Automotive Gearbox Synchronizer Life Evaluation using Regression Analysis under Torsional Vibration condition Mahindra and Mahindra Limited, MRV, Chennai

Format:

Book

Conference/Event

Author/Creator:

K, Barathiraja, author.

Contributor:

JAMADADE, GAJANAN

K, Jibin Paul

S, Rakesh

Conference Name:

Symposium on International Automotive Technology (2021-09-29 : Pune, India)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2021

Summary:

Synchronizers are the critical element in manual transmission to match the speed of target gear and allows smooth gear shifting. Generally, synchronizer failures are related to design parameters, like geometrical construction, material, and lubrication. This paper throws light on one different parameter for synchronizer design namely the angular accelerations which are imposed on synchronizer, due to vehicle level systems. The recent developed high-power density engines develop angular accelerations due to smaller flywheels. These angular accelerations are detrimental to the life of synchronizers. Brass synchronizers exhibit structural damage in synchronizer due to the angular acceleration. The carbon liner synchronizers do not withstand the angular acceleration and fail rapidly due to liner wear. The synchronizer rings can move freely in the available space due to rattling. The synchronizers which experience higher angular acceleration fails immediately. The simulation of synchronizer failure on vehicles with different configurations and interface conditions are cumbersome and time-consuming activity. A test setup was developed to simulate the vehicle level angular accelerations and multiple combinations of parameters were tried out. To get an optimal solution for the synchronizer wear reduction a multiple regression analysis is used to investigate the criticality of each factor and the levels. The developed regression equation can be used to predict the synchronizer wear. The optimal solution was tested on the vehicle for final prove out. This test set up and methodology has been successfully used for resolution of very uncommon failure mode in synchronizer. The detailed progressive path for this evolved methodology has captured in this paper. The methodology adopted gives a statistical analysis and sustainable results for an engineering problem

Notes:

Vendor supplied data

Publisher Number:

2021-26-0494

Access Restriction:

Restricted for use by site license