Arrangement with a switch, mounted on the wheel of a motor vehicle, for monitoring the internal pressure of a tyre

摘要

The invention relates to an arrangement with one or more switches which are mounted on the wheel of a motor vehicle and each respond, that is to say open or close, whenever there is a change of state, that is to say during the transition to an excessively high temperature or to an excessively low or excessively high pressure in the interior of the tyre. The switch or switches are components of an oscillatory circuit with a coil which is also mounted on the wheel and is excited, by means of a coil seated on the chassis, to resonate in the kilohertz range (1 to 100 kHz) with oscillations whose harmonics are transmitted back via the inductive coupling of the two coils and are evaluated in the circuit on the chassis. <IMAGE>