Patent · US Active

Method for determining the conditions of an underlying surface during unbraked or braked travel of a vehicle

US9694795B2 · kind B2 · utility

0Cited by

4References

16Claims

0Family size

Assignee

Continental Teves AG & Co. OHG · DE

Inventors

Henning Kerber · Darmstadt, DE
Mario Roszyk · Usingen, DE
Dieter Burkhard · Pirmasens, DE

Key dates

Filing date	Apr 14, 2014
Grant date	Jul 4, 2017
Priority date	—
Expiry date	Sep 22, 2034

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB60T2210/14
WIPO fieldTransport
WIPO sectorMechanical engineering

Abstract

A method for determining the conditions of an underlying surface during unbraked or braked travel of a vehicle by a wheel-specific characteristic variable which is derived from a change over time in the wheel speed detected at at least one vehicle wheel. According to invention there is provision that a) a jolt signal is formed by double differentiation of the wheel speed, b) in order to form the characteristic variable the difference between the absolute value of the jolt signal and a tolerance value is summed or integrated over time, and c) the condition of the underlying surface is determined by comparing the characteristic variable with an oscillation signal threshold value.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.