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A CFD Modelling Approach for the Operation Analysis of an Exhaust Backpressure Valve Used in a Euro 6 Diesel Engine

Author

Listed:
  • Francisco J. Martos

    (Escuela de Ingenierías Industriales, Universidad de Málaga, c/Doctor Ortiz Ramos, s/n, 29071 Málaga, Spain)

  • José A. Soriano

    (Escuela de Ingeniería Industrial y Aeroespacial, Campus de Excelencia Internacional en Energía y Medioambiente, Universidad de Castilla-La Mancha, Av. Carlos III, s/n, 45071 Toledo, Spain)

  • Andrei Braic

    (Escuela de Ingeniería Industrial y Aeroespacial, Campus de Excelencia Internacional en Energía y Medioambiente, Universidad de Castilla-La Mancha, Av. Carlos III, s/n, 45071 Toledo, Spain)

  • Pablo Fernández-Yáñez

    (Escuela de Ingeniería Industrial y Aeroespacial, Campus de Excelencia Internacional en Energía y Medioambiente, Universidad de Castilla-La Mancha, Av. Carlos III, s/n, 45071 Toledo, Spain)

  • Octavio Armas

    (Escuela de Ingeniería Industrial y Aeroespacial, Campus de Excelencia Internacional en Energía y Medioambiente, Universidad de Castilla-La Mancha, Av. Carlos III, s/n, 45071 Toledo, Spain)

Abstract

Harvesting residual thermal energy from exhaust gases with thermoelectric generators is one of the paths that are currently being explored to achieve more sustainable and environmentally friendly means of transport. In some cases, thermoelectric generators are installed in a by-pass configuration to regulate the mass flow entering the thermoelectric generator. Some manufacturers are using throttle valves with electromechanical actuators and electronic control in the exhaust pipe to improve techniques for active control of pollutant emissions in reciprocating internal combustion engines, such as the exhaust gas recirculation. The above-mentioned circumstances have motivated the approach of this work: computational fluid dynamics (CFD) modelling of the operation of a throttle valve used for establishing adequate exhaust backpressure conditions to achieve the low pressure exhaust gas recirculation in Euro 6 engines. The aim of this model is to understand the flow control process with these types of valves in order to incorporate them in an exhaust system that will include two thermoelectric generators used to convert residual thermal energy into electrical energy. This work presents a computational model of the flow through the throttle valve under different temperatures and mass flow rates of the exhaust gas with different closing positions. For all cases, the values of the pressure drop were obtained. In all cases studied, the level of agreement between the modelled and experimental results exceeds 90%. The developed model has helped to propose a correlation to estimate the mass flow rate of exhaust gas from easily measurable quantities.

Suggested Citation

  • Francisco J. Martos & José A. Soriano & Andrei Braic & Pablo Fernández-Yáñez & Octavio Armas, 2023. "A CFD Modelling Approach for the Operation Analysis of an Exhaust Backpressure Valve Used in a Euro 6 Diesel Engine," Energies, MDPI, vol. 16(10), pages 1-15, May.
  • Handle: RePEc:gam:jeners:v:16:y:2023:i:10:p:4112-:d:1147876
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    References listed on IDEAS

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    1. Luján, José Manuel & Guardiola, Carlos & Pla, Benjamín & Reig, Alberto, 2015. "Switching strategy between HP (high pressure)- and LPEGR (low pressure exhaust gas recirculation) systems for reduced fuel consumption and emissions," Energy, Elsevier, vol. 90(P2), pages 1790-1798.
    2. Ma, Zetai & Zhang, Kun & Xiang, Hanchun & Gu, Jie & Yang, Mingyang & Deng, Kangyao, 2023. "Experimental study on influence of high exhaust backpressure on diesel engine performance via energy and exergy analysis," Energy, Elsevier, vol. 263(PB).
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    Cited by:

    1. Lis Corral-Gómez & Francisco J. Martos & Pablo Fernández-Yáñez & Octavio Armas, 2023. "A CFD Modelling Approach of Fuel Spray under Initial Non-Reactive Conditions in an Optical Engine," Energies, MDPI, vol. 16(18), pages 1-16, September.
    2. Jianbo Zhou & Rui Zhang & Wenxiong Xi & Weidong Zhao, 2023. "Computational Analysis on Combustion Control of Diesel Engines Fueled with Ester Alcohol Diesel," Energies, MDPI, vol. 16(16), pages 1-15, August.

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