine power density resulting in greater acceleration. Across the decade, t z-62 fell 9.4% and engine power density increased 17% for SI vehicles. For CI vehicles, t z-62 fell 18% while engine power density rose 28%. Greater fuel consumption reductions could have been achieved if vehicle acceleration was maintained at 2001 levels, applying drive train improvements to improved fuel economy and reduced CO 2 emissions. Fuel consumption and CO 2 emissions declined at faster rates once the European emissions standards were introduced with SI

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“…Some results related to the isolated or synergic effect of squish and swirl on flame propagation in various combustion chamber layouts are already analyzed and published [1,2] but results concerning the isolated or combined effect of the third type of organized flow i.e. tumble are relatively less presented and sometimes ambiguous [3,4]. For instance some authors [5] intake valve configurations and found that when both inlet valves are opened no defined tumble flow structure was created rendering quick vortices dissipation before BDC.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Turbulence Model Variation on Flame Propagation of CNG as a Fuel in 4 Valve Engines

Jovanović¹,

Masonicic²

2017

Sixth International Conference on Advances in Mechanical and Robotics Engineering - AMRE 2017

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The effects of tumble and swirl flows on flame propagation in a four-valve S.I. engine

Cited by 109 publications

References 16 publications

The Influence of Thermal Barrier Coating Surface Roughness on Spark-Ignition Engine Performance and Emissions

The Influence of Thermal Barrier Coating Surface Roughness on Spark-Ignition Engine Performance and Emissions

Emissions, performance, and design of UK passenger vehicles

The Effect of Turbulence Model Variation on Flame Propagation of CNG as a Fuel in 4 Valve Engines

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