Bridgestone Announces Development of New Technology for Estimating Tyre Wear Based on the Concept of CAIS

Dec, 17 2014

Tire sensing technology delivers improved driving experience 

Bridgestone Corporation announced today it has developed a new technology for estimating tyre wear and tread depth.This innovative technology is based on the Contact Area Information Sensing (CAIS*1) concept. 

As tyre tread becomes worn, the tyre’s ability to grip wet road surfaces may decrease, increasing the potential of low-traction occurrences. In addition, a tyre that has experienced extremely uneven or lopsided wear is at greater risk of causing a vehicle malfunction. 

The new technology utilises sensors attached to the inside of tyres to obtain information on changes in tread condition during normal driving. By analysing this information, the technology estimates tread wear conditions and provides the driver with real-time monitoring of tyre conditions.

By providing drivers with real-time tyre information, such as the remaining tread depth and whether tyres are experiencing uneven wear, Bridgestone’s technology will contribute to improved driving conditions by enabling users to judge the most appropriate timing for tyre replacement. Furthermore, this technology helps to prevent uneven wear by enabling consumers better understand the optimal timing for tyre rotations, thereby allowing them use their tyres for the longest possible period without waste. 

By bringing this technology to practical application, Bridgestone hopes to help customers cut costs while also delivering peace of mind. Bridgestone continues to support the safety of driving experience by developing innovative tyres and technologies.


Overview of CAIS (Bridgestone’s Sensing Technologies)

Overview of Wear Estimating Technology

(1) Acceleration sensors equipped on the inside of tyres detect bends in tire treads. This information is then transmitted to analytical equipment mounted on the vehicle via wireless communications. The sensor system is powered by a generator also installed inside the tyre.

(2) Vehicle-mounted analytical equipment analyses the transmitted data in real-time to estimate tyre wear condition.

(3) By estimating tire wear condition, the technology enables consumers to replace tyres before treads are worn, and also helps them better understand the optimal timing for tyre rotations. Overall, this technology can contribute to a safer driving experience and help lower costs for users.

*1. CAIS is a general term for Bridgestone’s tyre sensing (*2) technologies, which provide value to consumers by collecting tyre contact area data and using this information to determine road surface and tyre conditions.

*2. Sensing refers to the use of sensors to measure target variables.