Continental Automotive Gmbh

Robert Boschgmbh

Siemens Aktiengesellschaft

Jens Fiedler

Andreas Mayer

Thomas Schweiger

Martin Stratesteffen

Gabriel Wetzel

Albrecht Irion

Peter Dominke

Chi-Thuan Cao

Matthias Kretschmann

Jost Brachert

Helmut Wiss

Michael Schubert

Rolf Maier-Landgrebe

Karl-Josef Weiss

Herbert Lohner

Asmus Volkart

Reiner Folke

Celine Gamulescu

Rainer Marstaller

Ning Bian

Matthieu Falcucci

Andreas Zierhut

Andreas Abele

In a method for estimating the height of the center of gravity of a vehicle, a lateral acceleration is determined. Predefined first and second driving situation are detected at a first time as a function of a determined roll rate or of a determined roll angle and at a second time as a function of the roll rate or of the roll angle. In a time period delimited by the first and second times, a differential angle by which a vehicle body tilts during the time period is determined. Also determined are an angular speed: formula and an angular acceleration: formula of the vehicle tilting movement in the time period. A height of the center of gravity of the vehicle is estimated on the basis of an equation of motion as a function of the lateral acceleration, of the differential angle, of the angular speed: formula and of the angular acceleration: formula.

Method and device for estimating the height of the center of gravity of a vehicle

A friction coefficient between at least one tire of a motor vehicle and a roadway is estimated recursively. A kingpin inclination angle is detected or measured. A model determines a lateral friction value by defining a functional correlation between that value and the angle such that a non-linear course of that value relative to the angle is dependant on an initial increase of that value relative to the angle and on a recursively determined estimated value of the friction coefficient. The initial increase is defined substantially independently from the recursively determined estimated value. In addition, a measurement variable of the driving dynamics is captured. Depending on the lateral friction value, the driving dynamics model variable is determined. Furthermore, a variance between the driving dynamics measurement variable and the driving dynamics model value is determined. The recursion when acquiring the estimated value includes that the estimated value is adjusted.

Method and facility for estimating a measure of friction

In a method for operating a vehicle () having a plurality of wheels () and wheel sensors () which are associated with said wheels and whose measurement signals are representative of angular speeds of the respective wheels (), respective scaling values (SV, SV, SH, SH) are adapted when a predefined condition is met, the condition depending on the yaw rate (GR) of the vehicle and/or on the steering angle (LW) of the front/rear wheels.

Method and apparatus for operating a vehicle

An inertial measurement unit (IMU) contains three linear acceleration sensors and three rotational speed sensors. For the sensors there are desired installation directions parallel to the co-ordinate axes of a Cartesian co-ordinate system which is fixed to the vehicle. The actual installation directions of the sensors may differ from the desired installation directions owing to incorrect orientations. By comparing accelerations which are measured by the linear acceleration sensors for different attitudes of the vehicle with acceleration values which are known for these different attitudes in the Cartesian co-ordinate system which is fixed to the vehicle, the actual installation directions of the linear acceleration sensors are determined. By using a co-ordinate transformation it is then possible to convert the measured accelerations into the actual accelerations.

Method for determining and correcting incorrect orientations and offsets of the sensors of an inertial measurement unit in a land vehicle

For determination of a relative movement of a chassis and a body of a wheeled vehicle, which is movably joined to the chassis, three linear accelerations of the wheeled vehicle, which extend perpendicular to each other, respectively, as well as at least two rotational speeds of one respective rotational movement or a component of a rotational movement about a coordinate axis of the wheeled vehicle are measured (in measuring device), the at least two coordinate axes running perpendicular to each other, respectively. A momentary position of the relative movement is determined (in evaluation unit) using the three linear accelerations and the at least two rotational rates.

Determining a relative movement of a chassis and a body of a wheeled vehicle

For monitoring of a measuring device (), located in a wheeled vehicle, the measuring device () is configured so as to measure three linear accelerations (in unit) of the wheeled vehicle, which extend perpendicular to each other, respectively, as well as three rotational speeds (in unit) and one respective rotational movement or a component of a rotational movement about an axis of the wheeled vehicle, the three axes running perpendicular to each other, respectively. At least components of an orientation of the wheeled vehicle in a vehicle-external coordinate system are determined (in unit) from the three rotational speeds, and at least one of the measured linear accelerations is monitored (in unit) using at least the components of the orientation and a comparative variable (from unit).

Method and arrangement for monitoring a measuring device located in a wheeled vehicle

For determination of dynamic axle and/or wheel loads of a wheel vehicle (), wherein for said wheel vehicle (), at least two linear transversally oriented with respect to each other accelerations and three rotation rates of a rotation movement around the coordinate axis of the vehicle () or of the component of the coordinate axis are respectively measured by a measuring device (). The three coordinate axes extend transversally with respect to each other and at least one axle load and/or wheel load of the wheel vehicle () are determined by means of at least two linear accelerations and three rotation rates with the aid of evaluation device ().

Determination of dynamic axle loads and/or wheel loads of a wheel vehicle

A method and a control unit for controlling technical procedures, particularly in a motor vehicle. In the method, a control program of a computing element, particularly a microprocessor, is processed. The control program is subdivided into several tasks and each task is subdivided into several processes. The tasks are processed in a cooperative mode or in a preemptive mode. After the processing of the control program, in order to make possible a simulation as close to reality as possible, particularly an offline open loop simulation, it is proposed that the process sequence be stored during the processing of the control program. Preferably, before the processing of the control program, a unique identifier is assigned to each process, and, during the processing of the control program, only the identifier of the processed process most recently processed before the beginning of a finished task is stored.

Method and control unit for controlling technical procedures in a motor vehicle

A method and a device for reconstructing the sequence of processes of a control program executed by a computing device, in particular a microprocessor, from the contents of a first table and a second table. The control program is subdivided into a plurality of tasks, and each task has at least one process. During execution of the control program, for each completed task, an identifier for a process last executed before the start of the completed task is stored in the first table. The order of the respective completed tasks is stored in the second table. To reliably reconstruct the process sequence, the method and device involve the following. At first, from the contents of the first table and the second table, a third table is generated which contains, for each new task, the identifier for a process last executed before the start of the new task, and the complete process sequence of the control program is then reconstructed from the third table with the knowledge of the process sequence of the individual tasks.

Method and device for reconstructing the process sequence of a control program

Device and method for determining a wheel braking pressure and/or an admission pressure in a braking system in which pressure medium is introduced from a reservoir for the pressure medium having an admission pressure into a wheel brake through at least one shutoff device for inlet and/or outlet and/or passage of a pressure medium, it being possible to remove pressure medium from the wheel brake through at least one means delivering the pressure medium. In so doing, a pressure quantity representing the admission pressure is estimated, at least one operating state of at least one actuator in the braking system is detected and the wheel braking pressure is estimated as a function of the estimated admission pressure and the detected operating states.

Method and device for determining the pressure in brake systems

A system for controlling the motion of a vehicle is suggested which includes several levels. In a first level, at least one component is provided for controlling the vehicle motion which, in a further level, includes, as a refinement, a component &ldquo;propulsion and brake&rdquo;. In a third refinement level, this component is structured at least into the components &ldquo;propulsion&rdquo;and &ldquo;brake system&rdquo;.

Growing community of inventors

Thalmassing, Germany

Jens Fiedler