초록 ▼

An apparatus for monitoring the air pressure in a pneumatic tire carried by the rim of a vehicle wheel, comprising a sensing element which is arranged at the rim ring and which can be deformed and acted upon by the tire pressure, with a permanent magnet as the measurement value generator, in the reg

An apparatus for monitoring the air pressure in a pneumatic tire carried by the rim of a vehicle wheel, comprising a sensing element which is arranged at the rim ring and which can be deformed and acted upon by the tire pressure, with a permanent magnet as the measurement value generator, in the region of rotary movement of which is disposed a measurement value sensor which is fixed to the vehicle in a stationary position and which is connected to an evaluation circuit. The apparatus is reliable in operation and uncomplicated in structure.

대표청구항 ▼

Apparatus for monitoring the air pressure in a pneumatic tire carried by the rim of a vehicle wheel which comprises: a pneumatic tire having a tire air space; a vehicle wheel having a rim carrying said tire along an axis; a sensing element arranged at the rim which can be deformed and acted upon by

Apparatus for monitoring the air pressure in a pneumatic tire carried by the rim of a vehicle wheel which comprises: a pneumatic tire having a tire air space; a vehicle wheel having a rim carrying said tire along an axis; a sensing element arranged at the rim which can be deformed and acted upon by tire pressure; a permanent magnet as a measurement value generator connected to the sensing element; a measurement value sensor in operative relationship to the permanent magnet arranged in the region of rotary movement of the wheel and fixed to the vehicle in a stationary position; an evaluation circuit connected to the measurement value sensor; wherein the sensing element is in the form of a bellows mounted with a substantially axis-parallel direction of movement; and wherein the permanent magnet which is connected to the sensing element is displaceable in axis-parallel relationship at the outside of the tire in dependence on the tire pressure, wherein at normal tire pressure the permanent magnet remains in a position close to the measurement value sensor with a greater spacing therebetween at reduced tire pressure, said apparatus including an attachment housing on the rim with said bellows projecting from said attachment housing into the tire air space, a bistable rocker member for moving said permanent magnet and an axial rod connecting said bellows with said rocker member, wherein said permanent magnet is mounted in axis-parallel relationship.