The hydrodynamic phase of gearbox synchromesh operation: The influence of radial and circumferential grooves

Author:

Paffoni B1,Progri R1,Gras R1,Blouët J1

Affiliation:

1. Laboratoire de Tribologie Institut Supérieur de la Construction Mécanique St Ouen, France

Abstract

An earlier brief phenomenological study (1) allowed the authors to divide the period of synchronization into three distinct stages of operation. Each stage corresponded to different types of friction. Expressions establishing estimations of pressure, axial stress, torque and coefficient of friction were made for the case of a smooth synchromesh ring. These all depend upon the film thickness and angular velocities whose variations in time are unknown. The dynamical study presented here permits the solution to this problem. The influence of circumferential and radial grooves on different parameters (distribution of pressure on the contact area, the load borne by the film, torque transmitted by viscous friction and coefficient of friction) is presented and a comparison of the efficiencies of these two types of grooves is made. This study allows the determination of the initial values necessary for the study of the second stage, which takes place in the presence of a variable friction.

Publisher

SAGE Publications

Subject

Surfaces, Coatings and Films,Surfaces and Interfaces,Mechanical Engineering

Cited by 10 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. A novel shift control concept for multi-speed electric vehicles;Mechanical Systems and Signal Processing;2018-11

2. Study of a synchronizer mechanism through multibody dynamic analysis;Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering;2018-05-14

3. Modeling, analysis and constrained control of wet cone clutch systems: A synchromesh case study;MECHATRONICS;2018

4. Modeling, analysis and constrained control of wet cone clutch systems: A synchromesh case study;Mechatronics;2018-02

5. Analysis and optimization of the gear-shifting process for automated manual transmissions in electric vehicles;Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering;2017-01-27

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