WO2008076453A1 - Systèmes de détection de composition de carburant et procédés utilisant la propagation d'ondes en fréquences em - Google Patents

Systèmes de détection de composition de carburant et procédés utilisant la propagation d'ondes en fréquences em Download PDF

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Publication number
WO2008076453A1
WO2008076453A1 PCT/US2007/025979 US2007025979W WO2008076453A1 WO 2008076453 A1 WO2008076453 A1 WO 2008076453A1 US 2007025979 W US2007025979 W US 2007025979W WO 2008076453 A1 WO2008076453 A1 WO 2008076453A1
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WO
WIPO (PCT)
Prior art keywords
fuel
resonant circuit
space
liquid
resonant
Prior art date
Application number
PCT/US2007/025979
Other languages
English (en)
Inventor
Idir Boudaoud
Adrian Page
Alan Mccall
Original Assignee
Schrader Electronics Ltd.
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
Priority claimed from US11/800,965 external-priority patent/US8482298B2/en
Application filed by Schrader Electronics Ltd. filed Critical Schrader Electronics Ltd.
Priority to JP2009542905A priority Critical patent/JP2010513926A/ja
Priority to MX2009006440A priority patent/MX2009006440A/es
Priority to BRPI0720456-6A priority patent/BRPI0720456A2/pt
Priority to CA002672845A priority patent/CA2672845A1/fr
Priority to EP07863138A priority patent/EP2122142A1/fr
Priority to AU2007334349A priority patent/AU2007334349B2/en
Publication of WO2008076453A1 publication Critical patent/WO2008076453A1/fr

Links

Classifications

    • 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
    • F02D19/08—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 simultaneously using pluralities of fuels
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
    • G01N27/221—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance by investigating the dielectric properties
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D45/00—Electrical control not provided for in groups F02D41/00 - F02D43/00
    • 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
    • G01F23/263—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 by measuring variations in capacitance of capacitors
    • G01F23/266—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 by measuring variations in capacitance of capacitors measuring circuits therefor
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/26—Oils; Viscous liquids; Paints; Inks
    • G01N33/28—Oils, i.e. hydrocarbon liquids
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/26—Oils; Viscous liquids; Paints; Inks
    • G01N33/28—Oils, i.e. hydrocarbon liquids
    • G01N33/2835—Specific substances contained in the oils or fuels
    • G01N33/2852—Alcohol in fuels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/06—Fuel or fuel supply system parameters
    • F02D2200/0611—Fuel type, fuel composition or fuel quality

Definitions

  • TITLE FUEL COMPOSITION SENSING SYSTEMS AND METHODS USING EMF WAVE PROPAGATION
  • This invention relates generally to systems and methods for sensing types of liquids passing through a line or stored in fuel tanks and other containers. More particularly, the present invention relates to sensing the constituents of fuel in a Flexible Fuel Vehicle by propagating electromagnetic waves into a liquid container or fuel line. Particular embodiments of the present invention detect fuel composition and alcohol content in a fuel line of a Flex Fuel Vehicle.
  • Flex Fuel Vehicles are motor vehicles which are compatible with the use of alcohol as a significant constituent of the vehicle's fuel.
  • Alcohol based fuels are an alternative type of renewable, transportation fuel made from bio-material, potentially reducing dependence on petroleum based fuels. A motorist may advantageously gain increased horsepower for better engine performance because alcohol based fuels typically have a higher octane rating than premium gasoline.
  • Alcohol based fuels include "E85,” a term for motor fuel blends of 85 percent ethanol and 15 percent gasoline.
  • E85 is an alternative fuel as defined by the U.S. Department of Energy and is intended for use in FFVs. Ethanol and other alcohols burn cleaner than gasoline and is a renewable, domestic, environmentally friendly fuel.
  • FFVs can typically be fueled on any blend of ethanol and gasoline, from 0% ethanol and 100% gasoline up to 85% ethanol and 15% gasoline (E85).
  • EMS Engine Management System
  • the prior art fails to provide a reliable, inexpensive, and accurate system and method of measuring the composition of fuel in a motor vehicle using a system that can be installed external to a fuel line, fuel tank, or the like.
  • the present invention is directed to systems and methods which accurately measure the composition of fuel in a motor vehicle and more specifically the alcohol content of fuel in a motor vehicle, particularly ethanol, by means of a non-intrusive fuel composition sensor.
  • embodiments of the present invention may be used in FFVs to detect the percentage of ethanol content in the fuel.
  • This information can be constantly reported to the EMS or Body Control Module of the FFV, allowing the EMS to respond accordingly, thereby promoting performance, efficiency and/or the like.
  • the present invention provides immediate accurate ethanol content information without any direct contact with fuel, minimizing emissions, risk of fuel leak, risk of major car breakdown failure, and/or the like.
  • a flex fuel sensor may be deployed in conjunction with the fuel transfer line (e.g. disposed around a plastic fuel line), at the bottom or side of a fuel tank, or otherwise disposed proximate to the fuel.
  • the fuel transfer line e.g. disposed around a plastic fuel line
  • a resonant circuit is resonated at a resonant frequency, an inductor of the resonant circuit is positioned proximate to liquid in a space and a capacitor of the resonant circuit is positioned proximate to the liquid in the space.
  • a change in an electrical parameter associated with the resonant circuit caused by a variation in at least one property of the liquid is measured.
  • a flex fuel sensor of the present invention may comprise a resonant circuit, with a capacitor of the resonant circuit comprising plates disposed adjacent to a fuel space and an inductor disposed adjacent to the fuel space, whereby the fuel acts as a dielectric in the capacitor in a manner proportionate to the constituents of the fuel.
  • the space may be a liquid transmission line, a storage tank, or the like, as discussed above.
  • the capacitor of the resonant circuit might comprise a plurality of plates placed on either side of the liquid transmission line, or spaced apart semi-cylindrical conductive plates disposed about the liquid transmission line.
  • a signal of a constant frequency may be generated across a resonant circuit, which comprises an inductor and a PCB trace capacitor, capacitor plates, or the like.
  • Electromagnetic radiation may be propagated into the fuel, such as the passing fuel in a fuel transfer pipe.
  • the conductivity and dielectric properties of the fuel may impact upon the electromagnetic field and may change the capacitance of the capacitor, the trace capacitor, the capacitor plates or other such capacitive device or devices which comprise the resonant circuit.
  • Such changes may be proportional to the constituents of the fuel and may, for example be representative of the alcohol/ethanol content in the fuel.
  • Such changes may be detected by a microcontroller, or the like, and may be communicated to a second microcontroller, to the EMS, to a device external to the flex fuel sensor, and/or other device.
  • Such communications may be asynchronous or may be synchronized to an external device, and may be triggered by a signal from an external device, and/or the like.
  • the present invention provides a non-invasive, cost effective solution, well suited, not only for original equipment applications but also for up-fit or retro-fit or the like.
  • the present systems and methods are highly responsive and provide immediate information to, an EMS or similar device, allowing quick and accurate adjustments to be made which may facilitate improvement and/or maintenance of vehicle performance.
  • a substantially sinusoidal RF signal of a constant frequency may be generated and coupled to a resonant LCR (inductance-capacitance-resistance) circuit.
  • a parallel resonant circuit may be employed.
  • An inductor such as for example a coil of the resonant circuit, may be placed proximate a fuel line, fuel tank or the like, causing electromagnetic radiation to propagate into the fuel space.
  • a capacitor of the resonant circuit may be placed around, adjacent to or otherwise disposed proximate to a fuel line, fuel tank or the like, causing electromagnetic radiation to propagate into the fuel space.
  • the liquid fuel inside the line or tank acts as an electrical load to the resonant circuit in a manner proportionate to the constituents of the fuel.
  • the loading effect of the fuel may cause a shift in the resonant frequency of the circuit and/or a change in the Q (quality factor) of the resonant circuit.
  • the loading effect of the fuel is determined by monitoring a change in one or more electrical parameters associated with the excited resonant circuit. For example, the voltage across the resistor in the resonant circuit can be monitored. Changes in this voltage are detected and analyzed by a system controller, the result of which is used to output a signal indicative of fuel composition.
  • measurements may be taken from the capacitor/capacitors and/or the inductor/inductors comprising the resonant circuit as impacted by the loading effect of the fuel on the resonant circuit and/or the electromagnetic field.
  • Such an impact may for example be detected by measuring an amplitude change in the frequency signal of the resonant circuit, a change in the resonant frequency of the resonant circuit and/or the like.
  • measurements may take the form of a digital and/or analogue, electrical, and/or magnetic signals.
  • the present systems and methods can sense and measure the composition of liquid in other transmission lines and/or containers and are not limited to the examples used in this description.
  • the system can be used in a wide variety of scientific, consumer, industrial, and medical environments, as well as in vehicles as discussed herein.
  • the present systems and methods may employ auto-calibration hardware and software that enables a flex fuel sensor of the present invention to determine an optimum system operating frequency.
  • the optimum system operating frequency is selected to be a frequency above or below the resonant frequency of the resonant LCR circuit. The choice of this operating frequency over the resonant frequency may allow for larger changes in voltage drop as impacted by changes in liquid composition.
  • the system of such embodiments is tuned to operate at a frequency between a lower and upper value.
  • auto-compensation is provided to help ensure that the measured electrical parameter provides an accurate indication of the liquid composition in the fuel line, fuel tank, fuel container, or the like, independent of variations in operating conditions, such as variations in ambient temperature, humidity, pressure and/or the like.
  • the present systems and methods may provide an EMS or other engine control device dynamic, accurate fuel composition information regardless of the fuel storage system employed and ongoing mixing of fuel in saddle tanks or similar storage arrangements.
  • Embodiments of the present invention may include a physical or wireless data interface to facilitate external communication or transmission of raw data measurements, encoded measurements, compensated measurements, and/or the like from a flex fuel sensor to a central controller in the vehicle. Such information may be communicated: periodically; in response to a change; by request from the central controller; by request from an external device such as a diagnostic device; and/or in other manners.
  • a physical or wireless data interface to facilitate external communication or transmission of raw data measurements, encoded measurements, compensated measurements, and/or the like from a flex fuel sensor to a central controller in the vehicle. Such information may be communicated: periodically; in response to a change; by request from the central controller; by request from an external device such as a diagnostic device; and/or in other manners.
  • FIGURE 1 is a perspective view of an embodiment of a flex fuel sensor of the present invention deployed in conjunction with a fuel line;
  • FIGURE 2 is an exploded perspective view of the flex fuel sensor of Figure i;
  • FIGURE 3 is a rear side perspective view (relative to the perspective of Figures 1 and 2) of the PCB and capacitor plates of the flex fuel sensor of Figure 1;
  • FIGURE 4 is an exploded perspective view of another embodiment of a flex fuel sensor of the present invention, showing the PCB and semi-cylindrical capacitors.
  • Figures 1 and 2 show an embodiment of flex fuel sensor 100 of the present invention disposed in conjunction with fuel line 102, such as mounting flex fuel sensor housing 115 to base plate 117, encompassing fuel line 102.
  • Alternative embodiments call for mounting a flex fuel sensor of the present invention to the side or bottom of a fuel tank.
  • fuel line 102 or the aforementioned fuel tank is comprised of a non- conductive material such as plastic.
  • FIG. 3 illustrates an embodiment of PCB 105 and capacitor plates 110 and 112 of flex fuel sensor 100.
  • Embodiments of flex fuel sensor 100 house PCB 105 in housing 115.
  • PCB 105 may mount and/or define a controller, the controller including an RF generator and an analog-to-digital converter (ADC).
  • PCB 105 might also include an antenna driver having output terminals, and input terminals, coupled to the RF generator and a resonant circuit coupled to the antenna driver and having an inductor positioned proximate a liquid in a container or fuel transmission line 102.
  • ADC analog-to-digital converter
  • a flex fuel sensor of the present invention may comprise a resonant circuit, with a capacitor of the resonant circuit comprising plates disposed adjacent to a fuel space and an inductor disposed adjacent to the fuel space, whereby the fuel acts as a dielectric in the capacitor in a manner proportionate to the constituents of the fuel.
  • a capacitor of an LCR circuit takes the form of a plurality of capacitor plates (110, 112).
  • an inductor of the resonant circuit By placing an inductor of the resonant circuit in close proximity to a fuel line, electromagnetic radiation may be propagated into a fuel space defined within the line.
  • fuel in the line acts as an electrical load to the resonant circuit in a manner proportionate to the constituents of the fuel in the line.
  • the conductivity and dielectric properties of the fuel change the capacitance of the trace capacitor/capacitor plates 110 and/or 112.
  • a capacitor of an LCR circuit takes the form of a plurality of semi-cylindrical shaped capacitors 410, 420 and 430 of flex fuel sensor 100.
  • This embodiment of the present invention may employ two semi- cylindrical capacitors giving a capacitive effect, or alternatively may have additional capacitors such as illustrated in order to increase the capacitance in the resonant circuit.
  • Such semi-cylindrical shaped capacitors may fit into molded housing 440 and may be fixed around the fuel line using a sealing material such as for example a thermo plastic elastomer seal or other appropriate sealing material to adequately prevent contaminants and/or air between flex fuel sensor 100 and fuel line 102.
  • the present invention measures properties of a liquid, such as engine fuel. These properties are preferably electrical properties and a measured change in the electrical parameter of the liquid is a function of a variation in the electrical property of the liquid. Where the liquid is a fuel, the variation in electrical property may be a function of fuel composition. Measurements of electrical properties may include measuring a change in voltage at the resonant circuit and/or measuring a change in the resonant frequency of the resonant circuit.
  • a resonant circuit is resonated at a resonant frequency, an inductor of the resonant circuit is positioned proximate to liquid in a space and a capacitor of the resonant circuit is positioned proximate to the liquid in the space.
  • a change in an electrical parameter associated with the resonant circuit caused by a variation in at least one property of the liquid is measured.
  • the aforementioned RF generator generates an RF signal at an operating frequency of the resonant circuit and the antenna circuit is electrically coupled to the RF generator.
  • the resonant circuit preferably has a frequency response curve centered around a resonant frequency.
  • the controller may be operatively connected to the RF generator and to the antenna circuit and may be functional to cause the operating frequency of the RF generator to be proximate to the resonant frequency of the resonant circuit, and to measure a change in an electrical parameter associated with the resonant circuit as may be impacted by changes in for example the concentration of alcohol in the liquid passing through fuel line 102 or stored in the fuel tank or fuel container.
  • changes in the properties of the fuel such as for example changes in the dielectric properties of the fuel, the conductivity of the fuel, and/or the like, which may result from changes in the constituents of the fuel, may manifest as changes in the resonant frequency and/or properties of the resonant circuit.
  • Such a change may be detected by sweeping between a first frequency and a second frequency to detect the new resonant frequency of the resonant circuit.
  • changes in the properties of the fuel may manifest as changes to the amplitude of the resonant frequency signal of the resonant circuit.
  • the controller or similar circuitry of sensor 100 is preferably functional to monitor and/or communicate the measured change in the electrical parameter, such as via conductors 125 of sensor electrical connector 130.
  • the controller may be further functional to convert the measured change in the electrical parameter to an alcohol concentration signal and to communicate the alcohol concentration signal to a flex fuel vehicle engine management system EMS, an external receiving device or the like.
  • the present invention allows for calibrating the operating frequency of the RF signal to compensate for physical and/or electrical properties of the respective fuel line or container.
  • This calibration may be carried out automatically.
  • Such calibration might include adjusting the operating frequency of the RF signal so that an alcohol concentration sensing window is defined on a substantially linear part of a frequency response curve proximate the resonant frequency of the resonant circuit.
  • the resonant circuit may be a series resonant circuit
  • the controller may be a calibration module operative to cause the operating frequency of the RF generator to be on a substantially linear portion of the frequency response curve above the resonant frequency.
  • calibrating the operating frequency might include sweeping the operating frequency of the RF signal in a range between a first frequency and a second frequency and measuring a parameter of the resonant circuit as the frequency of the RF signal is swept.
  • the controller might include a compensation module functional to adjust the alcohol concentration signal for changes in ambient temperature.
  • a change in voltage at the resonant circuit and/or a shift in the resonant frequency of the resonant circuit may be measured.
  • the measurement may be carried out by sweeping between a first frequency and a second frequency to identify a resonant frequency of the resonant circuit.
  • the resonant frequency of the resonate circuit may be compensated for physical and/or electrical properties of a respective fuel line or container defining the space. This calibration may take place automatically. For example, calibration may be carried out by sweeping between a pair of frequencies to identify a resonant frequency of the resonant circuit as impacted by the space alone.
  • the measurement may be made by sweeping between a different, or the same, pair of frequencies to identify a resonant frequency of the resonant circuit as changed by the liquid in the space.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
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  • Chemical Kinetics & Catalysis (AREA)
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  • General Health & Medical Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Electrochemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Combustion & Propulsion (AREA)
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  • Electromagnetism (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)

Abstract

Selon l'invention, un capteur poly-carburant est déployé conjointement avec la canalisation de transfert de carburant (par exemple autour d'une canalisation de carburant en matière plastique) ou sur le côté inférieur d'un réservoir de carburant. Un signal HF de fréquence constante peut être généré au travers d'un circuit résonnant qui est constitué d'une bobine d'inductance et d'un condensateur en pistes imprimées sur une carte, de plaques de condensateur, de plaques de condensateur semi cylindriques ou autres. Le rayonnement électromagnétique se propage dans le carburant traversant le tuyau de transfert. La conductivité et les propriétés diélectriques du carburant modifient la capacité du condensateur en pistes imprimées/des plaques de condensateur. Ces modifications sont proportionnelles à la teneur en éthanol/en alcool du carburant et sont de préférence détectées par un microcontrôleur ou autre puis transmises au système de gestion du moteur thermique du véhicule poly-carburant.
PCT/US2007/025979 2006-12-18 2007-12-18 Systèmes de détection de composition de carburant et procédés utilisant la propagation d'ondes en fréquences em WO2008076453A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP2009542905A JP2010513926A (ja) 2006-12-18 2007-12-18 燃料組成検出システムおよびｅｍｆ波の伝播を利用した方法
MX2009006440A MX2009006440A (es) 2006-12-18 2007-12-18 Sistemas y métodos para detectar la composición de combustible usando propagación de ondas electromagnéticas de campo.
BRPI0720456-6A BRPI0720456A2 (pt) 2006-12-18 2007-12-18 Sistemas e métodos para detectar composição de combustível utilizando propagação de onda emf
CA002672845A CA2672845A1 (fr) 2006-12-18 2007-12-18 Systemes de detection de composition de carburant et procedes utilisant la propagation d'ondes en frequences em
EP07863138A EP2122142A1 (fr) 2006-12-18 2007-12-18 Systèmes de détection de composition de carburant et procédés utilisant la propagation d'ondes en fréquences em
AU2007334349A AU2007334349B2 (en) 2006-12-18 2007-12-18 Fuel composition sensing systems and methods using EMF wave propagation

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US87543906P 2006-12-18 2006-12-18
US60/875,439 2006-12-18
US11/800,965 US8482298B2 (en) 2006-12-18 2007-05-08 Liquid level and composition sensing systems and methods using EMF wave propagation
US11/800,965 2007-05-08

Publications (1)

Publication Number Publication Date
WO2008076453A1 true WO2008076453A1 (fr) 2008-06-26

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Country Status (8)

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EP (1) EP2122142A1 (fr)
JP (1) JP2010513926A (fr)
KR (1) KR101083908B1 (fr)
AU (1) AU2007334349B2 (fr)
BR (1) BRPI0720456A2 (fr)
CA (1) CA2672845A1 (fr)
MX (1) MX2009006440A (fr)
WO (1) WO2008076453A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011038003A1 (fr) 2009-09-22 2011-03-31 Adem Systèmes et procédés de détection d'impédance destinés à mesurer des constituants dans des objets solides et liquides
WO2012037974A1 (fr) 2010-09-22 2012-03-29 Delaval Holding Ab Détermination de caractéristiques de substances liquides
WO2012105897A1 (fr) 2011-02-02 2012-08-09 Delaval Holding Ab Unité de surveillance électromagnétique pour substance liquide
US8482298B2 (en) 2006-12-18 2013-07-09 Schrader Electronics Ltd. Liquid level and composition sensing systems and methods using EMF wave propagation
US8952708B2 (en) 2011-12-02 2015-02-10 Neovision Llc Impedance resonance sensor for real time monitoring of different processes and methods of using same
WO2016137343A1 (fr) 2015-02-23 2016-09-01 Alsemix Sp. Z O.O. Procédé de détermination de la teneur en éthanol d'un carburant pour moteurs à combustion interne
US9465089B2 (en) 2011-12-01 2016-10-11 Neovision Llc NMR spectroscopy device based on resonance type impedance (IR) sensor and method of NMR spectra acquisition
US9528814B2 (en) 2011-05-19 2016-12-27 NeoVision, LLC Apparatus and method of using impedance resonance sensor for thickness measurement

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KR102552022B1 (ko) * 2018-09-21 2023-07-05 현대자동차 주식회사 자동차용 rf 센서 장치 및 이를 이용한 연료 성분 분석 방법
KR102633861B1 (ko) * 2018-10-16 2024-02-05 현대자동차 주식회사 자동차용 rf 센서 장치를 이용한 연료 성분 분석 시스템

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CA2672845A1 (fr) 2008-06-26
JP2010513926A (ja) 2010-04-30
AU2007334349B2 (en) 2011-06-23
AU2007334349A1 (en) 2008-06-26
EP2122142A1 (fr) 2009-11-25
BRPI0720456A2 (pt) 2014-01-14

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