Methods for evaluating dynamic characteristics of vehicle dampers at low velocities
US7299117B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 6, 2005 |
| Grant date | Nov 20, 2007 |
| Priority date | — |
| Expiry date | May 19, 2026 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60G2500/10
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The ability of a damper to attenuate smooth road shake in a vehicle is tested using a test fixture that is controlled by inputting data for periodic low amplitude periodic excitations having a selected frequency range, selected amplitude range and a selected dither representative of vehicle operation on relatively smooth roads. The selected frequency range is about 5 Hz to 30 Hz and the selected amplitude range is about 0.05 mm to 2.00 mm. A preferred frequency is about 15 Hz which is applied preferably for about 200 cycles in a series of separate tests at individual amplitudes of, for example, 0.05, 0.10, 0.15, 0.20, 0.25, 0.50, 1.00 and 2.00 mm. The damper is tested to produce low amplitude test results comprising displacement, force and velocity parameters, measured as functions of time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.