JPH0536178Y2 - - Google Patents
Info
- Publication number
- JPH0536178Y2 JPH0536178Y2 JP7376588U JP7376588U JPH0536178Y2 JP H0536178 Y2 JPH0536178 Y2 JP H0536178Y2 JP 7376588 U JP7376588 U JP 7376588U JP 7376588 U JP7376588 U JP 7376588U JP H0536178 Y2 JPH0536178 Y2 JP H0536178Y2
- Authority
- JP
- Japan
- Prior art keywords
- liquid level
- installation chamber
- detector
- resistor
- fuel
- 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 - Lifetime
Links
- 239000007788 liquid Substances 0.000 claims description 41
- 238000009434 installation Methods 0.000 claims description 33
- 239000002828 fuel tank Substances 0.000 claims description 7
- 239000000919 ceramic Substances 0.000 claims description 6
- 239000000758 substrate Substances 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 2
- 239000000446 fuel Substances 0.000 description 17
- 235000014676 Phragmites communis Nutrition 0.000 description 13
- 239000004020 conductor Substances 0.000 description 6
- 230000005856 abnormality Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
Landscapes
- Level Indicators Using A Float (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は、液面検出器、特に自動車の燃料タン
クの底部に突部が形成されて、タンク内底部が突
部で区分されている双胴型燃料タンクに用いられ
る液面検出器に関するものである。[Detailed description of the invention] [Industrial application field] The present invention is a liquid level detector, particularly a fuel tank of an automobile, in which a protrusion is formed at the bottom, and the inner bottom of the tank is divided by the protrusion. This invention relates to a liquid level detector used in a body-type fuel tank.
〔従来の技術〕
従来のこの種の自動車用燃料タンク用液面検出
器として、例えば第２図に示すようなものがあ
る。この自動車用燃料タンク１は、その燃料タン
ク底部１ａに突部１ｂが形成された双胴型のタン
クであつて、その突部１ｂにより、ポンプ２を設
置した設置室３ａと、ポンプ２を設置しない非設
置室３ｂとに区分されている。またその設置室３
ａには、上記のポンプ２に接続される吐出管４及
びエンジンで燃焼されなかつた余分な燃料が戻さ
れるリターンチユーブ５が配管されており、この
リターンチユーブ５の途中にはジエツトポンプ６
が取付けられている。このポンプ６には導液管７
が分岐状態で取り付けられており、この導液管７
の先端開口部にはフイルター８が取り付けられて
該フイルター８が上記の非設置室３ｂの内底部に
位置されている。これにより、燃料がリターンチ
ユーブ５を介してタンク１内に戻されるとき、導
液管７を介して非設置室３ｂ内の燃料が設置室３
ａに送られるようになつているものである。９，
９′は、液面検出器本体であつて、その一方の液
面検出器本体９は、設置室３ａ内に位置されてお
り、また他方の液面検出器本体９′は非設置室３
ｂ内に位置されている。そしてタンク１内の燃料
の液面レベルが降下して、突部１ｂの頂部に達す
るまでは、両液面検出器本体９，９′が同様のレ
ベル信号を出すが、液面がレベルＢ以下に低下す
ると、ポンプ６が動作して非設置室３ｂ内の燃料
から消費し、この非設置室３ｂ内の液面レベルを
液面検出器本体９′で検出し、その非設置室３ｂ
が空になつたところで設置室３ａ内の液面レベル
を液面検出器本体９で検出するようになつてい
る。１０は細孔１１が穿設されており、しかも突
部１ａ上に設けられている仕切板であつて、この
仕切板１０によつて車体に加速度（横Ｇ）や傾斜
が加わつたときの液面の変動による検出誤差を抑
制しフロート１２の上下動に伴う指示計器（図示
せず）の針振れを防止するように構成されてい
る。１３は燃料注入口を示す。[Prior Art] As a conventional liquid level detector of this type for an automobile fuel tank, there is one shown in FIG. 2, for example. This automobile fuel tank 1 is a double-barreled tank in which a protrusion 1b is formed at the bottom 1a of the fuel tank, and the protrusion 1b forms an installation chamber 3a in which the pump 2 is installed, and an installation chamber 3a in which the pump 2 is installed. It is divided into a non-installation room 3b and a non-installation room 3b. Also, its installation room 3
A is connected to a discharge pipe 4 connected to the pump 2 and a return tube 5 to which excess fuel not burned by the engine is returned, and a jet pump 6 is installed in the middle of the return tube 5.
is installed. This pump 6 has a liquid guide pipe 7.
is installed in a branched state, and this liquid guide pipe 7
A filter 8 is attached to the opening at the tip thereof, and the filter 8 is located at the inner bottom of the non-installation chamber 3b. As a result, when the fuel is returned into the tank 1 via the return tube 5, the fuel in the non-installation chamber 3b is transferred to the installation chamber 3b via the liquid guide pipe 7.
It is designed to be sent to a. 9,
9' is a liquid level detector body, one of which is located in the installation chamber 3a, and the other liquid level detector body 9' is located in the non-installation chamber 3.
It is located within b. Then, until the liquid level of the fuel in the tank 1 falls and reaches the top of the protrusion 1b, both liquid level detector bodies 9 and 9' output the same level signal, but the liquid level is lower than level B. When the liquid level decreases to 1, the pump 6 operates and consumes the fuel in the non-installed chamber 3b, and the liquid level in the non-installed chamber 3b is detected by the liquid level detector body 9', and the liquid level in the non-installed chamber 3b is detected.
When the chamber becomes empty, the liquid level in the installation chamber 3a is detected by the liquid level detector main body 9. Reference numeral 10 denotes a partition plate in which pores 11 are perforated, and which is provided on the protrusion 1a. It is configured to suppress detection errors due to surface fluctuations and prevent needle deflection of an indicator (not shown) due to vertical movement of the float 12. 13 indicates a fuel injection port.
このような従来の液面検出器にあつては、その
非設置室３ｂ内に設備される液面検出器本体９′
は可変抵抗器を備えているために、この可変抵抗
器において、接触不良を起せば誤指示が生じる危
険性がある。 In the case of such a conventional liquid level detector, the liquid level detector main body 9' installed in the non-installation chamber 3b is
Since it is equipped with a variable resistor, there is a risk that a faulty contact may occur in this variable resistor, resulting in an erroneous indication.
この誤指示の危険性を防止するために、第３図
に示すように、非設置室３ｂ内に、リードスイツ
チ１４と、該リードスイツチ１４を開閉動作させ
るための磁性体を取付けたフロート１２′で構成
される液面検出器本体１５を備え、タンク１内の
燃料の消費に伴なつて、非設置室３ｂ内の燃料が
費されると、フロート１２′が降下し、それに伴
なつてリードスイツチ１４はオフとなる。リード
スイツチ１４がオフとなれば、指示電流は抵抗１
６に流れるために、その抵抗１６の値により液量
指示計はＥ点に近い指示となるように構成されて
いる。１７は補正抵抗を示す。 In order to prevent this risk of erroneous indication, as shown in FIG. 3, a reed switch 14 and a float 12' equipped with a magnetic material for opening and closing the reed switch 14 are installed in the non-installation chamber 3b. When the fuel in the non-installation chamber 3b is used up as the fuel in the tank 1 is consumed, the float 12' is lowered and the lead is lowered accordingly. Switch 14 is turned off. When the reed switch 14 is turned off, the indicated current changes to the resistance 1.
6, the liquid level indicator is configured to indicate a value close to point E depending on the value of the resistance 16. 17 indicates a correction resistor.
ところが、このように非設置室３ｂに、１個の
リードスイツチ１４とそのリードスイツチ１４を
動作せしめるための１個のフロート１２′とから
なる１組の液面検出器本体１５を設置したものに
あつては、非設置室３ｂ内の燃料の有無しか判ら
ず、非設置室３ｂ内の残液量を検知することが不
可能である。 However, when a set of liquid level detector main body 15 consisting of one reed switch 14 and one float 12' for operating the reed switch 14 is installed in the non-installation chamber 3b as described above, In this case, only the presence or absence of fuel in the non-installed chamber 3b can be determined, and it is impossible to detect the amount of remaining liquid in the non-installed chamber 3b.
そこで、例えば第１図に示すように非設置室３
ｂ内に複数組（３組）の液面検出器本体を上下に
段設して、これら液面検出器本体の動作により、
非設置室３ｂ内の残液量を検知することができる
ようにする液面検出器の開発が要望されている。 Therefore, for example, as shown in Fig. 1,
A plurality of sets (3 sets) of liquid level detector bodies are arranged vertically in b, and by the operation of these liquid level detector bodies,
There is a demand for the development of a liquid level detector that can detect the amount of liquid remaining in the non-installed chamber 3b.
ところがこのように、複数組の液面検出器本体
を非設置室に設備するものにあつては、その複数
組の液面検出器本体に対応する複数の抵抗体を設
けなければならず、またその非設置室からの燃料
移送路に流れを遮断するような異常が発生したと
き、指示計がＥ点以下を指示されるようにする抵
抗体を接続しなければならない等のことで使用抵
抗体数が増大し、さらにはそれら抵抗体を接続す
るための回路構成が複雑となりしかも回路全体が
大型化されてスペース効率が悪くなるといつた問
題点が生じる。
However, when multiple sets of liquid level detector bodies are installed in a non-installed room, multiple resistors must be provided corresponding to the multiple sets of liquid level detector bodies, and When an abnormality occurs in the fuel transfer path from the non-installed room that interrupts the flow, it is necessary to connect a resistor that will cause the indicator to indicate a value below point E. Problems arise in that the number of resistors increases, and furthermore, the circuit configuration for connecting these resistors becomes complicated, and the entire circuit becomes larger, resulting in poor space efficiency.
本考案はかかる問題点に着目してなされたもの
で複数の検出器本体に接続すべき複数の抵抗体等
を一枚のセラミツク基板上に厚膜焼成した集積回
路を用いることにより、使用部品点数の削減、構
成の小型化を可能ならしめることができる液面検
出器を提供することにある。
The present invention was developed with an eye on this problem, and by using an integrated circuit in which multiple resistors, etc. to be connected to multiple detector bodies are fired as a thick film on a single ceramic substrate, the number of parts used can be reduced. The object of the present invention is to provide a liquid level detector that can reduce the amount of noise and downsize the structure.
以下に本考案を第１図に示す実施例に基いて詳
細に説明する。
The present invention will be explained in detail below based on the embodiment shown in FIG.
２０は、底面に突部２０ａが形成されて、その
突部２０ａを境にポンプの設置室２１ａと非設置
室２１ｂとに区分形成されている双胴型のタンク
であつて、その設置室２１ａには、液面に追従す
るフロートに組込まれたフロート接点２２、この
フロート接点２２が摺動される抵抗体２３、導体
２４及びアース用導体２５を具備せしめてなるバ
ーチカル式メイン検出器本体２６が配置されてお
り、また非設置室２１ｂには液面に追従するフロ
ートに組込まれたマグネツト２７、このマグネツ
トの移動方向に配置された３個のリードスイツチ
２８ａ，２８ｂ，２８ｃを配置してなるサブ検出
器本体２９が配置されている。３０は、厚膜集積
回路を構成するセラミツク基板であつて、このセ
ラミツク基板３０には、サブ検出器本体２９の出
力抵抗値である抵抗体３１ａ，３１ｂ，３１ｃ，
３２と、メイン検出器本体２６の出力抵抗値を補
正する抵抗体３３ａ，３３ｂと、非設置室２１ｂ
内の燃料が、設置室２１ａ側に送られない異常が
発生したときであつても、設置室２１ａ内の燃料
がなくなれば指示計がＥ点を指すようにするため
の抵抗値を有する抵抗体３４が燃成されているも
のである。 Reference numeral 20 is a double-hulled tank having a protrusion 20a formed on the bottom surface and divided into a pump installation chamber 21a and a pump non-installation chamber 21b with the protrusion 20a as a boundary. , there is a vertical main detector body 26 comprising a float contact 22 built into a float that follows the liquid level, a resistor 23 on which the float contact 22 slides, a conductor 24, and a grounding conductor 25. In addition, in the non-installation chamber 21b, there is a sub-unit consisting of a magnet 27 built into a float that follows the liquid level, and three reed switches 28a, 28b, and 28c arranged in the direction of movement of this magnet. A detector main body 29 is arranged. 30 is a ceramic substrate constituting a thick film integrated circuit, and this ceramic substrate 30 has resistors 31a, 31b, 31c, which are output resistance values of the sub-detector main body 29.
32, resistors 33a and 33b for correcting the output resistance value of the main detector body 26, and a non-installation chamber 21b.
A resistor having a resistance value so that the indicator points to point E when the fuel in the installation chamber 21a runs out even when an abnormality occurs in which the fuel in the installation chamber 21a is not sent to the installation chamber 21a side. 34 is combusted.
以上が本実施例よりなる液面検出器の回路構成
であるが、次にその作用について述べると、双胴
型の燃料タンク２０に取付けられているメイン検
出器本体２６と、サブ検出器本体２９の出力抵抗
値はパラレルに接続され、その合成抵抗によつて
燃料計の指針を振らせる。メイン検出器本体２６
の抵抗値出力手段は液面に追従するフロート内に
組込まれた接点２２が抵抗体２３及びアース導体
２５上を摺動し、その結果所定の抵抗値を出力す
る。又、抵抗体２３のバラツキにより所定の抵抗
値が得られない場合、補正抵抗３３ａ，３３ｂの
いづれか一方を並列接続となして、所定の抵抗値
が得られるようにしている。又、非設置室２１ｂ
側の燃料が正常に設置室２１ａ側に送られなくな
つた場合、システム上燃料計の指針がＥを指す前
にガス欠状態になる可能性があるのでその対策と
して、サブ検出器本体側の出力が抵抗体３２のみ
であつても並列回路の合成抵抗として燃料計の指
針がＥ以下を指示することのできる抵抗値となる
ような抵抗体３４に接続されている導体２４を備
えていて、フロート接点２２がＢ位置のときその
抵抗値を出力する。サブ検出器本体２９側の抵抗
値の出力手段は、液面に追従するフロート内に組
込まれたマグネツト２７と、そのマグネツト２７
の磁力によりオン−オフする複数のリードスイツ
チ２８ａ，２８ｂ，２８ｃとで構成されていて、
そのリードスイツチと並列に、抵抗体３１ａ，３
１ｂ，３１ｃが接続されていることから非設置室
２１ｂ側に燃料がある場合リードスイツチはオン
の状態となつているので抵抗体３２の抵抗値のみ
出力する。ある程度液面が下がりリードスイツチ
２８ａがオフとなると抵抗値は抵抗体３２と抵抗
体３１ａの合成抵抗となり抵抗値が増える。次に
リードスイツチ２８ｂもオフとなると、出力抵抗
値は抵抗値３２＋３１ａ＋３１ｂの合成抵抗とな
る。さらにリードスイツチ２８ｃがオフとなると
抵抗体３２＋３１ａ＋３１ｃの抵抗値出力とな
る。 The circuit configuration of the liquid level detector according to this embodiment has been described above. Next, its operation will be described. The output resistance values of are connected in parallel, and the combined resistance causes the pointer on the fuel gauge to swing. Main detector body 26
In the resistance value output means, a contact 22 incorporated in a float that follows the liquid level slides on a resistor 23 and a ground conductor 25, and as a result outputs a predetermined resistance value. Further, when a predetermined resistance value cannot be obtained due to variations in the resistor 23, either one of the correction resistors 33a and 33b is connected in parallel to obtain a predetermined resistance value. Also, non-installation room 21b
If the fuel on the side is no longer sent normally to the installation chamber 21a side, there is a possibility that the system will run out of gas before the pointer on the fuel gauge points to E, so as a countermeasure, Even if the output is only the resistor 32, the conductor 24 is connected to the resistor 34 such that the combined resistance of the parallel circuit has a resistance value that allows the pointer of the fuel gauge to indicate E or less, When the float contact 22 is in the B position, its resistance value is output. The resistance value output means on the side of the sub-detector main body 29 includes a magnet 27 built into a float that follows the liquid level, and the magnet 27.
It is composed of a plurality of reed switches 28a, 28b, and 28c that are turned on and off by the magnetic force of
In parallel with the reed switch, resistors 31a, 3
1b and 31c are connected, so when there is fuel in the non-installation chamber 21b, the reed switch is in an on state, and only the resistance value of the resistor 32 is output. When the liquid level drops to a certain extent and the reed switch 28a is turned off, the resistance value becomes the combined resistance of the resistor 32 and the resistor 31a, and the resistance value increases. Next, when the reed switch 28b is also turned off, the output resistance value becomes a composite resistance of resistance values 32+31a+31b. Furthermore, when the reed switch 28c is turned off, the resistance values of the resistors 32+31a+31c are output.
このように本考案の液面検出器にあつては、燃
料タンク内に設備されるメイン検出器本体２６と
サブ検出器本体２９に接続されるそれぞれの抵抗
体３１ａ，３１ｂ，３１ｃ，３２，３３ａ，３３
ｂ，３４を、セラミツク基板３０上に、厚膜集積
回路により形成し、この回路板を、メイン検出器
本体２６とサブ検出器本体２９とに後加工により
接続することで組立がなされるものである。従つ
て上記の回路板は、１部材として扱われることか
ら、従来の多数の抵抗体を接続するものに比して
その取扱い部品点数が大幅に削減でき、これによ
つて組立作業性の簡素化、取付スペースの削減等
が可能となる効果がある。
In this way, in the liquid level detector of the present invention, the respective resistors 31a, 31b, 31c, 32, 33a are connected to the main detector main body 26 and the sub-detector main body 29 installed in the fuel tank. ,33
b, 34 are formed using a thick film integrated circuit on a ceramic substrate 30, and this circuit board is assembled by connecting it to the main detector main body 26 and the sub-detector main body 29 through post-processing. be. Therefore, since the above-mentioned circuit board is treated as one component, the number of parts to be handled can be significantly reduced compared to the conventional circuit board that connects a large number of resistors, which simplifies assembly work. This has the effect of making it possible to reduce the installation space.
第１図は本考案よりなる液面検出器の実施例を
示した回路説明図、第２図及び第３図は従来例の
断面図及び回路説明図である。
２０……タンク、２０ａ……突部、２１ａ……
設置室、２１ｂ……非設置室、２２……フロート
接点、２３……抵抗体、２４……導体、２５……
アース用導体、２６……メイン検出器本体、２７
……マグネツト、２８ａ，２８ｂ，２８ｃ……リ
ードスイツチ、２９……サブ検出器本体、３０…
…セラミツク基板、３１ａ，３１ｂ，３１ｃ……
抵抗体、３２……抵抗体、３３ｃ，３３ｂ……抵
抗体，３４……抵抗体。
FIG. 1 is an explanatory circuit diagram showing an embodiment of a liquid level detector according to the present invention, and FIGS. 2 and 3 are a sectional view and an explanatory circuit diagram of a conventional example. 20...Tank, 20a...Protrusion, 21a...
Installation chamber, 21b... Non-installation room, 22... Float contact, 23... Resistor, 24... Conductor, 25...
Grounding conductor, 26... Main detector body, 27
...Magnet, 28a, 28b, 28c...Reed switch, 29...Sub detector main body, 30...
... Ceramic substrate, 31a, 31b, 31c...
Resistor, 32...Resistor, 33c, 33b...Resistor, 34...Resistor.
Claims (1)
て、吐出ポンプが設置された設置室２１ａと、吐
出ポンプが設置されていない非設置室２１ｂとを
有する燃料タンク２０の前記設置室２１ａには、
液面レベルを検出する摺動可変抵抗式の主検出器
本体２６を、また前記非設置室２１ｂにはスイツ
チ切換による可変抵抗式の副検出器本体２９を、
夫々設け、前記設置室側の液面が零位置になつた
とき、前記主検出器本体の抵抗値を増加して液面
の零位置に相当する値を出力せしめる第１の抵抗
体３４と、前記副検出器本体２９に接続されて検
出回路を形成する第２の抵抗体３１ａ，３１ｂ，
３１ｃ，３２と、前記主検出器本体の抵抗値を補
正する第３の抵抗体３３ａ，３３ｂとを単一のセ
ラミツク基板３０上に集積して形成した集積回路
を介して前記主検出器本体２６を副検出器本体２
９とを並列に電気接続したことを特徴とする液面
検出器。 The installation chamber 21a of the fuel tank 20 is divided by a protrusion 20a provided at the bottom and has an installation chamber 21a in which a discharge pump is installed and a non-installation chamber 21b in which a discharge pump is not installed.
A sliding variable resistance type main detector body 26 for detecting the liquid level, and a variable resistance type sub detector body 29 that can be switched by a switch are installed in the non-installation chamber 21b.
a first resistor 34 which increases the resistance value of the main detector body to output a value corresponding to the zero position of the liquid level when the liquid level on the side of the installation chamber reaches the zero position; second resistors 31a, 31b, which are connected to the sub-detector main body 29 and form a detection circuit;
31c, 32, and third resistors 33a, 33b for correcting the resistance value of the main detector body are integrated on a single ceramic substrate 30. The sub-detector body 2
A liquid level detector characterized in that 9 is electrically connected in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7376588U JPH0536178Y2 (en) | 1988-06-02 | 1988-06-02 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7376588U JPH0536178Y2 (en) | 1988-06-02 | 1988-06-02 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01180719U JPH01180719U (en) | 1989-12-26 |
| JPH0536178Y2 true JPH0536178Y2 (en) | 1993-09-13 |
Family
ID=31298896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7376588U Expired - Lifetime JPH0536178Y2 (en) | 1988-06-02 | 1988-06-02 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0536178Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101146353B1 (en) * | 2010-04-20 | 2012-05-21 | 정현오 | Device for measuring water level capable of emergency switching |
-
1988
- 1988-06-02 JP JP7376588U patent/JPH0536178Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01180719U (en) | 1989-12-26 |
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