Method for operating a tire pressure-monitoring unit, and tire pressure-monitoring unit

摘要

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.

主权项

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.