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:
Sep. 22, 1998
Filed:
Jul. 17, 1996
Tomoyuki Hara, Kanagawa-ken, JP;
Toshiharu Takasaki, Kanagawa-ken, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
A wheel tachometer minimizes variances in the rate of revolution detected by the wheel velocity sensors of the tachometer due to assembling errors and improves the accuracy of the operation of driving force allocation. Sinusoidal wheel velocity signals vF and vR representing the rates of revolution of the front and rear wheels are produced respectively by front and rear wheel revolution sensors are subjected to wave shaping to obtain the rate of revolution of the front wheels nF and that of the rear wheels nR. When the rate of revolution of the front wheels nF and that of the rear wheels nR exceeds an initial threshold value V.sub.THMIN, the greater one of the rates of revolution nF and nR is used to update the threshold value V.sub.TH. Thereafter, the detected rates of revolution nF and nR are used for the wheel velocities of the front and rear wheels V.sub.F and V.sub.R when they exceed the threshold value V.sub.TH and zero is used for the wheel velocities of the front and rear wheels V.sub.F and V.sub.R when they are lower than the threshold value V.sub.TH.