Full Content is available to subscribers

Subscribe/Learn More  >

Analysis and Optimization of an Electrohydraulic Power Pack for Use in a Fully-Active Vehicle Suspension Through the Use of Computational Fluid Dynamics

[+] Author Affiliations
Colin O’Shea

Levant Power Corp., Woburn, MA

Yanjun Xia, Sam Lowry

Simerics Inc., Huntsville, AL

Paper No. FPMC2013-4402, pp. V001T01A002; 11 pages
  • ASME/BATH 2013 Symposium on Fluid Power and Motion Control
  • ASME/BATH 2013 Symposium on Fluid Power and Motion Control
  • Sarasota, Florida, USA, October 6–9, 2013
  • Conference Sponsors: Fluid Power Systems and Technology Division
  • ISBN: 978-0-7918-5608-6
  • Copyright © 2013 by ASME


Shock absorbers are essential to vehicle comfort and handling. Most shock absorbers use passive or “semi-active” valves to produce reactive force with limited ride benefits while dissipating hydraulic power as heat. Fully-active suspensions can fundamentally eliminate the discomfort of bumps and provide superior handling and safety. Existing active suspensions consume large amounts of power and are expensive and unwieldy. If these challenges are addressed, fully-active suspensions could revolutionize the ride control industry.

A compact and full-active suspension system, GenShock, is being developed by Levant Power. The patented system relies upon an electrohydraulic power pack coupled with a gerotor motor/pump. Energy consumption is minimized by regenerative harvesting from suspension dynamics. The system is based around a proprietary electrohydraulic motor/pump mechanism that can both semi-actively damp body and wheel motion while recovering energy, and actuate to drive the wheel and chassis.

This article describes the use of computational fluid dynamics (CFD) in the development and optimization of hydraulic components in GenShock. The CFD software PumpLinx enabled the complex non-linear GenShock system to be simulated within 5% of experimental tests, and enabled a threefold increase in system efficiency. Parametric simulations predict the torque, power, leakage behavior, and hydrodynamics of the system including effects of aeration and cavitation. Detailed analysis and correlations between experimental data and simulations are presented.

Copyright © 2013 by ASME



Interactive Graphics


Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In