The University of Toledo University Transportation Center

UTUTC-AE-4: Reducing Noise and Vibration of Hydraulic Hybrid and Plug-In Hybrid Electric Vehicles - Phase III

Focus Area: Alternate Energy


Principal Investigator:

Mohammad Elahinia
Assistant Professor
Industrial and Manufacturing Engineering Department
The University of Toledo

Project Dates: 08/01/2009 – 07/31/2010; no-cost extension to 06/30/2011

Project Award: FY2010

UT-UTC Designation: UTUTC-AE-4



Advanced vehicular technologies including hybridization have been identified as the focuses of the University of Toledo University Transportation Center (UT-UTC) in the effort to increase fuel efficiency and reduce polluting emissions. The proven advantages of the hybrid vehicles or variable cylinder management also comes with challenging problem of noise, vibration and harshness (NVH). This issue has to be properly addressed in order for the technologies to quickly enter the market or be widely applied.

The NVH in modern vehicles is not conventional since it involves multiple power sources working in different modes and the switching among them. This feature has created vibration in all forms containing shock and harmonic vibration in very wide range of frequencies and random excitations as well. It has been proven that the passive vibration isolators, e.g. elastomeric and hydraulic, are not efficient in modern vehicles. Active mounts such as the one installed in the Honda Odyssey are effective in all conditions, but they are expensive and can lead to stability problems. A great amount of research has been done and stated that the semi-active devices are preferred thanks to their effectiveness and affordability.

In the previous phases, this project has completed the analytical model and fabrication of a single-axis semi-active magnetorheological (MR) fluid mount. This mount utilizes the MR fluid functioning in two modes which are flow and squeeze mode. The modes can operate individually or simultaneously without interfering with each other. The simulation and experiments conducted on the mount have shown promising results. This proposal is about the continuation of the research to develop a suitable controller for the mount. To this end a control system will be designed and tested. The controller will have adaptive and optimal characteristics so that the mount will be able to respond quickly and efficiently in all possible conditions of the operation of the vehicle. This way the mount will provide a controlled shock and vibration isolation with minimal use of energy.

The controller will complete the semi-active MR mount design and make it ready for commercialization. The mount, together with its intelligent control, will solve the NVH problem induced by the power-generating components and speed up the commercialization process of the advanced vehicular technologies.

UT-UTC Grant Amount          $49,999  
Match Amount                     $52,728
Total Project Budget           $102,727
Final Report:
Final Report    PDF Symbol
Last Updated: 1/14/16