Volkswagen Ag

Audi Ag

Tttech Computertechnik Ag

Thomas Bizenberger

Thomas Ruchatz

Peter Andreas

Heiko Rabba

Bernhard Gstoettenbauer

Winfried Schultalbers

Hanno Jelden

Wolfgang Baeker

Bernhard Gstöttenbauer

Sven Schachtner

A method transmits a message between a transmitter and a receiver on a bus using an identifier associated with the transmitter/receiver path for the purpose of authentication and a message counter. The identifier is dynamically selected from an identification sequence depending on the message counter value and is integrated into the message check sum but not transmitted via the bus. A control device and a vehicle are adapted to carry out the method for transmitting a message.

Prevention of masquerade by using identification sequences

A method is for regulating the speed of an automobile and the distance of the automobile from at least one automobile driving in front during a docking process, the driving speed of the automobile being greater than that of the automobile in front. According to the method, a detection device with a distance sensor is used to determine at least the speed of the automobile, the relative speed and the distance from the automobile in front, and the value of a normal acceleration for a braking operation of the vehicle is calculated according to the difference between a predetermined normal desired following distance and the distance and the relative speed. The technical problem of further improving the functioning of a method of this type and the corresponding device and ensuring comfortable driving behavior during the docking process between the two automobiles is solved by calculating the value for a limit acceleration for a braking operation of the automobile according to the difference between a predetermined limit desired following distance and the distance and the relative speed, by determining the greater of the two values for the normal acceleration and the limit acceleration in terms of amount, as the braking acceleration to be applied, and braking the automobile with the braking acceleration. A device for performing the method includes two proportionality regulators for calculating the normal acceleration and the limit acceleration.

Method and device for regulating a docking process between two automobiles

A method for controlling the speed of a motor vehicle and the distance of a motor vehicle to at least one motor vehicle driving ahead includes the steps of: inputting a setpoint trailing distance to the motor vehicle driving ahead; determining, in accordance with at least one detector, at least the speed of the motor vehicle, the distance, and the speed relative to the motor vehicle driving ahead; decelerating or accelerating the motor vehicle in response to the detected distance deviating from the setpoint trailing distance; calculating, in response to the motor vehicle driving ahead being lost from the detection range of the detector (target loss), the speed of the motor vehicle driving ahead from the relative speed determined prior to losing the target; and calculating the actual distance from the driving speed of the motor vehicle. Thus, the speed of the motor vehicle driving ahead is derived from the measured values measured prior to the time of losing the target, and, in accordance with a differential time unit, the distance is extrapolated from the driven speed of the motor vehicle and the speed of the motor vehicle driving ahead.

Method for controlling the speed and distance of a motor vehicle

For continuous and accurate monitoring of the conversion rate of an exhaust catalyst during operation of an internal combustion engine, temperature values are determined at two measuring points upstream and downstream of the catalyst in the direction of exhaust gas flow. In order to obtain an evaluatable signal difference at all times, at least one of the measured exhaust gas temperature values is filtered so that the temperature value obtained assures a reliable temperature difference with respect to the other temperature value at all times. The actual temperature difference value obtained in this way is compared with a desired temperature difference value generated by a three-dimensional desired value characteristic map and is checked with the aid of a plausibility check.

Process for monitoring the conversion rate of an exhaust catalyst

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Braunschweig, Germany

Thomas Bizenberger