Tire-inflation method, and device and machine for implementing the method
First Claim
1. Method for inflating a tyre (5) on a vehicle wheel (3) by means of an inflation machine (2) controlled by a programmable data management unit (17), the said method comprising the steps of:
- a) using a wheel (3) where at least one of the components (4, 5 and 6) of the wheel (3) is provided with an information medium (7, 8, 9) carrying a temperature sensor (20) able to supply the value of the temperature of the tyre (5) on the wheel, the said information medium (7, 8, 9) being able to be consulted automatically and able to supply, when it is consulted, at least one data item (Tp) that can be used for inflating the tyre, b) automatically consulting the said information medium (7, 8 or 9) and automatically transmitting to the said programmable data management unit (17) at least the value of the temperature (Tp) of the tyre supplied by the temperature sensor (20), c) supplying to the programmable data management unit (17) at least one data item for defining a set value (Pc) for the inflation pressure of the tyre (5), d) measuring the ambient temperature on the site of the inflation machine (2), e) calculating an average value of the said ambient temperature over a predefined elapsed time period, f) calculating, on the basis of the said set value (Pc) for the inflation pressure, a corrected set value (Pcc) taking account of the value of the temperature (Tp) of the tyre (5) supplied by the temperature sensor (20), the corrected set value Pcc being calculated according to the formula in which Pc is the said set value for the inflation pressure, Tp is the temperature of tyre (5) supplied by the temperature sensor (20) and Tref is a variable reference temperature chosen as being the lowest temperature amongst the instantaneous ambient temperature measured on the site of the inflation machine (2) and the said calculated average value of the ambient temperature, the pressures Pc and Pcc being in absolute value and the temperatures Tp and Tref being in degrees K, g) measuring the value of the pressure of the air inside the tyre (5), h) adjusting, by inflation or deflation, the value of the pressure of the air inside the tyre to the calculated corrected set value (Pcc).
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Accused Products
Abstract
The invention relates to a tyre-inflation method and to a device and machine which are used to carry out said method. The inventive method consists in adjusting the pressure of a tyre (5) according to a corrected set value Pcc which is calculated using formula (I), wherein: Pc is a set value recommended by a car manufacturer and a tyre producer; Tp is the temperature of the tyre (5), which is supplied by a temperature sensor installed in the tyre; and Tref is a variable reference temperature which is selected as being the lowest temperature from the instantaneous ambient temperature measured (37) at the site of the inflating machine (2) and a calculated mean value for ambient temperature, pressures Pc and Pcc being given in absolute value and temperatures Tp and Tref being given in degree K.
28 Citations
28 Claims
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1. Method for inflating a tyre (5) on a vehicle wheel (3) by means of an inflation machine (2) controlled by a programmable data management unit (17), the said method comprising the steps of:
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a) using a wheel (3) where at least one of the components (4, 5 and 6) of the wheel (3) is provided with an information medium (7, 8, 9) carrying a temperature sensor (20) able to supply the value of the temperature of the tyre (5) on the wheel, the said information medium (7, 8, 9) being able to be consulted automatically and able to supply, when it is consulted, at least one data item (Tp) that can be used for inflating the tyre, b) automatically consulting the said information medium (7, 8 or 9) and automatically transmitting to the said programmable data management unit (17) at least the value of the temperature (Tp) of the tyre supplied by the temperature sensor (20), c) supplying to the programmable data management unit (17) at least one data item for defining a set value (Pc) for the inflation pressure of the tyre (5), d) measuring the ambient temperature on the site of the inflation machine (2), e) calculating an average value of the said ambient temperature over a predefined elapsed time period, f) calculating, on the basis of the said set value (Pc) for the inflation pressure, a corrected set value (Pcc) taking account of the value of the temperature (Tp) of the tyre (5) supplied by the temperature sensor (20), the corrected set value Pcc being calculated according to the formula in which Pc is the said set value for the inflation pressure, Tp is the temperature of tyre (5) supplied by the temperature sensor (20) and Tref is a variable reference temperature chosen as being the lowest temperature amongst the instantaneous ambient temperature measured on the site of the inflation machine (2) and the said calculated average value of the ambient temperature, the pressures Pc and Pcc being in absolute value and the temperatures Tp and Tref being in degrees K, g) measuring the value of the pressure of the air inside the tyre (5), h) adjusting, by inflation or deflation, the value of the pressure of the air inside the tyre to the calculated corrected set value (Pcc). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. Device for inflating a tyre (5) on a vehicle wheel (3), comprising:
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a) at least one automatically consultable information medium (7, 8 or 9) carried by at least one of the components (4, 5 or 6) of the wheel (3) whose tyre (5) is to be inflated, the said information medium carrying a first temperature sensor (20) able to supply the value of the temperature of the tyre (5) on the wheel (3) and being able to supply, when it is consulted, at least one data item (Tp) that can be used for inflating the tyre (5), b) a consultation and transmission means (19) able to automatically consult the said information medium (7, 8 or 9) and to automatically transmit the said at least one data item to a programmable data management unit (17), c) the said programmable data management unit (17), d) a second temperature sensor (27) for measuring the ambient temperature on the site of the inflation machine (2), e) calculation means included in the said programmable data management unit (17) for calculating a corrected set value (Pcc) for the inflation pressure of the tyre (5) to be inflated, on the basis of a set value (Pc) for the inflation pressure defined from at least one data item supplied to the said programmable data management unit (17), and taking account of the value of the temperature (Tp) of the tyre supplied by the first temperature sensor (20), the programmable data management unit (17) being programmed so that the said calculation means calculate an average value of the said ambient temperature over a predefined elapsed time period, and calculate the corrected set value Pcc according to the formula;
in which Pc is the said set value for the inflation pressure, Tp is the temperature of the tyre (5) supplied by the first temperature sensor (20) and Tref is a variable reference temperature that is chosen as being the lowest temperature from amongst the instantaneous ambient temperature measured on the site of the inflation machine (2) by the second temperature sensor (37) and the said calculated average value of the ambient temperature, the pressures Pc and Pcc being in absolute value and the temperatures Tp and Tref being in degrees K, f) at least one means (35, 16) for measuring the value of the pressure of the air inside the said tyre (5) to be inflated and for supplying the value of the measured pressure to the said programmable data management unit (17), g) an inflation machine (2), controlled by the said programmable data management unit (17) for adjusting the value of the pressure of the air inside the tyre (5) to the correct set value (Pcc) calculated by the said calculation means. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. Inflation machine for vehicle wheels having at least one component (4, 5 or 6) that is provided with an information medium (7, 8 or 9) carrying a first temperature sensor (20) able to supply the value of the temperature of the tyre (5) on the corresponding wheel (3), the said information medium (7, 8 or 9) being automatically consultable and able to supply, when it is consulted, at least one data item (Tp) that can be used for inflating the tyre, the said machine (2) comprising:
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a) a consultation and transmission means (19) able to automatically consult the said information medium (7, 8 or 9) and to automatically transmit the said at least one data item to a programmable data management unit (17), b) the said programmable data management unit (17), c) a second temperature sensor (27) for measuring the ambient temperature on the site of the inflation machine (2), d) calculation means included in the said programmable data management unit (17) for calculating a corrected set value (Pcc) for the inflation pressure of the tyre (5) to be inflated, on the basis of a set value (Pc) for the inflation pressure defined from at least one data item supplied to the said programmable data management unit (17), and taking account of the value of the temperature (Tp) of the tyre supplied by the first temperature sensor (20), the programmable data management unit (17) being programmed so that the said calculation means calculate an average value of the said ambient temperature over a predefined elapsed time period, and calculate the corrected set value Pcc according to the formula;
in which Pc is the said set value for the inflation pressure, Tp is the temperature of the tyre (5) supplied by the first temperature sensor (20) and Tref is a variable reference temperature that is chosen as being the lowest temperature from amongst the instantaneous ambient temperature measured on the site of the inflation machine (2) by the second temperature sensor (37) and the said calculated average value of the ambient temperature, the pressures Pc and Pcc being in absolute value and the temperatures Tp and Tref being in degrees K, e) a pressure sensor (35) able to measure the value of the pressure of the air inside the said tyre (5) to be inflated and for supplying the value of the measured pressure to the said programmable data management unit (17), f) inflation means (24-29) controlled by the said programmable data management unit (17) for adjusting the value of the pressure of the air inside the tyre (5) to the corrected set value (Pcc) calculated by the said calculation means. - View Dependent Claims (23, 24, 25, 26, 27, 28)
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Specification