Adaptive EEPROM storage system for tire pressure loss detection
First Claim
1. A method for monitoring an operating state of at least one tire of a wheel of a vehicle, comprising:
- selecting one of at least two different monitoring modes as a function of at least one driving state variable that represents a driving state of the vehicle and determined on the vehicle;
monitoring at least one tire state variable that represents a current operating state of the tire; and
monitoring at least one calibration variable that represents a target state of the tire, wherein;
a first monitoring mode and a second monitoring mode each contain at least one calibration mode;
for each calibration mode, at least one calibration variable is determined as a function of at least one of a tire state variable, a driving state variable, a calibration request, and the selected monitoring mode;
the calibration variable is determined as a function of the number of tire state variables acquired and the selected monitoring mode; and
at least one of the following is performed;
determining a calibration variable of a first type when at least a first predefined number of tire state variables have been considered for the determination of the calibration variable; and
determining a calibration variable of a second type when a second predefined number of tire state variables have been considered for the determination of the calibration variable.
1 Assignment
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Accused Products
Abstract
A method and an apparatus for monitoring an operating state of at least one tire of a vehicle are provided. The monitored operating state may be, for example, the air pressure of the tire. One tire state variable that represents the current operating state of the tire, and one calibration variable that represents the target tire state of the tire, are taken into consideration in the monitoring. The monitoring is accomplished in different monitoring modes, i.e., the particular monitoring mode employed is determined as a function of at least one driving state variable representing the driving state. In an example embodiment, for a given driving state variable, the vehicle speed is selected as the differentiation criterion for the different monitoring modes.
22 Citations
15 Claims
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1. A method for monitoring an operating state of at least one tire of a wheel of a vehicle, comprising:
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selecting one of at least two different monitoring modes as a function of at least one driving state variable that represents a driving state of the vehicle and determined on the vehicle;
monitoring at least one tire state variable that represents a current operating state of the tire; and
monitoring at least one calibration variable that represents a target state of the tire, wherein;
a first monitoring mode and a second monitoring mode each contain at least one calibration mode;
for each calibration mode, at least one calibration variable is determined as a function of at least one of a tire state variable, a driving state variable, a calibration request, and the selected monitoring mode;
the calibration variable is determined as a function of the number of tire state variables acquired and the selected monitoring mode; and
at least one of the following is performed;
determining a calibration variable of a first type when at least a first predefined number of tire state variables have been considered for the determination of the calibration variable; and
determining a calibration variable of a second type when a second predefined number of tire state variables have been considered for the determination of the calibration variable. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for monitoring an operating state of at least one tire of a wheel of a vehicle, comprising:
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selecting one of at least two different monitoring modes as a function of at least one driving state variable that represents a driving state of the vehicle and determined on the vehicle;
monitoring at least one tire state variable that represents a current operating state of the tire; and
monitoring at least one calibration variable that represents a target state of the tire, wherein for monitoring of the tire state, the at least one tire state variable is determined by a difference in wheel rotation speeds between at least two wheels, and wherein the difference in wheel rotation speeds is calculated in at least one of the following ways;
calculating a difference in wheel rotation speeds between wheels of one axle;
calculating a difference in wheel rotation speeds between wheels positioned diagonally with respect to one another;
calculating a difference in wheel rotation speeds between a sum of wheel rotation speeds of the wheels of a front axle and a sum of wheel rotation speeds of the wheels of a rear axle; and
calculating a difference in wheel rotation speeds between a sum of wheel rotation speeds of the wheels of the left side and a sum of the wheel rotation speeds of the wheels of the right side;
wherein the calculated difference in wheel rotation speeds is normalized to the vehicle speed, and wherein the wheel rotation speeds are determined as a function of a wheel dynamics variable.
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11. An apparatus for monitoring an operating state of at least one tire of a wheel of a vehicle, comprising:
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an arrangement for selecting one of at least two different monitoring modes as a function of at least one driving state variable that represents a driving state of the vehicle and determined on the vehicle;
an arrangement for monitoring at least one tire state variable that represents a current operating state of the tire; and
an arrangement for monitoring at least one calibration variable that represents a target state of the tire, wherein;
a first monitoring mode and a second monitoring mode each contain at least one calibration mode;
the apparatus further comprises an arrangement for determining, for each calibration mode, at least one calibration variable as a function of at least one of a tire state variable, a driving state variable, a calibration request, and the selected monitoring mode;
the calibration variable is determined as a function of the number of tire state variables considered and the selected monitoring mode; and
the arrangement for determining at least one calibration variable performs at least one of the following;
determining a calibration variable of a first type when at least a first predefined number of tire state variables have been considered for the determination of the calibration variable; and
determining a calibration variable of a second type when a second predefined number of tire state variables have been considered for the determination of the calibration variable. - View Dependent Claims (12, 13)
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14. A computer-readable medium storing a sequence of program codes executable on a computer, the sequence of program codes performing a method of monitoring an operating state of at least one tire of a wheel of a vehicle, comprising the steps of:
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selecting one of at least two different monitoring modes as a function of at least one driving state variable that represents a driving state of the vehicle and determined on the vehicle;
monitoring at least one tire state variable that represents a current operating state of the tire; and
monitoring at least one calibration variable that represents a target state of the tire, wherein;
a first monitoring mode and a second monitoring mode each contain at least one calibration mode;
for each calibration mode, the sequence of program codes further performing the step of determining at least one calibration variable as a function of at least one of a tire state variable, a driving state variable, a calibration request, and the selected monitoring mode;
the calibration variable is determined as a function of the number of tire state variables acquired and the selected monitoring mode; and
the sequence of program codes further performing at least one of the following steps;
determining a calibration variable of a first type when at least a first predefined number of tire state variables have been considered for the determination of the calibration variable; and
determining a calibration variable of a second type when a second predefined number of tire state variables have been considered for the determination of the calibration variable.
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15. A computer program product having a sequence of program codes for performing a method of monitoring an operating state of at least one tire of a wheel of a vehicle, comprising the steps of:
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selecting one of at least two different monitoring modes as a function of at least one driving state variable that represents a driving state of the vehicle and determined on the vehicle;
monitoring at least one tire state variable that represents a current operating state of the tire; and
monitoring at least one calibration variable that represents a target state of the tire;
wherein;
a first monitoring mode and a second monitoring mode each contain at least one calibration mode;
for each calibration mode, at least one calibration variable is determined as a function of at least one of a tire state variable, a driving state variable, a calibration request, and the selected monitoring mode;
the calibration variable is determined as a function of the number of tire state variables acquired and the selected monitoring mode; and
at least one of the following is performed;
determining a calibration variable of a first type when at least a first predefined number of tire state variables have been considered for the determination of the calibration variable; and
determining a calibration variable of a second type when a second predefined number of tire state variables have been considered for the determination of the calibration variable.
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Specification