Method for operating a tire pressure-monitoring unit, and tire pressure-monitoring unit
First Claim
1. A method for operating a tire pressure monitoring unit for monitoring pneumatic tires of a vehicle, comprising:
- providing a pressure sensor, an acceleration sensor and a transmitter connected to a control unit;
automatically taking a pressure measurement at regular intervals using the pressure sensor;
automatically transmitting wirelessly the pressure measurement at larger intervals as compared to the regular intervals by the transmitter;
automatically checking by the control unit whether a pressure change exceeding a first or a second threshold value has occurred, and, if so, taking and transmitting pressure measurements at shortened intervals as compared to the regular intervals;
automatically utilizing by the control unit the first threshold value for the pressure change in the case of a stationary vehicle and automatically utilizing by the control unit the second threshold value for pressure change in the case of a moving vehicle, wherein the first threshold value differs from the second threshold value; and
automatically establishing by the control unit, by evaluating a signal of the acceleration sensor, whether the first threshold value or the second threshold value is used.
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Accused Products
Abstract
A method for operating a tire pressure monitoring unit for monitoring pneumatic tires of a vehicle includes where a pressure measurement is taken at regular intervals using a pressure sensor and the pressure information is transmitted wirelessly at larger intervals by a transmitter. A control unit checks whether a pressure change exceeding a threshold value has occurred, and, if so, pressure measurements are taken at shortened intervals and the transmission activity is increased. The control unit uses a first threshold value for the pressure change in the case of a stationary vehicle and uses a second threshold value, which differs from the first threshold value, for the pressure change in the case of a moving vehicle. The control unit, by evaluating a signal of an acceleration sensor of the tire pressure monitoring unit, establishes whether the first threshold value or the second threshold value is used.
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Citations
17 Claims
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1. A method for operating a tire pressure monitoring unit for monitoring pneumatic tires of a vehicle, comprising:
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providing a pressure sensor, an acceleration sensor and a transmitter connected to a control unit; automatically taking a pressure measurement at regular intervals using the pressure sensor; automatically transmitting wirelessly the pressure measurement at larger intervals as compared to the regular intervals by the transmitter; automatically checking by the control unit whether a pressure change exceeding a first or a second threshold value has occurred, and, if so, taking and transmitting pressure measurements at shortened intervals as compared to the regular intervals; automatically utilizing by the control unit the first threshold value for the pressure change in the case of a stationary vehicle and automatically utilizing by the control unit the second threshold value for pressure change in the case of a moving vehicle, wherein the first threshold value differs from the second threshold value; and automatically establishing by the control unit, by evaluating a signal of the acceleration sensor, whether the first threshold value or the second threshold value is used. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A tire pressure monitoring unit, comprising:
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an acceleration sensor; a pressure sensor; a transmitter configured for wirelessly transmitting pressure information; and a control unit configured for controlling measurement and transmission activity, the control unit in electronic communication with the acceleration sensor, the pressure sensor and the transmitter; wherein the tire pressure monitoring unit is configured to take pressure measurements at first intervals and is configured to transmit the pressure measurements at second intervals in a driving mode, where the second intervals are longer than the first intervals; wherein the tire pressure monitoring unit is configured to take pressure measurements at third intervals in a parking mode, the third intervals longer than the first intervals, and is configured to transmit the pressure measurements in the parking mode at fourth intervals; wherein the control unit is configured to evaluate signals of the acceleration sensor and configured to switch between the driving mode and the parking mode in accordance with a result of the evaluation; wherein the control unit is configured to switch from the parking mode to a parking warning mode when a pressure change exceeding a first stored threshold value is determined, and wherein the control unit is configured to switch from the driving mode to a driving warning mode when a pressure change exceeding a second stored threshold value is determined, where the first threshold value deviates from the second threshold value; and wherein when the control unit is configured to take the pressure measurements in the warning modes at intervals which are shorter than the first intervals and to transmit the pressure measurements at intervals which are shorter than the second intervals. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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Specification