Invention Grant
- Patent Title: Friction estimation for steering maneuvers for stationary or slow-rolling automobiles
-
Application No.: US17441787Application Date: 2020-03-26
-
Publication No.: US11897479B2Publication Date: 2024-02-13
- Inventor: Craig E. Beal , Sean N. Brennan
- Applicant: The Penn State Research Foundation
- Applicant Address: US PA University Park
- Assignee: THE PENN STATE RESEARCH FOUNDATION,BUCKNELL UNIVERSITY
- Current Assignee: THE PENN STATE RESEARCH FOUNDATION,BUCKNELL UNIVERSITY
- Current Assignee Address: US PA University Park; US PA Lewisburg
- Agency: DINSMORE & SHOHL LLP
- International Application: PCT/US2020/024905 2020.03.26
- International Announcement: WO2020/198443A 2020.10.01
- Date entered country: 2021-09-22
- Main IPC: B60W40/068
- IPC: B60W40/068 ; B60W40/101 ; B60W40/13

Abstract:
A device for estimating a friction coefficient between a road surface and an automotive tire through determination of a steering torque during a steering maneuver of a slow-rolling or stationary vehicle includes a computer configured for constructing a brush model for a description of the steering torque across a contact patch between the tire and road surface. The steering torque is a torque 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 torque depends on a tire brush vertical load distribution and relative motion of tire brushes and the road surface. The device further includes sensors for measuring the wheel velocity and the steering rate and mechanism for measurements or estimation of the steering torque. The friction coefficient is estimated based on the measurements or estimation of the steering torque and the brush model.
Public/Granted literature
- US20220169256A1 FRICTION ESTIMATION FOR STEERING MANEUVERS FOR STATIONARY OR SLOW-ROLLING AUTOMOBILES Public/Granted day:2022-06-02
Information query