Thermal Responses of Connected HEVs Engine and Aftertreatment Systems to Eco-Driving

Connected and automated vehicles (CAVs) have been recognized as providing unprecedented opportunities for substantial fuel economy improvement through CAV-based vehicle speed trajectory optimization (eco-driving). At the same time, the implications of the CAV operation on thermal responses, including those of engine and exhaust aftertreatment system, have not been fully investigated. To this end, firstly, a sequential optimization framework for vehicle speed trajectory planning and powertrain control in hybrid electric CAVs is proposed in this paper. Next, the impact of eco-driving and power split optimization on the engine and catalytic converter thermal responses, as well as on the tailpipe emissions is characterized. Despite an average 16% improvement in fuel economy through sequential optimization, this study shows that eco-driving slows down the thermal responses, which could unfavorably affect the tailpipe emissions.

[1]  Gionata Cimini,et al.  Assessing Fuel Economy From Automated Driving: Influence of Preview and Velocity Constraints , 2016 .

[2]  Kanok Boriboonsomsin,et al.  Energy and emissions impacts of a freeway-based dynamic eco-driving system , 2009 .

[3]  Frank Willems,et al.  Optimal control for integrated emission management in diesel engines , 2017 .

[4]  Francesco Borrelli,et al.  Control of Connected and Automated Vehicles: State of the Art and Future Challenges , 2018, Annu. Rev. Control..

[5]  Xinkai Wu,et al.  A shockwave profile model for traffic flow on congested urban arterials , 2011 .

[6]  Tony Markel,et al.  ADVISOR: A SYSTEMS ANALYSIS TOOL FOR ADVANCED VEHICLE MODELING , 2002 .

[7]  Xun Gong,et al.  Sequential Optimization of Speed, Thermal Load, and Power Split in Connected HEVs* This paper is based upon the work supported by the United States Department of Energy (DOE) under award No. DE-AR0000797. , 2019, 2019 American Control Conference (ACC).

[8]  J. Rugh,et al.  Vehicle Ancillary Load Reduction Project Close-Out Report: An Overview of the Task and a Compilation of the Research Results , 2008 .

[9]  Hao Wang,et al.  Integrated optimization of Power Split, Engine Thermal Management, and Cabin Heating for Hybrid Electric Vehicles , 2019, 2019 IEEE Conference on Control Technology and Applications (CCTA).

[10]  Zhen Yang,et al.  Eco-Trajectory Planning with Consideration of Queue along Congested Corridor for Hybrid Electric Vehicles , 2019 .

[11]  Jongryeol Jeong,et al.  Control Analysis and Thermal Model Development for Plug-In Hybrid Electric Vehicles , 2015 .

[12]  Ilya V. Kolmanovsky,et al.  Two-Layer Model Predictive Battery Thermal and Energy Management Optimization for Connected and Automated Electric Vehicles , 2018, 2018 IEEE Conference on Decision and Control (CDC).

[13]  Kanok Boriboonsomsin,et al.  Dynamic ECO-driving for arterial corridors , 2011, 2011 IEEE Forum on Integrated and Sustainable Transportation Systems.

[14]  Mahdi Shahbakhti,et al.  Early Model-Based Design and Verification of Automotive Control System Software Implementations , 2015 .

[15]  Antonio Sciarretta,et al.  Optimal Ecodriving Control: Energy-Efficient Driving of Road Vehicles as an Optimal Control Problem , 2015, IEEE Control Systems.