Thesis topic proposal
László Lovas
Study of a dog teeth clutch


Institute: Budapest University of Technology and Economics
transportation and vehicle engineering
Kálmán Kandó Doctoral School of Transportation and Vehicle Engineering

Thesis supervisor: László Lovas
Location of studies (in Hungarian): Department of Railway Vehicles and Vehicle System Analysis
Abbreviation of location of studies: VJJT

Description of the research topic:

Dog teeth clutches are generally applied to engage gears in gearboxes of either internal combustion engine or electric engine vehicles. The success of the gearshift depends on the gearbox layout, the tooth geometry, the shifting force and the rpm difference during shifting. To understand the topic, three main subsystems must be studied in details: the gear system in the gearbox, the actuating system and the transmission of the power from the gearbox to the wheels.
Study of the shifting mechanism has been started at the department 10 years ago. PhD thesis and MSc diplomas have been realized on synchromesh behavior and spline clutch shiftability.
Goal of the research:
Study of the shiftability of a dog teeth clutch at high rpm difference. Understanding the influence of the parts stiffness on the the shiftability. Finding actuator settings to reach a succesful gearshift.
Work to be done:
Survey of the scientific literature: 1 year
Numerical model building: 1 year
Test rig setup: 0,5 year
Measurements, study and discussion of the results 1 year
Writing the thesis: 0,5 year

Required language skills: English
Recommended language skills (in Hungarian): French, German, Hungarian
Further requirements: 
good knowledge of 3D CAD systems
good knowledge of Matlab
good programming skills (Matlab, C#…)

Number of students who can be accepted: 1

Deadline for application: 2023-06-01

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