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Reifendruck-Kontrollsystem

Tire pressure monitoring system

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1 Description of the system

The tire pressure monitoring system is applied for the permanent control of the tire pressure during

driving and also during standstill periods.

An electronic system which is installed in the interior of the tire measures the tire pressure and the

temperature in regular intervals and transmits information to a central control unit by means of a high

frequency transmission line. The control unit evaluates the incoming data and transmits the information

to the driver, if required. In the case of a puncture, the driver is given a warning, and he is also informed

when the tire pressure should be corrected.

2 System components

The tire pressure control system consists of the following components:

• or 5 aluminium valves

• 4 or 5 electronic units in the wheels (sensor and high-frequency sending unit)

• 4 or 5 receiving antennas

• a special connecting cable appropriate for high-frequency transmission, between the receiving

antennas and the control unit

• a control unit (high-frequency receiver and evaluation system)

•

option: keying device for entering a default pressure

Figure 1: components of the tire pressure monitoring system

At present, an individual output unit is not available, since the output of the messages to the driver is

done via the driver information system belonging to the standard equipment.

Summary of content (4 pages)

PAGE 1
Reifendruck-Kontrollsystem Tire pressure monitoring system 1 Description of the system The tire pressure monitoring system is applied for the permanent control of the tire pressure during driving and also during standstill periods. An electronic system which is installed in the interior of the tire measures the tire pressure and the temperature in regular intervals and transmits information to a central control unit by means of a high frequency transmission line.
PAGE 2
Reifendruck-Kontrollsystem Tire pressure monitoring system Figure 2: schematic representation of the system´s layout in a vehicle 2.1 Electronic wheel unit The battery-based electronic wheel units are mounted inside the tires to measure the tire pressure and the temperature of the electronic wheel systems. Every electronic wheel unit has an individual code (ID), which is transmitted with every message. Furthermore, the data telegram includes information about the remaining service life of the battery.
PAGE 3
Reifendruck-Kontrollsystem Tire pressure monitoring system Abbildung 3: components of the tire pressure monitoring system The electronic wheel unit is combined with the aluminium valve to form a compact unit which is bolted to the standardized valve bore of the rim. Its design allows mounting in almost every known rim type. The electronic wheel unit includes an intelligent integrated sensor which is mounted on a circuit carrier and has been developed especially for this application.
PAGE 4
Reifendruck-Kontrollsystem Tire pressure monitoring system 4 FCC Requirements Section 15.19: Labeling requirements This device complies with Part15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Section 15.