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:
Dec. 30, 2008
Filed:
Aug. 18, 2004
Roger Rouphael, L'Union, FR;
Benoit Hamm, Guignicourt sur Verce, FR;
Roger Rouphael, L'Union, FR;
Benoit Hamm, Guignicourt sur Verce, FR;
Continental Automotive France, Toulouse, FR;
Abstract
The invention relates to a method for determining the speed of a vehicle with the aid of sensors on board said vehicle, whereby the vehicle is moved by an engine () coupled to a gear box (), wherein the speed is determined by multiplying the value of the engine rpm obtained by a sensor by a predetermined coefficient as a function of the engaged gearbox ratio. The engaged gearbox ratio is determined during a change in gearbox ratio by dividing the values of the engine rpm measured just before and after the ratio change by each another and by comparing the result of said division with predetermined stored values which are dependent upon the gear box () with which the vehicle is fitted. The invention can be used to determine the speed of a vehicle in a degraded mode i.e. in the event of a speed sensor failure.