Continental Automotive Gmbh

Continental Automotive France

Continental Automotive Technologies Gmbh

Matthias Kretschmann

Parthiv Dharamshi

Zheng-Yu Jiang

Jean-Philippe Boisset

Thomas Haas

Michael Löffler

Herbert Preis

Jens Daniel Schlachter

Shichao You

Frank Fischer

Nicolas Guinart

Takeaki Yajima

Jens Fiedler

Sébastien Plancke

Holger Faisst

Thomas Schweiger

Martin Stratesteffen

Christoph Resch

Andreas Abele

Nikita Trushkin

Andrei-Stefan Cimponeriu

Alexander Kuerzl

Florian Hubert Limbrunner

Jürgen Spotka

Felix Hirner

Michael LÖFFLER

A method and a device for determining loads on vehicle's wheels, each with a tire, is disclosed. A deformation measured value and a pressure measured value for each tire, and at least one acceleration measured value for the vehicle are detected. For the respective wheels, dynamic wheel loads are calculated according to a first model and static wheel loads are calculated according to a second model. The second model comprises at least one model parameter calculated by statistical analysis of the calculated dynamic wheel loads, the calculated static wheel loads, and the detected at least one acceleration measured value. The at least one acceleration measured value is redetected and the dynamic wheel loads are recalculated from the previously calculated static wheel loads and the at least one detected acceleration measured value according to the second model using the previously calculated at least one model parameter of the second model.

Method and device for determining wheel loads on wheels of a vehicle

A method for determining a tread depth of a tread of a tire during operation of a vehicle having the tire, a control device for a vehicle for determining a tread depth of a tread of a tire of the vehicle, and a system for a vehicle having such a control device and at least one electronic wheel unit, are provided. Provision is made to determine the tread depth based on a determined instantaneous dynamic wheel radius of a wheel, having the tire, of the vehicle and a determined instantaneous dynamic inside radius of the tire. In addition, at least one further first operating parameter of the tire, selected from the group including an instantaneous roadway gradient, an instantaneous vehicle drive mode and an instantaneous tire material expansion, is determined and taken into consideration.

Method, control device, and system for determining a profile depth of a profile of a tire

A method for determining a wet road condition includes receiving a value of a received signal strength index of an RF signal received from a sensor associated with a wheel of a vehicle, comparing the value to a predetermined threshold value, and if the value is less than the predetermined threshold value, determining that a wet road condition is met and outputting a pre-aquaplaning warning signal. A system for determining a wet road condition and a non-transitory computer program product are also provided.

System and method for determining a wet road condition

The disclosure relates to a method for monitoring behavior of a tire of a vehicle in a rolling condition of the tire, comprising the steps of: acquiring a signal representative of an acceleration of a specified point of the tire, deriving from the signal a curve which represents a profile of the acceleration of the point during a revolution of the tire, determining a leading portion and a trailing portion of the curve, corresponding to an entry of the point into a footprint region of the tire and corresponding to an exit of the point from the footprint region of the tire, respectively, determining a first measure of a volatility of the signal in the leading portion and a second measure of a volatility of the signal in the trailing portion, and determining an indication of the behavior of the tire based on the first measure and the second measure.

Method and device for monitoring a behavior of a tire of a vehicle

A method for detecting wheel units mounted at wheels of a vehicle and for detecting wheel mounting positions belonging to each of the wheel units is disclosed. The method comprises the steps of: positioning a mobile communication device at a predetermined start position with respect to the vehicle, moving the mobile communication device from the start position along a path around the vehicle, receiving RF signals from the wheel units and measuring the RF signal strengths thereof by the mobile communication device when moving along the path around the vehicle, performing an analysis of variations of the measured RF signal strengths of the received RF signals depending on the position of the mobile communication device along the path, identifying the wheel units and identifying the wheel mounting positions based on a result of the analysis.

Method for detecting wheel units of a vehicle and wheel mounting positions belonging to the wheel units, and a wheel information system

A method for determining a tread depth of a tread of a tire during operation of a vehicle comprising the tire, a controller for a vehicle for determining a tread depth of a tread of a tire of the vehicle, and a system for a vehicle, comprising such a controller and at least one electronic wheel unit, wherein there is provision to determine the tread depth based on a determined instantaneous dynamic wheel radius of a wheel, comprising the tire, of the vehicle and a determined instantaneous dynamic inside radius of the tire are disclosed. To improve the accuracy of determination of the tread depth a correction variable predetermined for the type of tire is taken into consideration, which correction variable characterizes the relationship between a change in the tread depth, and a change resulting therefrom in the difference between the dynamic wheel radius and the dynamic inside radius.

Method, control device, and system for determining a profile depth of a profile of a tyre

A method for determining the thickness of a tire of a motor vehicle being equipped with at least a tire pressure monitoring sensor placed in contact with the internal wall of the tire facing the tread, including the following steps: at least two successive reference times are determined; at least one instant of passage of a half-deflection angle is determined; the half-deflection angle is determined; then the value of a mean external radius, which radius is estimated in a range of angular positions, is determined; a value of a mean internal radius, which radius is estimated in a range of angular positions, is determined; then the thickness of the tire being the difference between the mean external radius and the mean internal radius.

Method for determining the thickness of a motor vehicle tire

Thread depth ascertainment for vehicle tires involves a plurality of vehicles transmitting respective adaptation data to a central data processor. The data processing device forming optimization data on the basis thereof and transmitting the optimization data to the vehicles. The adaptation data are formed by the vehicles based on tire type, mileage and rotation speed of the tire and a velocity of the vehicle and at least one operating parameter of the tire, and the optimization data are used by each of the vehicles for ascertaining the tread depth of a relevant tire based on model of the ascertained tire type, wherein the model supplies the tread depth based on the rotation speed of the tire, the velocity of the vehicle and at least one operating parameter of the tire using at least one model parameter, which is determined based on the optimization data received from the central data processor.

Method, control device and system for ascertaining tread depths of tires on vehicles

A method for determining a wheel load acting on a vehicle wheel having a rim, a tire mounted on the rim and a sensor unit mounted at the wheel, includes determining a tire pressure of the tire using the sensor unit, determining a tire footprint of the tire using the sensor unit when the vehicle is driving, determining the wheel load based on a predetermined relationship between the wheel load, the tire pressure and the tire footprint, analyzing temporal variations of the tire pressure during a standstill of the vehicle for determining one or more parameters indicating temporal variations of the tire pressure. A change of the wheel load during the standstill is estimated based on the determined parameters. A device for determining a wheel load and a method and a device for determining a weight of a vehicle are also provided.

Method and device for determining a wheel load acting on a wheel of a vehicle, and method and device for determining a weight of a vehicle

An aspect of the invention relates to a method for the radio-oriented optimization of wheel monitoring in a vehicle equipped with vehicle wheels, wherein the monitoring of at least one of the vehicle wheels is prompted by an electronic wheel unit arranged on the relevant vehicle wheel capturing at least one wheel operating parameter of the vehicle wheel, and radio signals containing information about the at least one captured wheel operating parameter being transmitted for a respective wheel rotational position of the vehicle wheel, stipulated by the electronic wheel unit, wherein the radio signals are received and evaluated by a control device of the vehicle and wherein the radio-oriented optimization of the wheel monitoring is prompted by the electronic wheel unit being used to transmit multiple radio signals for different wheel rotational positions, wherein the radio signals are received by means of the control device and rated in respect of their respective radio signal strength, wherein the control device is used to transmit an optimization radio signal to the electronic wheel unit, wherein the optimization radio signal contains optimization information formed on the basis of the rating of the radio signals, and wherein the electronic wheel unit is used to receive the optimization radio signal, and the optimization information contained therein is taken into consideration for the stipulation of the wheel rotational position of the vehicle wheel for radio signals that are to be transmitted subsequently.

Method for wireless optimization of wheel monitoring in a vehicle, a wheel monitoring system of a vehicle, and electronic wheel unit and control device for a wheel monitoring system

A system for determining a tire contact area parameter includes a sensor module on the tire. The sensor module has a sensor that receives a sensor signal which is dependent on a mechanical tire load at a predetermined measuring point on the tire. A first evaluation device evaluates the sensor signal and provides data based on the sensor signal. The data contain a data element which indicates a time point in the sensor signal. The time point characterizes a passage of the measuring point through the tire contact area. A second evaluation device calculates the tire contact area parameter by evaluating the data provided by the first evaluation device. The first evaluation device analyzes the sensor signal based on a predetermined evaluation criterion with respect to the signal quality of the sensor signal to provide signal quality information of the sensor signal.

System and method for determining at least one tire contact area parameter characterizing a dimension of a tire contact area on a tire of a wheel of a vehicle

A device and a method for determining an absolute angular position of a wheel of a vehicle. A wheel unit is mounted on the wheel side and configured to determine data which permit a reference limb of the wheel, and to wirelessly transmit the acquired data. A receiver unit is mounted on the vehicle side and receives the data of the wheel unit. A reference limb-determining device determines the reference limb of the wheel on the basis of the received data. A measuring device generates, in each case, one signal when the wheel rotates by a previously determined angle, and a counting device counts the signals generated by the measuring device. An angle-determining device determines an absolute angular position of the wheel on the basis of the signals counted by the counting device, and on the basis of the specific reference limb.

Device and method for determining an absolute angular position of a wheel of a vehicle

A method for determining a tire tread depth during operation of a vehicle includes determining an instantaneous rotational speed of a vehicle wheel having the tire based on data determined by at least one first sensor, then determining a vehicle speed based on data determined by at least one different second sensor, then determining an instantaneous dynamic wheel radius based on the determined instantaneous rotational speed and the determined instantaneous speed. At least one first tire parameter selected from an instantaneous tire temperature, tire pressure and tire load is determined. An instantaneous dynamic inner wheel radius is determined based on the at least one determined first parameter, wherein the inner wheel radius is the distance between the center of the wheel and the tire-side start or seam of the tread. A tire tread depth is determined based on the determined instantaneous dynamic radius and the determined instantaneous dynamic inner radius.

Method, control device and system for determining a tread depth of a tread of a tire

A method and a device estimate a profile depth of a tire of a vehicle during operation of the vehicle. The method measures signals from a piezoelectric element which is disposed on an inner side of the tire in a region which deforms in the event of tread shuffle. The measured signals or actual data derived from the signals are compared with comparison data. The comparison data contain data sets which each indicate signals to be expected for a profile depth or actual data which are to be expected. The profile depth is then estimated on the basis of the comparison of the signals or of the actual data with the comparison data.

Method and device for estimating a profile depth of a tire

A method of operating a tire pressure monitoring system for a motor vehicle includes detection of a stationary state of the motor vehicle by way of a centrifugal force measured on the wheel side or a vehicle speed measured on the vehicle side, during a time period during which the vehicle speed is zero; detection and vehicle-side storage of an acceleration force in each wheel during the time period, and renewed detection of an acceleration force in each wheel at the end of the time period. The detected acceleration force in each wheel is transmitted to a vehicle-side control device and compared with earlier-stored acceleration forces associated with the respective wheel position. The tire pressure system is initialized following the stationary state of the motor vehicle in the event of a deviation in any of the wheels. There is also provided a tire pressure monitoring system and a motor vehicle.

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Wuppertal, Germany

Matthias Kretschmann