System and method for performing auto-location of a tire pressure monitoring sensor arranged with a vehicle wheel

Abstract

Auto-location systems and methods of tire pressure monitoring sensor units arranged with a wheel of a vehicle detect a predetermined time (T 1 ) when a wheel phase angle reaches angle of interest using a rim mounted or a tire mounted sensor. The systems and methods transmit a radio frequency message associated with a wheel phase angle indication. The wheel phase angle indication triggers wheel phase and/or speed data such as ABS data at the predetermined time (T 1 ) to be stored. A correlation algorithm is executed to identify the specific location of a wheel based on the wheel phase and/or speed data at the predetermined time (T 1 ). TPM sensor parameters from a tire pressure monitoring sensor unit are assigned to the specific location of the wheel.

We claim: 
     
         1 . A wheel auto-location method, comprising:
 receiving a radio frequency (RF) transmission that indicates a one-measurement point during a rotation of a wheel and TPM sensor parameters, wherein the RF transmission is associated with a phase correlation data storage event trigger;   storing a current content of a rolling window of an antilock brake system (“ABS”) data indicative of a wheel phase angle in response to the phase correlation data storage event trigger, wherein a time period covered by the rolling window is the same or greater than a time period between the one-measurement point and a receipt point of the RF transmission, and the current content of the rolling window corresponds to the ABS data between the one-measurement point and the receipt point of the RF transmission;   calculating the one-measurement point based on the time period between the one-measurement point and the receipt point of the RF transmission;   determining relevant ABS data from the current content of the rolling window of the ABS data based on the one-measurement point over time; and   applying an auto-location algorithm to the relevant ABS data to identify a specific location of the wheel where the TPM sensor parameters are associated with the specific location of the wheel.