EP3292289B1 - Procédé de fonctionnement d'un dispositif d'injection d'eau pour un moteur à combustion interne - Google Patents

Procédé de fonctionnement d'un dispositif d'injection d'eau pour un moteur à combustion interne Download PDF

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Publication number
EP3292289B1
EP3292289B1 EP16716879.8A EP16716879A EP3292289B1 EP 3292289 B1 EP3292289 B1 EP 3292289B1 EP 16716879 A EP16716879 A EP 16716879A EP 3292289 B1 EP3292289 B1 EP 3292289B1
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EP
European Patent Office
Prior art keywords
water
injectors
internal combustion
combustion engine
injector
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Application number
EP16716879.8A
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German (de)
English (en)
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EP3292289A1 (fr
Inventor
Simon Obergfaell
Peter Schenk
Ingmar Burak
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.)
Robert Bosch GmbH
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Robert Bosch GmbH
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Publication of EP3292289A1 publication Critical patent/EP3292289A1/fr
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    • 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
    • F02D41/042—Introducing corrections for particular operating conditions for stopping the engine
    • 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
    • F02M25/0221—Details of the water supply system, e.g. pumps or arrangement of valves
    • 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
    • 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
    • F02M25/025—Adding water
    • 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
    • F02M25/025—Adding water
    • F02M25/028—Adding water into the charge intakes
    • 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
    • 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

Definitions

  • the present invention relates to a method for operating a water injection device for an internal combustion engine.
  • a problem with known water injection systems is possible icing of water-carrying components of the water injection system.
  • antifreeze components are added to the water in the water injection system.
  • the inventive method for operating a water injection device for an internal combustion engine with the features of claim 1 has the advantage that damage to the components of the water injection device by icing can be avoided without the components being designed to withstand ice pressure. No additional fuel or additional components are required for this. Furthermore, a simple and inexpensive design of the water injection device is possible.
  • a method for operating a water injection device for an internal combustion engine which has a water tank for storing water, a conveying element for conveying the water, which is connected to the water tank, at least two water injectors for injecting water, which are each connected to the conveying element are connected, and comprises a control unit which is set up to open the water injectors one after the other, the conveying element being set up to suck in the water in the water injectors one after the other and to supply it to the water tank when the water injectors are open, in order to prevent the water injectors from icing up. Since the water injectors are opened one by one after negative pressure is built up in a delivery line, it can be ensured that
  • Residual water can be safely sucked out of each water injector. Furthermore, by opening the water injectors, air enters the water injectors, which leads to rapid delivery of the water from the water injectors to the water tank.
  • the invention changes that
  • the pump is set up to change the direction of rotation.
  • the water injectors after switching off the internal combustion engine, in particular after each shutdown Internal combustion engine, open.
  • the second water injector is opened when the first water injector is closed.
  • the second water injector is opened after a predetermined time has elapsed after the first water injector was closed.
  • the predetermined time is less than one second.
  • FIG 1 the internal combustion engine 2, which has a plurality of cylinders, and part of the water injection device 1 according to the invention is shown schematically.
  • the internal combustion engine 2 comprises a combustion chamber 20 per cylinder, in which a piston 21 can be moved back and forth. Furthermore, the internal combustion engine 2 preferably has an intake port 22 per cylinder, via which air is supplied to the combustion chamber 20 . Exhaust gas is discharged via an exhaust gas duct 23 .
  • an inlet valve 25 is arranged on the inlet duct 22 and an outlet valve 26 is arranged on the exhaust gas duct 23 .
  • Reference numeral 24 also designates a fuel injection valve.
  • a water injector 6 is also arranged on the intake port 22 and injects water into the intake port 22 of the internal combustion engine 2 via a control unit 10 .
  • one water injector 6 is provided per cylinder.
  • two water injectors can be arranged per cylinder for better treatment or to increase the maximum quantity of water that can be injected per combustion cycle.
  • the water injection device 1 comprises a conveying element 3 designed as a pump and an electric drive 4 for driving the pump. Furthermore, a water tank 5 is provided, which is connected to the conveying element 3 by a suction line 7 .
  • a delivery line 8 connects the delivery element 3 to a distributor 9 or a rail to which a large number of water injectors 6 are connected.
  • a first water injector 6a, a second water injector 6b, a third water injector 6c and a fourth water injector 6d are provided in this exemplary embodiment.
  • the number of water injectors may vary depending on engine design and combustion requirements.
  • FIG 2 the water injection device 1 according to the invention is shown in normal operation.
  • Normal operation is understood to be operation in which water is conveyed in a first conveying direction X1 from the water tank 5 to the water injectors 6a, 6b, 6c and 6d, so that the water is injected into the inlet channels 22 of the internal combustion engine 2.
  • a condensate of an evaporator (not shown) of an air conditioning system is preferably used for this, for which purpose the water injection device 1 according to the invention has an inlet line 11 .
  • deionized water can be pumped into the water tank 5 via a refill line 12 .
  • a sieve can optionally be provided in the refill line 12 .
  • a pre-filter 16 is arranged in the first line 7 and a fine filter 17 in the second line 8, which can optionally be heated.
  • a pressure regulator 15 in the form of an orifice plate 15 a and a check valve 15 b is arranged in a return line 13 which connects the delivery line 8 to the water tank 5 .
  • the check valve 15b can be used as the pressure regulator 15.
  • a pressure sensor 14 is also provided in the delivery line 8 for pressure control.
  • a temperature or level sensor 18 is provided.
  • the water injection device 1 is deactivated at temperatures below the freezing point of the water when driving or switching off the internal combustion engine, the water standing in the water injection device 1 can lead to icing of water-carrying components and in particular the water injectors 6.
  • the water which is in the water injectors 6 is sucked out of the water injectors 6, in particular when the internal combustion engine 2 is switched off.
  • the drive 4 of the conveying element 3 is controlled via the control unit 10 to change the operating direction of the conveying element 3 so that the water is supplied in a second conveying direction X2 through the conveying line 8 and the suction line 7 to the water tank 5 .
  • the water injectors 6a, 6b, 6c and 6d are opened one after the other via the control unit 10. This will be in the Figures 3 to 6 shown.
  • the first water injector 6a is opened for a first activation time and then closed again.
  • the water from the first water injector 6a is thus pumped back into the water tank 5 ( figure 3 ).
  • the first water injector 6a can be protected against icing.
  • the second water injector 6b is opened for a second control time and closed again, so that the second water injector 6b is emptied ( figure 4 ).
  • each water injector 6 is preferably closed before the next water injector 6 is emptied.
  • the maximum suction force of the conveying element 3 can be used to empty each water injector 6, which ensures that no water remains in the water injectors 6.
  • the first control time for the first water injector 6a, the second control time for the second water injector 6b and a third control time for the third water injector 6c and a fourth control time for the fourth water injector 6d are the same.
  • the water injectors 6 can also be opened for different times.
  • the suction of the water of the first water injector 6a, the second water injector 6b, the third water injector 6c and the fourth Water injector 6d are in the Figures 3 to 6 denoted by the reference symbols W a , W b , W c and W d .
  • the water injector 1 protects the water injectors 6 from freezing, in particular when the internal combustion engine 2 is switched off. A fail-safe mode of operation of the water injection device 1 and thus of the internal combustion engine 2 is thereby ensured.

Claims (4)

  1. Procédé pour faire fonctionner un dispositif d'injection d'eau (1) avec au moins deux injecteurs d'eau (6a, 6b) et un élément de refoulement (3) d'un moteur à combustion interne (2), le dispositif d'injection d'eau (1) comprenant un élément de refoulement (3) réalisé sous forme de pompe et un entraînement électrique (4) pour entraîner la pompe, un réservoir d'eau (5) étant en outre prévu, qui est relié à l'élément de refoulement (3) par une conduite d'aspiration (7), une conduite de refoulement (8) reliant l'élément de refoulement (3) à un distributeur (9) auquel est raccordée une pluralité d'injecteurs d'eau (6), les injecteurs d'eau (6a, 6b) étant ouverts successivement par une unité de commande (10), l'élément de refoulement (3) acheminant l'eau se trouvant dans les injecteurs d'eau (6a, 6b) vers le réservoir d'eau (5) du dispositif d'injection d'eau (1) lorsque les injecteurs d'eau (6a, 6b) sont ouverts, afin d'éviter un givrage des injecteurs d'eau (6a, 6b), l'eau qui se trouve dans les injecteurs d'eau (6a, 6b), notamment en cas d'arrêt du moteur à combustion interne (2), étant aspirée hors des injecteurs d'eau (6a, 6b), l'entraînement (4) de l'élément de refoulement (3) étant commandé par l'unité de commande (10) pour changer la direction de fonctionnement de l'élément de refoulement (3), de telle sorte que l'eau est acheminée vers le réservoir d'eau (5) dans une deuxième direction de refoulement (X2) à travers la conduite de refoulement (8) et la conduite d'aspiration (7), les injecteurs d'eau (6a, 6b) étant ouverts successivement par l'unité de commande (10) après l'établissement d'une dépression dans la conduite de refoulement (8).
  2. Procédé selon la revendication 1, dans lequel les injecteurs d'eau (6a, 6b) sont ouverts après l'arrêt du moteur à combustion interne (2), notamment après chaque arrêt du moteur à combustion interne (2).
  3. Procédé selon la revendication 1 ou 2, dans lequel le deuxième injecteur d'eau (6b) est ouvert lorsque le premier injecteur d'eau (6a) est fermé.
  4. Procédé selon la revendication 3, dans lequel le deuxième injecteur d'eau (6b) est ouvert après l'écoulement d'un temps prédéterminé après la fermeture du premier injecteur d'eau (6a).
EP16716879.8A 2015-05-07 2016-04-18 Procédé de fonctionnement d'un dispositif d'injection d'eau pour un moteur à combustion interne Active EP3292289B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015208508.2A DE102015208508A1 (de) 2015-05-07 2015-05-07 Wassereinspritzvorrichtung für eine Brennkraftmaschine und Verfahren zum Betreiben einer solchen Wassereinspritzvorrichtung
PCT/EP2016/058519 WO2016177561A1 (fr) 2015-05-07 2016-04-18 Dispositif de d'injection d'eau pour un moteur à combustion interne, et procédé de fonctionnement d'un tel dispositif d'injection d'eau

Publications (2)

Publication Number Publication Date
EP3292289A1 EP3292289A1 (fr) 2018-03-14
EP3292289B1 true EP3292289B1 (fr) 2023-02-22

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EP (1) EP3292289B1 (fr)
CN (1) CN107636293B (fr)
DE (1) DE102015208508A1 (fr)
WO (1) WO2016177561A1 (fr)

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DE102016216235A1 (de) * 2016-08-29 2018-03-01 Bayerische Motoren Werke Aktiengesellschaft Vorrichtung zur wassereinspritzung in einem fahrzeug sowie verfahren zum betrieb einer solchen vorrichtung
DE102017200045A1 (de) * 2017-01-04 2018-07-05 Robert Bosch Gmbh Wassereinspritzvorrichtung
DE102017200298A1 (de) * 2017-01-10 2018-07-12 Robert Bosch Gmbh Wassereinspritzvorrichtung einer Brennkraftmaschine und Verfahren zum Betreiben einer solchen Wassereinspritzvorrichtung
DE102017203609A1 (de) 2017-02-23 2018-08-23 Mahle International Gmbh Einrichtung zur Einspritzung von Wasser in eine Brennkraftmaschine
DE102017114213A1 (de) 2017-06-27 2018-12-27 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Wassereinspritz-Ventilanordnung
DE102017211907A1 (de) * 2017-07-12 2019-01-17 Robert Bosch Gmbh Verteilervorrichtung für eine Wassereinspritzvorrichtung einer Brennkraftmaschine
DE102017214481A1 (de) * 2017-08-21 2019-02-21 Robert Bosch Gmbh Wassereinspritzvorrichtung für eine Brennkraftmaschine
DE102017215751A1 (de) * 2017-09-07 2019-03-07 Robert Bosch Gmbh Wassereinspritzvorrichtung mit mindestens zwei Tanks
DE102017220914A1 (de) * 2017-11-23 2019-05-23 Robert Bosch Gmbh Wassereinspritzvorrichtung einer Brennkraftmaschine
DE102017222170B4 (de) * 2017-12-07 2022-12-08 Bayerische Motoren Werke Aktiengesellschaft Schaltverhalten von Injektoren eines Verbrennungsmotors
FR3077340B1 (fr) * 2018-01-29 2022-07-15 Plastic Omnium Advanced Innovation & Res Systeme d'injection d'une solution aqueuse dans un moteur a injection
JP6907973B2 (ja) * 2018-03-12 2021-07-21 トヨタ自動車株式会社 内燃機関の制御装置
DE102018206884A1 (de) * 2018-05-04 2019-11-07 Robert Bosch Gmbh Verfahren und Vorrichtung zum Befüllen einer Einspritzvorrichtung zum Einspritzen von Wasser in eine Brennkraftmaschine
DE102018208469B4 (de) * 2018-05-29 2024-02-08 Kautex Textron Gmbh & Co. Kg Anordnung und verfahren zum entleeren mindestens einer mit einem flüssigkeitstank verbundenen leitung
DE102018208655A1 (de) * 2018-05-30 2019-12-05 Bayerische Motoren Werke Aktiengesellschaft Wassereinspritzsystem für einen Verbrennungsmotor sowie Kraftfahrzeug mit einem solchen Wassereinspritzsystem
FR3081923B1 (fr) * 2018-05-30 2021-06-11 Plastic Omnium Advanced Innovation & Res Systeme d'injection d'une solution aqueuse dans un moteur a injection
DE102018208901A1 (de) * 2018-06-06 2019-12-12 Robert Bosch Gmbh Wassereinspritzvorrichtung für eine Brennkraftmaschine
DE102018210965A1 (de) * 2018-07-04 2020-01-09 Robert Bosch Gmbh Wassergewinnungsvorrichtung für eine Wassereinspritzvorrichtung für eine Brennkraftmaschine
DE102018220394A1 (de) 2018-11-28 2020-05-28 Robert Bosch Gmbh Vorrichtung zum Einspritzen von Wasser in einen Brennraum oder in einen Ansaugtrakt eines Verbrennungsmotors
DE102018220385A1 (de) 2018-11-28 2020-05-28 Robert Bosch Gmbh Einspritzventil für ein Wassereinspritzsystem eines Verbrennungsmotors sowie Wassereinspritzsystem mit einem solchen Einspritzventil
DE102019112907A1 (de) * 2019-05-16 2020-11-19 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Wassereinspritzvorrichtung einer Brennkraftmaschine und Verfahren zum Entlüften eines Wasser-Rails einer Wassereinspritzvorrichtung
DE102019210142A1 (de) * 2019-07-10 2021-01-14 Robert Bosch Gmbh Einspritzventil für ein Wassereinspritzsystem eines Verbrennungsmotors sowie Wassereinspritzsystem mit einem solchen Einspritzventil
DE102020108134B3 (de) 2020-03-25 2021-07-08 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Verbrennungsmotor
DE102020205585A1 (de) 2020-05-04 2021-11-04 Robert Bosch Gesellschaft mit beschränkter Haftung Einspritzventil für ein Wassereinspritzsystem eines Verbrennungsmotors sowie Wassereinspritzsystem mit einem solchen Einspritzventil
DE102020205582A1 (de) 2020-05-04 2021-11-04 Robert Bosch Gesellschaft mit beschränkter Haftung Einspritzventil für ein Wassereinspritzsystem eines Verbrennungsmotors sowie Wassereinspritzsystem mit einem solchen Einspritzventil
DE102020207594A1 (de) 2020-06-19 2021-12-23 Robert Bosch Gesellschaft mit beschränkter Haftung Einspritzventil für ein Wassereinspritzsystem eines Verbrennungsmotors sowie Wassereinspritzsystem mit einem solchen Einspritzventil
DE102020212241A1 (de) 2020-09-29 2022-03-31 Robert Bosch Gesellschaft mit beschränkter Haftung Einspritzventil für ein Wassereinspritzsystem eines Verbrennungsmotors sowie Wassereinspritzsystem mit einem solchen Einspritzventil
DE102020213842A1 (de) 2020-11-04 2022-05-05 Robert Bosch Gesellschaft mit beschränkter Haftung Einspritzventil für ein Wassereinspritzsystem eines Verbrennungsmotors sowie Wassereinspritzsystem mit einem solchen Einspritzventil
DE102020214479A1 (de) 2020-11-18 2022-05-19 Robert Bosch Gesellschaft mit beschränkter Haftung Einspritzventil für ein Wassereinspritzsystem eines Verbrennungsmotors sowie Wassereinspritzsystem mit einem solchen Einspritzventil

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Also Published As

Publication number Publication date
EP3292289A1 (fr) 2018-03-14
WO2016177561A1 (fr) 2016-11-10
CN107636293B (zh) 2020-03-20
CN107636293A (zh) 2018-01-26
DE102015208508A1 (de) 2016-11-10

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