Magnetorheological Fluid-Based Continuously Variable Transmission

Award Information
Agency:
Department of Defense
Branch
Army
Amount:
$119,885.00
Award Year:
2001
Program:
SBIR
Phase:
Phase I
Contract:
DAAD17-01-C-0012
Award Id:
52849
Agency Tracking Number:
A002-2129
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
161 First Street, Cambridge, MA, 02142
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
157257502
Principal Investigator:
James Goldie
Program Manager
(617) 349-0821
goldie@satc.com
Business Contact:
L. Lesster
General Manager
(617) 349-0927
lesster@satc.com
Research Institution:
n/a
Abstract
A continuously variable transmission (CVT) is proposed that utilizes magnetorheological (MR) fluids. Using a typical MR fluid with a saturation yield stress of 70 kPa at 1600 Oe, it appears feasible to design a 60 hp CVT within the desired volumetricfootprint: 3-inch axial length and 10-inch diameter. Initially, the Phase I will investigate the tradeoffs between the various possible approaches for the MR fluid-based CVT, in order to select the most promising concept. The effort will then proceed todevelopment of an optimum design for the selected concept. The design effort will address issues such as production and shaping of the activating magnetic field, viscous losses in non-activated regions of the MR fluid, overall efficiency, stresses incritical elements, and sealing of the MR fluid. We will conclude the program with testing on a representative small-scale prototype that incorporates the critical features and addresses the risks of the proposed MR fluid CVT.A compact, efficientcontinuously variable transmission (CVT) with high rpm capability offers improved fuel economy, reduced vehicle weight, reduced engine torque/speed demands, and reduced vehicle emissions. Such a CVT will also benefit products and equipment where there isvariable-speed mechanical power transmission.

* information listed above is at the time of submission.

Agency Micro-sites


SBA logo

Department of Agriculture logo

Department of Commerce logo

Department of Defense logo

Department of Education logo

Department of Energy logo

Department of Health and Human Services logo

Department of Homeland Security logo

Department of Transportation logo

Enviromental Protection Agency logo

National Aeronautics and Space Administration logo

National Science Foundation logo
US Flag An Official Website of the United States Government