KR100802731B1 - Fuel gauge for vehicle - Google Patents

Fuel gauge for vehicle Download PDF

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Publication number
KR100802731B1
KR100802731B1 KR1020060075430A KR20060075430A KR100802731B1 KR 100802731 B1 KR100802731 B1 KR 100802731B1 KR 1020060075430 A KR1020060075430 A KR 1020060075430A KR 20060075430 A KR20060075430 A KR 20060075430A KR 100802731 B1 KR100802731 B1 KR 100802731B1
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KR
South Korea
Prior art keywords
fuel
transmission line
cable
vehicle
fuel tank
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KR1020060075430A
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Korean (ko)
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박재화
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현대자동차주식회사
경창산업주식회사
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Priority to KR1020060075430A priority Critical patent/KR100802731B1/en
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    • 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
    • G01F23/26—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 capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
    • G01F25/20—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of apparatus for measuring liquid level
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • B60K2015/0321—Fuel tanks characterised by special sensors, the mounting thereof
    • B60K2015/03217—Fuel level sensors

Abstract

A fuel gauge for a vehicle is provided to vary actual length of a cable and compensate fuel amount depending on the shape of a fuel tank having different sections based on the height, thereby measuring the amount of fuel more accurately. A fuel gauge for a vehicle includes a fuel tank(10), a cable, and a circuit part. The cable is inserted in the fuel tank. The circuit part is connected to an upper end of the cable to measure high frequency supply and reflection waves. The cable is installed in a plastic or glass pipe having an open lower end, and fuel is filled between the cable to prevent rapid height variation of the fuel due to movement of the vehicle. A chip load resistor is attached to a lower end of the cable. The cable and the load resistor are waterproofed by urethane or vinyl resin.

Description

차량용 연료게이지{Fuel gauge for vehicle}Fuel gauge for vehicle {Fuel gauge for vehicle}

도 1은 종래의 연료탱크 내에 장착된 전자식 연료게이지를 나타내는 이미지이고,1 is an image showing an electronic fuel gauge mounted in a conventional fuel tank,

도 2a는 규격화된 용기의 연료탱크를 나타내는 단면도이고,2A is a cross-sectional view showing a fuel tank of a standardized container,

도 2b는 도 2a의 연료탱크의 유면높이에 따른 유량의 변화를 나타내는 그래프이고,Figure 2b is a graph showing the change in flow rate according to the oil level of the fuel tank of Figure 2a,

도 3은 본 발명에 따른 전자식 연료게이지가 연료탱크에 장착된 일실시예를 나타내는 구성도이고,3 is a block diagram showing an embodiment in which the electronic fuel gauge according to the present invention is mounted to the fuel tank,

도 3a는 도 3의 연료게이지의 일실시예를 나타내는 구성도이고,3A is a block diagram showing an embodiment of the fuel gauge of FIG. 3,

도 4는 실제 차량의 연료탱크의 일례를 나타내는 단면도이고,4 is a cross-sectional view showing an example of a fuel tank of an actual vehicle,

도 5는 도 4의 연료탱크의 유면 높이에 따른 유량의 변화를 나타내는 그래프이고,5 is a graph showing a change in flow rate according to the oil level of the fuel tank of FIG.

도 6은 본 발명의 연료침적 전송선 길이에 따른 유량의 변화를 나타내는 그래프이다.6 is a graph showing a change in flow rate according to the fuel deposition transmission line length of the present invention.

<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

10 : 연료탱크 11 : 전송선10 fuel tank 11 transmission line

11a : 절곡부 12 : 회로부11a: bend portion 12: circuit portion

13 : 유리관 14 : 부하저항13 glass tube 14 load resistance

본 발명은 차량용 연료게이지에 관한 것으로서, 더욱 상세하게는 종래의 전송선로를 이용한 연료게이지에 있어서, 종래의 전송선은 일직선으로 되어 연료탱크의 형상변화에 따른 유량의 변화로 인해 정확한 연료량 측정이 불가능했던점을 개선하여, 전송선을 유면 높이에 따른 용량 변화에 맞춰서 각도를 줌으로써, 연료탱크의 형상변화에 따른 연료량을 보정하여 보다 정확히 측정할 수 있도록 한 차량용 연료게이지에 관한 것이다.The present invention relates to a fuel gauge for a vehicle, and more particularly, in a fuel gauge using a conventional transmission line, the conventional transmission line is in a straight line so that accurate fuel amount measurement was impossible due to a change in flow rate due to a change in shape of the fuel tank. By improving the point, the transmission line is angled in accordance with the change in capacity according to the oil level, the fuel gauge for the vehicle to correct the amount of fuel according to the shape change of the fuel tank to be able to measure more accurately.

현재 이용되고 있는 자동차 연료 게이지는 연료탱크 속에 뜨개(공기통)을 띄워 연료의 양을 측정하는 방식을 사용하고 있다. 이는 공기가 연료보다 가벼운 원리를 적용한 것이다.Currently used car fuel gauges use a method of measuring the amount of fuel by floating a float in the fuel tank. This applies the principle that air is lighter than fuel.

상기 연료탱크 속에 있는 뜨개가 연료의 양이 변함에 따라 뜨개의 위치가 변하고, 뜨개에 연결된 뜨개 암이 세라믹 저항판 위를 이동하며 접점을 변화시키고, 접점이 변화함에 따라 저항의 크기가 변하게 되므로, 저항값의 변화를 이용하여 운전석 클러스터의 연료게이지에 연료의 양을 표시하게 된다.Since the knitting in the fuel tank changes the amount of fuel, the position of the knitting changes, and the knitting arm connected to the knitting moves on the ceramic resistance plate to change the contact point, and the size of the resistance changes as the contact point changes. The change in resistance value is used to indicate the amount of fuel in the fuel gauge of the driver's cluster.

그러나 상기 뜨개 및 세라믹 저항판을 이용한 방법은 다음과 같은 문제점을 가지고 있다.However, the method using the knit and the ceramic resistor plate has the following problems.

1) 연료탱크 내 연료량 변화에 따라 뜨개의 위치가 달라지면서 세라믹 저항판과 접촉에 의해서 감지하는 방식이어서 접촉면의 마모 및 마찰로 인한 내구력이 문제가 되고,1) As the position of the float changes according to the change of fuel amount in the fuel tank, it is detected by contact with the ceramic resistance plate, so durability of wear and friction of the contact surface becomes a problem.

2) 세라믹 저항판의 저항이 불연속적으로 구성되어 있으므로 선형적인 표시에 한계가 있고,2) Since the resistance of the ceramic resistor plate is configured discontinuously, there is a limit to linear display.

3) 뜨개에 이물질이 끼일 경우 부력에 장애가 발생하여 오차가 발생하거나, 고장이 나기 쉽다는 점이다.3) If foreign matter gets stuck in the knitting, it is easy to cause an error or breakdown due to the failure of buoyancy.

4) 클러스터의 연료게이지 제어방식은 연료센서로부터 들어오는 입력값(저항)을 전압으로 변환시키기 위하여 풀-업(PULL-UP)저항이 있어야 하므로 제조원가를 상승시키고,4) In the fuel gauge control method of the cluster, there is a pull-up resistor in order to convert the input value (resistance) coming from the fuel sensor into voltage, thereby increasing the manufacturing cost,

5) 뜨개의 부력에 따라 저항 값이 변하는 가변저항을 사용하기 때문에 가변저항의 접점부 부식에 의한 오차 혹은 고장의 발생이 잦다는 점이다.5) Because variable resistance is changed according to the buoyancy of the knitting, error or failure occurs frequently due to corrosion of the contact part of the variable resistor.

따라서 공기의 부력을 이용하지 않고, 가변저항 같은 소자의 사용이 없는 새로운 형태의 게이지 장치가 필요하며, 더구나 게이지의 대상이 폭발성이 강한 휘발유 등의 연료이기 때문에 전류가 흐르는 센서 혹은 전등, 전기장치의 직접적인 사용이 없는 센서장치를 갖춘 연료 게이지의 개발이 요구된다.Therefore, a new type of gauge device is needed that does not use air buoyancy and does not use elements such as variable resistors. Moreover, since the gauge is a fuel such as highly explosive gasoline, it is necessary to The development of fuel gauges with sensor devices without direct use is required.

상기와 같은 문제점을 해결하기 위해 공기의 부력을 이용하지 않고, 가변저항 같은 소자를 사용하지 않으며, 전류가 흐르는 센서 혹은 전등, 전기장치를 직접적으로 사용하지 않음으로써, 기계적인 결함이나 장치의 부식에 의한 게이지의 결 함이나 고장이 발생하는 것을 방지할 수 있는 연료게이지가 제안되어, 폭발성이 강한 휘발유 등의 연료탱크에도 안전하게 장착할 수 있다.In order to solve the above problems, it does not use the buoyancy of the air, does not use elements such as variable resistors, and does not directly use the sensor, lamp, or electric device through which current flows, thereby preventing mechanical defects or corrosion of the device. A fuel gauge has been proposed to prevent gage defects and failures from occurring and can be safely installed in fuel tanks such as highly explosive gasoline.

상기 연료게이지는 전송선 이론에 의한 고주파 선로에 의한 반사량 혹은 캐패시턴스 전압으로 연료량을 측정하는 방법이다.The fuel gauge is a method of measuring the fuel amount by the reflection amount or the capacitance voltage by the high frequency line according to the transmission line theory.

즉, 상기 연료게이지는 도 1에 도시한 바와 같이 2선로 전송선(100)을 이용하여 구현한 연료게이지에 있어서, 연료 깊이에 따라 캐패시턴스가 달라짐과 동시에 특성임피던스가 변화하여 반사계수가 달라지므로 반사파 혹은 캐패시턴스 전압을 측정하면 연료의 깊이를 알 수 있는 원리를 이용하여, 전송선에서 반사된 반사파 혹은 캐패시턴스 전압을 측정하고 이를 증폭하여 연료량을 운전석 앞 클러스터에 표시하도록 한다.That is, the fuel gauge in the fuel gauge implemented using the two-line transmission line 100 as shown in Figure 1, because the capacitance is changed depending on the fuel depth and the characteristic impedance is changed to reflect the reflection coefficient, or so By measuring the capacitance voltage, the depth of the fuel can be measured using the principle of measuring the reflected wave or capacitance voltage reflected from the transmission line and amplifying it so that the fuel level is displayed on the cluster in front of the driver's seat.

보다 상세하게는, 상기 전송선(100) 종단에 칩 저항(101)이 부착되어 있고, 전송선에 고주파를 인가하면 동시에 같은 선에 반사파가 발생되게 되는데, 연료가 비어 있을 때는 전송선 사이에 공기만 있으므로 전송선의 임피던스와 종단저항이 같게 되어 반사파가 존재하지 않는다.More specifically, the chip resistor 101 is attached to the end of the transmission line 100, and when a high frequency is applied to the transmission line, the reflected wave is generated on the same line at the same time. The impedance and the terminating resistance of are the same, so there is no reflected wave.

상기 전송선에 연료가 채워지면 전송선이 연료에 잠겨있는 부분과 잠겨있지 않은 부분간에 매체(유체)의 변화 즉 공기에서 연료로 변화로 인해 임피던스 값이 변화하게 되고, 이러한 변화로 반사파가 발생하게 된다.When the transmission line is filled with fuel, the impedance value is changed due to the change of the medium (fluid), that is, the air to the fuel, between the portion in which the transmission line is immersed in the fuel and the non-locked portion, and the reflected wave is generated by the change.

상기 반사량은 연료의 높이가 높아질수록 많아지게 되고, 이러한 방식에 의해 반사파의 크기로 유량을 감지할 수 있다.The reflection amount increases as the height of the fuel increases, and in this way, the flow rate can be detected by the magnitude of the reflected wave.

그런데, 상기 전송선이 일직선으로 되어 있으므로, 연료탱크가 직(정)육면체 나 원통형처럼 연료유면 높이 변화에 따른 단면적의 변화가 없는 경우에는 연료량 감지에 문제가 없으나, 일반적으로 차량의 연료탱크 형상은 유면 높이변화에 따라 단면적이 변화하므로 연료량의 정확한 감지가 불가능하여 별도의 보정이 요구된다.However, since the transmission line is in a straight line, there is no problem in detecting the fuel amount when the fuel tank does not have a change in cross-sectional area due to the change in height of the fuel surface, such as a straight cube or a cylinder, but in general, the shape of the fuel tank of the vehicle is oil level. As the cross-sectional area changes according to the height change, it is impossible to accurately detect the amount of fuel and requires additional correction.

즉, 도 2a 및 도 2b에 도시한 바와 같이 연료탱크(102)의 형상이 직육면체인 경우에는 유면 높이변화에 따른 단면적의 변화가 없으므로, 유면높이에 따른 유량이 선형적으로 일정하게 증가하지만, 실제 차량용 연료탱크(10)의 높이에 따른 단면적의 변화가 있는 경우에는 유면높이에 따른 유량이 비선형적으로 증가하게 된다.That is, as shown in FIGS. 2A and 2B, when the shape of the fuel tank 102 is a rectangular parallelepiped, since there is no change in the cross-sectional area due to the change in the oil level, the flow rate increases linearly and uniformly according to the oil level. When there is a change in the cross-sectional area according to the height of the vehicle fuel tank 10, the flow rate according to the oil level is increased non-linearly.

따라서, 연료의 높이에 따른 반사파의 크기로 연료량을 감지하는 방식은 부정확한 문제가 있다.Therefore, the method of detecting the amount of fuel by the magnitude of the reflected wave according to the height of the fuel has an inaccurate problem.

본 발명은 상기와 같은 점을 감안하여 안출한 것으로서, 기존의 전송선을 일직선에서 구간별 용량 변화로 맞춰서 각도를 줌으로써, 전송선의 실길이에 변화를 줌으로써, 연료탱크의 형상변화에 따른 연료량을 보정하여 보다 정확하게 측정할 수 있도록 한 차량용 연료게이지를 제공하는데 그 목적이 있다.The present invention has been made in view of the above, by adjusting the angle of the existing transmission line from the straight line to the capacity change for each section, by changing the actual length of the transmission line, to correct the amount of fuel according to the shape change of the fuel tank The aim is to provide a fuel gauge for a vehicle that allows for more accurate measurements.

상기한 목적을 달성하기 위한 본 발명은 차량용 연료게이지에 있어서,The present invention for achieving the above object is a fuel gauge for a vehicle,

연료탱크 내부에 수직방향으로 설치된 전송선과; 상기 전송선 상단에 고주파 공급 및 반사파를 측정하도록 설치된 회로부와; 상기 전송선 하단에 부착된 부하저항;을 포함하여 구성되고, 상기 전송선에는 서로 다른 각도로 절곡부가 형성되어 유면 높이에 따라 연료가 침적되는 전송선 길이가 다르게 설정되는 것을 특징으로 한다.A transmission line installed vertically inside the fuel tank; A circuit unit disposed on the transmission line to measure high frequency supply and reflected waves; And a load resistor attached to the lower end of the transmission line, wherein the transmission line is bent at different angles to set a transmission line length at which fuel is deposited according to oil level.

바람직한 구현예로서, 상기 전송선은 일정한 간격으로 평행하게 형성된 2개의 선이 하단부가 개구된 용기의 내부에 설치된 구조인 것을 특징으로 한다.In a preferred embodiment, the transmission line is characterized in that the two lines formed in parallel at regular intervals is installed in the interior of the container with the lower end opening.

더욱 바람직한 구현예로서, 상기 전송선은 구간별로 용량 변화에 따라 절곡되는 각도 및 절곡부의 수가 다르게 형성되되, 용량이 큰 구간에서는 절곡되는 각도가 크고 절곡부의 수가 증가하여 유면 높이에 따라 연료가 상기 전송선 사이에 침적되는 길이가 증가하는 것을 특징으로 한다.In a more preferred embodiment, the transmission line is formed in different angles and the number of bends in accordance with the change in capacity for each section, in the large capacity section the angle of bending and the number of the bent portion increases the fuel between the transmission line according to the oil level It is characterized by an increase in the length of the deposit.

이하, 본 발명의 바람직한 실시예를 첨부도면을 참조로 상세하게 설명한다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 3은 본 발명에 따른 전자식 연료게이지의 일실시예를 나타내는 구성도이고, 도 4는 실제 차량의 연료탱크의 일례를 나타내는 단면도이고, 도 5는 도 4의 연료탱크의 유면 높이에 따른 유량의 변화를 나타내는 그래프이고, 도 6은 본 발명의 연료침적 전송선 길이에 따른 유량의 변화를 나타내는 그래프이다.3 is a block diagram showing an embodiment of an electronic fuel gauge according to the present invention, Figure 4 is a cross-sectional view showing an example of the fuel tank of the actual vehicle, Figure 5 is a flow rate of the oil level of the fuel tank of Figure 4 6 is a graph showing a change, and FIG. 6 is a graph showing a change in flow rate according to the fuel deposition transmission line length of the present invention.

본 발명은 고주파 선로에 의한 반사량 혹은 캐패시턴스 전압으로 연료량을 측정하는 차량용 연료게이지에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel gauge for a vehicle measuring fuel amount by a reflection amount or a capacitance voltage by a high frequency line.

상기 연료게이지는 연료탱크(10)의 내부에는 전송선(11)이 들어있고, 전송선의 상단에는 전송선(11)에 고주파 공급 및 반사파를 측정하는 회로부(12)가 연결된다.The fuel gauge includes a transmission line 11 inside the fuel tank 10, and a circuit portion 12 measuring high frequency supply and reflected waves is connected to the transmission line 11 at an upper end of the transmission line.

상기 전송선(11)은 하단부가 뚫린 프라스틱 혹은 유리관(13) 내에 설치되고, 연료가 전송선(11) 사이에 채워지도록 함과 동시에 자동차 움직임에 따른 급격한 연료의 높이 변화를 막는다.The transmission line 11 is installed in a plastic or glass tube 13 having a lower end portion, and the fuel is filled between the transmission lines 11 and prevents a sudden change in the height of the fuel due to the movement of the vehicle.

상기 전송선(11)의 하단에는 칩(chip) 부하저항(14)을 부착한다. 전송선(11)과 부하저항(14)은 우레탄 혹은 비닐수지 등의 부도체로 완전방수 처리한다.A chip load resistor 14 is attached to the lower end of the transmission line 11. The transmission line 11 and the load resistor 14 are completely waterproofed with an insulator such as urethane or vinyl resin.

여기서, 본 발명에 따른 전송선(11)은 용량이 변화되는 구간(유면의 높이)에 따라 일정한 각도로 절곡되고, 구간별 절곡되는 각도 및 절곡되는 횟수도 다르게 된다.Here, the transmission line 11 according to the present invention is bent at a certain angle according to the section (the height of the oil surface) in which the capacity is changed, the angle and the number of times the bent by the section is also different.

전송선이 일직선인 경우에는 연료탱크(10) 내 채워지는 연료의 유면높이에 따라 연료량이 선형적으로 증가하는 것으로 측정하나, 도 4 및 도 5에 도시한 바와 같이, 실제 차량에 장착되는 연료탱크(10)는 구간마다 연료용량이 다르다. When the transmission line is in a straight line, the fuel amount is measured to increase linearly according to the oil level of the fuel filled in the fuel tank 10. However, as shown in FIGS. 4 and 5, the fuel tank mounted on the actual vehicle ( 10) shows different fuel capacity for each section.

예를 들어, 제1구간에서 연료용량이 0.5이고, 제2구간에서는 1.5, 제3구간에서 3.5, 제4구간에서 4.5이고, 제5구간에서는 5(누적된 값)으로, 상기 제3구간에서 연료의 변화량이 가장 크다. For example, the fuel capacity is 0.5 in the first section, 1.5 in the second section, 3.5 in the third section, 4.5 in the fourth section, 5 (accumulated value) in the fifth section, and in the third section. The amount of change in fuel is greatest.

이와 같이 전송선에 채워지는 연료량에 따라 변화하는 반사파의 크기로 연료량을 측정하는 전자파 연료게이지의 측정값을 보정하기 위해, 상기 구간별로 용량변화에 맞춰서 전송선(11)이 일정한 각도로 경사지게 형성되도록 함으로써, 실제 길이가 증가하여 연료 탱크(10) 형상에 따른 연료량을 보정할 수 있다.As described above, in order to correct the measured value of the electromagnetic fuel gauge for measuring the fuel amount with the magnitude of the reflected wave that changes according to the amount of fuel filled in the transmission line, the transmission line 11 is formed to be inclined at a predetermined angle in accordance with the capacity change for each section. The actual length is increased to correct the fuel amount according to the shape of the fuel tank 10.

즉, 제1구간보다 연료용량이 큰 제2구간에서 전송선이 일정한 각도로 절곡된 다음, 다시 한번 반대로 절곡되고, 제2구간보다 연료용량이 큰 3구간에서는 전송선 이 절곡되는 각도가 크고, 절곡부(11a)가 2번 형성되므로, 제3구간에서 전송선(11) 사이에 채워지는 연료량이 많아지게 된다.That is, the transmission line is bent at a constant angle in the second section having a larger fuel capacity than the first section, and then reversed again, and the angle at which the transmission line is bent is large at the three sections having a larger fuel capacity than the second section. Since 11a is formed twice, the amount of fuel filled between the transmission lines 11 in the third section increases.

따라서, 상기 제3구간에서는 전송선(11)이 연료에 잠겨진 부분과 잠기지 않은 부분간에 매체의 변화로 인한 임피던스값의 변화량이 다른 구간에 비해 커지고, 이로 인해 발생되는 반사파의 크기도 크게 변하여 연료탱크의 형상에 따른 연료량을 보정할 수 있다.Therefore, in the third section, the amount of change in the impedance value due to the change of the medium between the portion where the transmission line 11 is immersed in the fuel and the portion that is not immersed is larger than that in the other sections, and the magnitude of the reflected wave generated therein also changes significantly, The amount of fuel according to the shape can be corrected.

또한, 도 6에 도시한 바와 같이, 상기 전송선(11)이 연료용량이 큰 구간에서 일정한 각도로 경사지게 형성되어, 유면높이에 따라 연료가 침적되는 전송선(11)의 길이가 상이하게 설정됨으로써, 연료가 침적되는 전송선의 길이에 따른 연료량의 그래프에서 선형적인 데이타를 얻을 수 있다.In addition, as shown in FIG. 6, the transmission line 11 is formed to be inclined at a predetermined angle in a section in which the fuel capacity is large, and thus the length of the transmission line 11 in which fuel is deposited is set differently according to the oil level. Linear data can be obtained from a graph of fuel volume along the length of the transmission line.

여기서, 유면높이에 따라 연료가 침적되는 전송선(11)의 길이를 다르게 설정하기 위해, 먼저 절곡된 전송선별 유량 높이에 대한 반사계수를 계산하고, 전송선(11) 길이에 따른 비선형 선로각도를 데이터화하여 전송선(11)의 각도를 설정한다.Here, in order to set the length of the transmission line 11 in which fuel is deposited according to the oil level differently, the reflection coefficient for the flow rate for each bent transmission line is first calculated, and the nonlinear line angles according to the length of the transmission line 11 are converted into data. The angle of the transmission line 11 is set.

이상에서는 본 발명을 특정의 바람직한 실시예에 대하여 도시하고 설명하였으나, 본 발명은 이러한 실시예에 한정되지 않으며, 당해 발명이 속하는 기술분야에서 통상의 지식을 가진 자가 특허청구범위에서 청구하는 본 발명의 기술적 사상을 벗어나지 않는 범위내에서 실시할 수 있는 다양한 형태의 실시예들을 모두 포함한다.While the invention has been shown and described with respect to certain preferred embodiments thereof, the invention is not limited to these embodiments, and has been claimed by those of ordinary skill in the art to which the invention pertains. It includes all the various forms of embodiments that can be carried out without departing from the spirit.

이상에서 본 바와 같이, 본 발명에 따른 차량용 연료게이지에 의하면, 유면높이에 따라 형상이 변하는 연료탱크 내에 구간별로 용량변화에 맞춰 일정한 각도로 절곡되게 형성된 전송선을 설치함으로써, 유면높이에 따라 연료가 침적되는 전송선의 길이를 다르게 설정하고, 연료탱크에 형상변화에 따른 연료량을 보정하여, 실제 차량의 연료량을 보다 정확하게 측정할 수 있다.As described above, according to the fuel gauge for a vehicle according to the present invention, by installing a transmission line bent at a constant angle in accordance with the capacity change for each section in the fuel tank whose shape is changed according to the oil level, the fuel deposited according to the oil level By setting the length of the transmission line to be different, and correcting the fuel amount according to the shape change in the fuel tank, it is possible to measure the fuel amount of the actual vehicle more accurately.

Claims (3)

삭제delete 삭제delete 연료탱크 내부에 수직방향으로 설치된 전송선과, 상기 전송선 상단에 고주파 공급 및 반사파를 측정하도록 설치된 회로부와, 상기 전송선 하단에 부착된 부하저항을 포함하여 구성되고, 상기 전송선에는 서로 다른 각도로 절곡부가 형성되어 유면 높이에 따라 연료가 침적되는 전송선 길이가 다르게 설정되는 차량용 연료게이지에 있어서,A transmission line installed in the fuel tank in a vertical direction, a circuit unit installed on the upper end of the transmission line to measure high frequency supply and reflected waves, and a load resistor attached to the lower end of the transmission line, and the transmission line is bent at different angles. In the fuel gauge for vehicles in which the length of the transmission line in which fuel is deposited is set differently according to the oil level, 상기 전송선은 구간별로 용량 변화에 따라 절곡되는 각도 및 절곡부의 수가 다르게 형성되되, 용량이 큰 구간에서는 절곡되는 각도가 크고 절곡부의 수가 증가하여 유면 높이에 따라 연료가 상기 전송선 사이에 침적되는 길이가 증가하는 것을 특징으로 하는 차량용 연료게이지.The transmission line is formed to be different in the bending angle and the number of the bent portion in accordance with the change in capacity for each section, the length of the bend in the large capacity is large and the number of the bent portion increases the length of fuel deposited between the transmission line according to the oil level Vehicle fuel gauge, characterized in that.
KR1020060075430A 2006-08-10 2006-08-10 Fuel gauge for vehicle KR100802731B1 (en)

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GB2473073A (en) * 2009-09-01 2011-03-02 Hillriver Ltd Fuel level sensing device

Citations (1)

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Publication number Priority date Publication date Assignee Title
JP2008004005A (en) * 2006-06-26 2008-01-10 Matsushita Electric Works Ltd System for transmitting information

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Publication number Priority date Publication date Assignee Title
JP2008004005A (en) * 2006-06-26 2008-01-10 Matsushita Electric Works Ltd System for transmitting information

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2473073A (en) * 2009-09-01 2011-03-02 Hillriver Ltd Fuel level sensing device

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