This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
The Grip Evaluation and Management Device
Annotation ability available
Sector:
Language:
English
Abstract
The forces required to control a car while cornering come from 4 small contact patches between the tire and road. Maximizing the average speed through the turn is almost entirely dependent upon the lateral force developed at these four points by the tires. Historically, these forces have not been measured directly, but secondary results such as lateral acceleration have been measured as an indicator of the total lateral force on the vehicle. In addition, tire characteristics have been measured from steady state measurements collected on a Force and Moment machine.
Halliday Technologies Inc. has developed the Grip Evaluation and Management device, GEM, with which the lateral force developed by each tire mounted on a vehicle can be measured directly and recorded dynamically. The GEM device is patented in the USA and patents are pending in more than 20 other countries.
This paper describes the operation of the GEM device, and presents some of the data collected to date.
Recommended Content
| Technical Paper | Short-Long Arm Suspension System Non-Linearities and Analysis |
| Technical Paper | The Effect of Normal Force Variation on the Lateral Dynamics of Automobiles |
Citation
Halliday, D. and Grider, K., "The Grip Evaluation and Management Device," SAE Technical Paper 983030, 1998, https://doi.org/10.4271/983030.Also In
References
- Milliken Willaim F. Milliken Douglas L. Race Car Vehicle Dynamics SAE International 1995