WO2011117108A1 - Procédé pour tester la fonctionnalité d'une soupape de recyclage des gaz d'échappement d'un moteur à combustion interne - Google Patents

Procédé pour tester la fonctionnalité d'une soupape de recyclage des gaz d'échappement d'un moteur à combustion interne Download PDF

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Publication number
WO2011117108A1
WO2011117108A1 PCT/EP2011/053871 EP2011053871W WO2011117108A1 WO 2011117108 A1 WO2011117108 A1 WO 2011117108A1 EP 2011053871 W EP2011053871 W EP 2011053871W WO 2011117108 A1 WO2011117108 A1 WO 2011117108A1
Authority
WO
WIPO (PCT)
Prior art keywords
exhaust gas
signal
gas recirculation
measurement signal
recirculation valve
Prior art date
Application number
PCT/EP2011/053871
Other languages
German (de)
English (en)
Inventor
Thomas Breitbach
Jens Pawlak
Original Assignee
Robert Bosch 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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Priority to CN201180015142.XA priority Critical patent/CN102791995B/zh
Priority to RU2012145008/07A priority patent/RU2560091C2/ru
Priority to BR112012024042-0A priority patent/BR112012024042B1/pt
Publication of WO2011117108A1 publication Critical patent/WO2011117108A1/fr

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]
    • F02D41/005—Controlling exhaust gas recirculation [EGR] according to engine operating conditions
    • F02D41/0055—Special engine operating conditions, e.g. for regeneration of exhaust gas treatment apparatus
    • 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
    • F02B75/00—Other engines
    • F02B75/12—Other methods of operation
    • F02B2075/125—Direct injection in the combustion chamber for spark ignition engines, i.e. not in pre-combustion chamber
    • 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
    • F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
    • F02D41/26—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using computer, e.g. microprocessor
    • F02D41/28—Interface circuits
    • F02D2041/286—Interface circuits comprising means for signal processing
    • F02D2041/288—Interface circuits comprising means for signal processing for performing a transformation into the frequency domain, e.g. Fourier transformation
    • 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
    • F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
    • F02D41/1408—Dithering techniques
    • 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
    • F02M26/49—Detecting, diagnosing or indicating an abnormal function of the EGR 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
    • 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
    • F02M35/1038—Sensors for intake systems for temperature or pressure
    • 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
    • F02M35/10386—Sensors for intake systems for flow rate
    • 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 method for testing the functionality of an exhaust gas recirculation valve of an internal combustion engine.
  • Exhaust gas recirculation (EGR) valves are used in internal combustion engines to produce a mixture of fresh air and recirculated exhaust gas in the intake manifold and so to improve the combustion behavior, in particular with regard to a consumption and emission minimization.
  • the exhaust gas recirculation reduces the NOx emission.
  • a continuously adjustable exhaust gas recirculation valve is used and its open position regulated.
  • the invention is based on the measure of applying a periodically modulated signal to the actuator of an EGR valve and influencing a system output influenced by it, e.g. the signal of the boost pressure
  • the method is applicable in wide operating ranges of the engine, in particular both stationary and dynamic, and can thus meet the requirement of a continuous diagnosis.
  • the proposed concept can get along with already existing sensors and actuators, which are installed as standard in the vehicle, so that no additional costs for other sensors or actuators or ECU hardware arise.
  • the functionality of the exhaust gas recirculation valve can be checked at any time. With a small modulation of the control signal, the soot / NOx ratio can be considered approximately as linear, so that the method has no influence on the total emission.
  • the method thus basically intervenes in the EGR control, there is nevertheless no appreciable influence on the emission, which makes the invention particularly well applicable in practice.
  • the invention is suitable for internal combustion engines with self-ignition or spark ignition.
  • a periodic control signal a sinusoidal signal or a rectangular signal can be used.
  • a square wave signal is better reproducible at a lower sampling rate than a sine wave signal of the same frequency.
  • any periodic signal is suitable for modulation.
  • a Fourier analysis or a lock-in method can be used.
  • the additional advantage of a phase-sensitive method, in particular a lock-in method is that it directly measures the characteristic of the controlled system as a function of the position of the actuator can be. In order to assess the functionality, it is then only necessary to monitor a characteristic gradient with regard to predetermined threshold values. This can be in addition to a stiffness of the EGR valve and any change in the control path characteristic, for example, by aging of return springs, sooting of the valve, manipulation u.ä. recognize reliably.
  • An arithmetic unit according to the invention e.g. a control device of a motor vehicle is, in particular programmatically, configured to perform a method according to the invention.
  • FIG. 1 shows a schematic representation of an internal combustion engine with a control unit.
  • FIG. 2 schematically shows a flowchart of different alternatives of a preferred embodiment of a method according to the invention.
  • FIG. 1 shows an internal combustion engine 1 in which a piston 2 can be moved up and down in a cylinder 3.
  • the cylinder 3 is provided with a combustion chamber 4, to which via valves 5, an intake pipe 6 and an exhaust pipe 7 are connected.
  • the intake pipe 6 is connected to the exhaust pipe 7 via an exhaust gas recirculation valve 13 with a valve flap 13a as an actuator for external exhaust gas recirculation.
  • the valve flap 13a can be controlled by a signal (EGR) from a control unit (ECU) 16.
  • the valve flap 13a can be controlled by a signal (EGR) from a control unit (ECU) 16.
  • the valve flap 13a can be controlled by a signal (EGR) from a control unit (ECU) 16.
  • ECU control
  • a boost pressure sensor 18 which outputs a signal LD indicating the boost pressure in the intake manifold, and a throttle valve 12 whose rotational position is adjustable by means of a signal DK housed.
  • the turbocharger compressor would be arranged in turbocharged engines.
  • the intake pipe 6 is further provided with an air mass sensor 10 and the exhaust pipe 7 with a lambda sensor 1 1.
  • the air mass sensor 10 measures the air mass of the fresh air supplied to the intake pipe 6 and generates a signal LM in response thereto.
  • the lambda sensor 1 1 measures the oxygen content of the exhaust gas in the exhaust pipe 7 and generates a signal lambda ( ⁇ ) in dependence thereon.
  • the lambda probe 11 is an exhaust system (not shown) including a catalytic converter, for example a 3-way catalytic converter, followed by. In the case of turbocharged engines, the turbine of a turbocharger would be installed after the lambda probe.
  • a crankshaft 14 is rotated by the driven piston, which ultimately drives the wheels of the motor vehicle.
  • an internal combustion engine with external or self-ignition may have more than one cylinder, which are assigned to the same crankshaft and the same exhaust pipe and form an exhaust bank.
  • the valve flap 13a are controlled modulated by the control unit 16 and, for example, the charge pressure LD and / or the air mass LM evaluated.
  • the control unit 16 is provided with a microprocessor which has stored in a storage medium, in particular in a read only memory (ROM), a program which is adapted to perform the entire control and / or regulation of the internal combustion engine 1.
  • the control unit 16 is set up to carry out a method according to the invention.
  • the control unit 16 is acted upon by input signals representing operating variables of the internal combustion engine measured by means of sensors.
  • the control unit 16 with the air mass sensor 10, the lambda sensor 1 1 and the boost pressure sensor 18 is connected.
  • the control unit 16 is connected to an accelerator pedal sensor 17, which generates a signal FP, which indicates the position of a driver-actuated accelerator pedal and thus the torque requested by the driver.
  • the control unit 16 generates output signals with which the behavior of the internal combustion engine 1 can be influenced in accordance with the desired control and / or regulation via actuators.
  • the control unit 16 is connected to the EGR valve 13, the injection valve 8, the spark plug 9 and the throttle valve 12 and generates the signals required for their control EGR, Tl, ZW and DK.
  • the course of several preferred alternatives of a method according to the invention will be explained below with reference to FIG. These embodiments may be based on an internal combustion engine according to FIG.
  • the illustrated steps do not necessarily take place one after the other, but can also take place parallel in time.
  • the method begins in an optional step 101, in which the presence of corresponding release conditions is checked and the functionality check or diagnosis method is started if necessary.
  • the actuator 13a of the EGR valve 13 is excited with a periodic signal having a predetermined amplitude and frequency, ie, a modulation signal is superimposed on the normal actuating signal.
  • the modulation signal may preferably be sinusoidal in accordance with 103a or rectangular in accordance with 103b. It should be understood, however, that in principle any periodic signal may be used for modulation.
  • a system variable influenced by the setting movement or position of the actuator or actuator 13a is measured, wherein it is expedient according to 105a to the measurement signal LM of an air mass meter 10, for example a hot-film air mass meter, or according to 105b the measurement signal LD of a boost pressure sensor 18 can act. It should also be clarified here that in principle any system size can be measured, which is influenced by the adjusting movement of the actuator 13a.
  • a moving average value of the measurement signal is calculated by means of low-pass filtering and this is subtracted from the original measurement signal in a step 107 in order to increase the robustness of the diagnosis.
  • the subtraction result is evaluated as a new measurement signal, whereby according to 108a a Fourier analysis or according to 108b a phase-sensitive lock-in method is offered.
  • the Fourier analysis according to 108a the Fourier spectrum is examined for the occurrence of the excitation frequency with a significantly higher amplitude than adjacent amplitudes. This can be done using a threshold comparison.
  • the measured characteristic gradient is compared with a predetermined characteristic gradient. This can also be done using a threshold comparison.
  • the modulation frequency is expediently detected selectively in the measurement signal. Due to the fixed phase relationship between modulation and measuring signal, this can be a very good
  • a symptom formation is performed on the basis of the respective comparison result (for example the integration of relevant frequencies over specific time intervals or other types of symptom formation) and finally in a step 1 10 a symptom evaluation or error detection is performed.
  • This evaluation is made e.g. by a comparison (larger / smaller / the same) with an application-specific threshold value or a difference formation (sign of the result), in order to conclude the intact or error case.
  • a faulty or intact exhaust gas recirculation valve can be detected.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Testing Of Engines (AREA)

Abstract

La présente invention concerne un procédé pour tester la fonctionnalité d'une soupape (13) de recyclage des gaz d'échappement d'un moteur (1) à combustion interne, selon lequel la position d'un élément (13a) de réglage de la soupape (13) de recyclage des gaz d'échappement est modifiée de manière périodique, une grandeur (LM, LD) de système influencée par le mouvement de l'élément (13a) de réglage est mesurée et le signal de mesure pour tester la fonctionnalité de la soupape (13) de recyclage des gaz d'échappement est évalué.
PCT/EP2011/053871 2010-03-24 2011-03-15 Procédé pour tester la fonctionnalité d'une soupape de recyclage des gaz d'échappement d'un moteur à combustion interne WO2011117108A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201180015142.XA CN102791995B (zh) 2010-03-24 2011-03-15 用于检查内燃机的废气再循环阀的功能的方法
RU2012145008/07A RU2560091C2 (ru) 2010-03-24 2011-03-15 Способ проверки функциональности клапана рециркуляции отработавших газов двигателя внутреннего сгорания
BR112012024042-0A BR112012024042B1 (pt) 2010-03-24 2011-03-15 Processo para testar a funcionalidade de uma válvula de recirculação de gás de escape de um motor de combustão e unidade de cálculo

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010003203A DE102010003203A1 (de) 2010-03-24 2010-03-24 Verfahren zum Prüfen der Funktionalität eines Abgasrückführventils einer Brennkraftmaschine
DE102010003203.4 2010-03-24

Publications (1)

Publication Number Publication Date
WO2011117108A1 true WO2011117108A1 (fr) 2011-09-29

Family

ID=43799450

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/053871 WO2011117108A1 (fr) 2010-03-24 2011-03-15 Procédé pour tester la fonctionnalité d'une soupape de recyclage des gaz d'échappement d'un moteur à combustion interne

Country Status (5)

Country Link
CN (1) CN102791995B (fr)
BR (1) BR112012024042B1 (fr)
DE (1) DE102010003203A1 (fr)
RU (1) RU2560091C2 (fr)
WO (1) WO2011117108A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10704506B2 (en) 2018-01-22 2020-07-07 Ford Global Technologies, Llc Methods and systems for EGR valve diagnostics
US10941735B2 (en) 2018-01-22 2021-03-09 Ford Global Technologies, Llc Methods and systems for an exhaust-gas recirculation valve

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3511558B1 (fr) * 2016-09-07 2020-05-13 Nissan Motor Co., Ltd. Procédé et dispositif de commande de moteur
DE102016219781A1 (de) * 2016-10-12 2018-04-12 Robert Bosch Gmbh Verfahren und Steuergerät zum Abgleich und zur Diagnose eines Abgasrückführmassenstrommessers
CN112539121B (zh) * 2020-11-27 2022-03-01 潍柴动力股份有限公司 一种egr系统的积碳在线检测方法、检测装置及机动车

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US5508926A (en) * 1994-06-24 1996-04-16 General Motors Corporation Exhaust gas recirculation diagnostic
US5996337A (en) * 1998-02-06 1999-12-07 Engelhard Corporation Dynamic calorimetric sensor system
DE10025133A1 (de) * 2000-05-20 2001-12-06 Volkswagen Ag Verfahren zum Überprüfen eines Abgasrückführungssystems
DE10225285A1 (de) * 2001-06-13 2002-12-19 Luk Lamellen & Kupplungsbau Verfahren und ein System zum Regeln des Drehmomentübertragungsvermögens einer reibschlüssig Drehmoment übertragenden Baugruppe
DE102005002540A1 (de) * 2004-01-20 2005-08-04 Honda Motor Co., Ltd. Leckdetektionsvorrichtung für ein Abgasrückführungssystem eines Motors
EP2014946A2 (fr) * 2007-07-12 2009-01-14 LuK Lamellen und Kupplungsbau Beteiligungs KG Procédé de détermination par point de palpage d'un embrayage automatisé
DE102009027010A1 (de) * 2009-06-18 2010-12-23 Robert Bosch Gmbh Verfahren zur Diagnose eines Aktors eines Ladedrucksystems einer Brennkraftmaschine

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DE4406281C2 (de) * 1993-03-01 1996-08-22 Mitsubishi Motors Corp Verfahren zum Bestimmen eines Ausfalls einer Vorrichtung zur Abgasrückführung
CN100398793C (zh) * 2003-04-16 2008-07-02 韦斯特波特动力股份有限公司 具有气体燃料喷射的内燃机
JP4487887B2 (ja) * 2005-09-02 2010-06-23 トヨタ自動車株式会社 内燃機関のバルブ制御装置
FR2919671B1 (fr) * 2007-08-03 2009-10-30 Sphere Tech Europ Sarl Procede de diagnostic d'un moteur a combustion interne par analyse des gaz d'echappement et dispositif de mise en oeuvre.
JP2009221992A (ja) * 2008-03-17 2009-10-01 Denso Corp 排出ガスセンサの異常診断装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5508926A (en) * 1994-06-24 1996-04-16 General Motors Corporation Exhaust gas recirculation diagnostic
US5996337A (en) * 1998-02-06 1999-12-07 Engelhard Corporation Dynamic calorimetric sensor system
DE10025133A1 (de) * 2000-05-20 2001-12-06 Volkswagen Ag Verfahren zum Überprüfen eines Abgasrückführungssystems
DE10225285A1 (de) * 2001-06-13 2002-12-19 Luk Lamellen & Kupplungsbau Verfahren und ein System zum Regeln des Drehmomentübertragungsvermögens einer reibschlüssig Drehmoment übertragenden Baugruppe
DE102005002540A1 (de) * 2004-01-20 2005-08-04 Honda Motor Co., Ltd. Leckdetektionsvorrichtung für ein Abgasrückführungssystem eines Motors
EP2014946A2 (fr) * 2007-07-12 2009-01-14 LuK Lamellen und Kupplungsbau Beteiligungs KG Procédé de détermination par point de palpage d'un embrayage automatisé
DE102009027010A1 (de) * 2009-06-18 2010-12-23 Robert Bosch Gmbh Verfahren zur Diagnose eines Aktors eines Ladedrucksystems einer Brennkraftmaschine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10704506B2 (en) 2018-01-22 2020-07-07 Ford Global Technologies, Llc Methods and systems for EGR valve diagnostics
US10941735B2 (en) 2018-01-22 2021-03-09 Ford Global Technologies, Llc Methods and systems for an exhaust-gas recirculation valve

Also Published As

Publication number Publication date
RU2012145008A (ru) 2014-05-10
RU2560091C2 (ru) 2015-08-20
CN102791995B (zh) 2016-03-30
BR112012024042B1 (pt) 2020-09-29
DE102010003203A1 (de) 2011-09-29
CN102791995A (zh) 2012-11-21
BR112012024042A2 (pt) 2016-08-30

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