The task of the tyre pressure control system is to remind the driver in good time to check the tyre pressure as it decreases and to warn him in the event of a flat tyre. The RDC system therefore enhances vehicle safety and convenience for the driver. Nevertheless, decision priority and responsibility remain with the driver.
Advantages:
- Increased driving safety by early warning in the event of rapid pressure loss
- Tyre damage caused by excessive flexing in conjunction with low tyre pressure is avoided
- Deviations from set tyre pressure are monitored
- Slow pressure loss is recognized in good time
Components:
- Control unit for signal evaluation
- One receive aerial per wheelhouse
- Wheel electronics with valve
- Initialisation button
Soft warning: This operating status is characterized by a minimum tyre pressure (0.2 bar under set pressure) at which driving safety is still ensured. The driver is requested via the check control to correct the pressure.
Hard warning: Driving safety is no longer ensured, the driver is requested to check the tyres immediately.
A hard warning is active when the pressure loss drops either 0.4 bar or 16% below the set pressure value or drops below a value stored in the control unit.
Important
Initialisation must always be carried out after every tyre pressure correction. For this purpose, the initialisation button is pressed (min. 6 seconds) with the ignition switched on until the "tyre pressure set" appears in the check control. After several minutes driving time during which the system carries out wheel identification and a plausibility check, the RDC adopts this tyre pressure as the setpoint to be monitored.
Important
The following display texts can appear in the check control: Tyre pressure set, tyre monitoring inactive, check tyre pressure, tyre failure, tyre failure front right, tyre failure front left, tyre failure rear right, tyre failure rear left
The wheel electronic units are mounted within the tyres and measure the tyre pressure as well as the tyre temperature. The measured data are sent from the wheel via an output stage in the wheel electronic unit. The power is supplied by a lithium battery in the wheel electronics. Each electronic control unit features its own code which is also sent during each data transfer.
The data sent by the wheel electronic units are received via aerials mounted in the wheelhouse and transferred via shielded cables to the control unit.
As part of the wheel identification procedure, the system automatically learns what wheel electronic units belong to the vehicle. This function ensures that data from another vehicle cannot be evaluated.