The Yokohama Rubber Co., Ltd.

Casio Computer Co., Ltd.

Kazuhiro Shimura

Mitsuru Naito

Osamu Takahashi

Fumito Yatsuyanagi

Takumi Sekiguchi

Hiroshi Iizuka

Yukio Tozawa

Hirokatsu Maruyama

Eiji Chiashi

Kenji Iwahara

In a pneumatic tire () on which a transponder () is mounted, a securing member () for securing the transponder () is fixed to an inner surface of the tire in an area (S) between a tire maximum-width position (A) and a bead toe (B). Thereby, a large centrifugal force and a large impact force do not act on the transponder () storing various pieces of information, and the transponder can be mounted quickly and securely. Also, the weight of the transponder is remarkably reduced, and thus uniformity of the tire () is enhanced. Additionally, dynamic balance correction is made easier. Even in a large tire, reduction in durability is minimized through suppressing heat generation and heat accumulation of the tire () due to the transponder () and the securing member ().

Pneumatic tire and method of mounting transponder to pneumatic tire

There is provided a vehicle abnormality detection method detecting an abnormal state in which a high temperature occurs due to maladjustment of a vehicle bearing mechanism section or vehicle brake mechanism section, and a device thereof and a sensor unit thereof. By use of the sensor unitmounted in a rim, an air temperature within a tireis sensed as a first temperature and a temperature (second temperature) of the rimis sensed as a temperature related to at least one of a temperature of the vehicle bearing mechanism section and a temperature of the vehicle brake mechanism section. Then a temperature difference between the first and second temperatures is calculated and when the temperature difference is a predetermined value or more, it is determined that an abnormality has occurred in the vehicle bearing mechanism section or vehicle brake mechanism section. The abnormality is thus detected.

Vehicle abnormality detection method and device thereof and sensor unit thereof

Provided is a pneumatic tire with which a search time for a transponder can be reduced, and with which, for a passive transponder functioning with energy transmitted from the outside, efficiency of energy transmission can be enhanced. The pneumatic tire of the present invention provided with a transponder has an identification tag, which indicates a position of the transponder, and which is disposed to an outer surface of a portion of the tire, the portion being where the transponder is disposed. Furthermore, for a pneumatic tire having a transponder on a sidewall part thereof, an identification tag, which indicates the position of the transponder, is provided to an outer surface of a portion of the tire, the portion being where the transponder is disposed, and another identification tag, which indicates at least the position of the transponder in the circumferential direction of the tire, is provided to an outer surface of the other sidewall part of the tire, which is on the opposite side of the sidewall part where the transponder is disposed.

Pneumatic tire with transponder and indicator of transponder position

An evaluation method for pneumatic tires and a system thereof, is provided, capable of appropriately evaluating an adverse effect, such as deterioration, of tire temperature by expressing severity of a temperature imposed on a member of tire made of rubber or the like in quantitative and convenient manners. Detection counts are calculated for each detected temperature according to a detection counts calculating unitbased on information of temperatures of pneumatic tires detected by a temperature sensor of a temperature detector. Temperature severity numbers of the pneumatic tires are calculated from a computing equation by a severity calculating unitbased on the detection counts and contribution coefficients of deterioration of tire rubber with temperatures stored in a contribution coefficient storageas parameters. Using the calculated temperature severity number, a determination unitdetermines thermal deterioration of the tire.

Evaluation method for pneumatic tires and system thereof

A vehicle monitoring system which can readily identify information transmitted from each detecting device without requiring registration of identifying information of the detecting device is to be provided. Detecting devices transmit vehicle information including at least the result of detection and self-identifying information; a tractor relaying device and a trailer relaying device add their self-identifying information to vehicle data received on the basis of the identifying information of the detecting devices and transmit the vehicle data, and transmit registration data including their own relaying device IDs and types indicating the registration of the relaying device IDs; the tractor relaying device stores the relaying device ID of the registration data transmitted from the trailer relaying device on the basis of the type information and transmits that registration data, and transmits vehicle data received from the trailer relaying device on the basis of the relaying device ID. The display device receives the registration data and the vehicle data transmitted from the tractor relaying device, and stores the relaying device ID of the registration data on the basis of type information.

Vehicle monitoring system

A vehicle monitoring system which may easily identify information transmitted from each of detecting devices without registration of identification information of the detecting devices and a transponder thereof are provided. A display is disposed in a distal end of the transponders all connected in series through a cable. Each of the detecting devices detects conditions in a predetermined portion of a vehicle and transmits vehicle information including measurement results, its own identification information and the number of transmissions. Each of the transponders determines whether the vehicle information transmitted from the detecting devices is received or not based on the identification information of the detecting devices registered in advance, and transmits the vehicle information to the transponder connected to the transmitting side or the display, when it determines that the vehicle information is to be received. Also, the each transponder receives the vehicle information transmitted from the transponder connected to the receiving side, updating the number of transmissions included in the vehicle information and transmits the vehicle information to the transponder connected to the transmitting side or the display.

Vehicle monitoring system and transponder thereof

Acquired wheel information such as temperature data and inflation pressure data is surely transmitted from a transmitter in a status where the transmitter is not located in a dead space, by controlling timing wherein the transmitter acquires the wheel information, a transmission time width and transmitting timing of the data to be transmitted from the transmitter by radio.

Wheel information acquiring system

An apparatus and method for fixing an installation object on a wheel, which are enabled to restrain rotation of a housing caused by a tightening torque of a worm screw, and to thereby prevent breakage of the housing. The apparatus for fixing an installation object on a wheel includes a band which is looped around a rim well portion of the wheel and holds the installation object. While a housing for holding a worm screw is fixed to one end portion of the band, a plurality of slits for engaging with a thread of the worm screw are provided in the other end portion of the band. The apparatus includes a rotation restraining mechanism which projects more outward than the housing in a width direction of the band, and restrains rotation of the housing caused by a tightening torque of the worm screw.

Tool and method for fixing installation object on wheel

A vehicle-mounted communication antenna to be mounted on a vehicle for performing communication by an electromagnetic wave, includes an antenna body having an antenna case and an antenna element contained in the antenna case, and an antenna cover for protecting the antenna body that can transmit the electromagnetic wave.

Vehicle-mounted communication antenna

A tire-side-mounted electronic device according to the present invention includes at least two types of power sources having different discharging characteristics from each other. An electric load is connected to the power sources.

Tire-side-mounted electronic device

A sensor system for a tire, which enables the installation condition of a sensor unit in a tire's air chamber to be know. A sensor system where a sensor unit is installed in a tire's air chamber has detecting means for detecting a relative change in the distance between the sensor unit and a position where the sensor unit is installed.

Sensor system for tire

An installation structure for an electronic component for a tire, where a case for the electronic component attached to a rim well portion can be prevented from being destroyed during attachment and removal of the tire to and from a wheel. In the installation structure, the electronic component received in the case is attached to the rim well portion in a tire air chamber. When the case is subjected to external force applied in the radial direction of the tire, the case is positionally released from a fixed state before it is destroyed by the force.

Installation structure for electronic component for tire

An installation structure of an electronic component for a tire, where the installation structure protects the electronic component from heat produced by a tire and a braking device and enables accurate information about the inside of the tire to be obtained without being affected by the heat sources. In the installation structure, an electronic component housed in a case is installed at an arbitrary installation in the air chamber of a tire and a heat-insulating structure is interposed between the electronic components and the installation position.

Installation structure of electronic component for tire

An antenna device having an antenna to be mounted on the body side of a vehicle for receiving a radio signal from a tire condition detection device mounted on a tire side, or giving and receiving a radio signal between the tire condition detection device and a device mounted on the vehicle body side. The antenna device includes attachment means with which the antenna can be temporarily attached, moved and securely attached to the vehicle body side.

Growing community of inventors

Hiratsuka, Japan

Kazuhiro Shimura