Control strategy for a range-extended electric sanitation truck based on efficiency optimization(PDF)
长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]
- Issue:
- 2018年01期
- Page:
- 105-111
- Research Field:
- 汽车与机械工程
- Publishing date:
Info
- Title:
- Control strategy for a range-extended electric sanitation truck based on efficiency optimization
- Author(s):
- LIU Zhao; XIE Shao-bo
- School of Automobile, Chang’an University, Xi’an 710064, Shaanxi, China
- Keywords:
- automobile engineering; range-extended electric sanitation truck; simulation; control strategy; fixed-point power generation; power servo
- PACS:
- U469.72
- DOI:
- -
- Abstract:
- In order to improve the energy conversion efficiency and equivalent fuel economy of the whole vehicle for a range-extended sanitation truck in the process of extended range, three control strategies of the engine-generator unit (EGU) were compared by taking a range-extended electric sanitation truck as an example. Firstly, the overall efficiency characteristics and the efficiency curve of the EGU were obtained based on the engine’s fuel consumption characteristics and generator’s efficiency characteristics of the bench test, and then the simulation model of the whole vehicle’s forward dynamic system was built on the MATLAB/Simulink/Stateflow platform. Then, the equivalent fuel consumption of the range-extended electric vehicle was deduced. All consumed fuel and electric energy were converted into a single amount of fuel. Based on the typical operating conditions of urban passenger cars in China, three control strategies including the fixed-point power generation of the EGU, the servo output power of the EGU under optimal efficiency curve and servo output power of EGU with constant speed were used to conduct the simulation experiment of vehicle driving. The results show that in fixed-point power generation mode, the EGU can always work at the maximum efficiency point so as to achieve the optimal energy conversion efficiency. At this time, the fuel consumption of the whole vehicle is 29.22 L per 100 km. In the power servo with constant speed, the efficiency of EGU is the lowest, the fuel consumption of which is 33.41 L per 100 km. In the power servo mode under optimal efficiency curve, the fuel consumption of EGU is 30.63 L per 100 km, which is reduced by about 2.78 L than the power servo with constant speed. By comparing the simulation results of three EGUs’ control strategies, it is found that under the mode of electricity-consumption and electricity-maintenance of a range-extended sanitation truck, fixed-point power generation mode can achieve the optimal working efficiency of EGU and achieve the minimum fuel consumption per 100 km of the whole vehicle, which can be regarded as the optimal control strategy of EGU for the range-extended sanitation truck.
Last Update: 2018-02-06