DE102004038733A1 - Method and device for operating an internal combustion engine - Google Patents
Method and device for operating an internal combustion engine Download PDFInfo
- Publication number
- DE102004038733A1 DE102004038733A1 DE102004038733A DE102004038733A DE102004038733A1 DE 102004038733 A1 DE102004038733 A1 DE 102004038733A1 DE 102004038733 A DE102004038733 A DE 102004038733A DE 102004038733 A DE102004038733 A DE 102004038733A DE 102004038733 A1 DE102004038733 A1 DE 102004038733A1
- Authority
- DE
- Germany
- Prior art keywords
- mass flow
- air mass
- air
- internal combustion
- combustion engine
- 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.)
- Ceased
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
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/18—Circuit arrangements for generating control signals by measuring intake air 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
- F02D41/0002—Controlling intake air
- F02D41/0007—Controlling intake air for control of turbo-charged or super-charged engines
-
- 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
- F02D11/00—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
- F02D11/06—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance
- F02D11/10—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type
- F02D11/107—Safety-related aspects
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/04—Engine intake system parameters
- F02D2200/0402—Engine intake system parameters the parameter being determined by using a model of the engine intake or its components
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/04—Engine intake system parameters
- F02D2200/0406—Intake manifold 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
Es werden ein Verfahren und eine Vorrichtung zum Betreiben einer Brennkraftmaschine (1) vorgeschlagen, die eine Leckageerkennung ohne Luftmassenmesser ermöglichen. Dabei wird ein erster Wert für einen Luftmassenstrom zur Brennkraftmaschine (1) aus mindestens zwei Betriebsgrößen der Brennkraftmaschine (1) modelliert. Ein zweiter Wert für den Luftmassenstrom zur Brennkraftmaschine (1) wird aus einer Druckdifferenz über einer Komponente (5) einer Luftzufuhr (10) zur Brennkraftmaschine (1) ermittelt. Die beiden Werte für den Luftmassenstrom werden miteinander verglichen. Bei einer betragsmäßigen Abweichung der beiden Werte für den Luftmassenstrom um mehr als einen vorgegebenen Schwellwert wird ein Fehler erkannt.A method and a device for operating an internal combustion engine (1) are proposed, which enable leakage detection without air mass meter. In this case, a first value for an air mass flow to the internal combustion engine (1) from at least two operating variables of the internal combustion engine (1) is modeled. A second value for the air mass flow to the internal combustion engine (1) is determined from a pressure difference across a component (5) of an air supply (10) to the internal combustion engine (1). The two values for the air mass flow are compared with each other. If the two values for the air mass flow deviate by more than a predetermined threshold, an error is detected.
Description
Die Erfindung geht von einem Verfahren und von einer Vorrichtung zum Betreiben einer Brennkraftmaschine nach der Gattung der unabhängigen Ansprüche aus.The The invention relates to a method and a device for Operating an internal combustion engine according to the preamble of the independent claims.
Es sind bereits Verfahren und Vorrichtungen zum Betreiben einer Brennkraftmaschine bekannt, bei denen ein Wert für einen Luftmassenstrom zur Brennkraftmaschine aus mindestens zwei Betriebsgrößen der Brennkraftmaschine modelliert wird. Bei diesen mindestens zwei Betriebsgrößen der Brennkraftmaschine handelt es sich beispielsweise um den Druck stromauf einer Drosselklappe und die Position der Drosselklappe.It are already methods and apparatus for operating an internal combustion engine known in which a value for an air mass flow to the engine of at least two Operating variables of Internal combustion engine is modeled. In these at least two operating sizes of Internal combustion engine is, for example, the pressure upstream a throttle and the position of the throttle.
Weiterhin ist es im Falle von Brennkraftmaschinen mit Aufladung bekannt, dass im Falle einer Leckage stromabwärts eines Verdichters in einer Luftzufuhr der Brennkraftmaschine der Ladedruck sinkt. Eine vorhandene Ladedruckregelung veranlasst dann das Schließen eine Bypassventils um eine Turbine in einem Abgasstrang der Brennkraftmaschine, die den Verdichter in der Luftzufuhr über eine Welle antreibt. Auf diese Weise kann ein vorgegebner Ladedrucksollwert wieder erreicht werden. Dabei dreht die Turbine schneller, weil sie auch die Leistung für die Verdichtung der Leckageluft aufbringen muss. Es besteht die Gefahr des Überdrehens. Bei aufgeladenen Brennkraftmaschinen werden üblicher Weise Luftmassenmesser zur Messung des Luftmassenstroms zur Brennkraftmaschine bzw. der Luftfüllung im Brennraum der Brennkraftmaschine eingesetzt. Der stromaufwärts des Verdichters eingebaute Luftmassenmesser misst dabei die Summe aus der Leckageluft und der Luft, die letztendlich in die Brennkraftmaschine strömt. Mit Hilfe des Drucksensors stromaufwärts der Drosselklappe, der den Ladedruck misst, und der Position der Drosselklappe lässt sich außerdem der Luftmassenstrom der letztlich in die Brennkraftmaschine strömenden Luft modellieren. Durch Vergleich des vom Luftmassenmesser gemessenen Luftmassenstroms mit dem modellierten Luftmassenstrom lässt sich erkennen, ob eine Leckage zwischen dem Luftmassenmesser und dem Drucksensor vorliegt.Farther it is known in the case of supercharged internal combustion engines that in case of leakage downstream a compressor in an air supply of the internal combustion engine of Boost pressure drops. An existing charge pressure control then causes the closing a bypass valve around a turbine in an exhaust line of the internal combustion engine, which drives the compressor in the air supply via a shaft. On This way, a pre-set boost pressure setpoint can be reached again become. The turbine rotates faster, because it also the power for compression the leakage air must apply. There is a risk of overspeeding. In supercharged internal combustion engines are usually air mass meter for measuring the air mass flow to the internal combustion engine or the Air filling in the Combustion chamber of the internal combustion engine used. The upstream of the Compressor's built-in air mass meter measures the sum the leakage air and the air that ultimately enters the internal combustion engine flows. With the help of the pressure sensor upstream of the throttle, the measures the boost pressure, and the position of the throttle can also be the Air mass flow of the air ultimately flowing into the internal combustion engine model. By comparing the measured by the air mass meter Air mass flow with the modeled air mass flow can be Detect if a leak between the air mass meter and the Pressure sensor is present.
Vorteile der ErfindungAdvantages of invention
Das erfindungsgemäße Verfahren und die erfindungsgemäße Vorrichtung zum Betreiben einer Brennkraftmaschine mit den Merkmalen der unabhängigen Ansprüche haben demgegenüber den Vorteil, dass ein zweiter Wert für den Luftmassenstrom zur Brennkraftmaschine aus der Druckdifferenz über einer Komponente einer Luftzufuhr zur Brennkraftmaschine ermittelt wird, dass die beiden Werte für den Luftmassenstrom miteinander verglichen werden und dass bei einer betragsmäßigen Abweichung der beiden Werte für den Luftmassenstrom um mehr als einen vorgegebenen Schwellwert ein Fehler erkannt wird. Auf diese Weise lässt sich der Fehler bzw. ein Leck in der Luftzufuhr auch dann erkennen, wenn kein Luftmassenmesser zur Messung des Luftmassenstroms zur Verfügung steht.The inventive method and the device according to the invention for operating an internal combustion engine having the features of the independent claims In contrast, the advantage that a second value for the air mass flow to the engine from the pressure difference over one Component of an air supply to the internal combustion engine is determined that the two values for the Air mass flow are compared with each other and that at a amount difference of the two values for the air mass flow by more than a predetermined threshold Error is detected. In this way, the error or a leak can be in the air supply even then detect if no air mass meter is available for measuring the air mass flow.
Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen des im Hauptanspruch angegebenen Verfahrens möglich.By in the subclaims listed activities are advantageous developments and improvements of the main claim specified method possible.
Besonders einfach lässt sich der erste Wert für den Luftmassenstrom aus einem Saugrohrdruck und einer Motordrehzahl modellieren.Especially just lets the first value for the air mass flow from an intake manifold pressure and an engine speed model.
Auch lässt sich der erste Wert für den Luftmassenstrom einfach aus einem Druck in der Luftzufuhr stromauf eines leistungsstellenden Elements und aus einem Öffnungsgrad des leistungsstellenden Elements modellieren.Also let yourself the first value for the air mass flow simply from a pressure in the air supply upstream a performer and an opening degree modeling of the performing element.
Die Genauigkeit bei der Ermittlung des zweiten Wertes für den Luftmassenstrom lässt sich erhöhen, wenn der zweite Wert für den Luftmassenstrom korrigiert wird.The Accuracy in determining the second value for the air mass flow let yourself increase, if the second value for the air mass flow is corrected.
Eine solche Korrektur lässt sich besonders einfach und präzise abhängig von der Differenz zwischen dem ersten Wert und dem zweiten Wert für den Luftmassenstrom durchführen.A such correction leaves very easy and precise dependent from the difference between the first value and the second value for the Perform air mass flow.
Besonders einfach und exakt lässt sich die Korrektur mittels einer Regelung durchführen.Especially easy and precise to carry out the correction by means of a regulation.
Die Genauigkeit bei der Ermittlung des ersten Wertes für den Luftmassenstrom lässt sich erhöhen, wenn der erste Wert für den Luftmassenstrom abhängig von einer zeitlichen Druckänderung stromauf eines leistungsstellenden Elements in der Luftzufuhr korrigiert wird.The Accuracy in determining the first value for the air mass flow let yourself increase, if the first value for the air mass flow dependent from a temporal pressure change Corrected upstream of a power element in the air supply becomes.
Ein weiterer Vorteil ergibt sich, wenn die beiden Werte den Luftmassenstrom an unterschiedlichen Stellen der Luftzufuhr kennzeichnen. Auf diese Weise wird es ermöglicht, ein Leck zwischen diesen unterschiedlichen Stellen der Luftzufuhr zu erkennen.One Another advantage arises when the two values the air mass flow mark at different points of the air supply. In this way is it possible a leak between these different parts of the air supply to recognize.
Zeichnungdrawing
Ein
Ausführungsbeispiel
der Erfindung ist in der Zeichnung dargestellt und in der nachfolgenden Beschreibung
näher erläutert. Es
zeigen
Beschreibung des Ausführungsbeispielsdescription of the embodiment
In
Der
Doppelpfeil in
In
Folgender
Zusammenhang ist beim Vergleich des auf der Grundlage des Differenzdrucks dplufi
ermittelten Luftmassenstroms mslufiuk durch das Luftfilter
Die Proportionalitätskonstante K kann beispielsweise mit Hilfe einer Messreihe auf einem Prüfstand ermittelt werden.The proportionality For example, K can be determined by means of a series of measurements on a test bench become.
Weiterhin
erfindungsgemäß ist es
nun vorgesehen, dass der Ausgang des Subtraktionsgliedes
Wenn
also plötzlich
ein Leck beispielsweise stromabwärts
des Verdichters
Durch
das erfindungsgemäße Verfahren
und die erfindungsgemäße Vorrichtung
ist eine Leckageerkennung in der Luftzufuhr
Der
Vorgang der zunehmenden Verschmutzung des Luftfilters
Der
vom Drucksensor
Die
Position der Drosselklappe
Die
erhebliche Abweichung des Luftmassenstrom msdk durch die Drosselklappe
Entscheidend
zur Leckerkennung ist es also, wenn die beiden Werte für den Luftmassenstrom
an verschiedenen Stellen der Luftzufuhr
Durch
das erste Multiplikationsglied
Claims (9)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004038733A DE102004038733A1 (en) | 2004-08-10 | 2004-08-10 | Method and device for operating an internal combustion engine |
FR0552457A FR2874237A1 (en) | 2004-08-10 | 2005-08-08 | Supercharged internal combustion engine e.g. gasoline engine, controlling method, involves comparing values of mass air flow, and estimating defect if values have amplitude difference higher than predefined threshold |
CNB2005100911551A CN100532810C (en) | 2004-08-10 | 2005-08-10 | Operating method and device of internal combustion engine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004038733A DE102004038733A1 (en) | 2004-08-10 | 2004-08-10 | Method and device for operating an internal combustion engine |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102004038733A1 true DE102004038733A1 (en) | 2006-02-23 |
Family
ID=35721225
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102004038733A Ceased DE102004038733A1 (en) | 2004-08-10 | 2004-08-10 | Method and device for operating an internal combustion engine |
Country Status (3)
Country | Link |
---|---|
CN (1) | CN100532810C (en) |
DE (1) | DE102004038733A1 (en) |
FR (1) | FR2874237A1 (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007022703B3 (en) * | 2007-05-15 | 2008-11-20 | Continental Automotive Gmbh | Method for controlling a supercharged internal combustion engine |
WO2008142058A2 (en) * | 2007-05-21 | 2008-11-27 | Continental Automotive Gmbh | Diagnostic method and device for diagnosing an intake system of an internal combustion engine |
DE102007052576A1 (en) * | 2007-11-03 | 2009-05-07 | Volkswagen Ag | Diagnostic method for recognition of errors during pressure sensor supported boost-pressure control of turbocharger of combustion engine, involves measuring pressure values of charge pressure sensor and manifold pressure sensor |
DE102008027762B3 (en) * | 2008-06-11 | 2010-02-11 | Continental Automotive Gmbh | Method and device for diagnosing an intake tract of an internal combustion engine |
DE102011017577A1 (en) | 2011-04-27 | 2012-10-31 | Bayerische Motoren Werke Aktiengesellschaft | Method for testing intake tract leakage of e.g. diesel internal combustion engine, involves measuring air pressure with pressure sensor and air quantity or air mass with mass flow meter for defined time duration |
DE102011086361A1 (en) * | 2011-11-15 | 2013-05-16 | Bayerische Motoren Werke Aktiengesellschaft | Method for detecting leakage in air intake of spark-ignition internal combustion engine used in motor car, involves determining leakage in air intake based on primary and secondary characteristics of air mass flow |
DE102008005369B4 (en) * | 2007-01-24 | 2013-05-29 | GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) | Air filter throttle monitoring without pressure sensors upstream of the throttle |
CN104675538A (en) * | 2013-12-03 | 2015-06-03 | 罗伯特·博世有限公司 | Method and measuring arrangement for determining fresh air mass flow |
DE102008013749B4 (en) | 2007-03-14 | 2019-07-11 | Scania Cv Ab | Device for detecting a loss of air in an air-line way |
WO2019149506A1 (en) * | 2018-02-05 | 2019-08-08 | Bayerische Motoren Werke Aktiengesellschaft | Method for detecting a leak in an air intake duct of an internal combustion engine |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2980525B1 (en) * | 2011-09-26 | 2013-08-30 | Renault Sa | METHOD AND SYSTEM FOR DIAGNOSING A MOTOR PUMPS GROUP WITH TWO TURBOCHARGERS. |
DE102018220391A1 (en) * | 2018-11-28 | 2020-05-28 | Robert Bosch Gmbh | Method for determining an air mass flow for an internal combustion engine |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5384707A (en) * | 1990-12-07 | 1995-01-24 | Ford Motor Company | Diagnostic airflow measurement |
DE19946874A1 (en) * | 1999-09-30 | 2001-04-05 | Bosch Gmbh Robert | Logical diagnostic procedure determining causes of defective air fuel mixture supply to engine, forms paired comparisons of measurements at differing loading conditions |
US6701282B2 (en) * | 2001-09-20 | 2004-03-02 | General Motors Corporation | Fault identification diagnostic for intake system sensors |
DE10209870A1 (en) * | 2002-03-06 | 2003-09-18 | Volkswagen Ag | Method for detecting a leak in the inlet duct of an internal combustion engine and for carrying out the method internal combustion engine |
JP2004092614A (en) * | 2002-09-04 | 2004-03-25 | Honda Motor Co Ltd | Air flow sensor failure deciding device |
DE10300592B4 (en) * | 2003-01-10 | 2015-12-10 | Robert Bosch Gmbh | Method for operating an internal combustion engine |
-
2004
- 2004-08-10 DE DE102004038733A patent/DE102004038733A1/en not_active Ceased
-
2005
- 2005-08-08 FR FR0552457A patent/FR2874237A1/en active Pending
- 2005-08-10 CN CNB2005100911551A patent/CN100532810C/en not_active Expired - Fee Related
Cited By (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008005369B4 (en) * | 2007-01-24 | 2013-05-29 | GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) | Air filter throttle monitoring without pressure sensors upstream of the throttle |
DE102008013749B4 (en) | 2007-03-14 | 2019-07-11 | Scania Cv Ab | Device for detecting a loss of air in an air-line way |
US8370047B2 (en) | 2007-05-15 | 2013-02-05 | Continental Automotive Gmbh | Method for operating a forced-induction internal combustion engine |
DE102007022703B3 (en) * | 2007-05-15 | 2008-11-20 | Continental Automotive Gmbh | Method for controlling a supercharged internal combustion engine |
WO2008142058A2 (en) * | 2007-05-21 | 2008-11-27 | Continental Automotive Gmbh | Diagnostic method and device for diagnosing an intake system of an internal combustion engine |
DE102007023559B3 (en) * | 2007-05-21 | 2008-12-04 | Continental Automotive Gmbh | Diagnostic method and device for diagnosing an intake tract of an internal combustion engine |
WO2008142058A3 (en) * | 2007-05-21 | 2009-01-22 | Continental Automotive Gmbh | Diagnostic method and device for diagnosing an intake system of an internal combustion engine |
US8353198B2 (en) | 2007-05-21 | 2013-01-15 | Continental Automotive Gmbh | Diagnostic method and device for diagnosing an intake system of an internal combustion engine |
DE102007052576A1 (en) * | 2007-11-03 | 2009-05-07 | Volkswagen Ag | Diagnostic method for recognition of errors during pressure sensor supported boost-pressure control of turbocharger of combustion engine, involves measuring pressure values of charge pressure sensor and manifold pressure sensor |
DE102007052576B4 (en) | 2007-11-03 | 2018-05-03 | Volkswagen Ag | Diagnostic method for detecting errors in pressure sensor-based boost pressure control of an exhaust gas turbocharger of an internal combustion engine |
US8463490B2 (en) | 2008-06-11 | 2013-06-11 | Continental Automotive Gmbh | Method and device for diagnosing an intake tract of an internal combustion engine |
DE102008027762B3 (en) * | 2008-06-11 | 2010-02-11 | Continental Automotive Gmbh | Method and device for diagnosing an intake tract of an internal combustion engine |
DE102011017577A1 (en) | 2011-04-27 | 2012-10-31 | Bayerische Motoren Werke Aktiengesellschaft | Method for testing intake tract leakage of e.g. diesel internal combustion engine, involves measuring air pressure with pressure sensor and air quantity or air mass with mass flow meter for defined time duration |
DE102011086361A1 (en) * | 2011-11-15 | 2013-05-16 | Bayerische Motoren Werke Aktiengesellschaft | Method for detecting leakage in air intake of spark-ignition internal combustion engine used in motor car, involves determining leakage in air intake based on primary and secondary characteristics of air mass flow |
DE102011086361B4 (en) * | 2011-11-15 | 2021-02-25 | Bayerische Motoren Werke Aktiengesellschaft | Method for detecting leaks in the intake tract of an internal combustion engine in a motor vehicle |
CN104675538A (en) * | 2013-12-03 | 2015-06-03 | 罗伯特·博世有限公司 | Method and measuring arrangement for determining fresh air mass flow |
CN104675538B (en) * | 2013-12-03 | 2022-03-01 | 罗伯特·博世有限公司 | Method and measuring device for determining a fresh air mass flow |
WO2019149506A1 (en) * | 2018-02-05 | 2019-08-08 | Bayerische Motoren Werke Aktiengesellschaft | Method for detecting a leak in an air intake duct of an internal combustion engine |
DE102018201680A1 (en) * | 2018-02-05 | 2019-08-08 | Bayerische Motoren Werke Aktiengesellschaft | Method for determining a leakage in an intake air duct of an internal combustion engine |
Also Published As
Publication number | Publication date |
---|---|
FR2874237A1 (en) | 2006-02-17 |
CN1734075A (en) | 2006-02-15 |
CN100532810C (en) | 2009-08-26 |
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