| US 7,502,704 B2 | ||
| Method for monitoring the pressure of motor vehicle tires | ||
| Joerg Burghardt, Boeblingen (Germany); Wolfgang Kiesewetter, Altdorf (Germany); Jan Kipping, Stuttgart (Germany); and Frank Schlosser, Weissach (Germany) | ||
| Assigned to Daimler AG, Stuttgart (Germany) | ||
| Appl. No. 10/583,443 PCT Filed Dec. 11, 2004, PCT No. PCT/EP2004/014137 § 371(c)(1), (2), (4) Date Mar. 07, 2007, PCT Pub. No. WO2005/063511, PCT Pub. Date Jul. 14, 2005. |
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| Claims priority of application No. 103 60 122 (DE), filed on Dec. 20, 2003. | ||
| Prior Publication US 2007/0186634 A1, Aug. 16, 2007 | ||
| Int. Cl. G06F 19/00 (2006.01); G01C 25/00 (2006.01) | ||
| U.S. Cl. 702—98 [702/99; 702/116; 702/188; 701/29] | 13 Claims |
| 1. A method for monitoring the pressure of motor vehicle tires, comprising the acts of:
determining a tire pressure value indicative of a tire filling pressure;
comparing the determined tire pressure value with a stored nominal value; and
determining whether a motor vehicle tire is at an incorrect tire pressure, based upon a result of the comparison;
wherein the comparison of the determined tire pressure value with the stored nominal value, determined at an earlier time,
is used to determine whether a filling process characteristic change has occurred in the tire pressure value,
wherein one or more conditions are checked as a precondition for identification of the tire filling pressure, including at
least one of the ignition having been restarted following the vehicle having been stationary, a wheel sensor detected a pressure
change when the vehicle was stationary, and a wheel that has newly been fitted to the vehicle is detected,
wherein the characteristic change in the tire pressure value occurs when the difference between the determined tire pressure
value and the stored nominal value is greater than a predetermined threshold value for at least two wheels, and
wherein, when the tire pressure changes in a manner characteristic of a filling process, the stored nominal value is replaced
by a new nominal value if the determined tire pressure value is classified as plausible.
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