APPARATUS FOR ESTIMATING TIRE WEAR AMOUNT AND A VEHICLE ON WHICH THE APPARATUS FOR ESTIMATING TIRE WEAR IS MOUNTED

• US 20100060443A1
• Filed: 11/21/2007
• Published: 03/11/2010
• Est. Priority Date: 12/13/2006
• Status: Active Grant

• Current Assignee: Kabushiki Kaisha Bridgestone (Bridgestone Corporation)
• Original Assignee: Kabushiki Kaisha Bridgestone (Bridgestone Corporation)
• Inventors: Hanatsuka, Yasushi, Wakao, Yasumichi
• Granted Patent: US 8,493,200 B2
• Time in Patent Office: Days
• US Class Current: 340/444
• CPC Class Codes: B60C 11/246 Tread wear monitoring systems
• CPC Class Codes: B60C 99/006 Computer aided tyre design or simulation
• CPC Class Codes: Y10T 152/10027 with wear indicating feature

Abstract

A vehicle velocity detector 15 is provided, velocity V is detected from position data of the vehicle calculated by using signal from satellites, which is received by a GPS receiver 11 installed to a vehicle body, wheel rotation velocity V_w0 detected by a wheel velocity sensor 12 is corrected in accordance with tire inner pressure detected by a pressure sensor 13 so as to obtain wheel rotation velocity (correction value) V_w, velocity ratio R=(V_w/V), which is ratio of the corrected wheel rotation velocity V_w and the detected wheel velocity V, is calculated and tire wear amount is estimated in accordance with velocity ratio R so that tire wear amount can be measured precisely without processing the tire tread portion.

Claims

1. An apparatus for estimating tire wear amount comprising:

a GPS receiver installed to a vehicle;

a vehicle velocity detecting unit of detecting vehicle velocity from location data of the vehicle obtained by the GPS receiver;

a wheel rotation velocity measuring unit of measuring rotation velocity of a wheel of the vehicle and;

a wear amount estimating unit of estimating wear amount of the tire mounted on the vehicle from detected vehicle velocity and rotation velocity of the wheel.

3. The apparatus for estimating tire wear amount according to claim 1 further comprising:

a detecting unit of detecting inner pressure of the tire of the vehicle and;

a correcting unit of correcting measured rotation velocity of the wheel in accordance with detected inner pressure.

4. The tire wear mount estimating apparatus according to claim 1 further comprising:

a warning unit of warning when estimated wear amount of the tire exceeds predetermined value that is set in advance.

5. The vehicle comprising the tire wear amount estimating apparatus according to claim 1.

2. An apparatus for estimating tire wear amount comprising:

a vehicle longitudinal acceleration measuring unit installed to a vehicle body side of a vehicle and measuring longitudinal acceleration of the driven vehicle;

a wheel rotation velocity measuring unit of measuring rotation velocity of a wheel of the vehicle;

a calculating unit of calculating changing amount of measured rotation velocity of the wheel and;

a wear amount estimating unit of estimating wear amount of the tire mounted on the vehicle from measured longitudinal acceleration and calculated changing amount of wheel rotation velocity.