EP0471186A1 - Abgasreinigungseinrichtung für einen Dieselmotor - Google Patents

Abgasreinigungseinrichtung für einen Dieselmotor Download PDF

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Publication number
EP0471186A1
EP0471186A1 EP91111539A EP91111539A EP0471186A1 EP 0471186 A1 EP0471186 A1 EP 0471186A1 EP 91111539 A EP91111539 A EP 91111539A EP 91111539 A EP91111539 A EP 91111539A EP 0471186 A1 EP0471186 A1 EP 0471186A1
Authority
EP
European Patent Office
Prior art keywords
exhaust gas
channels
buffer body
purification device
gas purification
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Withdrawn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
EP91111539A
Other languages
German (de)
English (en)
French (fr)
Inventor
Horst Dr. Kalfa
Wilfried Dr. Schütz
Christian Dr. Streuber
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.)
Didier Werke AG
Original Assignee
Didier Werke 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 Didier Werke AG filed Critical Didier Werke AG
Publication of EP0471186A1 publication Critical patent/EP0471186A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2882—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices
    • 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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features
    • F01N13/009—Exhaust or silencing apparatus characterised by constructional features having two or more separate purifying devices arranged in series
    • 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
    • F01N2250/00—Combinations of different methods of purification
    • F01N2250/02—Combinations of different methods of purification filtering and catalytic conversion
    • 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
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition

Definitions

  • the invention relates to an exhaust gas cleaning device for a diesel engine, in which a soot particle filter is followed by a further unit for exhaust gas treatment, in particular a catalyst for NO x removal, and a heating device is provided for burning off deposits of the soot particle filter.
  • the further unit is a second filter that removes components contained in the exhaust gas that develop an unpleasant smell.
  • the soot particle filter burns, the other unit flows through against the flow device in normal operation.
  • the object of the invention is to propose an exhaust gas purification device of the type mentioned in the introduction, in which the further unit is protected from temperature peaks which occur when the soot of the particle filter burns off.
  • the above object is achieved in the exhaust gas purification device of the type mentioned at the outset in that a buffer body, in particular made of ceramic material, is arranged in the exhaust gas path between the soot particle filter and the aggregate and has a plurality of channels connecting the soot particle filter and the aggregate, which passages in the buffer body run in a grid, and that the free cross section of the channels based on the total cross section of the buffer body and the free surface of the channels are dimensioned as a heat exchanger surface so that part of the thermal energy occurring during the burning process is stored in the buffer body and after the burning process with the exhaust gas is dissipated.
  • a temperature of 700 C occurs in the soot particle filter.
  • the downstream, further unit could not withstand this temperature.
  • the buffer body absorbs part of the thermal energy from this temperature peak.
  • the temperature in the further unit only increases by an amount compared to the temperature in normal operation, which does not yet damage the unit.
  • the heat stored in the buffer is then also removed in normal operation. This also does not lead to damage to the further aggregate.
  • the end result is that the temperature peaks in the soot particle filter are smoothed by the buffer body in relation to the other aggregate. This smoothing is possible because the duration of the burning process is limited.
  • the hydraulic diameter of the channels is preferably between 5 mm and 20 mm, in particular 10 mm.
  • An exhaust gas cleaning device has a soot particle filter (1), which is followed by a buffer body (2) in the exhaust gas path (A).
  • the buffer body (2) is connected to a NO x catalyst (4) via a manifold (3). This is followed by an exhaust outlet (5).
  • a burner (6) for regenerating the soot particle filter (1) is connected upstream of the soot particle filter (1) in the exhaust gas path.
  • the buffer body (2) consists of a refractory, ceramic material.
  • the buffer body (2) can also consist of metal or a latent heat storage material. It has a large number of continuous channels (9) for the exhaust gas routing.
  • the channels (9) are arranged in a hexagon or triangle grid (cf. FIG. 2).
  • the channels (9) can also be arranged in a rectangular grid.
  • the hydraulic diameter (d) of the channels (9) is approximately 10 mm. It can be between 5 mm and 20 mm.
  • the grid spacing (e) is 2 d, but at least 1.5 d.
  • the length (L) of the buffer body (2) is, for example, 500 mm.
  • the free cross section of the buffer body (2) that is to say the total cross section of the channels (9), in the example is approximately 22% to 23% of the total cross section of the buffer body (2).
  • the total cross section of the buffer body (2) is 0.125 m 2.
  • the specific surface area that is to say the area of all the walls of the channels (9), is 90.7 m 2 per m 3 of the volume of the buffer body (2).
  • This heat transfer surface of the channels (9) can also be between 50 m 2 and 200 m 2 per m 3 of the buffer body (2).

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Processes For Solid Components From Exhaust (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
EP91111539A 1990-08-16 1991-07-11 Abgasreinigungseinrichtung für einen Dieselmotor Withdrawn EP0471186A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19904025933 DE4025933A1 (de) 1990-08-16 1990-08-16 Abgasreinigungseinrichtung fuer einen dieselmotor
DE4025933 1990-08-16

Publications (1)

Publication Number Publication Date
EP0471186A1 true EP0471186A1 (de) 1992-02-19

Family

ID=6412343

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91111539A Withdrawn EP0471186A1 (de) 1990-08-16 1991-07-11 Abgasreinigungseinrichtung für einen Dieselmotor

Country Status (2)

Country Link
EP (1) EP0471186A1 (enrdf_load_stackoverflow)
DE (1) DE4025933A1 (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7716922B2 (en) 2006-10-20 2010-05-18 International Truck Intellectual Property Company, Llc Diesel particulate filter (DPF) in-chassis cleaning method
US10808589B2 (en) 2018-04-26 2020-10-20 Hyundai Motor Company Exhaust treatment system and method for treating engine exhaust

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3672160A (en) * 1971-05-20 1972-06-27 Dae Sik Kim System for producing substantially pollution-free hot gas under pressure for use in a prime mover
GB2063092A (en) * 1979-11-21 1981-06-03 Degussa Catalyst protected against overheating
DE3322439A1 (de) * 1983-06-22 1985-01-03 Bedia Maschinenfabrik Verwaltungs GmbH, 5300 Bonn Einrichtung zur verminderung der schadstoffanteile in den abgasen eines verbrennungsmotors
DE3716446A1 (de) * 1987-05-16 1988-12-01 Dornier System Gmbh Katalytisches dieselruss-filter
DE3842282A1 (de) * 1987-12-16 1989-08-03 Toyota Motor Co Ltd Vorrichtung zur steuerung der abgasemission eines dieselmotors

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3672160A (en) * 1971-05-20 1972-06-27 Dae Sik Kim System for producing substantially pollution-free hot gas under pressure for use in a prime mover
GB2063092A (en) * 1979-11-21 1981-06-03 Degussa Catalyst protected against overheating
DE3322439A1 (de) * 1983-06-22 1985-01-03 Bedia Maschinenfabrik Verwaltungs GmbH, 5300 Bonn Einrichtung zur verminderung der schadstoffanteile in den abgasen eines verbrennungsmotors
DE3716446A1 (de) * 1987-05-16 1988-12-01 Dornier System Gmbh Katalytisches dieselruss-filter
DE3842282A1 (de) * 1987-12-16 1989-08-03 Toyota Motor Co Ltd Vorrichtung zur steuerung der abgasemission eines dieselmotors

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7716922B2 (en) 2006-10-20 2010-05-18 International Truck Intellectual Property Company, Llc Diesel particulate filter (DPF) in-chassis cleaning method
US10808589B2 (en) 2018-04-26 2020-10-20 Hyundai Motor Company Exhaust treatment system and method for treating engine exhaust

Also Published As

Publication number Publication date
DE4025933C2 (enrdf_load_stackoverflow) 1992-05-27
DE4025933A1 (de) 1992-02-20

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