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In-Use Compliance Opportunity for Diesel Powertrains
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 3, 2018 by SAE International in United States
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In-use compliance under LEV III emission standards, GHG, and fuel economy targets beyond 2025 poses a great opportunity for all ICE-based propulsion systems, especially for light-duty diesel powertrain and aftertreatment enhancement. Though diesel powertrains feature excellent fuel-efficiency, robust and complete emissions controls covering any possible operational profiles and duty cycles has always been a challenge. Significant dependency on aftertreatment calibration and configuration has become a norm. With the onset of hybridization and downsizing, small steps of improvement in system stability have shown a promising avenue for enhancing fuel economy while continuously improving emissions robustness. In this paper, a study of current key technologies and associated emissions robustness will be discussed followed by engine and aftertreatment performance target derivations for LEV III compliant powertrains. The core of the discussion will be focused on identifying opportunities in engine and aftertreatment hardware and controls to position the diesel applications appropriately for future in-use compliance. Additionally, the authors will discuss the potential diesel powertrain hardware enhancements that could deliver improved emissions robustness while saving fuel, in real-world operation. Since OBD has become an integral part of in-use compliance, this paper will present novel ways to address the malfunction detection with reduced margin of variance while still delivering robust separation between worst performing acceptable (WPA) and best performing unacceptable (BPU) components. In conclusion, a summary of road maps to position diesel technology for future compliance targets will be presented.
- Karthik Vakiti - FEV North America Inc.
- Joel Deussen - FEV North America Inc.
- Claude Pilger - FEV North America Inc.
- Harsha K. Nanjundaswamy - FEV North America Inc.
- Tamas Szailer - FEV North America Inc.
- Michael Franke - FEV North America Inc.
- Dean Tomazic - FEV North America Inc.
- Korfer Thomas - FEV GmbH
- Marcel Romijn - FEV Europe GmbH
- Kai Deppenkemper - RWTH Aachen University
- Giovanni Vagnoni - RWTH Aachen University
CitationVakiti, K., Deussen, J., Pilger, C., Nanjundaswamy, H. et al., "In-Use Compliance Opportunity for Diesel Powertrains," SAE Technical Paper 2018-01-0877, 2018, https://doi.org/10.4271/2018-01-0877.
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