EP0466849A1 - Procede d'attribution de defauts de combustion a un cylindre de moteur a combustion interne - Google Patents

Procede d'attribution de defauts de combustion a un cylindre de moteur a combustion interne

Info

Publication number
EP0466849A1
EP0466849A1 EP19910901682 EP91901682A EP0466849A1 EP 0466849 A1 EP0466849 A1 EP 0466849A1 EP 19910901682 EP19910901682 EP 19910901682 EP 91901682 A EP91901682 A EP 91901682A EP 0466849 A1 EP0466849 A1 EP 0466849A1
Authority
EP
European Patent Office
Prior art keywords
cylinder
exhaust gas
volume
exhaust
exhaust pipe
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Withdrawn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
EP19910901682
Other languages
German (de)
English (en)
Inventor
Ernst Wild
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 EP0466849A1 publication Critical patent/EP0466849A1/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Withdrawn legal-status Critical Current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
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M15/00—Testing of engines
    • G01M15/04—Testing internal-combustion engines
    • G01M15/10—Testing internal-combustion engines by monitoring exhaust gases or combustion flame
    • G01M15/102—Testing internal-combustion engines by monitoring exhaust gases or combustion flame by monitoring exhaust gases
    • G01M15/104—Testing internal-combustion engines by monitoring exhaust gases or combustion flame by monitoring exhaust gases using oxygen or lambda-sensors
    • 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 assigning combustion errors to a cylinder of an internal combustion engine.
  • Such methods are of interest because they make it possible to selectively interrupt the fuel supply to a cylinder that is working incorrectly. This prevents an unburned mixture from being expelled.
  • the unburned mixture burns in the catalyst, which today usually belongs to an internal combustion engine.
  • Such post-combustion easily leads to the destruction of the catalyst by overheating. In individual cases, vehicle fires also occur. Combustion errors are particularly misfires. However, this also includes errors according to which poor combustion quality is caused by incorrect fuel metering, in particular by a leaky injection valve.
  • Combustion errors can be detected very reliably if the combustion process in each cylinder is carried out immediately with the aid of a sensor, e.g. B. a ticht- or a Druckse ⁇ sors, is monitored.
  • a sensor e.g. B. a ticht- or a Druckse ⁇ sors
  • sensors are very expensive, which is disadvantageous for the practical use of the associated methods.
  • a similar disadvantage applies to methods which attempt to detect misfires.
  • Special inductive sensors are also required for this, which determine whether an ignition current flows in a respective ignition cable.
  • disadvantageous is in such methods that they are unable to detect misfires due to a fault other than an ignition fault.
  • the method according to the invention for assigning combustion errors to a cylinder can be used in internal combustion engines which have at least one exhaust pipe between an exhaust manifold collection point and a lambda probe. It is characterized in that a) the exhaust gas volume, which is dependent on the load and speed during the intake process, is determined for each exhaust cycle of a cylinder, b) when a cylinder emits exhaust gas, it is assumed that the calculated exhaust gas volume at the collection point by the associated company ⁇ towards the manifold enters the exhaust pipe, c) the volumes that have entered the exhaust pipe at the collection point are added up until the volume is reached or just exceeded that corresponds to the exhaust pipe volume between the collection point and the probe, d) with the help the cylinder-assigned sequence of the exhaust gas volumes that have entered the exhaust pipe is determined Which cylinder belongs to that volume for which the above-mentioned sum condition has just been fulfilled, e) the signal emitted by the lambda probe is evaluated, f) and when the probe signal deviates from the lambda mean
  • step c and d can only be carried out if the evaluation of the signal from the lambda probe shows that "there is a greater lambda deviation.
  • step c the volume values of ins Exhaust pipe quantities that have entered the exhaust pipe can be stored so that they are available for summation It is sufficient here to store the values for as many volumes as possible in the exhaust pipe volume between the collection point and the lambda sensor, for the maximum volume, namely at the lowest exhaust gas temperature Find.
  • the exhaust gas volume according to step a is advantageously determined using a table, since this procedure is faster than if the volume is calculated using an arithmetic relationship between the respective load and speed during the intake process.
  • the method according to the invention works with the signal of the lambda probe, it can not only assign combustion misfires to a cylinder, but also other errors of the type described at the beginning.
  • Figure 1 is a schematic representation of an internal combustion engine with four exhaust manifolds and an exhaust pipe, in which exhaust gas volume are shown.
  • FIG 3 shows a schematic representation of an internal combustion engine with two exhaust pipes between an exhaust manifold collecting point and a lambda probe.
  • FIG. 1 shows an internal combustion engine 10 merely as a rectangular block, which has four cylinders 1-4, each of which is symbolized by a circle.
  • An exhaust manifold 11.1-11.4 leads from each cylinder to an exhaust pipe 12.
  • the point where the exhaust manifold 11.1-11.4 opens into the exhaust pipe 12 is referred to below as a collection point 13.
  • a lambda probe 14 projects into the exhaust pipe 12.
  • the section of the exhaust pipe between the collection point 13 and the lambda probe 14 is important for the following.
  • the volume value of each exhaust gas volume or exhaust gas packet from a cylinder depends on the intake air mass and the exhaust gas temperature.
  • the intake air mass is known in internal combustion engines which have a lambda probe, since it is the size to which fuel must be metered in such an amount that a desired load value is established.
  • the exhaust gas temperature can be determined from the load and speed, likewise variables that are available in methods for lambda control.
  • the volume values for individual exhaust gas packs for stationary operating states were determined as a function of speed and load and entered in a table. Volume values, again dependent on the speed and load, were read from this table when the method described here was carried out.
  • this volume is determined with the help of the above-mentioned volume table, with the help of values of load and speed, which applied to the associated intake process.
  • this volume has the value 42. This volume is based on the total volume of the exhaust pipe 12 between the collection point 13 and the lambda sensor 14.
  • Collection point 13 and the probe 14 corresponds.
  • the exhaust gas volumes for each individual cylinder are determined from a table which was obtained on the basis of measurements during stationary operation of an internal combustion engine. Now, however, it is the case that, in the event of a sudden increase in load, the exhaust gas expelled from a cylinder in the exhaust gas pipe 12 cools somewhat more than in the stationary case with a higher load. Conversely, in the event of a sudden reduction in load, the exhaust gas that is expelled is heated up a little further, since the exhaust system is still strongly warmed up by operation previously under a higher load. However, it has been found that the consequent V * t ⁇ ltn ⁇ en Surgi Brenn ⁇ in conventional combustion engines do not bring significant errors.
  • Fig. 3 shows schematically an internal combustion engine with two Zylin ⁇ derblöcken 10.1 and 10.2 and two respectively associated Abgasroh ⁇ ren 12.1 and 12.2, the 'e iner to respective ones of two Sammelstel ⁇ start len 13.1 and 13.2 and the common gas pipe in a Hauptab ⁇ 15 mouth.
  • a lambda probe 14.1 and 14.2 is inserted into each of the two exhaust pipes 12.1 and 12.2.
  • a process is carried out separately for each of the two exhaust pipes 12.1 and 12.2, as was explained with reference to FIGS. 1 and 2 for the exhaust pipe 12 between the collection point 13 and the lambda sensor 14.
  • the method described allows a reliable assignment of misfires to a cylinder without the need for a special sensor.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Emergency Medicine (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Exhaust Silencers (AREA)

Abstract

Un procédé permet d'attribuer des défauts de combustion à un cylindre d'un moteur à combustion interne ayant au moins un tuyau d'échappement agencé entre le site collecteur d'un collecteur de gaz d'échappement et une sonde lambda. Selon le procédé, (a) le volume de gaz d'échappement, qui dépend de la charge et du régime pendant l'aspiration, est déterminé pour chaque course d'expulsion d'un cylindre; (b) lorsqu'un cylindre expulse des gaz d'échappement, on suppose que le volume calculé de gaz d'échappement pénètre dans le site collecteur du collecteur correspondant dans le tuyau d'échappement; (c) les volumes qui pénètrent dans le tuyau d'échappement par le site collecteur sont additionnés jusqu'à atteindre ou dépasser à peine le volume qui correspond au volume du tuyau d'échappement compris entre le site collecteur et la sonde; (d) on détermine, sur la base de la correspondance entre les cylindres et les volumes de gaz d'échappement qui pénètrent successivement dans le tuyau d'échappement, à quel cylindre correspond le volume ayant rempli par addition la condition ci-dessus; (e) le signal émis par la sonde lambda est évalué; (f) lorsque le signal de la sonde indique un écart, par rapport à la valeur moyenne de lambda, supérieur à une valeur seuil, le défaut à l'origine de cet écart est attribué au cylindre dont les gaz d'échappement passent par la sonde, selon le procédé de détermination de l'étape (d). Ce procédé peut être mis en oeuvre sans détecteurs spéciaux. Etant donné que l'on additionne les volumes individuels de gaz d'échappement dépendants de la charge et du régime pendant l'aspiration, le procédé donne des indications fiables même lors de transitions instationnaires.
EP19910901682 1990-02-08 1991-01-09 Procede d'attribution de defauts de combustion a un cylindre de moteur a combustion interne Withdrawn EP0466849A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4003752A DE4003752A1 (de) 1990-02-08 1990-02-08 Verfahren zum zuordnen von verbrennungsfehlern zu einem zylinder einer brennkraftmaschine
DE4003752 1990-02-08

Publications (1)

Publication Number Publication Date
EP0466849A1 true EP0466849A1 (fr) 1992-01-22

Family

ID=6399680

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910901682 Withdrawn EP0466849A1 (fr) 1990-02-08 1991-01-09 Procede d'attribution de defauts de combustion a un cylindre de moteur a combustion interne

Country Status (5)

Country Link
EP (1) EP0466849A1 (fr)
JP (1) JPH04505490A (fr)
KR (1) KR920701640A (fr)
DE (1) DE4003752A1 (fr)
WO (1) WO1991012422A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3042062A1 (fr) * 2013-09-04 2016-07-13 MAN Diesel & Turbo SE Procédé permettant de faire fonctionner un moteur à combustion interne

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2905820B2 (ja) * 1990-09-29 1999-06-14 スズキ株式会社 内燃機関の失火検出装置
DE4206224A1 (de) * 1992-02-28 1993-04-01 Daimler Benz Ag Verfahren zur ueberpruefung der signale von sonden
EP0616122A1 (fr) * 1993-03-19 1994-09-21 Siemens Aktiengesellschaft Méthode d'évaluation des valeurs de mesure d'un détecteur placé dans l'échappement d'un moteur à combustion
DE19513370B4 (de) * 1995-04-08 2008-06-12 Robert Bosch Gmbh Verfahren und Vorrichtung zur Steuerung der Leistung einer Brennkraftmaschine
CA2275851A1 (fr) 1998-06-19 1999-12-19 Kiyomori Asano Moteur a deux temps et a cylindres multiples pour vehicules legers
JP3913986B2 (ja) * 2001-01-09 2007-05-09 三菱電機株式会社 内燃機関の空燃比制御装置
DE10212428B4 (de) * 2002-03-21 2004-05-13 Robert Bosch Gmbh Verfahren zum Schutz einer Brennkraftmaschine
DE10258426B4 (de) 2002-12-13 2008-08-21 Siemens Ag Verfahren und Vorrichtung zum Überwachen einer Steuereinrichtung einer Brennkraftmaschine
JP4365626B2 (ja) 2003-06-25 2009-11-18 三菱自動車工業株式会社 多気筒エンジンの空燃比制御装置
FR2919678A1 (fr) * 2007-08-02 2009-02-06 Renault Sas Procede et dispositif pour diagnostiquer une fuite d'injecteur dans un moteur a combustion interne
DE102008031696B4 (de) * 2008-07-04 2019-07-11 Bayerische Motoren Werke Aktiengesellschaft Vorrichtung zur Erkennung eines Verbrennungsaussetzers einer Brennkraftmaschine
DE102009035700B3 (de) * 2009-07-30 2011-06-09 Agrogen Gmbh Verfahren und Vorrichtung zur zylinderselektiven Erkennung von Zündaussetzern
US8224557B2 (en) * 2009-09-30 2012-07-17 GM Global Technology Operations LLC Control systems and methods using geometry based exhaust mixing model

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6045297B2 (ja) * 1977-07-22 1985-10-08 株式会社日立製作所 内燃機関の燃料制御装置
JPS57122144A (en) * 1981-01-20 1982-07-29 Nissan Motor Co Ltd Air fuel ratio feedback control unit
DE3145235C1 (de) * 1981-11-13 1983-07-21 Bayerische Motoren Werke AG, 8000 München Regeleinrichtung fuer die Luftzahl von Brennkraftmaschinen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9112422A1 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3042062A1 (fr) * 2013-09-04 2016-07-13 MAN Diesel & Turbo SE Procédé permettant de faire fonctionner un moteur à combustion interne
US10174692B2 (en) 2013-09-04 2019-01-08 Man Energy Solutions Se Method for operating an internal combustion engine
EP3042062B1 (fr) * 2013-09-04 2022-04-06 Andreas Döring Procédé de contrôle d'un moteur à combustion interne

Also Published As

Publication number Publication date
KR920701640A (ko) 1992-08-12
DE4003752A1 (de) 1991-08-14
JPH04505490A (ja) 1992-09-24
WO1991012422A1 (fr) 1991-08-22

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