This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Fuel Economy Improvements and NOx Reduction by Reduction of Parasitic Losses: Effect of Engine Design
ISSN: 0148-7191, e-ISSN: 2688-3627
Published October 31, 2006 by SAE International in United States
Annotation ability available
Reducing aerodynamic drag and tire rolling resistance in trucks using cooled EGR engines meeting EPA 2004 emissions standards has been observed to result in increases in fuel economy and decreases in NOx emissions. We report here on tests conducted using vehicles equipped a non-EGR engine meeting EPA 2004 emission standards and an electronically-controlled engine meeting EPA 1998 emissions standards. The effects of trailer fairings and single-wide tires on fuel economy and NOx emissions were tested using SAE test procedure J1321. NOx emissions were measured using a portable emissions monitoring system (PEMS). Fuel consumption was estimated by a carbon balance on PEMS output and by the gravimetric method specified by test procedure J1321. Fuel consumption decreased and fuel economy increased by a maximum of about 10 percent, and NOx emissions decreased by a maximum of 20 percent relative to baseline. This compares with NOx reductions of up to 45 percent reported in the earlier test on the cooled EGR engine. The reduction in power requirements in the current test did not result in a corresponding reduction in brake specific NOx emissions, as it did in the earlier test. These results provide further evidence that reducing parasitic losses in heavy-duty highway vehicles will not only reduce fuel consumption and greenhouse gas emissions, but will also provide NOx reductions that pay for themselves through reduced fuel use.
CitationBachman, L., Erb, A., Bynum, C., Shoffner, B. et al., "Fuel Economy Improvements and NOx Reduction by Reduction of Parasitic Losses: Effect of Engine Design," SAE Technical Paper 2006-01-3474, 2006, https://doi.org/10.4271/2006-01-3474.
- U.S. Department of Energy Technology Roadmap for the 21 st Century Truck Program: A Government-Industry Research Partnership Report 21CT-001 Office of Heavy Vehicle Technologies 2000
- Clark, Nigel N. Kern, J. M. Atkinson, CM Nine, R.D. Factors Affecting Heavy-Duty Diesel Vehicle Emissions J. Air & Waste Manage. Assoc. 52 84 94 2002
- Bachman, L. Joseph Erb, Anthony Bynum, Cheryl L. Effect of Single Wide Tires and Trailer Aerodynamics on Fuel Economy and NOx Emissions of Class 8 Line-Haul Tractor-Trailers SAE paper 2005-01-3551 2005
- SAE International Joint TMC/SAE Fuel consumption test procedure - Type II SAE Surface Vehicle Recommended practice J1321 1986
- Control of Emissions of Air Pollution From New Motor Vehicles: In-Use Testing for Heavy-Duty Diesel Engines and Vehicles, Federal Register June 14 2005 70 113 Rules and Regulations 34593 34626 U.S. Environmental Protection Agency
- U.S. Environmental Protection Agency Assessments and Standards Division, In-Use Testing Program for Heavy-Duty Diesel Engines and Vehicles Technical Support Document, EPA 420-R-05-006 2005
- Gautam, Mridul Clark, Nigel Riddle, Wesley Nine, Ralph Wayne, W.S. Maldonado, Hector Agrawal, Archana Carlock, Mark Development and Initial Use of a Heavy-Duty Diesel Truck Test Schedule for Emissions Characterization SAE Paper 2002-01-1753 2002
- SAE International Constant Volume Sampler System for Exhaust Emissions Measurement SAE Surface Vehicle Standard J1094 1992
- Emission standards for 2004 and later model year diesel heavy-duty engines and vehicles Code of Federal Regulations, CFR 40 86.004-11 U.S Government Printing Office 2003 40
- Emission standards for 1998 and later model year diesel heavy duty engines and vehicles Code of Federal Regulations, CFR 40 86.0098-11 U.S Government Printing Office 2003 376
- Insightful Corporation S-Plus for Windows User's Guide Insightful Corporation Seattle Washington 2001