Tire pressure detection system and a wheel used therein

• US 20040155764A1
• Filed: 01/07/2004
• Published: 08/12/2004
• Est. Priority Date: 02/10/2003
• Status: Active Grant

• Current Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Original Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Inventors: Ichinose, Hidemi
• Granted Patent: US 7,091,840 B2
• Time in Patent Office: Days
• US Class Current: 340/447
• 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 23/0413 Wireless charging of active radio frequency circuits
• CPC Class Codes: B60C 23/0442 the transmitted signal comprises further information, e.g. instruction codes, sensor characteristics or identification data
• CPC Class Codes: B60C 23/0461 externally triggered, e.g. by wireless request signal, magnet or manual switch
• CPC Class Codes: B60C 23/0462 Structure of transmission protocol
• CPC Class Codes: B60C 23/04985 using straps surrounding the rims

Abstract

A wheel provided with a tire sensor unit having a sensor and a radio transmitter. The sensor detects a pressure and temperature of a tire, and generates a tire pressure data signal and a tire temperature data signal based on the pressure and temperature of the tire. The radio transmitter generates a data signal including the tire pressure data signal and the tire temperature data signal, and transmits the data signal by wireless.

Claims

1. A wheel provided with a tire sensor unit,

the tire sensor unit comprising:

a sensor which detects a pressure and a temperature of a tire, and generates a tire pressure data signal and a tire temperature data signal based on the pressure and temperature of the tire; and

a radio transmitter which generates a data signal including the tire pressure data signal and the tire temperature data signal, and transmits the data signal by wireless.

2. A wheel according to claim 1, wherein the tire sensor unit is a flexible sheet.

3. A wheel according to claim 1, wherein the tire sensor unit is provided at a position adjoining to an air valve being disposed on a rim or a position opposite across a rotation center of wheel with respect to the air valve.

4. A wheel according to claim 2, wherein the tire sensor unit is provided at a position adjoining to an air valve being disposed on a rim or a position opposite across a rotation center of wheel with respect to the air valve.

5. A wheel according to claim 3, wherein the tire sensor unit is attached to a well of the wheel using a bonding agent or an adhesive.

6. A wheel according to claim 5, wherein the bonding agent without a plasticizer or the adhesive without a plasticizer is used for attaching the tire sensor unit to the well.

7. A tire pressure detections system comprising:

a tire sensor unit including

a sensor which detects a pressure and a temperature of a tire, and generates a tire pressure data signal and a tire temperature data signal based on the pressure and the temperature of the tire, and

a radio transmitter which generates a data signal including the tire pressure data signal and the tire temperature data signal, and transmits the data signal by wireless;

a wheel having the tire sensor unit attached thereon; and

a receiver unit, receiving the data signal transmitted from the radio transmitter.

8. A tire pressure detection system according to claim 7, further comprising:

a power supply mechanism, which supplies electric power for driving the tire sensor unit to the tire sensor unit in a contactless manner.

9. A tire pressure detection system according to claim 7, wherein

a carrier wave, used in a keyless entry system of vehicle door lock mechanism, is used for exchanges of the data signal between the radio transmitter and the receiver unit.

10. A tire pressure detection system according to claim 8, wherein

a carrier frequency, used in a keyless entry system of vehicle door lock wave, is used for exchanges of the data signal between the radio transmitter and the receiver unit.

11. A tire pressure detection system according to claim 7, further comprising:

a tire fault detector, which computes a tire pressure and tire temperature based on the data signal and compares the tire pressure and tire temperature with threshold values of the tire pressure and the tire temperature, respectively, and

the tire fault detector which raises an alarm, using at least one of a beep sound and a flash of light, in order to notify an occurrence of a trouble of the tire, when the tire pressure is below a predetermined value thereof and the tire temperature exceeds a predetermined temperature thereof.

12. A tire pressure detection system according to claim 8, further comprising:

a tire fault detector, which computes a tire pressure and tire temperature based on the data signal and compares the tire pressure and tire temperature with threshold values of the tire pressure and the tire temperature, respectively, and

the tire fault detector which raises an alarm, using at least one of a beep sound and a flash of light, in order to notify the occurrence of a trouble of the tire, when the tire pressure is below a predetermined value thereof and the tire temperature exceeds a predetermined temperature threof.

13. A tire pressure detection system according to claim 9, further comprising:

a tire fault detector, which computes a tire pressure and tire temperature based on the data signal and compares the tire pressure and tire temperature with threshold values of the tire pressure and the tire temperature, respectively, and

the tire fault detector which raises an alarm, using at least one of a beep sound and a flash of light, in order to notify an occurrence of a trouble of the tire, when the tire pressure is below a predetermined value thereof and the tire temperature exceeds a predetermined temperature thereof.

14. A tire pressure detection system according to claim 10, further comprising:

a tire fault detector, which computes a tire pressure and tire temperature based on the data signal and compares the tire pressure and tire temperature with threshold values of the tire pressure and the tire temperature, respectively, and

the tire fault detector raises an alarm, using at least one of a beep sound and a flash of light, in order to notify the occurrence of a trouble of the tire, when the tire pressure is below a predetermined value thereof and the tire temperature exceeds a predetermined temperature thereof.