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EP1525386A2 - Dispositif pour determiner le taux de recyclage des gaz d'echappement d'un moteur a combustion interne - Google Patents

Dispositif pour determiner le taux de recyclage des gaz d'echappement d'un moteur a combustion interne

Info

Publication number
EP1525386A2
EP1525386A2 EP03764934A EP03764934A EP1525386A2 EP 1525386 A2 EP1525386 A2 EP 1525386A2 EP 03764934 A EP03764934 A EP 03764934A EP 03764934 A EP03764934 A EP 03764934A EP 1525386 A2 EP1525386 A2 EP 1525386A2
Authority
EP
European Patent Office
Prior art keywords
exhaust gas
sensor unit
gas recirculation
sensor
internal combustion
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Withdrawn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
EP03764934A
Other languages
German (de)
English (en)
Inventor
Markus Amman
Nicholas Fekete
Dirk Herbstritt
Aleksandar Knezevic
Ralf MÜLLER
Carsten Plog
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.)
Mercedes Benz Group AG
Original Assignee
DaimlerChrysler 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 DaimlerChrysler AG filed Critical DaimlerChrysler AG
Publication of EP1525386A2 publication Critical patent/EP1525386A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D41/0047—Controlling exhaust gas recirculation [EGR]
    • F02D41/0065—Specific aspects of external EGR control
    • F02D41/0072—Estimating, calculating or determining the EGR rate, amount or flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1439—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the position of the sensor
    • F02D41/144—Sensor in intake manifold
    • 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
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/11—Manufacture or assembly of EGR systems; Materials or coatings specially adapted for EGR systems
    • 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
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/17—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system
    • 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
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/45—Sensors specially adapted for EGR systems
    • F02M26/46—Sensors specially adapted for EGR systems for determining the characteristics of gases, e.g. composition
    • 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
    • F02M35/10222—Exhaust gas recirculation [EGR]; Positive crankcase ventilation [PCV]; Additional air admission, lubricant or fuel vapour admission
    • 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
    • F02M35/10373—Sensors for intake systems
    • F02M35/10393—Sensors for intake systems for characterising a multi-component mixture, e.g. for the composition such as humidity, density or viscosity
    • 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
    • Y02T10/40—Engine management systems

Definitions

  • the present invention relates to a device for determining the exhaust gas recirculation rate of an internal combustion engine according to the preamble of patent claim 1.
  • EGR exhaust gas recirculation
  • An increase in the exhaust gas recirculation rate with the aim of further reducing the NOX emission is, for example, set a different limit depending on the operating point, namely by the soot or particle emission increasing above certain recirculation rates, the fuel consumption and the deterioration in the smooth running of the internal combustion engine. Carrying out a regulation of the exhaust gas recirculation rate requires the ongoing recording of the respective recirculation conditions when the internal combustion engine is operating.
  • a sensor unit for determining the exhaust gas recirculation rate of an internal combustion engine is known from DE 100 070 10 AI.
  • the sensor unit is acted upon on the one hand by the exhaust gas atmosphere within the exhaust gas recirculation line, and on the other hand by the atmosphere of exhaust gas and fresh air present in the inlet line of the internal combustion engine after the exhaust gas recirculation line opens, the two gas atmospheres acting on the sensor unit being kept separate from one another.
  • DE 197 34 494 Cl discloses a method for operating an internal combustion engine with recirculation of exhaust gases from an exhaust gas line through an exhaust gas recirculation channel into an inlet line.
  • the respective oxygen content is measured in the gas streams before and after the exhaust gas recirculation channel flows into the inlet line by means of sensors and the controller unit from the measurement results the return rate is exactly determined.
  • a conventionally provided placement of a sensor on the wall of the intake manifold is a problem in that a sensor positioned in this way is not able to optimally react to rapid changes, for example a NOX concentration, because the flow rate of the gas to be detected on the wall of the elbow goes to zero. For this reason, among other things, a change in the gas composition will result in a time delay of the sensor signal, since the new or changed gas composition must flow against the entire sensor surface.
  • the object of the invention is to determine an EGR rate in the simplest possible manner with the greatest possible accuracy.
  • Pipe-shaped sensor units are also characterized by great mechanical stability.
  • Conventional planar sensors were embedded gas-tight in an appropriate holder. In operation, planar sensors were exposed to thermocyclic changes in mechanical stress due to different thermal expansion coefficients of the holder and sensor material. Mechanical stresses caused thereby can lead to sensor failure due to crack formation.
  • the EGR sensor unit which is of tubular design according to the invention, crack formation due to thermocyclic load changes can be largely avoided. Furthermore, complex seals are not required in the case of a tubular sensor unit.
  • the sensor unit it proves to be expedient for the sensor unit to have electrodes on the inside and / or outside using thin-film or thick-film technology.
  • the manufacturing costs can be kept very low.
  • the so-called dip-coating process from a sol is pointed out. This process is a wet chemical process for the production of ceramic thin layers that can be implemented very inexpensively. Attention is also drawn to EVD processes (electrochemical vapor deposition) and PVD processes (plasma vapor deposition).
  • the arrangement of the sensor unit essentially centrally in the inlet line, in particular an intake manifold.
  • the sensor-sensitive areas of the sensor unit can be easily positioned at locations of the greatest flow rates, which enables very precise measurements.
  • an outside sensor sensor sensitive area of the sensor unit in the flow direction of at least one of the pressurizing atmospheres has a greater extent than an inside sensor-sensitive area.
  • This requirement can be implemented, for example, by a cylindrical sensor unit, in which the sensor-sensitive area on the outside has a greater axial length than the sensor-sensitive area on the inside. In this way, an influence on an inside sensor-active material due to a backflow of an atmosphere acting on the outside of the sensor unit can be effectively avoided.
  • baffle plate in the area where the exhaust gas recirculation line opens into the inlet line.
  • FIG. 1 is a schematic side sectional view of a preferred embodiment of the inventive direction in which a sensor unit is applied to a carrier tube
  • FIG. 2 shows a schematic side view of the sensor unit according to FIG. 1 in a preferred positioning in an intake manifold
  • Fig. 3 shows a further preferred embodiment of the sensor unit according to the invention in a schematic side sectional view.
  • a sensor unit applied to a feed pipe 10 is denoted overall by 12.
  • the outside of the sensor unit 12 is designed as an outer electrode 12a or first sensor, and the inside as an inner electrode 12b or second sensor.
  • the respective electrodes are applied to a selectively ion-conducting material.
  • An evaluation device that is operatively connected to the sensor unit or its sensors is not shown.
  • the membranes applied on the inside and outside are selectively conductive with respect to an ionized gas occurring in the atmospheres to be considered, as will now be explained with reference to FIG. 2.
  • a manifold pipe in which the sensor unit according to the invention is arranged, is designated by 14.
  • the arrow P 1 indicates that fresh air (from the left in the illustration in FIG. 2) enters the manifold tube 14.
  • An exhaust gas recirculation line is designated 16, via which exhaust gases of an engine (not shown) can be returned to the intake tract or the manifold pipe 14. It can be seen that the recirculated exhaust gas (illustrated by arrow P3) via a first feed line 17a and a second feed line line 17b is introduced into the manifold tube 14.
  • the exhaust gas flowing in via the feed line 17b flows (in a mouth region 17c) against a baffle plate 18 and mixes with the fresh air flowing in here.
  • the sensor unit 12 is acted upon on the outside by a fresh air exhaust gas atmosphere and on the inside by an exhaust gas atmosphere.
  • the sensor device according to the invention can use any type of sensor.
  • resistive oxygen sensors amperometric oxygen sensors, amperometric NOX sensors and other gas sensors which are selective for a component present in the exhaust gas.
  • the sensor unit 12 is arranged essentially centrally in the elbow pipe 14. As a result of this measure, the outside of the sensor is subjected to the maximum flow rate of the fresh air exhaust gas flow, which effectively reduces the response time of the sensor unit.
  • a preferred embodiment of the sensor unit according to the invention is finally described with reference to FIG. 3.
  • the sensor-sensitive area of the inner electrode 12b is axial with respect to the outer electrode 12a, i.e. in Main direction of extension of the sensor unit 12 or in the flow direction P4, shortened. This ensures that the fresh air / exhaust gas mixture flowing back into the interior of the sensor unit does not influence the measurement result.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

L'invention concerne un dispositif servant à déterminer le taux de recyclage des gaz d'échappement d'un moteur à combustion interne et comprenant une unité capteur qui peut être sollicitée, dans une première zone, par une atmosphère de gaz d'échappement dans une conduite de recyclage des gaz d'échappement et, dans une deuxième zone, par une atmosphère gaz d'échappement/air frais dans une conduite d'admission du moteur à combustion interne en aval d'une entrée de la conduite de recyclage des gaz d'échappement. Le dispositif selon l'invention est caractérisé en ce que l'unité capteur est tubulaire, en ce qu'un côté intérieur de l'unité capteur peut être sollicité par l'atmosphère de gaz d'échappement et en ce qu'un côté extérieur de l'unité capteur peut être sollicité par l'atmosphère gaz d'échappement/air frais, ou inversement.
EP03764934A 2002-07-23 2003-07-02 Dispositif pour determiner le taux de recyclage des gaz d'echappement d'un moteur a combustion interne Withdrawn EP1525386A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10233362 2002-07-23
DE10233362A DE10233362A1 (de) 2002-07-23 2002-07-23 Vorrichtung zur Bestimmung der Abgasrückführungsrate einer Brennkraftmaschine
PCT/EP2003/007031 WO2004009981A2 (fr) 2002-07-23 2003-07-02 Dispositif pour determiner le taux de recyclage des gaz d'echappement d'un moteur a combustion interne

Publications (1)

Publication Number Publication Date
EP1525386A2 true EP1525386A2 (fr) 2005-04-27

Family

ID=30128264

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03764934A Withdrawn EP1525386A2 (fr) 2002-07-23 2003-07-02 Dispositif pour determiner le taux de recyclage des gaz d'echappement d'un moteur a combustion interne

Country Status (5)

Country Link
US (1) US7100431B2 (fr)
EP (1) EP1525386A2 (fr)
JP (1) JP2005533957A (fr)
DE (1) DE10233362A1 (fr)
WO (1) WO2004009981A2 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090084193A1 (en) * 2007-09-27 2009-04-02 Victor Cerabone Apparatus for measuring an exhaust gas recirculation flow of an internal combustion engine
DE102010007154B4 (de) * 2010-02-05 2018-05-03 Continental Automotive Gmbh Strömungsleitvorrichtung
US8528530B2 (en) 2010-06-30 2013-09-10 General Electric Company Diesel engine system and control method for a diesel engine system
US9976499B2 (en) 2010-09-23 2018-05-22 General Electric Company Engine system and method
US20140150528A1 (en) * 2012-11-30 2014-06-05 Engine Control and Monitoring Simplified method for measuring concentration of various exhaust gas mixture components utilizing dissimilar sensors
US20140216131A1 (en) * 2013-02-04 2014-08-07 Engine Control and Monitoring Simplified method for measuring concentrations of exhaust gas components utilizing differential measurement across an absorber
US20140216130A1 (en) * 2013-02-04 2014-08-07 Engine Control and Monitoring Simplified method for measuring concentrations of exhaust gas components
JP6677202B2 (ja) * 2017-03-28 2020-04-08 トヨタ自動車株式会社 インテークマニホールド
DE102018203327A1 (de) * 2018-03-06 2019-09-12 Bayerische Motoren Werke Aktiengesellschaft Brennkraftmaschine mit einer Abgasrückführeinrichtung

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JP3375645B2 (ja) * 1991-05-14 2003-02-10 株式会社日立製作所 内燃機関の制御装置
US5203313A (en) 1992-06-19 1993-04-20 Bundy Corporation EGR venturi coupler
DE19734494C1 (de) 1997-08-08 1998-10-08 Daimler Benz Ag Verfahren zum Betrieb einer Brennkraftmaschine
US5996337A (en) * 1998-02-06 1999-12-07 Engelhard Corporation Dynamic calorimetric sensor system
US6824661B2 (en) * 1999-09-23 2004-11-30 Ceramphysics, Inc. Combined oxygen and NOx sensor
DE10007010C2 (de) * 2000-02-16 2003-04-17 Daimler Chrysler Ag Sensoreinheit zur Bestimmung der Abgasrückführungsrate einer Brennkraftmaschine
IT1319919B1 (it) * 2000-02-25 2003-11-12 Iveco Fiat Collettore di aspirazione per un motore endotermico.
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Title
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Also Published As

Publication number Publication date
JP2005533957A (ja) 2005-11-10
WO2004009981A3 (fr) 2004-07-08
US20050145022A1 (en) 2005-07-07
US7100431B2 (en) 2006-09-05
DE10233362A1 (de) 2004-02-12
WO2004009981A2 (fr) 2004-01-29

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