This content is not included in your SAE MOBILUS subscription, or you are not logged in.
CARB Low NOx Stage 3 Program - Modified Engine Calibration and Hardware Evaluations
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 14, 2020 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
With the conclusion of the California Air Resources Board (CARB) Stage 1 Ultra-Low NOX (ULN) program, there continues to be a commitment for identifying potential pathways to demonstrate 0.02 g/bhp-hr NOX emissions. The Stage 1 program focused on achieving the ULN levels on the heavy-duty regulatory cycles utilizing a turbo-compound engine which required the integration of novel catalyst technologies and a supplemental heat source. While the aftertreatment configuration provided a potential solution to meet the ULN target, a complicated approach with a greenhouse gas (GHG) penalty was required to overcome challenges from low temperature exhaust. A subsequent Stage 2 program was concerned with the development of a new low load test cycle and evaluating the trade-off between GHG and tailpipe NOX on the Stage 1 ULN solution. The current Stage 3 program focuses on both the regulatory cycles and the new low load cycle, but leverages a different engine architecture that is more representative of the broader heavy-duty industry to meet the Phase 2 GHG regulations and to simplify the ULN aftertreatment solution. Aftertreatment thermal management is a key aspect of achieving ULN on both the regulatory cycles and the low load cycle. Therefore, a more aggressive engine calibration was developed on the Stage 3 platform using the available engine actuators for aftertreatment heat up and thermal management. This modified calibration was then used to evaluate additional hardware technologies under steady-state and transient operation to assess the trade-offs between exhaust gas characteristics, emissions, and fuel consumption. A simple ranking system was applied to the transient results and with cylinder deactivation being selected to carry forward into the subsequent tasks of the Stage 3 ULN program.
CitationNeely, G., Sharp, C., and Rao, S., "CARB Low NOx Stage 3 Program - Modified Engine Calibration and Hardware Evaluations," SAE Technical Paper 2020-01-0318, 2020, https://doi.org/10.4271/2020-01-0318.
Data Sets - Support Documents
|Unnamed Dataset 1|
|Unnamed Dataset 2|
|Unnamed Dataset 3|
|Unnamed Dataset 4|
|Unnamed Dataset 5|
|Unnamed Dataset 6|
- California Air Resources Board X https://ww3.arb.ca.gov/msprog/hdlownox/white_paper_04182019a.pdf
- California Air Resources Board X https://www.arb.ca.gov/msprog/hdlownox/hdlownox.htm
- Sharp , C. , Webb , C. , Neely , G. , Carter , M. et al. Achieving Ultra Low NO X Emissions Levels with a 2017 Heavy-Duty On-Highway TC Diesel Engine and an Advanced Technology Emissions System - Thermal Management Strategies SAE Int. J. Engines 10 4 1697 1712 2017 https://doi.org/10.4271/2017-01-0954
- Sharp , C. , Webb , C. , Neely , G. , Yoon , S. et al. Achieving Ultra Low NO X Emissions Levels with a 2017 Heavy-Duty On-Highway TC Diesel Engine and an Advanced Technology Emissions System - NO X Management Strategies SAE Int. J. Engines 10 4 2017 https://doi.org/10.4271/2017-01-0958
- Sharp , C. , Webb , C. , Yoon , S. , Carter , M. , and Henry , C. Achieving Ultra Low NOx Emissions Levels with a 2017 Heavy-Duty On-Highway TC Diesel Engine - Comparison of Advanced Technology Approaches SAE Int. J. Engines 10 4 2017 https://doi.org/10.4271/2017-01-0956
- McCarthy , J.E. Jr. 2 X https://www.integer-research.com/conferences/ies-brazil-2019/ 2019
- Neely , G.D. , Sharp , C.A. , Pieczko , M.S. , and McCarthy , J.E. Simultaneous NO X and CO 2 Reduction for Meeting Future CARB Standards Using a Heavy Duty Diesel CDA-NVH Strategy SAE International Journal of Engines
- Zavala , B. , Sharp , C. , Neely , G. , and Rao , S. CARB Low NO X Stage 3 Program - Aftertreatment Evaluation and Final Demonstration System Results SAE Technical Paper 2020-01-1402 2020 https://doi.org/10.4271/2020-01-1402
- Rao , S. , Sarlashkar , J. , Rengarajan , S. , Sharp , C. , and Neely , G. A Controls Overview on Achieving Ultra-Low NO X SAE Technical Paper 2020-01-1404 2020 https://doi.org/10.4271/2020-01-1404