Dynamic Characteristics of Vehicular Planetary Gears Influenced by Engine Excitation and Backlash Based on Nonlinear Torsional Vibration Model

  • Hui LiuEmail author
  • Zhongchang Cai
  • Changle Xiang
Conference paper
Part of the Lecture Notes in Electrical Engineering book series (LNEE, volume 201)


Multiple gear ratios in automatic transmission are achievable with multi-stage planetary gears, where there are both the loaded planetary gear and the idle planetary gear under some gear ratios operation. Due to the change of road conditions, engine runs with different rotational speed and torque, which brings an external fluctuation excitation to the automatic transmission planetary gear set. In addition, the gear backlash becomes larger with the wear increasing during the running. Both engine excitation and gear backlash are important factors that not only influence the vibration characteristic and meshing state of the loaded planetary gear but also those of the idle planetary gear. The objective of this paper was to investigate the change of meshing force state of loaded planetary gear and idle planetary gear influenced by the different backlash and the engine excitation based on a nonlinear torsional vibration model.


Planetary gears Torsional vibration Nonlinear vibration Backlash Meshing force 



This work was partially supported by Natural Nature Science Foundation of China (50905018,51075033). The authors would like to express gratitude to its financial support.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  1. 1.School of Mechanical and EngineeringBeijing Institute of TechnologyBeijingChina
  2. 2.National Key Laboratory of Science and Technology on Vehicle Transmission LaboratoryBeijing Institute of TechnologyBeijingChina

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