Flame Temperature Correlation for the Effects of Exhaust Gas Recirculation on Diesel Particulate and NO<sub>x</sub> Emissions

Plee, S. L.; Ahmad, Tanvir; Myers, J. P.

doi:10.4271/811195

Cited by 79 publications

(27 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is well known that one of the consequences of EGR technique application is the reduction of oxygen concentration at the engine intake (X O 2 i ), representing the dilution effect [1,2,18]. Therefore, the maximum EGR rate, which can be applied without unacceptable penalties in soot emission and in engine performance, depends on AFR corresponding to the requested engine load, being higher at low brake mean effective pressure (bmep) values.…”

Section: High and Low Pressure Exhaust Gas Recirculation Circuitsmentioning

confidence: 99%

“…Among the different available technologies to limit NO X emissions in internal combustion engines (ICEs), exhaust gas recirculation (EGR) has a long and consolidated history, with investigations started about fifty years ago, both on gasoline [1] and diesel engines [2]. Since then, a number of evolution steps were applied to EGR systems, through the fitting of electronic control and exhaust gas cooling, in order to enhance their management while achieving higher effectiveness.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effects of a Dual-Loop Exhaust Gas Recirculation System and Variable Nozzle Turbine Control on the Operating Parameters of an Automotive Diesel Engine

2017

View full text Add to dashboard Cite

Reduction of NO X emissions and fuel consumption are the main topics in engine development, forcing the adoption of complex techniques and components, whose interactions have to be clearly understood for proper and reliable operations and management of the whole system. The investigation presented in this paper aimed at the development of integrated control strategies of turbocharging, high pressure (HP) and low pressure (LP) exhaust gas recirculation (EGR) systems for better NO X emissions and fuel consumption, while analyzing their reciprocal influence and the resulting variations of engine quantities. The study was based on an extended experimental program in three part load engine operating conditions. In the paper a comparison of the behavior of the main engine sub-systems (intake and exhaust circuits, turbocharger turbine and compressor, HP and LP EGR loops) in a wide range of operating modes is presented and discussed, considering open and closed loop approaches for variable nozzle turbine (VNT) control, and showing how these affect engine performance and emissions. The potential of significant decrease in NO X emissions through the integration of HP and LP EGR was confirmed, while a proper VNT management allowed for improved fuel consumption level, if an open loop control scheme is followed. At higher engine speed and load, further actions have to be applied to compensate for observed soot emissions increase.

show abstract

Section: High and Low Pressure Exhaust Gas Recirculation Circuitsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of a Dual-Loop Exhaust Gas Recirculation System and Variable Nozzle Turbine Control on the Operating Parameters of an Automotive Diesel Engine

2017

View full text Add to dashboard Cite

show abstract

“…Work by Plee, Ahmad, and coworkers in the 1980s Plee et al, 1981a;Plee et al, 1981b;Plee et al, 1982) showed that for changes in intake air state, diesel NO x , soot, soluble organic fraction, and HC emissions could be correlated using the stoichiometric flame temperature calculated at start of combustion (SOC) or peak pressure conditions. Their model equation has the form sd 1 1,sd…”

Section: Introductionmentioning

confidence: 99%

DI Diesel Performance and Emissions Models

Mellor¹,

Easley²

2003

View full text Add to dashboard Cite

Public Reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Development of models for direct injection diesel performance and emissions of NO x and soot are the goals of this research. The simplest models investigated are flame temperature correlations. These correlations are semi-empirical tools that provide insight into the effects of dilution on NO x , particulate, and HC emissions and can be used by the design or calibration engineer to reduce the number of engine tests required. A characteristic time model for NO x emissions has been used to study the mixing processes in diesel engines and extended to study multiple injections, water/steam dilution, and the results of NO injection tests. This NO x model was also modified to calculate the NO formed in the cylinder as a function of time and was shown to correlate engine-out NO x emissions for four diesel engines. Development of a cycle simulation code is also underway. Primary emphasis has been placed on the study of the ignition and combustion submodels for this code. The NO x model mentioned above has been included in the code and a soot submodel proposed. Upon completion, the cycle simulation code will allow evaluation of new schemes for improving performance, power density, and pollutant emissions.

show abstract

“…Many investigators (Plee et al 1981;Bowen et al 1996;Li et al 1997) have reported reductions in NO x emissions from diesel engines by using N 2 -enriched air. However, all these engine tests were conducted using bottled N 2 , primarily to simulate EGR effects.…”

Section: Nitrogen Enrichmentmentioning

confidence: 99%

Membrane-based air composition control for light-duty diesel vehicles : a benefit and cost assessment.

Poola¹,

Stork²

1998

View full text Add to dashboard Cite

Flame Temperature Correlation for the Effects of Exhaust Gas Recirculation on Diesel Particulate and NO_x Emissions

Cited by 79 publications

References 34 publications

Effects of a Dual-Loop Exhaust Gas Recirculation System and Variable Nozzle Turbine Control on the Operating Parameters of an Automotive Diesel Engine

Effects of a Dual-Loop Exhaust Gas Recirculation System and Variable Nozzle Turbine Control on the Operating Parameters of an Automotive Diesel Engine

DI Diesel Performance and Emissions Models

Membrane-based air composition control for light-duty diesel vehicles : a benefit and cost assessment.

Contact Info

Product

Resources

About

Flame Temperature Correlation for the Effects of Exhaust Gas Recirculation on Diesel Particulate and NOx Emissions

Cited by 79 publications

References 34 publications

Effects of a Dual-Loop Exhaust Gas Recirculation System and Variable Nozzle Turbine Control on the Operating Parameters of an Automotive Diesel Engine

Effects of a Dual-Loop Exhaust Gas Recirculation System and Variable Nozzle Turbine Control on the Operating Parameters of an Automotive Diesel Engine

DI Diesel Performance and Emissions Models

Membrane-based air composition control for light-duty diesel vehicles : a benefit and cost assessment.

Contact Info

Product

Resources

About

Flame Temperature Correlation for the Effects of Exhaust Gas Recirculation on Diesel Particulate and NO_x Emissions