EP3546738A1 - Procédé de fonctionnement d'un moteur à combustion interne - Google Patents

Procédé de fonctionnement d'un moteur à combustion interne Download PDF

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Publication number
EP3546738A1
EP3546738A1 EP19162432.9A EP19162432A EP3546738A1 EP 3546738 A1 EP3546738 A1 EP 3546738A1 EP 19162432 A EP19162432 A EP 19162432A EP 3546738 A1 EP3546738 A1 EP 3546738A1
Authority
EP
European Patent Office
Prior art keywords
fluid
combustion engine
internal combustion
tank
fluid tank
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Withdrawn
Application number
EP19162432.9A
Other languages
German (de)
English (en)
Inventor
Martin Boehm
Wilfried Kleczka
Andreas Bruhn
Bjoern HUSSMANN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke AG
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 AG filed Critical Bayerische Motoren Werke AG
Publication of EP3546738A1 publication Critical patent/EP3546738A1/fr
Withdrawn legal-status Critical Current

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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
    • F02D41/0025—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
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B47/00—Methods of operating engines involving adding non-fuel substances or anti-knock agents to combustion air, fuel, or fuel-air mixtures of engines
    • F02B47/02—Methods of operating engines involving adding non-fuel substances or anti-knock agents to combustion air, fuel, or fuel-air mixtures of engines the substances being water or steam
    • 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
    • F02D19/12—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 non-fuel substances or with anti-knock agents, e.g. with anti-knock fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
    • F02M25/022—Adding fuel and water emulsion, water or steam
    • F02M25/0227—Control aspects; Arrangement of sensors; Diagnostics; Actuators
    • 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
    • F02D2200/60—Input parameters for engine control said parameters being related to the driver demands or status
    • F02D2200/602—Pedal position
    • 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
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/04—Introducing corrections for particular operating conditions
    • F02D41/10—Introducing corrections for particular operating conditions for acceleration

Definitions

  • the invention relates to a method for operating an internal combustion engine with the features of the preamble of patent claim 1.
  • the fluid injection or water injection is a known method for improving performance or pollutant reduction, in particular the NOx raw emissions of internal combustion engines that operate on the gasoline or the diesel principle.
  • water or a water-alcohol mixture is usually injected as a fluid into the intake system or directly into the combustion chamber of a normally charged internal combustion engine.
  • the evaporating liquid has a cooling effect on the intake combustion air and thus reduces the compression work.
  • the water injection is only the increase in performance, not the increase in efficiency. Further, the water injection is used in Otto internal combustion engines to suppress a knocking combustion and thus in turn to increase the achievable performance.
  • the direct mixing of the fuel with the fluid is unfavorable, especially in transient operation, since the supplied fluid enters the combustion chamber only with a delay and after the shutdown of the fluid addition to the fuel for a longer time is effective.
  • the fuel injection system Before stopping the engine further at low ambient temperatures, the fuel injection system must be completely rinsed with pure fuel, otherwise the injection system can disadvantageously freeze.
  • a generic internal combustion engine is for example from the European patent application EP 2 653 693 A1 known.
  • an internal combustion engine is proposed with a fuel injection directly into the combustion chamber, which is bounded by a piston arranged in a cylinder, the cylinder and a cylinder head.
  • gas exchange valves for the gas exchange and a fuel injector for introducing the fuel are arranged in the cylinder head.
  • a water injector is provided for introducing water directly into the combustion chamber, wherein the water injector is arranged such that in a combustion chamber region in which a knocking combustion can take place, the combustion chamber surface can be sprayed with water.
  • the hot combustion chamber area is cooled specifically to prevent knocking combustion safely.
  • Object of the present invention is to show a measure, such as the range of a motor vehicle with an existing water tank can be increased and at the same time a spontaneous power loss of the internal combustion engine is avoided when the water tank is empty.
  • a continuous, or even stepwise power reduction of the internal combustion engine from a defined minimum level or a defined minimum range of the vehicle to increase the water range and to avoid a sudden, strong power reduction when the water tank is empty proposed.
  • the inventive method thus provides an increased water range, with a much lower customer perceived jump function of the power reduction of the internal combustion engine in the event that the water tank is suddenly empty.
  • FIG. 1 explains in three diagrams the inventive method.
  • a water tank level in this embodiment, is plotted from 0 to 5 liters on a Y-axis.
  • a X-axis corresponds to a time without units, over which the internal combustion engine is operated with the fluid injection.
  • An exemplary fluid level is numbered 1.
  • a break in the time axis is represented by a vertical, dashed, sinusoidal line. This corresponds to a time lapse, for a time during which the internal combustion engine is operated with a fluid injection.
  • the fluid level 1 drops over the time of five liters, which corresponds to a full water tank, to one liter. This time is shown with a dashed, vertical line. Following the fluid level continues to drop continuously down to zero, according to fluid tank or water tank empty. This time is again represented by a vertical dashed line. In the time after this dashed line in the direction of the X-axis, the water tank is empty and a fluid injection is no longer possible, d. H. the internal combustion engine runs with considerable power reduction.
  • an available drive power of the internal combustion engine is shown on the Y-axis.
  • the available drive power is shown in graph 2.
  • 100% available drive power corresponds to a maximum power of the internal combustion engine with maximum fluid injection.
  • Approximately 80% available drive power in this example corresponds to an operation of the internal combustion engine with reduced performance of the internal combustion engine, barely perceptible by many drivers.
  • This operating state is in the period of time from which the fluid tank level has dropped, for example, to one liter. This is the defined fluid level in the fluid tank in the present embodiment. From the time when the fluid tank is empty, the maximum available driving power of the internal combustion engine is at z. B. about 70% lowered because the engine would have a knocking operation or too high exhaust gas temperature at high power requirement without fluid addition.
  • the driver of the motor vehicle has, as already described, in this example only 80% of the maximum available drive power of the internal combustion engine. However, so that the driver, for example, in dangerous situations, or in overtaking maneuvers of other vehicles still has the full drive power available, during a period of reduction of Fluidmengenzumischung during a kick-down, numbered 4, this reduction is repealed.
  • the Y-axis shows an indication of the refill quantity, again from 0 to 5 liters.
  • the associated operating modes are shown below the X axis.
  • a fluid tank display is shown with a graph 3.
  • a normal operation of the internal combustion engine with maximum power is possible.
  • a power reduction of the internal combustion engine according to the invention is possible. This means that the maximum available drive power is only about 80%.
  • An indication of the replenishment amount of fluid in the fluid tank could be represented as low to very low. From the time when the fluid tank is empty, there is also a display water tank empty.
  • the performance degradation can be overwritten or overridden by kick-down 4 of the accelerator pedal.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
EP19162432.9A 2018-03-27 2019-03-13 Procédé de fonctionnement d'un moteur à combustion interne Withdrawn EP3546738A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102018204666.2A DE102018204666A1 (de) 2018-03-27 2018-03-27 Verfahren zum Betreiben einer Brennkraftmaschine

Publications (1)

Publication Number Publication Date
EP3546738A1 true EP3546738A1 (fr) 2019-10-02

Family

ID=65801950

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19162432.9A Withdrawn EP3546738A1 (fr) 2018-03-27 2019-03-13 Procédé de fonctionnement d'un moteur à combustion interne

Country Status (2)

Country Link
EP (1) EP3546738A1 (fr)
DE (1) DE102018204666A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021100967A1 (de) 2021-01-19 2022-07-21 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Brennkraftmaschine, Fahrzeug und Verfahren zum Betreiben einer Brennkraftmaschine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008175078A (ja) * 2007-01-16 2008-07-31 Nissan Motor Co Ltd エンジンの水噴射制御方法及び水噴射制御装置
EP3067544A1 (fr) * 2013-11-08 2016-09-14 Toyota Jidosha Kabushiki Kaisha Dispositif de commande d'alimentation en eau pour moteur à combustion interne à injection dans le cylindre
DE102016212903A1 (de) * 2016-07-14 2018-01-18 Robert Bosch Gmbh Verfahren und Vorrichtung zum Betreiben eines Verbrennungsmotors
DE102017116332A1 (de) * 2016-07-21 2018-01-25 Ford Global Technologies, Llc Verfahren und system zum steuern von wassereinspritzung
DE102017116322A1 (de) * 2016-07-21 2018-01-25 Ford Global Technologies, Llc Verfahren und System zur Steuerung der Wassereinspritzung
US20180038300A1 (en) * 2016-08-02 2018-02-08 Ford Global Technologies, Llc Methods and system for injecting water at different groups of cylinders of an engine

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012206242A1 (de) 2012-04-17 2013-10-17 Bayerische Motoren Werke Aktiengesellschaft Brennkraftmaschine
DE102014222471A1 (de) 2014-11-04 2016-05-04 Bayerische Motoren Werke Aktiengesellschaft Verfahren und ein System zum Betreiben von wenigstens einer Funktionseinheit eines Kraftfahrzeugs
US9957921B2 (en) * 2016-10-04 2018-05-01 Ford Global Technologies, Llc Method and system for controlling water injection

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008175078A (ja) * 2007-01-16 2008-07-31 Nissan Motor Co Ltd エンジンの水噴射制御方法及び水噴射制御装置
EP3067544A1 (fr) * 2013-11-08 2016-09-14 Toyota Jidosha Kabushiki Kaisha Dispositif de commande d'alimentation en eau pour moteur à combustion interne à injection dans le cylindre
DE102016212903A1 (de) * 2016-07-14 2018-01-18 Robert Bosch Gmbh Verfahren und Vorrichtung zum Betreiben eines Verbrennungsmotors
DE102017116332A1 (de) * 2016-07-21 2018-01-25 Ford Global Technologies, Llc Verfahren und system zum steuern von wassereinspritzung
DE102017116322A1 (de) * 2016-07-21 2018-01-25 Ford Global Technologies, Llc Verfahren und System zur Steuerung der Wassereinspritzung
US20180038300A1 (en) * 2016-08-02 2018-02-08 Ford Global Technologies, Llc Methods and system for injecting water at different groups of cylinders of an engine

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DE102018204666A1 (de) 2019-10-02

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