The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 20, 2007
Filed:
Apr. 06, 2005
Kenneth L. Oblizajek, Troy, MI (US);
Carl T. Wright, Highland, MI (US);
Shawn G. Quinn, Grand Blanc, MI (US);
John D. Sopoci, West Bloomfield, MI (US);
Gregory J. Fadler, Commerce Township, MI (US);
William C. Gregory, Milford, MI (US);
Kenneth L. Oblizajek, Troy, MI (US);
Carl T. Wright, Highland, MI (US);
Shawn G. Quinn, Grand Blanc, MI (US);
John D. Sopoci, West Bloomfield, MI (US);
Gregory J. Fadler, Commerce Township, MI (US);
William C. Gregory, Milford, MI (US);
GM Global Technology Operations, Inc., Detroit, MI (US);
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.