EP2511512A1 - Dispositif de décharge - Google Patents

Dispositif de décharge Download PDF

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Publication number
EP2511512A1
EP2511512A1 EP12002225A EP12002225A EP2511512A1 EP 2511512 A1 EP2511512 A1 EP 2511512A1 EP 12002225 A EP12002225 A EP 12002225A EP 12002225 A EP12002225 A EP 12002225A EP 2511512 A1 EP2511512 A1 EP 2511512A1
Authority
EP
European Patent Office
Prior art keywords
fuel
internal combustion
combustion engine
burner
supply unit
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.)
Ceased
Application number
EP12002225A
Other languages
German (de)
English (en)
Inventor
Michel-André Adam
Jörg Dr. Thiemann
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.)
Deutz AG
Original Assignee
Deutz AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Deutz AG filed Critical Deutz AG
Publication of EP2511512A1 publication Critical patent/EP2511512A1/fr
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/0047—Layout or arrangement of systems for feeding fuel
    • F02M37/0052—Details on the fuel return circuit; Arrangement of pressure regulators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
    • F01N3/025—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/36—Arrangements for supply of additional fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/14—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a fuel burner
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/03—Adding substances to exhaust gases the substance being hydrocarbons, e.g. engine fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails

Definitions

  • Such systems are for. B. known from the DE 10 2008 002 003 , There, a fuel injector for injecting fuel into a combustion chamber of an internal combustion engine is described, wherein the fuel injector is connected via a return line to a reservoir.
  • the fuel is branched off before the fuel metering unit (ZME / eng .: FCU) and fed via a fuel line to the metering device of the burner system.
  • the inlet for the fuel in the metering device is released and is at the pressure of the low-pressure circuit - generated by the fuel delivery pump - in front of the metering valves.
  • the DV2 is then controlled with a low frequency via a software-supported splitting algorithm and thus measures the quantity required for torch start at.
  • the DV1 automatically switches on. This ensures through its injected into the exhaust system and on the diesel oxidation catalyst (DOC) reactive amount for the necessary temperature increase for the regeneration of the diesel particulate filter (DPF).
  • DOC diesel oxidation catalyst
  • the object of the present invention is achieved by a device according to claim 1.
  • shut-off device provides a circuit which upon opening the shutoff valve provides for a permanent flow of fuel in the first stage of the system.
  • the first stage of the fuel system can be vented decoupled from engine constraints or active burner operation. Regardless of bleeding operations, a bleeder avoids a pressure increase due to re-heating effects, as the fuel pressure can relax over the additional path even after SV, DV1 and DV2 have been deactivated.
  • a Abgresvorraum offers advantages in terms of pressure stability in the fuel system. Due to the permanent flow, there is less positive and negative acceleration of the fuel column, which ensures pressure waves with a lower amplitude level, especially in the case of frequency-controlled metering valves. A further advantage is that the continuous flushing in connection with the removal of the fuel in the fuel system can not cause deposits, in particular due to premature aging of the thermal stress exposed fuel. Of particular advantage is such a solution in view of the use of vegetable oils, since, for example, no rapeseed oil deposits can occur when the internal combustion engine is operated with rapeseed oil.
  • This branch can be designed both as a free cross-section, as well as the hydraulic elements, such.
  • a throttle or orifice include, it is a measure to prevent strong pressure oscillations in the fuel system. Furthermore, strong pressure increases due to the introduction of temperature on the fluid are prevented. Furthermore, the fuel aging is prevented by unnecessary temperature increases.
  • An internal combustion engine 1 is in the in FIG. 1 illustrated embodiment, a 4-cylinder auto-ignition internal combustion engine 1, which may be equipped with a common-rail injection system, exhaust turbocharging and exhaust gas recirculation and of course any other cylinder numbers, in particular 1, 2, 3, 5, 6, 8, 10, 12, 16 , etc. may have.
  • the internal combustion engine 1 is supplied via a fresh gas line system 2 combustion air, while the fuel is injected via the injection system directly into the individual cylinder combustion chambers.
  • the exhaust gas is discharged into an exhaust manifold 3 and fed there via an exhaust pipe 4 an exhaust aftertreatment system 5.
  • the exhaust aftertreatment system 5 has a burner 6 and a catalyst and / or particulate filter 7.
  • a catalyst 7a and a particulate filter 7b are provided.
  • all known devices and device combinations suitable for exhaust aftertreatment can be present here.
  • a particle filter 7b may be present alone, in which case the particles filtered out of the exhaust gas and stored in the particle filter 7b are burned by the burner 6.
  • a combination of catalyst 7a and particulate filter 7b are present, in which case the possible configurations as SCR catalyst (selective catalytic reduction), oxidation catalyst and NOx storage catalyst, in each case in combination with particulate filter 7b, are present ,
  • the burner 6 is used to increase the exhaust gas temperature and to initiate the respective reaction in the corresponding catalyst 7a.
  • the exhaust gas is passed through the exhaust pipe 4 and the burner in full flow through the catalyst 7a and particulate filter 7b and leaves the system via an exhaust pipe 8.
  • the exhaust aftertreatment system 5 in one in the side stream or isolated system.
  • the burner 6 has a burner housing 9, to which or in which the essential burner components are attached, and a combustion chamber 10 connected to the burner housing 9, which projects into the exhaust gas conduit 4.
  • the combustion chamber 10 has an opening 11 in the flow direction of the exhaust gas toward the catalytic converter 7a, into which, for example, swirling components can be inserted.
  • the burner 6 is - shown by arrows 12a, 12b - fuel and combustion air supplied.
  • the exhaust aftertreatment system is controlled by an electronic control device, which may be part of the control system for the internal combustion engine 1.
  • This control device becomes necessary data, such as exhaust gas temperature upstream of the burner 6, downstream of the burner 6 and in the exhaust line 8 (possibly also in the catalytic converter 7a and the particle filter 7b), and optionally also pressure values in the exhaust gas flow upstream of the catalytic converter 7a and behind the particle filter 7b or in others Constellation of each existing components determined and forwarded. From further stored in the controller maps further data can be stored and, if necessary, queried.
  • FIG. 2 the fuel removal from a tank 23 to a fuel filter 25 via fuel lines 29, towards a disengageable and switchable dosing unit 30, is shown.
  • This fuel-carrying system can be vented by means of Ab Kunststoffvoriques 24 and avoids a temperature input to a liquid contained in a trapped volume in that the liquid is returned via the return line 22 of the fuel line 21 of the burner 1 in the tank 23 of the internal combustion engine.
  • Such a device can be used in particular in fuel systems of exhaust aftertreatment used, especially in burners, eg. For DPF regeneration.
  • the fuel pressure which is measured via the pressure sensor 32, builds up in the space behind the shutoff valve as a result of the inflow of the fuel.
  • the metering valve burner 18 and the metering valve 19 can in turn be controlled by the motor controller 31.
  • the operating state of the metering valves 18 and 19 is determined so as to properly control the default amounts of fuel.
  • FIG. 3 shows a comparison of the pressure curve over time in the fuel system with and without Ab horrvorraum.
  • FIG. 4a shows an in FIG. 2 used Abberichttechnisch 24 with return 22nd
  • FIG. 4b three cross-sectional variants of the discharge opening are shown.
  • the first variant shows a free circular cross-section.
  • a hydraulic throttle is shown in the second variant.
  • a hydraulic shutter shows variant three in FIG. 4b ,

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust Gas After Treatment (AREA)
EP12002225A 2011-04-14 2012-03-28 Dispositif de décharge Ceased EP2511512A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102011017028A DE102011017028A1 (de) 2011-04-14 2011-04-14 Absteuervorrichtung

Publications (1)

Publication Number Publication Date
EP2511512A1 true EP2511512A1 (fr) 2012-10-17

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ID=45999530

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12002225A Ceased EP2511512A1 (fr) 2011-04-14 2012-03-28 Dispositif de décharge

Country Status (2)

Country Link
EP (1) EP2511512A1 (fr)
DE (1) DE102011017028A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022195043A1 (fr) * 2021-03-17 2022-09-22 Bernd Niethammer Vanne de régulation de débit destinée à commander ou réguler un débit massique d'un fluide, ensemble comprenant une telle vanne de régulation de débit et procédé pour faire fonctionner une telle vanne de régulation de débit

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006009099A1 (de) * 2006-02-28 2007-08-30 Daimlerchrysler Ag Einspritzsystem mit einer Vorrichtung zum Dosieren von Kraftstoff in ein Abgassystem einer Brennkraftmaschine und einem Verfahren hierzu
WO2008080693A1 (fr) * 2006-12-28 2008-07-10 Robert Bosch Gmbh Dispositif de dosage de carburant dans le système de gaz d'échappement d'un moteur à combustion interne
DE102008002003A1 (de) 2008-05-27 2009-12-03 Robert Bosch Gmbh Kraftstoff-Injektor
DE102008026477A1 (de) * 2008-06-03 2009-12-10 Deutz Ag Abgasnachbehandlungssystem für eine selbstzündende Brennkraftmaschine
DE102009058379A1 (de) * 2009-12-15 2011-07-07 Deutz Ag, 51149 Verbrennungskraftmaschine

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8375705B2 (en) * 2008-05-30 2013-02-19 Caterpillar Inc. Exhaust system implementing low-temperature regeneration strategy

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006009099A1 (de) * 2006-02-28 2007-08-30 Daimlerchrysler Ag Einspritzsystem mit einer Vorrichtung zum Dosieren von Kraftstoff in ein Abgassystem einer Brennkraftmaschine und einem Verfahren hierzu
WO2008080693A1 (fr) * 2006-12-28 2008-07-10 Robert Bosch Gmbh Dispositif de dosage de carburant dans le système de gaz d'échappement d'un moteur à combustion interne
DE102008002003A1 (de) 2008-05-27 2009-12-03 Robert Bosch Gmbh Kraftstoff-Injektor
DE102008026477A1 (de) * 2008-06-03 2009-12-10 Deutz Ag Abgasnachbehandlungssystem für eine selbstzündende Brennkraftmaschine
DE102009058379A1 (de) * 2009-12-15 2011-07-07 Deutz Ag, 51149 Verbrennungskraftmaschine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022195043A1 (fr) * 2021-03-17 2022-09-22 Bernd Niethammer Vanne de régulation de débit destinée à commander ou réguler un débit massique d'un fluide, ensemble comprenant une telle vanne de régulation de débit et procédé pour faire fonctionner une telle vanne de régulation de débit

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