Investigation of energy-efficient MRF-based clutches for hybrid powertrains

Christian Hegger; Jürgen Maas

doi:10.1117/12.2219689

15 April 2016 Investigation of energy-efficient MRF-based clutches for hybrid powertrains

Christian Hegger, Jürgen Maas

Proceedings Volume 9799, Active and Passive Smart Structures and Integrated Systems 2016; 97992W (2016) https://doi.org/10.1117/12.2219689
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2016, Las Vegas, Nevada, United States

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.

Citation Download Citation

Christian Hegger and Jürgen Maas "Investigation of energy-efficient MRF-based clutches for hybrid powertrains", Proc. SPIE 9799, Active and Passive Smart Structures and Integrated Systems 2016, 97992W (15 April 2016); https://doi.org/10.1117/12.2219689

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