Patent ID: 7701326
Filing Date: 2010-04-20
Classification: B60C

Abstract:
1. A tire information transmitter comprising: a sensor unit having a pressure sensor for measuring a pressure in a tire cavity region; a control unit for comparing the measured pressure to a first threshold value and a second threshold value to generate i) an operation signal indicating that the tire information transmitter is operating after measurement of the pressure is started and until the measured pressure reaches the first threshold, and ii) a pressure signal representing the measured pressure after the measured pressure exceeds the first threshold; and a transmitting unit for wirelessly transmitting the pressure signal or the operation signal; wherein the control unit controls the transmitting unit in such a way that the transmitting unit transmits the operation signal after the measurement of the pressure is started and until the measured pressure reaches the first threshold, and controls the transmitting unit in such a way that the transmitting unit transmits the pressure signal and wherein the control unit further controls a frequency at which the transmitting unit transmits the pressure signal based upon whether the measured pressure falls below the second threshold value after the measured pressure exceeds the first threshold value; and wherein the second threshold value is greater than the first threshold value.