TIRE PRESSURE INFORMATION MONITORING SYSTEM

• US 20100089140A1
• Filed: 05/07/2008
• Published: 04/15/2010
• Est. Priority Date: 05/07/2007
• Status: Active Grant

• Current Assignee: Bridgestone Corporation
• Original Assignee: Bridgestone Corporation
• Inventors: Toyofuku, Masanobu
• Granted Patent: US 8,266,954 B2
• Time in Patent Office: Days
• US Class Current: 73/146.500
• 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 23/0457 self triggered by timer
• CPC Class Codes: G01L 17/00 Devices or apparatus for measuring tyre pressure or the pressure in other inflated bodies
• CPC Class Codes: G01M 17/02 Tyres

Abstract

A tire pressure information monitoring system includes a pressure sensor (24) for detecting air pressure within a tire, and a temperature sensor (25) for detecting temperature within the tire. The monitoring system further includes a CPU (21) that operates with a high frequency clock to send command to the pressure sensor (24) and the temperature sensor (25) to acquire internal information of the tire, and thereafter operates with a low frequency clock until stabilizing time of the pressure sensor (24) and the temperature sensor (25) elapses. The CPU then operates with a high frequency clock to transmit the internal information of the tire, which has been acquired by the pressure sensor (24) and the temperature sensor (25), to an external receiver at a constant time interval, and thereafter operates with a low frequency clock until the constant time interval elapses.

Claims

1. A tire pressure information monitoring system including a sensor for acquiring internal information of a tire, and operating with a low frequency clock and/or a high frequency clock, wherein:

said monitoring system operates with the high frequency clock, to transmit a command signal to the sensor to acquire the tire internal information; and

said monitoring system thereafter operates with the low frequency clock.

2. The tire pressure information monitoring system according to claim 1, wherein the sensor is one of a pressure sensor and a temperature sensor.

3. A tire pressure information monitoring system including a sensor for acquiring internal information of a tire, and operating with a low frequency clock and/or a high frequency clock, wherein;

said monitoring system operates with the high frequency clock, to transmit the tire internal information acquired by the sensor to an external receiver means at a constant time interval; and

said monitoring system operates, after transmission of the tire internal information, with the low frequency clock until expiration of said time interval.

4. The tire pressure information monitoring system according to claim 3, wherein the sensor is one of a pressure sensor and a temperature sensor.