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:
Feb. 24, 1998
Filed:
Aug. 19, 1996
James Werstler Siekkinen, Carmel, IN (US);
Roger Alan Jendrusina, Milford, MI (US);
Delco Electronics Corporation, Kokomo, IN (US);
Abstract
Relative speeds of wheels are measured in different speed ranges when tires are properly inflated to learn offsets due to parameters not related to pressure. The offsets are used during leak monitoring to detect a wheel speed pattern which is abnormal due to pressure drops. During learning periods, monitoring for large pressure drops only is permitted using preliminary offset values. When learning is complete in a given speed range high sensitivity monitoring is invoked. Special sensitivity of large pressure drops shortly after vehicle start up allows a brief period of flat detection. A plurality of leak events for a given wheel are accumulated to signal a warning, with large pressure drops accumulating faster than small drops for progressive sensitivity and greater robustness.