Development of an accumulator actuation concept for a torque vectoring and disconnect system
(2026) MMKM10 20252Innovation
- Abstract
- This master’s thesis has examined the feasibility of an accumulator-based actuation method for the BorgWarner (BW) electric torque vectoring and disconnect (eTVD) system. The requirements for the proposed concepts were defined based on the performance of the baseline eTVD and served as reference criteria throughout the development process.
A strong emphasis was placed on reducing system complexity, guided by feedback and insights from a previous thesis on the subject. Since introducing an accumulator inherently increases overall system complexity, part of the work focused on identifying opportunities to simplify the remaining system.
Performance comparisons with the baseline eTVD were conducted to evaluate the motivation for... (More) - This master’s thesis has examined the feasibility of an accumulator-based actuation method for the BorgWarner (BW) electric torque vectoring and disconnect (eTVD) system. The requirements for the proposed concepts were defined based on the performance of the baseline eTVD and served as reference criteria throughout the development process.
A strong emphasis was placed on reducing system complexity, guided by feedback and insights from a previous thesis on the subject. Since introducing an accumulator inherently increases overall system complexity, part of the work focused on identifying opportunities to simplify the remaining system.
Performance comparisons with the baseline eTVD were conducted to evaluate the motivation for implementing an accumulator-based solution. In parallel, cost and packaging factors were assessed relative to the baseline system to determine the overall feasibility of the proposed concepts. The developed solution demonstrates higher performance than the baseline.
Although the presented solution is more expensive and requires greater packaging volume, it offers the most favorable trade-off among the explored alternatives and is likely the best-case scenario achievable when introducing an accumulator. (Less) - Popular Abstract
- This thesis investigates ways to improve the system performance and methods for reducing the complexity and cost in a more complex system.
The project investigates a torque-vectoring system developed by BorgWarner, known as the eTVD, which enables controlled distribution of power between the vehicle’s wheels. Such systems improve both safety and performance by continuously adjusting torque delivery to maximize traction at the wheel with the highest grip. The eTVD system sits between the electric motor and the driveshafts.
The objective was to evaluate whether adding an energy storage component, called an accumulator, could reduce the response times while the system still remains practically feasible. The existing eTVD-system was used... (More) - This thesis investigates ways to improve the system performance and methods for reducing the complexity and cost in a more complex system.
The project investigates a torque-vectoring system developed by BorgWarner, known as the eTVD, which enables controlled distribution of power between the vehicle’s wheels. Such systems improve both safety and performance by continuously adjusting torque delivery to maximize traction at the wheel with the highest grip. The eTVD system sits between the electric motor and the driveshafts.
The objective was to evaluate whether adding an energy storage component, called an accumulator, could reduce the response times while the system still remains practically feasible. The existing eTVD-system was used as a baseline, in order to set clear and realistic performance goals for an accumulator-based solution. The baseline system was also used in order to compare other factors, such as cost and packaging space.
One of the main challenges with the accumulator-based solution was the added complexity caused by the solution. Other than the storage tank, several additional valves and advanced oil channel design is required to make the accumulator-based solution work. To address this, the project also explored ways to simplify the overall system design, by simplifying the rest of the other components.
The final solution showed improved response times for the accumulator concepts.
Although the solution increased both cost and required installation space, the work in simplifying other components led to major reduction in overall system complexity for an accumulator- based solution. The results show that an accumulator- based concept can be a feasible way to improve performance, provided that measures are taken to reduce the system complexity. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/student-papers/record/9241595
- author
- Wetterborg, Felix LU
- supervisor
-
- Damien Motte LU
- organization
- course
- MMKM10 20252
- year
- 2026
- type
- H2 - Master's Degree (Two Years)
- subject
- keywords
- Automotive, Hydraulic, Accumulator, Design Criteria, Product Development
- language
- English
- id
- 9241595
- date added to LUP
- 2026-06-22 10:17:06
- date last changed
- 2026-06-22 10:17:06
@misc{9241595,
abstract = {{This master’s thesis has examined the feasibility of an accumulator-based actuation method for the BorgWarner (BW) electric torque vectoring and disconnect (eTVD) system. The requirements for the proposed concepts were defined based on the performance of the baseline eTVD and served as reference criteria throughout the development process.
A strong emphasis was placed on reducing system complexity, guided by feedback and insights from a previous thesis on the subject. Since introducing an accumulator inherently increases overall system complexity, part of the work focused on identifying opportunities to simplify the remaining system.
Performance comparisons with the baseline eTVD were conducted to evaluate the motivation for implementing an accumulator-based solution. In parallel, cost and packaging factors were assessed relative to the baseline system to determine the overall feasibility of the proposed concepts. The developed solution demonstrates higher performance than the baseline.
Although the presented solution is more expensive and requires greater packaging volume, it offers the most favorable trade-off among the explored alternatives and is likely the best-case scenario achievable when introducing an accumulator.}},
author = {{Wetterborg, Felix}},
language = {{eng}},
note = {{Student Paper}},
title = {{Development of an accumulator actuation concept for a torque vectoring and disconnect system}},
year = {{2026}},
}