Other

Beru Ag

Doduco Gmbh

Ami Doduco Gmbh

Huf Hülsbeck & Fürst Gmbh Co.kg

Doduco Gmbh + Co. Dr. Dugene Durrwachter

Gunter Lothar Schulze

Norbert Normann

Ralf Kessler

Gunter Uhl

Michael Frank

Andreas Kuhnle

Karl-Heinrich Preis

Andreas K&uuml;hnle

G&uuml;nter Uhl

Markus Neumann

Ralph Kessler

Michael Schr&ouml;ttle

Joachim Ney

Gunther Uhl

A method for controlling the tire pressure in multiple axle vehicles whose wheels are equipped with pneumatic tires and speed sensors that supply an evaluation unit with signals indicative of the speed of the respective wheel, by

Method for controlling the tire pressure in multiple-axle vehicles

A device for monitoring and wirelessly signaling a pressure, or a change in pressure, in pneumatic tires on vehicles having a pressure sensor for measuring the pressure or the change in pressure; a transmitter for transmitting a signal derived from the measuring signal of the pressure sensor; a control circuit that activates the transmitter only from time to time; a battery (1) as current source; and a back-up capacitor connected in parallel to the battery. A controllable switching unit is provided by means of which the back-up capacitor can be connected in parallel to the battery from time to time for a limited period of time only.

Device for monitoring and wirelessly indicating a pressure or a pressure change in pneumatic tires mounted on vehicles

A system for the monitoring and wireless signaling of a pressure or a change of pressure in pneumatic tires on vehicles, comprising wheel electronics that are disposed inside the pneumatic tire and are provided with a battery as a power source, with a pressure sensor for measuring the pressure or the change of pressure, with a RF-transmitter for transmitting a signal derived from the signal of the pressure sensor, and with a (first) receiver for receiving wireless interrogation signals and/or control signals, a (second) receiver which is arranged in or on the vehicle and which receives the signal derived from the signal of the pressure sensor, a device for signaling to the driver information relating to the pressure or change of pressure, and transmitters for emitting interrogation signals and/or control signals, the transmitters being disposed, respectively, individually near each running wheel and having a transmission frequency of less than 1 MHz.

Device for the monitoring and wireless signaling of a pressure or a change of pressure in pneumatic tires

The invention describes a method for operating a device for monitoring and wireless signalling a pressure or a pressure change in pneumatic tires of wheels on vehicles, the device being hereinafter referred to as wheel electronics, wherein the pressure prevailing in the pneumatic tire is measured and electric pressure signals are derived from such measurements, and an information signal containing information on the pressure or on a pressure change is transmitted, the information signal being intended to be received by a receiver provided in or on the vehicle, the wheel electronics being set by a first control signal, which is transmitted in wireless fashion from outside the wheel electronics, to a first mode of operation in which the prevailing pressure or a pressure change is measured and signalled in response to the receipt of an interrogation signal generated outside the wheel electronics and transmitted to the wheel electronics in wireless fashion, and, if the wheel electronics do not receive another interrogation signal within a predetermined period of time after receipt of an interrogation signal, the wheel electronics adopting itself a second mode of operation in which the pressure or a pressure change is measured repeatedly and is transmitted at a transmission rate which is firmly preset or is variable and which is established in the wheel electronics for that second mode of operation.

Method for monitoring the tire pressure on vehicles

There is described an arrangement on vehicles equipped with wheels () with pneumatic tires, having an evaluation and control unit () arranged in the vehicle () and one or more receiving antennas (), that are assigned to individual wheels () or groups of wheels () of the vehicle () and are connected to the evaluation and control unit () via an RF receiver () comprising a demodulator (), for use in a tire-pressure monitoring system in which a unit (), that is mounted on the respective wheel () and that comprises a pressure sensor for measuring the pressure in the pneumatic tire and for generating an electric pressure-measurement signal, comprises a control circuit and a transmitter with a sending antenna for sending out, under the control of the control circuit, the pressure-measuring signal or a signal derived therefrom in the form of a radio-frequency signal. The invention provides that each receiving antenna () has assigned to it a separate RF receiver () in combination with a demodulator (), a circuit arrangement () for the generation of a digital electric identification signal characteristic of the mounting location of the respective receiving antenna (), and a BUS interface (), that the evaluation and control unit () comprises a BUS interface (), that the two BUS interfaces () are connected one to the other by a BUS (), for which purpose a plug-in connector () is provided which is connected to the BUS () by a first connector element () and to the BUS interface () of the RF receiver () by a second connector element (), and that the first connector element () of the plug-in connector is designed so as to provide an identifier in electric/mechanical form and to supply it to the circuit arrangement () provided on the side of the RF receiver (), through its connection to the second connector element (), for generation of the digital electric identification signal characteristic of the identifier of the first connector element ().

Device mounted on vehicles with pneumatic-tired wheels, for use in a tire pressure monitoring system

A system for monitoring and signaling by radio a pressure or a change in pressure in pneumatic tires of wheels on vehicles consists of a receiver unit provided in or on the vehicle to which at least one antenna is associated, and of a unit, arranged in the pneumatic tire, for measuring, evaluating and transmitting tire pressure signals.

System for monitoring and for signaling by radio the pressure in pneumatic tires on motor vehicles

There is described a method for determining the speed of a wheel on a motor vehicle, for which purpose an acceleration sensor is mounted on the wheel. It is proposed according to the invention to measure the frequency &ohgr; or the period T of an alternating signal contained in the acceleration signal supplied by the acceleration sensor and produced by the influence of gravitational acceleration g. The method is suited for use in automatic tyre-pressure monitoring systems for assigning signals, that have been transmitted by radio from a wheel-mounted electronic module, to a particular wheel position and for controlling the transmission rate of a wheel-mounted electronic module as a function of the speed.

Method for determining the speed of a wheel on a motor vehicle

A method for operating a device for monitoring and indicating a pressure change in vehicle tires by wire, being preferably arranged in the tire as one module together with the tire valve, and comprising a current source, a pressure sensor arranged for measuring the tire pressure at first time intervals, an analog/digital converter for digitizing a pressure signal obtained from the pressure sensor, a memory for storing the pressure signal, a transmitter for transmitting the measured tire pressure information to a receiving unit located in the vehicle, a comparator, especially one realized in one module with a microprocessor, which compares the pressure signal with a previously stored comparison pressure signal and controls the transmitter in such a way that the transmitter will transmit signals at second time intervals greater than the first time intervals, so long as the decrease of the pressure signal, relative to the comparison pressure signal (drift), does not exceed a threshold value, but will transmit signals at third time intervals smaller than the second time intervals when and so long as the drift exceeds the pressure threshold value; to this end the second time intervals are varied in response to one or more physical conditions that are measured in the tire and that vary in driving operation.

Method for operating a device for the monitoring and wireless signaling of a pressure change in pneumatic tires of a vehicle

The proposed device is fitted on vehicles equipped with pneumatic tires and is used for monitoring tire pressure. The device comprises: a pressure measurement sensor on each of the wheels (,) being monitored; a transmitter mounted next to each pressure measurement sensor which emits signals carrying the pressure data obtained from the pressure measurement sensor, and a receiver for those signals fitted on the vehicle chassis. An antenna (,) is arranged next to each wheel (,) as the receiver. The antennae are connected to a common receiving and monitoring circuit (,).

Device fitted on vehicles for monitoring tyre pressure

A vehicle tire pressure monitoring system includes a pressure sensor, a transmitter, and a transmitting antenna at each of N wheels of the vehicle, and at least one receiving antenna attached to the vehicle, respectively allocated to each transmitting, antenna. The receiving, antenna is connected to an electronic receiving, and analysis system which determines whether a signal belongs to the local vehicle by allocating an identifier characterizing the individual wheel to its transmitter. Emitted signals contain the identifier and are forwarded to the central electronic receiving and analysis system, which records the signal intensities under the signal's identifier, compares the intensities, selects those N transmitter identifiers with the greatest intensities, then stores the N transmitter identifiers as belonging to the vehicle.

Method of allocating transmitters of a tire pressure monitoring system to a particular vehicle

A tire pressure monitoring device includes a pressure measurement sensor provided on each of the wheels to be monitored, a transmitter arranged near each pressure measurement sensor for sending signals representative of the pressure determined by the pressure measurement sensor, respective antennas for receiving the signals, the antennas being arranged on the vehicle chassis near the respective wheel. Each antenna is formed by making use of a separate electric line belonging to another monitoring system that is associated to the same wheel or is formed by making use of a sensor belonging to another monitoring system associated to the same wheels. Alternatively an electric line that leads to another consumer which is associated to the respective wheel, like a lamp, is used as an antenna.

Growing community of inventors

Ispringen, Germany

Gunter Lothar Schulze