LAPSE:2023.26188
Published Article
LAPSE:2023.26188
Development of a Variable Valve Actuation Control to Improve Diesel Oxidation Catalyst Efficiency and Emissions in a Light Duty Diesel Engine
March 31, 2023
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 NOx emission by 13%.
Keywords
aftertreatment thermal management, diesel engine emissions, light-duty diesel engine, light-off temperature, one- dimensional model, variable valve actuation, variable valve timing, world harmonized light-duty vehicle test procedure
Suggested Citation
Serrano JR, Arnau FJ, Martín J, Auñón Á. Development of a Variable Valve Actuation Control to Improve Diesel Oxidation Catalyst Efficiency and Emissions in a Light Duty Diesel Engine. (2023). LAPSE:2023.26188
Author Affiliations
Serrano JR: CMT—Motores Térmicos, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain [ORCID]
Arnau FJ: CMT—Motores Térmicos, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain [ORCID]
Martín J: CMT—Motores Térmicos, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain [ORCID]
Auñón Á: CMT—Motores Térmicos, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain [ORCID]
Journal Name
Energies
Volume
13
Issue
17
Article Number
E4561
Year
2020
Publication Date
2020-09-03
Published Version
ISSN
1996-1073
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Original Submission
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PII: en13174561, Publication Type: Journal Article
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LAPSE:2023.26188
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doi:10.3390/en13174561
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Mar 31, 2023
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