Method and apparatus for detecting friction coefficient of road

Details Method and apparatus for detecting friction coefficient of road Method and apparatus for detecting friction coefficient of road

1991-07-05

1994-11-15

Black, Thomas G.

Boots, shoes, and leggings

36442601, 36442401, 180140, 180142, B62D 715, G06F 1548

Patent

active

053654390

ABSTRACT:
A method for detecting a friction coefficient of the road surface includes a detection step of detecting an operating angle of the steering wheel of the vehicle, a vehicle speed and an operating pressure of the hydraulic power steering unit for the front wheels, and a calculation step of calculating the friction coefficient of the road surface on turning of the vehicle by considering relationships among a slip angle of the front wheel, the friction coefficient of the road surface and a cornering force of the front wheels. The method further includes a step of prohibiting the execution of the calculation step when the steering wheel is turned back, whereby the calculation step is executed only when the direction of the operating pressure of power steering unit is in the equiphase with the operating direction of the steering wheel. Also, a four-wheel steering system includes has a rear steering actuator for steering the rear wheels so as to increase the steering angle of the rear wheels as the friction coefficient of the road surface calculated by the above-described method decreases.

REFERENCES:
patent: 4140440 (1979-02-01), Ferris
patent: 4718514 (1988-01-01), Hirakushi
patent: 4721176 (1988-01-01), Kabasin et al.
patent: 4834205 (1989-05-01), Mizuno et al.
patent: 4836319 (1989-06-01), Haseda et al.
patent: 4848851 (1989-07-01), Kuraoka et al.
patent: 4875542 (1989-10-01), Uchida et al.
patent: 4882693 (1989-11-01), Yopp
patent: 4940103 (1990-07-01), Moniyama
patent: 4964481 (1990-10-01), Sano et al.
patent: 5075854 (1991-12-01), Imaseki et al.
patent: 5147008 (1992-09-01), Nishimore et al.

Affiliated with

Also associated with

Rating

Method and apparatus for detecting friction coefficient of road 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 apparatus for detecting friction coefficient of road , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for detecting friction coefficient of road will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1102498