Tire pressure estimation
First Claim
1. A method for estimating the pneumatic pressure of a tire on a wheel of a vehicle, comprising the steps of:
- receiving into data processing means an input of data from a vehicle status sensor signal from a sensor of said vehicle, said sensor signal representing a vehicle status dependent on the pneumatic pressure of said tire;
calculating, by means of a data processing software implemented filter algorithm, an estimate of first parameter values of a model-based adaptive filter based on a predetermined model on the vehicle status dependent on the vehicle status sensor signal and on the offset for said sensor signal, wherein the offset is estimated by the model-based adaptive filter;
calculating, dependent on said first parameter values, a first tire pressure indication value being dependent on and indicative of the pneumatic pressure of the tire;
generating a tire pressure indication signal dependent on said tire pressure indication value; and
outputting said tire pressure indication signal.
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Accused Products
Abstract
A method, computer program product and apparatus for estimating the pneumatic pressure of a tire on a vehicle, comprising the steps of: receiving as an input a vehicle status sensor signal; estimating first parameter values of an adaptive filter based on a predetermined model on the vehicle status dependent on the vehicle status sensor signal; calculating, dependent on said first model parameter values, a first tire pressure indication value (δ) being dependent on and indicative of the pneumatic pressure of the tire. Specifically, the vehicle status signal may be an input a wheel angular velocity signal (1) and a lateral movement indication signal; the adaptive filter is based on a predetermined model on lateral vehicle dynamics dependent on the angular velocity of said wheel and the lateral movement of said vehicle.
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Citations
40 Claims
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1. A method for estimating the pneumatic pressure of a tire on a wheel of a vehicle, comprising the steps of:
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receiving into data processing means an input of data from a vehicle status sensor signal from a sensor of said vehicle, said sensor signal representing a vehicle status dependent on the pneumatic pressure of said tire; calculating, by means of a data processing software implemented filter algorithm, an estimate of first parameter values of a model-based adaptive filter based on a predetermined model on the vehicle status dependent on the vehicle status sensor signal and on the offset for said sensor signal, wherein the offset is estimated by the model-based adaptive filter; calculating, dependent on said first parameter values, a first tire pressure indication value being dependent on and indicative of the pneumatic pressure of the tire; generating a tire pressure indication signal dependent on said tire pressure indication value; and outputting said tire pressure indication signal. - 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, 29, 30, 31, 32, 33, 34, 35, 36)
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37. A computer program product for estimating the pneumatic pressure of a tire on a wheel of a vehicle, comprising program code adapted to direct a data processing system of a digital computer, the computer program code comprising sets of instructions adapted to:
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receiving into data processing means an input of data from a vehicle status sensor signal from a sensor of said vehicle, said sensor signal representing a vehicle status dependent on the pneumatic pressure of said tire; calculating, by means of a data processing software implemented filter algorithm, an estimate of first parameter values of a model-based adaptive filter based on a predetermined model on the vehicle status dependent on the vehicle status sensor signal and on the offset for said sensor signal, wherein the offset is estimated by the model-based adaptive filter; calculating, dependent on said first parameter values, a first tire pressure indication value being dependent on and indicative of the pneumatic pressure of the tire; generating a tire pressure indication signal dependent on said tire pressure indication value; and outputting said tire pressure indication signal. - View Dependent Claims (38)
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39. An apparatus for estimating the pneumatic pressure of a tire on a wheel of a vehicle, comprising:
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an input interface adapted for receiving into data processing means an input of data from a vehicle status sensor signal from a sensor of said vehicle, said sensor signal representing a vehicle status dependent on the pneumatic pressure of said tire; a data processing apparatus adapted for; calculating, by means of a data processing software implemented filter algorithm, an estimate of first parameter values of a model-based adaptive filter based on a predetermined model on the vehicle status dependent on the vehicle status sensor signal and on the offset for said sensor signal, wherein the offset is estimated by the model-based adaptive filter; calculating, dependent on said first parameter values, a first tire pressure indication value being dependent on and indicative of the pneumatic pressure of the tire; generating a tire pressure indication signal dependent on said tire pressure indication value; and an output interface adapted for outputting said tire pressure indication signal. - View Dependent Claims (40)
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Specification