Patent ID: 6194999
Filing Date: 2001-02-27
Classification: B60C

Abstract:
Device on vehicles with wheels having air tires, for monitoring the air pressure in the tires using a pressure sensor on each of the tires (2) to be monitored, with each pressure sensor accompanied by a transmitter which sends out signals containing the sensed air pressure, and with antennas for receiving the signals which are fastened to the chassis of the vehicle, whereby merely one antenna (4; 5a-8a) is arranged in the vicinity of each wheel (2) and the antennas (4; 5a-8a) are connected with a common electronic receiving and evaluating circuitry (15, 17), characterized in that from each of the electric lines (5, 6, 7, 8) connecting the antennas with the receiving circuitry (15), a branch line (19, 20) with a rectifier (21) branches off, and the branch line connects with a microcomputer serving as an evaluating circuitry (17) which is controlled by the rectified signals in such a way that every time when a signal is received from the transmitter (3) on the wheel (2) by way of one of the antennas, the microcomputer (17) evaluates only that signal which is sent by the corresponding line (5-8) to the receiving circuitry (15).