WO2008007531A1 - Dispositif de surveillance de pression d'air de pneumatique - Google Patents

Dispositif de surveillance de pression d'air de pneumatique Download PDF

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Publication number
WO2008007531A1
WO2008007531A1 PCT/JP2007/062679 JP2007062679W WO2008007531A1 WO 2008007531 A1 WO2008007531 A1 WO 2008007531A1 JP 2007062679 W JP2007062679 W JP 2007062679W WO 2008007531 A1 WO2008007531 A1 WO 2008007531A1
Authority
WO
WIPO (PCT)
Prior art keywords
tire
air pressure
pressure
tire pressure
displacement
Prior art date
Application number
PCT/JP2007/062679
Other languages
English (en)
Japanese (ja)
Inventor
Tatsumi Iida
Original Assignee
Calsonic Kansei Corporation
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 Calsonic Kansei Corporation filed Critical Calsonic Kansei Corporation
Publication of WO2008007531A1 publication Critical patent/WO2008007531A1/fr

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L17/00—Devices or apparatus for measuring tyre pressure or the pressure in other inflated bodies
    • 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

Definitions

  • the present invention relates to a tire air pressure monitoring device that receives tire air pressure information detected by a tire air pressure sensor attached to a tire of a vehicle by a receiver attached to the vehicle body and monitors each tire air pressure. Belonging to the field.
  • This conventional tire pressure monitor is composed of a tire pressure sensor provided on the tire side, a transmission CPU, a transmission unit, and a transmission antenna, and a reception antenna, a reception unit, and a reception device provided on the vehicle body side.
  • It has a receiving device consisting of a CPU and 1st to 3rd warning lights, detects tire air pressure every predetermined time, transmits this detected value with the transmitting device, receives the detected value with the receiving device, and the detected value becomes large If the three different values are reduced, the first and second warning lights will be issued in order according to the tire pressure drop.
  • Patent Document 1 Japanese Patent Laid-Open No. 2000-99869
  • Fig. 8 is a flowchart showing the flow of processing performed in a conventional tire pressure monitor. It is
  • step SI the RF signal force and tire pressure information received by the receiver is extracted.
  • the tire pressure information is processed and the process proceeds to step S2.
  • step S2 the tire pressure information is stored, and the process proceeds to step S3.
  • step S3 it is determined whether or not the tire air pressure is less than or equal to the set air pressure (Pl, P2,? 3; where 1 3 1>? 2> 3). If the tire pressure is less than or equal to the set air pressure P1 to P3, the process proceeds to step S4. If the tire pressure is higher than the set air pressure, the process returns to step S1.
  • step S4 a process is performed to issue an alarm according to whether the set air pressure P1 to P3 is lower than the set air pressure of the deviation, and the process proceeds to step S5.
  • step S5 the first to third warning lights are selected according to the result of step 4, and an alarm is issued.
  • FIG. 9 is a diagram for explaining the detected tire pressure and alarm generation in a conventional tire pressure monitoring device.
  • the present invention has been made by paying attention to the above-mentioned problems, and the object of the present invention is to make it possible to issue a warning earlier to a tire in a state where air is gradually removed.
  • the object is to provide an air pressure monitoring device.
  • tire pressure detection units that detect each tire pressure
  • a transmission unit that transmits a radio signal including at least tire pressure information.
  • Tire pressure drop determining unit that determines that the tire pressure is less than the set air pressure based on the transmission means attached to each of the tires and the tire pressure information included in the radio signal.
  • a tire pressure monitoring device comprising: a warning unit that issues a warning to the driver; a receiving unit that receives a radio signal transmitted from the transmission unit; and a reception unit that is attached to the vehicle body.
  • the receiving means is provided with tire pressure displacement determining means for determining that the displacement amount of the tire air pressure per predetermined time is equal to or greater than the set displacement amount. If the tire air pressure displacement determining means determines that the amount of displacement of the tire air pressure per predetermined time is equal to or greater than the set displacement amount, the means is provided to the driver even if the tire air pressure is greater than the set air pressure. To give an alarm.
  • FIG. 1 is an overall system diagram of a tire air pressure monitoring device according to a first embodiment of the present invention.
  • FIG. 2 is a block diagram of a transmission unit that constitutes the tire pressure monitoring apparatus according to the first embodiment.
  • FIG. 3 is a block diagram of a receiving unit constituting the tire air pressure monitoring device according to the first embodiment.
  • FIG. 4 is a flowchart showing a flow of tire pressure monitoring processing in the tire pressure monitoring device of Embodiment 1.
  • FIG. 5 is a diagram for explaining the detected tire pressure and alarm generation in the tire pressure monitoring apparatus of the first embodiment.
  • FIG. 6 is a flowchart showing the flow of tire pressure monitoring processing in the tire pressure monitoring device of Embodiment 2 according to the present invention.
  • FIG. 7 is a diagram for explaining tire pressure detected by the tire pressure monitoring apparatus of Example 2 and generation of an alarm.
  • FIG. 8 is a flow chart showing the flow of tire pressure monitoring processing in a conventional tire pressure monitoring device.
  • FIG. 9 is a diagram for explaining the detected tire pressure and alarm generation in a conventional tire pressure monitoring device.
  • Example 1 Example 1
  • Example 2 Example 2
  • FIG. 1 is an overall system diagram showing a vehicle to which the tire pressure monitoring device of the first embodiment is applied.
  • the tire pressure monitoring device is provided on each tire side of the right front wheel tire 1, the left front wheel tire 2, the right rear wheel tire 3, and the left rear wheel tire 4 to detect the tire air pressure, and to detect the detected tire air pressure information.
  • a transmission unit 5 that transmits a packet is transmitted, and a reception unit 6 that is provided on the vehicle body 10 side and receives a packet transmitted by each transmission unit 5 is provided.
  • FIG. 2 is a block diagram showing the configuration of the transmission unit 5.
  • the transmission unit 5 includes a centrifugal force switch 50, a tire pressure sensor 51, a battery 52, a control unit 53, an RF signal transmission unit 54, and an RF signal transmission antenna 55.
  • the transmission unit 5 corresponds to the transmission means of the present invention
  • the tire pressure sensor 51 corresponds to the tire pressure detection unit of the present invention
  • the RF signal transmission unit 54 and the RF signal transmission antenna 55 correspond to the transmission unit of the present invention.
  • the centrifugal force switch 50 determines whether the vehicle is running or stopped based on the centrifugal force generated by the rotation of the wheels. Centrifugal force switch 50 is turned on while the vehicle is running and turned off when the vehicle is stopped, and each signal is output to control unit 53.
  • the tire pressure sensor 51 detects the tire pressure and outputs it to the control unit 53 as tire pressure information.
  • the control unit 53 inputs ON / OFF signal information from the centrifugal force switch 50 and tire pressure information from the tire pressure sensor 51 to perform calculation based on the respective information, and an RF signal transmission unit 54 Output a control signal. In addition, power is supplied from the battery 52 to the control unit 53.
  • the RF signal transmission unit 54 Based on the control signal input from the control unit 53, the RF signal transmission unit 54 generates an RF signal to be transmitted from the RF signal transmission antenna 55, and transmits the RF signal from the RF signal transmission antenna 55 to the reception unit 6. Send a signal.
  • FIG. 3 is a block diagram showing a configuration of the receiving unit 6.
  • the receiving unit 6 is provided with an RF signal receiving antenna 60, an RF signal receiving unit 61, a stable power source 62, a control unit 63, and an alarm device 64.
  • the receiving unit 6 is used as a receiving means of the present invention.
  • the F signal receiving antenna 60 and the RF signal receiving unit 61 correspond to the receiving unit of the present invention, and the alarm device 64 corresponds to the alarm unit of the present invention.
  • the RF signal receiving antenna 60 receives the RF signal from the receiving unit 6.
  • the RF signal receiving unit 61 outputs tire pressure information of the RF signal received by the RF signal receiving antenna 60 to the control unit 63.
  • the control unit 63 includes an air pressure decrease determining unit 65, an air pressure displacement determining unit 66, and an alarm output unit 67.
  • the control unit 63 is supplied with power from the stabilized power source 62.
  • the air pressure decrease determination unit 65 is based on the tire air pressure information input from the RF signal receiving unit 61.
  • the air pressure displacement determination unit 66 compares the tire air pressure information inputted from the RF signal receiving unit 61 this time with the tire air pressure information inputted last time, and determines whether or not the displacement amount is equal to or larger than the set displacement amount. The result of the determination is output to the alarm output unit 67.
  • the alarm output unit 67 outputs a control signal to the alarm device 64 in accordance with the determination result input from the air pressure decrease determination unit 65 or the air pressure displacement determination unit 66.
  • the alarm output unit 67 and the alarm device 64 constitute an alarm unit of the present invention.
  • the alarm device 64 gives an alarm to the occupant by sound, light, image, vibration, or the like.
  • the alarm method is not limited to sound, light, image, vibration, or the like as long as the occupant can recognize a decrease in tire air pressure.
  • the primary purpose of the tire pressure monitoring device is to fill the tires with the tires and to provide tire warnings when the tire pressure drops to such an extent that the running stability and fuel consumption deteriorate. This is to encourage repairs, etc., to restore normal tire pressure, or to reduce the running speed until repair.
  • the tire pressure monitoring device of the first embodiment if the amount of decrease in tire pressure per predetermined time is equal to or greater than the set displacement, an alarm is issued even if the tire pressure is higher than the set pressure. I made it.
  • Example 1 when an abnormal decrease in tire air pressure occurs due to the road surface condition, usage environment, etc., by looking at the amount of displacement, this is the reason why this is different from normal for good driving, especially fuel consumption. By warning early on that it will have an impact, the vehicle can always run in good condition.
  • FIG. 4 is a flowchart showing the flow of the tire pressure monitoring process performed in the tire pressure monitoring apparatus of the first embodiment.
  • step SI 1 the tire air pressure information is also extracted from the received RF signal force, processed as tire air pressure information, and the process proceeds to step S 12.
  • step S 12 the tire pressure information is stored, and the process proceeds to step S 13.
  • step S13 it is determined whether or not the tire air pressure is equal to or lower than the set air pressure. If the tire pressure is less than or equal to the set air pressure, the process proceeds to step S15, and if it is higher than the set air pressure, the process proceeds to step S14.
  • step S14 it is determined whether or not the displacement amount per predetermined time of the currently detected tire air pressure with respect to the previously detected tire air pressure is greater than or equal to a set displacement amount. If the displacement is greater than or equal to the set displacement, the process proceeds to step S15. If the displacement is less than the set displacement, the process returns to step S11.
  • the predetermined time is set by experiment or calculation based on the amount of displacement when the tire pressure naturally decreases.
  • step S15 processing for providing an alarm is performed, and the process proceeds to step S16.
  • step S16 an alarm is issued.
  • step S16 an alarm is issued.
  • FIG. 5 is a diagram for explaining the detected tire pressure and alarm generation in the tire pressure device of the first embodiment.
  • tire pressure is measured every predetermined time.
  • the tire pressure measured from the nlth to the n3th time is constant at P1 and higher than the set air pressure, so the alarm device 64 does not issue an alarm.
  • the tire pressure measured at the n4th time is P2 (P1), but the displacement of the tire pressure (P to P2) is smaller than the set displacement and higher than the set air pressure, so the alarm device 64 issues an alarm. do not do.
  • P3 ((P2), but the displacement of the tire pressure (P2-P3) is smaller than the set displacement amount.
  • the tire pressure measured at the n6th time is P4 (P3), and the displacement of the tire pressure (P3-P4) is larger than the set displacement amount.
  • the tire pressure P4 is higher than the set pressure, but the alarm 64 issues an alarm.
  • the difference (displacement amount per predetermined time) between the tire air pressure measured last time and the tire air pressure measured this time is the set displacement amount. If so, an alarm was issued. Therefore, the occupant can grasp the decrease in the tire pressure in advance before the tire pressure falls below the set air pressure. For this reason, warnings can prompt passengers to perform maintenance and inspection tasks such as filling tire pressure and replacing / inspecting valves in advance.
  • the tire pressure monitoring device of Example 1 includes a tire pressure sensor 51 (tire pressure detection unit) that detects the pressure of the tire 1 in a transmission unit 5 (transmission means) provided in each tire 1. And an RF signal transmitting unit 54 and an RF signal transmitting antenna 55 (transmitting unit) that transmit tire pressure information as a radio signal.
  • an RF signal receiving antenna 60 and an RF signal receiving unit 61 (receiving unit) for receiving a radio signal transmitted from the transmitting unit 5 are connected to a receiving unit 6 (receiving unit) provided on the vehicle body side, From the tire pressure information included in the radio signal, an air pressure decrease determining unit 65 (tire pressure decrease determining means) for determining that the tire air pressure is equal to or lower than the set air pressure, The air pressure displacement determining unit 66 (tire pressure displacement determining means) for determining that the displacement amount of the air pressure is equal to or greater than the set displacement amount, and the tire air pressure is less than the set air pressure or the displacement amount per predetermined time of the tire air pressure is the set displacement.
  • the system is equipped with an alarm output unit 67 and an alarm device 64 (alarm unit) that alerts the driver when the amount exceeds the limit.
  • Example 1 an alarm is issued when the displacement amount of one tire due to the passage of time is equal to or greater than the set displacement amount.
  • Example 2 differs in that an alarm is issued when the amount of displacement of the other tires from the air pressure is equal to or greater than the set amount of displacement.
  • the processing in the pneumatic displacement determination unit 66 of the control unit 63 of the receiving unit 6 shown in FIG. 6 is different from the processing in the first embodiment.
  • the pneumatic displacement determination unit 66 compares the tire pressure information input from the RF signal receiving unit 61 this time with the tire pressure information input last time, and It is configured to determine whether or not the displacement amount is equal to or greater than the set displacement amount, and to output the determination result to the warning output unit 67.
  • the air pressure displacement determining unit 66 includes, for example, the tire air pressure information of the left rear wheel tire 4 (RL) input from the RF signal receiving unit 61 and the right front wheel tire. Compare the tire pressure information of 1 (FL), left front wheel tire 2 (FR), and right rear wheel tire 3 (RR) to determine whether the displacement is greater than or equal to the set displacement. The result is output to the alarm output unit 67.
  • Example 2 when the air pressure of a certain tire decreases and V rises with respect to the air pressure of another tire, an alarm is issued even if the tire air pressure is higher than the set air pressure.
  • FIG. 6 is a flowchart showing the flow of processing performed in the tire pressure monitoring apparatus of the second embodiment.
  • step SI 1 the tire air pressure information is also extracted from the received RF signal force, processed as tire air pressure information, and the process proceeds to step S 12.
  • step S12 the tire pressure information is stored, and the process proceeds to step S13.
  • step S13 it is determined whether or not the tire air pressure is equal to or lower than the set air pressure. If the tire pressure is less than or equal to the set air pressure, the process proceeds to step S15, and if it is higher than the set air pressure, the process proceeds to step S17.
  • step S 17 it is determined whether or not the force between the tire air pressures is greater than or equal to the set displacement amount. If the displacement is greater than or equal to the set displacement, the process proceeds to step S15. If the displacement is lower than the set displacement !, the process returns to step S11.
  • whether or not the amount of displacement between the tire pressures is equal to or greater than the set displacement amount is not a comparison between the highest value and the lowest value of the tire pressure. Compare with adjacent tire pressure values. For example, if the tire pressure is right front wheel tire 1 (FR), left front wheel tire 2 (FL), right rear wheel tire 3 (RR), left rear wheel tire 4 (RL) in descending order of tire pressure, the right rear wheel Tire 3 (RR) is compared with the air pressure values of left front wheel tire 2 (FL) and left rear wheel tire 4 (RL).
  • step S15 a process for alarming is performed, and the process proceeds to step S16.
  • step S16 an alarm is issued.
  • FIG. 7 is a diagram for explaining the detected tire pressure and alarm generation in the tire pressure device of the first embodiment.
  • the pressure of any tire must be equal to or lower than the set air pressure V, but even if only one tire has a reduced pressure, an alarm can be issued. . Therefore, it is possible to prompt the occupant to fill the tire pressure and balance the air pressure of other tires.
  • the tire pressure monitoring device of the second embodiment includes a tire pressure sensor 51 (tire pressure detection unit) that detects the pressure of the tire 1 in a transmission unit 5 (transmission means) provided in each tire 1. And an RF signal transmission unit 54 and an RF signal transmission antenna 55 (transmission unit) that transmit tire pressure information as a radio signal.
  • an RF signal receiving antenna 60 and an RF signal receiving unit 61 (receiving unit) that receive a radio signal transmitted from the transmitting unit 5 are connected to a receiving unit 6 (receiving unit) provided on the vehicle body side, From the tire pressure information included in the radio signal, the tire pressure drop judging unit 65 (tire pressure drop judging means) for judging that the tire pressure is equal to or lower than the set air pressure, and the displacement of the tire pressure with respect to the air pressure of other tires. When the tire pressure is less than the set air pressure, or when the tire pressure displacement is greater than or equal to the set displacement amount The alarm output unit 67 and the alarm device 64 (alarm unit) for alarming the driver.
  • Example 1 the best mode for carrying out the present invention has been described based on Example 1 and Example 2.
  • the specific configuration of the present invention is limited to Example 1 or Example 2. is not.
  • the tire pressure information may be transmitted to the portable terminal when the driver goes out of the vehicle.

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

Abstract

La présente invention concerne un dispositif de surveillance de pression d'air de pneumatique qui possède une unité de transmission (5) prévue sur le côté du pneumatique, qui détecte une pression d'air de pneumatique, et transmet des informations sur la pression d'air de pneumatique, et possède également une unité de réception (6) prévue sur le côté de la carrosserie du véhicule et qui reçoit les informations sur la pression d'air de pneumatique. Une section de détermination de changement de pression d'air de pneumatique (66) de l'unité de réception (6) détermine si une différence entre une pression d'air de pneumatique obtenue dans la mesure précédente et une pression d'air de pneumatique obtenue dans la mesure actuelle est supérieure ou égale à une quantité de changement prédéterminée. Si la différence est supérieure ou égale à la quantité de changement prédéterminée, le dispositif de surveillance de pression d'air de pneumatique émet un avertissement même si la pression d'air de pneumatique est supérieure à une pression d'air prédéterminée.
PCT/JP2007/062679 2006-07-10 2007-06-25 Dispositif de surveillance de pression d'air de pneumatique WO2008007531A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2006189113A JP2008013145A (ja) 2006-07-10 2006-07-10 タイヤ空気圧監視装置
JP2006-189113 2006-07-10

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112020445A (zh) * 2018-05-07 2020-12-01 日产自动车株式会社 轮胎气压报警装置
EP4230442A4 (fr) * 2020-10-16 2024-03-27 Bridgestone Corporation Système et programme de surveillance de pression de pneumatiques

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5660655B2 (ja) * 2009-08-21 2015-01-28 ローム株式会社 車両のタイヤ空気圧管理装置および空気圧情報を出力可能な車両用タイヤ
JP2012218582A (ja) * 2011-04-08 2012-11-12 Tokai Rika Co Ltd タイヤ空気圧監視システムの受信機
US11203235B2 (en) * 2020-05-05 2021-12-21 Enervibe Ltd System for tires pressure and wear detection

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JPH09207528A (ja) * 1996-01-26 1997-08-12 Michelin & Cie 走行中に自動車のタイヤを監視するシステムにおける信号を処理する方法
JPH106723A (ja) * 1996-03-20 1998-01-13 Michelin & Cie タイヤモニタリング装置における圧力測定値の処理方法
JP2002120530A (ja) * 2000-08-22 2002-04-23 Lite On Automotive Corp 空気入りタイヤのモニター方法およびそのモニター装置
JP2003246212A (ja) * 2001-12-17 2003-09-02 Honda Motor Co Ltd タイヤ空気圧検知装置
JP2004515395A (ja) * 2000-12-05 2004-05-27 フオルクスワーゲン・アクチエンゲゼルシヤフト 自動車のタイヤの空気圧を監視する装置と方法
JP2005335525A (ja) * 2004-05-26 2005-12-08 Denso Corp タイヤ監視システム
JP2006168457A (ja) * 2004-12-14 2006-06-29 Mitsubishi Motors Corp タイヤ空気圧監視装置
JP2006327554A (ja) * 2005-05-30 2006-12-07 Nissan Motor Co Ltd タイヤ空気圧モニタ装置
JP2007191047A (ja) * 2006-01-19 2007-08-02 Mitsubishi Motors Corp タイヤ空気圧監視システム

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06191247A (ja) * 1992-12-28 1994-07-12 Sumitomo Rubber Ind Ltd タイヤ空気圧異常検出方法および装置
JPH09207528A (ja) * 1996-01-26 1997-08-12 Michelin & Cie 走行中に自動車のタイヤを監視するシステムにおける信号を処理する方法
JPH106723A (ja) * 1996-03-20 1998-01-13 Michelin & Cie タイヤモニタリング装置における圧力測定値の処理方法
JP2002120530A (ja) * 2000-08-22 2002-04-23 Lite On Automotive Corp 空気入りタイヤのモニター方法およびそのモニター装置
JP2004515395A (ja) * 2000-12-05 2004-05-27 フオルクスワーゲン・アクチエンゲゼルシヤフト 自動車のタイヤの空気圧を監視する装置と方法
JP2003246212A (ja) * 2001-12-17 2003-09-02 Honda Motor Co Ltd タイヤ空気圧検知装置
JP2005335525A (ja) * 2004-05-26 2005-12-08 Denso Corp タイヤ監視システム
JP2006168457A (ja) * 2004-12-14 2006-06-29 Mitsubishi Motors Corp タイヤ空気圧監視装置
JP2006327554A (ja) * 2005-05-30 2006-12-07 Nissan Motor Co Ltd タイヤ空気圧モニタ装置
JP2007191047A (ja) * 2006-01-19 2007-08-02 Mitsubishi Motors Corp タイヤ空気圧監視システム

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112020445A (zh) * 2018-05-07 2020-12-01 日产自动车株式会社 轮胎气压报警装置
CN112020445B (zh) * 2018-05-07 2023-06-23 日产自动车株式会社 轮胎气压报警装置
EP4230442A4 (fr) * 2020-10-16 2024-03-27 Bridgestone Corporation Système et programme de surveillance de pression de pneumatiques

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