US 10,703,406 B2 · Method and system for determining road properties in a vehicle

Abstract

A method in a vehicle for determining road properties is described. The method includes: acquiring vehicle acceleration in x, y and z directions; acquiring a rack force; acquiring a wheel speed for each of all four wheels; determining a wheel speed energy based on the wheel speed; determining a wheel slip of all four wheels of the vehicle based on a respective wheel speed of the wheel; determining an acceleration energy in each of the x, y and z-directions based on the vehicle acceleration and the vehicle speed; determining a rack force energy based on the detected rack force; and determining road properties based on the wheel speed energy, rack force energy and vehicle speed. A system is also described for performing the method.

Claims16

Dependent claims

A method in a vehicle for determining road properties, the method comprising:

detecting vehicle acceleration in x, y and z directions;
detecting a rack force;
detecting a wheel speed for each of all four wheels of the vehicle;
determining a wheel speed energy for each wheel based on the respective wheel speed of the wheel;
determining a wheel slip for each wheel based on the respective wheel speed of the wheel;
determining an acceleration energy in each of the x, y and z-directions based on the respective vehicle acceleration;
determining a vehicle speed;
determining a rack force energy based on the detected rack force;
and
determining road properties based on wheel speed energy, wheel slip, acceleration energy, vehicle speed and rack force energy.

7 more elements

Dependencies are inferred from the claim text.

Method and system for determining road properties in a vehicle

Life of this patent

Method and system for determining road properties in a vehicle

Life of this patent

Abstract

Claims16