Anzeige
Erschienen in:
2022 | OriginalPaper | Buchkapitel
From Concept to Series: Advanced Development Process for Euro VII Engines
verfasst von : Dávid Kovács, Reza Rezaei, Marian Mennig, Thaddaeus Delebinski, Jörn Seebode
Erschienen in: Heavy-Duty-, On- und Off-Highway-Motoren 2021
Verlag: Springer Fachmedien Wiesbaden
Aktivieren Sie unsere intelligente Suche, um passende Fachinhalte oder Patente zu finden.
Wählen Sie Textabschnitte aus um mit Künstlicher Intelligenz passenden Patente zu finden. powered by
Markieren Sie Textabschnitte, um KI-gestützt weitere passende Inhalte zu finden. powered by
Abstract
The latest proposals by CLOVE (Consortium for ultra-low Vehicle Emissions) for Heavy-duty Euro VII legislation forecast significant tightening of pollutant emissions e.g. NOx while also initiate an extension of the testing conditions leading to exceptional challenges in the powertrain development. In addition, the already phased-in regulations regarding CO2 enforce a continuous reduction in fuel consumption. The legislative trends are similar in the US, where the already approved CARB 2027 regulation introduces a reduction in NOx emission limits by 90%, while the GHG legislation requires reduced CO2 emissions.
In order to fulfill the emission limits, a rapid start of NOx conversion in the exhaust after-treatment (EAT) is inevitable. For this purpose, optimal calibration of engine-based thermal management in combination with advanced EAT layout are key technologies. Furthermore, cold start and cold ambient conditions during testing with low load profiles using as low as 0% payload may also require external heating measures of the EAT.
In this study a systematic investigation is carried out by means of model-based holistic approach targeting the definition of the EAT layout and optimal thermal management calibration for future legislations. The close-coupled dual-stage SCR with twin dosing is considered with multiple system layouts in order to minimize the fuel penalty during the heat up phases. An optimization of engine hardware concept and the engine thermal management are carried out and the potentials regarding CO2 emissions quantified.
The investigations and the concept development consider both CARB ultra low NOx as well as Euro VII future legislations.