Article
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Long Downhill Braking and Energy Recovery of Pure Electric Commercial Vehicles
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Version 1
: Received: 5 January 2024 / Approved: 8 January 2024 / Online: 8 January 2024 (08:21:13 CET)
A peer-reviewed article of this Preprint also exists.
Cai, W.; Liu, C. Long Downhill Braking and Energy Recovery of Pure Electric Commercial Vehicles. World Electr. Veh. J. 2024, 15, 51. Cai, W.; Liu, C. Long Downhill Braking and Energy Recovery of Pure Electric Commercial Vehicles. World Electr. Veh. J. 2024, 15, 51.
Abstract
The thermal degradation of brakes has a significant impact on the stability of pure electric commercial vehicles during long downhill braking. Based on road slope and using fuzzy control method, design strategies for motor regenerative braking force and friction braking force distribution, with the aim of reducing friction braking force, improving braking stability, and recovering braking energy. By establishing driving conditions on roads with different slopes and using numerical analysis methods to verify the proposed control strategy. the results show that under the 6% constant slope driving condition, the vehicle maintains a constant speed of 30km/h downhill driving, and the braking energy recovery rate reaches 50.93%; Under the condition of 3% -6% gradient driving, the vehicle speed fluctuates slightly, but it can still be maintained at a constant speed of 30km/h for downhill driving through the adjustment of the motor's reverse drag characteristic, with a braking energy recovery rate of 49.97%; During the process of driving downhill at a constant speed, the frictional braking force does not participate in braking; The braking energy recovery rate is determined by the slope and braking deceleration.
Keywords
electric commercial vehicle; slope driving conditions; long downhill braking; brake energy recovery; fuzzy control
Subject
Engineering, Automotive Engineering
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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