Ford Global Technolgoies, LLC

Arick Evan Rushing

Dilip B Patel

Jochen Schubert

Vishal Bhushan

A method to facilitate secure communication between a first tire pressure monitoring system (TPMS) and a vehicle is disclosed. The method may include obtaining a trigger signal to auto-locate the first TPMS from a plurality of TPMSs. The method may further include obtaining learning mode advertisements from each TPMS responsive to obtaining the trigger signal. The learning mode advertisements may include a random value and a test value associated with each TPMS. The test value may be an encrypted value generated using TPMS keys. The method may further include calculating a vehicle test value using the random value and a vehicle pre-shared key, and comparing the test value with the vehicle test value. The method may further include auto-locating the first TPMS based on the comparison. The method may include receiving vehicle tire condition data from the first TPMS responsive to auto-locating the first TPMS.

Tire pressure monitoring system communication method and system

Systems and methods for implementing two-way tire pressure monitoring system (TPMS) learning and authenticated pairing. A random value may be used to determine a test value and a pairing PIN by use of a HMAC (Hash-based Message Authentication Code) function and a pre-shared key that is accessible to a TPMS sensor and a vehicle (e.g., controller system thereof). The random value and test value may be broadcasted by the TPMS sensor and received by the vehicle. The vehicle may calculate the pairing PIN using the random value and the pre-shared key.

Two-way tire pressure monitoring system (TPMS) learning and authenticated pairing

This disclosure generally pertains to systems and methods that guard against information piracy by selective activation of tire pressure sensor learning operations in a vehicle. An example method can include receiving, by a processor in a vehicle, a sensor signal from a wheel movement sensor provided in a wheel of the vehicle. The processor may evaluate the sensor signal and detect a tire-changing operation. The tire-changing operation may be detected, for example, based on a major surface of the wheel coming in contact with ground or determining that an angular displacement of a major surface of the wheel exceeds a threshold angle. The processor may then enable a learning mode of operation that can include a wireless pairing of a tire pressure sensor in the wheel to a tire pressure monitoring system of the vehicle. The processor disables the learning mode of operation after a period of time.

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YPSILANTI, MI, United States of America

Arick Evan Rushing