Abstract: Method for monitoring the state of a tire, in which at least one analysis value (UR i), from which the state of a tire is determined, is formed from wheel speed signals (?rot i) of the vehicle wheels, wherein the analysis value (UR i) is an absolute rolling circumference of a tire or a variable which represents the absolute rolling circumference of a tire, in particular a dynamic tire radius which is determined by evaluating wheel speed signals (?rot i) and signals from at least one sensor in order to measure the speed of the vehicle over an underlying surface, and the analysis value (UR i) is used to determine a loss of pressure and/or working loads of the tire.

Abstract: Disclosed is a method for detection of a pressure loss in motor vehicle tires, which detects pressure loss on at least one vehicle tire based on several parameters, which are calculated from the rolling circumference of the tires. To this end, currently calculated parameters are compared with learnt values of the parameters.

Abstract: A method of determining absolute rolling circumferences of tires of a motor vehicle is disclosed, in which the absolute rolling circumferences (Ui) of the tires are determined by evaluating wheel rotational speed signals (?i) and signals (dj) of at least one distance sensor, as well as a tire pressure check system.

Abstract: A method for assisting a driver when parking or maneuvering a motor vehicle having at least one driver assistance system and a vehicle safety system is provided. The method includes the steps of detecting the surroundings and calculating a desired path in a calculation model, in which the differences in traveling distance between the individual wheels are monitored and determined by means of the vehicle safety system. The desired path is predicted in a calculation model by means of the differences in traveling distance, and detection of the surroundings is carried out by means of the driver assistance system. Furthermore, a system which is suitable to implement the method is provided.

Abstract: A method and a system for detecting the type of tire are disclosed, in particular in an indirectly measuring tire pressure monitoring system, which detects tire inflation pressure loss from the wheel rotational behavior. At least one modified vehicle tire is used, which incites specific patterns related to tire properties in the wheel rotational speed signal, and information about the tire is acquired by evaluation of the wheel rotational speed information.

Abstract: A method for the detection of the loading of a motor vehicle determines a loading condition of the vehicle using an analysis of the rotational behavior of the wheels. In a frequency analysis, it determines the natural frequencies of the wheels and looks at the amplitudes of the tire noise around those frequencies, which amplitudes change when the loading condition changes.

Abstract: Method for automatically initializing an indirectly measuring tire pressure monitoring system which due a change of the rotational behavior of the vehicle wheels, in particular a change in the rolling circumference detects a deflation on the vehicle wheels by comparing learnt reference values with continuously detected new values (1), where furthermore a deflation on the vehicles wheels is detected by evaluating the natural frequency of the single vehicle wheels (3) and where an automatic initialization (5) is being executed, if the indirectly measuring tire pressure monitoring system during the movement of the vehicle after a standstill detects a deflation on a vehicle wheel compared with the situation before the standstill of the vehicle (2), whereas the evaluation of the natural frequency of the vehicle wheels does not detect a deflation on the same vehicle wheel (4).

Abstract: Method for the indirect tire pressure monitoring in which there are performed a rolling circumference analysis of the tires, in which rolling circumference analysis variables (?DIAG, ?SIDE, ?AXLE) are determined from actually found and learnt test variables describing the rotation of the wheels, and a frequency analysis of the natural oscillation behavior of at least one tire in which at least one frequency analysis variable (fk) is determined, in which case an evaluation of the rolling circumference analysis (A) and the natural frequency analysis (C) and a combined evaluation (B) of both methods of analysis is performed for warning indication of tire pressure loss.

Abstract: Method for the indirect tire pressure monitoring in which an analysis of the natural oscillation behavior of at least one tire is performed and at least one pressure loss analysis variable (fFL, fFR, fRL, fRR), in particular a natural frequency, is determined, in which case a temperature compensation (4) of the pressure loss analysis variable (fFL, fFR, fRL, fRR) is performed, and in which case a tire temperature (Ttire) calculated by means of a temperature model (1) is used to determine a compensation quantity (2), in particular the quotient of variation of the pressure loss analysis variable and change in temperature.

Abstract: Disclosed is a method of indirect tire pressure monitoring. The method includes: learning test variables (DIAG, SIDE, AXLE), which describe the rotational movements of the wheels; determining rolling circumference differences (?DIAG, ?SIDE, ?AXLE) from actually determined test variables and the learnt test variables; learning at least one torsion natural frequency fp for at least one tire from the oscillation behavior of the individual tires; determining at least one shift of the torsion natural frequency ?fp from at least one actually determined torsion natural frequency and from the at least one learnt torsion natural frequency; and combining the rolling circumference differences (?DIAG, ?SIDE, ?AXLE) with the at least one shift of the torsion natural frequency fp in a joint warning strategy for detecting and warning of tire inflation pressure loss.

Abstract: A method of detecting the tire sensitivity is described. The method includes determining the tire load Ftire of the vehicle, determining rotational speed information of the wheels, determining the tire sensitivity from the variation of the wheel rotational speed information depending on the variation of the tire load Ftire.

Abstract: The invention relates to an allocation method for a combined tire pressure monitoring system in motor vehicles, at least partly comprising wheels with pneumatic tires being equipped with pressure measuring modules, and each pressure measuring module records a tire inflation pressure or a value responsive to the tire inflation pressure and sends the latter to a receiving unit connected to an evaluating device by using a transmitting unit connected to the respective pressure measuring module together with an individual identification code (IDx) allocated to the respective pressure measuring module, and wherein signals about the rotational speed of each one wheel being sensed by means of wheel rotational speed sensors are transmitted to the evaluating device, and the installation positions y (VL: front left, VR: front right, HL: rear left, HR: rear right) of the wheels at the vehicle are known to the evaluating device, the wheels at the vehicle are known to the evaluating device, and the allocation method is per

Abstract: Disclosed is a tire pressure monitoring device for a motor vehicle. A tire pressure monitoring system with direct measurement includes a transmission device for transmitting tire pressure values determined by pressure sensors, and a tire pressure monitoring system with indirect measurement that operates on the basis of wheel speed sensors. The tire pressure monitoring system with direct measurement includes a tire pressure measuring device for measuring a tire pressure value only on each wheel of a driven vehicle axle and on at most one wheel of a non-driven axle. The tire pressure monitoring system with indirect measurement includes wheel speed sensors on the non-driven vehicle axle.

Abstract: Disclosed are different processes for the determination of the internal pressure, particularly of the minimum pressure of the tire of a motor vehicle during driving operation, through an analysis of the characteristic vibration behavior of the wheel, whereby the standardized amplitude is determined from the vibration spectrum determined and the resonance frequency is observed.

Abstract: The present device relates to a method of improving a indirect measurement tire pressure detection system. Such systems include a system that detects pressure loss based on wheel speed data. The present method determines reference values dependent upon driving parameters and produces a two-dimensional or multi-dimensional closed range of driving parameters. The closed range of driving parameters uses reference values that are determined to be currently valid.

Abstract: A method for determining the load exerted on the tire of a motor vehicle or to monitor the tire pressure, the invention discloses a method wherein during operation of the vehicle the pressure in the individual wheels is detected and the rotational behavior of the individual wheels is monitored, and wherein load distribution characteristic quantities are determined by comparing the rotational behavior or changes in said rotational behavior of the individual wheels during given driving conditions taking onto account preset or learnt variables, and wherein finally the charge or load exerted on the tires or pressure loss is concluded from the tire pressure and the load distribution characteristic quantities.

Abstract: The invention discloses a method for compensating temperature in a system for tire pressure monitoring which is especially implemented by detecting a tire pressure and/or by detecting a tire pressure loss. The method is especially characterized in that the temperature is compensated by determining the gas temperature in the tire by way of at least two items of temperature information and by taking the determined temperature as a basis for said tire inflation monitoring. One significant advantage of this method involves that externally active temperature changes, such as a heat-emitting brake disc causing the wheel rim of the tire and, hence, also a temperature sensor arranged thereat to be heated more intensely than the gas in the tire, do not lead to an indication error with respect to the tire pressure (or a spurious alarm).

Abstract: The present invention relates to a method of detecting straight-ahead driving according to a first straight-ahead driving detection method based on information on the rotational speed of a wheel by way of memorizing a curve parameter in a learning phase, in particular in selected driving situations, and the curve parameter is formed from the wheel speed information of one or more axles, and the reciprocal value of the curve radius is calculated from the wheel speed information to determine the curve parameter. The invention also relates to a computer program product comprising an algorithm defined by the above method.

Abstract: The present invention relates to a method of detecting growth of the dynamic tire circumference (circumferential growth or tire growth), wherein at least one reference value Ref is produced on the basis of wheel speed information, said reference value representing in particular a sidewise and/or crosswise relation of the motor vehicle wheels, and wherein the time variation of the reference value(s) is examined and, further, tire growth is detected on the basis of said variation.

Abstract: The pressure in a motor vehicle tire can be determined by means of a ‘wheel-independent’ device (1) that is in a largely rigid manner connected mechanically to an element (2) of the vehicle body (3, 14) oscillating with the motor vehicle wheel (4). In order to determine the—preferably absolute—tire pressure by combining the evaluation of rotational speed data and axle frequency analysis, said device (1) includes a signal pre-processing element (6) provided with electronic components for processing the sensor signals, said element being connected to a magnetic sensor element (7) and an acceleration sensor element (8) or to a combined magnetic/acceleration sensor element (5) by means of an electrically conductive element connection (9), wherein the magnetic sensor element (7) or the magnetic/acceleration sensor element (5) is operatively connected to a magnetic encoder (16) arranged on the wheel side.