Sumitomo Rubber Industries Limited

Omron Corporation

Toyota Jidosha Kabushiki Kaisha

Yukio Nakao

Hiroaki Kawasaki

Wakahiro Kawai

Masaru Kijima

Minao Yanase

Hideki Ohashi

Tsutomu Kono

Mitsuhiro Wada

Masahiro Yonetani

Shigeaki Takigawa

Chou Wen San

Hiroshi Yoshinaga

A puncture repair kit that reduces the difference between a pressure displayed on a manometer of a compressor device and an actual tire internal pressure. The compressor device () is connected with a bottle unit () directly. A capcomprises a one-way valve () to prevent puncture-sealing agent from flowing back toward the compressor device. A cylinder () of the compressor device () comprises a branch chamber () receiving compressed air from a pump chamber (). The branch chamber () is connected with an air feeding passage () extending toward a bottle unit (), a manometer (), a relief valve (), and a surge chamber () to store the compressed air from the pump chamber () and to reduce the pressure fluctuation of the compressed air.

Puncture repair kit

Disclosed is a cap unit wherein safety is increased by preventing a reversed flow of a puncture-sealing agent. A cap main body () comprises an air flow passage () consisting of a vertical flow passage (A) extending downward from an air passage upper opening (), a lateral flow passage (B) laterally extending from an air intake port (), and a connecting flow passage (C) connecting therebetween. The air flow passage () is provided with a reversed flow preventing device (). The cap main body () is provided with a vertical hole () consisting of first to fourth vertical holes (A toD) which have inner diameters increasing downwardly from the upper end in a stepwise manner, and the first to third vertical holes (A toC) form the vertical flow passage (A).

Cap unit for a tire puncture repair apparatus

A cap unit is provided with: a cap body having a first flow channel for feeding the compressed air from a compressor into a bottle container, and a second flow channel for sequentially taking out a puncture repair agent and the compressed air from the bottle container; and a first and second inner lids which are independent from one another and which close the first and second flow channels. The cap body has a boss portion extending upward from the bottom surface of a mouth portion securing recess, and provided with a first inner lid securing portion. The first inner lid is fitted into the first inner lid securing portion The upper opening portion of the first flow channel opens further inward than the first inner lid securing portion, and the upper opening portion of the second flow channel opens further outward than the first inner lid securing portion.

Cap unit for puncture repair

A vehicle estimate navigation apparatus including: a speed vector calculation means for calculating, based on GPS information by a GPS receiver mounted in a running vehicle, a speed vector of a running speed of the vehicle; a tire rotation information detection means for detecting rotation information of tires attached to the vehicle; a tire rotation speed calculation means for calculating rotation speeds of the tires based on tire rotation information obtained by the tire rotation information detection means; a speed calculation means for calculating a vehicle speed based on the speed vector information; a yaw rate calculation means for calculating a vehicle yaw rate based on the speed vector information; a first parameter calculation means for calculating a first parameter of a first relational expression between the vehicle speed calculated by the speed calculation means and the tire rotation speed, the vehicle speed being obtained based on a formula model for calculating a tire ground speed based on the tire rotation speeds obtained by the tire rotation speed calculation means; and a second parameter calculation means for calculating a second parameter of a second relational expression between the yaw rate calculated by the yaw rate calculation means and the tire rotation rate, the yaw rate being obtained based on a formula model for calculating a tire ground speed based on the tire rotation speeds obtained by the tire rotation speed calculation means.

Vehicle estimate navigation apparatus, vehicle estimate navigation, and vehicle estimate navigation program

Deadhesion of an IC tag inlet during vulcanization molding of tire is suppressed, while preventing adhesion of a portion other than a sticking out portion. An IC tag comprises a sheet-like IC tag inlet, a protective coverof an unvulcanized rubber sheet adhered to the surface Sf of the inletthrough a primer layerand an adhesive layer, and an antiadhesive layerformed on the rear surface Sr of the inlet, wherein a maximum value Ga'max of storage shear modulus Ga&#x2032; of a rubber of the protective coverat a temperature of 150 to 200&#xb0; C. and a storage shear modulus Gb&#x2032;of the primer layerat a temperature Tshowing the maximum value Ga&#x2032;max satisfy the following equation: Ga&#x2032;max&#xd7;10&#x3c;Gb&#x2032;

IC tag, pneumatic tire fitted with the same, and method of fitting IC tag

Provided is a method which is free from falling into a state impossible for detecting inner pressure lowering of tires even when GPS signals cannot be received and capable of precisely detecting inner pressure lowering of tires. A method for alarming inner pressure lowering of tires comprising a step of receiving satellite electric wave utilized for GPS and then detecting inner pressure lowering of tires utilizing the information of the satellite electric wave, and a step of detecting inner pressure lowering of tires utilizing wheel speed information, wherein said method comprises a step of judging whether the judgment result of inner pressure lowering of tires detected in the respective steps is adopted or not.

Method for alarming inner pressure lowering of tires using GPS information and device thereof, and program for alarming inner pressure lowering of tires

The present invention provides a method for attaching an IC tag. In the method, an IC tag performing wireless communication using an electronic component appropriately disposed is attached to an article made from an elastically deformable material. Specifically, the IC tag is attached to a predetermined portion of the article, exclusive of a disposition section where the electronic component is disposed. The invention provides (i) an IC tag which is not damaged even when attached to an article made from an elastically deformable material, such as a tire used under extreme environment, (ii) a method for attaching the IC tag, and (iii) an article with the IC tag attached.

Method for attaching IC tag, article with IC tag attached, and IC tag

Provided is a method for detecting decrease in an inner pressure of a tire with excellent accuracy by calculating accurate dynamic load radii by comparing the GPS speed information with tire rotational speed information collecting data only when a stable measurement of the dynamic load radii is possible, as well as by utilizing GPS positioning information for a running state of a vehicle, and an apparatus and a program thereof. The present invention is characterized in judging decrease in an inner pressure of a tire from change in size of dynamic load radii by comparing an effective dynamic load radius with an initial value preliminarily stored as a dynamic load radius at a normal inner pressure, wherein the effective dynamic load radius is obtained by calculating an apparent dynamic load radius of a tire at running by successively comparing a calculated speed of a vehicle by a GPS device, in which the speed of the vehicle at running is calculated from information obtained by the GPS device, with a rotational speed of the tire obtained by a tire rotational speed detection apparatus installed on tire rotational portions of four wheels of the vehicle, and judging the apparent dynamic load radius to be effective only when a running state is judged to be straight on a flat road at a constant speed from GPS positioning information.

Method for detecting decrease in inner pressure of tire using GPS speed information

A judgment method of road surface condition includes steps of: periodically detecting the wheel rotational speeds of the four wheel tires of a vehicle, memorizing the wheel rotational speed of each of tires, determining a slip ratio from said wheel rotational speeds, determining the acceleration or deceleration of the vehicle, determining a relation equation between said slip ratio and the acceleration or deceleration of the vehicle, determining a judgment value for judging a friction coefficient between the road surface and tires based on the slope of said relation equation determined, and setting a threshold which is used for judging the friction coefficient from the judgment value using the information of wireless tags which were buried in the tires.

Method for judging road surface condition and device thereof, and program for judging road surface condition

A pneumatic tire () has a tire cavity surface (HS) to which an accommodation tool () for accommodating an electronic component is bonded. The accommodation tool () includes an accommodation space () for accommodating an electronic component (W) therein, and includes a bonding region (Sb) which is bonded to the tire cavity surface (HS) and which is provided on one end of a back surface (S) directed to the tire cavity surface (HS). Only the bonding region (Sb) is bonded to the tire cavity surface (HS), thereby making it possible to separate a portion of a non-bonding region (Sa) on the side of the other end of the back surface (S) from the tire cavity surface (HS).

Pneumatic tire having accommodation tool of electronic component

A method, apparatus and program for judging road surface conditions on which a vehicle is running. The method, apparatus and program includes the steps of: obtaining wheel speed rotational information of driving wheels of the vehicle during running from wheel speed detectors, receiving GPS radio waves to calculate positional information, and judging road surface conditions during running on the basis of a relationship between the wheel speed rotational information and the positional information. Conditions of road surfaces on which a vehicle is running can be accurately judged.

Method and apparatus for judging road surface conditions and program for judging road surface conditions

A vehicle wheel speed is calculated based on a vehicle wheel speed signal outputted from a vehicle wheel speed sensor and a change width w which is an amplitude of a time change component of the calculated vehicle wheel speed. When the calculated change width w is equal to or more than a reference value wit is judged that a quick tire deformation is currently generated and a driver of the vehicle is informed of the quick deformation by actuating a warning device.

Tire information obtaining device, method for obtaining tire information and tire information obtaining program

A method for alarming decrease in tire air-pressure. The method includes the steps of: detecting rotational information of respective tires; respectively calculating and storing a wheel speed, a vehicle acceleration, a slip ratio between front and rear wheels, a running distance and a turning radius; accumulating the running distance, the moving-averaged vehicle acceleration and the slip ratio between front and rear wheels; obtaining a linear regression coefficient and a correlation coefficient of the vehicle acceleration and the slip ratio; judging whether at least a driving wheel tire has decompressed upon comparing a judged value of the linear regression coefficient and a reference value for internal pressure of the linear regression coefficient; and issuing an alarm of decrease in tire air-pressure. It is possible to improve performance and safety of the vehicle since it is possible to detect decompression of tires including at least one driving wheel tire, for instance, of not less than two wheel tires including the right and left driving wheels.

Method and apparatus for alarming decrease in tire air-pressure, and program for judging decompression of tire

A method for detecting abnormalities of a tire which detects abnormalities of a tire on the basis of rotational information obtained from tires attached to wheels of a vehicle. The method includes the steps of: detecting rotational pulses of wheels of the tires, calculating and storing rotational information of the tires on the basis of the rotational pulses, calculating and processing fluctuations in rotational pulse intervals in a single rotation of the tires on the basis of the rotational information, and storing data during driving which have been processed for each single rotation and performing prediction of abnormalities of a tire on the basis of changes in the data. Irregularities in rotational information of rotational pulses in a single rotation of the tires are detected for predicting a danger of abnormalities occurring to the tires to thus enable safe driving.

Method and apparatus for detecting abnormalities of tire, and program for detecting abnormalities of tire

A method and an apparatus for judging road surface conditions are disclosed. The method includes the steps of: detecting rotational information of tires; storing the rotational information of the respective tires; calculating a vehicle velocity; calculating an acceleration/deceleration of the vehicle; calculating a slip ratio of left-sided front and rear wheels and right-sided front and rear wheels and a slip ratio of front and rear wheels, respectively; calculating an amount of fluctuation in differences in slip ratios between the right and left wheels; obtaining a linear regression coefficient and a correlation coefficient between the slip ratio of the front and rear wheels and the acceleration/deceleration of the vehicle; and setting a threshold for judging road surface conditions. The method and apparatus allow for road surface conditions to be judged accurately.

Growing community of inventors

Kobe, Japan

Yukio Nakao