Exhaust gas recirculation for advanced diesel combustion cycles

Asad, Usman; Zheng, Ming

doi:10.1016/j.apenergy.2014.02.073

Cited by 100 publications

(48 citation statements)

References 39 publications

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“…In this investigation, intake and exhaust oxygen concentrations and CDI values were estimated according to the measured levels of air and EGR mass flow rates and to the calculation of in-cylinder relative AFR following the relationship presented in [25,26]. …”

Section: High and Low Pressure Exhaust Gas Recirculation Circuitsmentioning

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

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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.

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Section: High and Low Pressure Exhaust Gas Recirculation Circuitsmentioning

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

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“…The use of EGR is limited by increased PM emissions and reduced engine thermal efficiency, which causes a NO X /PM trade-off [9,[14][15][16][22][23][24]. He et al [8] explain that the use of high EGR rates is possible with the delay of diesel injection, reducing engine efficiency losses, but with increasing soot emissions.…”

Section: Introductionmentioning

confidence: 99%

“…The application of this technique to spark ignition and compression ignition engines has been studied with regard to its effects on engine performance, inlet air temperature control, combustion control and dual-fuel operation [4][5][6][7][8][9][10][11][12]. The possibility of reducing NO x emissions with the use of EGR rate results from thermal, chemical and dilution effects [8,9,[13][14][15][16]. In the thermal effect, the high specific heat of exhaust carbon dioxide (CO 2 ) and water (H 2 O), compared to oxygen (O 2 ) and nitrogen (N 2 ) in the intake air, reduces combustion temperature.…”

Section: Introductionmentioning

confidence: 99%

Effects of EGR rate on performance and emissions of a diesel power generator fueled by B7

Serio

Oliveira

Sodré

2017

J Braz. Soc. Mech. Sci. Eng.

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“…The proportion of premixed combustion is determined by the amount of mixed gas prepared during the ignition delay period [11]. In order to reflect the effect of intake dilution on the ignition delay in high EGR rate, this paper chooses (7) to calculate the period of ignition delay [12].…”

Section: Combustion Processmentioning

confidence: 99%

“…According to the mass and energy conservation equation, the temperature in the cylinder can be expressed by (12).…”

Section: E Exhaust Processmentioning

confidence: 99%

Control -Oriented Modeling and Experimental Study on Low Temperature Combustion for Diesel Engine

Fei

Zhang²,

Dong

et al. 2017

Proceedings of the 2017 2nd International Conference on Control, Automation and Artificial Intelligence (CAAI 2017)

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Abstract-Diesel low-temperature combustion (LTC) has great potential on ultra-low emissions for internal combustion engine and has been widely researched in recent years. In order to enhance the stability of diesel LTC and improve the transient performance during low temperature combustion and conventional combustion mode switching, accurate prediction of the in-cylinder combustion state in diesel engine is required, and the control strategy should be adjusted accordingly. A controloriented combustion model which consists of the dynamic model of the intake, compression, combustion, expansion and exhaust process of diesel LTC is developed basing on in-cylinder thermodynamic cycle. The model was verified and validated with experimental data. Comparison between the calculation result and the experimental data shows that in LTC combustion mode, the maximum calculation error of indicated mean effective pressure (IMEP) is -5.4%, and the maximum calculation error of crank angle for 50% burnt fuel (CA50) is 6.6%. The results prove that the state parameters of diesel engine could be predicted accurately with this model, which is fundamental for model-based control of diesel low temperature combustion.

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Exhaust gas recirculation for advanced diesel combustion cycles

Cited by 100 publications

References 39 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

Effects of EGR rate on performance and emissions of a diesel power generator fueled by B7

Control -Oriented Modeling and Experimental Study on Low Temperature Combustion for Diesel Engine

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