ROAD SURFACE FRICTION AND SURFACE TYPE ESTIMATION SYSTEM AND METHOD

摘要

A tire-based system and method for estimating road surface friction includes a model-based longitudinal stiffness estimation generator using tire-based parameter inputs and vehicle-based parameter inputs; an actual longitudinal stiffness estimation generator using real-time vehicle-based parameter inputs; and a tire road friction estimation generator for deriving a tire road friction estimation from a comparative analysis between the actual longitudinal stiffness estimation and the model-based longitudinal stiffness estimation. A road surface classifier algorithm is employed to generate a road surface type analysis from the road friction estimation, an ambient air temperature measurement, and an ambient air moisture measurement.

主权项

1. A tire-based system for estimating road surface friction comprising:
at least one tire mounted to a wheel hub and supporting a vehicle; model-based longitudinal stiffness estimating means for producing a model-based longitudinal stiffness estimation for the one tire from tire-based inputs and vehicle-based inputs; actual longitudinal stiffness estimating means for producing an actual longitudinal stiffness estimation from vehicle-based inputs; tire road friction estimating means for deriving a road friction estimation from a comparative analysis between the actual longitudinal stiffness estimation and the model-based longitudinal stiffness estimation.