JP3190469B2 - Fuel tank internal pressure sensor mounting structure - Google Patents
Fuel tank internal pressure sensor mounting structureInfo
- Publication number
- JP3190469B2 JP3190469B2 JP03785793A JP3785793A JP3190469B2 JP 3190469 B2 JP3190469 B2 JP 3190469B2 JP 03785793 A JP03785793 A JP 03785793A JP 3785793 A JP3785793 A JP 3785793A JP 3190469 B2 JP3190469 B2 JP 3190469B2
- Authority
- JP
- Japan
- Prior art keywords
- internal pressure
- pressure sensor
- fuel
- fuel tank
- mounting
- 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.)
- Expired - Fee Related
Links
Description
【０００１】[0001]
【産業上の利用分野】本発明は燃料タンクに内圧センサ
を取付ける技術の改良に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in technology for mounting an internal pressure sensor on a fuel tank.
【０００２】[0002]
【従来の技術】例えば特開平４−１５３５５３号の蒸発
燃料処理装置において、燃料タンク内で発生した燃料蒸
気の状態や蒸発燃料処理装置の異常を検出するために、
燃料タンクの内圧を計測する内圧センサを付設する必要
がある。同号の第２図では内圧センサに相当する圧力セ
ンサ３０はベーパ通路２８の途中の設けられている。ま
た、従来から広く採用されている内圧センサの取付構造
を図５で説明する。2. Description of the Related Art For example, in an evaporative fuel processing apparatus disclosed in Japanese Patent Laid-Open No. 4-153553, in order to detect a state of fuel vapor generated in a fuel tank and an abnormality of the evaporative fuel processing apparatus,
It is necessary to attach an internal pressure sensor for measuring the internal pressure of the fuel tank. In FIG. 2 of the same publication, a pressure sensor 30 corresponding to an internal pressure sensor is provided in the middle of the vapor passage 28. FIG. 5 illustrates a mounting structure of an internal pressure sensor that has been widely used in the related art.
【０００３】図５は従来の内圧センサ取付状態図であ
り、燃料タンク１０１の上部にパイプ１０２を立て、こ
のパイプ１０２に結合ホース１０３の下端を差込み、こ
の結合ホース１０３の上端に内圧センサ１０４を取付け
てなる。FIG. 5 is a diagram showing a state in which a conventional internal pressure sensor is mounted. A pipe 102 is set up on a fuel tank 101, a lower end of a connecting hose 103 is inserted into the pipe 102, and an internal pressure sensor 104 is mounted on an upper end of the connecting hose 103. Be attached.
【０００４】[0004]
【発明が解決しようとする課題】図５の構造の場合、立
ち上がり寸法が大きくなるため、結合ホース１０３や内
圧センサ１０４を納めるスペースを確保する必要があ
り、そのために内圧センサ１０４のレイアウトは制限さ
れる。また、結合ホース１０３をフレキシブルホースと
した場合は、内圧センサ１０４を車体側にサポートしな
ければなるず、取付構造が複雑になる。さらに、結合ホ
ース１０３等部品点数が多い。そこで本発明の目的は内
圧センサ取付構造のコンパクト化を図ることにある。In the case of the structure shown in FIG. 5, since the rising dimension becomes large, it is necessary to secure a space for accommodating the connecting hose 103 and the internal pressure sensor 104. Therefore, the layout of the internal pressure sensor 104 is limited. You. When the connecting hose 103 is a flexible hose, the internal pressure sensor 104 must be supported on the vehicle body side, and the mounting structure is complicated. Furthermore, the number of parts such as the connecting hose 103 is large. Therefore, an object of the present invention is to reduce the size of the internal pressure sensor mounting structure.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するべく
本発明は、燃料タンク内の燃料の量を計測するフューエ
ルメータユニットを燃料タンクに取付けるための取付プ
レートに、内圧センサ取付座を設け、この内圧センサ取
付座に燃料タンクの内圧を計測する内圧センサを取付
け、取付プレートの下面に、内圧センサのセンシング部
の導圧孔に燃料が侵入するのを防止する為の遮蔽板を、
導圧孔に対して略直交するように取付ける。To achieve the above object, the present invention provides an internal pressure sensor mounting seat on a mounting plate for mounting a fuel meter unit for measuring an amount of fuel in a fuel tank to the fuel tank. An internal pressure sensor that measures the internal pressure of the fuel tank is mounted on the internal pressure sensor mounting seat, and the sensing section of the internal pressure sensor is mounted on the lower surface of the mounting plate.
A shielding plate to prevent fuel from entering the pressure
It is installed so as to be substantially perpendicular to the pressure guide hole .
【０００６】上記内圧センサを、Ｏリング等のシール材
を介して内圧センサ取付座に水蜜に取付けるとよい。It is preferable that the internal pressure sensor is attached to the internal pressure sensor mounting seat via a sealing material such as an O-ring.
【０００７】[0007]
【作用】燃料タンクに取付プレートを取付ける。取付プ
レートに取付けられているフューエルメータユニットで
燃料タンクの燃料の量を計測する。取付プレートに取付
けられた内圧センサで燃料タンクの内圧を計測する。そ
して、遮蔽板で内圧センサのセンシング部に燃料が掛か
ることを防ぐ。[Function] A mounting plate is attached to the fuel tank. Measure the amount of fuel in the fuel tank with a fuel meter unit mounted on the mounting plate. An internal pressure sensor mounted on the mounting plate measures the internal pressure of the fuel tank. Then, the fuel is prevented from being applied to the sensing part of the internal pressure sensor by the shielding plate.
【０００８】[0008]
【実施例】本発明の実施例を添付図面に基づいて以下に
説明する。なお、図面は符号の向きに見るものとする。
図１は本発明に係る燃料タンクの配置図であり、車体１
の後部に燃料タンク２が配置され、燃料は燃料ポンプユ
ニット４、燃料供給パイプ５、フィルタ６、燃料噴射器
７を介してエンジン８の燃焼室に供給される。９は燃料
戻しパイプ、１０は燃料蒸気パイプである。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments 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 layout view of a fuel tank according to the present invention, and shows a vehicle body 1.
A fuel tank 2 is disposed at the rear of the engine, and fuel is supplied to a combustion chamber of an engine 8 via a fuel pump unit 4, a fuel supply pipe 5, a filter 6, and a fuel injector 7. 9 is a fuel return pipe, and 10 is a fuel vapor pipe.
【０００９】燃料タンク２への給油はフィラキャップ１
２を開け、そこに給油ガン等を差込むことで実施され
る。燃料タンク２の上部には前記燃料ポンプユニット４
の他に、フューエルメータユニット２０が取付けられて
いる。上記燃料ポンプユニット４およびフューエルメー
タユニット２０は、例えば後部下部室外に配置されてお
り、リヤシートバック後部のメンテナンスリッド１３，
１４を開けることで、燃料タンク２を取り外すこと無く
燃料ポンプユニット４およびフューエルメータユニット
２０の脱着及び点検が可能な構造となっている。The fuel tank 2 is supplied with filler cap 1
2 is opened and a refueling gun is inserted into it. In the upper part of the fuel tank 2, the fuel pump unit 4
In addition, a fuel meter unit 20 is attached. The fuel pump unit 4 and the fuel meter unit 20 are arranged, for example, outside the rear lower part of the room.
By opening 14, the fuel pump unit 4 and the fuel meter unit 20 can be detached and inspected without removing the fuel tank 2.
【００１０】図２は本発明に係るフューエルメータユニ
ットで切断した燃料タンクの断面図であり、中空構造の
燃料タンク２の上部にフューエルメータユニット２０が
取付けられ、その上方にメンテナンスリッド１４が配置
されていることを示す。フューエルメータユニット２０
は燃料タンク２内部の燃料のレベルを図るためのフロー
ト式レベル計２３と、燃料タンク２の内部の圧力を計測
する内圧センサ４０（図３参照）とを含むものであり、
以下にその構成を詳しく説明する。FIG. 2 is a sectional view of the fuel tank cut by the fuel meter unit according to the present invention. The fuel meter unit 20 is mounted on the upper part of the fuel tank 2 having a hollow structure, and the maintenance lid 14 is disposed above the fuel meter unit 20. To indicate that Fuel meter unit 20
Includes a float type level meter 23 for measuring the fuel level inside the fuel tank 2 and an internal pressure sensor 40 (see FIG. 3) for measuring the pressure inside the fuel tank 2.
The configuration will be described below in detail.
【００１１】図３は本発明に係るフューエルメータユニ
ットの分解斜図であり、フューエルメータユニット２０
は、円板状の取付プレート２１に上記フロート式レベル
計２３と内圧センサ４０とが取付けられたもので、う
ち、フロート式レベル計２３はレベル計用カプラ２４
と、ステー２５と、フロート用の第１アーム２６と、フ
ロート用の第２アーム２８と、フロート２９と、第１ア
ーム２６から延設された第３アーム３０およびローラ３
１とからなる。ローラ３１は図２に示すとおり、燃料タ
ンク２の底に当接して第１アーム２６の位置を規定す
る。フロート２９は第１アーム２６の下端を揺動中心と
して上下に揺動し、燃料のレベルに対応した信号をカプ
ラ２４を経由して制御系へ送る。FIG. 3 is an exploded perspective view of the fuel meter unit according to the present invention.
Is a type in which the float type level meter 23 and the internal pressure sensor 40 are mounted on a disk-shaped mounting plate 21, wherein the float type level meter 23 is a level meter coupler 24.
, A stay 25, a first arm 26 for a float, a second arm 28 for a float, a float 29, a third arm 30 extended from the first arm 26, and a roller 3.
It consists of 1. The roller 31 contacts the bottom of the fuel tank 2 to define the position of the first arm 26 as shown in FIG. The float 29 swings up and down with the lower end of the first arm 26 as the swing center, and sends a signal corresponding to the fuel level to the control system via the coupler 24.
【００１２】また、内圧センサ４０は図３に示す取付プ
レート２１に設けられた内圧センサ取付座４１にビス４
２，４２で固定される。内圧センサ４０は例えば箱状の
ケーシング４０ａの内部に図示せぬダイヤフラムを張
り、ケーシング４０ａの底にセンシング部４０ｂを突起
し、このセンシング部４０ｂに導圧孔４０ｃ（図４参
照）を開け、ケーシング４０ａの上部に大気圧チューブ
４３を取付け、ケーシング４０ａの横から信号線を内圧
センサ用カプラ４４を介して取出してなり、下からの燃
料タンク内圧と上からの大気圧との差をダイヤフラムの
機械的移動で計測し、電気信号に変換してカプラ４４を
介して制御系へ送る。An internal pressure sensor 40 is mounted on an internal pressure sensor mounting seat 41 provided on the mounting plate 21 shown in FIG.
Fixed at 2,42. For example, the internal pressure sensor 40 extends a diaphragm (not shown) inside a box-shaped casing 40a, protrudes a sensing portion 40b at the bottom of the casing 40a, and opens a pressure guiding hole 40c (see FIG. 4) in the sensing portion 40b. Atmospheric pressure tube 43 is attached to the upper part of 40a, and a signal line is taken out from the side of casing 40a through coupler for internal pressure sensor 44, and the difference between the fuel tank internal pressure from below and the atmospheric pressure from above is determined by a diaphragm machine. It is measured by dynamic movement, converted into an electric signal, and sent to the control system via the coupler 44.
【００１３】上記大気圧チューブ４３の他端は、トラン
クルームまたは室内まで導かれている。大気圧チューブ
４３に、水やゴミが入ることを防止するためである。ま
た、室内まで導いた場合には、室内が空気調和機でほぼ
一定の温度に保たれているので内圧センサ４０の精度向
上が図れる。The other end of the atmospheric pressure tube 43 is led to a trunk room or a room. This is to prevent water and dust from entering the atmospheric pressure tube 43. Further, when the room is guided to the room, the room is maintained at a substantially constant temperature by the air conditioner, so that the accuracy of the internal pressure sensor 40 can be improved.
【００１４】図３において燃料タンク２の上部開口２ａ
を囲むように取付けられたリングプレート４６のスタッ
ドボルト４７…に取付プレート２１のボルト穴２１ａ…
を挿通し、パッキン４８（図２参照）を介してナット４
９…で締めることで、燃料タンク２への取付プレート２
１の取付けは完了する。In FIG. 3, the upper opening 2a of the fuel tank 2 is shown.
Are attached to the stud bolts 47 of the ring plate 46 attached so as to surround the bolt holes 21a of the mounting plate 21.
Through the nut 4 through the packing 48 (see FIG. 2).
Mounting plate 2 to fuel tank 2
1 is completed.
【００１５】図４は本発明に係る内圧センサの遮蔽板を
示す図であり、取付プレート２１の下面に、適当に折り
曲げ形成した遮蔽板５０を取付け、下から内圧センサ４
０のセンシング部４０ｂを直接臨めないようにしてい
る。センシング部４０ｂの導圧孔４０ｃに燃料が侵入す
ると正しい圧力が測れなくなるが、遮蔽板５０は下方の
燃料がセンシング部４０ｂに掛ることを防止し、内圧セ
ンサ４０の精度を良好に保つ。また、図示するとおり内
圧センサ４０のセンシング部４０ｂは、Ｏリング等のシ
ール材５２を介して、内圧センサ取付座４１に水蜜に取
付けられている。ここで水蜜とは水漏テストで水の漏れ
が無い程度に密封されている状態を意味する。FIG. 4 is a view showing a shield plate of the internal pressure sensor according to the present invention. A shield plate 50 appropriately bent and formed is mounted on the lower surface of the mounting plate 21, and the internal pressure sensor 4 is mounted from below.
The zero sensing unit 40b is prevented from directly approaching. When fuel enters the pressure guide hole 40c of the sensing part 40b, correct pressure cannot be measured. However, the shielding plate 50 prevents the fuel below from being applied to the sensing part 40b, and keeps the accuracy of the internal pressure sensor 40 good. As shown in the figure, the sensing part 40b of the internal pressure sensor 40 is attached to the internal pressure sensor mounting seat 41 via a sealing member 52 such as an O-ring. Here, the nectar means a state in which the nectar is sealed to such an extent that no water leaks in the water leak test.
【００１６】以上の構成からなる内圧センサ取付座を備
えた取付プレートの作用を次に述べる。図３に示すとお
り、取付プレート２１にレベル計２３および内圧センサ
４０を取付け、この取付プレート２１を燃料タンク２の
上部の開口２ａに取付け、カプラ２４，４４を結合すれ
ばよい。このように１個の取付プレート２１に燃料レベ
ル計２３と内圧センサ４０とを取付け可能にしたことを
特徴とし、その結果、従来の内圧センサのための結合ホ
ースやブラケットを省略できる。さらに、既存の取付プ
レートと同形の取付プレート２１に内圧センサ取付座４
１を付設するだけでよいので、燃料タンク２に特別のパ
イプ（図５のパイプ１０２に相当）を設ける必要が無
い。The operation of the mounting plate having the above-structured internal pressure sensor mounting seat will now be described. As shown in FIG. 3, the level gauge 23 and the internal pressure sensor 40 are mounted on the mounting plate 21, the mounting plate 21 is mounted on the upper opening 2a of the fuel tank 2, and the couplers 24 and 44 may be connected. As described above, the fuel level gauge 23 and the internal pressure sensor 40 can be mounted on one mounting plate 21. As a result, a connecting hose and a bracket for the conventional internal pressure sensor can be omitted. Further, the internal pressure sensor mounting seat 4 is mounted on a mounting plate 21 having the same shape as the existing mounting plate.
1 only needs to be attached, so that there is no need to provide a special pipe (corresponding to the pipe 102 in FIG. 5) in the fuel tank 2.
【００１７】なお、本発明は燃料タンク２の上部に、燃
料満杯時にも空気層が確保されていることに着目して、
この部分に圧力センサ４０を取付けたことを特徴とする
が、、図４の遮蔽板５０を設ければ車の急旋回、急発
進、急停止に際しても圧力センシング部に燃料が掛るこ
とを防止できる。The present invention focuses on the fact that an air layer is secured above the fuel tank 2 even when the fuel is full,
The pressure sensor 40 is attached to this part. However, if the shield plate 50 shown in FIG. 4 is provided, fuel can be prevented from being applied to the pressure sensing part even when the vehicle makes a sharp turn, suddenly starts, and suddenly stops. .
【００１８】[0018]
【発明の効果】以上に述べた通り本発明は、１個の取付
プレートに燃料レベル計と内圧センサとを取付け可能に
したことを特徴とし、その結果、従来の内圧センサのた
めの結合ホースやブラケットを省略でき、さらに、既存
の取付プレートに圧力センサ取付座を付設するだけでよ
いので、燃料タンクに特別のパイプを設ける必要が無い
ので、内圧センサの取付に伴う部品数の増加を防止で
き、かつ取付スペースを小さくすることができるととも
に、本発明は取付プレートの下面に、且つ導圧孔に対し
て略直交するように遮蔽板を設けたので、車の急旋回、
急発進、急停止に際しても圧力センシング部に燃料が侵
入することを防止でき、内圧センサの信頼性を維持する
ことができる。As described above, the present invention is characterized in that the fuel level gauge and the internal pressure sensor can be mounted on one mounting plate. Since the bracket can be omitted and the existing mounting plate only needs to be provided with the pressure sensor mounting seat, there is no need to provide a special pipe in the fuel tank, so it is possible to prevent an increase in the number of parts associated with mounting the internal pressure sensor. And the present invention can reduce the mounting space, and the present invention can be applied to the lower surface of the mounting plate and to the pressure guiding hole.
Because the shield plate is provided so as to be substantially orthogonal ,
Even when the vehicle suddenly starts or stops, fuel invades the pressure sensing section.
Can be prevented from entering, it is possible to maintain the reliability of the pressure sensor.
【００１９】内圧センサをシール材を介して燃料タンク
側の内圧センサ取付座に取付ければ脱着が容易で、気密
性が良好に保持できれる。If the internal pressure sensor is mounted on the internal pressure sensor mounting seat on the fuel tank side via a sealing material, the internal pressure sensor can be easily attached and detached, and good airtightness can be maintained.
【図１】本発明に係る燃料タンクの配置図FIG. 1 is a layout view of a fuel tank according to the invention.
【図２】本発明に係るフューエルメータユニットで切断
した燃料タンクの断面図FIG. 2 is a sectional view of the fuel tank cut by the fuel meter unit according to the present invention.
【図３】本発明に係るフューエルメータユニットの分解
斜図FIG. 3 is an exploded perspective view of the fuel meter unit according to the present invention.
【図４】本発明に係る内圧センサの遮蔽板を示す図FIG. 4 is a view showing a shield plate of the internal pressure sensor according to the present invention.
【図５】従来の内圧センサ取付状態図FIG. 5 is a diagram showing a state of mounting a conventional internal pressure sensor
１…車体、２…燃料タンク、２０…フューエルメータユ
ニット、２１…取付プレート、２３…フロート式レベル
計、２９…フロート、４０…内圧センサ、４１…内圧セ
ンサ取付座、４３…大気圧チューブ、５０…遮蔽板、５
２…シール材。DESCRIPTION OF SYMBOLS 1 ... Body, 2 ... Fuel tank, 20 ... Fuel meter unit, 21 ... Mounting plate, 23 ... Float type level meter, 29 ... Float, 40 ... Internal pressure sensor, 41 ... Internal pressure sensor mounting seat, 43 ... Atmospheric pressure tube, 50 ... Shielding plate, 5
2. Sealing material.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 鈴木 武 埼玉県和光市中央１丁目４番１号 株式 会社本田技術研究所内 (72)発明者 小林 誠 埼玉県和光市中央１丁目４番１号 株式 会社本田技術研究所内 (72)発明者 澤田 健一 埼玉県和光市中央１丁目４番１号 株式 会社本田技術研究所内 (56)参考文献 特開 平４−325316（ＪＰ，Ａ) 特開 平２−108938（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) F02B 77/08 F02M 25/08 F02M 37/00 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Takeshi Suzuki 1-4-1 Chuo, Wako-shi, Saitama Pref. Inside of Honda R & D Co., Ltd. (72) Inventor Makoto Kobayashi 1-4-1 Chuo, Wako-shi, Saitama Pref. Inside the Honda R & D Co., Ltd. (72) Kenichi Sawada 1-4-1 Chuo, Wako-shi, Saitama Pref. Inside the Honda R & D Co., Ltd. (56) References JP-A-4-325316 (JP, A) JP-A-2- 108938 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) F02B 77/08 F02M 25/08 F02M 37/00
Claims (2)
ーエルメータユニットを燃料タンクに取付けるための取
付プレートに、内圧センサ取付座を設け、この内圧セン
サ取付座に燃料タンクの内圧を計測する内圧センサを取
付け、前記取付プレートの下面に、内圧センサのセンシ
ング部の導圧孔に燃料が侵入するのを防止する為の遮蔽
板を、導圧孔に対して略直交するように取付けたことを
特徴とする燃料タンクの内圧センサ取付構造。An internal pressure sensor mounting seat is provided on a mounting plate for mounting a fuel meter unit for measuring an amount of fuel in the fuel tank to the fuel tank, and the internal pressure for measuring the internal pressure of the fuel tank is provided on the internal pressure sensor mounting seat. A shield for mounting a sensor and preventing fuel from entering the pressure guide hole of the sensing part of the internal pressure sensor on the lower surface of the mounting plate.
An internal pressure sensor mounting structure for a fuel tank, wherein the plate is mounted so as to be substantially perpendicular to the pressure guiding hole .
を介して内圧センサ取付座に水蜜に取付けられているこ
とを特徴とする請求項１記載の燃料タンクの内圧センサ
取付構造。2. The internal pressure sensor mounting structure for a fuel tank according to claim 1, wherein the internal pressure sensor is mounted on the internal pressure sensor mounting seat via a sealing material such as an O-ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03785793A JP3190469B2 (en) | 1993-02-26 | 1993-02-26 | Fuel tank internal pressure sensor mounting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03785793A JP3190469B2 (en) | 1993-02-26 | 1993-02-26 | Fuel tank internal pressure sensor mounting structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06248973A JPH06248973A (en) | 1994-09-06 |
| JP3190469B2 true JP3190469B2 (en) | 2001-07-23 |
Family
ID=12509218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03785793A Expired - Fee Related JP3190469B2 (en) | 1993-02-26 | 1993-02-26 | Fuel tank internal pressure sensor mounting structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3190469B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004081506A2 (en) | 2003-03-13 | 2004-09-23 | Electrovac Fabrikation Elektrotechnischer Spezialartikel Gmbh | Sealed sensor housing |
| JP6070942B2 (en) * | 2013-03-18 | 2017-02-01 | 三菱自動車工業株式会社 | Member mounting structure |
| WO2018191240A1 (en) * | 2017-04-10 | 2018-10-18 | Eaton Corporation | Vapor pressure sensor assembly |
-
1993
- 1993-02-26 JP JP03785793A patent/JP3190469B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06248973A (en) | 1994-09-06 |
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