WO2018077620A1 - Procédé de détermination de la qualité d'un carburant liquide - Google Patents

Procédé de détermination de la qualité d'un carburant liquide Download PDF

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Publication number
WO2018077620A1
WO2018077620A1 PCT/EP2017/075962 EP2017075962W WO2018077620A1 WO 2018077620 A1 WO2018077620 A1 WO 2018077620A1 EP 2017075962 W EP2017075962 W EP 2017075962W WO 2018077620 A1 WO2018077620 A1 WO 2018077620A1
Authority
WO
WIPO (PCT)
Prior art keywords
fuel
pressure
low pressure
supply system
temperature
Prior art date
Application number
PCT/EP2017/075962
Other languages
German (de)
English (en)
Inventor
Thomas Scheuer
Johannes Geiger
Tobias Holzinger
Original Assignee
Bayerische Motoren Werke Aktiengesellschaft
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bayerische Motoren Werke Aktiengesellschaft filed Critical Bayerische Motoren Werke Aktiengesellschaft
Priority to EP17783487.6A priority Critical patent/EP3532719A1/fr
Publication of WO2018077620A1 publication Critical patent/WO2018077620A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/30—Controlling fuel injection
    • F02D41/38—Controlling fuel injection of the high pressure type
    • F02D41/3809—Common rail control systems
    • F02D41/3836—Controlling the fuel pressure
    • F02D41/3845—Controlling the fuel pressure by controlling the flow into the common rail, e.g. the amount of fuel pumped
    • F02D41/3854—Controlling the fuel pressure by controlling the flow into the common rail, e.g. the amount of fuel pumped with elements in the low pressure part, e.g. low pressure pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • 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
    • F02D2200/0612—Fuel type, fuel composition or fuel quality determined by estimation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2250/00—Engine control related to specific problems or objectives
    • F02D2250/02—Fuel evaporation in fuel rails, e.g. in common rails
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2250/00—Engine control related to specific problems or objectives
    • F02D2250/04—Fuel pressure pulsation in common rails

Definitions

  • the invention relates to a method for determining the quality of liquid fuel, in particular for use in motor vehicles, according to the preamble of the first claim.
  • Steam blistering by the engine control generally causes fuel economy issues, such as lowering the engine temperature by water cooling, acoustics and on-board power and battery loading, for example, by the electric fan running or by increased power consumption electric fuel pump.
  • High pressure area characterized in that during a
  • Fuel system decreases the stiffness of the fuel significantly. This has the consequence that occurring pressure oscillations in
  • resulting change in the pressure amplitude is determined by a suitable, belonging to the prior art model in the engine control from the measured values of the low pressure sensor and with a minimum value, which is dependent on the existing low pressure level, for example, compared. Exceeding this minimum value indicates the incipient steam bubble formation in the low-pressure region of the fuel system in the engine control.
  • Engine control unit a fuel pump in the low pressure range of
  • Fuel supply system controls so that there the fuel pressure is lowered continuously or in at least one stage.
  • a value of the associated fuel temperature can then advantageously be measured by means of a temperature sensor or determined by means of a computer model in the engine control unit from data stored there and / or further measured values received there.
  • Fuel temperature is measured by a temperature sensor at the hottest point of the fuel supply system, then preferably the hottest point of the fuel supply system in the
  • Low pressure range outside of the fuel tank can be simulated by heating the fuel at this point.
  • this method can cost, since only a low pressure sensor and possibly a temperature sensor are required, the vapor pressure behavior of a fuel fueled are recognized.
  • a possibility is created to use measures to avoid vapor bubble formation in the low-pressure region of the fuel system as needed, depending on fueled fuel.
  • a targeted detection of critical operating conditions caused by the onset of vapor bubble formation is made possible by characteristic measurement curves in the high or low pressure range of the fuel system.
  • the necessary low-pressure fuel sensor for other functionalities possible, for example for a low-pressure fuel control or for diagnostic purposes.
  • the sole figure shows an example of a diagram of a sudden change of amplitudes of measured low pressure fluctuations of a fuel pressure over a time of 30 seconds, due to a short shutdown or pressure reducing phase of a fuel pump in the low-pressure fuel circuit.
  • the inventive method determines the vapor pressure behavior of a fuel tank of a motor vehicle with a designed as a piston pump fuel pump in the fuel high pressure circuit by a fuel pump in the low-pressure fuel circuit at a certain time t is impressed by means of an engine control unit a brief shutdown or pressure reduction phase.
  • fuel pressure values are evaluated in the engine control unit to determine the course over time and a temperature variable, the vapor pressure behavior of the fuel and infer conclusion on a fuel quality, which then for the Continued operation of the internal combustion engine is taken into account by the engine control.
  • a change in the pressure amplitude 2 of the usually occurring pressure oscillations is determined via a suitable model in the engine control from the measured values of the low pressure sensor and compared with a minimum pressure amplitude, which is dependent on the existing low pressure level, for example. A shortfall of this minimum value of the pressure amplitudes 2 of the commonly occurring pressure oscillations indicates vapor bubble formation in the low-pressure region of the fuel system. At this time, a point of the vapor pressure curve is determined by the engine controller.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Abstract

L'invention concerne un procédé de détermination de la qualité d'un carburant liquide pour des moteurs à combustion interne dans une zone basse pression d'une installation d'alimentation en carburant d'un véhicule automobile, du point de vue des caractéristiques d'évaporation du carburant, par détection d'un moment de formation de bulles de vapeur et établissement d'une température du carburant associée à ce moment. L'invention est caractérisée en ce que, pendant un fonctionnement stationnaire du moteur à combustion, déclenché par une unité de commande du moteur, des bulles de vapeur se forment dans le carburant et, au moyen d'un capteur de pression dans la zone basse pression, on repère ainsi qu'une évaluation des mesures de pression de ce dernier indique par conséquent une brusque diminution de l'amplitude des variations de basse pression.
PCT/EP2017/075962 2016-10-28 2017-10-11 Procédé de détermination de la qualité d'un carburant liquide WO2018077620A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP17783487.6A EP3532719A1 (fr) 2016-10-28 2017-10-11 Procédé de détermination de la qualité d'un carburant liquide

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016221317.2A DE102016221317A1 (de) 2016-10-28 2016-10-28 Verfahren zur Qualitätsbestimmung von flüssigem Kraftstoff
DE102016221317.2 2016-10-28

Publications (1)

Publication Number Publication Date
WO2018077620A1 true WO2018077620A1 (fr) 2018-05-03

Family

ID=60080815

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2017/075962 WO2018077620A1 (fr) 2016-10-28 2017-10-11 Procédé de détermination de la qualité d'un carburant liquide

Country Status (3)

Country Link
EP (1) EP3532719A1 (fr)
DE (1) DE102016221317A1 (fr)
WO (1) WO2018077620A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018212642A1 (de) * 2018-07-30 2020-01-30 Bayerische Motoren Werke Aktiengesellschaft Verfahren und Steuergerät zum Betreiben eines Fahrzeuges

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3422506C2 (de) 1984-06-16 1993-12-02 Dea Mineraloel Ag Motor-Kraftstoffe auf Basis niederer Alkohole
WO2003012274A1 (fr) * 2001-07-31 2003-02-13 Volkswagen Aktiengesellschaft Circuiterie et procede pour la regulation d'une pompe electrique d'alimentation en carburant dans un systeme d'alimentation en carburant sans retour
WO2004067948A1 (fr) * 2003-01-13 2004-08-12 Siemens Aktiengesellschaft Systeme d'injection de carburant et procede pour determiner la pression d'alimentation d'une pompe a carburant
DE102007023746B3 (de) * 2007-05-22 2009-02-05 Continental Automotive Gmbh Verfahren und Vorrichtung zum Ermitteln eines Ethanolgehalts
DE102009028875A1 (de) * 2009-08-26 2011-03-03 Robert Bosch Gmbh Verfahren und Vorrichtung zur Bestimmung der Zusammensetzung eines Kraftstoffgemischs zum Betrieb einer Brennkraftmaschine
DE102013205452A1 (de) 2012-12-27 2014-07-03 Robert Bosch Gmbh Anordnung zur Bestimmung eines Verdampfungsverhaltens eines Kraftstoffs
DE102014218819A1 (de) * 2014-09-18 2016-03-24 Robert Bosch Gmbh Verfahren zum Überwachen einer Hochdruckpumpe
DE102015120578A1 (de) * 2014-12-02 2016-06-02 Ford Global Technologies, Llc Systeme und Verfahren zum Erfassen eines Kraftstoffdampfdrucks

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004062613B4 (de) * 2004-12-24 2014-02-20 Volkswagen Ag Verfahren und Vorrichtung zur Kraftstoffversorgung von Verbrennungsmotoren
DE102009045419B4 (de) * 2009-10-07 2022-07-14 Robert Bosch Gmbh Verfahren und Vorrichtung zur Bestimmung der Zusammensetzung eines Kraftstoffgemischs zum Betrieb einer Brennkraftmaschine

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3422506C2 (de) 1984-06-16 1993-12-02 Dea Mineraloel Ag Motor-Kraftstoffe auf Basis niederer Alkohole
WO2003012274A1 (fr) * 2001-07-31 2003-02-13 Volkswagen Aktiengesellschaft Circuiterie et procede pour la regulation d'une pompe electrique d'alimentation en carburant dans un systeme d'alimentation en carburant sans retour
WO2004067948A1 (fr) * 2003-01-13 2004-08-12 Siemens Aktiengesellschaft Systeme d'injection de carburant et procede pour determiner la pression d'alimentation d'une pompe a carburant
DE102007023746B3 (de) * 2007-05-22 2009-02-05 Continental Automotive Gmbh Verfahren und Vorrichtung zum Ermitteln eines Ethanolgehalts
DE102009028875A1 (de) * 2009-08-26 2011-03-03 Robert Bosch Gmbh Verfahren und Vorrichtung zur Bestimmung der Zusammensetzung eines Kraftstoffgemischs zum Betrieb einer Brennkraftmaschine
DE102013205452A1 (de) 2012-12-27 2014-07-03 Robert Bosch Gmbh Anordnung zur Bestimmung eines Verdampfungsverhaltens eines Kraftstoffs
DE102014218819A1 (de) * 2014-09-18 2016-03-24 Robert Bosch Gmbh Verfahren zum Überwachen einer Hochdruckpumpe
DE102015120578A1 (de) * 2014-12-02 2016-06-02 Ford Global Technologies, Llc Systeme und Verfahren zum Erfassen eines Kraftstoffdampfdrucks

Also Published As

Publication number Publication date
DE102016221317A1 (de) 2018-05-03
EP3532719A1 (fr) 2019-09-04

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