吉林大学学报(工学版) ›› 2015, Vol. 45 ›› Issue (4): 1139-1147.doi: 10.13229/j.cnki.jdxbgxb201504017

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Analysis of energy saving ratio in series hybrid electric bulldozer

ZHANG Bao-di1, ZHANG Xin1, XI Li-he1, LIU Lin2   

  1. 1.School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China;
    2.New Energy Technology Center,Weichai Power Co., Ltd., Weifang 261001, China
  • Received:2013-12-17 Online:2015-07-01 Published:2015-07-01

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Abstract: In order to explore the effect, the mechanism and the potential of energy saving in using series hybrid electric bulldozer, an analytical formula was deduced to present the relationship between the Equivalent Fuel Saving Ratio (EFSR) and the influencing factors. Combing simulation and analytical method, the mechanism of energy saving and the impacts of components' efficiencies and drive cycles on the energy saving effect were analyzed. The limit values of the EFSR were calculated. Results show that under typical drive cycle, the energy saving mainly originates from the higher components' efficiencies in the diesel-electric routine of the powertrain; the engine efficiency has the largest influence on the EFSR among all components' efficiencies. With the increase in bulldozing resistance or vehicle speed, the EFSR decreases. Moreover, the energy saving limit under various optimization measures can be calculated using the proposed analytical formula.

Key words: mechanical design, hybrid electric powertrain, bulldozer, equivalent fuel saving ratio, equivalent energy conversion efficiency, analytical method

CLC Number: 

  • TU623.5
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