Patent ID: 8600607
Filing Date: 2013-12-03
Classification: B60C

Abstract:
1. A method for determining the relative position of a wheel of a vehicle having an installed sensing unit for a tire pressure monitoring system, comprising: providing a plurality of sensing units each comprising a pressure sensor and a motion sensor both connected to a transmitter; providing a single receiver connected to an evaluation device disposed anywhere within the vehicle, the single receiver not dependent upon a signal strength or a specific location in the vehicle; attaching a sensing unit from the plurality of sensing units inside each wheel of the vehicle in an identical orientation with respect to the wheel; transmitting data on a repeatable basis from the transmitter of each sensing unit, the data comprising a pressure reading data, a rotational speed data, a rotational direction data and an identifier; receiving the data by the receiver of the evaluation device; determining via the evaluation device whether each sensing unit is located on a right side position or a left side position of the vehicle from the rotational direction data; calculating via the evaluation device a distance traveled during a time period of less than 2 seconds of each wheel from the rotational speed data; and determining via the evaluation device whether each sensing unit is located in a front wheel position or a rear wheel position by comparing the distance traveled of each left side sensing unit and each right side sensing unit during the time period by recognizing the front wheel travels at least a threshold value multiple or threshold percentage further as compared to the rear wheel when the vehicle is traveling around a corner, wherein the threshold value multiple comprises 1.004 or the threshold percentage comprises 0.4 percent; and allocating via the evaluation device a final position of each wheel to the identifier of each sensing unit from the plurality of sensing units.