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Development of a Variable Valve Actuation Control to Improve Diesel Oxidation Catalyst Efficiency and Emissions in a Light Duty Diesel Engine

Author

Listed:
  • José R. Serrano

    (CMT—Motores Térmicos, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain)

  • Francisco J. Arnau

    (CMT—Motores Térmicos, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain)

  • Jaime Martín

    (CMT—Motores Térmicos, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain)

  • Ángel Auñón

    (CMT—Motores Térmicos, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain)

Abstract

Growing interest has arisen to adopt Variable Valve Timing (VVT) technology for automotive engines due to the need to fulfill the pollutant emission regulations. Several VVT strategies, such as the exhaust re-opening and the late exhaust closing, can be used to achieve an increment in the after-treatment upstream temperature by increasing the residual gas amount. In this study, a one-dimensional gas dynamics engine model has been used to simulate several VVT strategies and develop a control system to actuate over the valves timing in order to increase diesel oxidation catalyst efficiency and reduce the exhaust pollutant emissions. A transient operating conditions comparison, taking the Worldwide Harmonized Light-Duty Vehicles Test Cycle (WLTC) as a reference, has been done by analyzing fuel economy, HC and CO pollutant emissions levels. The results conclude that the combination of an early exhaust and a late intake valve events leads to a 20% reduction in CO emissions with a fuel penalty of 6% over the low speed stage of the WLTC, during the warm-up of the oxidation catalyst. The same set-up is able to reduce HC emissions down to 16% and NO x emission by 13%.

Suggested Citation

  • José R. Serrano & Francisco J. Arnau & Jaime Martín & Ángel Auñón, 2020. "Development of a Variable Valve Actuation Control to Improve Diesel Oxidation Catalyst Efficiency and Emissions in a Light Duty Diesel Engine," Energies, MDPI, vol. 13(17), pages 1-26, September.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:17:p:4561-:d:408126
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    References listed on IDEAS

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    1. Luján, José Manuel & Serrano, José Ramón & Piqueras, Pedro & García-Afonso, Óscar, 2015. "Experimental assessment of a pre-turbo aftertreatment configuration in a single stage turbocharged diesel engine. Part 2: Transient operation," Energy, Elsevier, vol. 80(C), pages 614-627.
    2. Zammit, J.P. & McGhee, M.J. & Shayler, P.J. & Law, T. & Pegg, I., 2015. "The effects of early inlet valve closing and cylinder disablement on fuel economy and emissions of a direct injection diesel engine," Energy, Elsevier, vol. 79(C), pages 100-110.
    3. Serrano, José Ramón & Olmeda, Pablo & Arnau, Francisco J. & Dombrovsky, Artem & Smith, Les, 2015. "Turbocharger heat transfer and mechanical losses influence in predicting engines performance by using one-dimensional simulation codes," Energy, Elsevier, vol. 86(C), pages 204-218.
    4. Xuewei Pan & Yinghua Zhao & Diming Lou & Liang Fang, 2020. "Study of the Miller Cycle on a Turbocharged DI Gasoline Engine Regarding Fuel Economy Improvement at Part Load," Energies, MDPI, vol. 13(6), pages 1-26, March.
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    Cited by:

    1. Naoya Shigeta & Seyed Ehsan Hosseini, 2020. "Sustainable Development of the Automobile Industry in the United States, Europe, and Japan with Special Focus on the Vehicles’ Power Sources," Energies, MDPI, vol. 14(1), pages 1-32, December.
    2. Monika Andrych-Zalewska & Zdzisław Chłopek & Jerzy Merkisz & Jacek Pielecha, 2020. "Assessment of the Internal Catalyst Efficiency in a Diesel Engine of a Vehicle under the Conditions Simulating Real Driving," Energies, MDPI, vol. 13(24), pages 1-13, December.
    3. Hasan Ustun Basaran, 2023. "Enhanced Exhaust after-Treatment Warmup in a Heavy-Duty Diesel Engine System via Miller Cycle and Delayed Exhaust Valve Opening," Energies, MDPI, vol. 16(12), pages 1-25, June.
    4. Salah A. M. Elmoselhy & Waleed F. Faris & Hesham A. Rakha, 2021. "Validated Analytical Modeling of Diesel Engines Intake Manifold with a Flexible Crankshaft," Energies, MDPI, vol. 14(5), pages 1-20, February.

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