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An investigation of cam-roller mechanism applied in sphere cam engine

  • Mechanical Engineering, Control Science and Information Engineering
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Abstract

As an alternative power source for hybrid electrical vehicle(HEV), electric generating system(EGS) driven by sphere cam engine(SCE) is said to own higher power density and integration. In this work, the structure and working principle of EGS were introduced, based on which the advantages of EGS were displayed. The profile of sphere cam was achieved after the desired motion of piston was given. After establishing the dynamic model of power transmission mechanism, the characteristics of cam-roller mechanism were studied. The results show that the optimal cam profile of SCE is a sinusoid curve which has two peaks and two valleys and a mean pressure angle of 47.19°. Because of the special cam shape, the trace of end surface center of piston is an eight-shape curve on a specific sphere surface. SCE running at speed of 3000 r/min can generate the power of 33.81 kW, which could satisfy the need of HEVs. However, the force between cylinder and piston skirt caused by Coriolis acceleration can reach up to 1182 N, which leads to serious wear between cylinder liner and piston skirt and may shorten the lifespan of SCE.

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Authors and Affiliations

  1. College of Mechatronic Engineering and Automation, National University of Defense Technology, Changsha, 410073, China

    Lei Zhang  (张雷), Cun-yun Pan  (潘存云), Xiao-jun Xu  (徐小军), Hai-jun Xu  (徐海军) & Zheng-zhou Zhang  (张正洲)

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  1. Lei Zhang  (张雷)
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  2. Cun-yun Pan  (潘存云)
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  3. Xiao-jun Xu  (徐小军)
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  4. Hai-jun Xu  (徐海军)
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  5. Zheng-zhou Zhang  (张正洲)
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Corresponding author

Correspondence to Cun-yun Pan  (潘存云).

Additional information

Foundation item: Projects(51475464, 51175500, 51575519) supported by the National Natural Science Foundation of China

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Zhang, L., Pan, Cy., Xu, Xj. et al. An investigation of cam-roller mechanism applied in sphere cam engine. J. Cent. South Univ. 23, 825–833 (2016). https://doi.org/10.1007/s11771-016-3129-6

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  • DOI: https://doi.org/10.1007/s11771-016-3129-6

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