Development of a Variable Valve Actuation Control to Improve Diesel Oxidation Catalyst Efficiency and Emissions in a Light Duty Diesel Engine
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-trea...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-09-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/13/17/4561 |
| _version_ | 1797554711299096576 |
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| author | José R. Serrano Francisco J. Arnau Jaime Martín Ángel Auñón |
| author_facet | José R. Serrano Francisco J. Arnau Jaime Martín Ángel Auñón |
| author_sort | José R. Serrano |
| collection | DOAJ |
| description | 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<sub>x</sub> emission by 13%. |
| first_indexed | 2024-03-10T16:36:52Z |
| format | Article |
| id | doaj.art-76b9a715f10740a7b044fb9afc048fa2 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T16:36:52Z |
| publishDate | 2020-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-76b9a715f10740a7b044fb9afc048fa22023-11-20T12:23:46ZengMDPI AGEnergies1996-10732020-09-011317456110.3390/en13174561Development of a Variable Valve Actuation Control to Improve Diesel Oxidation Catalyst Efficiency and Emissions in a Light Duty Diesel EngineJosé R. Serrano0Francisco J. Arnau1Jaime Martín2Ángel Auñón3CMT—Motores Térmicos, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, SpainCMT—Motores Térmicos, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, SpainCMT—Motores Térmicos, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, SpainCMT—Motores Térmicos, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, SpainGrowing 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<sub>x</sub> emission by 13%.https://www.mdpi.com/1996-1073/13/17/4561variable valve actuationvariable valve timinglight-duty diesel engineaftertreatment thermal managementone- dimensional modelworld harmonized light-duty vehicle test procedure |
| spellingShingle | José R. Serrano Francisco J. Arnau Jaime Martín Ángel Auñón Development of a Variable Valve Actuation Control to Improve Diesel Oxidation Catalyst Efficiency and Emissions in a Light Duty Diesel Engine Energies variable valve actuation variable valve timing light-duty diesel engine aftertreatment thermal management one- dimensional model world harmonized light-duty vehicle test procedure |
| title | Development of a Variable Valve Actuation Control to Improve Diesel Oxidation Catalyst Efficiency and Emissions in a Light Duty Diesel Engine |
| title_full | Development of a Variable Valve Actuation Control to Improve Diesel Oxidation Catalyst Efficiency and Emissions in a Light Duty Diesel Engine |
| title_fullStr | Development of a Variable Valve Actuation Control to Improve Diesel Oxidation Catalyst Efficiency and Emissions in a Light Duty Diesel Engine |
| title_full_unstemmed | Development of a Variable Valve Actuation Control to Improve Diesel Oxidation Catalyst Efficiency and Emissions in a Light Duty Diesel Engine |
| title_short | Development of a Variable Valve Actuation Control to Improve Diesel Oxidation Catalyst Efficiency and Emissions in a Light Duty Diesel Engine |
| title_sort | development of a variable valve actuation control to improve diesel oxidation catalyst efficiency and emissions in a light duty diesel engine |
| topic | variable valve actuation variable valve timing light-duty diesel engine aftertreatment thermal management one- dimensional model world harmonized light-duty vehicle test procedure |
| url | https://www.mdpi.com/1996-1073/13/17/4561 |
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