JP2003246212A - Tire air pressure detecting apparatus - Google Patents
Tire air pressure detecting apparatusInfo
- Publication number
- JP2003246212A JP2003246212A JP2002206937A JP2002206937A JP2003246212A JP 2003246212 A JP2003246212 A JP 2003246212A JP 2002206937 A JP2002206937 A JP 2002206937A JP 2002206937 A JP2002206937 A JP 2002206937A JP 2003246212 A JP2003246212 A JP 2003246212A
- Authority
- JP
- Japan
- Prior art keywords
- warning
- value
- tire pressure
- air pressure
- tire
- 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.)
- Granted
Links
Abstract
Description
【発明の詳細な説明】
【０００１】
【発明の属する技術分野】本発明は、タイヤの空気圧を
検出して車両の走行中でもタイヤの空気圧を運転者が認
識することを可能にしたタイヤ空気圧検知装置に関す
る。
【０００２】
【従来の技術】車両の走行中でもタイヤの空気圧を運転
車が認識することを可能にしたタイヤ空気圧検知装置と
して、例えば、特開平１０−４４７２６号公報「タイヤ
空気圧警報装置」が知られている。上記技術は、同公報
の図１によれば、ホイールリム１（符号は公報の符号を
流用した）にバルブステム１０を取付け、このバルブス
テム１０の基部にケース２を配置し、このケース２内に
圧力検知部３、信号処理回路４及び電池５から構成する
送信部７を納めることでタイヤ空気圧を測定し、このタ
イヤ空気圧に異常が認められるときに、即ちタイヤ空気
圧が予め定めた値を下回ったときに、運転者に知らせる
ようにしたタイヤ空気圧警報装置である。
【０００３】
【発明が解決しようとする課題】しかし、上記のタイヤ
空気圧警報装置では、例えば、タイヤ空気圧が予め定め
た値を下回ったときでないと、認知することはできな
い。タイヤ空気圧は、徐々に下がる場合と急激に下がる
場合とその中間の速さで下がる場合がある。これらを一
つの圧力しきい値で管理すると問題が起こる。例えば、
タイヤに極く小さな孔が開き空気漏れが発生したときに
は、タイヤ空気圧は徐々に下がるが、タイヤ空気圧が圧
力しきい値以上であることから正常であるとしたのでは
十分ではない場合がある。
【０００４】すなわち、本発明の目的は、タイヤに空気
漏れ等が発生したときに、タイヤ空気圧が予め定めた値
を下回る前に知ることのできるタイヤ空気圧検知装置を
提供することにある。
【０００５】
【課題を解決するための手段】上記目的を達成するため
に請求項１は、空気圧センサでタイヤ空気圧を検出し、
このタイヤ空気圧を認知できるようにしたタイヤ空気圧
検知装置において、タイヤ空気圧の単位時間あたりの変
動値が所定の変動値しきい値を超えたときに警告を発す
る変動値警告手段と、タイヤ空気圧の検出値が所定の検
出値しきい値を下回った時に警告を発する検出値警告手
段と、を備えたことを特徴とする。
【０００６】車両の走行中、タイヤに空気漏れ等が発生
したときに、タイヤ空気圧が予め定めた値を下回る前に
も知ることができるとすれば好ましいことである。そこ
で、タイヤ空気圧の単位時間あたりの変動値が所定の変
動値しきい値を超えたときに警告を発する変動値警告手
段を備えることで、例えば、空気漏れが発生したときに
迅速に知り得る。この結果、タイヤ空気圧の変化の少な
い時点での対処が可能になる。また、タイヤ空気圧の検
出値が所定の検出値しきい値を下回った時に警告を発す
る検出値警告手段を備えることで、タイヤ空気圧の単位
時間あたりの変動値が所定の変動値しきい値を超えない
ような微小な空気漏れを生じたとしても、空気圧の異常
を知り得る。この結果、運転者のタイヤ空気圧管理の利
便性を向上することができる。
【０００７】
【発明の実施の形態】本発明の実施の形態を添付図に基
づいて以下に説明する。なお、図面は符号の向きに見る
ものとする。図１は本発明に係るタイヤ空気圧検知装置
を搭載した自動二輪車の側面図であり、自動二輪車１０
は、車両の後方下部に向かって延ばした車体フレーム１
１と、この車体フレーム１１に取付けたヘッドパイプ１
２と、このヘッドパイプ１２に取付けたフロントフォー
ク１３と、フロントフォーク１３に取付けた前輪１４
と、フロントフォーク１３に連結したハンドル１５と、
車体フレーム１１の後上部に一端を取付けたリヤサスペ
ンション１６と、このリヤサスペンション１６の他端と
車体フレーム１１後下部との間にスイング自在に取付け
たスイングアーム１７と、このスイングアーム１７の先
端に取付けた後輪１８と、車体フレーム１１の後部上部
に配置したシート１９と、車体フレーム１１の下方に配
置したエンジン２２と変速機２３とからなるパワーユニ
ット２１とを、主要構成とした原動機付き自動二輪車で
ある。
【０００８】図中、２４，２５は車軸、２７はドライブ
チェーン・カバー、２８はブレーキペダル、２９はキッ
クペダル、３１はレッグシールド、３２はフロントフェ
ンダ、３３はリヤフェンダ、３４はヘッドランプ、３５
はテールランプ、３６はバックミラー、３７はメータパ
ネル、３８はスタンドを示す。５０はタイヤ空気圧検知
装置であり、後述するように、タイヤの空気圧を検出し
て車両の走行中でもタイヤの空気圧を運転者が認識する
ことを可能にする装置である。
【０００９】図２は本発明に係るタイヤ空気圧検知装置
を搭載した自動二輪車のフロント廻りの側面図である。
前輪１４は、ホイール４１と、このホイール４１に取付
けたタイヤ４２と、このタイヤ４２の空気圧を知るため
のタイヤ空気圧検知装置５０からなる。ホイール４１
は、ホイールハブ４５と、ホイールリム４６と、これら
のホイールハブ４５とホイールリム４６とを連結する複
数のスポーク４４・・・（・・・は複数個を示す。以下同じ）
と、ホイールリム４６に取付けた空気バルブ４７とから
なる。なお、図１に示す後輪１８は、前輪１４と略同一
構成の部材であり、詳細な説明を省略する。
【００１０】図３は図２の３−３線断面図であり、タイ
ヤ空気圧検知装置５０の正面断面を示す。タイヤ空気圧
検知装置５０は、ホイールリム４６に開口４８を開け、
この開口４８にゴム製のグロメット５１を嵌め込み、こ
のグロメット５１に芯金５２を差込み、タイヤ４２の空
気圧を検出して圧力情報を外部に発信する発信機５３を
グロメット５１に保持するようにしたものであり、この
発信機５３からの圧力情報に基づいて警告を発する受信
機８１を備える。
【００１１】発信機５３は、タイヤ４２の空気圧を検出
するためにタイヤ４２内に配置する空気圧センサ５５
と、この空気圧センサ５５で検出したタイヤ空気圧の単
位時間あたりの変動値を算出する変動値算出手段７１
と、この変動値算出手段７１で算出した単位時間あたり
の変動値に基づいて警告が必要であるか、注意が必要で
あるか又は正常であるかのを判断する変動値判断手段７
２と、この変動値判断手段７２の結果に基づいて受信機
８１に圧力情報を発信する変動値警告手段７３と、空気
圧センサ５５で検出したタイヤ空気圧に基づいて警告が
必要であるか、注意が必要であるか又は正常であるかの
を判断する空気圧判断手段７７と、この空気圧判断手段
７７の結果に基づいて受信機に圧力情報を発信する検出
値警告手段７８と、これらの検出値警告手段７８及び変
動値判断手段７２の警告・注意信号と正常であることを
示す信号とで発信間隔を変える発信間隔可変手段７９か
ら構成する。
【００１２】なお、グロメット５１を、嵌め込みタイプ
にすることで、ホイールリム４６への取付け性やシール
性を向上させることができる。芯金５２は、発信機５３
の保持機能の他に、変動値警告手段７３及び検出値警告
手段７８から圧力情報を受信機８１に発信するアンテナ
機能を持たせた。また、受信機８１は、後述するように
メータパネル３７（図２参照）に設けたユニットであ
る。図中、６１は、発信機５３の駆動用の電池、６２
は、空気圧センサ５５、電池６１、変動値算出手段７
１、変動値判断手段７２、変動値警告手段７３、空気圧
判断手段７７、検出値警告手段７８及び発信間隔可変手
段７９を一括収納するケースである。
【００１３】図４は本発明に係るタイヤ空気圧検知装置
の受信機を収納したメータパネル平面図であり、受信機
８１は、メータパネル３７に設けたものであって、図３
に示す発信機５３から発信した圧力情報を受信する受信
回路８２と、この受信回路８２で受けた圧力情報を判定
する情報判定手段８３と、この情報判定手段８３で判定
した圧力情報が警告信号のときに第１発光ダイオード８
４を点灯させる第１点灯回路８７と、情報判定手段８３
で判定した圧力情報が注意信号のときに第２発光ダイオ
ード８５を点灯させる第２点灯回路８８と、情報判定手
段８３で判定した圧力情報が正常であることを示す信号
のときに第３発光ダイオード８６を点灯させる第３点灯
回路８９と、情報判定手段８３で判定した圧力情報が警
告信号若しくは注意信号のときにブザー９１を鳴らすブ
ザー駆動回路９２と、からなる。
【００１４】第１発光ダイオード８４は赤色に発光する
ダイオード、第２発光ダイオード８５は黄色に発光する
ダイオード、第３発光ダイオード８６は緑色に発光する
ダイオードである。９３は、受信回路８２、情報判定手
段８３、第１〜第３発光ダイオード、第１〜第３点灯回
路８７〜８９、ブザー９１、ブザー駆動回路９２を一括
して収納するハウジングを示す。
【００１５】図５は本発明に係るタイヤ空気圧検知装置
のブロック図であり、タイヤ空気圧検知装置５０は、空
気圧センサ５５でタイヤ空気圧を検出し、このタイヤ空
気圧を認知できるようにしたタイヤ空気圧検知装置にお
いて、タイヤ空気圧の単位時間あたりの変動値が所定の
変動値しきい値を超えたときに警告を発する変動値警告
手段７３と、タイヤ空気圧の検出値が所定の検出値しき
い値を下回った時に警告を発する検出値警告手段７８
と、を備えたものであると言える。
【００１６】車両の走行中、タイヤに空気漏れ等が発生
したときに、タイヤ空気圧が予め定めた値を下回る前に
も知ることができるとすれば好ましいことである。そこ
で、タイヤ空気圧の単位時間あたりの変動値が所定の変
動値しきい値を超えたときに警告を発する変動値警告手
段７３を備えることで、例えば、空気漏れが発生したと
きに迅速に知り得る。この結果、タイヤ空気圧の変化の
少ない時点での対処が可能になる。また、タイヤ空気圧
の検出値が所定の検出値しきい値を下回った時に警告を
発する検出値警告手段７８を備えることで、タイヤ空気
圧の単位時間あたりの変動値が所定の変動値しきい値を
超えないような微小な空気漏れを生じたとしても、空気
圧の異常を知り得る。この結果、運転者のタイヤ空気圧
管理の利便性を向上することができる。
【００１７】以上に述べたタイヤ空気圧検知装置５０の
作用を次に説明する。図６は本発明に係るタイヤ空気圧
検知装置のフロー図である。（符号は図５参照）。な
お、ＳＴ×××はステップ番号を示す。
ＳＴ３０１：タイヤ空気圧を空気圧センサ５５で検出す
る。
なお、タイヤ空気圧をＰ、タイヤ体積をＶ、タイヤ空気
温度をＴとするときに、Ｐ・Ｖ／Ｔ＝（一定）の関係が
成り立つ。ここで、Ｐは絶対圧力、Ｔは絶対温度であ
る。
ＳＴ３０２：変動値算出手段７１で単位時間当たりの変
動値（タイヤ空気圧の減少圧に相当）Ｐｖを算出する。
【００１８】ＳＴ３０３：単位時間当たりの変動値Ｐｖ
が、変動値しきい値としての第１の変動値しきい値Ｐｖ
1を超えたか（Ｐｖ＞Ｐｖ1）。ＹＥＳの場合はＳＴ３０
５へ進み、ＮＯの場合はＳＴ３０４へ進む。
ＳＴ３０４：単位時間当たりの変動値Ｐｖが、変動値し
きい値としての第２の変動値しきい値Ｐｖ2を超えたか
（Ｐｖ＞Ｐｖ2）。ＹＥＳの場合はＳＴ３０６へ進み、
ＮＯの場合はＳＴ３０７へ進む。
【００１９】ＳＴ３０５：変動値警告手段７３からタイ
ヤ空気圧の変動値Ｐｖが正常であることを示す信号を６
分毎に発信する。この結果、第３発光ダイオード８６が
緑色点灯する。
ＳＴ３０６：変動値警告手段７３から注意信号を５秒毎
に発信する。この結果、第２発光ダイオード８５が黄色
点灯し、且つブザー９１が鳴る。
ＳＴ３０７：変動値警告手段７３から警告信号を５秒毎
に発信する。この結果、第１発光ダイオード８４が赤色
点灯し、且つブザー９１が鳴る。
【００２０】ＳＴ３０８：タイヤ空気圧Ｐｋが、検出値
しきい値としての第１の検出値しきい値Ｐｋ1を下回っ
たか（Ｐｋ＜Ｐｋ1）。ＹＥＳの場合はＳＴ３１０へ進
み、ＮＯの場合はＳＴ３０９へ進む。
ＳＴ３０９：タイヤ空気圧Ｐｋが、検出値しきい値とし
ての第２の検出値しきい値Ｐｋ2を下回ったか（Ｐｋ＜
Ｐｋ2）。ＹＥＳの場合はＳＴ３１１へ進み、ＮＯの場
合はＳＴ３１２へ進む。
【００２１】ＳＴ３１０：検出値警告手段７８からタイ
ヤ空気圧Ｐｖが正常であることを示す信号を６分毎に発
信する。この結果、第３発光ダイオード８６が緑色点灯
する。
ＳＴ３１１：検出値警告手段７８から注意信号を５秒毎
に発信する。この結果、第２発光ダイオード８５が黄色
点灯する。
ＳＴ３１２：検出値警告手段７８から警告信号を５秒毎
に発信する。この結果、第１発光ダイオード８４が赤色
点灯する。
【００２２】変動値警告手段７３は、単位時間当たりの
タイヤ空気圧の変動値Ｐｖを検出して警告を発する手段
であり、特に突発的な空気漏れを発見するのに有効な手
段である。また、検出値警告手段７８は、タイヤ空気圧
Ｐｋ検出して警告を発する手段であり、特に単位時間の
緩やかなタイヤ空気圧の変動では検出し得ない空気漏れ
を発見するのに有効な手段であると言える。そこで、突
発的な空気漏れを発見できる変動値警告手段７３の処理
を検出値警告手段７８の処理よりも優先させて処理させ
ることで、緊急度の高い突発的な空気漏れを迅速に発見
することができる。
【００２３】図７（ａ），（ｂ）は本発明に係るタイヤ
空気圧検知装置の特色を示すグラフであり、（ａ）は変
動値警告手段７３の警告を示すグラフ、（ｂ）は検出値
警告手段７８の警告を示すグラフである。（ａ）におい
て、変動値警告手段７３は、単位時間当たりのタイヤ空
気圧の変動値Ｐｖを検出するために、２つの変動値しき
い値カーブを設定する。すなわち、勾配の緩やかな第１
の変動値しきい値Ｐｖ1カーブと、この第１の変動値し
きい値Ｐｖ1カーブよりも勾配の急な第２の変動値しき
い値Ｐｖ2カーブとを設定する。単位時間当たりの変動
値Ｐｖが、第１の変動値しきい値Ｐｖ1カーブを超えた
ときに注意信号を発し、単位時間当たりの変動値Ｐｖ
が、第２の変動値しきい値Ｐｖ2カーブを超えたときに
警告信号を発することを示す。
【００２４】（ｂ）において、検出値警告手段７８は、
タイヤ空気圧Ｐｋを検出するために、２つの検出値しき
い値カーブを設定する。すなわち、第１の検出値しきい
値Ｐｋ1と、この第１の検出値しきい値Ｐｋ1よりも空気
圧の低い第２の検出値しきい値Ｐｋ2とを設定する。タ
イヤ空気圧Ｐｋが、第１の検出値しきい値Ｐｋ1を下回
ったときに注意信号を発し、第２の検出値しきい値Ｐｋ
2を下回ったときに警告信号を発するようにしたことを
示す。
【００２５】尚、実施の形態では図１に示すように、車
両は自動二輪車１０として説明したが、二輪車に限るも
のではなく、車両は四輪又は三輪車であってもよい。ま
た、実施の形態では図４に示すように、受信機８１をメ
ータパネル３７に設けたが、これに限るものではない。
例えば、警報を発するものであれば車体フレーム、ヘル
メットなどに、バイブレーションを利用するものであれ
ばシート、ヘルメットなどに設けたものであってもよ
い。なお、受信機８１は、前輪１４（図１参照）のため
のユニットとして説明したが、後輪１８についても同時
に受信を行なうユニットであってもよい。
【００２６】さらに、実施の形態では図５に示すよう
に、発信機５３側に変動値警告手段７３及び検出値警告
手段７８を設けたが、これに限るものではなく、例え
ば、送信機側にタイヤ空気圧の情報を発信する発信機を
設け、この発信機からタイヤ空気圧の情報を受ける受信
機を設け、この受信機で変動値警告及び変動値警告の処
理するものであってもよい。
【００２７】
【発明の効果】本発明は上記構成により次の効果を発揮
する。請求項１では、タイヤ空気圧の単位時間あたりの
変動値が所定の変動値しきい値を超えたときに警告を発
する変動値警告手段を備えたので、例えば、空気漏れが
発生したときに迅速に知ることができる。この結果、タ
イヤ空気圧の変化の少ない時点での対処が可能になる。
また、タイヤ空気圧の検出値が所定の検出値しきい値を
下回った時に警告を発する検出値警告手段を備えたの
で、タイヤ空気圧の単位時間あたりの変動値が所定の変
動値しきい値を超えないような微小な空気漏れを生じた
としても、空気圧の異常を知ることができる。この結
果、運転者のタイヤ空気圧管理の利便性を向上すること
ができる。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tire pressure detecting device which detects a tire pressure and enables a driver to recognize the tire pressure even while the vehicle is running. About. 2. Description of the Related Art For example, Japanese Patent Application Laid-Open No. Hei 10-44726 discloses a "tire pressure alarm device" as a tire pressure detection device which enables a driving vehicle to recognize the tire pressure even while the vehicle is running. ing. According to the above technique, according to FIG. 1 of the publication, a valve stem 10 is attached to a wheel rim 1 (the reference numeral is the same as that of the publication), and a case 2 is disposed at a base of the valve stem 10. The tire pressure is measured by placing the pressure detecting unit 3, the signal processing circuit 4 and the transmitting unit 7 composed of the battery 5 in the tire, and when an abnormality is recognized in the tire pressure, that is, when the tire pressure falls below a predetermined value. This is a tire pressure warning device that informs a driver when a tire pressure is exceeded. [0003] However, in the above-described tire pressure warning device, it is not possible to recognize, for example, only when the tire pressure falls below a predetermined value. The tire pressure may gradually decrease, may decrease rapidly, or may decrease at an intermediate speed. A problem arises when these are managed by one pressure threshold. For example,
When an extremely small hole is opened in the tire and air leakage occurs, the tire pressure gradually decreases, but it may not be sufficient to assume that the tire pressure is normal because the tire pressure is equal to or higher than the pressure threshold. [0004] That is, an object of the present invention is to provide a tire pressure detecting device capable of detecting when a tire leaks or the like occurs before the tire pressure falls below a predetermined value. [0005] In order to achieve the above object, a first aspect of the present invention is to detect a tire air pressure with an air pressure sensor,
In the tire pressure detecting device capable of recognizing the tire pressure, a fluctuation value warning means for issuing a warning when a fluctuation value per unit time of the tire pressure exceeds a predetermined fluctuation value threshold value, and detecting the tire pressure. Detection value warning means for issuing a warning when the value falls below a predetermined detection value threshold value. [0006] It is desirable that when a tire leaks air or the like during running of the vehicle, it can be known even before the tire pressure falls below a predetermined value. Therefore, by providing a fluctuation value warning unit that issues a warning when the fluctuation value of the tire air pressure per unit time exceeds a predetermined fluctuation value threshold value, it is possible to quickly know, for example, when an air leak occurs. As a result, it is possible to take measures at a time when the change in the tire pressure is small. In addition, by providing a detection value warning unit that issues a warning when the detection value of the tire pressure falls below a predetermined detection value threshold value, the variation value of the tire pressure per unit time exceeds the predetermined variation value threshold value. Even if a small air leak occurs, it is possible to know the air pressure abnormality. As a result, the convenience of the driver's tire pressure management can be improved. An embodiment of the present invention will be described below with reference to the accompanying drawings. The drawings should be viewed in the direction of reference numerals. FIG. 1 is a side view of a motorcycle equipped with a tire pressure detecting device according to the present invention.
Is a body frame 1 extending toward the lower rear of the vehicle.
1 and a head pipe 1 attached to the body frame 11
2, a front fork 13 attached to the head pipe 12, and a front wheel 14 attached to the front fork 13.
And a handle 15 connected to the front fork 13;
A rear suspension 16 having one end attached to the upper rear portion of the body frame 11, a swing arm 17 swingably attached between the other end of the rear suspension 16 and the lower rear portion of the body frame 11, A motorcycle with a prime mover mainly including a mounted rear wheel 18, a seat 19 disposed at an upper rear portion of a body frame 11, and a power unit 21 including an engine 22 and a transmission 23 disposed below the body frame 11. It is. In the figure, 24 and 25 are axles, 27 is a drive chain cover, 28 is a brake pedal, 29 is a kick pedal, 31 is a leg shield, 32 is a front fender, 33 is a rear fender, 34 is a headlamp, 35
Denotes a tail lamp, 36 denotes a rearview mirror, 37 denotes a meter panel, and 38 denotes a stand. Reference numeral 50 denotes a tire pressure detection device that detects a tire pressure and enables a driver to recognize the tire pressure even while the vehicle is running, as described later. FIG. 2 is a side view of a motorcycle equipped with a tire pressure detecting device according to the present invention, around a front of a motorcycle.
The front wheel 14 includes a wheel 41, a tire 42 attached to the wheel 41, and a tire pressure detecting device 50 for knowing the pressure of the tire 42. Wheel 41
Indicates a wheel hub 45, a wheel rim 46, and a plurality of spokes 44 connecting the wheel hub 45 and the wheel rim 46.
And an air valve 47 attached to the wheel rim 46. The rear wheel 18 shown in FIG. 1 is a member having substantially the same configuration as the front wheel 14, and a detailed description thereof will be omitted. FIG. 3 is a sectional view taken along line 3-3 of FIG. 2, showing a front sectional view of the tire air pressure detecting device 50. The tire pressure detecting device 50 opens an opening 48 in the wheel rim 46,
A rubber grommet 51 is fitted into the opening 48, a core bar 52 is inserted into the grommet 51, and a transmitter 53 for detecting the air pressure of the tire 42 and transmitting pressure information to the outside is held in the grommet 51. And a receiver 81 that issues a warning based on the pressure information from the transmitter 53. The transmitter 53 has an air pressure sensor 55 disposed in the tire 42 for detecting the air pressure of the tire 42.
A variation value calculating means 71 for calculating a variation value per unit time of the tire air pressure detected by the air pressure sensor 55.
And a fluctuation value judging means 7 for judging whether a warning is required, caution is required or normal based on the fluctuation value per unit time calculated by the fluctuation value calculating means 71.
2, a fluctuation value warning unit 73 for transmitting pressure information to the receiver 81 based on the result of the fluctuation value determination unit 72, and a warning as to whether warning is necessary based on the tire pressure detected by the air pressure sensor 55. Pneumatic pressure judging means 77 for judging whether it is necessary or normal, detected value warning means 78 for transmitting pressure information to a receiver based on the result of the air pressure judging means 77, and these detected value warning means It comprises a transmission interval variable means 79 for changing a transmission interval between a warning / caution signal of the fluctuation value judging means 78 and a signal indicating normality. The grommet 51 is of a fitting type, so that the attachment to the wheel rim 46 and the sealing performance can be improved. The cored bar 52 includes a transmitter 53
In addition to the holding function described above, an antenna function of transmitting pressure information from the fluctuation value warning means 73 and the detection value warning means 78 to the receiver 81 is provided. The receiver 81 is a unit provided on the meter panel 37 (see FIG. 2) as described later. In the figure, reference numeral 61 denotes a battery for driving the transmitter 53;
Are the air pressure sensor 55, the battery 61, and the fluctuation value calculating means 7.
1. In this case, the fluctuation value determination means 72, the fluctuation value warning means 73, the air pressure determination means 77, the detection value warning means 78, and the transmission interval variable means 79 are collectively stored. FIG. 4 is a plan view of a meter panel in which the receiver of the tire pressure detecting device according to the present invention is housed. The receiver 81 is provided on the meter panel 37, and FIG.
, A receiving circuit 82 for receiving the pressure information transmitted from the transmitter 53, an information determining means 83 for determining the pressure information received by the receiving circuit 82, and the pressure information determined by the information determining means 83 is a warning signal. Sometimes the first light emitting diode 8
A first lighting circuit 87 for turning on the light source 4;
A second lighting circuit 88 for turning on the second light emitting diode 85 when the pressure information determined in step 3 is a caution signal, and a third light emitting diode when the pressure information determined by the information determining means 83 is normal. A third lighting circuit 89 for turning on 86 is provided, and a buzzer driving circuit 92 for sounding a buzzer 91 when the pressure information determined by the information determining means 83 is a warning signal or a caution signal. The first light emitting diode 84 is a diode that emits red light, the second light emitting diode 85 is a diode that emits yellow light, and the third light emitting diode 86 is a diode that emits green light. Reference numeral 93 denotes a housing that collectively houses the receiving circuit 82, the information determining means 83, the first to third light emitting diodes, the first to third lighting circuits 87 to 89, the buzzer 91, and the buzzer driving circuit 92. FIG. 5 is a block diagram of a tire pressure detecting device according to the present invention. A tire pressure detecting device 50 detects a tire pressure by an air pressure sensor 55 so that the tire pressure can be recognized. In the above, the fluctuation value warning means 73 which issues a warning when the fluctuation value per unit time of the tire air pressure exceeds a predetermined fluctuation value threshold value, and the detected value of the tire air pressure falls below the predetermined detection value threshold value Detected value warning means 78 for issuing a warning at the time
It can be said that it is provided with. [0016] It is preferable if the tire air pressure or the like can be known before the tire air pressure falls below a predetermined value when an air leak or the like occurs in the tires while the vehicle is running. Therefore, by providing the fluctuation value warning unit 73 that issues a warning when the fluctuation value per unit time of the tire air pressure exceeds a predetermined fluctuation value threshold value, for example, it is possible to quickly know when an air leak occurs. . As a result, it is possible to take measures at a time when the change in the tire pressure is small. In addition, by providing a detection value warning unit 78 that issues a warning when the detected value of the tire pressure falls below a predetermined detection value threshold value, the variation value of the tire pressure per unit time is less than the predetermined variation value threshold value. Even if a small air leak that does not exceed the limit is detected, an abnormality in the air pressure can be known. As a result, the convenience of the driver's tire pressure management can be improved. The operation of the tire pressure detecting device 50 described above will now be described. FIG. 6 is a flowchart of the tire pressure detecting device according to the present invention. (Refer to FIG. 5 for symbols). Note that STxxx indicates a step number. ST301: The tire pressure is detected by the pressure sensor 55. When the tire air pressure is P, the tire volume is V, and the tire air temperature is T, the relationship of P · V / T = (constant) holds. Here, P is an absolute pressure and T is an absolute temperature. ST302: The fluctuation value calculation means 71 calculates a fluctuation value per unit time (corresponding to a decrease in tire air pressure) Pv. ST303: Variation value Pv per unit time
Is the first variation value threshold value Pv as the variation value threshold value
Has it exceeded 1 (Pv> Pv1)? ST30 if YES
The process proceeds to ST304, and if NO, the process proceeds to ST304. ST304: Whether the fluctuation value Pv per unit time exceeds a second fluctuation value threshold value Pv2 as a fluctuation value threshold value (Pv> Pv2). If YES, proceed to ST306,
If NO, the process proceeds to ST307. ST305: A signal indicating that the fluctuation value Pv of the tire pressure is normal is output from the fluctuation value warning means 73 to 6
Make a call every minute. As a result, the third light emitting diode 86 turns on green. ST306: A warning signal is transmitted from the fluctuation value warning means 73 every 5 seconds. As a result, the second light emitting diode 85 lights yellow and the buzzer 91 sounds. ST307: A warning signal is transmitted from the fluctuation value warning means 73 every 5 seconds. As a result, the first light emitting diode 84 lights up in red and the buzzer 91 sounds. ST308: Is the tire pressure Pk lower than a first detection value threshold value Pk1 as a detection value threshold value (Pk <Pk1)? In the case of YES, the process proceeds to ST310, and in the case of NO, the process proceeds to ST309. ST309: Whether the tire pressure Pk has fallen below a second detection value threshold value Pk2 as a detection value threshold value (Pk <
Pk2). If the determination is YES, the process proceeds to ST311. If the determination is NO, the process proceeds to ST312. ST310: A signal indicating that the tire pressure Pv is normal is transmitted from the detected value warning means 78 every six minutes. As a result, the third light emitting diode 86 turns on green. ST311: A warning signal is transmitted from the detection value warning means 78 every 5 seconds. As a result, the second light emitting diode 85 turns on yellow. ST312: A warning signal is transmitted from the detection value warning means 78 every 5 seconds. As a result, the first light emitting diode 84 lights in red. The fluctuation value warning means 73 is a means for detecting a fluctuation value Pv of the tire air pressure per unit time and issuing a warning, and is particularly effective for detecting a sudden air leak. Further, the detection value warning means 78 is a means for detecting the tire pressure Pk and issuing a warning, and is particularly effective for finding an air leak which cannot be detected by a gradual change in tire pressure per unit time. I can say. Therefore, by causing the processing of the fluctuation value warning means 73 capable of finding a sudden air leak to be performed prior to the processing of the detection value warning means 78, a sudden urgent air leak with a high degree of urgency can be quickly found. Can be. FIGS. 7A and 7B are graphs showing the characteristics of the tire pressure detecting device according to the present invention. FIG. 7A is a graph showing a warning of the fluctuation value warning means 73, and FIG. 6 is a graph showing a warning of a warning unit 78. In (a), the fluctuation value warning means 73 sets two fluctuation value threshold curves in order to detect the fluctuation value Pv of the tire air pressure per unit time. That is, the first with a gentle gradient
And a second fluctuation value threshold Pv2 curve having a steeper slope than the first fluctuation value threshold Pv1 curve. When the fluctuation value Pv per unit time exceeds the first fluctuation value threshold value Pv1 curve, a warning signal is issued, and the fluctuation value Pv per unit time is output.
Indicates that a warning signal is issued when the value exceeds the second fluctuation value threshold value Pv2 curve. In (b), the detection value warning means 78
In order to detect the tire pressure Pk, two detection value threshold curves are set. That is, a first detection value threshold value Pk1 and a second detection value threshold value Pk2 having a lower air pressure than the first detection value threshold value Pk1 are set. A warning signal is issued when the tire pressure Pk falls below the first detection value threshold value Pk1, and the second detection value threshold value Pk
Indicates that a warning signal is issued when the value falls below 2. In the embodiment, as shown in FIG. 1, the vehicle is described as a motorcycle 10, but the invention is not limited to a motorcycle, and the vehicle may be a four-wheeled or three-wheeled vehicle. Further, in the embodiment, as shown in FIG. 4, the receiver 81 is provided on the meter panel 37, but the present invention is not limited to this.
For example, it may be provided on a vehicle body frame, a helmet or the like if an alarm is issued, or may be provided on a seat or a helmet if a vibration is used. Although the receiver 81 has been described as a unit for the front wheels 14 (see FIG. 1), the receiver 81 may also be a unit that performs reception for the rear wheels 18 at the same time. Further, in the embodiment, as shown in FIG. 5, the fluctuation value warning means 73 and the detection value warning means 78 are provided on the transmitter 53 side, but the present invention is not limited to this. A transmitter for transmitting tire pressure information may be provided, a receiver for receiving tire pressure information from the transmitter may be provided, and the receiver may process a fluctuation value warning and a fluctuation value warning. According to the present invention, the following effects are exerted by the above-mentioned structure. According to the first aspect of the present invention, a fluctuation value warning unit that issues a warning when a fluctuation value of the tire pressure per unit time exceeds a predetermined fluctuation value threshold value is provided. You can know. As a result, it is possible to take measures at a time when the change in the tire pressure is small.
In addition, since a detection value warning unit that issues a warning when the detection value of the tire pressure falls below a predetermined detection value threshold value is provided, the fluctuation value per unit time of the tire pressure exceeds the predetermined fluctuation value threshold value. Even if a slight air leak occurs, it is possible to know the air pressure abnormality. As a result, the convenience of the driver's tire pressure management can be improved.
【図面の簡単な説明】
【図１】本発明に係るタイヤ空気圧検知装置を搭載した
自動二輪車の側面図
【図２】本発明に係るタイヤ空気圧検知装置を搭載した
自動二輪車のフロント廻りの側面図
【図３】図２の３−３線断面図
【図４】本発明に係るタイヤ空気圧検知装置の受信機を
収納したメータパネル平面図
【図５】本発明に係るタイヤ空気圧検知装置のブロック
図
【図６】本発明に係るタイヤ空気圧検知装置のフロー図
【図７】本発明に係るタイヤ空気圧検知装置の特色を示
すグラフ
【符号の説明】
５０…タイヤ空気圧検出装置、５５…空気圧センサ、７
３…変動値警告手段、７８…検出値警告手段、Ｐｖ1，
Ｐｖ2…変動値しきい値（第１・第２の検出値しきい
値）、Ｐｋ1，Ｐｋ2…検出値しきい値（第１・第２の検
出値しきい値）。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view of a motorcycle equipped with a tire pressure detecting device according to the present invention. FIG. 2 is a side view of a front area of a motorcycle equipped with a tire pressure detecting device according to the present invention. 3 is a sectional view taken along line 3-3 of FIG. 2; FIG. 4 is a plan view of a meter panel in which a receiver of the tire pressure detecting device according to the present invention is housed; FIG. 5 is a block diagram of a tire pressure detecting device according to the present invention; FIG. 6 is a flow chart of a tire pressure detecting device according to the present invention. FIG. 7 is a graph showing characteristics of the tire pressure detecting device according to the present invention.
3: fluctuation value warning means, 78: detection value warning means, Pv1,
Pv2: fluctuation value threshold value (first and second detection value threshold values); Pk1, Pk2: detection value threshold value (first and second detection value threshold values).
Claims (1)
このタイヤ空気圧を認知できるようにしたタイヤ空気圧
検知装置において、 このタイヤ空気圧検知装置は、前記タイヤ空気圧の単位
時間あたりの変動値が所定の変動値しきい値を超えたと
きに警告を発する変動値警告手段と、前記タイヤ空気圧
の検出値が所定の検出値しきい値を下回った時に警告を
発する検出値警告手段と、を備えたことを特徴とするタ
イヤ空気圧検知装置。Claims: 1. A tire pressure is detected by an air pressure sensor,
In the tire pressure detecting device capable of recognizing the tire pressure, the tire pressure detecting device may generate a warning value when a fluctuation value per unit time of the tire pressure exceeds a predetermined fluctuation value threshold value. A tire pressure detecting device, comprising: warning means; and detection value warning means for issuing a warning when the detected value of the tire pressure falls below a predetermined detection value threshold value.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002206937A JP3943454B2 (en) | 2001-12-17 | 2002-07-16 | Tire pressure detector |
| DE60225658T DE60225658T2 (en) | 2001-12-17 | 2002-12-13 | Device for detecting tire pressure |
| EP02027929A EP1319530B1 (en) | 2001-12-17 | 2002-12-13 | Tire pressure detecting system |
| US10/319,607 US7075417B2 (en) | 2001-12-17 | 2002-12-16 | Tire pressure detecting system |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001382808 | 2001-12-17 | ||
| JP2001-382808 | 2001-12-17 | ||
| JP2002206937A JP3943454B2 (en) | 2001-12-17 | 2002-07-16 | Tire pressure detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003246212A true JP2003246212A (en) | 2003-09-02 |
| JP3943454B2 JP3943454B2 (en) | 2007-07-11 |
Family
ID=28676763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002206937A Expired - Fee Related JP3943454B2 (en) | 2001-12-17 | 2002-07-16 | Tire pressure detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3943454B2 (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006160246A (en) * | 2004-12-03 | 2006-06-22 | Goodyear Tire & Rubber Co:The | Sensing method for low leak rate of tire |
| JP2006232031A (en) * | 2005-02-23 | 2006-09-07 | Bridgestone Corp | Center device, and tire information transmitting/receiving method |
| JP2007507388A (en) * | 2003-09-30 | 2007-03-29 | ジョンソン コントロールズ テクノロジー カンパニー | Device for detecting leakage and air decompression of automobile wheels |
| JP2007191047A (en) * | 2006-01-19 | 2007-08-02 | Mitsubishi Motors Corp | Tire air pressure monitoring system |
| JP2007535442A (en) * | 2004-04-29 | 2007-12-06 | ハネウェル・インターナショナル・インコーポレーテッド | Tire pressure leak detection method and system |
| WO2008007531A1 (en) * | 2006-07-10 | 2008-01-17 | Calsonic Kansei Corporation | Tire air pressure monitoring device |
| JP2008512296A (en) * | 2004-09-09 | 2008-04-24 | ピレリ・タイヤ・ソチエタ・ペル・アツィオーニ | Wheel assembly with internal pressure reservoir and pressure change alarm |
| JP2010126042A (en) * | 2008-11-28 | 2010-06-10 | Honda Motor Co Ltd | Tire pneumatic pressure detector |
| JP2012171463A (en) * | 2011-02-21 | 2012-09-10 | Denso Corp | Tire air pressure detector |
| JP2013103658A (en) * | 2011-11-15 | 2013-05-30 | Tokai Rika Co Ltd | Control device of tire air pressure monitoring system |
| CN114454671A (en) * | 2022-03-04 | 2022-05-10 | 南通大学 | Tire self-sealing emergency system based on tire pressure monitoring triggering |
-
2002
- 2002-07-16 JP JP2002206937A patent/JP3943454B2/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007507388A (en) * | 2003-09-30 | 2007-03-29 | ジョンソン コントロールズ テクノロジー カンパニー | Device for detecting leakage and air decompression of automobile wheels |
| JP4809232B2 (en) * | 2003-09-30 | 2011-11-09 | ジョンソン コントロールズ テクノロジー カンパニー | Device for detecting leakage and air decompression of automobile wheels |
| JP2007535442A (en) * | 2004-04-29 | 2007-12-06 | ハネウェル・インターナショナル・インコーポレーテッド | Tire pressure leak detection method and system |
| JP2008512296A (en) * | 2004-09-09 | 2008-04-24 | ピレリ・タイヤ・ソチエタ・ペル・アツィオーニ | Wheel assembly with internal pressure reservoir and pressure change alarm |
| JP2006160246A (en) * | 2004-12-03 | 2006-06-22 | Goodyear Tire & Rubber Co:The | Sensing method for low leak rate of tire |
| JP2006232031A (en) * | 2005-02-23 | 2006-09-07 | Bridgestone Corp | Center device, and tire information transmitting/receiving method |
| JP2007191047A (en) * | 2006-01-19 | 2007-08-02 | Mitsubishi Motors Corp | Tire air pressure monitoring system |
| WO2008007531A1 (en) * | 2006-07-10 | 2008-01-17 | Calsonic Kansei Corporation | Tire air pressure monitoring device |
| JP2010126042A (en) * | 2008-11-28 | 2010-06-10 | Honda Motor Co Ltd | Tire pneumatic pressure detector |
| JP2012171463A (en) * | 2011-02-21 | 2012-09-10 | Denso Corp | Tire air pressure detector |
| JP2013103658A (en) * | 2011-11-15 | 2013-05-30 | Tokai Rika Co Ltd | Control device of tire air pressure monitoring system |
| CN114454671A (en) * | 2022-03-04 | 2022-05-10 | 南通大学 | Tire self-sealing emergency system based on tire pressure monitoring triggering |
| CN114454671B (en) * | 2022-03-04 | 2022-12-27 | 南通大学 | Tire self-sealing emergency system based on tire pressure monitoring triggering |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3943454B2 (en) | 2007-07-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3943454B2 (en) | Tire pressure detector | |
| JP4180802B2 (en) | Tire pressure detector | |
| US7075417B2 (en) | Tire pressure detecting system | |
| JP4611537B2 (en) | In-vehicle tire pressure detector | |
| JP4554827B2 (en) | Wheel pressure sensor mounting structure | |
| JP3938522B2 (en) | Tire pressure detector | |
| CA2367180C (en) | Air pressure detection device for wheel | |
| JP3904155B2 (en) | Remote tire pressure monitoring system | |
| JP4558959B2 (en) | Wheel pressure detector mounting structure | |
| EP1447244B1 (en) | Mounting structure of tire pressure sensing system | |
| US6838984B2 (en) | Air pressure detection device for wheel | |
| JP2003182324A (en) | Detector for tire pressure | |
| US6972673B2 (en) | Air pressure detecting device for wheel | |
| CA2141303A1 (en) | Method and devices for sensing the engagement of a tire on a safety ring | |
| CA2413987C (en) | Tire pressure fluctuation detecting system | |
| WO2004005052A3 (en) | Tyre wear indicator | |
| JP4266278B2 (en) | Wheel pressure detector | |
| ATE556867T1 (en) | WHEEL WITH PLASTIC RIM AND INTEGRATED SENSOR | |
| JP4620292B2 (en) | Tire pressure detector | |
| JP2003182323A (en) | Tyre pneumatic pressure sensing system, tyre and tyre pneumatic pressure sensor device | |
| TWI801889B (en) | Detector for bicycle | |
| JP2005105507A (en) | Helmet with apparatus for detecting tire status | |
| JP5171389B2 (en) | Pressure alarm device and pressure alarm system | |
| JPH07179108A (en) | Device for detecting tire condition | |
| JP2010280389A (en) | Wheel pneumatic pressure sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20041202 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20060822 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20060905 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20061013 |
|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20061219 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20070219 |
|
| A911 | Transfer to examiner for re-examination before appeal (zenchi) |
Free format text: JAPANESE INTERMEDIATE CODE: A911 Effective date: 20070223 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20070403 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20070405 |
|
| R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110413 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110413 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130413 Year of fee payment: 6 |
|
| LAPS | Cancellation because of no payment of annual fees |