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Impact of Lateral Alignment for Cooling Airflow during Heavy-Truck Platooning
Technical Paper
2021-01-0231
ISSN: 0148-7191, e-ISSN: 2688-3627
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SAE WCX Digital Summit
Language:
English
Abstract
A truck platooning system was tested using two heavy-duty tractor-trailer trucks on a closed test track to investigate the thermal control/heat rejection system sensitivity to intentional lateral offsets over a range of intervehicle spacings. Previous studies have shown the following vehicle can experience elevated temperatures and reduced airflow through the cooling package as a result of close-formation platooning. Four anemometers positioned across the grille of the following trucks as well as aligned and multiple offset positions are used to evaluate the sensitivity of the impact. Straight sections of the track are isolated for the most accurate airflow impact measurements and to be most representative of on-highway driving. An intentional lateral offset in truck platooning is considered as a controls approach to mitigate reduced cooling efficacy at close following scenarios where the highest platoon savings are achieved. The truck platooning system was tested at four gap distances from 9 to 23 meters and the following truck was either aligned with the lead or offset with a 25% width (0.65 m) or 50% width (1.3 m) lateral distance. The experimental results clearly show that offset driving is effective at bringing cooling airflow from 56% with an aligned platoon back up to 75%-80% with minimal impact to fuel savings. In addition, the offset driving can also reduce the trailing truck’s engine coolant temperature by 2°C and the corresponding underhood temperature rise by 10°C. The test outcomes indicate a plausible controls strategy to mitigate reduced cooling flow during hot-weather truck platooning while still enabling the highest-energy-saving, close-following scenarios.
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Zhang, C., Lammert, M., and McAuliffe, B., "Impact of Lateral Alignment for Cooling Airflow during Heavy-Truck Platooning," SAE Technical Paper 2021-01-0231, 2021, https://doi.org/10.4271/2021-01-0231.Data Sets - Support Documents
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References
- Marcu , B. and Browand , F. Aerodynamic Forces Experienced by a 3-Vehicle Platoon in a Crosswind SAE Technical Paper 1999-01-1324 1999 https://doi.org/10.4271/1999-01-1324
- Tsuei , L. and Savas , O. Transient Aerodynamics of Vehicle Platoons During in-line Oscillations Journal of Wind Engineering and Industrial Aerodynamics 89 1085 1111 2001
- Salari , K. and Ortega , J. Experimental Investigation of the Aerodynamic Benefits of Truck Platooning SAE Technical Paper 2018-01-0732 2018 https://doi.org/10.4271/2018-01-0732
- McAuliffe , B. and Ahmadi-Baloutaki , M. A Wind-Tunnel Investigation of the Influence of Separation Distance, Lateral Stagger, and Trailer Configuration on the Drag-Reduction Potential of a Two-Truck Platoon SAE Int. J. Commer. Veh. 11 2 125 150 2018 https://doi.org/10.4271/02-11-02-0011
- McAuliffe , B.R. , Ahmadi-Baloutaki , M. , Croken , M. , and Raeesi , A. 2017
- Bonnet , C. and Fritz , H. Fuel Consumption Reduction in a Platoon: Experimental Results with Two Electronically Coupled Trucks at Close Spacing SAE Technical Paper 2013-01-0767 2000 https://doi.org.10.4271/2013-01-0767
- Browand , F. , McArthur , J. , and Radovich , C. 2004
- Al Alam , A. , Gattami , A. , and Johansson , K. An Experimental Study on the Fuel Reduction Potential of Heavy Duty Vehicle Platooning 13th International IEEE Annual Conference on Intelligent Transportation Systems Madeira Island, Portugal 2010
- Roeth , M. 2013
- Lammert , M. , Duran , A. , Diez , J. , Burton , K. et al. Effect of Platooning on Fuel Consumption of Class 8 Vehicles Over a Range of Speeds, Following Distances, and Mass SAE Int. J. Commer. Veh. 7 2 2014 https://doi.org/10.4271/2014-01-2438
- Tsugawa , S. Results and Issues of an Automated Truck Platoon within the Energy ITS Project 2014 IEEE Intelligent Vehicles Symposium (IV) Dearborn, MI June 8-11 2014
- Humphreys , H. and Bevly , D. Computational Fluid Dynamic Analysis of a Generic 2 Truck Platoon SAE Technical Paper 2016-01-8008 2016 https://doi.org/10.4271/2016-01-8008
- Roberts , J. , Mihelic , R. , Roeth , M. , and Rondini , D. 2016
- Bevly , D. , Murray , C. , Lim , A. , Turochy , R. , et al. 2017
- McAuliffe , B. , Lammert , M. , Lu , X.-Y. , Shladover , S.E. et al. Influences on Energy Savings of Heavy Trucks Using Cooperative Adaptive Cruise Control SAE WCX18 2018-01-1181 April 2018 https://doi.org/10.4271/2018-01-1181
- Zhang , C. and Lammert , M.P. Impact to Cooling Airflow from Truck Platooning SAE Technical Paper 2020-01-1298 2020 https://doi.org/10.4271/2020-01-1298
- Lammert , M.P. , McAuliffe , B. , Smith , P. , Raeesi , A. et al. Impact of Lateral Alignment on the Energy Savings of a Truck Platoon SAE Technical Paper 2020-01-0594 2020 https://doi.org/10.4271/2020-01-0594
- SAE J1321 Fuel Consumption Test Procedure - Type II Surface Vehicle Recommended Practice J1321 2012
- McAuliffe , B.R. , Smith , P. , Raeesi , A. , Hoffman , M. , and Bevly , D. Track-Based Aerodynamic Testing of a Two-Truck Platoon SAE Technical Paper 21SS-0174