Patent ID: 6302500
Filing Date: 2001-10-16
Classification: B60T

Abstract:
A device for measuring vehicle speed of a vehicle such as an automobile having a pair of front wheels and a pair of rear wheels, a power system for driving either the front pair or the rear pair of wheels, and an antilock brake system for electively applying a braking force to the pair of front wheels and the pair of rear wheels with an antilock reducibility of the braking force, the device comprising:means for detecting rotation speed of each of the front and rear pairs of wheels and generating corresponding first stage electric signals each bearing the detected rotation speed;means for filtering the first stage electric signals for removing a high frequency component therefrom and generating corresponding filtered second stage electric signals;means for processing the first and second stage electric signals so as to judge if the rotation speed of any of the first stage electric signals with regard to the driven wheels is larger than the largest of the rotation speeds of the second stage electric signals and identifying such a first stage electric signal or signals to be exceptional; andmeans for generating an electric signal indicating a vehicle speed for use in operating the antilock brake system based upon all of the second stage electric signals, excluding one or more thereof corresponding to the exceptional electric signal or signals.