METHOD OF ASSOCIATING TIRE PRESSURE CONTROL APPARATUSES TO WHEEL POSITIONS
First Claim
1. A method for the allocating of tire pressure control devices of a tire pressure control system of a vehicle to the different positions at which respectively a wheel of the vehicle is mounted, the method comprising the steps of:
- providing a system, the system comprising;
a number of first sensors, corresponding to the number of wheel positions, which are each fixedly allocated to one of the wheel positions and can detect a rotation speed or an angular speed of the wheel which is mounted in the wheel position;
a number of tire pressure control devices, coinciding with the number of the mounted wheels, which devices are mounted on the wheels rotating together with these, are provided with an individual identification and contain a second sensor for determining a measurand, from the chronological development of which the rotation speed of the respective wheel or the angular speed of the wheel can be derived;
a central unit, in which the allocation of the tire pressure control devices to respectively one wheel position, namely the identification of the tire pressure control device situated in the wheel position in connection with the associated wheel position, can be stored;
wherein it is known by the central unit from this method which first sensor is allocated to which wheel position by;
delivering repeatedly a measured value M1 for successive time segments Δ
T by the first sensors, the measured value M1 being a measurement for the rotation speed or for the angular speed of the wheel to which the respective first sensor is allocated;
sending, by the tire pressure control devices, their individual identification to the central unit in chronological intervals;
wherein in each rotating tire pressure control device;
detecting pointwise the development of the measurand from which the rotation speed or the angular speed of the associated wheel can be derived by means of the second sensor over a predetermined rotation angle φ
of the wheel as a function of time;
low pass filtering of the chronological development of the measurand in a first time interval Δ
t1 following the detection of the measurand detected during the rotation of the wheel about the predetermined rotation angle φ
;
storing the result of the filtering;
determining a second measured value M2 from the filtered development of the measurand, which is a measurement for the rotation speed or respectively for the angular speed of the associated wheel in the range of the observed predetermined rotation angle φ
;
transmitting, by each tire pressure control device, the second measured value M2 together with its identification to the central unit at the end of a second time interval Δ
t2, the duration of which is not less than the first time interval Δ
t1;
comparing, in the central unit as a result of this transmittal, the second measured values M2 transmitted by the tire pressure control devices with the measured values M1 detected in a timely manner by the first sensors of all wheels; and
storing the identification of the tire pressure control device respectively under that wheel position in which the measured value M1 delivered by the first sensor best coincides with the measured value M2.
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Accused Products
Abstract
Tire pressure control devices include first sensors to deliver repeatedly a measured value M1 for the rotation speed of the wheel. A measurand, from which the rotation speed of the associated wheel can be derived, is detected in a pointwise manner by means of a second sensor over a predetermined rotation angle φ of the wheel as a function of time, is subjected to a low pass filtering in a subsequent first time interval Δt1 and from the filtered development of the measurand a second measured value M2 is determined, which is a measurement for the rotation speed or respectively for the angular speed of the associated wheel. Each tire pressure control device transmits at the end of a second time interval Δt2 the second measured value M2 together with an identification of the tire pressure control device to a central unit. Comparing M1 and M2 determines wheel position.
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Citations
28 Claims
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1. A method for the allocating of tire pressure control devices of a tire pressure control system of a vehicle to the different positions at which respectively a wheel of the vehicle is mounted, the method comprising the steps of:
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providing a system, the system comprising; a number of first sensors, corresponding to the number of wheel positions, which are each fixedly allocated to one of the wheel positions and can detect a rotation speed or an angular speed of the wheel which is mounted in the wheel position; a number of tire pressure control devices, coinciding with the number of the mounted wheels, which devices are mounted on the wheels rotating together with these, are provided with an individual identification and contain a second sensor for determining a measurand, from the chronological development of which the rotation speed of the respective wheel or the angular speed of the wheel can be derived; a central unit, in which the allocation of the tire pressure control devices to respectively one wheel position, namely the identification of the tire pressure control device situated in the wheel position in connection with the associated wheel position, can be stored; wherein it is known by the central unit from this method which first sensor is allocated to which wheel position by; delivering repeatedly a measured value M1 for successive time segments Δ
T by the first sensors, the measured value M1 being a measurement for the rotation speed or for the angular speed of the wheel to which the respective first sensor is allocated;sending, by the tire pressure control devices, their individual identification to the central unit in chronological intervals; wherein in each rotating tire pressure control device; detecting pointwise the development of the measurand from which the rotation speed or the angular speed of the associated wheel can be derived by means of the second sensor over a predetermined rotation angle φ
of the wheel as a function of time;low pass filtering of the chronological development of the measurand in a first time interval Δ
t1 following the detection of the measurand detected during the rotation of the wheel about the predetermined rotation angle φ
;storing the result of the filtering; determining a second measured value M2 from the filtered development of the measurand, which is a measurement for the rotation speed or respectively for the angular speed of the associated wheel in the range of the observed predetermined rotation angle φ
;transmitting, by each tire pressure control device, the second measured value M2 together with its identification to the central unit at the end of a second time interval Δ
t2, the duration of which is not less than the first time interval Δ
t1;comparing, in the central unit as a result of this transmittal, the second measured values M2 transmitted by the tire pressure control devices with the measured values M1 detected in a timely manner by the first sensors of all wheels; and storing the identification of the tire pressure control device respectively under that wheel position in which the measured value M1 delivered by the first sensor best coincides with the measured value M2. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification