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Experiment and Simulation of Medium-Duty Tactical Truck for Fuel Economy Improvement
Wayne State University, 4855 Fourth St., Detroit, MI 48202, USA
ASRC-WTSI, Inc., 35660 Beattie Dr., Sterling Heights, MI 48312, USA
* Author to whom correspondence should be addressed.
Received: 26 November 2010; in revised form: 5 January 2011 / Accepted: 26 January 2011 / Published: 4 February 2011
Abstract: Fuel economy improvement on medium-duty tactical truck has and continues to be a significant initiative for the U.S. Army. The focus of this study is the investigation of Automated Manual Transmissions (AMT) and mild hybridization powertrain that have potential to improve the fuel economy of the 2.5-ton cargo trucks. The current platform uses a seven-speed automatic transmission. This study utilized a combination of on-road experimental vehicle data and analytical vehicle modeling and simulation. This paper presents the results of (1) establishment of a validated, high fidelity baseline analytical vehicle model, (2) modeling and simulation of two AMTs and their control strategy, (3) optimization of transmissions shift schedules, and (4) modeling and simulation of engine idle stop/start and Belt-Integrated-Starter-Generator (B-ISG) systems to improve the fuel economy. The fuel economy discrepancy between experimental average and the baseline simulation result was 2.87%. The simulation results indicated a 14.5% and 12.2% fuel economy improvement for the 10-speed and 12-speed AMT respectively. A stop/start system followed by a B-ISG mild hybrid system incorporating regenerative braking was estimated to improve fuel economy 3.39% and 10.2% respectively.
Keywords: AMT; automated manual transmission; fuel economy; transmission shift schedule; tactical truck
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Liao, Y.-J.; Quail, A.M., Jr. Experiment and Simulation of Medium-Duty Tactical Truck for Fuel Economy Improvement. Energies 2011, 4, 276-293.
Liao Y-J, Quail AM, Jr. Experiment and Simulation of Medium-Duty Tactical Truck for Fuel Economy Improvement. Energies. 2011; 4(2):276-293.
Liao, Yeau-Jian Gene; Quail, Allen M., Jr. 2011. "Experiment and Simulation of Medium-Duty Tactical Truck for Fuel Economy Improvement." Energies 4, no. 2: 276-293.