WO2009047294A1 - Moteur à combustion interne, en particulier moteur diesel, à préinjection d'émulsion aqueuse - Google Patents

Moteur à combustion interne, en particulier moteur diesel, à préinjection d'émulsion aqueuse Download PDF

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Publication number
WO2009047294A1
WO2009047294A1 PCT/EP2008/063540 EP2008063540W WO2009047294A1 WO 2009047294 A1 WO2009047294 A1 WO 2009047294A1 EP 2008063540 W EP2008063540 W EP 2008063540W WO 2009047294 A1 WO2009047294 A1 WO 2009047294A1
Authority
WO
WIPO (PCT)
Prior art keywords
oil
internal combustion
combustion engine
water emulsion
emulsion
Prior art date
Application number
PCT/EP2008/063540
Other languages
German (de)
English (en)
Inventor
Ralph Finger
Original Assignee
Ralph Finger
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 Ralph Finger filed Critical Ralph Finger
Publication of WO2009047294A1 publication Critical patent/WO2009047294A1/fr

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Classifications

    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10209—Fluid connections to the air intake system; their arrangement of pipes, valves or the like
    • F02M35/10216—Fuel injectors; Fuel pipes or rails; Fuel pumps or pressure regulators
    • 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
    • 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
    • F02M25/0228—Adding fuel and water emulsion
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the invention relates to an internal combustion engine, in particular a diesel engine, in which each cylinder has at least one injection nozzle, which injects fuel into the combustion chamber of the cylinder, and to a method for operating an internal combustion engine, in particular a diesel engine, wherein fuel into the combustion chamber of each cylinder is injected.
  • the diesel engine can be both a stationary diesel engine and the diesel engine of a motor vehicle. Basically, the diesel engine can be both a two-stroke and a four-stroke engine. As a rule, it is a four-stroke diesel engine of a motor vehicle.
  • the diesel engine may be one with direct injection. But it can also be a diesel engine with Vorkammeinspritzung.
  • the invention is also applicable to other internal combustion engines in which fuel is injected directly into the cylinders, such as in direct injection gasoline engines.
  • direct injection means the injection of diesel fuel directly into the main chamber of each cylinder and not into an antechamber adjacent to it Main room adjoins.
  • harder combustion pulses develop on the pistons than in a prechamber injection diesel engine. This results in the so-called “nailing" of a diesel engine with direct injection.
  • a device and a method for moistening the intake air in an internal combustion engine by introducing water into the intake tract of the internal combustion engine are known.
  • the water required for moistening the intake air is recovered from the condensate of an air conditioner arranged in the motor vehicle driven by the internal combustion engine and collected in a container.
  • the water is injected with an injector in the extraction.
  • no further details are given.
  • DE 10 2005 053 495 A1 there is described in DE 10 2005 053 495 A1 as a known process for the reduction of nitrogen oxides with the aid of water, to inject oil-water emulsions or water directly into the cylinder of an internal combustion engine.
  • the invention has for its object to provide an internal combustion engine, in particular a diesel engine, and a method for operating an internal combustion engine, in particular a diesel engine, of the type described above, which can be implemented using basically known engine concepts and reduce both the noise and the soot emissions.
  • At least one pilot injection nozzle is provided, with which an oil-in-water emulsion outside of the cylinders can be atomized into an air stream flowing into the cylinders.
  • the position of the pilot injector can correspond to the position of a non-injecting injector in a gasoline engine. At least in certain operating states of the internal combustion engine, it sprays the oil-in-water emulsion so that it is atomized into the air flow flowing into the cylinders.
  • a uniformly distributed oil content of the oil-in-water emulsion which is brought by the compression in the cylinder to ignite.
  • the new internal combustion engine is a diesel engine with direct injection, which is discussed in more detail below as a single example, without this being intended to preclude the advantageous application of the details described here to other internal combustion engines.
  • the pilot injector may atomize the oil-in-water emulsion prior to branching to the individual cylinders into the airflow entering the cylinders. Also in this case, the arrangement of the pilot injector may still correspond to the arrangement of an injection nozzle in a gasoline engine not directly injecting, as far as it has a single-point injection.
  • the pilot injection nozzle already atomizes the oil-in-water emulsion into the airflow between a turbocharger and an intake manifold.
  • This point is located in front of the usual location of an injection nozzle of a non-injecting gasoline engine.
  • the arrangement of the pilot injector well ahead of the cylinders provides for a particularly even distribution of the oil-in-water emulsion in the airflow entering the cylinders. This uniform distribution is fundamentally made more difficult by the fact that only very little oil is injected via the pilot injection nozzle.
  • the injection quantity is increased by the oil-in-water emulsion.
  • This already allows a simpler distribution of the oil in the air flow.
  • an existing internal combustion engine can be retrofitted at this point particularly easily with a pilot injector.
  • the injection nozzle of the new internal combustion engine can inject the fuel into the already self-ignited oil-water-air mixture in the cylinder.
  • a multi-stage injection of the fuel through the injector into the cylinder is unnecessary or the running behavior of an existing diesel engine with single-stage direct injection is particularly strongly influenced positively.
  • pilot injector it is advantageous to set the throughput and / or the atomization of the oil-in-water emulsion through the pilot injector by a controller in dependence on the operating parameters of the internal combustion engine. So can the pilot injector initially remain inactive until the internal combustion engine has reached a certain operating temperature.
  • a high-pressure pump feeds the oil-in-water emulsion to the pilot injector.
  • the pilot injector can be clocked by driving a movable nozzle body. It is useful if a return line for non-aerosolized oil-in-water emulsion leads back to an emulsion tank of the pilot injector. This return line also makes it possible to avoid blistering by air entering or evaporating parts of the oil-in-water emulsion in the region of the pilot injector, even if there are elevated temperatures. The heat absorbed by the returning emulsion can this be withdrawn through a return cooler in the return line again.
  • the oil-in-water emulsion is preferably a stabilized, as homogeneous as possible emulsion of vegetable oil or modified mineral oil in water. There is thus no risk that the emulsion separates into its water and its oil component.
  • the stabilization of the emulsion may be controlled by additives, e.g. B. can be achieved in the form of emulsifiers.
  • a substantially homogeneous and stable emulsion of vegetable oil or modified mineral oil in water can also be used without additives by other chemical and / or physical methods such as e.g. High-pressure disintegration, d. H. be achieved for example by means of passage of the emulsion through the high pressure nozzle of a so-called homogenizer.
  • the fuel that is injected through the injector into the cylinder may also be wholly or partially composed of vegetable oil. Often, however, it will be a fossil fuel. Of particular interest is the present invention when the fuel is a diesel fuel which is injected directly into the respective cylinder.
  • both the new internal combustion engine and the new method for operating an internal combustion engine can be supplemented by measures for purifying the exhaust gas flow, for example by a catalytic converter or soot filter.
  • measures for purifying the exhaust gas flow for example by a catalytic converter or soot filter.
  • the air stream into which the oil-in-water emulsion is atomized according to the invention is typically conveyed by a turbocharger, the present invention can also be implemented without a turbocharger, ie for example in a so-called naturally aspirated direct injection diesel engine.
  • Fig. 1 shows schematically the structure of a new diesel engine and the flow of the new process.
  • the main component of the diesel engine 1 shown in FIG. 1 is an engine block 2, the cylinder, the valve provided thereon and Injectors, the exhaust manifold, the piston running in the cylinders, the crankcase, the crankshaft revolving therein, etc.
  • the engine block 2 Via a supply line 3 and a return line 4, the engine block 2 is in communication with a fuel tank 5 which supplies the injection nozzles of the engine block 2 with fuel.
  • an intake manifold 6 is attached, which is branched to the individual cylinders of the engine block 2.
  • the turbocharger 8 is preceded by an air filter 9.
  • a pilot injector 10 is provided which nebulizes an oil-in-water emulsion from an emulsion tank 11 into the air stream 7.
  • the pilot injection pump 10 receives the oil-in-water emulsion from the emulsion tank 1 1 from a high pressure pump 12 via a high pressure line 13.
  • the pilot injection pump is, for example, a controlled 6- or 8-hole nozzle, via a controller 14 in their Abspritzfrequenz and thus their throughput is variably controllable. After reaching an engine operating temperature, which is detected by the controller 14, the preinjection nozzle is subjected to a dependent of the speed and the load state of the diesel engine 1 operating frequency.
  • the pilot injector 10 opens and closes, with the principle of the hydraulic ram being used in the high-pressure line 13.
  • a return line 14 to the emulsion tank 1 1 analogous to the return line 4 to the Diesel tank 5 is provided in order to compensate for any ingress of air through the injector 10 in the high pressure system.
  • a return cooler 15 is arranged, which prevents the emulsion at high pressure heats up so much that it comes to a vapor bubble formation.
  • the controller 14, which is interconnected via signal lines 16 to 19, in addition to the control of the pilot injector 10, for example, the entire diesel engine 1 convert into an emergency program when the emulsion tank 11 is emptied to even without the nebulization of the oil-in-water Emulsion in the air stream 7 to limit soot formation.

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  • 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)

Abstract

L'invention concerne un moteur à combustion interne (1) dans lequel au moins un injecteur injecte du carburant dans chaque cylindre, comprenant un injecteur de préinjection (10) qui pulvérise une émulsion huile dans l'eau à l'extérieur des cylindres, dans un flux d'air (7) aspiré par les cylindres.
PCT/EP2008/063540 2007-10-09 2008-10-09 Moteur à combustion interne, en particulier moteur diesel, à préinjection d'émulsion aqueuse WO2009047294A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007048379.3 2007-10-09
DE102007048379A DE102007048379A1 (de) 2007-10-09 2007-10-09 Verbrennungsmotor, insbesondere Dieselmotor, mit Wasseremulsionsvoreinspritzung

Publications (1)

Publication Number Publication Date
WO2009047294A1 true WO2009047294A1 (fr) 2009-04-16

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/063540 WO2009047294A1 (fr) 2007-10-09 2008-10-09 Moteur à combustion interne, en particulier moteur diesel, à préinjection d'émulsion aqueuse

Country Status (2)

Country Link
DE (1) DE102007048379A1 (fr)
WO (1) WO2009047294A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1399604B1 (it) * 2010-04-13 2013-04-26 Novatech Di Elisa Prandi Full rain : metodo per il controllo termo-barico di motore a combustione interna mediante iniezione di diluente termico.

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19635861A1 (de) * 1996-03-31 1997-10-16 Gerkinsmeyer Normann Dieselverbrennungsmaschine
WO2002073013A1 (fr) * 2001-03-14 2002-09-19 Marioff Corporation Oy Procede et dispositif pour reduire les emissions d'un moteur a combustion
WO2003031794A1 (fr) * 2001-10-09 2003-04-17 Southwest Research Institute Emploi de carburant oxygene avec injection d'eau permettant de reduire les emissions dans les dispositifs a allumage par compression
US20040103859A1 (en) * 2002-11-29 2004-06-03 Michael Shetley Diesel emission and combustion control system
US20070163537A1 (en) * 2006-01-13 2007-07-19 Honda Motor Co., Ltd. Homogeneous charge compression ignition internal combustion engine

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005053495A1 (de) * 2005-11-09 2006-12-28 Siemens Ag Vorrichtung und Verfahren zum Befeuchten der Ansaugluft bei Brennkraftmaschinen

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19635861A1 (de) * 1996-03-31 1997-10-16 Gerkinsmeyer Normann Dieselverbrennungsmaschine
WO2002073013A1 (fr) * 2001-03-14 2002-09-19 Marioff Corporation Oy Procede et dispositif pour reduire les emissions d'un moteur a combustion
WO2003031794A1 (fr) * 2001-10-09 2003-04-17 Southwest Research Institute Emploi de carburant oxygene avec injection d'eau permettant de reduire les emissions dans les dispositifs a allumage par compression
US20040103859A1 (en) * 2002-11-29 2004-06-03 Michael Shetley Diesel emission and combustion control system
US20070163537A1 (en) * 2006-01-13 2007-07-19 Honda Motor Co., Ltd. Homogeneous charge compression ignition internal combustion engine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
UDAYAKUMAR, SRIRAM: "Reduction of NOx Emissions by Water Injection into the Inlet Manifold of a DI Diesel Engine", SAE TECHNICAL PAPER SERIES, vol. 2003, no. 01-0264, 3 March 2003 (2003-03-03) - 6 March 2003 (2003-03-06), XP002514241 *

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Publication number Publication date
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