EP2344743A1 - Procede de verification de la capacite de fonctionnement d'au moins un injecteur - Google Patents

Procede de verification de la capacite de fonctionnement d'au moins un injecteur

Info

Publication number
EP2344743A1
EP2344743A1 EP09783623A EP09783623A EP2344743A1 EP 2344743 A1 EP2344743 A1 EP 2344743A1 EP 09783623 A EP09783623 A EP 09783623A EP 09783623 A EP09783623 A EP 09783623A EP 2344743 A1 EP2344743 A1 EP 2344743A1
Authority
EP
European Patent Office
Prior art keywords
lambda probe
injection valve
lambda
operating condition
signal
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Withdrawn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
EP09783623A
Other languages
German (de)
English (en)
Inventor
Johannes Zeidler
Steffen Peischl
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.)
Robert Bosch GmbH
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
Publication of EP2344743A1 publication Critical patent/EP2344743A1/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Withdrawn legal-status Critical Current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
    • F02D41/22—Safety or indicating devices for abnormal conditions
    • F02D41/221—Safety or indicating devices for abnormal conditions relating to the failure of actuators or electrically driven elements
    • 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 invention relates to a method for checking the functionality of at least one injection valve, a device for checking the functionality of at least one injection valve, a computer program and a computer program product.
  • Components is a high depth of diagnosis coupled with a fast and successful one
  • injectors For injecting the fuel into the internal combustion engine, so-called injectors are used in the diesel engine. Due to wear such injectors can be leaking at the injector, so that uncontrolled fuel can get into the combustion chamber. The leak usually occurs only in certain operating points of the injector.
  • lambda sensors For monitoring and control of internal combustion engines used in motor vehicles in operation, among other things, so-called lambda sensors are used as sensors, which contribute to improving the exhaust gas quality of motor vehicles. Such sensors are based on a known electrochemical measurement of the oxygen concentration in the exhaust gas.
  • a defect of the fuel metering system is detected when a signal provided by a sensor for an exhaust gas composition deviates from a predefinable value.
  • the sensor can deliver a signal that depends on the oxygen concentration in the exhaust gas.
  • the defect is detected when the signal for the exhaust gas composition deviates from a predefinable threshold value.
  • the invention relates to a method for checking the functionality of at least one injection valve of an internal combustion engine, in which first the functionality of a lambda probe, which is designed to determine a state of the at least one injection valve, is checked.
  • a stationary operating condition is set for the internal combustion engine and checks whether at least one signal of the lambda probe for the set operating condition is stable.
  • a lambda value for the at least one injection valve of the internal combustion engine is measured with the lambda probe at the set operating condition.
  • a check of the functionality of the lambda probe is made. This measure can be carried out several times in succession. If, during operation of the internal combustion engine by a control unit that monitors this operation, an error is detected, as part of a diagnosis of the error, eg. In a workshop, a separation and thus a clear assignment of the error to the at least one injection valve or the Lambda probe, with which an operation of the at least one injection valve is to be monitored, take place.
  • the invention relates, inter alia, to checking the functionality of at least one component of two components of an internal combustion engine, namely the lambda probe as the first component and the at least one injection valve as a second component.
  • An examination of the at least one injection valve to be carried out with the lambda probe is carried out on the condition that it is ensured that the lambda probe functions and is suitable for carrying out the examination.
  • the functionality of the lambda probe is checked at least a second time.
  • a stationary operating condition is set again for the internal combustion engine and checks whether at least one signal of the lambda probe is stable for the set operating condition, wherein, depending on whether the signal of the lambda probe is stable, with the lambda probe at the set operating condition again a lambda value for the at least one injection valve is measured.
  • the first and the at least one second check of the functionality of the lambda probe can be performed under the same steady-state operating condition or at various stationary conditions
  • At least one lambda value measured for the at least one injection valve can be evaluated. If several test cycles are carried out in succession, the lambda values measured for the at least one injection valve can be compared with one another.
  • the signal of the lambda probe it is checked whether the signal of the lambda probe reaches a target value stably.
  • a decision as to whether the lambda probe is functional and therefore suitable for detecting meaningful lambda values for the at least one injection valve is made as a function of the stability of the signal of the lambda probe.
  • the signal is stable in the embodiment when fluctuations of values of the signal lie within a predetermined tolerance.
  • Such a tolerance can take place as a function of a design of the lambda probe or of the respectively set operating condition, which may include at least one operating point.
  • the tolerance provided for verifying the stability of the signal may be above target values intended for the
  • a coasting operation of the internal combustion engine can be set.
  • the engine of the vehicle is moved or driven with the drive train closed.
  • kinetic energy of the rotating wheels of the vehicle is transmitted to the engine.
  • the fuel supply can be interrupted during overrun.
  • predetermined operating points are set for setting an operating condition for a number of components of the internal combustion engine.
  • the invention further relates to a device for checking the functionality of at least one injection valve of an internal combustion engine, which is designed to first check the functionality of a lambda probe, which is designed to determine a state of the at least one injection valve.
  • the device comprises a control unit which is designed to set a stationary operating condition for the internal combustion engine.
  • the device comprises an evaluation unit, which is designed to check whether at least one signal of the lambda probe is stable for the set operating condition.
  • the device is designed to measure a lambda value for the at least one injection valve with the lambda probe in the set operating condition, depending on whether the signal of the lambda probe is stable.
  • the evaluation unit of the device can be determined that the lambda probe is not functional, if the signal of the lambda probe is not stable.
  • Analog can be determined with the evaluation that the lambda probe is functional if the signal of the lambda probe is stable.
  • the oxygen partial pressure in the exhaust gas of the internal combustion engine is detected by means of a broadband lambda probe under different operating conditions and evaluated in a control and evaluation unit of the device.
  • Injector leakage without an error detection possible due to fault of the lambda probe.
  • errors of an injector or the at least one injection valve or a fuel injection nozzle and the lambda probe can be distinguished from one another and therefore separated or be separated.
  • a diagnostic separation between a nozzle leakage in common rail injectors and lambda probe errors is possible.
  • the diagnostic method performed by the proposed method and / or by the proposed device is designed such that this misdetection is avoided by separating between lambda probe errors and fuel injector leaks.
  • subjective assessment criteria are avoided, resulting in a high reproducibility of the diagnosis.
  • misdiagnoses are avoided and an actual cause of the error can be clearly attributed to the corresponding components, i. H. the fuel injector or the lambda probe, so that an expansion of the components to be diagnosed can be avoided.
  • the device described is designed to perform all steps of the presented method. In this case, individual steps of this method can also be carried out by individual components of the device. Furthermore, functions of
  • Device or functions of individual components of the device can be implemented as steps of the method.
  • steps of the method it is possible for steps of the method to be implemented as functions of individual components of the device or of the device.
  • the oxygen partial pressure in the exhaust gas is used for diagnosis
  • the lambda value is measured after a certain waiting time. Thereafter, another suitable operating point is given again, and after a certain waiting time, the lambda value is measured again. Subsequently, the two measured lambda values are evaluated.
  • suitable operating conditions can be concluded, for example, based on the evaluation of the two measured lambda values on a leakage of the nozzles of the fuel injectors, but this is only possible with intact lambda probe.
  • relevant actuators are set to fixed predefined values for operating conditions throughout the entire process.
  • a suitable operating point of the internal combustion engine is specified.
  • an operating point without injections is selected; in one embodiment, the so-called push operation is provided for this purpose.
  • Lambda value measured This principle is also applied in the second operating condition or at the second operating point. Subsequently, the two measured lambda values are evaluated. Due to the above-mentioned choice of suitable operating conditions can be concluded based on the evaluation of the two measured lambda values on a leakage of the nozzles of the fuel injectors. If, on the other hand, the two signals of the lambda probe do not reach stable values, then instead an error of the lambda probe is concluded, which, for example, can be based on a dynamic problem.
  • the invention further relates to a computer program with program code means to perform all steps of a described method, when the computer program on a
  • Computer or a corresponding processing unit, in particular in a device according to the invention, is executed.
  • the computer program product according to the invention with program code means which are stored on a computer-readable data carrier is designed to carry out all the steps of a described method when the computer program is executed on a computer or a corresponding computing unit, in particular in a device according to the invention.
  • Figure 1 shows a schematic representation of an arrangement with an embodiment of a device according to the invention.
  • FIG. 2 shows a flow chart for an embodiment of the method according to the invention.
  • FIG. 1 shows a schematic representation of an embodiment of a device 2 according to the invention for diagnosing nozzle leakage in an injection valve 10 or a fuel injector of an internal combustion engine.
  • This device 2 comprises a control unit 4 and an evaluation unit 6.
  • Figure 1 shows a schematic representation of an embodiment of an internal combustion engine 8, in which case an injection valve 10 of this internal combustion engine 8 is shown.
  • a lambda probe 12 the the
  • This lambda probe 12 is designed to determine or measure a lambda value or a fuel / air ratio of exhaust gases 14 of the injection valve 10 of the internal combustion engine 8.
  • at least one test cycle is carried out, in which first a functionality of the lambda probe 12 and depending on whether the lambda probe 12 is functional, a functionality of the injection valve 10 is performed.
  • the lambda probe 12 can also be used to check the functionality for a plurality of injection valves 10.
  • a stationary operating condition which comprises at least one stationary operating point, is predetermined by the control unit 4 for the internal combustion engine 8, so that the internal combustion engine 8 is operated under this operating condition.
  • Operating condition is determined by the evaluation unit 6, whether a provided by the lambda probe 12 signal is stable, ie only varies in a tolerance condition defined by operating conditions.
  • Lambda probe 12 has an error. If the signal is stable, it is assumed that the lambda probe 12 is functional. Thereafter, under the same operating condition by the lambda probe 12, a measurement of a lambda value of the exhaust gases 14 of the injection valve 10, with which an oxygen partial pressure of the exhaust gases 14 is determined. By analyzing the lambda value by the evaluation unit 6 is to determine whether the injection valve 10 is functional.
  • a sequence of an embodiment of the method according to the invention is shown schematically in the diagram of FIG.
  • the method comprises two operating cycles 20, 22 to be carried out in succession.
  • an initial setting 24 and setting of a steady-state operating condition for the internal combustion engine 8 are performed.
  • a stability 26 of a signal of the lambda probe 12 which measures exhaust gases 14 of the injection nozzle 10 is determined. checked.
  • Lambda value If the signal is not stable, an error 30 of the lambda probe 12 is detected as part of an evaluation. If during the first operating cycle 20 results that the signal is stable, takes place after the measurement 28 of the lambda value at the beginning of the second test cycle 22, a default 32 and setting a steady-state operating condition for the internal combustion engine 8. Thereafter, again a stability 34 of a signal Lambda probe 12 checked.
  • Lambda values for the injection valve 10 is checked as to whether an error, in this case a so-called injector error, exists for the injection valve 10 or not.
  • the method may in one variant include more than just two cycles of operation 20, 22. Successive operating cycles 20, 22 may be performed under the same operating condition or under different operating conditions. At the beginning of each one
  • Operating cycle 20, 22 is set at the default 24, 32, the intended operating condition.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Abstract

L’invention concerne un procédé de vérification de la capacité de fonctionnement d’au moins un injecteur (10) d’un moteur à combustion interne (8), qui consiste à tout d’abord vérifier la capacité de fonctionnement d’une sonde lambda (12) qui est conçue pour déterminer un état du ou des injecteurs (10). Pour ce faire, on définit un mode de fonctionnement stationnaire pour le moteur à combustion interne (8) et on vérifie si au moins un signal de la sonde lambda (12) est stable dans le mode de fonctionnement défini. Si le signal de la sonde lambda (12) est stable, une valeur lambda est mesurée pour le ou les injecteurs (10) au moyen de la sonde lambda (12), dans le mode de fonctionnement défini.
EP09783623A 2008-10-06 2009-10-01 Procede de verification de la capacite de fonctionnement d'au moins un injecteur Withdrawn EP2344743A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008042605.9A DE102008042605B4 (de) 2008-10-06 2008-10-06 Verfahren zum Überprüfen der Funktionstüchtigkeit mindestens eines Einspritzventils
PCT/EP2009/062732 WO2010040676A1 (fr) 2008-10-06 2009-10-01 Procédé de vérification de la capacité de fonctionnement d’au moins un injecteur

Publications (1)

Publication Number Publication Date
EP2344743A1 true EP2344743A1 (fr) 2011-07-20

Family

ID=41559470

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09783623A Withdrawn EP2344743A1 (fr) 2008-10-06 2009-10-01 Procede de verification de la capacite de fonctionnement d'au moins un injecteur

Country Status (5)

Country Link
US (1) US8650941B2 (fr)
EP (1) EP2344743A1 (fr)
CN (1) CN102171431B (fr)
DE (1) DE102008042605B4 (fr)
WO (1) WO2010040676A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009026848A1 (de) 2009-06-09 2010-12-16 Robert Bosch Gmbh Verfahren zur Detektion einer Leckage
DE102015206912B4 (de) 2015-04-16 2023-01-26 Bayerische Motoren Werke Aktiengesellschaft Verfahren und Steuervorrichtung zur Detektion einer Leckage mindestens eines Kraftstoff-Injektors einer Brennkraftmaschine
US10330040B2 (en) * 2016-06-14 2019-06-25 Ford Global Technologies, Llc Method and system for air-fuel ratio control
CN106017898A (zh) * 2016-07-04 2016-10-12 重庆重客汽车电子有限公司 车用燃气喷射阀高精度性能测试仪
DE102020203628A1 (de) 2020-03-20 2021-09-23 Robert Bosch Gesellschaft mit beschränkter Haftung Verfahren zum Erkennen von Leckagen in Einspritzventilen

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4243493A1 (de) * 1992-12-22 1994-06-23 Bosch Gmbh Robert Verfahren und Vorrichtung zur Überwachung einer Steuereinrichtung
WO2004040104A1 (fr) * 2002-10-23 2004-05-13 Robert Bosch Gmbh Procede permettant de controler au moins trois capteurs destines a detecter une grandeur de mesure relative a un moteur a combustion

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19620038B4 (de) 1996-05-17 2007-08-23 Robert Bosch Gmbh Verfahren und Vorrichtung zur Überwachung eines Kraftstoffzumeßsystems
DE102004028515B3 (de) 2004-06-11 2005-11-24 Siemens Ag Verfahren und Vorrichtung zum Überwachen einer Kraftstoffzuführeinrichtung einer Brennkraftmaschine
DE102005008180A1 (de) * 2005-02-23 2006-08-31 Robert Bosch Gmbh Verfahren und Vorrichtung zur Überwachung einer Einspritzvorrichtung einer Brennkraftmaschine
DE102005029137B3 (de) * 2005-06-23 2007-02-15 Dr.Ing.H.C. F. Porsche Ag Verfahren und Steuergerät zur Diagnose eines Gaswechsel-Ventilhub-Verstellsystems eines Verbrennungsmotors
DE102006059675A1 (de) 2006-12-18 2008-06-19 Robert Bosch Gmbh Verfahren und Vorrichtung zur Erkennung eines kontinuierlichen Kraftstoffeintrags in das Schmieröl einer Brennkraftmaschine beim Kaltstart
DE102007007815B4 (de) * 2007-02-16 2009-04-09 Bayerische Motoren Werke Aktiengesellschaft Verfahren und Vorrichtung zum Betreiben einer Brennkraftmaschine
US8146562B2 (en) * 2009-11-13 2012-04-03 Cummins Inc. System, method and apparatus for fuel injector diagnostics

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4243493A1 (de) * 1992-12-22 1994-06-23 Bosch Gmbh Robert Verfahren und Vorrichtung zur Überwachung einer Steuereinrichtung
WO2004040104A1 (fr) * 2002-10-23 2004-05-13 Robert Bosch Gmbh Procede permettant de controler au moins trois capteurs destines a detecter une grandeur de mesure relative a un moteur a combustion

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2010040676A1 *

Also Published As

Publication number Publication date
US20110259094A1 (en) 2011-10-27
DE102008042605A1 (de) 2010-05-27
WO2010040676A1 (fr) 2010-04-15
US8650941B2 (en) 2014-02-18
DE102008042605B4 (de) 2019-12-05
CN102171431B (zh) 2013-11-06
CN102171431A (zh) 2011-08-31

Similar Documents

Publication Publication Date Title
DE102008042605B4 (de) Verfahren zum Überprüfen der Funktionstüchtigkeit mindestens eines Einspritzventils
DE102009028374A1 (de) Verfahren und Vorrichtung zur Adaption und/oder Diagnose eines in einem Hybridfahrzeug angeordneten Verbrennungsmotors
DE102005049069A1 (de) Verfahren und Vorrichtung zum Betreiben einer Brennkraftmaschine
WO2017021183A1 (fr) Procédé de détection de composants défectueux dans un système d'injection de carburant
WO2008080725A1 (fr) Dispositif de diagnostic des défauts de fonctionnement d'un moteur à combustion interne
EP2210239B1 (fr) Procédé pour enregistrer des informations
DE19540826A1 (de) Verfahren zur zylinderindividuellen Fehlfunktionserkennung bei einer Brennkraftmaschine
DE102011081634A1 (de) Verfahren und Vorrichtung zur Diagnose eines Fehlers in einem Abgasrückführungssystem
DE102013220814B3 (de) Diagnoseverfahren und Diagnoseeinrichtung zum Erkennen eines defekten Kraftstoffinjektors einer Verbrennungskraftmaschine
EP3759326B1 (fr) Procédé de diagnostic permettant de détecter un saut d'une quantité de mesure continue, commande pour la mise en oeuvre de ce procédé
WO2021185501A1 (fr) Procédé de détection de fuites dans des soupapes d'injection
AT518446A1 (de) Verfahren zur Überprüfung der NOx-Emissionen eines Fahrzeugs
DE102010025177B4 (de) Diagnoseverfahren und Diagnosesystem zur Erkennung von Leckageströmen in Kraftfahrzeug-Hochdruckeinspritzanlagen
DE102005024393A1 (de) Verfahren zur Dichtheitsprüfung eines Einspritzsystems einer Brennkraftmaschine
DE102008031696B4 (de) Vorrichtung zur Erkennung eines Verbrennungsaussetzers einer Brennkraftmaschine
DE102005004741A1 (de) Verfahren und Vorrichtung zur Diagnose von Sensoren einer Luftzuführung einer Brennkraftmaschine
DE10040254B4 (de) Verfahren zur Diagnose einer Komponente einer Brennkraftmaschine
DE102006016894A1 (de) Verfahren und Vorrichtung zum Betreiben einer Antriebseinheit und Testvorrichtung zum Testen einer Antriebseinheit
DE102009026848A1 (de) Verfahren zur Detektion einer Leckage
EP1014072B1 (fr) Procédé d'essai par comparaison de cylindres de moteurs à combustion interne à injection, en particulier de moteurs de véhicules
DE19930311C1 (de) Verfahren und Vorrichtung zum Bestimmen einer Betriebsstörung in einer Kraftstoffeinspritzanlage
DE102004053428B4 (de) Vorrichtung zur Überprüfung der in ein Kraftfahrzeug mit einer Brennkraftmaschine eingebauten Abgasanlage
DE102022112870A1 (de) Diagnoseverfahren zum Überprüfen der Funktionalität mindestens einer pneumatischen Ventilfeder
DE10222202A1 (de) Verfahren und Vorrichtung zum Überwachen der Funktion mindestens zweier Impulslader
DE102020205491A1 (de) Verfahren, Vorrichtung, Computerprogramm und computerlesbares Medium zum Identifizieren eines Produktfehlers eines Produkts

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20110506

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

AX Request for extension of the european patent

Extension state: AL BA RS

DAX Request for extension of the european patent (deleted)
17Q First examination report despatched

Effective date: 20160623

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

INTG Intention to grant announced

Effective date: 20170829

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20180109