EP3532719A1 - Procédé de détermination de la qualité d'un carburant liquide - Google Patents
Procédé de détermination de la qualité d'un carburant liquideInfo
- Publication number
- EP3532719A1 EP3532719A1 EP17783487.6A EP17783487A EP3532719A1 EP 3532719 A1 EP3532719 A1 EP 3532719A1 EP 17783487 A EP17783487 A EP 17783487A EP 3532719 A1 EP3532719 A1 EP 3532719A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fuel
- pressure
- low pressure
- supply system
- temperature
- Prior art date
- Legal status (The legal status 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 status listed.)
- Withdrawn
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.
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 |
PCT/EP2017/075962 WO2018077620A1 (fr) | 2016-10-28 | 2017-10-11 | Procédé de détermination de la qualité d'un carburant liquide |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3532719A1 true EP3532719A1 (fr) | 2019-09-04 |
Family
ID=60080815
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17783487.6A Withdrawn EP3532719A1 (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)
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 |
Family Cites Families (10)
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 |
DE10137315A1 (de) * | 2001-07-31 | 2003-02-20 | Volkswagen Ag | Schaltungsanordnung und Verfahren zur Regelung einer elektrischen Kraftstoffpumpe in einem rücklauffreien Kraftstoff-Fördersystem |
DE10300929B4 (de) * | 2003-01-13 | 2006-07-06 | Siemens Ag | Kraftstoffeinspritzsystem und Verfahren zur Bestimmung des Förderdrucks einer Kraftstoffpumpe |
DE102004062613B4 (de) * | 2004-12-24 | 2014-02-20 | Volkswagen Ag | Verfahren und Vorrichtung zur Kraftstoffversorgung von Verbrennungsmotoren |
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 |
DE102009045419B4 (de) * | 2009-10-07 | 2022-07-14 | 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 |
US9726105B2 (en) * | 2014-12-02 | 2017-08-08 | Ford Global Technologies, Llc | Systems and methods for sensing fuel vapor pressure |
-
2016
- 2016-10-28 DE DE102016221317.2A patent/DE102016221317A1/de not_active Withdrawn
-
2017
- 2017-10-11 WO PCT/EP2017/075962 patent/WO2018077620A1/fr unknown
- 2017-10-11 EP EP17783487.6A patent/EP3532719A1/fr not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
DE102016221317A1 (de) | 2018-05-03 |
WO2018077620A1 (fr) | 2018-05-03 |
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Legal Events
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AX | Request for extension of the european patent |
Extension state: BA ME |
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DAV | Request for validation of the european patent (deleted) | ||
DAX | Request for extension of the european patent (deleted) | ||
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20191217 |