The analytical model is necessarily constructed for understanding the action of synchronisation for the following reasons. The first reason is that the performance of the synchroniser has to be improved for to achieve the increasing demands of drivers for comfort and durability. Another reason is that the phenomena of synchronisation and random mesh all occur in a very short time and the gear-shifting mechanism is so complex. Using traditional experiments to realise the synchroniser is not only hard to understand the complicated process of shifting, but also spends a lot of time and money. Consequently, the paper presents a simulation model to provide an easier and cheaper way for dealing with the study of the synchroniser. The entire simulation model of shifting and separated module, which were simulated shifting from first to second gear ratio, are all constructed in this paper by ADAMSTM. Displacement of the sleeve, relative rotational velocity, cone torque, index torque and relative rotational displacement, which can help to realise the action of components during the shifting process, have been obtained from the analytical model of synchronisation. Moreover, the parametric study chooses some parameters that probably have a larger influence on the synchronisation to figure out the variation and correlation between parameters and simulation results. The results help to engage in optimisation by the Taguchi method. The optimisation reveals that the stiffness of the annular spring and the spline angle on the teeth of the sleeve and outer ring will dominate a higher contribution on the objective function, finishing synchronisation in a much lower coefficient of friction on cone surface. Besides, the simulation results from separated modules can assist to understand the random mesh process between the sleeve and the clutch gear. Among these possible mesh situations had been divided into four different sections, which can describe different mesh cases, the results from these sections can help to realise the phenomena of random mesh between sleeve and clutch and assist to find out and improve shifting time. Finally, hoping the results on this paper can not only provide understanding on the detail synchronisation during shifting process, but also promote the investigation of shifting and synchronisation in the future.
Simulation and analysis of synchronisation and engagement on manual transmission gearbox
Simulation und Analyse von Synchronisierung und Eingriff an einem Wechselschaltgetriebe
International Journal of Vehicle Design ; 43 , 1-4 ; 200-220
2007
21 Seiten, 26 Bilder, 7 Tabellen, 9 Quellen
Article (Journal)
English
Simulation and analysis of synchronisation and engagement on manual transmission gearbox
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