improved method for passenger car tire pressure monitoring system

摘要

An improved method for a passenger car tire pressure monitoring system (TPMS), including improvements of a direct TPMS or an indirect TPMS technique. The direct TPMS uses a dynamic tire pressure reference as a tire pressure determination basis, and monitors the real-time tire load, e.g., when the wheel load changes, the TPMS data processing center takes the tire cold inflation pressure data corresponding to the real-time load as the current tire pressure reference, and performs determinations and warnings for the real-time tire pressure data. The indirect TPMS establishes a wheel speed reference database based on a vehicle speed reference, and conducts compensations and corrections for wheel speed distortions caused by the tire wear in use, and performs an analysis and comparison between the compensated and modified real-time wheel speed and the data from the wheel speed reference database, and makes a real-time tire pressure information indication or warning.