Diesel Engine Technologies Enabling Powertrain Optimization to Meet U.S. Greenhouse Gas Emissions

Stanton, Donald W.; Charlton, S J; Vajapeyazula, Phani

doi:10.4271/2013-24-0094

Cited by 33 publications

(24 citation statements)

References 3 publications

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“…Open cycle efficiency (OCE) captures the efficiency of the gas exchange process, closed cycle efficiency (CCE) represents the effectiveness of combustion and mechanical efficiency (ME) captures frictional and accessory losses (Stanton, 2013). The three efficiencies contribute to the brake thermal efficiency (BTE) as shown in equation (1) (for more information see Stanton et al (2013)). …”

Section: Efficiency Analysismentioning

confidence: 99%

Reducing Diesel Engine Drive Cycle Fuel Consumption through Use of Cylinder Deactivation to Maintain Aftertreatment Component Temperature during Idle and Low Load Operating Conditions

et al. 2017

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Modern on-road diesel engine systems incorporate flexible fuel injection, variable geometry turbocharging, high pressure exhaust gas recirculation, oxidation catalysts, particulate filters, and selective catalytic reduction systems in order to comply with strict tailpipe-out NOx and soot limits. Fuel consuming strategies, including late injections and turbine-based engine exhaust throttling, are typically used to increase turbine-outlet temperature and flow rate in order to reach the aftertreatment component temperatures required for efficient reduction of NOx and soot. The same strategies are used at low load operating conditions to maintain aftertreatment temperatures. This paper demonstrates that cylinder deactivation (CDA) can be used to maintain aftertreatment temperatures in a more fuel-efficient manner through reductions in airflow and pumping work. The incorporation of CDA to maintain desired aftertreatment temperatures during idle conditions is experimentally demonstrated to result in fuel savings of 3.0% over the HD-FTP drive cycle. Implementation of CDA at non-idle portions of the HD-FTP where BMEP is below 3 bar is demonstrated to reduce fuel consumption further by an additional 0.4%, thereby resulting in 3.4% fuel savings over the drive cycle.

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Section: Efficiency Analysismentioning

confidence: 99%

Reducing Diesel Engine Drive Cycle Fuel Consumption through Use of Cylinder Deactivation to Maintain Aftertreatment Component Temperature during Idle and Low Load Operating Conditions

et al. 2017

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“…Volute throat radius (mm) 129 Volute throat area (mm 2 Three-dimensional steady computational fluid dynamics (CFD) simulations were carried out using the commercial code FINE TM /Open. FINE TM /Open is a Reynolds-average Navier-Stokes equation solver, which is based on the finite volume method, uses five stage explicit Runge-Kutta scheme and full hexahedra unstructured meshing strategy.…”

Section: Geometry Parameter Valuementioning

confidence: 99%

“…More than half of the fuel energy in the internal combustion engines is discharged in the form of heat to the environment. Waste heat recovery is considered as one of the most promising technologies to improve the engine thermal efficiency [2].…”

Section: Introductionmentioning

confidence: 99%

Similarity Theory Based Radial Turbine Performance and Loss Mechanism Comparison between R245fa and Air for Heavy-Duty Diesel Engine Organic Rankine Cycles

Zhang

Zhuge

Zhang

et al. 2017

Entropy

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Organic Rankine Cycles using radial turbines as expanders are considered as one of the most efficient technologies to convert heavy-duty diesel engine waste heat into useful work. Turbine similarity design based on the existing air turbine profiles is time saving. Due to totally different thermodynamic properties between organic fluids and air, its influence on turbine performance and loss mechanisms need to be analyzed. This paper numerically simulated a radial turbine under similar conditions between R245fa and air, and compared the differences of the turbine performance and loss mechanisms. Larger specific heat ratio of air leads to air turbine operating at higher pressure ratios. As R245fa gas constant is only about one-fifth of air gas constant, reduced rotating speeds of R245fa turbine are only 0.4-fold of those of air turbine, and reduced mass flow rates are about twice of those of air turbine. When using R245fa as working fluid, the nozzle shock wave losses decrease but rotor suction surface separation vortex losses increase, and eventually leads that isentropic efficiencies of R245fa turbine in the commonly used velocity ratio range from 0.5 to 0.9 are 3%-4% lower than those of air turbine.

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“…Today's SCR systems are capable of achieving a cycle averaged NOx reduction efficiency up to 96 % [1] which enables full compliance with the most stringent current emissions legislation. These systems use a urea water solution, commercially known as AdBlue, to provide the ammonia required for the SCR reaction into the exhaust stream.…”

Section: Introductionmentioning

confidence: 99%

“…The continued push from regulators for HD diesel engines to reduce fuel consumption and CO 2 emissions and realising engines with brake thermal efficiencies nearing 50 % will require engine calibrations and a combustion strategy which generate high engine out NOx at levels of 8 to 12 g/kWh [3]. These engines will require SCR systems capable of over 98 % NOx reduction efficiency and due to the increased NOx levels will require significantly increased AdBlue injection rates into the exhaust flow in order to provide enough ammonia for the SCR reactions, but ultimately could deliver a fuel consumption improvement of nearly 3 % compared to a 2010 baseline engine [1].…”

Section: Introductionmentioning

confidence: 99%

Optical Investigation on the Ability of a Cordierite Substrate Mixing Device to Combat Deposits in SCR Dosing Systems

Lockyer¹,

Reid²,

Hargrave³

et al. 2015

SAE Technical Paper Series

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Diesel Engine Technologies Enabling Powertrain Optimization to Meet U.S. Greenhouse Gas Emissions

Cited by 33 publications

References 3 publications

Reducing Diesel Engine Drive Cycle Fuel Consumption through Use of Cylinder Deactivation to Maintain Aftertreatment Component Temperature during Idle and Low Load Operating Conditions

Reducing Diesel Engine Drive Cycle Fuel Consumption through Use of Cylinder Deactivation to Maintain Aftertreatment Component Temperature during Idle and Low Load Operating Conditions

Similarity Theory Based Radial Turbine Performance and Loss Mechanism Comparison between R245fa and Air for Heavy-Duty Diesel Engine Organic Rankine Cycles

Optical Investigation on the Ability of a Cordierite Substrate Mixing Device to Combat Deposits in SCR Dosing Systems

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