Continental Aktiengesellschaft

Other

Continental Aktienegesellschaft

Continental Reifen Deutschland Gmbh

Gerhard Ernst

Holger Oldenettel

Helmut Fennel

Michael Latarnik

Heinrich Huinink

Thomas Becherer

Holger Behrends

Andreas K&ouml;be

Wolfgang Klodmann

Dirk Kaschub

Zheng Yang

Petru Limbasan

Mihai Motoasca

Toma Patarau

System and method for ascertaining the emergency running condition of a pneumatic tire on a motor vehicle. The system includes at least one sensor device arranged at least on each axle. The at least one sensor device is adapted to supply a permanently present first periodic oscillation proportional to a wheel rotation speed as a speed output signal. The at least one sensor device includes one of an active and a passive magnetic field sensor being mounted to one of rotate with the tire and be stationary. The transmitter device is arranged complementary to the at least one passive and active magnetic field sensor and is adapted to produce a periodic magnetic field change in proportion to the wheel rotation speed in a detection range. At least one signal processing device is used for processing and evaluating the speed output signal. A transmission and a display device are used for at least one of the transmission and the display of the speed output signal, and for one of the transmission and the display of at least one of the output control and the warning signal. An emergency running device is arranged on the vehicle wheel.

Method and system for ascertaining the emergency running condition of a pneumatic tire

The invention relates to a method for transmitting data in a data transmission system. The invention also relates to a data transmission system which includes a receiver ( ) and at least one transmitter ( to ). The receiver ( ) is operable in a stand-by mode and in a data-receive mode and transfers with the aid of a switch-on signal from the stand-by mode into the data-receive mode. The transmitters ( to ) transfer, via a data transmission, information to the receiver ( ) as to when, after this data transmission, the next data transmission is to be expected from the corresponding transmitter ( to ). The switch-on signal is generated in the receiver ( ) shortly ahead of the time point at which the next data transmission is to be expected from the transmitters ( to ) so that the receiver ( ) transfers from the stand-by mode into the data-receive mode. The time interval at which the receiver ( ) is in the data-receive mode can therefore be minimized and therefore the energy consumption of the receiver ( ) is minimized.

Data transmission system and a method for transmitting data in said system

The invention relates to a method for monitoring the air pressure of a tire of a motor vehicle with a tire pressure control system. The invention further relates to a motor vehicle having a tire pressure control system with which the method can be carried out. The tire pressure control system includes tire pressure control devices (4a to 4d) on each of the wheels (2a to 2d), which transmit to a central unit, at regular intervals, a data transmission which contains, inter alia, the air pressure measured in the tires. The central unit generates a warning signal when the determined air pressure deviates by more than a pregiven amount from the stored air pressure. The motor vehicle contains a second tire pressure control system which operates independently of the first tire pressure control system and monitors the air pressure in the tires of the motor vehicle at least when a transmission pause, which is too long, occurs between two data transmissions of one of the tire pressure control devices (4a to 4d).

Method for monitoring the air pressure of the tires of a motor vehicle

The invention relates to a method for carrying out the allocation of tire pressure control devices ( to ) to wheel positions in a tire pressure control system of a motor vehicle. Each tire pressure control device ( to ) transmits, at certain time intervals, its individual identifier and a lengthened high frequency signal to the central unit ( ) of the tire pressure control system. The high frequency signals have an individual trace which is dependent upon the rotational angle of the wheel and on the time because of the geometry of the wheel box and as a consequence of the rotation of the wheel. In the central unit ( ), a time point is fixed from two sequential high frequency signals at which the wheel assumes the same angular position in each case with this wheel being the wheel from which the signals were transmitted. The corresponding wheel has made an integer number of revolutions between the two time points. In the central unit ( ), with the aid of the signals of the rpm sensors ( to ), the wheel position is determined in which the wheel has made an integer number of revolutions between the two time points. The corresponding wheel position is allocated to the individual identifier transmitted from the tire pressure control device ( to ).

Method for allocating tire pressure control devices to wheel positions in a tire pressure control system of a motor vehicle

The invention relates to a method for determining the rotational speed of a motor vehicle wheel (,), which rotates about a rotational axis (,), by an acceleration sensor (,). The acceleration sensor (,) is mounted on the motor vehicle wheel (,) at a spacing (r) to the rotational axis (,) in such a manner that the force-sensitive axis of the acceleration sensor (,) is perpendicular to the rotational axis and is perpendicular to the centrifugal force which acts on the acceleration sensor (,) with a rotation of the motor vehicle wheel (,) about the rotational axis (,). The rotational speed of the motor vehicle wheel (,) is measured in that the rotational axis (,) is aligned horizontally so that a periodic measurement signal is generated in the acceleration sensor (,) by the gravitational force. The frequency of the measurement signal corresponds to the rotational speed of the motor vehicle wheel (,) about the rotational axis (,). The invention also relates to an air pressure control system in which the rotational speed of the motor vehicle wheel is measured.

Method for determining the rotational speed of a motor vehicle wheel rotating around a rotating axis

The invention is directed to a method for allocating the wheel positions to air pressure control devices (6a to 6d) in an air pressure control system and is directed to an air pressure control system for carrying out the method. First measuring devices are provided which are permanently allocated to air pressure control devices 6a to 6d, and a second set of measuring devices 4a to 4d is provided which are permanently assigned to the wheel positions of the motor vehicle. The first measuring devices and the second measuring devices measure a same measurement value. The measurement values measured by the first measuring devices 16a to 16d and the measurement values measured by the second measuring devices 4a to 4d are transmitted to a central unit 10. In addition, the air pressure control devices each transmit an individual identifier to the central unit 10. The central unit 10 then allocates each air pressure control device to a wheel position at which the measurement value from a first measuring device 16a to 16d is sufficiently close to that measured by a second measuring device 4a to 4d.

Air pressure control system

Growing community of inventors

Hannover, Germany

Gerhard Ernst