Gear rattle modelling and analysis for automotive manual transmissions

Citation
My. Wang et al., Gear rattle modelling and analysis for automotive manual transmissions, P I MEC E D, 215(D2), 2001, pp. 241-258
Citations number
25
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Mechanical Engineering
Journal title
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART D-JOURNAL OF AUTOMOBILE ENGINEERING
ISSN journal
0954-4070 → ACNP
Volume
215
Issue
D2
Year of publication
2001
Pages
241 - 258
Database
ISI
SICI code
0954-4070(2001)215:D2<241:GRMAAF>2.0.ZU;2-W
Abstract
This paper describes a model for torsional vibration of automotive manual t ransmissions and its subsequent analysis. The model is developed for the pu rpose of analysis and prediction of gear rattles. Efforts have been made to include as many components of power train as possible and to study the rat tle responses of all the speeds. Elements of the model include engine, clut ch, flywheel, laden and unladen gears, and shafts. Numerical methods availa ble in MATLAB for solving the ordinary differential equations are employed for the dynamic analysis. Results are presented to show the effectiveness o f the modelling and analysis scheme. A software package has also been devel oped to build and analyse any power train model. The package was used to an alyse the Daimler-Chrysler T350 transmission and the results are presented in the paper. It is shown that the gear rattle may exhibit three major mode s of double-sided, single-sided or irregular impacts. A rattle index has be en used to compare the rattle levels produced by different gear pairs. This could be very useful for the purpose of tuning the clutch for the best rat tle noise reduction.