KR20020052360A - Oil sensor for vehicle - Google Patents

Oil sensor for vehicle Download PDF

Info

Publication number
KR20020052360A
KR20020052360A KR1020000081600A KR20000081600A KR20020052360A KR 20020052360 A KR20020052360 A KR 20020052360A KR 1020000081600 A KR1020000081600 A KR 1020000081600A KR 20000081600 A KR20000081600 A KR 20000081600A KR 20020052360 A KR20020052360 A KR 20020052360A
Authority
KR
South Korea
Prior art keywords
resistors
resistor
voltage
series
oil
Prior art date
Application number
KR1020000081600A
Other languages
Korean (ko)
Other versions
KR100387831B1 (en
Inventor
하경표
Original Assignee
이계안
현대자동차주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 이계안, 현대자동차주식회사 filed Critical 이계안
Priority to KR10-2000-0081600A priority Critical patent/KR100387831B1/en
Publication of KR20020052360A publication Critical patent/KR20020052360A/en
Application granted granted Critical
Publication of KR100387831B1 publication Critical patent/KR100387831B1/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/24—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/80—Arrangements for signal processing

Abstract

PURPOSE: An oil sensor is provided to simplify the configuration of oil sensor and accurately measure an oil level by measuring the oil level through the phenomenon where the resistance value of resistor changes according to temperature. CONSTITUTION: An oil sensor comprises an upper resistor unit constituted by four resistors(21,22,23,24) having the same resistance value(R1); a central resistor unit constituted by four resistors(31,33) having the same resistance value(R2); a lower resistor unit constituted by four resistors(42,44) having the same resistance value(R3), wherein a first group of resistors(33,23,44,24) are sequentially connected in serial, a second group of resistors(33,23,44,24) are sequentially connected in serial, and the first and second group are connected in parallel; a first differential amplifier(50) for differential amplifying a voltage(V2+V2+V3) at resistors(31,22,42) and a voltage(V1+V3+V1) at resistors(23,44,24), and outputting a voltage(V2-V1); a second differential amplifier(60) for differential amplifying a voltage(V3) at the resistor(42) and a voltage(V1) at the resistor(24), and outputting a voltage(V3-V1); and a micro computer(70) for calculating an oil level by multiplying the length of resistor to the value obtained by dividing the voltage(V2-V1) by the voltage(V3-V1), and displaying the calculated oil level to an oil level display device(80).

Description

차량용 오일센서{Oil sensor for vehicle}Oil sensor for vehicle

본 발명은 차량용 오일센서에 관한 것으로, 좀더 상세하게는 저항체의 저항값이 온도에 따라 바뀌는 현상을 이용하여, 오일팬내의 기체부분에 노출된 저항체와, 오일부분에 노출된 오일부분에 노출된 저항체, 기체와 오일에 걸쳐 있는 저항체의 저항차를 이용하여 오일레벨을 측정하는 오일레벨 센서에 관한 것이다.The present invention relates to an oil sensor for a vehicle, and more particularly, a resistor exposed to a gas part in an oil pan and a resistor exposed to an oil part exposed to an oil part by using a phenomenon in which the resistance value of the resistor changes with temperature. The present invention relates to an oil level sensor that measures an oil level by using a resistance difference between a resistor across a gas and oil.

일반적으로, 엔진에서 오일(윤활유)의 부족은 엔진에 돌이킬 수 없는 치명적인 손상을 준다. 따라서, 오일펌프의 출구측 압력을 측정하여 오일부족 경고등을 점등하는 오일압력스위치가 있기는 하나, 이와 같은 경고등 점등 설정압력은 낮게 설정되어 있어, 오일부족 경고등이 점등된 때는 이미 엔진에 손상이 간 상태이다.In general, the lack of oil (lubricating oil) in the engine causes irreparable fatal damage to the engine. Therefore, although there is an oil pressure switch that measures the outlet pressure of the oil pump to light an oil shortage warning light, such a warning light lighting setting pressure is set low, and when the oil shortage warning light is lit, the engine is already damaged. It is a state.

상기와 같이 오일부족 경고등의 점등 설정압력을 낮게 설정된 이유는, 엔진의 전 운전영역에서 오일펌프의 회전수가 달라지므로 운전영역에 따라 오일펌프의 출구측 압력이 영향을 받고, 또한 온도의 영향을 많이 받는데, 이 경우들에서 오일량이 충분한때, 즉 정상적인 경우에 나타날 수 있는 오일펌프의 출구측 압력의 최소값 보다 낮게 설정하므로, 오일부족 경고등의 점등 설정압력이 낮을 수 밖에 없는 것이다.The reason why the setting pressure of the low oil warning lamp is set low is that since the rotation speed of the oil pump varies in the entire operating region of the engine, the pressure at the outlet side of the oil pump is affected by the operating region, and the temperature influences a lot. In these cases, when the oil level is sufficient, i.e., it is set lower than the minimum value of the outlet pressure of the oil pump which may appear in normal cases, the set pressure of the low oil warning light is low.

따라서, 상기한 바와 같은 오일압력 스위치의 단점을 극복하기 위한 많은 기술들이 제안되어 있다.Therefore, many techniques for overcoming the disadvantages of the oil pressure switch as described above have been proposed.

미국특허 US04203408호(Lubricating oil detector for an internal combusion engine)에서는 오일팬 밖으로 튜브를 빼내어 이 튜브내의 오일높이를 측정하여 오일량을 표시하고 있다. 그러나, 이와 같은 방식은 오일팬에 튜브를 추가로 설치해야 할 뿐만 아니라 전자식 또는 육안으로 오일레벨을 확인하여야 하는 불편함이 있었다.In US Patent US04203408 (Lubricating oil detector for an internal combusion engine), the tube is taken out of the oil pan and the oil level in the tube is measured to indicate the oil level. However, this method has the inconvenience of having to check the oil level electronically or visually as well as additionally installing the tube in the oil pan.

그리고, 미국특허 US04622935호(Low level lubricating oil detector)에서는 엔진 블로우 바이 가스에 의한 크랭크케이스 내부 기체의 압력파를 이용한다. 즉, 압력파감지장치를 한쪽 끝이 막힌 튜브내에 설치하고 이 튜브의 개방단부를 오일내에 잠기게 설치한다. 이때, 상기 튜브의 개방단부가 오일에 의해 크랭크케이스 내부기체와 차단되면 압력파감지장치에 압력파가 감지되지 못하게 되고, 오일레벨이 낮어져 상기 개방단부가 크랭크케이스 내부 기체에 노출되면 압력파감지장치에 압력파가 감지되므로, 이를 이용하여 오일레벨이 낮아지는 것을 경고한다. 그러나, 이와 같은 방식은 압력파를 측정하기 위해 고가의 센서를 사용하여야 할 뿐만 아니라 기존의 오일압력 스위치에 비해 장점을 가지는 못하는 문제점이 있었다.In addition, US Patent US04622935 (Low level lubricating oil detector) uses the pressure wave of the gas inside the crankcase by the engine blow-by gas. That is, the pressure wave detector is installed in a tube with one end blocked, and the open end of the tube is immersed in oil. At this time, if the open end of the tube is blocked from the gas inside the crankcase by oil, the pressure wave can not be detected by the pressure wave detection device, the oil level is lowered, the pressure wave detection when the open end is exposed to the gas inside the crankcase Since pressure waves are detected by the device, it is used to warn of a low oil level. However, this method not only has to use an expensive sensor to measure the pressure wave, but also has a problem that it does not have advantages over the conventional oil pressure switch.

또한, 미국특허 US03605086호(Oil level indicator)에서는 플로우트(float)를 이용하여 오일량을 측정하고 있다. 그러나, 이와 같은 방식은 플로우트가 오일팬내에 요동이 심한 부분에 장착되므로 신뢰성이 낮은 문제점이 있었다.In addition, US Patent No. 03605086 (Oil level indicator) is measuring the amount of oil using a float (float). However, this method has a problem in that the reliability is low because the float is mounted to the shaking part in the oil pan.

또, 미국특허 US04306525호(Engine oil indicator)에서는 광센서의 발광소자를 오일내부에 설치하고 수광소자를 기체내에 설치하여, 발광소자에서 나온 광량이 수광소자에 얼마나 도달하는지를 측정하여 오일 레벨을 구하고 있다. 그러나, 이와 같은 방식은 반도체 소자인 광센서가 고온의 오일 내부에 장시간 노출됨에 따라 센서가 파손되어 제기능을 수행하지 못하게 되므로 별도의 냉각장치가 필요한 문제점이 있었다.In addition, US Patent US04306525 (Engine oil indicator) is to determine the oil level by measuring how much light emitted from the light emitting device reaches the light receiving device by installing a light emitting device of the light sensor in the oil and a light receiving device in the gas. . However, this method has a problem that a separate cooling device is required because the optical sensor, which is a semiconductor element, is exposed to a high temperature in the oil for a long time so that the sensor is not able to perform its function.

이에, 본 발명은 상기한 바와 같은 종래의 제 문제점을 해소하기 위해 안출된 것으로, 저항체의 저항값이 온도에 따라 바뀌는 현상을 이용하여, 오일팬내의 기체부분에 노출된 저항체와, 오일부분에 노출된 오일부분에 노출된 저항체, 기체와 오일에 걸쳐 있는 저항체의 저항차를 이용하여 오일레벨을 측정함으로써, 그 구성이 매우 간단할 뿐만 아니라 오일레벨을 정확하게 측정할 수 있는 차량용 오일센서를 제공하는데 그 목적이 있다.Accordingly, the present invention has been made to solve the above-mentioned problems of the prior art, by using the phenomenon that the resistance value of the resistor changes with temperature, the resistor exposed to the gas part in the oil pan and the oil part. By measuring the oil level by using the resistance difference between the resistor exposed to the oil part and the resistance between the gas and oil, the configuration is very simple and provides a vehicle oil sensor that can accurately measure the oil level. There is a purpose.

상기한 바와 같은 목적을 달성하기 위한 본 발명에 따른 차량용 오일센서는, 비전도체에 비전도체의 길이방향을 따라 동일 저항값(R1)을 가지는 4개의 저항체(21∼24)로 이루어진 상부저항체부와, 동일 저항값(R2)을 가지는 4개의 저항체(31∼34)으로 이루어진 중앙부저항체부, 동일 저항값(R3)를 가지는 4개의 저항체(41∼44)로 이루어진 하부저항체부가 차례로 배열되어 고정되며, 4개의 저항체(21, 31, 22, 42)가 차례로 직렬 접속됨과 더불어 4개의 저항체(33, 23, 44, 24)가 차례로 직렬 접속되고, 상기 직렬 접속된 저항체(21, 31, 22, 42)와 직렬 접속된 저항체(33, 23, 44, 24)가 병렬로 접속되어 있는 한편, 저항체(31, 22, 42)에 걸리는 전압(V2+V1+V3)과, 저항체(23, 44, 24)에 걸리는 전압(V1+V3+V1)을 차동증폭하여 전압(V2-V1)을 출력하는 제1차동증폭기와, 저항체(42)에 걸리는 전압(V3)와 저항체(24)에 걸리는 전압(V1)을 차동증폭하여 전압(V3-V1)을 출력하는 제2차동증폭기, 상기 전압(V2-V1)을 전압(V3-V1)으로 나눈값에 저항체의 길이(L)를 곱하여 오일레벨을 산출하고, 산출된 오일레벨을 오일레벨표시장치에 표시하는 마이컴을포함하여 구성된 것을 특징으로 한다.An oil sensor for a vehicle according to the present invention for achieving the above object includes an upper resistor portion consisting of four resistors 21 to 24 having the same resistance value R1 in the non-conductor along the longitudinal direction of the non-conductor. The center resistor part consisting of four resistors 31 to 34 having the same resistance value R2, and the lower resistor part consisting of four resistors 41 to 44 having the same resistance value R3 are arranged and fixed in this order. Four resistors 21, 31, 22, 42 are connected in series, and four resistors 33, 23, 44, 24 are connected in series, and the series connected resistors 21, 31, 22, 42 are connected. The resistors 33, 23, 44, 24 connected in series with each other are connected in parallel, while the voltages V2 + V1 + V3 applied to the resistors 31, 22, 42 and resistors 23, 44, 24 are connected. A first differential amplifier for differentially amplifying the voltage V1 + V3 + V1 and outputting the voltage V2-V1, and the voltage V3 applied to the resistor 42; A second differential amplifier which differentially amplifies the voltage V1 applied to the resistor 24 and outputs the voltage V3-V1. The length of the resistor is divided by a value obtained by dividing the voltage V2-V1 by the voltage V3-V1. Multiply by L) to calculate the oil level, characterized in that it comprises a microcomputer to display the calculated oil level on the oil level display device.

또한, 상기 저항체(31, 22)의 사이점과 상기 저항체(23, 44)의 사이점이 접속되어 있는 것을 특징으로 한다.In addition, the point of contact between the resistors 31 and 22 and the point of resistance of the resistors 23 and 44 are connected.

그리고, 본 발명의 다른 실시예에 따른 차량용 오일센서는, 비전도체에 비전도체의 길이방향을 따라 동일 저항값(R1)을 가지는 3개의 저항체(21∼23)로 이루어진 상부저항체부와, 동일 저항값(R2)을 가지는 3개의 저항체(31∼33)으로 이루어진 중앙부저항체부, 동일 저항값(R3)를 가지는 3개의 저항체(41∼43)로 이루어진 하부저항체부가 차례로 배열되어 고정되며, 3개의 저항체(21, 31, 41)가 차례로 직렬 접속되고, 3개의 저항체(32, 22, 42)가 차례로 직렬 접속되며, 3개의 저항체(33, 43, 23)가 차례로 직렬 접속되고, 상기 직렬 접속된 저항체(21, 31, 41)와 직렬 접속된 저항체(32, 22, 42) 및 직렬 접속된 3개의 저항체(33, 43, 23)가 병렬로 접속되어 있는 한편, 저항체(31, 41)에 걸리는 전압(V2+V3)과, 저항체(22, 42)에 걸리는 전압(V1+V3)을 차동증폭하여 전압(V2-V1)을 출력하는 제1차동증폭기, 저항체(42)에 걸리는 전압(V3)와 저항체(23)에 걸리는 전압(V1)을 차동증폭하여 전압(V3-V1)을 출력하는 제2차동증폭기, 상기 전압(V2-V1)을 전압(V3-V1)으로 나눈값에 저항체의 길이(L)를 곱하여 오일레벨을 산출하고, 산출된 오일레벨을 오일레벨표시장치에 표시하는 마이컴을 포함하여 구성된 것을 특징으로 한다.In addition, the oil sensor for a vehicle according to another embodiment of the present invention includes an upper resistor portion consisting of three resistors 21 to 23 having the same resistance value R1 in the non-conductor along the longitudinal direction of the non-conductor. The central resistor unit consisting of three resistors 31 to 33 having the value R2, and the lower resistor unit consisting of three resistors 41 to 43 having the same resistance value R3 are arranged and fixed in sequence, and the three resistors (21, 31, 41) are connected in series, three resistors 32, 22, 42 are connected in series, three resistors 33, 43, 23 are connected in series, and the series connected resistors The resistors 32, 22, 42 connected in series with (21, 31, 41) and the three resistors 33, 43, 23 connected in series are connected in parallel, while the voltage across the resistors 31, 41 is applied. The first difference outputs the voltages V2-V1 by differentially amplifying V2 + V3 and the voltages V1 + V3 applied to the resistors 22 and 42. A second differential amplifier which differentially amplifies the voltage V3 applied to the amplifier and the resistor 42 and the voltage V1 applied to the resistor 23 and outputs the voltage V3-V1, and the voltage V2-V1 And a microcomputer for calculating the oil level by multiplying the value divided by (V3-V1) by the length (L) of the resistor, and displaying the calculated oil level on the oil level display device.

또한, 본 발명의 또 다른 실시예에 따른 차량용 오일센서는, 비전도체에 비전도체의 길이방향을 따라 동일 저항값(R1)을 가지는 3개의 저항체(21∼23)로 이루어진 상부저항체부와, 동일 저항값(R2)을 가지는 3개의 저항체(31∼33)으로 이루어진 중앙부저항체부, 동일 저항값(R3)를 가지는 3개의 저항체(41∼43)로 이루어진 하부저항체부가 차례로 배열되어 고정되며, 3개의 저항체(21, 41, 31)가 차례로 직렬 접속되고, 3개의 저항체(42, 22, 32)가 차례로 직렬 접속되며, 3개의 저항체(43, 33, 23)가 차례로 직렬 접속되고, 상기 직렬 접속된 저항체(21, 41, 31)와 직렬 접속된 저항체(42, 22, 32) 및 직렬 접속된 저항체(43, 33, 23)가 병렬로 접속되어 있는 한편, 저항체(41, 31)에 걸리는 전압(V3+V2)과, 저항체(22, 32)에 걸리는 전압(V3+V2)을 차동증폭하여 전압(V3-V1)을 출력하는 제1차동증폭기, 저항체(32)에 걸리는 전압(V2)와 저항체(23)에 걸리는 전압(V1)을 차동증폭하여 전압(V2-V1)을 출력하는 제2차동증폭기, 상기 전압(V2-V1)을 전압(V3-V1)으로 나눈값에 저항체의 길이(L)를 곱하여 오일레벨을 산출하고, 산출된 오일레벨을 오일레벨표시장치에 표시하는 마이컴을 포함하여 구성된 것을 특징으로 한다.In addition, the oil sensor for a vehicle according to another embodiment of the present invention is the same as the upper resistor portion consisting of three resistors (21 to 23) having the same resistance value (R1) in the non-conductor along the longitudinal direction of the non-conductor. The central resistor part consisting of three resistors 31 to 33 having a resistance value R2, and the lower resistor part consisting of three resistors 41 to 43 having the same resistance value R3 are arranged and fixed in sequence. The resistors 21, 41, 31 are connected in series, the three resistors 42, 22, 32 are connected in series, the three resistors 43, 33, 23 are connected in series, and the series connected The resistors 42, 22 and 32 connected in series with the resistors 21, 41 and 31 and the resistors 43, 33 and 23 connected in series are connected in parallel while the voltage applied to the resistors 41 and 31 ( First differential amplification for differentially amplifying V3 + V2 and the voltages V3 + V2 applied to the resistors 22 and 32 and outputting the voltage V3-V1. The second differential amplifier outputs the voltage V2-V1 by differentially amplifying the voltage V2 applied to the resistor 32 and the voltage V1 applied to the resistor 23, and the voltage V2-V1. And a microcomputer for calculating the oil level by multiplying the value divided by (V3-V1) by the length (L) of the resistor, and displaying the calculated oil level on the oil level display device.

도 1은 본 발명에 따른 차량용 오일센서의 개념을 설명하기 위한 도면,1 is a view for explaining the concept of an oil sensor for a vehicle according to the present invention;

도 2는 본 발명의 1실시예 및 2실시예에 따른 차량용 오일센서의 저항체 배열상태도,2 is an arrangement state of the resistors of the oil sensor for a vehicle according to the first and second embodiments of the present invention;

도 3은 본 발명의 1실시예에 따른 차량용 오일센서의 회로도,3 is a circuit diagram of an oil sensor for a vehicle according to an embodiment of the present invention;

도 4는 본 발명의 2실시예에 따른 차량용 오일센서의 회로도,4 is a circuit diagram of an oil sensor for a vehicle according to an embodiment of the present disclosure;

도 5는 본 발명의 3실시예 및 4실시예에 따른 차량용 오일센서의 저항체 배열상태도,5 is an arrangement state of the resistor of the vehicle oil sensor according to the third embodiment and the fourth embodiment of the present invention,

도 6은 본 발명의 3실시예에 따른 차량용 오일센서의 회로도,6 is a circuit diagram of a vehicle oil sensor according to an embodiment of the present invention;

도 7은 본 발명의 4실시예에 따른 차량용 오일센서의 회로도,7 is a circuit diagram of an oil sensor for a vehicle according to an embodiment of the present invention;

<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>

10 : 비전도체 20 : 상부저항체부10: non-conductor 20: upper resistor portion

30 : 중앙부저항체부 40 : 하부저항체부30: center resistor part 40: lower resistor part

50 : 제1차동증폭기 60 : 제2차동증폭부50: first differential amplifier 60: second differential amplifier

70 : 마이컴 80 : 오일레벨 표시장치70: microcomputer 80: oil level display device

이하, 첨부된 도면을 참조하여 본 발명의 바람직한 실시예를 설명한다.Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

도 1은 본 발명에 따른 차량용 오일센서의 개념을 설명하기 위한 도면으로서, 상기 도 1에서, L은 가늘고 긴 금속선(예를 들어, 철선)으로 이루어진 저항체(R1, R2, R3)의 길이이고, h는 L길이의 저항체중에서 오일에 잠긴 부분으로 오일레벨의 지표가 된다. 또, T1과 T2는 기체와 액체에 잠긴 저항체의 온도를 나타내며, V1, V2, V3는 각 저항체(R1, R2, R3)의 단자간 전압을 나타낸다.1 is a view for explaining the concept of a vehicle oil sensor according to the present invention, in Figure 1, L is the length of the resistors (R1, R2, R3) consisting of a long thin metal wire (for example, iron wire), h is the oil submerged portion of the resistor of length L and is an indicator of oil level. In addition, T1 and T2 represent the temperature of the resistor submerged in gas and liquid, and V1, V2, and V3 represent the voltage between terminals of the resistors R1, R2, and R3.

이때, 상기 저항체의 저항값은 저항체의 온도에 따라 결정되므로, 하기의 수학식 1 내지 4에서 알수 있드시, 전류(I)를 저항체(R1, R2, R3)에 흘리고 각 저항체(R1, R2, R3)의 전압(V1, V2, V3)를 측정함으로써 오일레벨을 구할 수 있다.At this time, since the resistance value of the resistor is determined according to the temperature of the resistor, as shown in Equations 1 to 4 below, the current I flows through the resistors R1, R2, and R3, and each resistor R1, R2, and R3. The oil level can be obtained by measuring the voltages V1, V2, and V3.

상기 수학식 1내지 4에서 ρ는 저항체의 저항계수이고, A는 저항체의 단면적이며, αω는 저항체의 온도 저항계수이다.In Equations 1 to 4, p is a resistance coefficient of the resistor, A is a cross-sectional area of the resistor, and α ω is a temperature resistance coefficient of the resistor.

상기한 수학식 4에서 알 수 있드시, 각 저항체(R1, R2, R3)의 전압(V1, V2, V3)를 측정하여 오일레벨을 구할 수 있다.As can be seen from Equation 4, the oil level can be obtained by measuring the voltages V1, V2, and V3 of the resistors R1, R2, and R3.

도 2는 본 발명의 1실시예 및 2실시예에 따른 차량용 오일센서의 저항체 배열상태도로서, 비전도성판/비전도성봉(10)에 비전도성판/비전도성봉(10)의 길이방향을 따라 동일 저항값(R1)을 가지는 4개의 저항체(21∼24)로 이루어진 상부저항체부(20)와, 동일 저항값(R2)을 가지는 4개의 저항체(31∼34)으로 이루어진 중앙부저항체부(30), 동일 저항값(R3)를 가지는 4개의 저항체(41∼44)로 이루어진 하부저항체부(40)가 차례로 배열되어 고정되어 있다.FIG. 2 is a state diagram of an arrangement of resistors of an oil sensor for a vehicle according to embodiments 1 and 2 of the present invention, along the longitudinal direction of the non-conductive plate / non-conductive rod 10 to the non-conductive plate / non-conductive rod 10. Upper resistor section 20 consisting of four resistors 21-24 having the same resistance value R1, and central resistor section 30 consisting of four resistors 31-34 having the same resistance value R2. The lower resistor portions 40 made up of four resistors 41 to 44 having the same resistance value R3 are arranged and fixed in sequence.

상기 각 저항체(21∼24, 31∼34, 41∼44)는 도선(예를 들어, 철선)으로 이루어지며, 저항값은 대략 100오옴 정도가 바람직한데, 상기와 같이 각 저항체(21∼24, 31∼34, 41∼44)를 25.4㎛의 직경을 가지는 철선으로 형성하게 되면 50cm의 길이의 철선이 필요하게 된다.Each of the resistors 21 to 24, 31 to 34, and 41 to 44 is made of a conductive wire (for example, iron wire), and a resistance value of about 100 ohms is preferable. As described above, each of the resistors 21 to 24, 31 to 34 and 41 to 44 are formed from iron wires having a diameter of 25.4 μm, a length of 50 cm is required.

이때, 차량용 오일센서는 약 5cm 정도의 오일레벨 변화를 감지하는 것이 필요하므로, 상기 도 2에 도시된 바와 같이 철선을 구부려서 배열시킨다. 또한, 각 저항체(21∼24, 31∼34, 41∼44)는 동일한 저항값을 갖고 열적으로도 동일한 조건하에 놓이는 것이 중요하므로, 이를 위해 철선의 길이가 동일하고 거리도 인접하여야 한다.At this time, since the vehicle oil sensor needs to detect an oil level change of about 5 cm, it is arranged by bending the wire as shown in FIG. In addition, it is important that each of the resistors 21 to 24, 31 to 34, and 41 to 44 have the same resistance value and is thermally placed under the same conditions. For this purpose, the lengths of the wires must be the same and the distances must be adjacent to each other.

도 3은 본 발명의 1실시예에 따른 차량용 오일센서의 회로도로서, 상기 도 2에 도시된 4개의 저항체(21, 31, 22, 42)가 차례로 직렬 접속되어 있고, 4개의 저항체(33, 23, 44, 24)가 차례로 직렬 접속되어 있으며, 상기 직렬 접속 4개의 저항체(21, 31, 22, 42)와 상기 직렬 접속된 4개의 저항체(33, 23, 44, 24)가 병렬로 접속된다. 이때, 상기 4개의 저항체(21, 31, 22, 42)의 합성 저항값(R1+R2+R1+R3)와 상기 4개의 저항체(33, 23, 44, 24)의 합성저항값(R2+R1+R3+R1)이 동일하므로, 전류(I)가 공급될때 양측에는 동일 전류(I/2)가 각각 흐르게 된다.FIG. 3 is a circuit diagram of an oil sensor for a vehicle according to an exemplary embodiment of the present invention, in which four resistors 21, 31, 22, and 42 shown in FIG. 2 are connected in series, and four resistors 33, 23. , 44, 24 are connected in series, and the four resistors 21, 31, 22, 42 in series connection and the four resistors 33, 23, 44, 24 connected in series are connected in parallel. At this time, the combined resistance values R1 + R2 + R1 + R3 of the four resistors 21, 31, 22, and 42 and the combined resistance values R2 + R1 of the four resistors 33, 23, 44, and 24. Since + R3 + R1 are the same, when the current I is supplied, the same current I / 2 flows to both sides, respectively.

그리고, 제1차동증폭기(50)는 3개의 저항체(31, 22, 42)에 걸리는 전압(V2+V1+V3)과, 3개의 저항체(23, 44, 24)에 걸리는 전압(V1+V3+V1)을 차동증폭하여 전압(V2-V1)을 마이컴(70)으로 출력한다.The first differential amplifier 50 includes the voltages V2 + V1 + V3 applied to the three resistors 31, 22, and 42, and the voltages V1 + V3 + applied to the three resistors 23, 44, and 24. The differential amplification of V1) outputs the voltage V2-V1 to the microcomputer 70.

또한, 제2차동증폭기(60)는 저항체(42)에 걸리는 전압(V3)와 저항체(24)에 걸리는 전압(V1)을 차동증폭하여 전압(V3-V1)을 마이컴(70)으로 출력한다.In addition, the second differential amplifier 60 differentially amplifies the voltage V3 applied to the resistor 42 and the voltage V1 applied to the resistor 24, and outputs the voltage V3-V1 to the microcomputer 70.

또, 마이컴(70)은 상기 전압(V2-V1)을 전압(V3-V1)으로 나눈값에 저항체의 길이(L)를 곱하여 오일레벨(h)을 산출하고, 산출된 오일레벨(h)을 오일레벨표시장치(80)에 표시한다.In addition, the microcomputer 70 calculates the oil level h by multiplying the length L of the resistor by dividing the voltage V2-V1 by the voltage V3-V1, and calculating the calculated oil level h. The oil level display device 80 displays it.

도 4는 본 발명의 2실시예에 따른 차량용 오일센서의 회로도로서, 상기 도 3에 도시된 각 저항체(21∼24, 31∼34, 41∼44)의 접속상태와 동일하며, 다만 저항체(31)과 저항체(22)의 사이점과 저항체(23)과 저항체(44)의 사이점이 전기적으로 접속되어 있는 점만 차이가 있다.FIG. 4 is a circuit diagram of an oil sensor for a vehicle according to an exemplary embodiment of the present invention, which is the same as the connection state of the resistors 21 to 24, 31 to 34, and 41 to 44 shown in FIG. ) And the point of connection between the resistor 22 and the resistor 23 and the resistor 44 are only electrically connected.

이때, 저항체(21, 31)의 합성 저항값(R1+R2)와 저항체(33, 23)의 합성 저항값(R2+R1)이 동일하므로, 전류(I)가 공급될때 양측에는 동일 전류(I/2)가 각각 흐르게 된다. 또한, 저항체(22, 42)의 합성 저항값(R1+R3)와 저항체(44, 24)의 합성 저항값(R3+R1)이 동일하므로, 전류(I)가 공급될때 양측에는 동일 전류(I/2)가 각각 흐르게 된다.At this time, since the combined resistance value R1 + R2 of the resistors 21 and 31 and the combined resistance value R2 + R1 of the resistors 33 and 23 are the same, when the current I is supplied, the same current I is applied to both sides. / 2) will flow respectively. In addition, since the combined resistance value R1 + R3 of the resistors 22 and 42 and the combined resistance value R3 + R1 of the resistors 44 and 24 are the same, when the current I is supplied, the same current I is applied to both sides. / 2) will flow respectively.

따라서, 제1차동증폭기(50)는 전압(V2-V1)을 마이컴(70)으로 출력하고, 제2차동증폭기(60)는 전압(V3-V1)을 마이컴(70)으로 출력하게 된다.Accordingly, the first differential amplifier 50 outputs the voltage V2-V1 to the microcomputer 70, and the second differential amplifier 60 outputs the voltage V3-V1 to the microcomputer 70.

또, 마이컴(70)은 상기 전압(V2-V1)을 전압(V3-V1)으로 나눈값에 저항체의 길이(L)를 곱하여 오일레벨(h)을 산출하고, 산출된 오일레벨(h)을 오일레벨표시장치(80)에 표시한다.In addition, the microcomputer 70 calculates the oil level h by multiplying the length L of the resistor by dividing the voltage V2-V1 by the voltage V3-V1, and calculating the calculated oil level h. The oil level display device 80 displays it.

한편, 도 5는 본 발명의 3실시예 및 4실시예에 따른 차량용 오일센서의 저항체 배열상태도로서, 도 2에 도시된 차량용 오일센서의 저항체 배열상태와 동일하며, 다만 상부저항체부(20)가 동일 저항값(R1)을 가지는 3개의 저항체(21, 22, 23)로 이루어지고, 중앙부저항체부(30)가 동일 저항값(R2)을 가지는 3개의 저항체(31, 32, 33)으로 이루어지며, 하부저항체부(40)가 동일 저항값(R3)를 가지는 3개의 저항체(41, 42, 43)로 이루어진다는 점에서 차이가 있다.On the other hand, Figure 5 is a resistor arrangement state of the vehicle oil sensor according to the third and fourth embodiments of the present invention, the same as the resistor arrangement state of the vehicle oil sensor shown in Figure 2, except that the upper resistor unit 20 It consists of three resistors 21, 22, 23 having the same resistance value R1, and the central resistor part 30 consists of three resistors 31, 32, 33 having the same resistance value R2. There is a difference in that the lower resistor portion 40 is composed of three resistors 41, 42, 43 having the same resistance value R3.

도 6은 본 발명의 3실시예에 따른 차량용 오일센서의 회로도로서, 상기 도 5에 도시된 3개의 저항체(21, 31, 41)가 차례로 직렬 접속되고, 3개의 저항체(32, 22, 42)가 차례로 직렬 접속되며, 3개의 저항체(33, 43, 23)가 차례로 직렬 접속되고, 상기 직렬 접속된 3개의 저항체(21, 31, 41)와 상기 직렬 접속된 3개의 저항체(32, 22, 42) 및 상기 직렬 접속된 3개의 저항체(33, 43, 23)가 병렬로 접속되어 있다. 이때, 상기 3개의 저항체(21, 31, 41)의 합성 저항값(R1+R2+R3)와 상기 3개의 저항체(32, 22, 42)의 합성저항값(R2+R1+R3) 및 상기 3개의 저항체(33, 43, 23)의 합성저항값(R2+R3+R1)이 동일하므로, 전류(I)가 공급될때 각 측으로 동일 전류(I/3)가 각각 흐르게 된다.FIG. 6 is a circuit diagram of an oil sensor for a vehicle according to an exemplary embodiment of the present invention, in which three resistors 21, 31, and 41 shown in FIG. 5 are connected in series, and three resistors 32, 22, and 42 are connected in series. Are sequentially connected in series, three resistors 33, 43, 23 are connected in series, and the three resistors 21, 31, 41 connected in series and the three resistors 32, 22, 42 connected in series are ) And the three resistors 33, 43, and 23 connected in series are connected in parallel. In this case, the combined resistance values R1 + R2 + R3 of the three resistors 21, 31, and 41, the combined resistance values R2 + R1 + R3 of the three resistors 32, 22, and 42, and the three Since the combined resistance values R2 + R3 + R1 of the two resistors 33, 43, and 23 are the same, the same current I / 3 flows to each side when the current I is supplied.

그리고, 제1차동증폭기(50)는 2개의 저항체(31, 41)에 걸리는 전압(V2+V3)과, 2개의 저항체(22, 42)에 걸리는 전압(V1+V3)을 차동증폭하여 전압(V2-V1)을 마이컴(70)으로 출력한다.The first differential amplifier 50 differentially amplifies the voltages V2 + V3 applied to the two resistors 31 and 41 and the voltages V1 + V3 applied to the two resistors 22 and 42. V2-V1) is output to the microcomputer 70.

또한, 제2차동증폭기(60)는 저항체(42)에 걸리는 전압(V3)과 저항체(23)에 걸리는 전압(V1)을 차동증폭하여 전압(V3-V1)을 마이콤(70)으로 출력한다.The second differential amplifier 60 differentially amplifies the voltage V3 applied to the resistor 42 and the voltage V1 applied to the resistor 23 and outputs the voltage V3-V1 to the microcomputer 70.

또, 마이컴(70)은 상기 전압(V2-V1)을 전압(V3-V1)으로 나눈값에 저항체의길이(L)를 곱하여 오일레벨(h)을 산출하고, 산출된 오일레벨(h)을 오일레벨표시장치(80)에 표시한다.In addition, the microcomputer 70 calculates the oil level h by multiplying the length L of the resistor by dividing the voltage V2-V1 by the voltage V3-V1, and calculating the calculated oil level h. The oil level display device 80 displays it.

도 7은 본 발명의 4실시예에 따른 차량용 오일센서의 회로도로서, 상기 도 5에 도시된 3개의 저항체(21, 41, 31)가 차례로 직렬 접속되고, 3개의 저항체(42, 22, 32)가 차례로 직렬 접속되며, 3개의 저항체(43, 33, 23)가 차례로 직렬 접속되어 있고, 상기 직렬 접속된 3개의 저항체(21, 41, 31)와 상기 직렬 접속된 3개의 저항체(42, 22, 32) 및 상기 직렬 접속된 3개의 저항체(43, 33, 23)가 병렬로 접속되어 있다. 이때, 상기 3개의 저항체(21, 41, 31)의 합성 저항값(R1+R3+R2)와 상기 3개의 저항체(42, 22, 32)의 합성저항값(R3+R1+R2) 및 상기 3개의 저항체(43, 33, 23)의 합성저항값(R3+R2+R1)이 동일하므로, 전류(I)가 공급될때 각 측으로 동일 전류(I/3)가 각각 흐르게 된다.7 is a circuit diagram of an oil sensor for a vehicle according to a fourth embodiment of the present invention, in which three resistors 21, 41, and 31 shown in FIG. 5 are connected in series, and three resistors 42, 22, and 32 are connected in series. Are sequentially connected in series, three resistors 43, 33, 23 are connected in series, and the three resistors 21, 41, 31 connected in series with the three resistors 42, 22, 32) and the three resistors 43, 33, 23 connected in series are connected in parallel. In this case, the combined resistance values R1 + R3 + R2 of the three resistors 21, 41, and 31, the combined resistance values R3 + R1 + R2 of the three resistors 42, 22, and 32, and the three Since the combined resistance values R3 + R2 + R1 of the three resistors 43, 33, and 23 are the same, the same current I / 3 flows to each side when the current I is supplied.

그리고, 제1차동증폭기(50)는 2개의 저항체(41, 31)에 걸리는 전압(V3+V2)과, 2개의 저항체(22, 32)에 걸리는 전압(V1+V2)을 차동증폭하여 전압(V3-V1)을 마이컴(70)으로 출력한다.The first differential amplifier 50 differentially amplifies the voltages V3 + V2 applied to the two resistors 41 and 31 and the voltages V1 + V2 applied to the two resistors 22 and 32. V3-V1) is output to the microcomputer 70.

또한, 제2차동증폭기(60)는 저항체(32)에 걸리는 전압(V2)와 저항체(23)에 걸리는 전압(V1)을 차동증폭하여 전압(V2-V1)을 마이컴(70)으로 출력한다.The second differential amplifier 60 differentially amplifies the voltage V2 applied to the resistor 32 and the voltage V1 applied to the resistor 23 and outputs the voltages V2-V1 to the microcomputer 70.

또, 마이컴(70)은 상기 전압(V2-V1)을 전압(V3-V1)으로 나눈값에 저항체의 길이(L)를 곱하여 오일레벨(h)을 산출하고, 산출된 오일레벨(h)을 오일레벨표시장치(80)에 표시한다.In addition, the microcomputer 70 calculates the oil level h by multiplying the length L of the resistor by dividing the voltage V2-V1 by the voltage V3-V1, and calculating the calculated oil level h. The oil level display device 80 displays it.

이상에서 설명한 바와 같이 본 발명에 따르면, 저항체의 저항값이 온도에 따라 바뀌는 현상을 이용하여, 오일팬내의 기체부분에 노출된 저항체와, 오일부분에 노출된 오일부분에 노출된 저항체, 기체와 오일에 걸쳐 있는 저항체의 저항차를 이용하여 오일레벨을 측정함으로써, 그 구성이 매우 간단할 뿐만 아니라 오일레벨을 정확하게 측정할 수 있는 효과가 있다.As described above, according to the present invention, a resistor exposed to a gas part in an oil pan, a resistor exposed to an oil part exposed to an oil part, a gas and oil by using a phenomenon in which the resistance value of the resistor changes with temperature. By measuring the oil level by using the resistance difference of the resistor across the structure, not only the configuration is very simple, but the oil level can be measured accurately.

Claims (4)

비전도체에 비전도체의 길이방향을 따라 동일 저항값(R1)을 가지는 4개의 저항체(21∼24)로 이루어진 상부저항체부와, 동일 저항값(R2)을 가지는 4개의 저항체(31∼34)으로 이루어진 중앙부저항체부, 동일 저항값(R3)를 가지는 4개의 저항체(41∼44)로 이루어진 하부저항체부가 차례로 배열되어 고정되며, 4개의 저항체(21, 31, 22, 42)가 차례로 직렬 접속됨과 더불어 4개의 저항체(33, 23, 44, 24)가 차례로 직렬 접속되고, 상기 직렬 접속된 저항체(21, 31, 22, 42)와 직렬 접속된 저항체(33, 23, 44, 24)가 병렬로 접속되어 있는 한편,An upper resistor portion consisting of four resistors 21 to 24 having the same resistance value R1 in the non-conductor along the longitudinal direction of the non-conductor, and four resistors 31 to 34 having the same resistance value R2. The center resistor unit, the lower resistor unit consisting of four resistors 41 to 44 having the same resistance value R3 are arranged and fixed in turn, and the four resistors 21, 31, 22, and 42 are connected in series. Four resistors 33, 23, 44, 24 are connected in series, and the resistors 21, 31, 22, 42 connected in series and the resistors 33, 23, 44, 24 connected in series are connected in parallel. In the meantime, 저항체(31, 22, 42)에 걸리는 전압(V2+V1+V3)과, 저항체(23, 44, 24)에 걸리는 전압(V1+V3+V1)을 차동증폭하여 전압(V2-V1)을 출력하는 제1차동증폭기와, 저항체(42)에 걸리는 전압(V3)와 저항체(24)에 걸리는 전압(V1)을 차동증폭하여 전압(V3-V1)을 출력하는 제2차동증폭기, 상기 전압(V2-V1)을 전압(V3-V1)으로 나눈값에 저항체의 길이(L)를 곱하여 오일레벨을 산출하고, 산출된 오일레벨을 오일레벨표시장치에 표시하는 마이컴을 포함하여 구성된 것을 특징으로 하는 차량용 오일센서.The voltage V2 + V1 + V3 applied to the resistors 31, 22, and 42 and the voltage V1 + V3 + V1 applied to the resistors 23, 44, and 24 are differentially amplified to output the voltages V2-V1. A second differential amplifier which differentially amplifies the first differential amplifier and the voltage V3 applied to the resistor 42 and the voltage V1 applied to the resistor 24 and outputs the voltages V3-V1, and the voltage V2. -V1) divided by the voltage (V3-V1) multiplied by the length (L) of the resistor to calculate the oil level, and comprises a microcomputer for displaying the calculated oil level on the oil level display device Oil sensor. 제 1 항에 있어서,The method of claim 1, 상기 저항체(31, 22)의 사이점과 상기 저항체(23, 44)의 사이점이 접속되어 있는 것을 특징으로 하는 차량용 오일센서.An oil sensor for a vehicle, wherein an intermediate point between the resistors (31, 22) and an intermediate point between the resistors (23, 44) are connected. 비전도체에 비전도체의 길이방향을 따라 동일 저항값(R1)을 가지는 3개의 저항체(21∼23)로 이루어진 상부저항체부와, 동일 저항값(R2)을 가지는 3개의 저항체(31∼33)으로 이루어진 중앙부저항체부, 동일 저항값(R3)를 가지는 3개의 저항체(41∼43)로 이루어진 하부저항체부가 차례로 배열되어 고정되며, 3개의 저항체(21, 31, 41)가 차례로 직렬 접속되고, 3개의 저항체(32, 22, 42)가 차례로 직렬 접속되며, 3개의 저항체(33, 43, 23)가 차례로 직렬 접속되고, 상기 직렬 접속된 저항체(21, 31, 41)와 직렬 접속된 저항체(32, 22, 42) 및 직렬 접속된 3개의 저항체(33, 43, 23)가 병렬로 접속되어 있는 한편,An upper resistor portion consisting of three resistors 21 to 23 having the same resistance value R1 in the non-conductor along the longitudinal direction of the non-conductor, and three resistors 31 to 33 having the same resistance value R2. The lower resistor unit consisting of three resistors 41 to 43 having the same resistance value R3 and the center resistor unit formed in this order are arranged and fixed in series, and the three resistors 21, 31 and 41 are connected in series, and three The resistors 32, 22, 42 are sequentially connected in series, the three resistors 33, 43, 23 are connected in series, and the resistors 32, which are connected in series with the resistors 21, 31, 41 connected in series, 22, 42 and three resistors 33, 43, 23 connected in series are connected in parallel, 저항체(31, 41)에 걸리는 전압(V2+V3)과, 저항체(22, 42)에 걸리는 전압(V1+V3)을 차동증폭하여 전압(V2-V1)을 출력하는 제1차동증폭기, 저항체(42)에 걸리는 전압(V3)와 저항체(23)에 걸리는 전압(V1)을 차동증폭하여 전압(V3-V1)을 출력하는 제2차동증폭기, 상기 전압(V2-V1)을 전압(V3-V1)으로 나눈값에 저항체의 길이(L)를 곱하여 오일레벨을 산출하고, 산출된 오일레벨을 오일레벨표시장치에 표시하는 마이컴을 포함하여 구성된 것을 특징으로 하는 차량용 오일센서.A first differential amplifier and a resistor that differentially amplifies the voltages V2 + V3 applied to the resistors 31 and 41 and the voltages V1 + V3 applied to the resistors 22 and 42 and outputs the voltages V2-V1. A second differential amplifier which differentially amplifies the voltage V3 applied to the resistor 42 and the voltage V1 applied to the resistor 23 and outputs the voltage V3-V1, and converts the voltages V2-V1 to the voltage V3-V1. The oil sensor for a vehicle, comprising: a microcomputer dividing the value divided by) by a length L of the resistor to calculate the oil level, and displaying the calculated oil level on the oil level display device. 비전도체에 비전도체의 길이방향을 따라 동일 저항값(R1)을 가지는 3개의 저항체(21∼23)로 이루어진 상부저항체부와, 동일 저항값(R2)을 가지는 3개의 저항체(31∼33)으로 이루어진 중앙부저항체부, 동일 저항값(R3)를 가지는 3개의 저항체(41∼43)로 이루어진 하부저항체부가 차례로 배열되어 고정되며, 3개의저항체(21, 41, 31)가 차례로 직렬 접속되고, 3개의 저항체(42, 22, 32)가 차례로 직렬 접속되며, 3개의 저항체(43, 33, 23)가 차례로 직렬 접속되고, 상기 직렬 접속된 저항체(21, 41, 31)와 직렬 접속된 저항체(42, 22, 32) 및 직렬 접속된 저항체(43, 33, 23)가 병렬로 접속되어 있는 한편, 저항체(41, 31)에 걸리는 전압(V3+V2)과, 저항체(22, 32)에 걸리는 전압(V3+V2)을 차동증폭하여 전압(V3-V1)을 출력하는 제1차동증폭기, 저항체(32)에 걸리는 전압(V2)와 저항체(23)에 걸리는 전압(V1)을 차동증폭하여 전압(V2-V1)을 출력하는 제2차동증폭기, 상기 전압(V2-V1)을 전압(V3-V1)으로 나눈값에 저항체의 길이(L)를 곱하여 오일레벨을 산출하고, 산출된 오일레벨을 오일레벨표시장치에 표시하는 마이컴을 포함하여 구성된 것을 특징으로 하는 차량용 오일센서.An upper resistor portion consisting of three resistors 21 to 23 having the same resistance value R1 in the non-conductor along the longitudinal direction of the non-conductor, and three resistors 31 to 33 having the same resistance value R2. The lower resistor part made up of three resistors 41 to 43 having the same resistance value R3 is arranged and fixed in sequence, and the three resistors 21, 41, and 31 are connected in series and three The resistors 42, 22, and 32 are connected in series, and the three resistors 43, 33, and 23 are connected in series, and the resistors 42, which are connected in series with the resistors 21, 41, and 31 connected in series. 22 and 32 and resistors 43, 33 and 23 connected in series are connected in parallel, while voltages (V3 + V2) applied to resistors 41 and 31 and voltages applied to resistors 22 and 32 ( A first differential amplifier for differentially amplifying V3 + V2 to output the voltage V3-V1, a voltage V2 applied to the resistor 32, and a voltage V applied to the resistor 23. The second differential amplifier outputs the voltage (V2-V1) by differentially amplifying 1), and the oil level is calculated by multiplying the length (L) of the resistor by dividing the voltage (V2-V1) by the voltage (V3-V1). And a microcomputer for displaying the calculated oil level on the oil level display device.
KR10-2000-0081600A 2000-12-26 2000-12-26 Oil sensor for vehicle KR100387831B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR10-2000-0081600A KR100387831B1 (en) 2000-12-26 2000-12-26 Oil sensor for vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR10-2000-0081600A KR100387831B1 (en) 2000-12-26 2000-12-26 Oil sensor for vehicle

Publications (2)

Publication Number Publication Date
KR20020052360A true KR20020052360A (en) 2002-07-04
KR100387831B1 KR100387831B1 (en) 2003-06-18

Family

ID=27685665

Family Applications (1)

Application Number Title Priority Date Filing Date
KR10-2000-0081600A KR100387831B1 (en) 2000-12-26 2000-12-26 Oil sensor for vehicle

Country Status (1)

Country Link
KR (1) KR100387831B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040045068A (en) * 2002-11-22 2004-06-01 현대자동차주식회사 Fuel sender appraising method

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5828625A (en) * 1981-08-14 1983-02-19 Hitachi Ltd Liquid level sensor
JPH01288729A (en) * 1988-05-16 1989-11-21 Ngk Spark Plug Co Ltd Liquid level detector
JPH0510805A (en) * 1991-07-03 1993-01-19 Matsushita Electric Ind Co Ltd Heat-sensitive type detector of residual quantity of fuel
KR950008143B1 (en) * 1992-07-10 1995-07-25 재단법인한국화학연구소 Method of preparing modified polyethylens
KR100384138B1 (en) * 2000-04-18 2003-05-14 현대자동차주식회사 Sensor for oil sounding and oil sounding device using it
KR100401825B1 (en) * 2000-06-16 2003-10-17 현대자동차주식회사 Oil level measurement by using unsteady hot-wire method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040045068A (en) * 2002-11-22 2004-06-01 현대자동차주식회사 Fuel sender appraising method

Also Published As

Publication number Publication date
KR100387831B1 (en) 2003-06-18

Similar Documents

Publication Publication Date Title
CN1224826C (en) Liquid level sensor
US7151383B2 (en) Oil condition sensor
US6553812B2 (en) Combined oil quality and viscosity sensing system
US6377052B1 (en) Monitoring fluid condition through an aperture
US7222528B2 (en) Fluid level sensor
EP1020714A2 (en) Fluid level detector using thermoresistive sensor
US7391225B1 (en) Carbon nanotube sensor and apparatus and method for detecting change time of engine oil for automobile using the same
CA1210832A (en) Engine oil level sensor
US4988975A (en) Dip stick resistive liquid level detector with adjustable stop
UA71033C2 (en) Device for measuring a clearance between workpieces by the value of abrasive wear
BR0005347A (en) Sensor probe assembly and method for monitoring the condition of a fluid
ES2275944T3 (en) MEASUREMENT DEVICE FOR THE DETERMINATION OF A PROPERTY OF A FLUID.
EP1562031A2 (en) Leakage drain
KR100387831B1 (en) Oil sensor for vehicle
US10024813B2 (en) Gas detection apparatus
JP2009210503A (en) Liquid level sensor
KR101485241B1 (en) Dipstick gage with oil deterioration detection sensor
KR100384138B1 (en) Sensor for oil sounding and oil sounding device using it
EP2112481B1 (en) Device for reading the engine oil level
US20060214654A1 (en) [conducting structure of a meter]
JPH0720049A (en) Liquid property detecting device
KR100715895B1 (en) Engine oil sensing and alarm device
KR100412807B1 (en) Oil-level indicator of engine for automobile
JP2004205519A (en) Flow sensor
KR100223547B1 (en) automotive fuel detecting gaugeunit digital dispiay system

Legal Events

Date Code Title Description
A201 Request for examination
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
LAPS Lapse due to unpaid annual fee