Architecture Optimization of Hybrid Electric Vehicles with Future High-Efficiency Engine

Jinlong Hong, Liangchun Zhao, Yulong Lei and Bingzhao Gao
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Jinlong Hong: State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130025, China
Liangchun Zhao: State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130025, China
Yulong Lei: State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130025, China
Bingzhao Gao: State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130025, China

Energies, 2018, vol. 11, issue 5, 1-23

Abstract: The great development of engine technologies can help to improve the engine characteristics and performance: a better thermal efficiency and an extending fuel economy area, which will subsequently decrease the fuel consumption and thus influence the overall architecture of the vehicle. In this paper, an investigation is carried out to assess the influence of the high-efficiency engine on the transmission gear numbers. First, according to the relevant studies and the integration of the advanced engine technology, a future engine fuel consumption map is obtained, based on which, the preliminary simulations are applied to explore the best match between the transmission and the proposed future engine from the perspective of fuel consumption. The simulation results indicate that the transmission with four gears is the best option to match the future engine while maintaining good fuel economy and meeting the driving demands. Then, based on this conclusion, a new hybrid powertrain architecture, which includes four gears for the engine, is introduced and analyzed in detail, with the advantage of seamless gear shift due to the compensation torque of the motor. Finally, to further examine the fuel economy and gear shift quality of the proposed powertrain, the dynamic model is established and the simulation results demonstrate that the new powertrain architecture shows a good fuel consumption performance and the gear shift process can be achieved without power interruption.

Keywords: fuel consumption; hybrid electric vehicles; architecture optimization; gear shift (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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