WO2013133308A1 - Dispositif de contrôle de pression d'air de pneu - Google Patents

Dispositif de contrôle de pression d'air de pneu Download PDF

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Publication number
WO2013133308A1
WO2013133308A1 PCT/JP2013/056095 JP2013056095W WO2013133308A1 WO 2013133308 A1 WO2013133308 A1 WO 2013133308A1 JP 2013056095 W JP2013056095 W JP 2013056095W WO 2013133308 A1 WO2013133308 A1 WO 2013133308A1
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WO
WIPO (PCT)
Prior art keywords
tire
air pressure
wheel
warning lamp
pressure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2013/056095
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English (en)
Japanese (ja)
Inventor
寺田　昌司
一夫 坂口
崇 島
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Publication of WO2013133308A1 publication Critical patent/WO2013133308A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
    • B60C23/0401—Signalling devices actuated by tyre pressure mounted on the wheel or tyre characterised by the type of alarm
    • 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
    • B60C23/0476—Temperature compensation of measured pressure values
    • 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
    • B60C23/0477—Evaluating waveform of pressure readings

Definitions

  • the present invention relates to a tire pressure monitoring device.
  • Patent Document 1 discloses a technology that, when the tire air pressure is reduced by a predetermined percentage from the recommended air pressure, turns on a warning lamp to prompt the driver to travel at the recommended air pressure.
  • An object of the present invention is a tire capable of preventing a warning lamp from being lit in a tire location when an appropriate pressure adjustment is performed after tire rotation in a front / rear differential pressure vehicle having different recommended tire pressures for front and rear wheels.
  • the object is to provide a pneumatic monitoring device.
  • the warning lamp is turned off when the vehicle is stopped, and the warning lamp is turned off when there is even one wheel whose air amount has increased compared to when the vehicle is stopped. Continue.
  • the warning lamp is turned off when the vehicle is stopped and the tire air volume is increasing even if one wheel is increasing, it is highly likely that the air pressure was adjusted after the tire rotation. In this case, the warning lamp is turned off. By continuing the operation, it is possible to prevent the warning lamp from being turned on during the tire location.
  • FIG. 1 is a configuration diagram of a tire air pressure monitoring device of Example 1.
  • FIG. 1 is a configuration diagram of a TPMS sensor 2 of Example 1.
  • FIG. It is a flowchart which shows the flow of the warning lamp incorrect lighting prevention control process implemented by TPMSCU4 of Example 1.
  • FIG. It is explanatory drawing which shows the incorrect lighting prevention effect of the warning lamp 6 of Example 1.
  • FIG. 1 is a configuration diagram of a tire air pressure monitoring device of Example 1.
  • FIG. 1 is a configuration diagram of a TPMS sensor 2 of Example 1.
  • FIG. It is a flowchart which shows the flow of the warning lamp incorrect lighting prevention control process implemented by TPMSCU4 of Example 1.
  • FIG. It is explanatory drawing which shows the incorrect lighting prevention effect of the warning lamp 6 of Example 1.
  • FIG. 1 is a configuration diagram of a tire pressure monitoring apparatus according to the first embodiment.
  • FL at the end of each symbol indicates a left front wheel
  • FR indicates a right front wheel
  • RL indicates a left rear wheel
  • RR indicates a right rear wheel.
  • the description of FL, FR, RL, and RR is omitted when there is no need to explain them individually.
  • the tire pressure monitoring device of the first embodiment includes a TPMS (Tire Pressure Monitoring System) sensor 2, a receiver 3, a TPMS control unit (TPMSCU) 4, a display 5, a warning lamp 6, a wheel speed sensor 7, Is provided.
  • the TPMS sensor 2 is attached to each wheel 1, and the receiver 3, the TPMSCU 4, the display 5, the warning lamp 6, and the wheel speed sensor are provided on the vehicle body side.
  • the TPMS sensor 2 is attached to an air valve (not shown) position of the tire.
  • FIG. 2 is a configuration diagram of the TPMS sensor 2 according to the first embodiment.
  • the TPMS sensor 2 includes a pressure sensor (air pressure detection means) 2a, a temperature sensor (temperature detection means) 2b, an acceleration switch (G switch) 2c, a sensor control unit (sensor CU) 2d, a transmitter 2e, a button A battery 2f.
  • the pressure sensor 2a detects tire air pressure [kPa].
  • the temperature sensor 2b detects the temperature [° C.] of the air in the tire.
  • the G switch 2c is a switch that is turned off when the centrifugal acceleration [g] acting on the tire is less than a predetermined value, and turned on when the acceleration is greater than or equal to a predetermined value.
  • the sensor CU2d is operated by electric power from the button battery 2f, and includes a tire pressure information detected by the pressure sensor 2a, a temperature information in the tire detected by the temperature sensor 2b, and a TPMS including a sensor ID (identification information). Data is transmitted from the transmitter 2e by radio signal.
  • Sensor CU2d uses G switch 2c ON / OFF as a trigger, stops transmission of TPMS data in extremely low vehicle speed range (G switch OFF) including stopping, and TPMS data in higher vehicle speed range (G switch ON) Are transmitted at a predetermined interval (for example, every one minute).
  • the receiver 3 receives and decodes the radio signal output from each TPMS sensor 2, and outputs it to the TPMSCU 4.
  • TPMSCU4 reads each TPMS data, refers to the correspondence between each sensor ID and each wheel position stored in advance in the internal memory from the sensor ID of the TPMS data, and corresponds to which wheel position the TPMS data corresponds to
  • the tire pressure contained in the TPMS data is displayed on the display 5 as the corresponding wheel position air pressure. Further, when the tire air pressure decreases by a predetermined ratio (for example, 20%) or more with respect to the recommended air pressure, the TPMSCU 4 turns on the warning lamp 6 to warn of a decrease in the air pressure and prompts the driver to travel at the appropriate air pressure.
  • the placard pressure of the front wheels is set to 500 [kPa]
  • the recommended air pressure of the rear wheels is set to 300 [kPa].
  • the wheel speed sensor 7 is provided corresponding to each wheel, detects the wheel speed of the corresponding wheel, and outputs a wheel speed pulse corresponding to the wheel speed.
  • TPMSCU4 calculates the traveling speed (vehicle speed) of the vehicle from each wheel speed pulse.
  • Example 1 in order to register the correspondence between each sensor ID and each wheel position after tire rotation by storing and updating in the memory 9, if there is a possibility that tire rotation has been performed, the TPMSCU4 side Autolocation is performed to determine which wheel each TPMS sensor 2 belongs to.
  • the TPMSCU 4 determines that the tire rotation may have been performed when the elapsed time from the ignition switch OFF to the ON is equal to or longer than a predetermined time (for example, 15 minutes). TPMSCU4 monitors the tire air pressure of each wheel 1 based on the air pressure information of TPMS data transmitted from each TPMS sensor 2 when the elapsed time from the ignition switch OFF to ON is less than the predetermined time. Is implemented. On the other hand, when the elapsed time from the ignition switch to the ON is equal to or longer than the predetermined time, the “auto location mode” for determining the wheel position of each TPMS sensor 2 is performed. The auto location mode is performed until the wheel positions of all the TPMS sensors 2 are determined.
  • a predetermined time for example, 15 minutes.
  • the monitor mode is entered.
  • a known method such as a method for determining using the strength (radio wave strength, electric field strength) of a radio signal from each TPMS sensor 2 can be used.
  • the tire pressure can be monitored from the air pressure information included in the TPMS data. Based on the relationship, the display 5 displays the air pressure and the warning lamp 6 warns of a decrease in air pressure. At this time, in order to prevent the warning lamp 6 from being turned on erroneously, the TPMSCU 4 of Example 1 is in an auto-location from the monitor mode in spite of the proper air pressure adjustment after the tire rotation. When the mode is changed, the warning lamp erroneous lighting prevention control as shown below is performed. In order to realize the warning lamp erroneous lighting prevention control, the TPMSCU 4 stores the lighting state of the warning lamp 6 and the tire air pressure of each wheel and the air temperature in the tire received in the internal memory every time the vehicle stops. .
  • FIG. 3 is a flowchart showing the flow of a warning lamp erroneous lighting prevention control process performed by the TPMSCU 4 of the first embodiment.
  • step S1 each TPMS data is input, and the tire pressure of each wheel and the air temperature in the tire are read.
  • the front wheel tire pressure is the front wheel warning threshold (front wheel side threshold, recommended front wheel pressure x 80%) 400 [kPA] or less, or the rear wheel tire pressure is the rear wheel warning threshold (rear It is determined whether or not the wheel side threshold value is the rear wheel recommended air pressure ⁇ 80%) 240 [kPA]. If YES, the process proceeds to step S3, and if NO, the process proceeds to step S7.
  • Step S2 corresponds to first abnormality determination means. In step S3, it is determined whether or not the warning lamp 6 is extinguished when the vehicle is stopped. If YES, the process proceeds to step S4, and if NO, the process proceeds to step S8.
  • step S4 the air amount Q 0 when the vehicle is stopped and the current air amount Q are calculated, and it is determined whether or not there is a wheel whose air amount has increased since the vehicle stopped. If YES, the process proceeds to step S5. If NO, the process proceeds to step S8.
  • the amount of air can be obtained by dividing the tire air pressure by the air temperature in the tire.
  • Step S4 corresponds to air amount calculation means.
  • Steps S3 and S4 correspond to second abnormality determination means.
  • step S5 it is determined whether or not there is at least one wheel below the warning threshold (recommended air pressure x 80%) 240 [kPa] of the tire pressure of each wheel. If YES, the process proceeds to step S8. If NO, the process proceeds to step S6.
  • Step S5 corresponds to third abnormality determination means.
  • step S6 it is determined whether there are three or more wheels of the tire pressure of each wheel that are below the warning threshold 400 [kPa] for the front wheels. If YES, the process proceeds to step S8. If NO, the process proceeds to step S7. move on.
  • Step S6 corresponds to fourth abnormality determination means. In step S7, the warning lamp 6 is turned off. In step S8, the warning lamp 6 is turned on.
  • the vehicle of the first embodiment is a front / rear differential pressure vehicle in which the recommended air pressure of the front and rear wheels is set to 500 [kPa] and the recommended air pressure of the rear wheels is set to 300 [kPa].
  • the warning threshold (recommended air pressure x 80%) is 400 [kPa]
  • the warning threshold for the rear wheels is 240 [kPa].
  • the sensor IDs of the TPMS sensors 2 of the left front wheel 1FL, the right front wheel 1FR, the left rear wheel 1RL, and the right rear wheel 1RR before tire rotation are A, B, C, and D.
  • the tire pressure before tire rotation is the recommended air pressure
  • the tire pressure of the left and right front wheels is insufficient for the recommended air pressure of 200 [kPa]
  • the driver adjusts each tire air pressure so that it becomes the recommended air pressure (FIG. 4B).
  • the warning lamp is turned on until the correspondence between each sensor ID and the wheel position is updated by autolocation. Since the driver adjusts each tire pressure to the recommended pressure, lighting of the warning lamp gives the driver a feeling of strangeness.
  • Example 1 it is determined in step S3 that the warning lamp is turned off when the vehicle is stopped, and in step S4, it is determined that there is even one wheel whose air amount Q has increased compared to when the vehicle is stopped. In this case, the warning lamp 6 remains off regardless of the determination result of step S2. In other words, when the warning lamp 6 is turned off when the vehicle is stopped and the tire air amount Q is increasing even in one wheel, there is a high possibility that the air pressure has been adjusted after the tire rotation. By continuing the extinguishing state of the lamp 6, it is possible to prevent the warning lamp 6 from being lit during the tire location. Therefore, in the case of FIG.
  • the warning lamp 6 when the warning lamp 6 is lit when the vehicle is stopped, the warning lamp 6 is lit. In this case, the driver recognizes a decrease in the air pressure, so that the driver does not feel uncomfortable. Even if the warning lamp 6 is lit when the vehicle is stopped, if the warning lamp 6 is not lit when the tire air volume Q is increased even with one wheel, the warning lamp will be displayed before the vehicle stops. Even if 6 is lit and the driver does not adjust the air pressure appropriately for the warning after the vehicle stops, the warning lamp 6 will not light during the tire location. You will not be able to encourage driving on the road.
  • the warning lamp is displayed during the tire location when appropriate measures are not taken when the vehicle is stopped against a decrease in air pressure that occurred before the vehicle stopped. 6 can be prevented from turning off, and the driver can be continuously urged to run at the recommended air pressure.
  • the warning lamp 6 when it is determined in step S5 that one or more wheels are below the warning threshold value 240 [kPa] of the rear wheels among the tire air pressures of the respective wheels, the warning lamp 6 is used regardless of the determination result in step S4. Lights up. If the tire pressure is adjusted properly after tire rotation when the vehicle is stopped, the tire pressure of the left and right front wheels is 500 [kPa] and the tire pressure of the left and right rear wheels is 300 [kPa]. There are no wheels below the warning threshold of 240 [kPa].
  • Example 1 when it is determined in step S6 that there are three or more wheels of the tire air pressure of each wheel that are below the warning threshold 400 [kPa] for the front wheels, the warning lamp 6 is turned on regardless of the determination result in step S4. Light.
  • the tire pressure of the left and right front wheels is 500 [kPa]
  • the tire pressure of the left and right rear wheels is 300 [kPa].
  • the tire pressure monitoring device of the first embodiment has the following effects.
  • a pressure sensor 2a for detecting tire air pressure a temperature sensor 2b for detecting air temperature in the tire, an air amount calculating means (S4) for calculating the tire air amount based on the tire air pressure and the air temperature,
  • S4 an air amount calculating means
  • the first abnormality determination means (S2) that lights 6 and the warning lamp 6 is turned off when the vehicle is stopped and there is even one wheel whose tire air volume has increased compared to when the vehicle is stopped
  • 1 and 2nd abnormality determination means (S3, S4) which continues the extinction state of the warning lamp 6 irrespective of the determination result of the abnormality determination means. If the warning lamp 6 is turned off when the vehicle is stopped and the tire air volume is increasing even if one wheel is used, it is highly possible that the air pressure has been adjusted after the tire rotation. By continuing the light-off state, it is possible to prevent the warning lamp 6 from being turned on during the tire location and to prevent the driver from feeling uncomfortable. In addition, if the driver does not take appropriate measures against the drop in air pressure that occurred before the vehicle stopped, the warning lamp 6 can be prevented from turning off during the tire location, and the driver can run at the recommended air pressure. Can be continuously urged.
  • Second abnormality determination means for lighting the warning lamp 6 regardless of the determination result of the second abnormality determination means when the detected tire pressure of one or more wheels is less than the warning threshold value 240 [kPa] for the rear wheels (S5) was provided. If the tire pressure is adjusted properly after tire rotation when the vehicle is stopped, the tire pressure of the left and right front wheels is 500 [kPa] and the tire pressure of the left and right rear wheels is 300 [kPa]. There are no wheels below the warning threshold of 240 [kPa]. Therefore, if there is even one wheel below the warning threshold of 240 [kPa] for the rear wheel, there is a wheel that is not properly adjusted for air pressure.In that case, by turning on the warning lamp 6, The driver can be encouraged to run at the recommended air pressure.
  • the recommended air pressure and the warning threshold are constant, but may be variable according to the air temperature in the tire.
  • the recommended air pressure Pwarm during traveling can be expressed as follows using the Boyle-Charles law.
  • Pwarm Twarm ⁇ Pcold / Tcold
  • Twarm the temperature in the tire during running
  • Pcold the placard pressure
  • Tcold the air temperature in the tire when the driver adjusts the tire air pressure to the placard pressure (when cold).
  • the 2nd abnormality determination means of this invention determines the presence or absence of the air pressure adjustment after tire rotation based on the increase in air quantity, even if it is a case where a warning threshold value changes according to the air temperature in a tire
  • the presence or absence of air pressure adjustment can be determined.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

L'invention porte sur un dispositif de contrôle de pression d'air de pneu, lequel dispositif comprend : des moyens de calcul de volume d'air (S4) pour calculer un volume d'air de pneu sur la base d'une température d'air et d'une pression d'air de pneu ; des premiers moyens de détermination d'anomalie (S2) pour déterminer que des conditions sont normales quand une pression d'air de roue avant est supérieure à un seuil d'alarme de roue avant de 400 [kPa] et qu'une pression d'air de pneu de roue arrière est supérieure à un seuil d'alarme de roue arrière de 240 [kPa], et pour allumer un voyant d'alarme dans tous les autres cas ; et des seconds moyens de détermination d'anomalie (S3, S4) pour maintenir le voyant d'alarme éteint quel que soit le résultat de détermination des premiers moyens de détection d'anomalie quand le voyant d'alarme est éteint pendant que le véhicule est arrêté et quand il n'y a qu'une seule roue du véhicule dans laquelle le volume d'air de pneu est supérieur au volume normal quand le véhicule s'est arrêté.
PCT/JP2013/056095 2012-03-09 2013-03-06 Dispositif de contrôle de pression d'air de pneu Ceased WO2013133308A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012-053815 2012-03-09
JP2012053815A JP2015096339A (ja) 2012-03-09 2012-03-09 タイヤ空気圧モニター装置

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104369630A (zh) * 2014-10-21 2015-02-25 中山市六源通电子科技有限公司 胎压监测系统和监测及显示方法
CN104385861A (zh) * 2014-10-21 2015-03-04 中山市六源通电子科技有限公司 多功能胎压监测系统
JP2015063203A (ja) * 2013-09-25 2015-04-09 日産自動車株式会社 タイヤ空気圧モニター装置
WO2016088865A1 (fr) * 2014-12-05 2016-06-09 株式会社オートネットワーク技術研究所 Dispositif de notification embarqué et système de notification

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6252579B2 (ja) * 2015-11-10 2017-12-27 トヨタ自動車株式会社 タイヤ空気圧監視装置

Citations (4)

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Publication number Priority date Publication date Assignee Title
JP2004098835A (ja) * 2002-09-09 2004-04-02 Denso Corp タイヤ空気圧監視システム
JP2007176218A (ja) * 2005-12-27 2007-07-12 Nissan Motor Co Ltd タイヤ空気圧監視システム
JP2008126959A (ja) * 2006-11-24 2008-06-05 Toyota Motor Corp 車載異常警報装置
JP2009051347A (ja) * 2007-08-27 2009-03-12 Denso Corp 空気圧検出装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004098835A (ja) * 2002-09-09 2004-04-02 Denso Corp タイヤ空気圧監視システム
JP2007176218A (ja) * 2005-12-27 2007-07-12 Nissan Motor Co Ltd タイヤ空気圧監視システム
JP2008126959A (ja) * 2006-11-24 2008-06-05 Toyota Motor Corp 車載異常警報装置
JP2009051347A (ja) * 2007-08-27 2009-03-12 Denso Corp 空気圧検出装置

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015063203A (ja) * 2013-09-25 2015-04-09 日産自動車株式会社 タイヤ空気圧モニター装置
CN104369630A (zh) * 2014-10-21 2015-02-25 中山市六源通电子科技有限公司 胎压监测系统和监测及显示方法
CN104385861A (zh) * 2014-10-21 2015-03-04 中山市六源通电子科技有限公司 多功能胎压监测系统
WO2016088865A1 (fr) * 2014-12-05 2016-06-09 株式会社オートネットワーク技術研究所 Dispositif de notification embarqué et système de notification
JP2016107823A (ja) * 2014-12-05 2016-06-20 株式会社オートネットワーク技術研究所 車載報知装置及び報知システム
CN107107686A (zh) * 2014-12-05 2017-08-29 株式会社自动网络技术研究所 车载通知装置及通知系统
CN107107686B (zh) * 2014-12-05 2019-05-14 株式会社自动网络技术研究所 车载通知装置及通知系统

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