Fluid-pressure and analogous brake systems – Speed-controlled – And traction control
Patent
1994-09-09
1996-12-24
Graham, Matthew C.
Fluid-pressure and analogous brake systems
Speed-controlled
And traction control
303190, B60J 800
Patent
active
055868150
ABSTRACT:
A method and system for detecting an incorrect indication of front-rear locked four-wheel drive operation of a vehicle capable of both front-rear locked four-wheel drive and unlocked two-wheel drive. The relative speed difference, defined as the absolute value of the difference between the rear wheel velocity and the arithmetic average of the front wheel velocities divided by the vehicle reference speed, is measured repeatedly. A count of measured relative speed differences greater than a relative speed threshold is calculated. The incorrect indication is detected when the count exceeds a rejection threshold. The relative speed threshold is predetermined based on histograms of relative speed data for two-wheel drive and four-wheel drive modes of operation. Once an incorrect indication is detected, modifications are made to the antilock brake system control algorithm.
REFERENCES:
patent: 4589511 (1986-05-01), Leiber
patent: 4702337 (1987-10-01), Burckhardt et al.
patent: 4753312 (1988-06-01), Burgdorf et al.
patent: 4759590 (1988-07-01), Uchida et al.
patent: 5170343 (1992-12-01), Matsuda
patent: 5197566 (1993-03-01), Watanabe et al.
Graham Matthew C.
Kelsey-Hayes Company
LandOfFree
Method and system for detecting false four-wheel drive indicatio does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and system for detecting false four-wheel drive indicatio, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and system for detecting false four-wheel drive indicatio will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1174955