Tire pressure monitoring system

• US 20070013499A1
• Filed: 08/28/2006
• Published: 01/18/2007
• Est. Priority Date: 03/25/2002
• Status: Active Grant

• Current Assignee: Infineon Technologies AG
• Original Assignee: Infineon Technologies AG
• Inventors: Hammerschmidt, Dirk
• Granted Patent: US 7,511,609 B2
• Time in Patent Office: Days
• US Class Current: 340/442
• CPC Class Codes: B60C 23/0408 transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
• CPC Class Codes: B60C 23/0474 Measurement control, e.g. setting measurement rate or calibrating of sensors; Further processing of measured values, e.g. filtering, compensating or slope monitoring

Abstract

In the system for monitoring tire pressure in a tire of a vehicle, temporally successive tire pressure measured values are sensed by a transmitting unit, and at least part of the tire pressure measured values is transmitted to a receiving unit with a variable frequency of occurrence, wherein the frequency of occurrence is derived from the sensed tire pressure measured values by means of a control unit.

Claims

1-41. -41. (canceled)

42. A computer program with a program code, stored on a computer readable medium and executable by a computer system, for performing a method of monitoring the tire pressure in a vehicle tire, in which temporally successive tire pressure measured values are sensed by a pressure detector, and at least part of the tire pressure measured values is transmitted from a transmitter to a receiver with a variable frequency of occurrence, wherein the frequency of occurrence is derived from the sensed tire pressure measured values, the computer program comprising:

instructions for decrementing or incrementing a count of counter beginning with a starting value;

instructions for comparing the count with a tire pressure change dependent parameter derived from the sensed tire pressure measured values; and

instructions for triggering a transmission when the count reaches the tire pressure change dependent parameter.

43. A computer program with a program code, stored on a computer readable medium and executable by a computer system, for performing a method of monitoring tire pressure in a tire of a vehicle, wherein tire pressure measured values are sensed by a pressure detector at successive measuring time instants, and the tire pressure measured values are transmitted from a transmitter to a receiver at successive transmission time instants, wherein the distance between successive measuring time instants and/or the distance between successive transmission time instants is adjustable and is derived from the sensed tire pressure measured values, the computer program comprising:

instructions for sensing a plurality of tire pressure measured values;

instructions for ascertaining an instantaneous pressure dynamics state in the tire occurring as a result of the instantaneous driving situation of the vehicle from the plurality of tire pressure measured values, comprising;

instructions for evaluating a plurality of successive tire pressure measured values to obtain a tire pressure dependent driving situation parameter;

instructions for comparing the tire pressure dependent driving situation parameter with a comparison parameter; and

instructions for ascertaining the instantaneous pressure dynamics state from the comparison;

and

instructions for adjusting the measuring time instants or the transmission time instants corresponding to the ascertained instantaneous pressure dynamics state.

44-45. -45. (canceled)