JPH02167433A - Fuel gauge with rest warning device - Google Patents
Fuel gauge with rest warning deviceInfo
- Publication number
- JPH02167433A JPH02167433A JP15683989A JP15683989A JPH02167433A JP H02167433 A JPH02167433 A JP H02167433A JP 15683989 A JP15683989 A JP 15683989A JP 15683989 A JP15683989 A JP 15683989A JP H02167433 A JPH02167433 A JP H02167433A
- Authority
- JP
- Japan
- Prior art keywords
- warning
- fuel
- resistor
- remaining amount
- slider
- 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
- 239000000446 fuel Substances 0.000 title claims abstract description 81
- 230000007423 decrease Effects 0.000 claims abstract description 12
- 239000003990 capacitor Substances 0.000 claims description 18
- 239000002828 fuel tank Substances 0.000 claims description 11
- 239000000758 substrate Substances 0.000 claims description 9
- 238000006073 displacement reaction Methods 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 239000003566 sealing material Substances 0.000 claims description 2
- 230000004913 activation Effects 0.000 claims 1
- 230000001934 delay Effects 0.000 claims 1
- 230000003247 decreasing effect Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 9
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 2
- 101150047375 DID2 gene Proteins 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 231100000989 no adverse effect Toxicity 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Level Indicators Using A Float (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の目的〕
（産業上の利用分野）
この発明は、燃料の残量を指示すると共に、燃料の残量
が所定量以下になったときに警告を発する残量警告装置
付燃料計に関するものである。[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) This invention provides a system for indicating the remaining amount of fuel and issuing a warning when the remaining amount of fuel becomes less than a predetermined amount. This relates to a fuel gauge with a warning device.
（従来の技術）
燃料残量を指示すると共に、燃料残量が所定量以下にな
ったとき点灯する警告ランプを装備した残量警告装置付
燃料計として、例えば第１２図り
に示すものが知られている。この燃料計によれば、文字
板１００に燃料残量を表示する目盛１１．０と、この目
盛１１０上を移動する指針１．２０と、燃料残量が所定
量以下になったとき点灯する警告ランプ１３０とを装備
して構成されている。なお、第１２図中１６０はスイッ
チ、エフ０は電源である。(Prior Art) As a fuel gauge with a remaining fuel level warning device that indicates the remaining fuel level and is equipped with a warning lamp that lights up when the remaining fuel level falls below a predetermined level, for example, the one shown in Figure 12 is known. ing. According to this fuel gauge, there is a scale 11.0 that displays the remaining fuel level on the dial 100, a pointer 1.20 that moves on this scale 110, and a warning that lights up when the remaining fuel level falls below a predetermined amount. It is configured to be equipped with a lamp 130. In FIG. 12, 160 is a switch, and F0 is a power supply.
ここで、指針１２０を動かすコイルＬ１〜Ｌ３（第１３
図参照）と警告ランプ１３０は、燃料タンク１．４０に
装備したセンダ１５０に接続されている。このセンダ↑
５０は、例えば第１４図に示すように、燃料タンク１４
０に固定された円板状の取付基板１５１と、この取付基
板１５１のフレム１５２に取付けられたステー１５３と
、このステー１，５３の先端部（図面では下端部）に取
付けられた燃料残量検知用のサーミスタ１５４と、先端
（図面では下端）にフロート１５５を設けて基端部（図
面では上端）が前記フレーム１５２に回転可能に取付け
られたフロートアーム１５６と、このフロートアーム１
５６の基端部側に固定された摺動子１５８と、前記フレ
ーム１５２に嵌合固定され、前記フロートアーム１５６
の摺動に伴って摺動子１５８が摺接する抵抗板１５９と
から構成されている。Here, the coils L1 to L3 (13th
(see figure) and warning lamp 130 are connected to a sender 150 installed in the fuel tank 1.40. This sender↑
50 is the fuel tank 14, as shown in FIG. 14, for example.
A disc-shaped mounting board 151 fixed at 0, a stay 153 attached to the frame 152 of this mounting board 151, and a fuel remaining amount attached to the tips (lower ends in the drawing) of these stays 1 and 53. a thermistor 154 for detection, a float arm 156 having a float 155 at its tip (lower end in the drawing) and whose base end (upper end in the drawing) is rotatably attached to the frame 152;
A slider 158 fixed to the base end side of the float arm 156 and a slider 158 fixed to the frame 152 and fixed to the float arm 156
A slider 158 and a resistance plate 159 come into sliding contact with each other as the slider 158 slides.
なお、第１５図は上記抵抗板］５９を示しており、ラセ
ミツク等の基板１５９ａと、この基板１５９ａ上に印刷
形成される複数の抵抗体１５９ｂと、同じく基板１５９
ａ上に印刷形成され、一端が抵抗体１５９ｂに接続され
て他端に摺動子］５８が摺接する複数の導電性接触体１
５９Ｃとから構成されている。また、抵抗体１５９ａの
一端は、指針１２０を動かすコイルＬ１〜Ｌ３に接続さ
れ、またサーミスタ１５４が警告ランプ１３０に接続さ
れている（第１３図参照）。Note that FIG. 15 shows the above-mentioned resistor plate] 59, which includes a substrate 159a made of racemic or the like, a plurality of resistors 159b printed and formed on this substrate 159a, and the same substrate 159.
A plurality of conductive contact bodies 1 printed on the surface of a, one end of which is connected to the resistor 159b, and the other end of which is in sliding contact with a slider]58.
59C. Further, one end of the resistor 159a is connected to the coils L1 to L3 that move the pointer 120, and the thermistor 154 is connected to the warning lamp 130 (see FIG. 13).
上記残量警告装置付燃料計によれば、燃料残量が減って
波面が下がると、これに伴いフロート１５５が下降し、
フロートアーム１５６が摺動する。According to the fuel gauge with a remaining fuel level warning device, when the remaining fuel level decreases and the wave surface lowers, the float 155 descends accordingly.
Float arm 156 slides.
このフロートアーム１５６の摺動により摺動子１５８が
抵抗体１５９ｂ （導電性接触体１．５９ ｃ ）上を
摺動して抵抗が変化し、そしてこの抵抗の変化によりコ
イルＬ１〜Ｌ３に流れる電流が変化する。この電流の変
化により、コイルＬ、−ｔ、、、により形成される合成
磁界が変化して、指針１２０が目盛１１０上を移動し、
燃料残量を指示する。Due to this sliding of the float arm 156, the slider 158 slides on the resistor 159b (conductive contact body 1.59c), and the resistance changes, and due to this change in resistance, the current flows through the coils L1 to L3. changes. Due to this change in current, the composite magnetic field formed by the coils L, -t, . . . changes, and the pointer 120 moves on the scale 110.
Indicates the remaining amount of fuel.
また、燃料残量が所定量以下まで減ると、すなわちサー
ミスタ１５４の設置位置まで液面が下がると、サーミス
タ１５４が燃料中に漬かった状態から空気中に露出する
。これによりサーミスタ１５４が温度変化を受けてサー
ミスタ１５４の抵抗値が変わり、警告ランプ１３０が点
灯する。Further, when the remaining amount of fuel decreases to a predetermined amount or less, that is, when the liquid level falls to the installation position of the thermistor 154, the thermistor 154 is exposed to the air from a state immersed in the fuel. As a result, the thermistor 154 receives a temperature change, the resistance value of the thermistor 154 changes, and the warning lamp 130 lights up.
（発明が解決しようとする課題）
上記残量警告装置付燃料計では、サーミスタ１５４が燃
料中から空気中に露出した際のサーミスタ１５４の抵抗
変化を利用して、警告ランプ１３０に流れる電流を制御
しているため、電圧及び温度の使用範囲が狭い問題があ
り、また負荷特性の影響が非常に大きく、負荷抵抗や警
告ランプ１３０等が限定されてしまう問題もあった。(Problem to be Solved by the Invention) In the fuel gauge with a remaining fuel level warning device, the current flowing through the warning lamp 130 is controlled by utilizing the resistance change of the thermistor 154 when the thermistor 154 is exposed from the fuel to the air. Therefore, there is a problem that the usable range of voltage and temperature is narrow, and the influence of load characteristics is very large, and there is also a problem that the load resistance, warning lamp 130, etc. are limited.
また、燃料の残量指示に関する部分（フロートアーム１
５６、摺動子１５８、抵抗板１５９等）と燃料の残量警
告に関する部分（ステー１５３、サーミスタ１５４等）
とは全く別の動作をするため、残量指示で既に警告を発
する程度まで燃料が減少しているのに、警告ランプ１３
０が点灯しなかったり、あるいは残量指示で警告を発す
るまで燃料が減少していないのに、警告ランプ１３０が
点灯したりする等、残量指示と残量警告とがうまく連動
しない問題があった。Also, the part related to the remaining fuel level indication (float arm 1
56, slider 158, resistance plate 159, etc.) and parts related to remaining fuel warning (stay 153, thermistor 154, etc.)
Since the operation is completely different from that of the warning lamp 13, even though the fuel level has already decreased to the point where a warning is issued by the remaining amount indicator, the warning lamp 13
There are problems in which the remaining amount indicator and the remaining amount warning do not work well together, such as the warning lamp 130 not lighting up even though the fuel level has not decreased until the remaining amount indicator issues a warning. Ta.
さらに、燃料残量が僅かになってから警告を発するよう
にサーミスタ１５４を燃料タンク］４０の底面付近に設
置しているため、ステー１５３が長くなり、センダ１５
０を燃料タンク１４０に取付ける際等にステー１５３と
フロートアーム１５６とが絡み合わないように注意しな
ければならない問題もあった。Furthermore, since the thermistor 154 is installed near the bottom of the fuel tank 40 so as to issue a warning when the remaining amount of fuel is low, the stay 153 becomes longer and the sender 15
There was also the problem that care had to be taken to prevent the stay 153 and float arm 156 from becoming entangled when attaching the 0 to the fuel tank 140.
この発明は上記従来技術の問題点を解消するもので、そ
の目的とするところは、電圧及び温度の使用範囲が広く
とれ、また負荷抵抗や警告ランプ等が特定されず、さら
に残量指示と残量警告とが正確に連動し、さらにまたセ
ンダを燃料タンクに取付ける際に特別の注意を払わなく
ても済む残量ら
警告装置付燃料計を提供することである。This invention solves the above-mentioned problems of the prior art.The purpose of this invention is to widen the range of voltage and temperature that can be used, to avoid specifying load resistors and warning lamps, and to provide an indication of the remaining amount. To provide a fuel gauge with a remaining amount warning device which accurately interlocks with the amount warning and does not require special care when attaching a sender to a fuel tank.
（課題を解決するための手段）
上記目的を達成するためこの発明の請求項（１）の残量
警告装置付燃料計では、抵抗板と、燃料タンク中の液面
変位にしたがって抵抗板上の抵抗体を摺動する摺動子か
らなる抵抗器を装備して、この抵抗器の抵抗変化により
燃料の残量指示を行うように構威し、かつ燃料残量が所
定量以下に減少したとき警告を発する警告手段を装備し
た残量警告装置付燃料計において、前記抵抗板上の抵抗
体に残量警告点を設けると共に、この残量警告点と前記
警告手段との間に両者を連結する回路を設けて、摺動子
が抵抗体の残量警告点に達したとき、警告手段を動作さ
せるように構成したことを特徴としている。(Means for Solving the Problems) In order to achieve the above object, the fuel meter with a remaining amount warning device according to claim (1) of the present invention has a resistance plate and a fuel gauge on the resistance plate according to the liquid level displacement in the fuel tank. Equipped with a resistor consisting of a slider that slides on a resistor, the system is configured to indicate the remaining amount of fuel by changing the resistance of this resistor, and when the remaining amount of fuel decreases below a predetermined amount. In a fuel gauge with a remaining amount warning device equipped with a warning means for issuing a warning, a remaining amount warning point is provided on the resistor on the resistor plate, and both are connected between the remaining amount warning point and the warning means. The present invention is characterized in that a circuit is provided to operate the warning means when the slider reaches the residual amount warning point of the resistor.
また、請求項（２）の残量警告装置付燃料計では、請求
項（１）の回路に遅延回路を設けたことを特徴としてい
る。Further, the fuel gauge with a remaining amount warning device according to claim (2) is characterized in that a delay circuit is provided in the circuit according to claim (1).
さらに、請求項（３）の残量警告装置付燃料計ては、請
求項（２）の遅延回路を、抵抗体の回路中に組み込んで
抵抗板の基板に実装し、燃料に対し耐久性のある封止祠
で封止したことを特徴としている。Furthermore, in the fuel meter with a remaining amount warning device according to claim (3), the delay circuit according to claim (2) is incorporated into the circuit of the resistor and mounted on the substrate of the resistor plate, and the fuel meter has durability against fuel. It is characterized by being sealed in a certain sealing shrine.
さらにまた、請求項（４）の残量警告装置付燃料計では
、請求項（２）の遅延回路にこれのコンデンサの充電放
電を電圧で制御する制御手段を設けたことを特徴として
いる。Furthermore, the fuel gauge with a remaining amount warning device according to claim (4) is characterized in that the delay circuit according to claim (2) is provided with a control means for controlling charging and discharging of the capacitor in the delay circuit according to claim (2).
この発、明で「残量警告位置」とは、燃料残量が警告を
発するまで減少したとき、その時点での摺動子の抵抗体
上の摺動位置をいう。In this invention, the term "residual amount warning position" refers to the sliding position of the slider on the resistor at the time when the remaining fuel amount has decreased to the point where a warning is issued.
また、「警告手段」には、警告ランプやブザ等が使用さ
れる。Moreover, a warning lamp, a buzzer, etc. are used as the "warning means".
（作用）
請求項（１）の残量警告装置付燃料計では、燃料の液面
変位に伴って摺動子が抵抗体上を摺動し、抵抗器の抵抗
が燃料残量に対応して変化する。(Function) In the fuel gauge with a remaining amount warning device according to claim (1), the slider slides on the resistor as the fuel level changes, and the resistance of the resistor corresponds to the remaining fuel amount. Change.
この抵抗器の抵抗変化により、例えば指針を駆動するコ
イルに流れる電流が変化し、この電流の変化により、コ
イルの合成磁界が変わって、指針が燃料残量を指示する
。燃料残量が減少して摺動子が抵抗体上の残量警告点に
摺動すると、回路により警告手段に電流が流れて、警告
手段が動作する。This change in resistance of the resistor changes the current flowing through the coil that drives the pointer, for example, and this change in current changes the combined magnetic field of the coil, so that the pointer indicates the remaining amount of fuel. When the remaining amount of fuel decreases and the slider slides to the remaining amount warning point on the resistor, current flows through the warning means by the circuit, and the warning means is activated.
また、請求項（２）、（３）の残量警告装置付燃料計で
は、摺動子が残量警告位置に移動しても直ちに警告手段
が動作せず、遅延回路により一定の時間遅れて動作する
。Further, in the fuel gauge with a remaining amount warning device according to claims (2) and (3), even if the slider moves to the remaining amount warning position, the warning means does not operate immediately, but after a certain period of time delay due to the delay circuit. Operate.
さらにまた、請求項（４）の残量警告装置付燃料計では
、遅延回路の充電放電は残量警告点に流れる電流の有無
により生じる電圧変化に対応して動作する制御手段によ
り制御されるので、抵抗板の絶縁低下により若干の電流
が流れても不所望に警告手段が動作することはない。Furthermore, in the fuel gauge with a remaining amount warning device according to claim (4), the charging and discharging of the delay circuit is controlled by the control means that operates in response to voltage changes caused by the presence or absence of current flowing to the remaining amount warning point. Even if a small amount of current flows due to a decrease in the insulation of the resistor plate, the warning means will not operate undesirably.
（実施例） 以下この発明の一実施例を図面を参照して説明する。(Example) An embodiment of the present invention will be described below with reference to the drawings.
第１図はこの発明に係る残量警告装置付燃料計の電気回
路図である。図中符号１０はセンダ（図示せず）に装備
される抵抗器、Ｌ１〜Ｌ３は指針（図示せず）を駆動す
るコイル、２０は警告ランプ、３０はスイッチ、４０は
電源である。FIG. 1 is an electrical circuit diagram of a fuel gauge with a remaining fuel warning device according to the present invention. In the figure, reference numeral 10 is a resistor installed in a sender (not shown), L1 to L3 are coils that drive a pointer (not shown), 20 is a warning lamp, 30 is a switch, and 40 is a power source.
抵抗器１０は、図示しないセンダのフロートアームの基
端部側に固定された摺動子１１と、同じく図示しないセ
ンダの取付基板のフレームに固定された抵抗板１２とか
らなり、フロートアームの摺動に伴って摺動子１１が抵
抗板１２の抵抗体１２ｂ（導電性接触体１２ｃ）上を摺
動して、抵抗が変化するように構成されている。The resistor 10 consists of a slider 11 fixed to the base end side of a float arm of a sender (not shown) and a resistance plate 12 fixed to the frame of a mounting board of the sender (also not shown). The slider 11 is configured to slide on the resistor 12b (conductive contact body 12c) of the resistor plate 12 as the resistance changes, thereby changing the resistance.
ここで、抵抗板１２は、第２図に示すように、ラセミツ
ク等の基板１２ａ上に、複数の抵抗体１２ｂと、一端が
抵抗体１２ｂに接続されて他端に摺動子１１が摺動する
複数の導電性接触体］−２ｃとを印刷形成して構成され
ている。そして、抵抗体１２ ｂの一端（第１図に示す
Ａ端）がコイルＬ１とＬ２との間に接続され、また摺動
子１１が摺動する抵抗体１２ｂの他端部分が導電性接触
体１２ｃと摺動子１１を介してアースＧに接続されてい
る。Here, as shown in FIG. 2, the resistor plate 12 has a plurality of resistors 12b on a substrate 12a made of racemic or the like, one end of which is connected to the resistor 12b, and a slider 11 that slides on the other end. It is constructed by printing and forming a plurality of conductive contact bodies]-2c. One end of the resistor 12b (end A shown in FIG. 1) is connected between the coils L1 and L2, and the other end of the resistor 12b on which the slider 11 slides is connected to a conductive contact. 12c and the ground G via the slider 11.
燃料タンク（図示せず）に燃料が満たされている場合に
は、摺動子１１は第１図のＦ側に位置し、燃料が減少す
るに従って同図のＥ側に摺動し、この摺動子１１のＦ側
からＥ側への摺動に伴って、抵抗体１２ｂの抵抗値が変
化する。When the fuel tank (not shown) is filled with fuel, the slider 11 is located on the F side in FIG. 1, and as the fuel decreases, it slides to the E side in the figure. As the mover 11 slides from the F side to the E side, the resistance value of the resistor 12b changes.
第３図は燃料の液面変位（残量の変化）と抵抗板１２（
抵抗体１２ｂ）のＡ、８間の電圧との関係を示すグラフ
で、同グラフから明らかなように、液面が高い状態（摺
動子１１がＦ側に位置した状態）では電圧が低く、この
状態から液面が下降するにしたがって摺動子１１がＥ側
に摺動して、電圧が上昇する。Figure 3 shows the fuel level displacement (change in remaining amount) and the resistance plate 12 (
This is a graph showing the relationship between the voltage between A and 8 of the resistor 12b).As is clear from the graph, when the liquid level is high (when the slider 11 is located on the F side), the voltage is low; As the liquid level falls from this state, the slider 11 slides toward the E side, and the voltage increases.
このように燃料液面の変位で摺動子１１が抵抗体１２ｂ
のＦ側からＥ側に摺動して、抵抗体１２ｂの抵抗値が変
わることにより（Ａ、８間の電圧が変化することにより
）、コイルＬ１〜Ｌ３に流れる電流値が変わってコイル
Ｌ１〜Ｌ３に発生する磁界が変化し、この磁界の変化に
より指針が目盛上（図示せず）を移動して燃料の残量を
指示する。In this way, due to the displacement of the fuel liquid level, the slider 11 moves to the resistor 12b.
When the resistor 12b slides from the F side to the E side, the resistance value of the resistor 12b changes (by the voltage between A and 8 changes), the current value flowing through the coils L1 to L3 changes, and the current value flowing through the coils L1 to L3 changes. The magnetic field generated at L3 changes, and the change in magnetic field causes the pointer to move on a scale (not shown) to indicate the remaining amount of fuel.
この発明では、上述の燃料残量を指示する部分を利用し
て、燃料残量が少なくなったことを警告する手段を動作
させるように槽底した点に特徴を有しており、従来のよ
うにサーミスタを使用していない。This invention is characterized in that the bottom of the tank is configured to operate a means for warning that the remaining fuel amount is low by using the above-mentioned portion indicating the remaining fuel amount, unlike the conventional method. does not use a thermistor.
すなわち、給油が必要な程度に減少した燃料残量を指示
する際の摺動子］−１の抵抗体１２ｂ（導電性接触体１
２ｃ）上の摺動位置を、残量警告点１３とし、そしてこ
の残量警告点１３と警告ランプ２０との間に両者を接続
する回路５０を設けている。また、残量警告点１３とＦ
側の抵抗体１２ｂとの間にダイオード１４を介在し、そ
してダイオード１４のアノード側を残量警告点１３より
もＦ側の抵抗体１２ｂに接続し、またカソード側を残量
警告点１３に接続して、摺動子１１が残量警告点１３よ
りもＦ側に位置しているとき、回路５０を介して警告ラ
ンプ２０に電流が流れるのを防止している。In other words, the resistor 12b of the slider]-1 (the conductive contact member 1
2c) The upper sliding position is the remaining amount warning point 13, and a circuit 50 is provided between this remaining amount warning point 13 and the warning lamp 20 to connect both. Also, the remaining amount warning point 13 and F
A diode 14 is interposed between the resistor 12b on the side, and the anode side of the diode 14 is connected to the resistor 12b on the F side of the remaining amount warning point 13, and the cathode side is connected to the remaining amount warning point 13. Thus, when the slider 11 is located on the F side of the remaining amount warning point 13, current is prevented from flowing to the warning lamp 20 via the circuit 50.
なお、ダイオード１４は、第２図に示すように、基板１
２ａ上に実装されているが、回路的に残量警告点１３と
Ｆ側の抵抗体１２ｂとの間に配置されるようになってい
れば、警告ランプ２０側に設置１
けてもよい。また、警告ランプ２０の代わりにブザー等
を使用してもよい。Note that the diode 14 is connected to the substrate 1 as shown in FIG.
Although it is mounted on the warning lamp 2a, it may be installed on the warning lamp 20 side if the circuit is arranged between the remaining amount warning point 13 and the F side resistor 12b. Further, a buzzer or the like may be used instead of the warning lamp 20.
このようにすると、サーミスタを使用しなくても、燃料
残量が給油を必要とするまで減少したとき、警告ランプ
２０を点灯させることが出来る。In this way, even without using a thermistor, the warning lamp 20 can be turned on when the remaining amount of fuel decreases to the point where refueling is required.
すなわち、燃料残量が減少して、摺動子１１が残量警告
点１３に対応する導電性接触体１２ｃ位置に達すると、
摺動子１１、導電性接触体１２ｃ、回路５０、抵抗Ｒ８
を介して警告ランプ２０に電流が流れ、警告ランプ２０
が点灯する。燃料残量が更に減少して摺動子１１がＥ側
に移動しても、警告ランプ２０には摺動子１１、導電性
接触体１２Ｃ１抵抗体１２ｂ、回路５０、抵抗Ｒθを介
して電流が流れるため、点灯し続ける。That is, when the remaining amount of fuel decreases and the slider 11 reaches the position of the conductive contact body 12c corresponding to the remaining amount warning point 13,
Slider 11, conductive contact body 12c, circuit 50, resistor R8
A current flows to the warning lamp 20 through the warning lamp 20.
lights up. Even if the remaining amount of fuel decreases further and the slider 11 moves to the E side, the warning lamp 20 receives current through the slider 11, the conductive contact body 12C1, the resistor 12b, the circuit 50, and the resistor Rθ. Because it flows, it stays lit.
なお、摺動子１１が残量警告点１３からＥ側に移動して
いる間もコイルＬ１〜Ｌ３には電流が流れ、残量指示を
行う。Note that even while the slider 11 is moving from the remaining amount warning point 13 to the E side, current flows through the coils L1 to L3, and the remaining amount is indicated.
第４図は上記実施例の変形例を示すもので、摺動子１１
をスイッチ３０を介して電源４０の＋側に接続し、また
ダイオード１４のアノード側を残量警告点１３に接続し
、またカソード側を残量警告点１３よりもＦ側の抵抗体
１２ｂに接続している。すなわち、第１図に示す回路と
プラス・マイナスが反対になっている。他の点について
は、第１図に示す回路と何ら変わらない。FIG. 4 shows a modification of the above embodiment, in which the slider 11
is connected to the + side of the power supply 40 via the switch 30, and the anode side of the diode 14 is connected to the remaining amount warning point 13, and the cathode side is connected to the resistor 12b on the F side of the remaining amount warning point 13. are doing. That is, the circuit shown in FIG. 1 is opposite in terms of plus and minus. In other respects, this circuit is no different from the circuit shown in FIG.
この場合にも、第１図に示す回路と同様に、摺動子１１
が残量警告点１３に達すると、警告ランプ２０に電流が
流れて点灯する。In this case as well, the slider 11 is similar to the circuit shown in FIG.
When the remaining amount reaches the warning point 13, current flows through the warning lamp 20 and lights it up.
上述の第１図および第４図に示す実施例の回路では、警
告ランプ２０を点灯する電流が摺動子１１、導電性接触
体１２ｃ、残量警告点１３、回路５０、抵抗Ｒ６を通る
が、この電流値が大きいと、残量警告点１３以降におい
て残量指示に悪影響を与える問題がある。また、振動等
による燃料タンク中の燃料の液面変位が原因となってフ
ロートアーム（図示せず）が振動し、摺動子１１が一時
的に残量警告点１３よりもＦ側に移動すると、警告ラン
プ２０が点灯・消灯を繰り返してちらつく問題がある。In the circuit of the embodiment shown in FIGS. 1 and 4 described above, the current for lighting the warning lamp 20 passes through the slider 11, the conductive contact 12c, the remaining amount warning point 13, the circuit 50, and the resistor R6. If this current value is large, there is a problem in that it adversely affects the remaining amount indication after the remaining amount warning point 13. Additionally, if the float arm (not shown) vibrates due to displacement of the fuel level in the fuel tank due to vibrations, etc., and the slider 11 temporarily moves to the F side beyond the remaining amount warning point 13, , there is a problem that the warning lamp 20 repeatedly turns on and off and flickers.
第５図は、このような問題を解消するため、回路５０に
遅延回路６０を介在させた他の実施例を示している。第
６図は、第５図の遅延回路６０を具体的に示している。FIG. 5 shows another embodiment in which a delay circuit 60 is interposed in the circuit 50 in order to solve this problem. FIG. 6 specifically shows the delay circuit 60 of FIG.
遅延回路６０は、例えば、トランジスタＱＩＱ２．Ｑ３
と、ダイオードＤ、、Ｄ２ と、抵抗Ｒ〜Ｒ５と、コ
ンデンサＣとから構成されている。The delay circuit 60 includes, for example, transistors QIQ2. Q3
, diodes D, , D2, resistors R to R5, and a capacitor C.
ここで、トランジスタＱ１のベースは抵抗Ｒ，を介して
残量警告位置１３に接続されている。また、トランジス
タＱ２．Ｑ３はダーリントン接続され、それらのコレク
タが抵抗Ｒ日を介して警告ランプ２０に接続されている
。また、ダイオードＤＩＤ２、抵抗Ｒ，−Ｒ５、コンデ
ンサＣはトランジスタＱ１のコレクタとトランジスタＱ
２のベースとの間に介在されている。また、抵抗Ｒ１の
抵抗値は、抵抗板１２ｂやコイルＬ、に接続されている
抵抗Ｒ７よりも大きく設定されていて、摺動子１１が残
量警告点１３からＥ側に移動してもコイルＬ１〜Ｌ３に
流れる電流に影響を与えないようにしている。Here, the base of the transistor Q1 is connected to the remaining amount warning position 13 via a resistor R. Also, transistor Q2. Q3 are Darlington connected and their collectors are connected to the warning lamp 20 via a resistor R. In addition, the diode DID2, the resistors R, -R5, and the capacitor C are connected to the collector of the transistor Q1 and the transistor Q
It is interposed between the base of 2 and the base of 2. Further, the resistance value of the resistor R1 is set larger than the resistor R7 connected to the resistor plate 12b and the coil L, so that even if the slider 11 moves from the remaining amount warning point 13 to the E side, the coil This is done so as not to affect the current flowing through L1 to L3.
この実施例では、摺動子１１が残量警告点１３に移動す
ると、トランジスタＱ１が導通状態になり、抵抗Ｒ３と
コンデンサＣによる時定数Ｒ３Ｃで定められた時間遅れ
の後、トランジスタＱ２゜Ｑ３が導通状態になって警告
ランプ２０が点灯する。In this embodiment, when the slider 11 moves to the remaining amount warning point 13, the transistor Q1 becomes conductive, and after a time delay determined by the time constant R3C formed by the resistor R3 and the capacitor C, the transistors Q2 and Q3 turn on. A conductive state is established and the warning lamp 20 lights up.
振動等による燃料タンク中の燃料の液面変位が原因とな
ってフロートアーム（図示せず）が揺動し、摺動子１１
が一時的に残量警告点１３よりもＦ側に移動すると、ト
ランジスタＱ１が一時的に非導通状態になり、このとき
にはコンデンサＣがダイオードＤ２抵抗Ｒ２を介して瞬
時に放電するため、警告ランプ２０がちらつくような事
態は生じない。また、摺動子１１が残量警告位置１３か
らＥ側に向かって移動している間も残量指示に何ら影響
を与えるようなこともない。また、トランジスタＱ２
、Ｑａをダーリントン接続して電流増幅しているため、
負荷としての警告手段の大小や形態等が限定されず、警
告ランプ２０以外に種々の警告手段を用いることが出来
る。The float arm (not shown) swings due to the displacement of the fuel level in the fuel tank due to vibrations, etc., and the slider 11
When Q1 temporarily moves to the F side beyond the remaining capacity warning point 13, the transistor Q1 becomes temporarily non-conductive, and at this time, the capacitor C is instantly discharged via the diode D2 and the resistor R2, so the warning lamp 20 No flickering situations occur. Further, even while the slider 11 is moving from the remaining amount warning position 13 toward the E side, the remaining amount indication is not affected in any way. Also, transistor Q2
, Qa are connected in Darlington to amplify the current, so
The size and form of the warning means as a load are not limited, and various warning means other than the warning lamp 20 can be used.
第７図は遅延回路６０を抵抗体１２ｂの回路中に組み込
んだ更に他の実施例を示している。第８図は第７図の遅
延回路部分を具体的に示している。FIG. 7 shows yet another embodiment in which a delay circuit 60 is incorporated into the circuit of the resistor 12b. FIG. 8 specifically shows the delay circuit portion of FIG. 7.
なお、遅延回路６０の構成については第５図にしめすも
のと同じであり、また遅延回路６０中の抵抗Ｒ１−Ｒ３
等の抵抗値は抵抗体１２ｂやコイルＬ、に接続されてい
る抵抗Ｒ７よりも大きく設定されている。The configuration of the delay circuit 60 is the same as that shown in FIG.
The resistance values of the resistor 12b and the coil L are set larger than the resistor R7 connected to the resistor 12b and the coil L.
この実施例のように遅延回路６０を抵抗体１２ｂの回路
中に組み込むと、抵抗体１２ｂのＡ、 ８間の電圧が残
量警告点１３付近で大きいことから（第３図参照）、遅
延回路６０専用の電源を設けなくても済むようになる。When the delay circuit 60 is incorporated into the circuit of the resistor 12b as in this embodiment, since the voltage between A and 8 of the resistor 12b is large near the remaining amount warning point 13 (see Fig. 3), the delay circuit There is no need to provide a dedicated power supply for the 60.
なお、遅延回路６０専用の電源を設けた場合には、回路
の設計に際し、この実施例よりも自由度がある。Note that if a power supply dedicated to the delay circuit 60 is provided, there is more freedom in designing the circuit than in this embodiment.
第９図は第７図の実施例における抵抗板１２の外観を示
す斜視図で、基板１２ａ上に遅延回路６０、ダイオード
１４が実装されていて、燃料に対して耐久性のある封止
材７０により封止されている。このため、遅延回路６０
を実装する専用の基板を必要とせず、また抵抗板１２の
基板１２ａの有効活用を図ることが出来る。FIG. 9 is a perspective view showing the external appearance of the resistor plate 12 in the embodiment of FIG. 7, in which a delay circuit 60 and a diode 14 are mounted on the substrate 12a, and a sealing material 70 that is durable against fuel is used. It is sealed by. Therefore, the delay circuit 60
There is no need for a dedicated board for mounting the resistor plate 12, and the board 12a of the resistor plate 12 can be used effectively.
第１０図はさらに別の実施例を示し、この実施例は第５
図に示す他の実施例と同様な構成であるが、遅延回路だ
けが相違しているので、他の部分には同一符号を付して
詳細な説明は省略する。この実施例は、第５図の実施例
と同様にトランジスタＱ＋ 、Ｑ２およびＱ３を備えて
いるが、残量警告点１３とトランジスタＱ１との間に、
ツェナーダイオードＺＤＩが介挿されている点が大きな
相違点である。いま、摺動子１１が残量警告点１３より
Ｆ側にあると、ツェナーダイオードＺＤＩのカソード側
の電位が高くなっているために、トランジスタＱ１はＯ
Ｎ（動作）状態で、コンデンサには充電されず、従って
トランジスタＱ２．Ｑ３はＯＦＦ状態なので警告ランプ
２０には電流が流れない。摺動子１１が残量警告点１３
に到達すると、ツェナーダイオードＺＤＩのカソード側
の電位が低くなるため、トランジスタＱ１は０ＦＦＬコ
ンデンサＣに充電される。モしてＲＩ４・Ｃの時定数で
決まる時間だけ遅延してトランジスタＱ２Ｑ３がＯＮＬ
、警告ランプ２０に電流が流れ点灯する。上述したよう
にこの実施例においては、ツェナーダイオードＺＤＩと
トランジスタＱ１とでコンデンサＣの制御手段７０を構
成していて、これは残量警告点を通る電流の有無により
変化する電圧に対応して動作することにより、コンデン
サＣの充電、放電を制御する。FIG. 10 shows yet another embodiment, which is the fifth embodiment.
Although the configuration is similar to that of the other embodiments shown in the figures, only the delay circuit is different, so other parts are given the same reference numerals and detailed explanations will be omitted. This embodiment includes transistors Q+, Q2, and Q3 as in the embodiment of FIG.
The major difference is that a Zener diode ZDI is inserted. Now, when the slider 11 is on the F side from the remaining amount warning point 13, the potential on the cathode side of the Zener diode ZDI is high, so the transistor Q1 is turned off.
In the N (operating) state, the capacitor is not charged and therefore transistor Q2. Since Q3 is in the OFF state, no current flows through the warning lamp 20. Slider 11 is at the remaining amount warning point 13
When the voltage reaches , the potential on the cathode side of the Zener diode ZDI becomes low, so that the transistor Q1 charges the 0FFL capacitor C. After a delay of the time determined by the time constant of RI4・C, transistors Q2Q3 turn ON.
, current flows through the warning lamp 20 and lights it up. As described above, in this embodiment, the Zener diode ZDI and the transistor Q1 constitute the control means 70 for the capacitor C, which operates in response to the voltage that changes depending on the presence or absence of current passing through the remaining amount warning point. By doing so, the charging and discharging of the capacitor C is controlled.
第１１図は、第１０図に示す前記別の実施例の変形例で
あって、この別の実施例とは制御手段７０がコンパレー
タＩＣで構成されている点が相違している。第１１図に
示すように、抵抗体Ｒ２１゜Ｒ２２の中間点と、抵抗Ｒ
２３＋ Ｒ２４の中間点が、それぞれコンパレータＩＣ
の入力となっている。摺動子１１が残量警告点１３より
Ｆ側では、抵抗体Ｒ２１＋ Ｒ２２の中間点の方が抵抗
体Ｒ２３，Ｒ２４の中間点より電位が高くなっているた
めコンパレータＩＣはＯＮし、コンデンサＣは充電され
ず、トランジスタＱ２．Ｑ３はＯＦＦ状態である。摺動
子１１が残量警告点１３に到達すると、反対に抵抗体Ｒ
２１＋ Ｒ２２の中間点の方が電位が低くなるためコン
パレータＩＣはＯＦＦし、コンデンサＣは充電され、こ
のコンデンサＣと抵抗体Ｒ２８とで決まる時定数だけ遅
延してトランジスタＱ２ Ｑ３はＯＮの状態となり警告
ランプ２０は点灯する。FIG. 11 shows a modification of the other embodiment shown in FIG. 10, and is different from this other embodiment in that the control means 70 is composed of a comparator IC. As shown in FIG.
The midpoints of 23+R24 are each a comparator IC.
This is the input. When the slider 11 is on the F side from the remaining amount warning point 13, the potential at the midpoint between resistors R21+R22 is higher than the midpoint between resistors R23 and R24, so the comparator IC is turned on and the capacitor C is turned on. Not charged, transistor Q2. Q3 is in the OFF state. When the slider 11 reaches the remaining amount warning point 13, the resistor R
Since the potential is lower at the midpoint of 21+R22, the comparator IC is turned off, capacitor C is charged, and after a delay of the time constant determined by capacitor C and resistor R28, transistors Q2 and Q3 are turned on and a warning is issued. Lamp 20 lights up.
この実施例のように電圧の変化によりコンデンサＣの充
電、放電を制御するものは、抵抗体１２ｂが、絶縁性の
低い例えばアルコールなどに浸漬して、わずかな電流か
流れている場合でも、不所望にコンデンサＣが充電され
て、警告ランプ２０が点灯するようなことはない。In the case where the charging and discharging of the capacitor C is controlled by changing the voltage as in this embodiment, even if the resistor 12b is immersed in a low insulating substance such as alcohol and a small current is flowing, no damage occurs. There is no possibility that the capacitor C will be charged as desired and the warning lamp 20 will light up.
以上説明したように請求項（］）の発明によれば、燃料
残量を指示する部分（抵抗器）を利用して、燃料残量が
少なくなったことを警告する手段を動作させるように構
成して、従来のようにサーミスタを使用していないため
、電圧及び温度の使用範囲を広くとれ、また負荷抵抗や
警告ランプ等が特定されず、さらに残量指示と残量警告
とが正確に連動し、さらにまたサーミスタを指示するス
１ つ
チーが省略できるため、センダを燃料タンクに取付ける
際に特別の注意を払わなくても済む。As explained above, according to the invention of claim (]), the part (resistor) that indicates the remaining fuel amount is used to operate the means for warning that the remaining fuel amount is low. Since it does not use a thermistor like in the past, it can be used over a wide range of voltage and temperature, and load resistance and warning lamps are not specified, and the remaining amount indication and remaining amount warning are accurately linked. Furthermore, since the one step that indicates the thermistor can be omitted, there is no need to take special care when attaching the sender to the fuel tank.
また、請求項（２）の発明によれば、遅延回路を設けて
いるので、警告ランプのちらつき問題がなく、また残量
指示を行う部分の回路にも悪影響を及ぼさない。Further, according to the invention of claim (2), since the delay circuit is provided, there is no problem of flickering of the warning lamp, and there is no adverse effect on the circuit for indicating the remaining amount.
また、請求項（３）の発明によれば、遅延回路を抵抗体
に組み込んで抵抗板に実装しているため、遅延回路専用
の電源や基板を必要とせず、抵抗板の基板の有効活用を
図ることが出来る。Further, according to the invention of claim (3), since the delay circuit is incorporated into the resistor and mounted on the resistor plate, there is no need for a dedicated power supply or board for the delay circuit, and the board of the resistor plate can be used effectively. It is possible to plan.
また、請求項（４）の考案によれば、コンデンサの充電
放電を電圧の変化により制御するようにしたので、抵抗
体の絶縁低下により抵抗板に僅かな電流が流れても、こ
れによりコンデンサが充電されて警告ランプが点灯する
ようなことはない。Furthermore, according to the invention of claim (4), since the charging and discharging of the capacitor is controlled by changing the voltage, even if a small amount of current flows through the resistor plate due to a decrease in the insulation of the resistor, this will cause the capacitor to There is no warning light that comes on when the battery is charged.
第１図乃至第４図はこの発明の一実施例を示すもので、
第１図は電気回路図、第２図は抵抗板の斜視図、第３図
は燃料の液面変位（残量の変化）と抵抗板１２（抵抗体
１２ｂ）のＡ、８間の電圧との関係を示すグラフ、第４
図は第１図に示す回路の変形例であり、また第５図およ
び第６図は他の実施例を示す回路図であり、又第７図乃
至第９図は更に他の実施例を示すもので、第７図は回路
図、第８図は第７図の遅延回路部分を具体的に示した回
路図、第９図は第７図の抵抗板の外観を示した斜視図で
あり、また第１０図および第１１図はさらに別の実施例
を示すもので、第１０図は回路図、第１１図は変形例の
回路図であり、また第１２図乃至第１５図は従来技術を
示すもので、第１２図は装置全体を示す略解説明図、第
１３図は回路図、第１４図はセンダの外観を示す斜視図
、第１５図は抵抗板の外観を示す斜視図である。
Ｃ・・・コンデンサ
１０・・・抵抗器
１１・・・摺動子
１２・・・抵抗板
１２ａ・・・基板
１、２ ｂ・・・抵抗体
１２ｃ・・・導電性接触体
・・・残量警告点
・・・ダイオード
・・・警告手段（警告ランプ）
・・・回路
・・・遅延回路
・・・制御手段Figures 1 to 4 show an embodiment of the present invention.
Figure 1 is an electric circuit diagram, Figure 2 is a perspective view of the resistor plate, and Figure 3 is the relationship between the fuel level displacement (change in remaining amount) and the voltage between A and 8 of the resistor plate 12 (resistor 12b). Graph showing the relationship between
The figure shows a modification of the circuit shown in FIG. 1, FIGS. 5 and 6 are circuit diagrams showing other embodiments, and FIGS. 7 to 9 show still other embodiments. 7 is a circuit diagram, FIG. 8 is a circuit diagram specifically showing the delay circuit portion of FIG. 7, and FIG. 9 is a perspective view showing the appearance of the resistor plate of FIG. 7. Further, FIGS. 10 and 11 show still another embodiment, FIG. 10 is a circuit diagram, FIG. 11 is a circuit diagram of a modified example, and FIGS. 12 to 15 show a prior art. 12 is a schematic diagram showing the entire device, FIG. 13 is a circuit diagram, FIG. 14 is a perspective view showing the external appearance of the sender, and FIG. 15 is a perspective view showing the external appearance of the resistor plate. C... Capacitor 10... Resistor 11... Slider 12... Resistance plate 12a... Substrate 1, 2 b... Resistor 12c... Conductive contact body... Remaining Quantity warning point...Diode...Warning means (warning lamp)...Circuit...Delay circuit...Control means
Claims (4)
抵抗板上の抵抗体を摺動する摺動子からなる抵抗器を装
備して、この抵抗器の抵抗変化により燃料の残量指示を
行うように構成し、かつ燃料残量が所定量以下に減少し
たとき警告を発する警告手段を装備した残量警告装置付
燃料計において、 前記抵抗板上の抵抗体に残量警告点を設けると共に、こ
の残量警告点と前記警告手段との間に両者を連結する回
路を設けて、摺動子が抵抗体の残量警告点に達したとき
、警告手段を動作させるように構成したことを特徴とす
る残量警告装置付燃料計。(1) Equipped with a resistor consisting of a resistor plate and a slider that slides the resistor on the resistor plate according to the displacement of the liquid level in the fuel tank, and the remaining amount of fuel is indicated by the resistance change of this resistor. In a fuel gauge with a remaining fuel level warning device configured to perform the following and equipped with a warning means for issuing a warning when the remaining fuel level decreases below a predetermined amount, a remaining fuel level warning point is provided on the resistor on the resistor plate. In addition, a circuit is provided between the remaining amount warning point and the warning means, and the warning means is configured to operate when the slider reaches the remaining amount warning point of the resistor. A fuel gauge with a remaining fuel warning device.
請求項（１）記載の残量警告装置付燃料計。(2) A fuel gauge with a remaining amount warning device according to claim (1), characterized in that said circuit is provided with a delay circuit.
抗板の基板に実装し、燃料に対し耐久性のある封止材で
封止したことを特徴とする請求項（２）記載の残量警告
装置付燃料計。(3) The delay circuit according to claim (2), wherein the delay circuit is incorporated into a circuit of a resistor, mounted on a substrate of a resistor plate, and sealed with a sealing material that is durable against fuel. Fuel gauge with remaining fuel warning device.
のコンデンサは残量警告点を流れる電流の有無により生
じる電圧変化に対応して動作する制御手段により充電放
電が制御されるものであることを特徴とする請求項（２
）記載の残量警告装置付燃料計。(4) The delay circuit delays the activation of the warning means, and the charging and discharging of the capacitor is controlled by the control means that operates in response to voltage changes caused by the presence or absence of current flowing through the remaining capacity warning point. Claim (2)
) Fuel gauge with remaining fuel warning device.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US07/401,801 US4967181A (en) | 1988-09-12 | 1989-09-01 | Fuel level gauge provided with an apparatus for issuing a warning on the amount of remaining fuel |
| DE3930102A DE3930102A1 (en) | 1988-09-12 | 1989-09-09 | FUEL TANK LEVEL INDICATOR DEVICE WITH A REMAINING QUANTITY WARNING DEVICE |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63-226347 | 1988-09-12 | ||
| JP22634788 | 1988-09-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02167433A true JPH02167433A (en) | 1990-06-27 |
| JP2533937B2 JP2533937B2 (en) | 1996-09-11 |
Family
ID=16843742
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1156839A Expired - Lifetime JP2533937B2 (en) | 1988-09-12 | 1989-06-21 | Fuel gauge with remaining amount warning device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2533937B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04136525U (en) * | 1991-06-13 | 1992-12-18 | 矢崎総業株式会社 | Liquid level detection device |
| KR100440884B1 (en) * | 2001-08-13 | 2004-07-21 | 주식회사 모빌일렉트론 | Warning display circuit for fuel gauge of automobile |
| KR100483139B1 (en) * | 2002-07-11 | 2005-04-14 | 주식회사 모빌일렉트론 | Delay integrated circuit for fuel gauge warning display of automobile |
| KR100768339B1 (en) * | 2006-07-05 | 2007-10-17 | 성신공업 주식회사 | Fuel shortage alarm device of automobile |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5517485A (en) * | 1978-07-25 | 1980-02-06 | Nippon Denso Co Ltd | Fuel meter for vehicle |
| JPS6355122U (en) * | 1986-09-29 | 1988-04-13 |
-
1989
- 1989-06-21 JP JP1156839A patent/JP2533937B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5517485A (en) * | 1978-07-25 | 1980-02-06 | Nippon Denso Co Ltd | Fuel meter for vehicle |
| JPS6355122U (en) * | 1986-09-29 | 1988-04-13 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04136525U (en) * | 1991-06-13 | 1992-12-18 | 矢崎総業株式会社 | Liquid level detection device |
| KR100440884B1 (en) * | 2001-08-13 | 2004-07-21 | 주식회사 모빌일렉트론 | Warning display circuit for fuel gauge of automobile |
| KR100483139B1 (en) * | 2002-07-11 | 2005-04-14 | 주식회사 모빌일렉트론 | Delay integrated circuit for fuel gauge warning display of automobile |
| KR100768339B1 (en) * | 2006-07-05 | 2007-10-17 | 성신공업 주식회사 | Fuel shortage alarm device of automobile |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2533937B2 (en) | 1996-09-11 |
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