EP3368756A1 - Dispositif de post-traitement des gaz d'échappement - Google Patents

Dispositif de post-traitement des gaz d'échappement

Info

Publication number
EP3368756A1
EP3368756A1 EP16788516.9A EP16788516A EP3368756A1 EP 3368756 A1 EP3368756 A1 EP 3368756A1 EP 16788516 A EP16788516 A EP 16788516A EP 3368756 A1 EP3368756 A1 EP 3368756A1
Authority
EP
European Patent Office
Prior art keywords
pressure sensor
injection device
pressure
additive
waste gas
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Withdrawn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
EP16788516.9A
Other languages
German (de)
English (en)
Inventor
Jan Hodgson
Karsten PIETSCHMANN
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.)
Continental Automotive GmbH
Original Assignee
Continental Automotive 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 Continental Automotive GmbH filed Critical Continental Automotive GmbH
Publication of EP3368756A1 publication Critical patent/EP3368756A1/fr
Withdrawn legal-status Critical Current

Links

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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/008—Mounting or arrangement of exhaust sensors in or on exhaust apparatus
    • 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
    • F01N2550/00—Monitoring or diagnosing the deterioration of exhaust systems
    • F01N2550/05—Systems for adding substances into 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
    • F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
    • F01N2560/08—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a pressure sensor
    • 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
    • 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
    • F01N2610/01—Adding substances to exhaust gases the substance being catalytic material in liquid form
    • 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
    • F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
    • 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
    • F01N2610/148—Arrangement of sensors
    • 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
    • F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/06—Parameters used for exhaust control or diagnosing
    • F01N2900/18—Parameters used for exhaust control or diagnosing said parameters being related to the system for adding a substance into the exhaust
    • F01N2900/1806—Properties of reducing agent or dosing system
    • F01N2900/1808—Pressure
    • 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 a device for exhaust aftertreatment, comprising a conveying device for conveying a liquid additive from a container, a pressure sensor, an exhaust pipe, a leading from the conveyor to the exhaust gas supply line and an injection device for introducing the subsidized additive into the exhaust pipe.
  • the additive metered as accurately as possible injected into the exhaust pipe ⁇ .
  • the quantity to be injected depends on various parameters. In addition to the amount and the pressure with which the additive is injected, crucial because the pressure of the spray pattern of the injected into the exhaust line additive and thus its distribution and mixing over the cross section of the exhaust pipe is determined.
  • a pressure sensor is used. For this purpose, it is known to arrange this on the conveying device or to integrate it into a module containing the conveying device. The disadvantage here is that the conveyor device generates pressure pulses during operation, which are detected by the pressure sensor.
  • the invention is therefore an object of the invention to provide a Vorrich ⁇ device for exhaust aftertreatment, which detects as closely as possible the prevailing at the injector pressure, with disturbing influences should be reduced or eliminated as possible.
  • the object is achieved in that the pressure sensor is arranged on the injection device.
  • the pressure sensor With the arrangement of the pressure sensor on the injector, the pressure in the immediate vicinity of the point is measured, which is for optimal injection of the liquid additive is crucial.
  • Due to the immediate proximity to the injection device ⁇ a pressure sensor is hydraulically rigidly connected to the injection device. Disturbing pressure pulses of the conveyor are reduced by the thus created large spatial separation. This is made possible, in particular, by the delivery line and the fluid column standing in it, since due to the fluid properties damping occurs. This effect, which has hitherto adversely affected the Druckmes ⁇ solution, is now used advantageously due to the new arrangement of the pressure sensor. This makes it possible to determine the pressure pulses at the injector. Disturbing effects are almost impossible.
  • the structure of the conveyor module containing conveyor module also simplified. Likewise, the installation space is verklei ⁇ nert, thereby increasing the useful volume of a container for the liquid additive, when the conveyor module is disposed in the container.
  • the most important advantage is that as a result of the arrangement and the thereby enabled determination of the pressure pulses to the injection device, a diagnosis of the injection device is made possible, for example, to be able to monitor each injection process. Since these deviations detected by the pressure sensor are often only slight, it is only through the arrangement according to the invention that it is possible to use these deviations for diagnosis.
  • the pressure behavior of a faultless injection device is determined in advance. If, during operation of the exhaust gas aftertreatment device according to the invention, deviations in the pressure behavior which exceed tolerances to be defined appear, this may indicate impairments of the injection device. Such impairments can be deposits at the injection point, via which the additive is injected into the exhaust gas line.
  • the arrangement of the pressure sensor on the housing of the injector can be achieved with little effort according to an advantageous embodiment.
  • the housings of existing injectors can continue to be used because the changes are very small.
  • the housing of the injection device has an opening into which the pressure sensor is inserted.
  • the pressure sensor is flanged to the housing of the injection device, and via an opening in the housing there is a pressure connection to the pressure sensor.
  • the pressure sensor Protection of the pressure sensor against environmental influences is achieved according to another advantageous embodiment in that the pressure sensor is arranged within the housing of the injection device.
  • FIG. 1 shows an inventive device for exhaust gas aftertreatment
  • Fig. 2, 3 enlarged views of the injection device.
  • FIG. 1 shows schematically a device for exhaust gas aftertreatment in a motor vehicle.
  • a Container 1 for the liquid additive in this case an aqueous urea solution, arranged.
  • the urea solution is sucked into the container 1 and conveyed via a delivery line 3 to an injection device 4.
  • the injection device 4 is arranged on an exhaust pipe 5 of the motor vehicle.
  • the urea solution is injected into the exhaust pipe 5, where it mixes with the exhaust gas.
  • exhaust gas streams to provide from ⁇ -reaching extent of the exhaust pipe 5 provided in the urea solution with a specific pressure at the injector 4 has to be applied.
  • the pressure is usually 5 to 7 bar.
  • a pressure sensor 6 is arranged, which is hydraulically rigidly connected to the injection device 4 due to the immediate vicinity. Is injected via the injection device 4 urea solution, the pressure drop caused thereby is absorbed by the pressure sensor 6 immediacy ⁇ bar and to the full extent.
  • FIG. 2 shows the injection device 4 arranged on the exhaust gas line 5 in a larger illustration.
  • the pressure sensor 6 is flanged. Via an opening 8, the pressure in the injection device 4 is detected directly by the pressure sensor 6 and fed via a line 9 as an electrical signal to a non-presented Darge ⁇ control unit.
  • the pressure sensor 6 is inserted into the opening 8 of the housing of the injection device 4, so that it is directly and directly in contact with the additive and measures the pressure prevailing in the injection device 4.

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)
  • Analytical Chemistry (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

La présente invention concerne un dispositif de post-traitement des gaz d'échappement, qui comporte un dispositif de refoulement (2) pour le refoulement d'un additif liquide prélevé dans un réservoir (1), un capteur de pression (6), une conduite d'échappement (5), une conduite de transport (3) reliant le dispositif de refoulement (2) à la conduite d'échappement (5), et un dispositif d'injection (4) destiné à introduire l'additif refoulé dans la conduite d'échappement (5). Le capteur de pression (6) est disposé sur le dispositif d'injection (4).
EP16788516.9A 2015-10-30 2016-10-28 Dispositif de post-traitement des gaz d'échappement Withdrawn EP3368756A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015221363 2015-10-30
PCT/EP2016/076110 WO2017072311A1 (fr) 2015-10-30 2016-10-28 Dispositif de post-traitement des gaz d'échappement

Publications (1)

Publication Number Publication Date
EP3368756A1 true EP3368756A1 (fr) 2018-09-05

Family

ID=58546265

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16788516.9A Withdrawn EP3368756A1 (fr) 2015-10-30 2016-10-28 Dispositif de post-traitement des gaz d'échappement

Country Status (6)

Country Link
US (1) US20180245500A1 (fr)
EP (1) EP3368756A1 (fr)
CN (1) CN108138635A (fr)
BR (1) BR112018006476A2 (fr)
DE (1) DE102016221299A1 (fr)
WO (1) WO2017072311A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113578051B (zh) * 2021-08-19 2024-04-19 合肥江淮汽车制管有限公司 一种具备废气处理的汽车排气管路

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2724419B2 (ja) * 1990-08-28 1998-03-09 日本特殊陶業株式会社 圧力センサ
WO2005033482A1 (fr) * 2003-10-02 2005-04-14 Nissan Diesel Motor Co., Ltd. Dispositif de nettoyage des gaz d'echappement pour moteur
US20060101810A1 (en) * 2004-11-15 2006-05-18 Angelo Theodore G System for dispensing fuel into an exhaust system of a diesel engine
DE102010004614A1 (de) * 2010-01-13 2011-07-14 Emitec Gesellschaft für Emissionstechnologie mbH, 53797 Tankanordnung und Dosiersystem für ein Reduktionsmittel
DE102010034709A1 (de) * 2010-08-18 2012-02-23 Emitec Gesellschaft Für Emissionstechnologie Mbh Dosiereinheit für ein Reduktionsmittel
KR101490931B1 (ko) * 2013-08-13 2015-02-06 현대자동차 주식회사 요소수 펌핑모듈

Also Published As

Publication number Publication date
CN108138635A (zh) 2018-06-08
WO2017072311A1 (fr) 2017-05-04
US20180245500A1 (en) 2018-08-30
BR112018006476A2 (pt) 2018-10-09
DE102016221299A1 (de) 2017-05-04

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