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Fuel efficiency optimization methodologies for series hybrid electric vehicles

Fuel efficiency optimization methodologies for series hybrid electric vehicles
Fuel efficiency optimization methodologies for series hybrid electric vehicles

This paper provides an overview of various optimization formulations that can lead to improved fuel economy for a series hybrid electric vehicle (HEV). The relevance and improvement to the current state-of-the-art are discussed. The formulated optimal control problems (OCP) consist of two individual optimization challenges: vehicle speed optimization and powertrain power-split optimization. These OCPs can be merged leading to a practical and global problem, where all the aspects are optimized simultaneously for a prescribed route and traveling time. Alternatively, the global problem can be approximated by solving individual OCPs, one for each aspect, in steps and combined a posteriori. The optimal solutions in each case are investigated and compared by simulation examples to expose the trade-off between optimality of fuel economy achieved by global optimization and reduction in computational complexity and hence practicality of the two-step solution approximation.

1938-8756
IEEE
Chen, Boli
d5b3f1f2-87e7-4193-a1fa-159577ab2199
Evangelou, Simos A.
ac25016f-e9bf-46b7-b651-edf2448b04ca
Lot, Roberto
ceb0ca9c-6211-4051-a7b8-90fd6f0a6d78
Chen, Boli
d5b3f1f2-87e7-4193-a1fa-159577ab2199
Evangelou, Simos A.
ac25016f-e9bf-46b7-b651-edf2448b04ca
Lot, Roberto
ceb0ca9c-6211-4051-a7b8-90fd6f0a6d78

Chen, Boli, Evangelou, Simos A. and Lot, Roberto (2019) Fuel efficiency optimization methodologies for series hybrid electric vehicles. In 2018 IEEE Vehicle Power and Propulsion Conference (VPPC). IEEE. 6 pp . (doi:10.1109/VPPC.2018.8604991).

Record type: Conference or Workshop Item (Paper)

Abstract

This paper provides an overview of various optimization formulations that can lead to improved fuel economy for a series hybrid electric vehicle (HEV). The relevance and improvement to the current state-of-the-art are discussed. The formulated optimal control problems (OCP) consist of two individual optimization challenges: vehicle speed optimization and powertrain power-split optimization. These OCPs can be merged leading to a practical and global problem, where all the aspects are optimized simultaneously for a prescribed route and traveling time. Alternatively, the global problem can be approximated by solving individual OCPs, one for each aspect, in steps and combined a posteriori. The optimal solutions in each case are investigated and compared by simulation examples to expose the trade-off between optimality of fuel economy achieved by global optimization and reduction in computational complexity and hence practicality of the two-step solution approximation.

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More information

Accepted/In Press date: 31 August 2018
Published date: 10 January 2019
Venue - Dates: 15th IEEE Vehicle Power and Propulsion Conference, VPPC 2018, Chicago, United States, 2018-08-27 - 2018-08-30

Identifiers

Local EPrints ID: 428595
URI: https://eprints.soton.ac.uk/id/eprint/428595
ISSN: 1938-8756
PURE UUID: 9b804241-5314-43b8-8801-48b5e2a9ca51
ORCID for Roberto Lot: ORCID iD orcid.org/0000-0001-5022-5724

Catalogue record

Date deposited: 04 Mar 2019 17:30
Last modified: 20 Jul 2019 00:36

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Contributors

Author: Boli Chen
Author: Simos A. Evangelou
Author: Roberto Lot ORCID iD

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