WO2020111630A1 - Dispositif et procédé de calcul de pression de réservoir de carburant pour véhicule à gaz naturel comprimé - Google Patents

Dispositif et procédé de calcul de pression de réservoir de carburant pour véhicule à gaz naturel comprimé Download PDF

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Publication number
WO2020111630A1
WO2020111630A1 PCT/KR2019/015848 KR2019015848W WO2020111630A1 WO 2020111630 A1 WO2020111630 A1 WO 2020111630A1 KR 2019015848 W KR2019015848 W KR 2019015848W WO 2020111630 A1 WO2020111630 A1 WO 2020111630A1
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Prior art keywords
pressure
fuel
valve
fuel tank
flow rate
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PCT/KR2019/015848
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English (en)
Korean (ko)
Inventor
이민광
오승영
Original Assignee
주식회사 컨트롤웍스
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Publication of WO2020111630A1 publication Critical patent/WO2020111630A1/fr

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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
    • B60K15/077—Fuel tanks with means modifying or controlling distribution or motion of fuel, e.g. to prevent noise, surge, splash or fuel starvation
    • 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
    • B60K15/01—Arrangement of fuel conduits
    • B60K15/013—Arrangement of fuel conduits of gas conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
    • F17C13/025—Special adaptations of indicating, measuring, or monitoring equipment having the pressure as the parameter
    • 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
    • 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
    • B60K2015/03256—Fuel tanks characterised by special valves, the mounting thereof
    • B60K2015/03296—Pressure regulating valves
    • 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
    • B60K2015/03309—Tanks specially adapted for particular fuels
    • 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
    • B60K2015/03328—Arrangements or special measures related to fuel tanks or fuel handling
    • B60K2015/03361—Arrangements or special measures related to fuel tanks or fuel handling for checking the quality or quantity of fuel during filling of fuel tank
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2400/00—Special features of vehicle units
    • B60Y2400/30—Sensors
    • B60Y2400/306—Pressure sensors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/043—Pressure

Definitions

  • Embodiments disclosed herein relates to a fuel tank pressure calculation device and a calculation method for a compressed natural gas vehicle, and more specifically, by calculating the pressure of the fuel tank without the configuration of a pressure sensor that directly measures the pressure of the fuel tank. It relates to a fuel tank pressure calculation device for a compressed natural gas vehicle that can measure the residual amount of fuel.
  • compressed natural gas is a fuel that can replace fuels such as gasoline or diesel, which are conventional fuels. It is used a lot.
  • the amount of fuel is determined by the filling pressure in the fuel tank, and is usually charged at a pressure of about 200 to 300 bar.
  • a general vehicle is equipped with a device capable of measuring the fuel condition in the fuel tank.
  • Korean Patent Nos. 10-0435720 and 10-1998-022008 disclose the pressure signal of a pressure sensor installed in a fuel tank. A technique for estimating and measuring the remaining amount of a fuel tank is disclosed.
  • the above-mentioned background technology is the technical information acquired by the inventor for the derivation of the present invention or acquired in the derivation process of the present invention, and is not necessarily a known technology disclosed to the general public before filing the present invention. .
  • Embodiments disclosed herein can measure the residual amount of fuel by calculating the pressure of the fuel tank through data based on the operating conditions of the engine without the configuration of a pressure sensor that directly measures the pressure of the fuel tank.
  • the purpose of the present invention is to present an apparatus and method for calculating the pressure of a fuel tank for a compressed natural gas vehicle.
  • the embodiments disclosed in this specification are based on the operating condition data of the engine, such as the injection flow rate of the injector or the driving rate of the regulator valve, while interpolating and deriving the pressure value through the pre-stored measurement value, thereby obtaining accurate measurement. It is an object of the present invention to provide a fuel tank pressure calculation device and a calculation method for compressed natural gas vehicles that can omit the configuration of the tank pressure sensor.
  • the pressure of the fuel rail based on the temperature of the fuel can be compensated for more accurate measurement by compressing the pressure of the fuel tank fuel tank vehicle fuel tank pressure
  • the purpose is to present a calculation device and a calculation method.
  • the fuel tank pressure calculating device for a compressed natural gas vehicle includes a fuel tank, a regulator valve, a fuel rail, and an injector.
  • the fuel tank pressure calculating device for calculating the pressure of the fuel tank to measure the comprising: an ECU providing an injection flow rate of the fuel injected from the injector and a driving rate of the regulator valve; A rail pressure sensor for measuring and providing rail pressure of a fuel rail that distributes fuel to the injector; And deriving a valve flow rate of the regulator valve based on the rail pressure measured by the rail pressure sensor and the injection flow rate provided by the ECU, and based on the valve flow rate and the driving rate of the regulator valve provided by the ECU.
  • it may include a fuel amount calculating unit for calculating a primary pressure of fuel flowing into the regulator valve and calculating the pressure of the fuel tank based on the primary pressure.
  • one aspect of the method for calculating the pressure of a fuel tank for a compressed natural gas vehicle includes fuel provided in a compressed natural gas vehicle including a fuel tank, a regulator valve, a fuel rail, and an injector.
  • the fuel tank pressure calculation method that is performed by a tank pressure calculating device and calculates the pressure of the fuel tank to measure the fuel remaining amount of the fuel tank, the injection flow rate of the fuel injected from the injector and the driving of the regulator valve Collecting rates; Collecting rail pressure of a fuel rail that distributes fuel to the injector; Deriving a valve flow rate of the regulator valve based on the rail pressure of the fuel rail and the injector injection flow rate; Deriving a primary pressure of fuel flowing into the regulator valve based on a valve flow rate of the regulator valve and a driving rate of the regulator valve; And calculating the pressure of the fuel tank based on the primary pressure.
  • the residual amount of fuel can be measured by calculating the pressure of the fuel tank through data based on the operating conditions of the engine.
  • Compressed natural gas vehicle fuel tank pressure calculation device and calculation method can be presented.
  • the accurate measurement value by interpolating and deriving the pressure value through the pre-stored measurement value based on the operating condition data of the engine, such as the injection flow rate of the injector or the driving rate of the regulator valve, and constructing the tank pressure sensor. Since it can be omitted, it is possible to present a fuel tank pressure calculation device and a calculation method for a compressed natural gas vehicle that can simplify the configuration and volume of the device.
  • a fuel tank pressure calculation device and a calculation method for a compressed natural gas vehicle that can achieve a more accurate measurement by correcting the measured value of the rail pressure sensor according to the temperature of the fuel are presented. Can be.
  • FIG. 1 is a system diagram showing a fuel tank pressure calculating device for a compressed natural gas vehicle according to an embodiment.
  • FIG. 2 is a configuration diagram showing a fuel tank pressure calculating device for a compressed natural gas vehicle according to an embodiment.
  • FIG. 3 is an exemplary diagram illustrating graphically data for each condition stored in a valve pressure deriving unit of a fuel tank pressure calculating device for a compressed natural gas vehicle according to an embodiment.
  • FIG. 4 is a configuration diagram showing a valve pressure lead portion shown in FIG. 2.
  • FIG. 5 is a flow chart showing a method for calculating the pressure of a fuel tank for a compressed natural gas vehicle according to an embodiment.
  • FIG. 1 is a system diagram showing a fuel tank pressure calculating device for a compressed natural gas vehicle according to an embodiment
  • FIG. 2 is a configuration diagram showing a fuel tank pressure calculating device for a compressed natural gas vehicle according to an embodiment
  • FIG. 3 is one embodiment It is an exemplary diagram illustrating graphically data for each condition stored in a valve pressure deriving unit of a fuel tank pressure calculating device for a compressed natural gas vehicle according to an example.
  • Figure 5 is a flow chart showing a fuel tank pressure calculation method for a compressed natural gas vehicle according to an embodiment.
  • Compressed natural gas vehicle fuel tank pressure calculation device is applied to a vehicle using compressed natural gas (CNS) as fuel, and fuel for measuring the remaining amount of a fuel tank in which compressed natural gas is stored It is a device that can calculate the pressure of the tank without the tank pressure sensor.
  • CNS compressed natural gas
  • the fuel tank pressure calculation device for a compressed natural gas vehicle is compressed, including a fuel tank 1, a regulator valve 2, a fuel rail 3, and an injector 4 as shown in FIG. It can be applied to natural gas vehicles.
  • the fuel tank 1 is a component in which the compressed natural gas is filled at a set pressure, and the compressed natural gas may be filled at a pressure of 200 to 300 bar.
  • the regulator valve 2 is a component that supplies fuel discharged from the fuel tank 1 to the engine at a uniform flow rate and pressure.
  • the regulator valve 2 can supply fuel while being opened and closed by the control of the ECU 100 of the vehicle.
  • the fuel rail 3 is a component that distributes the fuel supplied from the regulator valve 2 to the injector 4, and the injector 4 operates under the control of the ECU 100 of the vehicle while the fuel rail 3 is operated. It is a component that injects fuel into the engine.
  • the fuel tank pressure calculating device for a compressed natural gas vehicle may form a compressed natural gas vehicle together with the above components, and form a separate independent module to the fuel supply line of the compressed natural gas vehicle. It may be installed.
  • the fuel tank pressure calculating device for a compressed natural gas vehicle may include an ECU 100, a rail pressure sensor 200, and a fuel amount calculating unit 10 as shown in FIG. 1.
  • the ECU 100 is an electronic control unit and is a conventional computer that controls a vehicle. As is known, the ECU 100 can control the flow rate of fuel, ignition timing, engine rotation speed, and valve timing.
  • the ECU 100 is applied to the fuel tank pressure calculating device for a compressed natural gas vehicle according to an embodiment, and the injection flow rate injected from the injector 4 and the driving rate of the regulator valve 2, that is, the operating conditions of the engine Accordingly, the degree to which the regulator valve 2 is opened can be provided.
  • the ECU 100 may calculate and provide the injection flow rate of the injector 4 and the driving rate of the regulator valve 2 through a set program, or may be provided by sensing through a detection signal of a separate detection sensor. .
  • the ECU 100 can measure the injection flow rate of the injector 4 and the driving rate of the regulator valve 2 on the same time, and unlike this, the injection flow rate of the injector 4 and the driving rate of the regulator valve 2 Each can be measured as the average value of the values collected over a period of time.
  • the rail pressure sensor 200 is a component that measures and applies the rail pressure of the fuel rail 3 described above.
  • the rail pressure sensor 200 can measure the rail pressure of the fuel rail 3 at the same time as the injection flow rate of the injector 4 by the ECU 100 and the driving rate of the regulator valve 2, unlike this It can also be measured as the average value of the values collected over a set period of time.
  • the fuel amount calculating unit 10 derives the valve flow rate of the regulator valve 2 based on the rail pressure measured by the rail pressure sensor 200 and the injection flow rate provided by the ECU 100, and the derived valve flow rate and ECU
  • the pressure of the fuel tank 1 is calculated based on the calculated primary pressure by calculating the primary pressure of the fuel flowing into the regulator valve 2 based on the driving rate of the regulator valve 2 provided in (100). Component.
  • the fuel amount calculating unit 10 may be mounted on the ECU 100 described above in a program form, or alternatively, may be mounted on a separate substrate and installed on a vehicle fuel supply line.
  • the fuel amount calculating unit 10 may calculate the pressure of the fuel tank 1 when the engine state of the compressed natural gas vehicle is in a normal state, and the calculated ECU 100 of the pressure of the fuel tank 1 is described above. However, the pressure calculated by applying the fuel gauge of a vehicle instrument panel, not shown, may be displayed as a residual amount that can be recognized by the user.
  • the fuel amount calculating unit 10 may be configured to include a valve flow rate guiding part 300, a valve pressure guiding part 400 and a tank pressure calculating part 500.
  • the valve flow rate deriving part 300 is a component that derives a flow rate of fuel supplied from the regulator valve 2 described above.
  • the valve flow rate introduction part 300 includes the rail pressure P1 of the fuel rail 3 measured by the rail pressure sensor 200 and the injection flow rate Q1 of the injector 4 provided by the ECU 100. Based on the can calculate the valve flow rate (Q2) of the regulator valve (2).
  • valve flow rate deriving unit 300 may calculate the valve flow rate Q2 of the regulator valve 2 through Equation 1 below.
  • P1 rail pressure of the fuel rail 3
  • Q1 injection flow rate of the injector 4
  • Q2 valve flow rate of the regulator valve 2
  • ⁇ elastic modulus
  • V volume of the fuel rail 3.
  • a rail temperature sensor 600 may be installed on the fuel rail 3 as shown in FIG. 1.
  • the rail temperature sensor 600 may measure the fuel temperature of the fuel rail 3 and provide it to the valve flow rate deriving unit 300 described above.
  • the higher the temperature of the fuel, the higher the pressure, and the measured value of the rail pressure sensor 200 may be measured higher than the actual fuel pressure.
  • the rail temperature sensor 600 is a component for correcting an error as the pressure of the fuel increases with the temperature of the fuel.
  • valve flow rate deriving unit 300 in deriving the valve flow rate Q2 of the regulator valve 2, the rail pressure sensor 200 based on the temperature of the fuel measured by the rail temperature sensor 600 After correcting the rail pressure (P1) of the fuel measured in can be derived the valve flow rate (Q2).
  • the valve pressure introduction unit 400 is a component that derives the primary pressure of fuel flowing from the fuel tank 1 into the regulator valve 2.
  • the valve pressure deriving unit 400 includes the valve flow rate Q2 of the regulator valve 2 derived from the aforementioned valve flow deriving unit 300 and the regulator valve 2 provided by the ECU.
  • the primary pressure P2 of the regulator valve 2 can be derived based on the driving rate C.
  • valve pressure leading part 400 may include a valve characteristic data part 410 and an interpolation leading part 420 as shown in FIG. 4.
  • the valve characteristic data unit 410 is a component that stores valve characteristic data indicating a relationship between a valve flow rate Q2 and a driving rate C for the regulator valve 2 for a plurality of different primary pressure condition values.
  • valve characteristic data unit 410 correlates the valve flow rate Q2 and the driving rate C under the conditions that the primary pressure of the regulator valve 2 is 300 bar, 250 bar, 200 bar, and 100 bar. Relationships can be stored as data.
  • the valve characteristic data unit 410 may be applied with an artificial intelligence module such as machine learning to store the valve flow rate Q2 and the driving rate C according to the primary pressure condition value.
  • an artificial intelligence module such as machine learning to store the valve flow rate Q2 and the driving rate C according to the primary pressure condition value.
  • the interpolation lead-out unit 420 is a component that derives the primary pressure P2 of the regulator valve 2 based on the condition values stored in the aforementioned valve characteristic data unit 410.
  • the interpolation lead section 420 includes a valve flow rate Q2 of the regulator valve 2 derived from the valve flow guide section 300, a driving rate C of the regulator valve 2 provided by the ECU, and valve characteristics Based on the condition values stored in the data portion 410, a primary pressure value corresponding to the measured values of the valve flow rate Q2 and the drive rate C can be derived, and the conditions pre-stored in the valve characteristic data portion 410 The primary pressure P2 can be derived while interpolating through the values.
  • the tank pressure calculating part 500 is a component for calculating the pressure of the fuel tank 1 based on the primary pressure P2 of the regulator valve 2 derived from the valve pressure extracting part 400.
  • the tank pressure calculating unit 500 may be calculated by applying a correction value of the fuel pipe 1a to the primary pressure P2 of the regulator valve 2 derived from the valve pressure extracting unit 400.
  • the tank pressure calculating unit 500 is a primary side of the regulator valve 2 with a correction value having different characteristics according to the length or diameter of the fuel pipe 1a connecting the fuel tank 1 and the regulator valve 2 By applying to the pressure P2, the pressure of the fuel tank 1 can be calculated.
  • the ECU 100 constituting the fuel tank pressure calculating device for the compressed natural gas vehicle determines whether the state of the engine of the compressed natural gas vehicle is maintained in a normal state, and in the normal state, determines the pressure of the fuel tank 1. Calculate (S10).
  • the ECU 100 detects and provides the injection flow rate Q1 of the injector 4 and the driving rate C of the regulator valve 2 (S100).
  • the rail pressure sensor 200 measures and provides the rail pressure P1 of the fuel rail 3 (S200).
  • the valve flow rate deriving unit 300 calculates the flow rate Q2 of the regulator valve 2 by applying the injection flow rate Q1 and the rail pressure P1 to [Equation 1] (S300).
  • the valve pressure introduction unit 400 calculates the primary pressure P2 of the regulator valve 2 through the flow rate Q2 of the regulator valve 2 and the driving rate C of the regulator valve 2 (S400). .
  • valve pressure deriving unit 400 stores the valve flow rate Q2 and the driving rate C according to the primary pressure condition value in the valve characteristic data unit 410 (S410), and the interpolation introducing unit 420 Based on the data stored in the valve characteristic data unit 410, the primary pressure P2 of the regulator valve 2 is derived (S420).
  • the interpolation lead-out section 420 provides valve flow rate Q2 of the regulator valve 2 derived from the valve flow rate guide section 300 and the driving rate C of the regulator valve 2 provided from the ECU. While deriving the pressure values corresponding to the measured valve flow rate (Q2) and drive rate (C) by applying to the unit 410, interpolating through the pre-stored condition values in the valve characteristic data unit 410, the primary pressure (P2) Can be derived.
  • the tank pressure calculating unit 500 applies the correction value of the fuel pipe 1a to the primary pressure P2 of the regulator valve 2 derived from the valve pressure extracting unit 400 to apply the pressure of the fuel tank 1.
  • the pressure of the fuel tank 1 calculated as described above may be displayed as a residual amount corresponding to the calculated pressure while being applied to the fuel gauge of a vehicle instrument panel not shown.
  • the fuel tank pressure calculation device and calculation method for a compressed natural gas vehicle include an engine such as an injection flow rate Q1 of the injector 4 or a driving rate C of the regulator valve 2. It is possible to calculate the accurate measurement value by interpolating and deriving the pressure value (P2) of the regulator valve (2) through the pre-stored measurement value based on the operating condition data of the device, since the configuration of the tank pressure sensor can be omitted. Its configuration and volume can be simplified.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
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  • General Engineering & Computer Science (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
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Abstract

La présente invention concerne un dispositif pour calculer la pression d'un réservoir de carburant, afin de mesurer la quantité de carburant restant dans le réservoir de carburant d'un véhicule à gaz naturel comprimé comprenant le réservoir de carburant, un clapet de régulation, un rail à carburant, et un injecteur, le dispositif comprenant : une ECU pour fournir un débit d'injection d'un carburant injecté depuis l'injecteur, et une vitesse de fonctionnement du clapet de régulation; un capteur de pression de rail pour mesurer et fournir une pression du rail à carburant afin de distribuer le carburant dans l'injecteur; et une unité de calcul de quantité de carburant qui dérive un débit du clapet de régulation sur la base de la pression du rail mesurée par le capteur de pression de rail et du débit d'injection fourni par l'ECU, et qui calcule, sur la base du débit du clapet et de la vitesse de fonctionnement du clapet de régulation fournis par l'ECU, une pression côté primaire du carburant introduit dans le clapet de régulation, et qui calcule la pression du réservoir de carburant sur la base de la pression côté primaire.
PCT/KR2019/015848 2018-11-30 2019-11-19 Dispositif et procédé de calcul de pression de réservoir de carburant pour véhicule à gaz naturel comprimé WO2020111630A1 (fr)

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KR1020180151632A KR102114830B1 (ko) 2018-11-30 2018-11-30 압축천연가스 차량용 연료탱크 압력 산출장치 및 산출방법

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KR970061415U (ko) * 1996-05-07 1997-12-10 기아자동차주식회사 천연가스 차량의 연료 게이지장치
KR19980051947A (ko) * 1996-12-24 1998-09-25 김영귀 압축천연가스 차량의 연료측정 시스템
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