Patent ID: 11897479
Assignee: BUCKNELL UNIVERSITY
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 13:
14. A method of estimating a friction coefficient between a tire and a road surface for a slow-rolling or stationary automotive, the method comprising:
providing a brush model for a description of a steering moment across a contact patch between the automotive tire and road surface, the steering moment being a moment acting on a steering axis required to overcome resistance to tire twisting on the road surface at a wheel velocity and a steering rate, the steering moment depending on a vertical load distribution and relative motion of tire brushes on the tire and the road surface;
measuring the wheel velocity and the steering rate;
providing measurements or estimation of the steering moment; and
estimating the friction coefficient based on the measurements or estimation of the steering moment and the brush model;
wherein the wheel velocity is not greater than a predetermined value.