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Automatic Bleeding of a Hydraulically Actuated Torque Transfer System

Westling, Fredrik LU (2023) MMEM01 20231
Machine Elements
Abstract
This master’s thesis investigates the possibility of a new de-air concept for BorgWarners hydraulically actuated
torque transfer couplings. De-airing of the hydraulic system is required to minimize the compressibility and
ensure low response times. The current de-airing solution works well but limits the usable torque range of
the couplings and produces a lot of noise. To meet increasingly demanding requirements from customers a
new de-airing strategy is needed.
A requirement specification was compiled and a solution was developed using an iterative product development approach. Patents and products were studied in order to get a good grasp of existing concepts. The
most promising concepts were benchmarked against each other and... (More)
This master’s thesis investigates the possibility of a new de-air concept for BorgWarners hydraulically actuated
torque transfer couplings. De-airing of the hydraulic system is required to minimize the compressibility and
ensure low response times. The current de-airing solution works well but limits the usable torque range of
the couplings and produces a lot of noise. To meet increasingly demanding requirements from customers a
new de-airing strategy is needed.
A requirement specification was compiled and a solution was developed using an iterative product development approach. Patents and products were studied in order to get a good grasp of existing concepts. The
most promising concepts were benchmarked against each other and evaluated using calculations, Amesim
simulations and reasoning about their function.
The concept deemed most suitable for the application was a mechanical valve that opens in very short
pressure intervals by moving a valve element between two opposing seats. This solution allows for continuous
de-airing during the usage of the coupling without any electronic actuation or software control.
The optimal switching pressures and valve characteristics of this design were investigated. A valve housing that is compatible with the current coupling housing was designed along with all of the internal valve
components. Finally, the design was dimensioned and drawings were made for the production of prototypes. (Less)
Please use this url to cite or link to this publication:
author
Westling, Fredrik LU
supervisor
organization
course
MMEM01 20231
year
type
H2 - Master's Degree (Two Years)
subject
language
English
id
9136234
date added to LUP
2023-09-14 07:28:47
date last changed
2023-09-14 07:28:47
@misc{9136234,
  abstract     = {{This master’s thesis investigates the possibility of a new de-air concept for BorgWarners hydraulically actuated
torque transfer couplings. De-airing of the hydraulic system is required to minimize the compressibility and
ensure low response times. The current de-airing solution works well but limits the usable torque range of
the couplings and produces a lot of noise. To meet increasingly demanding requirements from customers a
new de-airing strategy is needed.
A requirement specification was compiled and a solution was developed using an iterative product development approach. Patents and products were studied in order to get a good grasp of existing concepts. The
most promising concepts were benchmarked against each other and evaluated using calculations, Amesim
simulations and reasoning about their function.
The concept deemed most suitable for the application was a mechanical valve that opens in very short
pressure intervals by moving a valve element between two opposing seats. This solution allows for continuous
de-airing during the usage of the coupling without any electronic actuation or software control.
The optimal switching pressures and valve characteristics of this design were investigated. A valve housing that is compatible with the current coupling housing was designed along with all of the internal valve
components. Finally, the design was dimensioned and drawings were made for the production of prototypes.}},
  author       = {{Westling, Fredrik}},
  language     = {{eng}},
  note         = {{Student Paper}},
  title        = {{Automatic Bleeding of a Hydraulically Actuated Torque Transfer System}},
  year         = {{2023}},
}