A tire position rotation detection device includes an acquisition computer, a first calculation computer, a second calculation computer, and a rotation determination computer. The acquisition computer acquires a rotational speed of each of tires while a vehicle is traveling. The first calculation…
Provided are a method and system for monitoring indirectly a tire pressure applicable to a complex drive working condition. The method includes: S1, obtaining an independent tire speed time stamp signal of each tire of a vehicle, calculating a real-time rolling characteristic of each tire on the…
Die Erfindung betrifft ein Verfahren und ein Vorrichtung zur Bestimmung mindestens eines Fahrbahnkontaktparameters (FKP) eines Fahrzeugs (1), der eine Fahrbahn- und/oder eine Reifeneigenschaft des Fahrzeugs (1) repräsentiert, umfassend: • Festlegen (FK) mindestens eines Kalibrierabschnitts (KA…
Change in a regression formula for correcting a rotation speed is found early. A correction device includes a rotation speed acquisition unit, a comparison value calculation unit, a torque acquisition unit, a regression formula specification unit, a rotation speed correction unit, and a…
An estimation apparatus includes a rotation speed acquisition unit, a driving force acquisition unit, a slip ratio calculation unit, a slope calculation unit, and an estimation unit. The rotation speed acquisition unit sequentially acquires rotation speeds of the tires. The driving force…
A tire radius monitoring system for dynamically determining a tire effective radius for each of the wheels on a vehicle is described. The system includes a GPS sensor, a plurality of wheel speed sensors, and a controller. The controller determines, via the GPS sensor, a velocity vector related to…
A method for obtaining the deformation of a tire casing subjected to a load, rotating at a rotational speed W, comprising: Phase 1—Delimiting the first signal over a whole number of wheel revolutions to construct a first wheel revolution signal; and Determining a reference acceleration; and Phase…
A method for obtaining the deformation of a tire casing subjected to a load, rotating at a rotational speed W, comprises the following steps: acquiring a signal comprising the amplitude of the acceleration in the direction normal to the crown when running at the rotational speed W; delimiting the…
The invention concerns a system and a method for detecting potential damages to tires of motor vehicles due to impacts against/on obstacles.
An apparatus for detecting a decrease in tire pressure based on a resonance frequency of a tire installed in a vehicle. The apparatus includes rotation information detection means for detecting rotation information of the tire, resonance frequency estimate means for estimating the resonance…
A method for detecting a tire having a decreased air pressure based on wheel rotation information to be obtained from the tire attached to a vehicle in which there is a predetermined difference between a front wheel load and a rear wheel load. The method includes a step of acquiring the wheel…
An system for detection of deflated tires based on a resonance frequency of tires with a vehicle and a relative comparison value of rotation speeds of the tires. The system includes: a rotation information detection means for detecting rotation information of the tires; a rotation speed calculation…
A system for detecting deflated tires by making a relative comparison among rotation speeds of tires attached to a vehicle. The system includes a rotation speed information detection means for detecting rotation speed information of the tires; a rotation speed calculation means for calculating…
A system for determining if a tire of a vehicle is improperly inflated. The system includes a radar (145), a wheel speed sensor (125), and a controller (150). The radar (145) is configured to emit a signal generally parallel to a surface the vehicle is traveling on, to detect a reflection of the…
A method of detecting a decrease in tire air pressure based on wheel rotation information obtained from tires attached to a 4-wheel vehicle. The method includes: a step of calculating tire rotation information obtained from the respective wheel tires; a step of computing a first determination value…
A method for detecting a decrease in tire air pressure based on wheel rotation speed information obtained from tires attached to a four-wheel vehicle. The method includes: a wheel rotation speed information detection step for detecting wheel rotation speed information of the respective tires; a…
A method of detecting a tire having a decreased internal pressure by making a relative comparison among wheel speeds of tires attached to the respective wheels. The method includes a step of detecting wheel rotation information regarding the respective tires of the vehicle; a step of calculating…
An apparatus for detecting a decrease in air pressure of a tire attached to a vehicle. The apparatus includes a rotation speed detection means for periodically detecting rotation speeds of tires of respective wheels of the vehicle; a rotation wheel speed ratio calculation means for calculating…
An apparatus includes an acceleration calculation means for calculating, based on rotation speed information obtained from a rotation speed detection means, accelerations of the respective tires; an acceleration variation calculation means for calculating acceleration variations of the tires; a…
An apparatus for detecting a decrease in a tire air pressure includes: a rotation information detection means for periodically detecting tire rotation information regarding the respective wheels of a four-wheel vehicle; a wheel speed calculation means for calculating tire wheel speeds based on the…
A method for detecting a tire having a decreased internal pressure by making a relative comparison of wheel speeds of tires. The method includes a step of detecting wheel rotation information of the respective tires of the vehicle; a step of calculating wheel speeds based on the detected wheel…
The detection appatatus includes means for detecting rotation speed information of the respective wheels of a vehicle; means for estimating, a frequency characteristic of the wheel rotation speed information; and means for determining, based on the estimated frequency characteristic, a tire having…
To provide a device for detecting whether heterogeneous tires are mounted on the respective left and right driving wheels or not and accurately detecting the decreased tire pressures. The detection device of heterogeneous tires of the present invention is equipped with a means for detecting the…
The method for judging the load distribution of a vehicle is characterized in that the load distribution of a vehicle is judged by comparing the result of comparing the calculation value of the rotational speeds of wheels in predetermined two combinations of wheels with the result of comparing the…
To provide a judging method of loading condition of a vehicle and a tire deflation warning system capable of preventing alarming four-wheel diffusion for a vehicle with heavy load. The judging method of vehicle loading condition including the steps of detecting rotational speeds of wheels mounted…
A tire deflation warning system (10) having a means (2) for detecting the rotational speeds of wheels on a vehicle and a means for judging tires with reduced air pressure from the rotational speed information of the wheels including a means (1) for judging whether driving force works to respective…
A tire deflation warning system, including a means for detecting a rotational velocity of a wheel attached to a vehicle and a means for judging a tire pneumatic pressure drop by determining a reduced pressure judging value that judges the tire pneumatic pressure drop made of difference of…
The method for the determining of tire inflation pressure fluctuations on vehicles entails determining deviations of wheel radii ratios from an established reference value, multiply determining the tire inflation pressure fluctuations at all wheel positions with a number of deviations which is…
A tire deflation detection system for determining loss of air pressure in a tire through comparing a determination value, which determines the loss of air pressure in the tire based on information of wheel speed of a vehicle, with a threshold value, wherein a determination threshold value for…
A method for warning deflation of tires which can detect the deflation of 2 wheels at the same axle including a following axle, the simultaneous deflation of 4 wheels or the abrasion of tires only by the information of wheel speeds is provided. The method comprises the steps of: detecting the…