KR0174846B1 - Method and apparatus for measuring remaining fuel quantity of metal hydrogen cargo vehicle - Google Patents
Method and apparatus for measuring remaining fuel quantity of metal hydrogen cargo vehicle Download PDFInfo
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- KR0174846B1 KR0174846B1 KR1019960065899A KR19960065899A KR0174846B1 KR 0174846 B1 KR0174846 B1 KR 0174846B1 KR 1019960065899 A KR1019960065899 A KR 1019960065899A KR 19960065899 A KR19960065899 A KR 19960065899A KR 0174846 B1 KR0174846 B1 KR 0174846B1
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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
- G01F23/14—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 measurement of pressure
- G01F23/18—Indicating, recording or alarm devices actuated electrically
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0639—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels
- F02D19/0642—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels at least one fuel being gaseous, the other fuels being gaseous or liquid at standard conditions
- F02D19/0644—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels at least one fuel being gaseous, the other fuels being gaseous or liquid at standard conditions the gaseous fuel being hydrogen, ammonia or carbon monoxide
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F13/00—Apparatus for measuring by volume and delivering fluids or fluent solid materials, not provided for in the preceding groups
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- 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
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- Oil, Petroleum & Natural Gas (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
본 발명은 공기량을 감지하는 공기유량센서와 배기가스중의 산소농도를 감지하는 광역산소센서로 수소소비량을 산출한 뒤 잔류 수소량을 연료계기판에 표시하도록 한 금속수소화물차량의 잔류 연료량측정장치 및 그 방법에 관한 것이다.The present invention is a device for measuring the residual fuel amount of a metal hydride vehicle to calculate the hydrogen consumption by the air flow rate sensor for detecting the amount of air and a wide-range oxygen sensor for detecting the oxygen concentration in the exhaust gas and to display the residual hydrogen on the fuel gauge substrate; It's about how.
금속수소화물탱크로 수소연료를 주입하는 차량의 연료주입구뚜껑부에 설치되어 개폐되는 스위치부(1)와, 흡기계통에 장착되어 유입되는 공기량을 측정하는 공기유량센서(2)와, 배기파이프(7)를 통하여 배기되는 배기가스중의 산소농도를 측정하는 광역산소센서(3)와, 스위치부(1)와 각 센서(2)(3)의 신호를 받아서 저장된 수소연료의 충전량과 잔류 수소량을 산출하는 제어부(4)와, 제어부(4)의 신호를 받아 연소실에 수소를 분사하는 수소인젝터(5)와, 제어부(4)의 신호를 받아서 수소의 충전량과 잔류 수소량을 나타내는 연료계기판(6)으로 금속수소화물차량의 잔류 연료량측정장치를 구성하여, 공기량을 감지하는 공기유량센서와 배기가스중의 산소농도를 감지하는 광역산소센서로 수소소비량을 산출한 뒤 잔류 수소량을 연료계기판에 표시할 수가 있는 효과가 있다.A switch unit (1) installed in the fuel inlet lid of the vehicle for injecting hydrogen fuel into the metal hydride tank and opened and closed, an air flow sensor (2) for measuring the amount of air introduced into the intake pipe, and an exhaust pipe ( 7) the oxygen storage sensor 3 for measuring the oxygen concentration in the exhaust gas exhausted through the exhaust gas, and the charge amount and residual hydrogen amount of the stored hydrogen fuel received from the switch unit 1 and the sensors 2 and 3; A fuel gauge substrate for calculating the amount of hydrogen and the amount of residual hydrogen by receiving a signal from the controller 4, a hydrogen injector 5 for injecting hydrogen into the combustion chamber in response to a signal from the controller 4, and a signal from the controller 4; 6) Configure the residual fuel quantity measuring device of the metal hydride vehicle, calculate the hydrogen consumption with the air flow sensor that detects the air volume and the wide-range oxygen sensor that detects the oxygen concentration in the exhaust gas, and then the residual hydrogen amount is Displayable And it is.
Description
본 발명은 공기량을 감지하는 공기유량센서와 배기가스중의 산소농도를 감지하는 광역산소센서로 수소소비량을 산출한 뒤 잔류 수소량을 연료계기판에 표시하도록 한 금속수소화물차량의 잔류 연료량측정장치 및 그 방법에 관한 것이다.The present invention is a device for measuring the residual fuel amount of a metal hydride vehicle to calculate the hydrogen consumption by the air flow rate sensor for detecting the amount of air and a wide-range oxygen sensor for detecting the oxygen concentration in the exhaust gas and to display the residual hydrogen on the fuel gauge substrate; It's about how.
일반적으로 차량에는 연료탱크내의 잔류 연료량을 표시하는 연료계기판이 설치되어 있다.In general, a vehicle is provided with a fuel gauge substrate indicating the amount of fuel remaining in the fuel tank.
그 중에서 액체상의 연료는 그 잔류량을 측정할 수 있어 운전자는 계기판을 보고 현재의 잔류량을 정확하게 확인할 수가 있으며, 또한 수소연료의 엔진의 경우 봄베형의 수소탱크내에 수소를 저장할 때 봄베의 입구에 장착된 게이지를 보고 저장된 연료량과 잔류연료량을 확인할 수가 있다.Among them, the liquid fuel can measure the residual amount, so the driver can check the current level accurately by looking at the instrument panel.In the case of the engine of hydrogen fuel, when the hydrogen is stored in the cylinder type hydrogen tank, The gauge can be used to check the amount of fuel stored and fuel remaining.
그러나 금속수소화물탱크(Metal Hydride Tank)를 장착하는 수소차량의 경우 잔류 연료량을 정확하게 측정할 수 없는 문제점이 있다.However, the hydrogen vehicle equipped with a metal hydride tank (Metal Hydride Tank) has a problem that can not accurately measure the residual fuel amount.
즉, 금속수소화물탱크에 저장되는 수소는 중금속과 분자결합하고 있으며 배기되는 엔진의 냉각수 또는 배기가스에 의해 온도가 상승하면 수소의 방출 압력이 증가하면서 방출되므로 단순히 저장되는 수소량만 측정하여 잔류 수소량을 측정한다는 것은 전혀 불가능하다.That is, the hydrogen stored in the metal hydride tank is molecularly bonded to the heavy metal, and when the temperature rises by the cooling water or exhaust gas of the exhausted engine, the hydrogen is released while the discharge pressure of hydrogen is increased. Measuring small quantities is not possible at all.
본 발명은 이러한 종래의 문제점을 해결하기 위하여, 공기량을 감지하는 공기유량센서와 배기가스중의 산소농도를 감지하는 광역산소센서로 수소소비량을 산출한 뒤 잔류 수소량을 연료계기판에 표시하고자 금속수소화물차량의 잔류 연료량측정장치 및 그 방법을 제공하는 데 그 목적이 있다.In order to solve the above problems, the present invention calculates the hydrogen consumption with an air flow sensor that detects the amount of air and a wide-range oxygen sensor that detects the oxygen concentration in the exhaust gas, and then displays the remaining amount of hydrogen on the fuel gauge substrate. It is an object of the present invention to provide an apparatus and a method for measuring the residual fuel amount of a compact vehicle.
본 발명은 이러한 목적을 달성하기 위한 기술적 수단으로서, 금속수소화물탱크로 수소연료를 주입하는 차량의 연료주입구뚜껑부에 설치되어 개폐되는 스위치부와, 흡기계통에 장착되어 유입되는 공기량을 측정하는 공기유량센서와, 배기파이프를 통하여 배기되는 배기가스중의 산소농도를 측정하는 광역산소센서와, 스위치부와 각 센서의 신호를 받아서 저장된 수소연료의 충전량과 잔류 수소량을 산출하는 제어부와, 제어부의 신호를 받아 연소실에 수소를 분사하는 수소인젝터와, 제어부의 신호를 받아서 수소의 충전량과 잔류 수소량을 나타내는 연료계기판으로 금속수소화물차량의 잔류 연료량측정장치를 구성한 것이 본 발명의 특징이다.The present invention is a technical means for achieving the above object, the switch unit is installed in the fuel inlet cover of the vehicle for injecting hydrogen fuel into the metal hydride tank, and the air to be installed in the intake pipe to measure the amount of air A flow rate sensor, a wide-range oxygen sensor for measuring the oxygen concentration in the exhaust gas exhausted through the exhaust pipe, a control unit for calculating the charge amount and residual hydrogen amount of the stored hydrogen fuel by receiving a signal from the switch unit and each sensor, A characteristic feature of the present invention is to configure a residual fuel amount measuring device for a metal hydride vehicle using a hydrogen injector that receives a signal and injects hydrogen into a combustion chamber and a fuel gauge substrate that receives a signal from a control unit and indicates a charge amount and a residual hydrogen amount.
제어부에 입력된 (1+산소농도(%))/(1-4.773×산소농도(%))의 공식에 배기되는 배기가스중의 산소농도를 적용하여 산출하는 공기와 수소연료의 공연비값과, 설정된 시간마다 소비되는 수소질량을 공기와 수소연료의 공연비값으로 나눈 값을 가지는 수소소비량값과, 설정된 시간마다의 소비수소량값을 적산하여 산출하는 총소비수소량과, 금속수소화물탱크에 저장된 총수소연료량에서 총소비수소량을 제외시킨 값을 연료계기판에 나타내도록 하는 총잔류수소량으로 된 금속수소화물차량의 잔류 연료량측정방법이 본 발명의 특징이다.The air / fuel ratio value of air and hydrogen fuel calculated by applying the oxygen concentration in the exhaust gas to the formula of (1+ oxygen concentration (%)) / (1-4.773 x oxygen concentration (%)) inputted to the control unit; The hydrogen consumption value obtained by dividing the hydrogen mass consumed every set time by the air-fuel ratio value of air and hydrogen fuel, the total consumption hydrogen calculated by integrating the hydrogen consumption value for each set time, and the metal hydride tank The present invention provides a method for measuring the residual fuel amount of a metal hydride vehicle having a total residual amount of hydrogen such that a value excluding the total consumption amount of hydrogen from the total hydrogen fuel amount is displayed on the fuel gauge substrate.
. 도 1은 본 발명의 구성도. 1 is a block diagram of the present invention
※ 도면중 주요부분에 대한 부호의 설명※ Explanation of code for main part of drawing
. 1 : 스위치부 2 : 공기유량센서. 1 switch 2 air flow sensor
. 3 : 광역산소센서 4 : 제어부. 3: wide area oxygen sensor 4: control part
. 5 : 수소인젝터 6 : 연료계기판. 5: hydrogen injector 6: fuel gauge
이하 본 발명을 첨부된 실시예의 도면을 참조하여 상세히 설명하면 다음과 같다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
도 1은 본 발명 금속수소화물차량의 잔류 연료량측정장치를 나타낸 구성도로서, 부호1은 금속수소화물탱크로 수소연료를 주입하는 차량의 연료주입구뚜껑부에 설치되어 개폐되는 스위치부로서, 그 스위치부(1)는 연료주입구부위에 위치되도록 차체와 뚜껑에 각각 접점스위치를 장착하여, 뚜껑의 닫힘시 온되어 제어부(4)에 그 신호를 보낸 뒤 연료계기판(6)에 최대 충전상태로 나타내도록 하며, 뚜껑의 열림시 오프되어 금속수소화물탱크내의 현재 수소잔류량상태를 나타내도록 하거나 완전히 소비된 상태로 나타내도록 한다.1 is a block diagram showing a residual fuel amount measuring device of the metal hydride vehicle of the present invention, reference numeral 1 denotes a switch unit which is installed and opened and closed by a fuel inlet lid of a vehicle injecting hydrogen fuel into a metal hydride tank. The unit 1 is equipped with contact switches on the vehicle body and the lid so as to be located at the fuel inlet part, which is turned on when the lid is closed, and sends a signal to the control unit 4 to display the fuel gauge 6 in the maximum state of charge. It is turned off when the lid is opened to indicate the present hydrogen residual state in the metal hydride tank or as a fully consumed state.
부호2는 흡기계통에 장착되어 유입되는 공기량을 측정하는 공기유량센서로서 기존의 센서를 그대로 이용한다.Reference numeral 2 is an air flow sensor that is installed in the intake cylinder and measures the amount of air flowing in. The existing sensor is used as it is.
부호3은 배기파이프(7)를 통하여 배기되는 배기가스중의 산소농도를 측정하는 광역산소센서로서 이 또한 기존의 센서를 그대로 이용한다.Reference numeral 3 denotes a wide-range oxygen sensor for measuring the oxygen concentration in the exhaust gas exhausted through the exhaust pipe 7 and uses this conventional sensor as it is.
부호4는 스위치부(1)와 각 센서(2)(3)의 신호를 받아서 저장된 수소연료의 충전량과 잔류 수소량을 산출하는 제어부로서, 수소 잔류량의 산출공식을 미리 입력한 뒤 차량의 주행중 공기량, 수소소비량, 산소량등 종합적인 데이타신호를 받아 산출공식에서 적산하도록 하며, 적산된 잔류 수소량값을 연료계기판(6)의 눈금으로 표시되도록 한다.Reference numeral 4 denotes a control unit for calculating the amount of hydrogen fuel charged and the amount of residual hydrogen received by signals from the switch unit 1 and the sensors 2 and 3, and after inputting a formula for calculating the amount of hydrogen remaining in advance, the amount of air during driving of the vehicle. Receive a comprehensive data signal such as hydrogen consumption, oxygen, etc. to be integrated in the calculation formula, and the accumulated residual hydrogen value is displayed on the scale of the fuel gauge substrate 6.
즉, 제어부(4)에 입력된 수소소비량 및 잔류소비량의 산출공식은,That is, the formula for calculating the hydrogen consumption amount and residual consumption amount input to the control unit 4,
mair;공기유량센서(2)로 부터 측정된 현재 공급되는 공기량(kg/s),m air ; the current amount of air supplied from the air flow sensor (2) (kg / s),
A/F;공기와 수소의 공연비, A/F=1+산소농도(%)/1-4.773×산소농도(%),A / F; air-fuel ratio of air and hydrogen, A / F = 1 + oxygen concentration (%) / 1-4.773 X oxygen concentration (%),
mH2;설정된 시간마다 소비되는 수소질량 (kg/s), mH2= mair/A/F,m H2 ; mass of hydrogen consumed per set time (kg / s), m H2 = m air / A / F,
MH2;설정된 시간마다의 소비수소량값을 적산하여 산출하는 총소비수소량,M H2 ; Total hydrogen consumption calculated by integrating the hydrogen consumption value for each set time,
H2;금속수소화물탱크에 충전되어 온도에 의하여 팽창된 총 수소량,H 2 ; the total amount of hydrogen charged in the metal hydride tank and expanded by temperature,
h2;금속수소화물탱크에 충전되어 온도에 의하여 팽창된 잔류 수소량,h 2 ; the amount of residual hydrogen charged in the metal hydride tank and expanded by temperature,
h2= H2- MH2, 이 입력되어 있다. h 2 = H 2 - M H2 , this is entered.
부호5는 제어부(4)의 신호를 받아 연소실에 수소를 분사하는 수소인젝터이다.Reference numeral 5 denotes a hydrogen injector that receives hydrogen from the control unit 4 and injects hydrogen into the combustion chamber.
부호6은 제어부(4)의 신호를 받아서 수소의 충전량과 잔류 수소량을 나타내는 연료계기판이다. 연료계기판(6)은 연료주입구의 뚜껑의 닫힘시 최대 충전상태를 나타내고, 뚜껑의 열림시 잔류량을 나타내거나 완전 소비상태를 나타내도록 한다.Reference numeral 6 denotes a fuel gauge substrate which receives a signal from the control unit 4 and indicates the amount of hydrogen charged and the amount of residual hydrogen. The fuel gauge substrate 6 shows the maximum filling state when the lid of the fuel inlet is closed, and shows the residual amount when the lid is opened or the complete consumption state.
이와같이 구성된 본 발명 금속수소화물차량의 잔류 연료량측정장치에 대하여 설명하면 다음과 같다.The residual fuel amount measuring device of the metal hydride vehicle of the present invention configured as described above will be described below.
금속수소화물탱크에 수소가 배기가스의 온도에 의하여 팽창하게 되면 연료계기판(6)에 충전상태로 현재의 잔류 수소량이 나타나며, 만약 온도가 강하되어 금속수소화물탱크가 냉각되면 연료계기판(6)의 수소 잔류량상태는 최소 충전상태로 나타나게 된다.When hydrogen is expanded in the metal hydride tank by the temperature of the exhaust gas, the remaining amount of hydrogen appears in the state of charge in the fuel gauge substrate 6, and if the temperature is lowered and the metal hydride tank is cooled, the fuel gauge substrate 6 The hydrogen residual state of is shown as the minimum state of charge.
따라서 수소 잔류량의 확인을 위해서는 엔진이 설정된 온도로 가열되어야만 고열의 배기가스에 의하여 금속수소화물탱크를 가열시킬 수가 있고, 금속수소화물탱크의 가열로 인하여 수소와 중금속이 분자결합하여 온도상승에 따라 압력변화가 발생하게 되고 이로인해 연료계기판(6)의 눈금이 정확하게 현재 잔류 수소량을 표시할 수가 있는 것이다.Therefore, in order to check the remaining amount of hydrogen, the engine must be heated to the set temperature to heat the metal hydride tank by the high-temperature exhaust gas, and the hydrogen and heavy metals are molecularly combined due to the heating of the metal hydride tank to increase the pressure. A change occurs, whereby the scale of the fuel gauge substrate 6 can accurately display the current residual hydrogen amount.
한편 콜드스타트시 연료계기판(6)에 현재 수소 잔류량이 나타나지 않더라도 배기파이프를 통하여 배기가스가 배기되고 있고, 공기량도 흡입되고 있으므로 공기유량센서(2)와 광역산소센서(3)에 의하여 공기량과 산소농도를 측정할 수가 있는 것이며, 또한 엔진이 설정된 온도로 상승된 상태에서도 상술한 바와 같은 방법에 의하여 공기량과 산소농도를 계속적으로 측정하면서 연료계기판(6)에 현재 수소 잔류량을 표시하게 된다.On the other hand, even if there is no residual hydrogen present in the fuel gauge 6 at the cold start, the exhaust gas is exhausted through the exhaust pipe, and the air amount is also sucked. The concentration can be measured, and the current hydrogen residual amount is displayed on the fuel gauge substrate 6 while continuously measuring the air amount and oxygen concentration by the above-described method even when the engine is raised to the set temperature.
이때, 수소 잔류량은 표시방법은 수소가 팽창된 상태에서 이론공연비 및 희박공연비로 연소하게 되면 제어부(4)가 스스로 미리 입력된 공식에 현재 공기량과 산소농도 및 시간을 대입하여 적산하게 되며, 적산하여 산출된 잔류 수소량에 대응되는 전압을 발생시켜 종래와 같이 연료계기판(6)을 작동시키게 되므로 연료계기판(6)에는 잔류 수소량을 나타나게 하는 것이다.At this time, the residual amount of hydrogen is displayed in the method of combustion with theoretical and lean fuel ratios in a state where hydrogen is expanded, and the controller 4 integrates the present air amount, oxygen concentration, and time into a formula that is input in advance, and integrates it. Since the fuel gauge substrate 6 is operated by generating a voltage corresponding to the calculated residual hydrogen amount, the residual amount of hydrogen appears in the fuel gauge substrate 6.
그리고 금속수소화물탱크내의 수소량이 소모되었을 경우 그 값이 연료계기판(6)에 표시되므로 운전자는 충전소에서 수소를 충전하게 되는 데, 수소의 충전을 위하여 연료주입구의 뚜껑을 열게 되면 스위치부(1)가 오프되므로 제어부(4)는 수소의 충전준비중임을 판단하게 되고, 연료계기판(6)을 작동시켜 최소눈금을 가리키게 되며, 수소의 충전 후 스위치부(1)의 온과 금속수소화물탱크의 가열로 최대 충전상태를 연료계기판(6)에 나타나게 된다.When the amount of hydrogen in the metal hydride tank is consumed, the value is displayed on the fuel gauge board 6, so that the driver charges hydrogen at the charging station. When the lid of the fuel inlet is opened to charge hydrogen, the switch unit 1 (4) is turned off, so that the control unit 4 determines that the hydrogen is being prepared for charging, and operates the fuel gauge substrate 6 to indicate the minimum division. After the hydrogen is charged, the switch unit 1 is turned on and the metal hydride tank is heated. The maximum state of charge appears on the fuel gauge substrate 6.
이와같이 본 발명은 공기량을 감지하는 공기유량센서와 배기가스중의 산소농도를 감지하는 광역산소센서로 수소소비량을 산출한 뒤 잔류 수소량을 연료계기판에 표시할 수가 있는 효과가 있다.As described above, the present invention has the effect of displaying the residual amount of hydrogen on the fuel substrate after calculating the hydrogen consumption with the air flow rate sensor for detecting the amount of air and the wide-range oxygen sensor for detecting the oxygen concentration in the exhaust gas.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019960065899A KR0174846B1 (en) | 1996-12-14 | 1996-12-14 | Method and apparatus for measuring remaining fuel quantity of metal hydrogen cargo vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019960065899A KR0174846B1 (en) | 1996-12-14 | 1996-12-14 | Method and apparatus for measuring remaining fuel quantity of metal hydrogen cargo vehicle |
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| Publication Number | Publication Date |
|---|---|
| KR19980047408A KR19980047408A (en) | 1998-09-15 |
| KR0174846B1 true KR0174846B1 (en) | 1999-05-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019960065899A KR0174846B1 (en) | 1996-12-14 | 1996-12-14 | Method and apparatus for measuring remaining fuel quantity of metal hydrogen cargo vehicle |
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| Country | Link |
|---|---|
| KR (1) | KR0174846B1 (en) |
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1996
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| KR19980047408A (en) | 1998-09-15 |
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