EP3292289A1 - Water injection device for an internal combustion engine and method for operating a water injection device of said type - Google Patents

Water injection device for an internal combustion engine and method for operating a water injection device of said type

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Publication number
EP3292289A1
EP3292289A1 EP16716879.8A EP16716879A EP3292289A1 EP 3292289 A1 EP3292289 A1 EP 3292289A1 EP 16716879 A EP16716879 A EP 16716879A EP 3292289 A1 EP3292289 A1 EP 3292289A1
Authority
EP
European Patent Office
Prior art keywords
water
injectors
internal combustion
combustion engine
injection device
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.)
Granted
Application number
EP16716879.8A
Other languages
German (de)
French (fr)
Other versions
EP3292289B1 (en
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
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP3292289A1 publication Critical patent/EP3292289A1/en
Application granted granted Critical
Publication of EP3292289B1 publication Critical patent/EP3292289B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • F02D41/02—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 water injection device for an internal combustion engine and such an internal combustion engine. Another aspect of the invention relates to a method of operating such a water injection device.
  • Water injection system used to operate water
  • Antifreeze components added to the water of the water injection system. However, these components affect the burning behavior of the
  • the water injection device according to the invention for an internal combustion engine having the features of claim 1 has the advantage over that damage to the components of the water injection device can be avoided by icing, without the components are designed ice pressure resistant. This requires no additional fuel or additional components. Furthermore, a simple and inexpensive design of the water injection device is possible. This is inventively achieved by a water injection device for an internal combustion engine having 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, and a control unit, which is set up, the water injectors
  • Water to water injectors to be sucked in succession and supplied to the water tank when the water injectors are opened to prevent icing of the water injectors. Since the water injectors are opened one by one, it can be ensured that
  • Water residues from each water injector are safely extracted. Furthermore, by opening the water injectors, air enters the water injectors, resulting in rapid delivery of the water from the water injectors to the water injectors
  • the conveying element is set up to be operated in two conveying directions.
  • the water from the water injectors can be quickly conveyed to the water tank without additional components.
  • control unit is configured to open the water injectors after switching off the internal combustion engine, in particular after each shutdown of the internal combustion engine. This is particularly beneficial since the
  • Water injector is more sensitive to icing after the engine is turned off. This ensures that the
  • Water injection device is ready for operation the next time the internal combustion engine. Further preferably, the control unit is configured to open the second water injector when the first water injector is closed. As a result, the entire suction force of the conveying element is used for sucking back the water from each water injector.
  • control unit is set up to open the second water injector after a predetermined time has elapsed after closing the first water injector.
  • a predetermined time is less than one second.
  • Control unit set up the water injectors one after the other and in
  • control unit is set up, the first water injector for a first activation time and the second
  • control unit is set up to completely empty the water injectors.
  • damage to the water injectors is avoided by freezing, especially after the internal combustion engine is switched off.
  • control unit is set up to open the water injectors so that at least 10% of each located in the water injectors water volume is sucked. As water freezes by about 9%, it can be ensured that no damage to the
  • Water injectors happens, even if the water injectors are not designed ice-proof.
  • Another aspect of the present invention relates to an internal combustion engine comprising a water injection device according to the invention. The advantages obtained in relation to the water injection device according to the invention remain here as well.
  • the internal combustion engine is set up to be operated with gasoline and the Otto principle.
  • the internal combustion engine is to be understood, in which a combustion of gasoline or gasoline-air mixture takes place by spark ignition in the form of a spark plug. Since in such an internal combustion engine, the ignition by the
  • Spark ignition is precisely predetermined and the combustion is improved by the injection of water, which takes place in order to suck back the water from the water injectors to ensure that a fail-safe and optimal operation of the internal combustion engine is achieved at the next power. Since icing of water-carrying components is avoided by the water injection device according to the invention can
  • Water injection is injected the required amount of water.
  • the water injection device according to the invention is used in an internal combustion engine with direct injection and turbocharging.
  • Another aspect of the present invention relates to a method for
  • Water injectors of an internal combustion engine wherein the water injectors are opened one after the other, and the conveying element feeds water located in the water injectors to a water tank of the water injection device.
  • Conveying element the operating direction.
  • the conveying element is designed as a pump
  • the pump is set to change the direction of rotation.
  • the water injectors after stopping the
  • Internal combustion engine opened. More preferably, 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 closing of the first water injector.
  • the predetermined time is less than one second.
  • first the first water injector is opened and after a predetermined time the second water injector is opened when the first
  • Water injector is still open. Then first the first water injector is closed and water is sucked out of the second water injector.
  • the second water injector is also closed.
  • Figure 1 is a greatly simplified schematic view of a
  • Water injection device 1 of an internal combustion engine 2 according to a preferred embodiment described in detail.
  • the Internal combustion engine 2 according to the Otto principle and operated with gasoline direct injection.
  • the internal combustion engine 2 which has a plurality of cylinders, and a part of the water injection device 1 according to the invention is shown schematically.
  • the internal combustion engine 2 comprises per cylinder a combustion chamber 20 in which a piston 21 is movable back and forth. Furthermore, preferably the internal combustion engine 2 per cylinder has an inlet channel 22, via which air is supplied to the combustion chamber 20. Exhaust gas is removed via an exhaust duct 23.
  • an inlet valve 25 and the exhaust duct 23, an outlet valve 26 are arranged on the inlet channel 22.
  • the reference numeral 24 also designates a fuel injection valve.
  • a water injector 6 is further arranged, which injects water into the inlet channel 22 of the internal combustion engine 2 via a control unit 10.
  • a water injector 6 per cylinder is provided.
  • two cylinders are provided.
  • the water injection device 1 comprises a pumping element 3 and an electric drive 4 for driving the pump. Furthermore, a water tank 5 is provided which by a
  • Suction line 7 is connected to the conveying element 3.
  • a conveying line 8 connects the conveying element 3 with a distributor 9 or a rail, to which a plurality of water injectors 6 is connected.
  • a first water injector 6a, a second water injector 6b, a third water injector 6c and a fourth water injector 6d are provided.
  • the number of water injectors may vary depending on the engine design and combustion requirements.
  • Normal operation means the operation in which water in a first conveying direction X1 from the water tank 5 to the
  • Water injectors 6 a, 6 b, 6 c and 6 d is promoted, so that the water is injected into the intake ports 22 of the internal combustion engine 2.
  • an air conditioner is preferably used, for which purpose the water injection device 1 according to the invention comprises a supply line 1 1.
  • deionized water can be conveyed into the water tank 5 via a refill line 1 2.
  • a refill line 1 may optionally be provided a sieve.
  • a pre-filter 16 are arranged in the first conduit 7 and a fine filter 17 in the second conduit 8, which can be optionally heated.
  • control unit 10 which is preferably designed as the control unit of the internal combustion engine 2
  • water is sucked out of the water tank 5 by means of the conveying element 3.
  • System pressure in the manifold 9 is a pressure regulator 15 in the form of an aperture 1 5a and a check valve 15b arranged in a return line 1 3, which connects the delivery line 8 with the water tank 5.
  • a pressure regulator 15 in the form of an aperture 1 5a and a check valve 15b arranged in a return line 1 3, which connects the delivery line 8 with the water tank 5.
  • only the check valve 15b can be used as the pressure regulator 1 5.
  • a pressure sensor 14 is further provided in the delivery line 8. Furthermore, a temperature or
  • Level sensor 18 is provided.
  • Delivery direction X2 through the delivery line 8 and the suction line 7 to the water tank 5 is supplied. After vacuum is built in the delivery line 8, the
  • the first water injector 6a is opened and closed again for a first activation time.
  • the second water injector 6b is opened and closed again for a second drive time, so that the second water injector 6b is emptied (FIG. 4).
  • each water injector 6 is closed before the emptying of the next water injector 6 takes place.
  • the maximum suction force of the conveying element 3 can be used for emptying each water injector 6, thereby ensuring that no water remains in the
  • Water injector 6c and a fourth drive time for the fourth water injector 6d equal. In the context of the invention, however, 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 designated in FIGS. 3 to 6 by the reference symbols W a , W b , W c and W d .

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

The present invention relates to a water injection device for an internal combustion engine, which water injection device has a water tank (5) for storing water, a delivery element (3) which serves for delivering the water and which is connected to the water tank (5), at least two water injectors (6a, 6b) which serve for injecting water and which are connected in each case to the delivery element (3), and a control unit (10) which is designed to successively open the water injectors (6a, 6b), wherein the delivery element (3) is designed to successively draw in water situated in the water injectors (6a, 6b) and supply said water to the water tank (5) when the water injectors are open, in order to prevent the water injectors (6a, 6b) from icing up.

Description

Beschreibung  description
Titel title
Wassereinspritzvorrichtunq für eine Brennkraftmaschine und Verfahren zum Betreiben einer solchen Wassereinspritzvorrichtunq  Water injection device for an internal combustion engine and method for operating such a water injection device
Stand der Technik State of the art
Die vorliegende Erfindung betrifft eine Wassereinspritzvorrichtung für eine Brennkraftmaschine sowie eine derartige Brennkraftmaschine. Ein weiterer Aspekt der Erfindung betrifft ein Verfahren zum Betreiben einer derartigen Wassereinspritzvorrichtung. The present invention relates to a water injection device for an internal combustion engine and such an internal combustion engine. Another aspect of the invention relates to a method of operating such a water injection device.
Aufgrund steigender Anforderungen an reduzierte Kohlenstoffdioxidemissionen werden Brennkraftmaschinen zunehmend hinsichtlich des Kraftstoffverbrauchs optimiert. Allerdings können bekannte Brennkraftmaschinen in Betriebspunkten mit hoher Last nicht optimal im Hinblick auf den Verbrauch betrieben werden, da der Betrieb durch Klopfneigung und hohe Abgastemperaturen begrenzt ist. Eine mögliche Maßnahme zur Reduzierung der Klopfneigung und zur Senkung der Abgastemperaturen ist die Einspritzung von Wasser. Hierbei sind üblicherweise separate Wassereinspritzsysteme vorhanden, um die Wassereinspritzung zu ermöglichen. So ist z.B. aus der WO 2014/080266 A1 ein Wassereinspritzsystem für eine Brennkraftmaschine mit Abgasrückführung bekannt, bei dem das Wasser in den Massenstrom der Abgasrückführung eingespritzt wird. Due to increasing demands on reduced carbon dioxide emissions, internal combustion engines are increasingly being optimized with regard to fuel consumption. However, known internal combustion engines can not be operated optimally in terms of consumption at operating points with high load, since the operation is limited by knock tendency and high exhaust gas temperatures. A possible measure to reduce the tendency to knock and to lower the exhaust gas temperatures is the injection of water. There are usually separate water injection systems available to allow the water injection. For example, e.g. from WO 2014/080266 A1 discloses a water injection system for an internal combustion engine with exhaust gas recirculation, in which the water is injected into the mass flow of the exhaust gas recirculation.
Ein Problem bei bekannten Wassereinspritzsystemen ist eine mögliche A problem with known water injection systems is one possible
Vereisung von wasserführenden Komponenten des Wassereinspritzsystems. Um das System auch bei Temperaturen unterhalb des Gefrierpunktes des im Icing of water-bearing components of the water injection system. To keep the system at temperatures below the freezing point of the
Wassereinspritzsystem verwendeten Wassers zu betreiben, werden Water injection system used to operate water
Frostschutzkomponenten dem Wasser des Wassereinspritzsystems zugesetzt. Diese Komponenten beeinflussen jedoch das Brennverhalten der Antifreeze components added to the water of the water injection system. However, these components affect the burning behavior of the
Brennkraftmaschine und erfordern zusätzliche Betriebsstoffe. Offenbarung der Erfindung Internal combustion engine and require additional supplies. Disclosure of the invention
Die erfindungsgemäße Wassereinspritzvorrichtung für eine Brennkraftmaschine mit den Merkmalen des Anspruchs 1 weist demgegenüber den Vorteil auf, dass eine Beschädigung der Bauteile der Wassereinspritzvorrichtung durch Vereisung vermieden werden kann, ohne dass die Bauteile eisdruckfest ausgelegt sind. Dazu sind kein weitere Betriebsstoff oder zusätzliche Komponenten erforderlich. Ferner ist ein einfaches und günstiges Design der Wassereinspritzvorrichtung möglich. Dies wird erfindungsgemäß durch eine Wassereinspritzvorrichtung für eine Brennkraftmaschine erreicht, welche einen Wassertank zur Speicherung von Wasser, ein Förderelement zur Förderung des Wassers, welches mit dem Wassertank verbunden ist, mindestens zwei Wasserinjektoren zum Einspritzen von Wasser, welche jeweils mit dem Förderelement verbunden sind, und eine Steuereinheit umfasst, welche eingerichtet ist, die Wasserinjektoren The water injection device according to the invention for an internal combustion engine having the features of claim 1 has the advantage over that damage to the components of the water injection device can be avoided by icing, without the components are designed ice pressure resistant. This requires no additional fuel or additional components. Furthermore, a simple and inexpensive design of the water injection device is possible. This is inventively achieved by a water injection device for an internal combustion engine having 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, and a control unit, which is set up, the water injectors
nacheinander zu öffnen, wobei das Förderelement eingerichtet ist, in dento open successively, wherein the conveying element is arranged in the
Wasserinjektoren befindliches Wasser nacheinander anzusaugen und zum Wassertank zuzuführen, wenn die Wasserinjektoren geöffnet sind, um eine Vereisung der Wasserinjektoren zu vermeiden. Da die Wasserinjektoren einer nach dem anderen geöffnet werden, kann sichergestellt werden, dass Water to water injectors to be sucked in succession and supplied to the water tank when the water injectors are opened to prevent icing of the water injectors. Since the water injectors are opened one by one, it can be ensured that
Wasserreste aus jedem Wasserinjektor sicher abgesaugt werden. Ferner tritt durch das Öffnen der Wasserinjektoren Luft in die Wasserinjektoren ein, was zu einer schnellen Förderung des Wassers aus den Wasserinjektoren zum Water residues from each water injector are safely extracted. Furthermore, by opening the water injectors, air enters the water injectors, resulting in rapid delivery of the water from the water injectors to the water injectors
Wassertank führt. Die Unteransprüche zeigen bevorzugte Weiterbildungen der Erfindung. Water tank leads. The dependent claims show preferred developments of the invention.
Vorzugsweise ist das Förderelement eingerichtet, in zwei Förderrichtungen betrieben zu werden. Somit kann das Wasser aus den Wasserinjektoren schnell ohne zusätzliche Komponenten zu dem Wassertank gefördert werden. Preferably, the conveying element is set up to be operated in two conveying directions. Thus, the water from the water injectors can be quickly conveyed to the water tank without additional components.
Bevorzugt ist die Steuereinheit eingerichtet, die Wasserinjektoren nach dem Abstellen der Brennkraftmaschine, insbesondere nach jedem Abstellen der Brennkraftmaschine, zu öffnen. Dies ist besonders vorteilhaft, da die Preferably, the control unit is configured to open the water injectors after switching off the internal combustion engine, in particular after each shutdown of the internal combustion engine. This is particularly beneficial since the
Wassereinspritzvorrichtung empfindlicher für eine Vereisung ist, nachdem die Brennkraftmaschine abgestellt ist. Somit wird sichergestellt, dass die Water injector is more sensitive to icing after the engine is turned off. This ensures that the
Wassereinspritzvorrichtung betriebsbereit beim nächsten Einschalten der Brennkraftmaschine ist. Ferner bevorzugt ist die Steuereinheit eingerichtet, den zweiten Wasserinjektor zu öffnen, wenn der erste Wasserinjektor geschlossen ist. Dadurch wird die gesamte Ansaugkraft des Förderelements zum Rücksaugen des Wassers aus jedem Wasserinjektor genutzt. Water injection device is ready for operation the next time the internal combustion engine. Further preferably, the control unit is configured to open the second water injector when the first water injector is closed. As a result, the entire suction force of the conveying element is used for sucking back the water from each water injector.
Insbesondere ist die Steuereinheit eingerichtet, den zweiten Wasserinjektor nach Ablauf einer vorbestimmten Zeit nach dem Schließen des ersten Wasserinjektors zu öffnen. Somit wird Unterdruck im zweiten Wasserinjektor aufgebaut. In vorteilhafter Weise ist die vorbestimmte Zeit weniger als eine Sekunde. In particular, the control unit is set up to open the second water injector after a predetermined time has elapsed after closing the first water injector. Thus, negative pressure is built up in the second water injector. Advantageously, the predetermined time is less than one second.
Nach einer alternativen bevorzugten Ausgestaltung der Erfindung ist die According to an alternative preferred embodiment of the invention is the
Steuereinheit eingerichtet, die Wasserinjektoren nacheinander und in Control unit set up the water injectors one after the other and in
überlappender Weise zu öffnen. So kann z.B. der zweite Wasserinjektor geöffnet werden, kurz bevor der erste Wasserinjektor geschlossen wird. Dabei gibt es einen zeitlichen Überlappungsbereich, während dessen beide Wasserinjektoren geöffnet sind. Dadurch kann das Rücksaugen des Wassers aus den overlapping way to open. Thus, e.g. the second water injector are opened just before the first water injector is closed. There is a temporal overlap area during which both water injectors are open. This can be the sucking back of the water from the
Wasserinjektoren schneller realisiert werden. Water injectors are realized faster.
Es kann ferner von Vorteil sein, wenn die Steuereinheit eingerichtet ist, den ersten Wasserinjektor für eine erste Ansteuerzeit und den zweiten It may also be advantageous if the control unit is set up, the first water injector for a first activation time and the second
Wasserinjektor für eine zweite Ansteuerzeit zu öffnen, wobei die erste To open water injector for a second drive time, with the first
Ansteuerzeit und die zweite Ansteuerzeit gleich sind. Somit wird die Steuerung der Wasserinjektoren erleichtert. Drive time and the second drive time are the same. Thus, the control of the water injectors is facilitated.
Besonders bevorzugt ist die Steuereinheit eingerichtet, die Wasserinjektoren vollständig zu entleeren. Dadurch wird eine Beschädigung der Wasserinjektoren durch ein Gefrieren vermieden, insbesondere nachdem die Brennkraftmaschine abgeschaltet ist. Particularly preferably, the control unit is set up to completely empty the water injectors. As a result, damage to the water injectors is avoided by freezing, especially after the internal combustion engine is switched off.
Ferner bevorzugt ist die Steuereinheit eingerichtet, die Wasserinjektoren so zu öffnen, dass mindestens 10% eines jeweils in den Wasserinjektoren befindlichen Wasservolumens angesaugt wird. Da sich Wasser beim Gefrieren um ca. 9% ausdehnt, kann somit sichergestellt, dass keine Beschädigung der Further preferably, the control unit is set up to open the water injectors so that at least 10% of each located in the water injectors water volume is sucked. As water freezes by about 9%, it can be ensured that no damage to the
Wasserinjektoren geschieht, auch wenn die Wasserinjektoren nicht eisdruckfest ausgelegt sind. Ein weiterer Aspekt der vorliegenden Erfindung betrifft eine Brennkraftmaschine, welche eine erfindungsgemäße Wassereinspritzvorrichtung umfasst. Die in Bezug auf die erfindungsgemäße Wassereinspritzvorrichtung erhaltenen Vorteile bleiben auch hier erhalten. Water injectors happens, even if the water injectors are not designed ice-proof. Another aspect of the present invention relates to an internal combustion engine comprising a water injection device according to the invention. The advantages obtained in relation to the water injection device according to the invention remain here as well.
Insbesondere ist die Brenn kraftmaschine eingerichtet, mit Benzin und nach dem Otto-Prinzip betrieben zu werden. Als eine solche Brennkraftmaschine ist die Brennkraftmaschine zu verstehen, bei welcher eine Verbrennung von Benzin bzw. Benzin-Luft-Gemisch durch Fremdzündung in Form einer Zündkerze erfolgt. Da bei einer solchen Brennkraftmaschine der Zündzeitpunkt durch die In particular, the internal combustion engine is set up to be operated with gasoline and the Otto principle. As such an internal combustion engine, the internal combustion engine is to be understood, in which a combustion of gasoline or gasoline-air mixture takes place by spark ignition in the form of a spark plug. Since in such an internal combustion engine, the ignition by the
Fremdzündung genau vorbestimmt ist und durch die Wassereinspritzung die Verbrennung verbessert wird, dient das in Reihenfolge stattfindende Rücksaugen des Wassers aus den Wasserinjektoren dazu, dass eine ausfallsichere und optimale Funktionsweise der Brennkraftmaschine bei dem nächsten Einschalten erzielt ist. Da durch die erfindungsgemäße Wassereinspritzvorrichtung eine Vereisung von wasserführenden Komponenten vermieden wird, kann Spark ignition is precisely predetermined and the combustion is improved by the injection of water, which takes place in order to suck back the water from the water injectors to ensure that a fail-safe and optimal operation of the internal combustion engine is achieved at the next power. Since icing of water-carrying components is avoided by the water injection device according to the invention can
sichergestellt werden, dass bei der nächsten verbrennungsrelevanten be sure that at the next combustion relevant
Wassereinspritzung die erforderte Wassermenge eingespritzt wird. Water injection is injected the required amount of water.
Insbesondere ist die erfindungsgemäße Wassereinspritzvorrichtung in einer Brennkraftmaschine mit Direkteinspritzung und Turboaufladung eingesetzt. In particular, the water injection device according to the invention is used in an internal combustion engine with direct injection and turbocharging.
Ein weiterer Aspekt der vorliegenden Erfindung betrifft ein Verfahren zum Another aspect of the present invention relates to a method for
Betrieben einer Wassereinspritzvorrichtung mit mindestens zwei Operating a water injection device with at least two
Wasserinjektoren einer Brennkraftmaschine, wobei die Wasserinjektoren nacheinander geöffnet werden, und das Förderelement in den Wasserinjektoren befindliches Wasser zu einem Wassertank der Wassereinspritzvorrichtung zuführt. Water injectors of an internal combustion engine, wherein the water injectors are opened one after the other, and the conveying element feeds water located in the water injectors to a water tank of the water injection device.
Zum Fördern des Wassers zum Wassertank ändert vorzugsweise das For conveying the water to the water tank preferably changes
Förderelement die Betriebsrichtung. Insbesondere wenn das Förderelement als Pumpe ausgebildet ist, ist die Pumpe eingerichtet, die Drehrichtung zu ändern. Conveying element the operating direction. In particular, when the conveying element is designed as a pump, the pump is set to change the direction of rotation.
Vorzugsweise werden die Wasserinjektoren nach dem Abstellen der Preferably, the water injectors after stopping the
Brennkraftmaschine, insbesondere nach jedem Abstellen der Internal combustion engine, in particular after each shutdown of
Brennkraftmaschine, geöffnet. Weiter bevorzugt wird der zweite Wasserinjektor geöffnet, wenn der erste Wasserinjektor geschlossen ist. Internal combustion engine, opened. More preferably, the second water injector is opened when the first water injector is closed.
Insbesondere wird der zweite Wasserinjektor nach Ablauf einer vorbestimmten Zeit nach dem Schließen des ersten Wasserinjektors geöffnet. Vorzugsweise ist die vorbestimmte Zeit kleiner als eine Sekunde. In particular, the second water injector is opened after a predetermined time has elapsed after the closing of the first water injector. Preferably, the predetermined time is less than one second.
Alternativ wird zuerst der erste Wasserinjektor geöffnet und nach Ablauf einer vorbestimmten Zeit der zweite Wasserinjektor geöffnet, wenn der erste Alternatively, first the first water injector is opened and after a predetermined time the second water injector is opened when the first
Wasserinjektor noch offen ist. Dann wird zuerst der erste Wasserinjektor geschlossen und Wasser aus dem zweiten Wasserinjektor weitergesaugt. Water injector is still open. Then first the first water injector is closed and water is sucked out of the second water injector.
Anschließend wird der zweite Wasserinjektor ebenfalls geschlossen. Subsequently, the second water injector is also closed.
Kurze Beschreibung der Zeichnungen Brief description of the drawings
Nachfolgend wird ein bevorzugtes Ausführungsbeispiel der Erfindung unter Bezugnahme auf die begleitende Zeichnung im Detail beschrieben. In der Zeichnung ist: Figur 1 eine stark vereinfachte schematische Ansicht einer Hereinafter, a preferred embodiment of the invention will be described in detail with reference to the accompanying drawings. In the drawing: Figure 1 is a greatly simplified schematic view of a
Brennkraftmaschine mit einer Wassereinspritzvorrichtung gemäß einem bevorzugten Ausführungsbeispiel der vorliegenden Erfindung, eine vereinfachte schematische Ansicht der Wassereinspritzvorrichtung gemäß dem bevorzugten  Internal combustion engine with a water injection device according to a preferred embodiment of the present invention, a simplified schematic view of the water injection device according to the preferred
Ausführungsbeispiel im normalen Betrieb, und  Embodiment in normal operation, and
Figuren 3 bis 6 vereinfachte, schematische Ansichten der erfindungsgemäßen Figures 3 to 6 simplified, schematic views of the invention
Wassereinspritzvorrichtung, anhand deren das erfindungsgemäße Verfahren erläutert wird.  Water injection device, based on which the inventive method is explained.
Ausführungsform der Erfindung Embodiment of the invention
Nachfolgend wird unter Bezugnahme auf die Figurenl bis 6 eine Hereinafter, with reference to the Figurenl to 6 a
Wassereinspritzvorrichtung 1 einer Brennkraftmaschine 2 gemäß einem bevorzugten Ausführungsbeispiel im Detail beschrieben. Insbesondere wird die Brennkraftmaschine 2 nach dem Otto-Prinzip und mit Benzindirekteinspritzung betrieben. Water injection device 1 of an internal combustion engine 2 according to a preferred embodiment described in detail. In particular, the Internal combustion engine 2 according to the Otto principle and operated with gasoline direct injection.
In Figur 1 ist die Brennkraftmaschine 2, welche eine Vielzahl von Zylindern aufweist, sowie ein Teil der erfindungsgemäßen Wassereinspritzvorrichtung 1 schematisch dargestellt. Die Brennkraftmaschine 2 umfasst pro Zylinder einen Brennraum 20, in welchem ein Kolben 21 hin und her bewegbar ist. Ferner weist vorzugsweise die Brennkraftmaschine 2 pro Zylinder einen Einlasskanal 22 auf, über welchen Luft zum Brennraum 20 zugeführt wird. Abgas wird über einen Abgaskanal 23 abgeführt. Hierzu sind am Einlasskanal 22 ein Einlassventil 25 und am Abgaskanal 23 ein Auslassventil 26 angeordnet. Das Bezugszeichen 24 bezeichnet ferner ein Kraftstoffeinspritzventil. In Figure 1, the internal combustion engine 2, which has a plurality of cylinders, and a part of the water injection device 1 according to the invention is shown schematically. The internal combustion engine 2 comprises per cylinder a combustion chamber 20 in which a piston 21 is movable back and forth. Furthermore, preferably the internal combustion engine 2 per cylinder has an inlet channel 22, via which air is supplied to the combustion chamber 20. Exhaust gas is removed via an exhaust duct 23. For this purpose, an inlet valve 25 and the exhaust duct 23, an outlet valve 26 are arranged on the inlet channel 22. The reference numeral 24 also designates a fuel injection valve.
Am Einlasskanal 22 ist ferner ein Wasserinjektor 6 angeordnet, welcher über eine Steuereinheit 10 Wasser in den Einlasskanal 22 der Brennkraftmaschine 2 einspritzt. In diesem Ausführungsbeispiel ist ein Wasserinjektor 6 pro Zylinder vorgesehen. Alternativ können zur besseren Aufbereitung oder zur Erhöhung der pro Verbrennungszyklus maximal einspritzbaren Wassermenge zwei At the inlet channel 22, a water injector 6 is further arranged, which injects water into the inlet channel 22 of the internal combustion engine 2 via a control unit 10. In this embodiment, a water injector 6 per cylinder is provided. Alternatively, for better treatment or to increase the maximum amount of water that can be injected per combustion cycle, two
Wasserinjektoren pro Zylinder angeordnet sein. Be arranged water injectors per cylinder.
In Figur 2 ist die erfindungsgemäße Wassereinspritzvorrichtung 1 im Detail gezeigt. Die Wassereinspritzvorrichtung 1 umfasst ein als Pumpe ausgebildetes Förderelement 3 und einen elektrischen Antrieb 4 zum Antreiben der Pumpe. Des Weiteren ist ein Wassertank 5 vorgesehen, welcher durch eine In Figure 2, the water injection device 1 according to the invention is shown in detail. The water injection device 1 comprises a pumping element 3 and an electric drive 4 for driving the pump. Furthermore, a water tank 5 is provided which by a
Ansaugleitung 7 mit dem Förderelement 3 verbunden ist. Eine Förderleitung 8 verbindet das Förderelement 3 mit einem Verteiler 9 bzw. einem Rail, an welchem eine Vielzahl von Wasserinjektoren 6 angeschlossen ist. Insbesondere sind in diesem Ausführungsbeispiel ein erster Wasserinjektor 6a, ein zweiter Wasserinjektor 6b, ein dritter Wasserinjektor 6c und ein vierter Wasserinjektor 6d vorgesehen. Natürlich kann die Anzahl der Wasserinjektoren je nach Design der Brennkraftmaschine und Anforderungen der Verbrennung variieren. Suction line 7 is connected to the conveying element 3. A conveying line 8 connects the conveying element 3 with a distributor 9 or a rail, to which a plurality of water injectors 6 is connected. In particular, in this embodiment, a first water injector 6a, a second water injector 6b, a third water injector 6c and a fourth water injector 6d are provided. Of course, the number of water injectors may vary depending on the engine design and combustion requirements.
In Figur 2 ist die erfindungsgemäße Wassereinspritzvorrichtung 1 im normalen Betrieb dargestellt. Als normaler Betrieb ist der Betrieb zu verstehen, bei welchem Wasser in einer ersten Förderrichtung X1 vom Wassertank 5 zu denIn Figure 2, the water injection device 1 according to the invention is shown in normal operation. Normal operation means the operation in which water in a first conveying direction X1 from the water tank 5 to the
Wasserinjektoren 6a, 6b, 6c und 6d gefördert wird, so dass das Wasser in die Einlasskanäle 22 der Brenn kraftmaschine 2 eingespritzt wird. Dafür wird bevorzugt ein Kondensat eines nicht gezeigten Verdampfers einer Klimaanlage verwendet, wozu die erfindungsgemäße Wassereinspritzvorrichtung 1 eine Zulaufleitung 1 1 aufweist. Water injectors 6 a, 6 b, 6 c and 6 d is promoted, so that the water is injected into the intake ports 22 of the internal combustion engine 2. For a condensate of an evaporator, not shown, an air conditioner is preferably used, for which purpose the water injection device 1 according to the invention comprises a supply line 1 1.
Alternativ oder zusätzlich zum Kondensat kann deionisiertes Wasser über eine Nachfüllleitung 1 2 in den Wassertank 5 gefördert werden. In der Nachfüllleitung 12 kann optional ein Sieb vorgesehen sein. Ferner sind ein Vorfilter 16 in der ersten Leitung 7 und ein Feinfilter 17 in der zweiten Leitung 8 angeordnet, welche optional beheizt werden können. Alternatively or in addition to the condensate, deionized water can be conveyed into the water tank 5 via a refill line 1 2. In the refill line 12 may optionally be provided a sieve. Further, a pre-filter 16 are arranged in the first conduit 7 and a fine filter 17 in the second conduit 8, which can be optionally heated.
Wird nun über die Steuereinheit 10, welche bevorzugt als die Steuereinheit der Brennkraftmaschine 2 ausgebildet ist, eine Wassereinspritzung unter normalen Umgebungstemperaturen angefordert, so wird mittels des Förderelements 3 Wasser aus dem Wassertank 5 angesaugt. Zum Einstellen des gewünschtenIf a water injection under normal ambient temperatures is requested via the control unit 10, which is preferably designed as the control unit of the internal combustion engine 2, water is sucked out of the water tank 5 by means of the conveying element 3. To set the desired
Systemdrucks im Verteiler 9 ist ein Druckregler 15 in der Form einer Blende 1 5a und eines Rückschlagventils 15b in einer Rücklaufleitung 1 3 angeordnet, welche die Förderleitung 8 mit dem Wassertank 5 verbindet. Nach einer alternativen Ausgestaltung der Erfindung kann nur das Rückschlagventil 15b als der Druckregler 1 5 benutzt werden. Zur Druckregelung ist ferner ein Drucksensor 14 in der Förderleitung 8 vorgesehen. Des Weiteren ist ein Temperatur- bzw. System pressure in the manifold 9 is a pressure regulator 15 in the form of an aperture 1 5a and a check valve 15b arranged in a return line 1 3, which connects the delivery line 8 with the water tank 5. According to an alternative embodiment of the invention, only the check valve 15b can be used as the pressure regulator 1 5. For pressure control, a pressure sensor 14 is further provided in the delivery line 8. Furthermore, a temperature or
Füllstandssensor 18 vorgesehen. Level sensor 18 is provided.
Wenn allerdings die Wassereinspritzvorrichtung 1 bei Temperaturen unterhalb des Gefrierpunktes des Wassers beim Fahren oder Abstellen der However, if the water injection device 1 at temperatures below the freezing point of the water when driving or parking the
Brennkraftmaschine deaktiviert ist, kann es aufgrund des in der  Internal combustion engine is deactivated, it may be due to in the
Wassereinspritzvorrichtung 1 stehenden Wassers zu einer Vereisung von wasserführenden Komponenten und insbesondere der Wasserinjektoren 6 führen. Water injection device 1 standing water lead to icing of water-bearing components and in particular the water injectors 6.
Um eine solche Vereisung zu vermeiden, wird das Wasser, welches sich in den Wasserinjektoren 6 befindet, insbesondere im Abstellfall der Brennkraftmaschine 2, aus den Wasserinjektoren 6 abgesaugt. Dazu wird der Antrieb 4 des In order to avoid such icing, the water, which is located in the water injectors 6, especially in Abstellfall the internal combustion engine 2, sucked out of the water injectors 6. For this purpose, the drive 4 of
Förderelements 3 über die Steuereinheit 1 0 gesteuert, die Betriebsrichtung des Förderelements 3 zu ändern, so dass das Wasser in einer zweiten Controlled conveying element 3 via the control unit 1 0, to change the operating direction of the conveying element 3, so that the water in a second
Förderrichtung X2 durch die Förderleitung 8 und die Ansaugleitung 7 zum Wassertank 5 zugeführt wird. Nachdem Unterdruck in der Förderleitung 8 aufgebaut ist, werden die Delivery direction X2 through the delivery line 8 and the suction line 7 to the water tank 5 is supplied. After vacuum is built in the delivery line 8, the
Wasserinjektoren 6a, 6b, 6c und 6d über die Steuereinheit 10 nacheinander geöffnet. Dies wird in den Figuren 3 bis 6 dargestellt. Water injectors 6a, 6b, 6c and 6d via the control unit 10 successively opened. This is illustrated in FIGS. 3 to 6.
Beim Öffnen der Wasserinjektoren 6 tritt Luft in die Wasserinjektoren 6 aufgrund des Unterdrucks in der Förderleitung 8 ein, was mit dem Bezugszeichen P bezeichnet ist. Durch die eintretende Luft wird das Wasser schnell zum When opening the water injectors 6, air enters the water injectors 6 due to the negative pressure in the delivery line 8, which is denoted by the reference P. Due to the incoming air, the water quickly becomes
Wassertank 5 gefördert. Water tank 5 promoted.
Insbesondere wird der erste Wasserinjektor 6a für eine erste Ansteuerzeit geöffnet und wieder geschlossen. Somit wird das Wasser des ersten In particular, the first water injector 6a is opened and closed again for a first activation time. Thus, the water of the first
Wasserinjektors 6a zurück in den Wassertank 5 gefördert (Figur 3). Dadurch kann der erste Wasserinjektor 6a vor einer Vereisung geschützt. Water injector 6 a back into the water tank 5 promoted (Figure 3). As a result, the first water injector 6a is protected from icing.
Nachdem eine vorbestimmte Zeit abgelaufen ist, wird der zweite Wasserinjektor 6b für eine zweite Ansteuerzeit geöffnet und wieder geschlossen, so dass der zweite Wasserinjektor 6b entleert wird (Figur 4). In ähnlicher Weise werden der dritte Wasserinjektor 6c (Figur 5) und der vierte Wasserinjektor 6d (Figur 6) entleert. After a predetermined time has elapsed, the second water injector 6b is opened and closed again for a second drive time, so that the second water injector 6b is emptied (FIG. 4). Similarly, the third water injector 6c (FIG. 5) and the fourth water injector 6d (FIG. 6) are emptied.
In anderen Worten wird vorzugsweise jeder Wasserinjektor 6 geschlossen, bevor das Entleeren des nächsten Wasserinjektors 6 erfolgt. Somit kann die maximale Ansaugkraft des Förderelements 3 zum Entleeren jedes Wasserinjektors 6 benutzt, wodurch sichergestellt wird, dass keine Wasserreste in den In other words, preferably each water injector 6 is closed before the emptying of the next water injector 6 takes place. Thus, the maximum suction force of the conveying element 3 can be used for emptying each water injector 6, thereby ensuring that no water remains in the
Wasserinjektoren 6 verbleiben.  Water injectors 6 remain.
Um eine gleichmäßige Entleerung aller Wasserinjektoren 6 zu ermöglichen, sind die erste Ansteuerzeit für den ersten Wasserinjektor 6a, die zweite Ansteuerzeit für den zweiten Wasserinjektor 6b sowie eine dritte Ansteuerzeit für den drittenIn order to allow a uniform emptying of all water injectors 6, the first drive time for the first water injector 6a, the second drive time for the second water injector 6b and a third drive time for the third
Wasserinjektor 6c und eine vierte Ansteuerzeit für den vierten Wasserinjektor 6d gleich. Im Rahmen der Erfindung können die Wasserinjektoren 6 aber auch für unterschiedliche Zeiten geöffnet werden. Das Absaugen des Wassers des ersten Wasserinjektors 6a, des zweitenWater injector 6c and a fourth drive time for the fourth water injector 6d equal. In the context of the invention, however, the water injectors 6 can also be opened for different times. The suction of the water of the first water injector 6a, the second
Wasserinjektors 6b, des dritten Wasserinjektors 6c und des vierten Wasserinjektors 6d sind in den Figuren 3 bis 6 mit den Bezugszeichen Wa, Wb, Wc und Wd bezeichnet. Water injector 6b, the third water injector 6c and the fourth Water injector 6d are designated in FIGS. 3 to 6 by the reference symbols W a , W b , W c and W d .
Es sei angemerkt, dass die Reihenfolge, in welcher die Wasserinjektoren 6 geöffnet werden, an die jeweiligen Anforderungen angepasst werden kann. It should be noted that the order in which the water injectors 6 are opened can be adapted to the respective requirements.
Durch die erfindungsgemäße Wassereinspritzvorrichtung 1 werden die By the water injection device 1 according to the invention are the
Wasserinjektoren 6 vor einem Gefrieren, insbesondere im Abstellfall der Brennkraftmaschine 2, geschützt. Eine ausfallsichere Funktionsweise der Wassereinspritzvorrichtung 1 und damit der Brenn kraftmaschine 2 wird hierdurch sichergestellt. Water injectors 6 from freezing, especially in the Abstellfall the internal combustion engine 2, protected. A fail-safe operation of the water injection device 1 and thus the internal combustion engine 2 is thereby ensured.

Claims

Wassereinspritzvorrichtung für eine Brennkraftmaschine, umfassend: Water injection device for an internal combustion engine, comprising:
- einen Wassertank (5) zur Speicherung von Wasser;  - A water tank (5) for storing water;
- ein Förderelement (3) zur Förderung des Wassers, welches mit dem Wassertank (5) verbunden ist,  a conveying element (3) for conveying the water, which is connected to the water tank (5),
- mindestens zwei Wasserinjektoren (6a, 6b) zum Einspritzen von  - At least two water injectors (6a, 6b) for injecting
Wasser, welche jeweils mit dem Förderelement (3) verbunden sind, und Water, which are each connected to the conveying element (3), and
- eine Steuereinheit (10), welche eingerichtet ist, die Wasserinjektoren (6a, 6b) nacheinander zu öffnen, a control unit (10) which is set up to open the water injectors (6a, 6b) in succession,
- wobei das Förderelement (3) eingerichtet ist, in den Wasserinjektoren (6a, 6b) befindliches Wasser nachaneinander anzusaugen und zu dem Wassertank (5) zuzuführen, wenn die Wasserinjektoren (6a, 6b) geöffnet sind, um eine Vereisung der Wasserinjektoren (6a, 6b) zu vermeiden.  wherein the conveying element (3) is arranged to suck water in the water injectors (6a, 6b) in succession and to supply them to the water tank (5) when the water injectors (6a, 6b) are opened in order to freeze the water injectors (6a, 6b). 6b).
Vorrichtung nach einem der vorherigen Ansprüche, wobei die Steuereinheit (10) eingerichtet ist, die Wasserinjektoren (6) nach dem Abstellen der Brennkraftmaschine (2), insbesondere nach jedem Abstellen der Device according to one of the preceding claims, wherein the control unit (10) is arranged, the water injectors (6) after stopping the internal combustion engine (2), in particular after each shutdown of
Brennkraftmaschine (2), zu öffnen.  Internal combustion engine (2), open.
Vorrichtung nach einem der vorherigen Ansprüche, wobei die Steuereinheit (10) eingerichtet ist, den zweiten Wasserinjektor (6b) zu öffnen, wenn der erste Wasserinjektor (6a) geschlossen ist. Device according to one of the preceding claims, wherein the control unit (10) is arranged to open the second water injector (6b) when the first water injector (6a) is closed.
Vorrichtung nach Anspruch 3, wobei die Steuereinheit (10) eingerichtet ist, den zweiten Wasserinjektor (6b) nach Ablauf einer vorbestimmten Zeit nach dem Schließen des ersten Wasserinjektors (6a) zu öffnen. An apparatus according to claim 3, wherein the control unit (10) is arranged to open the second water injector (6b) after a predetermined time has elapsed after closing of the first water injector (6a).
5. Vorrichtung nach Anspruch 1 oder 2, wobei die Steuereinheit (10) 5. Device according to claim 1 or 2, wherein the control unit (10)
eingerichtet ist, die Wasserinjektoren (6a, 6b) nacheinander und in überlappender Weise zu öffnen. Vorrichtung nach einem der vorherigen Ansprüche, wobei die Steuereinheit (10) eingerichtet ist, den ersten Wasserinjektor (6a) für eine erste is arranged to open the water injectors (6a, 6b) successively and in an overlapping manner. Device according to one of the preceding claims, wherein the control unit (10) is arranged, the first water injector (6a) for a first
Ansteuerzeit und den zweiten Wasserinjektor (6b) für eine zweite Driving time and the second water injector (6b) for a second
Ansteuerzeit zu öffnen, wobei die erste Ansteuerzeit und die zweite Ansteuerzeit gleich sind. Activation time to open, wherein the first drive time and the second drive time are the same.
Vorrichtung nach einem der vorherigen Ansprüche, wobei die Steuereinheit (10) eingerichtet ist, die Wasserinjektoren (6a, 6b) vollständig zu entleeren. Device according to one of the preceding claims, wherein the control unit (10) is arranged to completely empty the water injectors (6a, 6b).
Brennkraftmaschine, welche eine Wassereinspritzvorrichtung (1 ) nach einem der vorherigen Ansprüche umfasst. Internal combustion engine comprising a water injection device (1) according to one of the preceding claims.
Brennkraftmaschine nach Anspruch 8, welche eingerichtet ist, nach dem Otto-Prinzip und mit Benzin betrieben zu werden. Internal combustion engine according to claim 8, which is adapted to be operated on the Otto principle and with gasoline.
Verfahren zum Betreiben einer Wassereinspritzvorrichtung (1 ) mit mindestens zwei Wasserinjektoren (6a, 6b) einer Brennkraftmaschine (2), wobei die Wasserinjektoren (6a, 6b) nacheinander geöffnet werden, wobei das Förderelement (3) in den Wasserinjektoren (6a, 6b) befindliches Wasser zu einem Wassertank (5) der Wassereinspritzvorrichtung (1 ) zuführt, um eine Vereisung der Wasserinjektoren (6a, 6b) zu vermeiden. Method for operating a water injection device (1) having at least two water injectors (6a, 6b) of an internal combustion engine (2), the water injectors (6a, 6b) being opened successively, the conveying element (3) being located in the water injectors (6a, 6b) Water to a water tank (5) of the water injection device (1) supplies to avoid icing of the water injectors (6a, 6b).
Verfahren nach Anspruch 10, wobei die Wasserinjektoren (6a, 6b) nach dem Abstellen der Brennkraftmaschine (2), insbesondere nach jedem Abstellen der Brennkraftmaschine (2), geöffnet werden. A method according to claim 10, wherein the water injectors (6a, 6b) after stopping the internal combustion engine (2), in particular after each shutdown of the internal combustion engine (2), are opened.
Verfahren nach Anspruch 10 oder 1 1 , wobei der zweite Wasserinjektor (6b) geöffnet wird, wenn der erste Wasserinjektor (6a) geschlossen ist. A method according to claim 10 or 11, wherein the second water injector (6b) is opened when the first water injector (6a) is closed.
Verfahren nach Anspruch 12, wobei der zweite Wasserinjektor (6b) nach Ablauf einer vorbestimmten Zeit nach dem Schließen des ersten The method of claim 12, wherein the second water injector (6b) expires after a predetermined time has elapsed after closing the first one
Wasserinjektors (6a) geöffnet wird. Water injector (6a) is opened.
EP16716879.8A 2015-05-07 2016-04-18 Method for operating a water injection device for an internal combustion engine Active EP3292289B1 (en)

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Families Citing this family (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016216235A1 (en) * 2016-08-29 2018-03-01 Bayerische Motoren Werke Aktiengesellschaft APPARATUS FOR WATER INJECTION IN A VEHICLE AND METHOD FOR OPERATING SUCH A DEVICE
DE102017200045A1 (en) * 2017-01-04 2018-07-05 Robert Bosch Gmbh Water injection apparatus
DE102017200298A1 (en) * 2017-01-10 2018-07-12 Robert Bosch Gmbh Water injection device of an internal combustion engine and method for operating such a water injection device
DE102017203609A1 (en) 2017-02-23 2018-08-23 Mahle International Gmbh Device for injecting water into an internal combustion engine
DE102017114213B4 (en) 2017-06-27 2024-08-14 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Water injection valve arrangement
DE102017211907A1 (en) * 2017-07-12 2019-01-17 Robert Bosch Gmbh Distributor device for a water injection device of an internal combustion engine
DE102017214481A1 (en) * 2017-08-21 2019-02-21 Robert Bosch Gmbh Water injection device for an internal combustion engine
DE102017215751A1 (en) * 2017-09-07 2019-03-07 Robert Bosch Gmbh Water injection device with at least two tanks
DE102017220914A1 (en) * 2017-11-23 2019-05-23 Robert Bosch Gmbh Water injection device of an internal combustion engine
DE102017222170B4 (en) * 2017-12-07 2022-12-08 Bayerische Motoren Werke Aktiengesellschaft Switching behavior of injectors in a combustion engine
FR3077340B1 (en) 2018-01-29 2022-07-15 Plastic Omnium Advanced Innovation & Res SYSTEM FOR INJECTION OF AN AQUEOUS SOLUTION INTO AN INJECTION ENGINE
JP6907973B2 (en) * 2018-03-12 2021-07-21 トヨタ自動車株式会社 Internal combustion engine control device
DE102018206884A1 (en) * 2018-05-04 2019-11-07 Robert Bosch Gmbh Method and device for filling an injection device for injecting water into an internal combustion engine
DE102018208469B4 (en) * 2018-05-29 2024-02-08 Kautex Textron Gmbh & Co. Kg ARRANGEMENT AND METHOD FOR EMPTYING AT LEAST ONE LINE CONNECTED TO A LIQUID TANK
DE102018208655A1 (en) * 2018-05-30 2019-12-05 Bayerische Motoren Werke Aktiengesellschaft Water injection system for an internal combustion engine and motor vehicle with such a water injection system
FR3081923B1 (en) * 2018-05-30 2021-06-11 Plastic Omnium Advanced Innovation & Res SYSTEM FOR INJECTING AN AQUEOUS SOLUTION IN AN INJECTION ENGINE
DE102018208901A1 (en) * 2018-06-06 2019-12-12 Robert Bosch Gmbh Water injection device for an internal combustion engine
DE102018210965A1 (en) * 2018-07-04 2020-01-09 Robert Bosch Gmbh Water extraction device for a water injection device for an internal combustion engine
DE102018220385A1 (en) 2018-11-28 2020-05-28 Robert Bosch Gmbh Injection valve for a water injection system of an internal combustion engine and water injection system with such an injection valve
DE102018220394A1 (en) 2018-11-28 2020-05-28 Robert Bosch Gmbh Device for injecting water into a combustion chamber or into an intake tract of an internal combustion engine
DE102019112907A1 (en) * 2019-05-16 2020-11-19 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Water injection device of an internal combustion engine and method for venting a water rail of a water injection device
DE102019210142A1 (en) * 2019-07-10 2021-01-14 Robert Bosch Gmbh Injection valve for a water injection system of an internal combustion engine and water injection system with such an injection valve
DE102020108134B3 (en) 2020-03-25 2021-07-08 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Internal combustion engine
DE102020205582A1 (en) 2020-05-04 2021-11-04 Robert Bosch Gesellschaft mit beschränkter Haftung Injection valve for a water injection system of an internal combustion engine and water injection system with such an injection valve
DE102020205585A1 (en) 2020-05-04 2021-11-04 Robert Bosch Gesellschaft mit beschränkter Haftung Injection valve for a water injection system of an internal combustion engine and water injection system with such an injection valve
DE102020207594A1 (en) 2020-06-19 2021-12-23 Robert Bosch Gesellschaft mit beschränkter Haftung Injection valve for a water injection system of an internal combustion engine and water injection system with such an injection valve
DE102020212241A1 (en) 2020-09-29 2022-03-31 Robert Bosch Gesellschaft mit beschränkter Haftung Injection valve for a water injection system of an internal combustion engine and water injection system with such an injection valve
DE102020213842A1 (en) 2020-11-04 2022-05-05 Robert Bosch Gesellschaft mit beschränkter Haftung Injection valve for a water injection system of an internal combustion engine and water injection system with such an injection valve
DE102020214479A1 (en) 2020-11-18 2022-05-19 Robert Bosch Gesellschaft mit beschränkter Haftung Injection valve for a water injection system of an internal combustion engine and water injection system with such an injection valve

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4805571A (en) * 1985-05-15 1989-02-21 Humphrey Cycle Engine Partners, L.P. Internal combustion engine
US5125366A (en) * 1990-10-11 1992-06-30 Hobbs Cletus L Water introduction in internal combustion engines
DE4416886A1 (en) * 1994-05-13 1995-11-16 Mak Maschinenbau Krupp Device for injecting water into diesel engines
CN101135280A (en) * 2007-10-01 2008-03-05 绵阳新晨动力机械有限公司 Four-stroke petrol engine inner-vat sprinkler
US8505371B2 (en) * 2011-11-30 2013-08-13 Ford Global Technologies, Llc Methods for an exhaust fluid sensor
WO2014080266A1 (en) 2012-11-20 2014-05-30 Nostrum Energy Pte. Ltd. Internally cooled exhaust gas recirculation system for internal combustion engine and method thereof
DE102013204474A1 (en) * 2013-03-14 2014-09-18 Bayerische Motoren Werke Aktiengesellschaft Injection system and method for operating an injection system
DE102014204509A1 (en) * 2014-03-12 2015-09-17 Bayerische Motoren Werke Aktiengesellschaft Water injection system for an internal combustion engine
RU146725U1 (en) * 2014-04-09 2014-10-20 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Вологодская государственная молочнохозяйственная академия имени Н.В. Верещагина" SYSTEM FOR PRODUCING AND FEEDING A FUEL-WATER MIXTURE IN ICE

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WO2016177561A1 (en) 2016-11-10
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EP3292289B1 (en) 2023-02-22
DE102015208508A1 (en) 2016-11-10

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