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Proceedings Paper

Investigation of energy-efficient MRF-based clutches for hybrid powertrains
Author(s): Christian Hegger; Jürgen Maas
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Paper Abstract

The requirements for transmission and coupling elements in hybrid powertrains are rising continuously. On this occasion a novel clutch-design is investigated and validated in this contribution. The transmission of power is based on magnetorheological fluids (MRF) including a fluid movement control for enabling a drag torque-free operation for an increased energy efficient operation. Drag losses in powertrains are a serious deficiency for an energy-efficient application. MRFs are highly qualified for the utilization in powertrains considering their particular characteristics of changing their apparent viscosity significantly under influence of a magnetic field by fast switching times and a smooth torque control. The proposed MRF-clutch with three different variations of the fluid movement control is designed based on a numerical model and validated by experimental measurements with a realized prototype. The main aspects during the investigation are focused on the coupling functions under the influence of high rotational speeds up to 6000 min-1 and also the safety behavior of the different variations by the fluid control in case of a system failure. The theoretical and experimental investigation demonstrates the suitability for an integration of clutches based on MRF in electrical or hybrid powertrains as an alternative to conventional coupling elements.

Paper Details

Date Published: 15 April 2016
PDF: 10 pages
Proc. SPIE 9799, Active and Passive Smart Structures and Integrated Systems 2016, 97992W (15 April 2016); doi: 10.1117/12.2219689
Show Author Affiliations
Christian Hegger, Ostwestfalen-Lippe Univ. of Applied Sciences (Germany)
Jürgen Maas, Ostwestfalen-Lippe Univ. of Applied Sciences (Germany)

Published in SPIE Proceedings Vol. 9799:
Active and Passive Smart Structures and Integrated Systems 2016
Gyuhae Park, Editor(s)

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