EP2146063A2 - Dispositif de régénération - Google Patents

Dispositif de régénération Download PDF

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Publication number
EP2146063A2
EP2146063A2 EP09008216A EP09008216A EP2146063A2 EP 2146063 A2 EP2146063 A2 EP 2146063A2 EP 09008216 A EP09008216 A EP 09008216A EP 09008216 A EP09008216 A EP 09008216A EP 2146063 A2 EP2146063 A2 EP 2146063A2
Authority
EP
European Patent Office
Prior art keywords
catalyst
regeneration
burner
temperature
particulate filter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP09008216A
Other languages
German (de)
English (en)
Inventor
Christian Muschik
Hayri Winter
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.)
Friedrich Boysen GmbH and Co KG
Original Assignee
Friedrich Boysen GmbH and Co KG
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 Friedrich Boysen GmbH and Co KG filed Critical Friedrich Boysen GmbH and Co KG
Publication of EP2146063A2 publication Critical patent/EP2146063A2/fr
Withdrawn legal-status Critical Current

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    • 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
    • F01N3/02—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
    • F01N3/0253—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 adding fuel to exhaust gases
    • 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
    • F01N3/033—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 in combination with other devices
    • F01N3/035—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 in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters

Definitions

  • the present invention relates to a regeneration device for a particulate filter of an exhaust system, comprising an exhaust passage for discharging a hot exhaust gas stream from an internal combustion engine, in particular a diesel engine, and a catalyst, in particular an oxidation catalyst, which is integrated upstream of the particulate filter in the exhaust passage, the Exhaust system or the internal combustion engine comprises an injection device which is in communication with a fuel reservoir and is able to enter in particular hydrocarbonaceous fuel in the exhaust gas stream.
  • Combustion engines emit an exhaust gas stream into the atmosphere containing various types of pollutants.
  • various devices have been developed for exhaust aftertreatment.
  • catalysts are used for converting harmful gaseous substances into harmless components and particulate filters for collecting unwanted solid particles.
  • the exhaust gas line of a diesel engine may be provided, for example, with a diesel oxidation catalyst and a particle filter arranged downstream thereof. Soot particles that are in the exhaust gas flow are collected by the particle filter and stored in this. From a certain amount of accumulated soot must be removed from the particulate filter, so that the exhaust emission is not unduly hindered. This process is called regeneration.
  • a common method for the regeneration of a particulate filter is to heat the particulate filter to a certain temperature, so as to burn the soot stored. This can be done in principle by any Heater done. However, such a heater must have a relatively high power to heat the particulate filter to the ignition temperature of the soot, which has an increased demand for energy and installation space.
  • HC-Dosing secondary fuel injection
  • the regeneration device additionally comprises a burner capable of heating the catalyst to a reaction temperature at which an exothermic reaction of the injected fuel takes place, and at least one switching device capable of depending on an operating state of the exhaust system and / or the internal combustion engine optionally to activate and deactivate the burner and / or the injection device.
  • the catalyst can be heated at any time to the light-off temperature and the regeneration can be carried out regardless of the operating state of the internal combustion engine.
  • the burner can be designed much smaller and more energy-efficient than a burner for direct heating of the particulate filter, since according to the invention, the burner only has to be able to heat the catalyst to the reaction temperature. Since this is usually much lower than the burning temperature for stored soot particles, there are significant savings.
  • the switching device can select and activate the respectively suitable device or both and thus optimize the operation of the regeneration device as a whole.
  • the invention further relates to a method for regenerating a particulate filter of an exhaust system, comprising an exhaust passage for discharging a hot exhaust stream from an internal combustion engine, in particular a diesel engine, and a catalyst, in particular an oxidation catalyst, which is integrated upstream of the particulate filter in the exhaust passage, wherein the exhaust system or the internal combustion engine comprises an injection device which communicates with a fuel reservoir and in the Able to enter in particular hydrocarbon-containing fuel in the exhaust stream.
  • the method of the invention additionally comprises the steps of providing a combustor capable of heating the catalyst to a reaction temperature at which an exothermic reaction of the fuel occurs, determining an operating condition of the exhaust system and / or the internal combustion engine, and activating , in dependence on the determined operating state of the burner and / or the injection device in the case of regeneration of the particulate filter.
  • the switching device is designed to activate the burner and, if necessary, the injection device when the temperature of the catalyst is below the reaction temperature and regeneration of the particulate filter is to be carried out.
  • the switching device can activate the burner and thus ensure an efficient and rapid heating of the catalyst to the temperature necessary for a secondary fuel injection.
  • the injection device is activated, unless the exhaust gas stream already contains enough unused fuel.
  • the switching means is adapted to activate only the injection device when the temperature of the catalyst is above the reaction temperature and regeneration of the particulate filter is to be performed. In this way, superfluous operation of the burner is avoided and the regeneration of the particulate filter can be effectively done via the secondary fuel injection whenever possible.
  • the switching device can also be designed to deactivate the burner again when the temperature of the catalyst has risen above the reaction temperature. It is therefore switched directly to the more effective heating principle as soon as the catalyst has reached the required temperature. Depending on the application, it may be desirable to operate the burner simultaneously with the injector even after reaching the reaction temperature for a certain period of time or until reaching a certain threshold temperature.
  • the regeneration device may be formed as a modular unit, wherein the injection device is integrated in the modular unit. This makes it possible to install the regeneration device in the exhaust gas line of various internal combustion engines and brings advantages in terms of production and maintenance.
  • the burner and the injection device can be realized by a common component that can be easily integrated into a plurality of different exhaust systems.
  • a temperature of the catalyst can be determined for determining the operating state of the exhaust system, for example by a temperature sensor attached thereto.
  • an operating parameter of the internal combustion engine can be determined, for example, its temperature or speed.
  • the burner is activated when the temperature of the catalyst is below the reaction temperature and regeneration of the particulate filter is to be performed.
  • the temperature of the catalyst is above the reaction temperature and regeneration is to be performed, it is preferable to activate only the injector.
  • the burner can be deactivated again when the temperature of the catalyst has risen above the reaction temperature.
  • the exhaust passage 13 shown in the figure receives at an upstream end of the hot exhaust gas flow from an internal combustion engine (not shown) and passes this up to a tailpipe (not shown), through which the exhaust gases are discharged into the atmosphere. Before it escapes into the atmosphere, the exhaust gas flow, represented by an arrow, passes through a catalytic converter 15 and a particle filter 11 for limiting emissions.
  • the catalyst 15 may be a common oxidation catalyst, such as a diesel oxidation catalyst.
  • the particle filter 11 is a soot particle filter which filters out soot particles contained in the exhaust gas stream from the exhaust gas stream and stores it in its interior. Upstream of the catalyst 15, a regeneration device is arranged, which is designed here as a modular device or regeneration module 23.
  • the regeneration module 23 includes both an injector 17 and a burner 19, both of which communicate with the exhaust passage 13.
  • the injector 17 is also in communication with a fuel reservoir (not shown).
  • the connection between the regeneration module 23 and the exhaust duct 13 is such that on the one hand the injection device 17 opens into the exhaust passage 13 and on the other hand, the burner 19 has a sufficient thermal connection to the catalyst 15.
  • the regeneration module 23 can assume four different operating states. According to a first operating state, both the injection device 17 and the burner 19 is deactivated, ie there is neither fuel injection into the exhaust gas flow nor heating of the exhaust gas flow through the burner 19. According to a second operating state, the injection device 17 is deactivated and the burner 19 is activated That is, there is a heating of the exhaust gas flow through the burner 19, but no injection of fuel. According to a third operating state, the injector 17 is activated and the burner 19 is deactivated, ie the injector 17 injects fuel into the exhaust gas stream, but it does not heat up the exhaust gas stream The burner 19. According to a fourth operating state, both the injection device 17 and the burner 19 are activated, ie there is simultaneously an injection of fuel into the exhaust gas flow and a heating of the exhaust gas flow through the burner 19th
  • the switching device 21 may be a simple electrical circuit arrangement which uses, for example, a bimetallic strip for temperature determination. Alternatively, the switching device 21 may also comprise a complex integrated circuit. In the illustrated embodiment, the switching device 21 is formed as a separate control unit, which is remote from the regeneration module 23 and is connected via an electrical line with this. Alternatively, however, the switching device 21 can also be designed as an additional component which is positioned directly on or in the regeneration module 23. According to another embodiment, the switching device 21 may also be integrated in a control unit of the internal combustion engine.
  • the switching device 21 receives various input signals and controls the operation of the regeneration module 23 based thereon.
  • the switching device 21 receives a catalyst temperature signal 25 and a particulate filter loading signal 27.
  • various other input signals are conceivable by means of which it is decidable whether regeneration of the particulate filter 11 is performed should, whether the temperature of the catalyst 15 is above the light-off temperature and whether a fuel injection is required.
  • the switching device 21 checks, based on the catalyst temperature signal 25, whether the temperature of the catalyst 15 is below the reaction temperature at which an exothermic reaction of the injected fuel occurs. If so, the burner 19 is activated to warm the exhaust passage 13 and the catalyst 15. If necessary, the switching device 21 activates the injector 17, if necessary, to input unburned liquid hydrocarbons into the exhaust gas stream. If necessary, the switching device 21 activates the injector 17, if necessary. These react exothermally in the catalyst 15, releasing heat and increasing the catalyst temperature. The heating of the catalyst 15 through the burner 19 and the injection of fuel through the injector 17 run in parallel after reaching the reaction temperature until reaching a defined threshold temperature.
  • the burner 19 is deactivated by the switching device 21 again. Due to the exothermic reaction of the injected fuel, the catalyst 15 and the particulate filter 11 arranged in the immediate vicinity are heated to a temperature which is sufficient to achieve combustion of the soot particles in the particulate filter 11 and consequently regeneration of the particulate filter 11.
  • the regeneration device is formed as a modular unit which equally includes an injector 17 and a burner 19.
  • injection device 17 and burner 19 can be realized in a single, common component.
  • the injection device 17 and the burner 19 as form separate, separate devices and arrange them separately.
  • the injection device 17 may be realized by a fuel injection device provided for operating the internal combustion engine.
  • fuel is introduced with a time delay during the expansion stroke in the combustion chamber and thus at least partially unburned enters the exhaust stream. The injection of fuel takes place here inside the engine, which is why the provision of a separate injection device 17 is omitted.
  • the regeneration module 23 it is possible to perform a regeneration of the particulate filter 11 at arbitrary times and during any operating conditions of the exhaust system or the internal combustion engine, ie, for example, also immediately after the start of the internal combustion engine.
  • no expensive and space consuming heater is required for directly heating the particulate filter 11 to the soot burning temperature.
  • an increased fuel consumption is avoided because a fuel injection takes place only if it is also effective, so if the temperature of the catalyst 15 has risen above the light-off temperature.
  • the regeneration concept according to the invention is applicable to many different types of internal combustion engines in the industrial plant and motor vehicle sector.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Processes For Solid Components From Exhaust (AREA)
  • Exhaust Gas After Treatment (AREA)
EP09008216A 2008-07-15 2009-06-23 Dispositif de régénération Withdrawn EP2146063A2 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008033154A DE102008033154A1 (de) 2008-07-15 2008-07-15 Regenerationsvorrichtung

Publications (1)

Publication Number Publication Date
EP2146063A2 true EP2146063A2 (fr) 2010-01-20

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP09008216A Withdrawn EP2146063A2 (fr) 2008-07-15 2009-06-23 Dispositif de régénération

Country Status (5)

Country Link
US (1) US20100011743A1 (fr)
EP (1) EP2146063A2 (fr)
JP (1) JP2010031858A (fr)
CN (1) CN101644181A (fr)
DE (1) DE102008033154A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115355077A (zh) * 2022-09-23 2022-11-18 潍柴动力股份有限公司 驻车再生的控制方法、控制装置、可读存储介质及车辆

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120222399A1 (en) * 2011-03-03 2012-09-06 GM Global Technology Operations LLC Oxidation catalyst burn threshold adjustment to avoid quenching
DE102012216885B4 (de) * 2011-10-24 2014-05-08 Ford Global Technologies, Llc Abgasnachbehandlungssystem
JP6005413B2 (ja) * 2012-06-18 2016-10-12 日野自動車株式会社 排気浄化装置
DE102015220408A1 (de) * 2015-10-20 2017-04-20 Robert Bosch Gmbh Verfahren und Vorrichtung zur Beheizung eines Katalysators
DE102018125058B4 (de) * 2018-10-10 2020-09-24 Thomas Magnete Gmbh Vorrichtung zur Abgasnachbehandlung und Verfahren zum Betrieb der Vorrichtung
DE102018125056B4 (de) * 2018-10-10 2020-08-20 Thomas Magnete Gmbh Vorrichtung zur Abgasnachbehandlung und Verfahren zum Betrieb der Vorrichtung

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3089989B2 (ja) * 1995-05-18 2000-09-18 トヨタ自動車株式会社 ディーゼル機関の排気浄化装置
JP3520789B2 (ja) * 1998-12-22 2004-04-19 トヨタ自動車株式会社 内燃機関の排気浄化装置
JP2004092497A (ja) * 2002-08-30 2004-03-25 Mitsubishi Fuso Truck & Bus Corp ディーゼルエンジンの排気浄化装置
JP2004108344A (ja) * 2002-09-20 2004-04-08 Mitsubishi Fuso Truck & Bus Corp 内燃機関の排気浄化装置
JP2004324587A (ja) * 2003-04-25 2004-11-18 Mitsubishi Fuso Truck & Bus Corp 内燃機関の排気浄化装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115355077A (zh) * 2022-09-23 2022-11-18 潍柴动力股份有限公司 驻车再生的控制方法、控制装置、可读存储介质及车辆
CN115355077B (zh) * 2022-09-23 2024-04-16 潍柴动力股份有限公司 驻车再生的控制方法、控制装置、可读存储介质及车辆

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Publication number Publication date
CN101644181A (zh) 2010-02-10
DE102008033154A1 (de) 2010-01-21
US20100011743A1 (en) 2010-01-21
JP2010031858A (ja) 2010-02-12

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