Apparatus for estimating road friction coefficient

摘要

A friction coefficient on road is estimated for vehicles. An actual vehicle of a specific vehicle operating parameter is calculated. A first reference value of the vehicle operating parameter on a road with a large friction coefficient is calculated based on vehicle operating model for the road with the large friction coefficient. A second reference value of the vehicle operating parameter on a road with a small friction coefficient is calculated based on vehicle operating model for the road with the small friction coefficient. A friction coefficient on road is estimated based on the relationship between the actual value and the first and the second reference values.