WO2007142101A1 - タイヤ空気圧低下警報方法 - Google Patents
タイヤ空気圧低下警報方法 Download PDFInfo
- Publication number
- WO2007142101A1 WO2007142101A1 PCT/JP2007/061019 JP2007061019W WO2007142101A1 WO 2007142101 A1 WO2007142101 A1 WO 2007142101A1 JP 2007061019 W JP2007061019 W JP 2007061019W WO 2007142101 A1 WO2007142101 A1 WO 2007142101A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- tire
- vehicle acceleration
- regression coefficient
- vehicle
- slip ratio
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
- B60C23/02—Signalling devices actuated by tyre pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
- B60C23/02—Signalling devices actuated by tyre pressure
- B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
- B60C23/0408—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
- B60C23/041—Means for supplying power to the signal- transmitting means on the wheel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
- B60C23/02—Signalling devices actuated by tyre pressure
- B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
- B60C23/0408—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
- B60C23/0415—Automatically identifying wheel mounted units, e.g. after replacement or exchange of wheels
- B60C23/0416—Automatically identifying wheel mounted units, e.g. after replacement or exchange of wheels allocating a corresponding wheel position on vehicle, e.g. front/left or rear/right
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
- B60C23/02—Signalling devices actuated by tyre pressure
- B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
- B60C23/0408—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
- B60C23/0471—System initialisation, e.g. upload or calibration of operating parameters
- B60C23/0472—System initialisation, e.g. upload or calibration of operating parameters to manually allocate ID codes or mounting positions, e.g. by service technicians
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
- B60C23/02—Signalling devices actuated by tyre pressure
- B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
- B60C23/0408—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
- B60C23/0474—Measurement control, e.g. setting measurement rate or calibrating of sensors; Further processing of measured values, e.g. filtering, compensating or slope monitoring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
- B60C23/02—Signalling devices actuated by tyre pressure
- B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
- B60C23/0486—Signalling devices actuated by tyre pressure mounted on the wheel or tyre comprising additional sensors in the wheel or tyre mounted monitoring device, e.g. movement sensors, microphones or earth magnetic field sensors
- B60C23/0488—Movement sensor, e.g. for sensing angular speed, acceleration or centripetal force
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
- B60C23/06—Signalling devices actuated by deformation of the tyre, e.g. tyre mounted deformation sensors or indirect determination of tyre deformation based on wheel speed, wheel-centre to ground distance or inclination of wheel axle
- B60C23/061—Signalling devices actuated by deformation of the tyre, e.g. tyre mounted deformation sensors or indirect determination of tyre deformation based on wheel speed, wheel-centre to ground distance or inclination of wheel axle by monitoring wheel speed
Definitions
- the present invention relates to a tire pressure drop warning method and apparatus, and a tire decompression determination program. More specifically, the present invention relates to a tire pressure drop warning method and apparatus that can improve the performance and safety of a vehicle by detecting a tire pressure drop using tire rotation information, and a tire decompression determination program.
- the present invention can reduce the number of calculations for obtaining a linear regression line of slip ratio and acceleration, and can accurately detect a decrease in tire internal pressure even when the road surface condition is not constant.
- the purpose is to provide.
- the present invention includes a step of detecting rotation information obtained from tires mounted on a vehicle, a step of calculating wheel speed, vehicle acceleration, and front and rear wheel slip ratios from the rotation information of the respective tires, vehicle acceleration And a step of accumulating the slip ratio of the front and rear wheels, a step of obtaining a first-order regression coefficient between the vehicle acceleration and the slip ratio of the front and rear wheels, and the step when the first-order regression coefficient and the reference internal pressure of the tire in advance By comparing with the reference value of the first-order regression coefficient calculated by the A method for alarming a decrease in air pressure, wherein when the accumulated slip rate and vehicle acceleration sample data continuously change with a change amount within a certain range, one or more points near the start point of the sampler data detector. And a tire air pressure drop warning method for calculating the first-order regression coefficient based on an average value of 1 and two or more sample data near the end point.
- the method includes a step of detecting the absolute speed of the vehicle, and the vehicle acceleration is calculated from the absolute speed.
- the present invention provides means for detecting rotation information obtained from tires mounted on a vehicle, means for calculating wheel speed, vehicle acceleration, and front and rear wheel slip ratios from the rotation information of each tire, vehicle acceleration and Means for accumulating the slip ratio of the front and rear wheels, means for obtaining a first-order regression coefficient of the vehicle acceleration and the slip ratio of the front and rear wheels, and the first-order regression coefficient and calculated in advance by the means at the time of the reference internal pressure of the tire
- a tire air pressure drop warning device including means for determining whether or not the tire is depressurized by comparing with a reference value of a first-order regression coefficient, wherein the accumulated slip ratio and vehicle acceleration are When sample data changes continuously within a certain range, the average value of one or more points near the start point of the sample data and one point near the end point Relates tire deflation warning device for calculating the first-order regression coefficient based on the average value of the sample data of two points or more.
- the present invention provides a computer for detecting rotation information obtained from tires mounted on a vehicle, and calculating wheel speed, vehicle acceleration, and front and rear wheel slip ratios from the rotation information of each tire.
- a procedure for accumulating vehicle acceleration and front and rear wheel slip ratios, a procedure for obtaining a linear regression coefficient of the vehicle acceleration and front and rear wheel slip ratios, and the primary regression coefficient and the tire reference internal pressure in advance A tire pressure drop warning program for executing a procedure for determining whether or not a tire is depressurized by comparing with a reference value of a first-order regression coefficient calculated by the procedure, Pickpocket When sample data of the head ratio and vehicle acceleration change continuously within a certain range, the average value of one or more points near the start point of the sample data and one point near the end point or The present invention relates to a tire pressure drop warning program for calculating the first-order regression coefficient based on an average value of two or more points of Sampnore.
- FIG. 1 is a block diagram showing an embodiment of a tire pressure drop alarm device of the present invention.
- FIG. 2 is a block diagram showing an electrical configuration of the tire pressure drop alarm device in FIG.
- FIG. 3 is a view showing a flowchart of a tire pressure drop alarm program according to the present invention.
- FIG. 4 is a schematic diagram of a linear regression line representing the slipperiness of a tire with respect to the road surface.
- FIG. 5 is a diagram showing a primary regression line in Example 1 (a).
- (B) It is a figure which shows the linear regression line in Example 2.
- FIG. 5 is a diagram showing a primary regression line in Example 1 (a).
- (B) It is a figure which shows the linear regression line in Example 2.
- FIG. 5 is a diagram showing a primary regression line in Example 1 (a).
- (B) It is a figure which shows the linear regression line in Example 2.
- the tire pressure drop alarm device includes four tires FL, FR, RL and RR (hereinafter collectively referred to as Wi-Fi) provided in a four-wheel vehicle.
- Wi-Fi Wi-Fi
- i 1-4
- 1 front left tire
- 2 front right tire
- 3 rear left tire
- 4 rear right tire
- the rotation information detecting means 1 a wheel speed sensor or the like that generates a rotation pulse using an electromagnetic pickup or the like and measures the wheel speed (rotation speed) of the rotation speed information from the number of pulses is used. Can do.
- the output of the rotation information detecting means 1 is given to a control unit 2 which is a computer such as ABS.
- the control unit 2 has an internal pressure drop alarm 3 composed of a liquid crystal display element, plasma display element, CRT, etc. to notify when the air pressure has dropped, the reference internal pressure of the tire (normal air pressure)
- the initialization switch 4 that is operated by the driver when adjusted to is connected.
- the initialization switch 4 is operated when the tire is changed or adjusted to normal internal pressure. This resets the reference value that has been held so far, and sets a new reference value.
- the control unit 2 includes an I / O interface 2a necessary for passing signals to and from an external device, a CPU 2b that functions as a center of arithmetic processing, and a control operation program for the CPU 2b.
- the CPU 2b performs a control operation, the data is temporarily written or the RAM 2d from which the written data is read is configured.
- the vehicle acceleration and the slip ratio are obtained based on the wheel speeds of the four wheel tires. From the change over time in the first-order regression coefficient, it is possible to determine the simultaneous decompression of one drive wheel tire or left and right drive wheel tires. In addition, even if the driven wheel tire is depressurized, the primary regression coefficient does not change, so it is not possible to determine the depressurization. In other words, if the drive wheel tire does not depressurize, tire depressurization cannot be detected. Therefore, it can be determined whether at least the drive wheel tire is depressurized.
- decompression of one driving wheel tire, simultaneous decompression of left and right driving wheel tires, decompression of one driving wheel tire and driven wheel tire, decompression of left and right driven wheel tires and driving wheel tire, one driven wheel tire and left and right tires Can determine the decompression of drive wheel tires and simultaneous decompression of four-wheel tires.
- the detection accuracy is reduced when the tire group including only one driving wheel and only one driving wheel is decompressed. For this reason, it is preferable to determine whether or not two or more tires including left and right drive wheel tires have been decompressed simultaneously.
- the tire pressure drop alarm device is used in combination with the conventional device that detects the decrease in internal pressure by relatively comparing the rotation information of the tire. Can be improved.
- the rotation information detecting means 1 for detecting the rotation information of each tire Wi, and the wheel speed, the vehicle acceleration, and the slip ratio of the front and rear wheels from the rotation information of each tire Wi, respectively.
- Second calculation processing means for calculating, storage means for storing vehicle acceleration and front and rear wheel slip ratios, third calculation processing means for obtaining mutual linear regression coefficients of vehicle acceleration and front and rear wheel slip ratios, By comparing the first-order regression coefficient with the reference value of the first-order regression coefficient that was calculated in advance at the reference internal pressure of the tire, at least the drive wheel tire is depressurized.
- the pressure reduction determination means for determining whether or not the pressure is being reduced, and the internal pressure reduction alarm device 3 that issues a warning of a decrease in the air pressure of the tire based on the result of the pressure reduction determination.
- the tire decompression determination program uses the control unit 2 to calculate wheel speed, vehicle acceleration, and front and rear wheel slip ratios from tire rotation information, respectively.
- Storage means for accumulating vehicle acceleration and front and rear wheel slip ratios, third arithmetic processing means for obtaining mutual primary regression coefficients of vehicle acceleration and front and rear wheel slip ratios, and the primary regression coefficients and tire
- a depressurization determining means for determining at least whether or not the drive wheel tire is depressurized.
- the absolute speed of the vehicle detected by a GPS device is used, and the acceleration of the vehicle is calculated from the absolute speed.
- the GPS device for example, V BOX (trade name) manufactured by RACELOGIC can be used.
- This VBOX employs a Kinematic GPS positioning method that uses the phase difference of the carrier wave of the satellite radio wave, so the position can be identified with high accuracy. It is more preferable for the GPS device to be able to calculate the vehicle speed with high accuracy using the Doppler effect of the carrier wave.
- Step S3 the obtained vehicle acceleration and slip ratio are accumulated (Step S4).
- a calculation is performed to determine the continuity of changes in the sample data of the slip ratio and vehicle acceleration accumulated from the previous sample (trend investigation preparation step S5).
- step S7 Preparation for continuity judgment
- step S8 continuity determination
- step 7 the continuous count is counted up and the process returns (corresponding to continuity determination preparation step S7).
- step 8 if the continuous count is equal to or greater than the threshold value, it is determined that there is continuity, the continuous count is cleared, and the process proceeds to step S9. If the continuous count is less than the threshold value, the continuous count is cleared (corresponding to continuity judgment step S8).
- the first-order regression coefficient of the vehicle acceleration and the slip ratio (regression coefficient of the slip ratio of the front and rear wheels with respect to the vehicle acceleration) K1 is obtained (the specific method will be described later) (step S9) .
- This primary regression coefficient (hereinafter also simply referred to as the regression coefficient) K1 is the relationship between the vehicle acceleration and the slip ratio, and this regression coefficient K1 is used as the internal pressure judgment value.
- a predetermined number N for example, 20
- a regression coefficient determination is obtained as an average value (step Sl 1).
- the regression coefficient of the slip ratio with respect to the vehicle acceleration is averaged by a predetermined number and the regression coefficient at the reference internal pressure of the tire (reference value) STL And the determination [IV and STL are compared (step S12).
- Judgment V If the ratio of V to the internal pressure reference value STL (CJV / STL) is a threshold value, for example, 1.4 or more, the driver is warned that the internal pressure has dropped. Note that the threshold is set in advance for each vehicle.
- the wheel speeds (VI, V2, V3, V4) are calculated from the rotational speeds of the four-wheel tires FL, FR, RL, and RR of the vehicle.
- wheel speed data at a certain point of each wheel tire FL, FR, RL, RR of a vehicle obtained from a sensor such as an ABS sensor is set as wheel speeds VI, V2, V3, V4.
- Vd (VI + V2) / 2
- the vehicle acceleration that is, the average wheel acceleration / deceleration of the driven wheel
- Af the vehicle acceleration
- At is the time interval between the wheel speeds Vf and Vf calculated from the wheel speed data (sample
- g is the gravitational acceleration.
- the absolute speed of the vehicle may be detected using a GPS device or the like, and the vehicle acceleration may be calculated from the absolute speed.
- the change from the previous sample to the latest sample is ⁇ 1
- the change from the second previous sample to the previous sample is ⁇ 2
- each has an X-axis direction and a y-axis direction.
- ⁇ 1 ⁇ , ⁇ ⁇ , ⁇ 2 ⁇ , A 2y (equivalent to the trend adjustment preparation step S5)
- ⁇ lx and ⁇ 2x have the same sign
- ⁇ ly and ⁇ 2y are positive / negative If the signs are the same, it is determined that the two changes have the same tendency, and the process proceeds to step S7 (preparation for continuity determination). If the above condition is not satisfied, it is determined that the same tendency is not found, and the process proceeds to step S8 (continuity determination) (corresponding to trend determination step S6).
- step S7 the continuous count is counted up and the process returns (corresponding to continuity determination preparation step S7).
- step S7 if the continuous count is equal to or greater than the threshold value, it is determined that there is continuity, the continuous count is cleared, and the process proceeds to step S5. If the continuous count is less than the threshold value, the continuous count is cleared (corresponding to continuity judgment step S8).
- step (7) the primary regression coefficients of the slip ratio and the vehicle acceleration are calculated by the following method.
- the straight line connecting the sampling start point (point group) and end point (point group) is taken as the primary regression line.
- the “point cloud” is used because the accuracy of the regression depends on the detection accuracy of the sampling start point and end point. For example, a total of three points including the start point and two points before and after (time) Using the average coordinates as the starting point, the regression accuracy can be improved.
- the straight line connecting the start point and end point shall be the primary regression line. Can do.
- the amount of change of each sample is obtained, and it is determined how long the samples having the same tendency are continuous. For example, the latest sample from the previous sample The change up to the pull is ⁇ 1, the change from the previous sample to the previous sample is ⁇ 2, and the X-axis direction and y-axis direction are taken into account, and expressed as ⁇ 1 ⁇ , Aly ⁇ 2x, and A2y, respectively. Then, the signs of ⁇ and ⁇ 2x and the signs of ⁇ ly and ⁇ 2y are determined. If both are the same, it is determined that the two changes are continuous (they have the same tendency). it can. In addition, the sign of ⁇ and Aly may be the same.
- ⁇ and ⁇ 2 ⁇ In order to increase the reliability of the results, it is only necessary to set certain limits on the magnitudes of ⁇ and ⁇ 2 ⁇ , and the magnitudes of Aly and A2y, which can be adjusted only by positive and negative signs, and adjust the limits. For example, a certain threshold value is set, and only when each change amount is equal to or greater than (or equal to or less than) the threshold value, it may be adopted as a sample.
- the slope of a linear regression line is calculated from (x, y) of 10 consecutive samples that change with the same tendency.
- the slope of the linear regression line is calculated from the sum of X, the sum of y, the sum of squares of X, the sum of squares of y, and the product of x and y according to the following formula (7). .
- the sum is 9 times, X and y are total 18 times, the sum of squares is 10 times, the multiplication is 10 times, the sum is 9 times, 19 times, X and y are 38 times,
- a total of 19 operations are required, with 10 products and 9 sums, for a total of 75 operations (45 additions, 30 multiplications).
- the slope of the linear regression line is obtained from the coordinates of the start point (point group) and end point (point group).
- the start point coordinates are (xl, yl)
- the end point coordinates are (x2, y2)
- the start point is determined by the average coordinates of the start point group 3 points
- the end point is the end point group 3 points
- the start point Determining the X coordinate of a point requires two additions, one division, and 12 X and Y coordinates for the start and end points.
- the slope is obtained by (y2—yl) ⁇ (x2—xl), 2 subtractions, 1 division, and 15 operations are required (8 additions, 2 subtractions, 5 divisions) .
- the number of samples that do not need to be fixed is particularly large, and the size of the sampling start point (point group) and sampling end point (point group) in the X-axis direction and y-axis direction Decide as a guide (for example, 7 or more).
- the road surface on which two regression lines as shown in Fig. 4 are obtained is divided into half during the sampling time, for example, 5 seconds on asphalt and 5 seconds on ice if the sampling time is 10 seconds.
- the linear regression line obtained from the sampling data is the average of a (asphalt) and b (ice) (dotted line c in Fig. 4).
- the method of the present invention provides separate regression lines on ice and asphalt. By calculating the average value for each regression line obtained, the accuracy of the regression calculation results is not inferior.
- the average value of the sample data 1 to 3 was set as the start point, the sample data 8 to 10 was set as the end point, and an equation of a straight line connecting the start point and the end point was obtained.
- the average value of the sample data 11 to 13 was set as the start point, the sample data 18 to 20 was set as the end point, and a straight line connecting the start point and the end point was obtained.
- the equation of the linear regression line was obtained using the method of least squares. The results are shown in Fig. 5 (a).
- coefficient C is a value obtained by estimating coefficient A force coefficient B using a linear regression coefficient obtained by the method of least squares
- error D is the difference between coefficient B and coefficient C.
- the coefficient C ′ is a value obtained by estimating the coefficient A force coefficient B using the linear regression coefficient obtained by the method of the present invention
- the error D ′ is the difference between the coefficient B and the coefficient C ′.
- Example 2 when the amount of change of each sample data (corresponding to vehicle acceleration and slip ratio) does not change much in the data of the fixed Sampnore number, The method showed no difference in accuracy compared with the conventional least square method.
- Example 3 when the amount of change of each sample data (corresponding to vehicle acceleration and slip ratio) does not change much in the data of the fixed Sampnore number, The method showed no difference in accuracy compared with the conventional least square method.
- Example 2 there is an opportunity to determine that there is no continuity between the two groups of data.
- Table 2 When the data group in Table 2 is divided into two gnolees and separate regression lines are not calculated simultaneously, when continuity is determined, it is determined by the data group that has been determined to be continuous (Table 2)
- the regression line calculation for the 1st to 10th data sets was executed with the continuity between 10th and 11th as a trigger).
- the number of calculations can be reduced as compared with the conventional linear regression calculation, and even if the road surface condition is not constant. It is possible to detect a decrease in tire internal pressure with high accuracy.
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- Measuring Fluid Pressure (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/300,749 US8040229B2 (en) | 2006-05-31 | 2007-05-30 | Method for alarming decrease in tire air-pressure using wheel speed, vehicle acceleration and wheel slip ratio |
EP07744432A EP2022652B1 (en) | 2006-05-31 | 2007-05-30 | Lowered tire air pressure alarming method |
CN2007800188131A CN101448660B (zh) | 2006-05-31 | 2007-05-30 | 轮胎气压下降警报方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2006151819 | 2006-05-31 | ||
JP2006-151819 | 2006-05-31 |
Publications (1)
Publication Number | Publication Date |
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WO2007142101A1 true WO2007142101A1 (ja) | 2007-12-13 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2007/061019 WO2007142101A1 (ja) | 2006-05-31 | 2007-05-30 | タイヤ空気圧低下警報方法 |
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Country | Link |
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US (1) | US8040229B2 (ja) |
EP (1) | EP2022652B1 (ja) |
KR (1) | KR101004654B1 (ja) |
CN (1) | CN101448660B (ja) |
WO (1) | WO2007142101A1 (ja) |
Families Citing this family (3)
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JP4764913B2 (ja) * | 2008-12-01 | 2011-09-07 | 住友ゴム工業株式会社 | タイヤ空気圧低下検出装置および方法、ならびにタイヤの空気圧低下検出プログラム |
USD901524S1 (en) | 2018-03-06 | 2020-11-10 | Samsung Electronics Co., Ltd. | Display screen or portion thereof with transitional graphical user interface |
CN109177663B (zh) * | 2018-11-02 | 2023-09-08 | 重庆栋能科技股份有限公司 | 一种直接式汽车轮胎压力监测系统及其方法 |
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EP1215096B1 (en) | 2000-12-14 | 2011-04-06 | Sumitomo Rubber Industries, Ltd. | Apparatus and method for identifying tires and apparatus and method for evaluating road surface conditions |
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JP2004017717A (ja) | 2002-06-13 | 2004-01-22 | Sumitomo Rubber Ind Ltd | タイヤ空気圧低下検出方法および装置、ならびにタイヤ減圧判定のプログラム |
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JP4086763B2 (ja) | 2003-11-25 | 2008-05-14 | 住友ゴム工業株式会社 | タイヤ空気圧低下検出方法および装置、ならびにタイヤ減圧判定のプログラム |
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2007
- 2007-05-30 KR KR1020087029094A patent/KR101004654B1/ko not_active IP Right Cessation
- 2007-05-30 EP EP07744432A patent/EP2022652B1/en not_active Ceased
- 2007-05-30 CN CN2007800188131A patent/CN101448660B/zh not_active Expired - Fee Related
- 2007-05-30 WO PCT/JP2007/061019 patent/WO2007142101A1/ja active Application Filing
- 2007-05-30 US US12/300,749 patent/US8040229B2/en not_active Expired - Fee Related
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
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US5561415A (en) * | 1994-01-14 | 1996-10-01 | Continental Aktiengesellschaft | Method and device for determining filling pressure loss of a pneumatic vehicle tire |
JPH09104209A (ja) * | 1995-10-11 | 1997-04-22 | Honda Motor Co Ltd | 車両の車輪減圧判定装置 |
JPH09104210A (ja) * | 1995-10-11 | 1997-04-22 | Honda Motor Co Ltd | 車両の車輪減圧判定装置 |
JP2002059724A (ja) * | 2000-06-26 | 2002-02-26 | Robert Bosch Corp | 自動車の減圧したタイヤを検出するための方法 |
JP2003211925A (ja) | 2002-01-23 | 2003-07-30 | Sumitomo Rubber Ind Ltd | タイヤ空気圧低下警報方法および装置、ならびにタイヤ減圧判定のプログラム |
US20030156023A1 (en) | 2002-01-23 | 2003-08-21 | Hiroaki Kawasaki | Method and apparatus for alarming decrease in tire air-pressure, and program for judging decompression of tire |
JP2005225428A (ja) * | 2004-02-16 | 2005-08-25 | Sumitomo Rubber Ind Ltd | タイヤ空気圧低下警報方法および装置、ならびにタイヤ減圧判定のプログラム |
Non-Patent Citations (1)
Title |
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See also references of EP2022652A4 * |
Also Published As
Publication number | Publication date |
---|---|
US20090128316A1 (en) | 2009-05-21 |
CN101448660B (zh) | 2010-12-01 |
KR101004654B1 (ko) | 2011-01-04 |
US8040229B2 (en) | 2011-10-18 |
EP2022652A4 (en) | 2011-03-23 |
CN101448660A (zh) | 2009-06-03 |
EP2022652B1 (en) | 2012-04-18 |
EP2022652A1 (en) | 2009-02-11 |
KR20090013810A (ko) | 2009-02-05 |
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