DE102020212568A1 - Device and method for diagnosing manipulation of an exhaust system of an internal combustion engine - Google Patents

Device and method for diagnosing manipulation of an exhaust system of an internal combustion engine Download PDF

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Publication number
DE102020212568A1
DE102020212568A1 DE102020212568.6A DE102020212568A DE102020212568A1 DE 102020212568 A1 DE102020212568 A1 DE 102020212568A1 DE 102020212568 A DE102020212568 A DE 102020212568A DE 102020212568 A1 DE102020212568 A1 DE 102020212568A1
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Germany
Prior art keywords
manipulation
internal combustion
combustion engine
exhaust line
procedure
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DE102020212568.6A
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German (de)
Inventor
Manuel Weber
Torsten Doll
Christian Steinbrecher
Juergen Berkemer
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Robert Bosch GmbH
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Robert Bosch GmbH
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Priority to DE102020212568.6A priority Critical patent/DE102020212568A1/en
Publication of DE102020212568A1 publication Critical patent/DE102020212568A1/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • 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
    • G01M15/09—Testing internal-combustion engines by monitoring pressure in fluid ducts, e.g. in lubrication or cooling parts
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2550/00—Monitoring or diagnosing the deterioration of exhaust systems
    • F01N2550/24—Determining the presence or absence of an exhaust treating device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
    • F01N2560/08—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a pressure sensor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2590/00—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines
    • F01N2590/04—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines for motorcycles
    • 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

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Exhaust Silencers (AREA)

Abstract

Die Erfindung betrifft eine Vorrichtung und ein Verfahren zur Diagnose einer Manipulation eines Abgasstrangs einer Brennkraftmaschine, wobei die Manipulation des Abgasstrangs der Brennkraftmaschine eine potentielle Steigerung der Geräusch Emissionen zur Folge hat. Es wird vorgeschlagen, dass ein Drucksensor (14) den Schalldruck beziehungsweise Druckschwankungen im Abgasstrang (12) eines Fahrzeugs (10) detektiert.The invention relates to a device and a method for diagnosing a manipulation of an exhaust system of an internal combustion engine, the manipulation of the exhaust system of the internal combustion engine resulting in a potential increase in noise emissions. It is proposed that a pressure sensor (14) detects the sound pressure or pressure fluctuations in the exhaust line (12) of a vehicle (10).

Description

Die Erfindung betrifft eine Vorrichtung und ein Verfahren zur Diagnose einer Manipulation eines Abgasstrangs einer Brennkraftmaschine.The invention relates to a device and a method for diagnosing a manipulation of an exhaust system of an internal combustion engine.

Stand der TechnikState of the art

Es sind Vorrichtungen und Verfahren gegen Manipulationen im Fahrzeug bekannt.Devices and methods against manipulations in the vehicle are known.

Offenbarung der ErfindungDisclosure of Invention

Aufgabe der Erfindung ist es, der durch Manipulation des Abgasstrangs von Fahrzeugen wie Zweirädern ausgelösten Lärmbelästigung entgegen zu wirken und somit einen Beitrag dazu zu leisten, die Lärmbelästigung durch manipulierte Fahrzeuge zu mindern. Die Erfindung erkennt eine Manipulation des Abgassystems eines Verbrennungsmotors, die eine Erhöhung der Geräuschemissionen des Fahrzeugs zur Folge haben könnte und leitet Maßnahmen ein, um den Betrieb des potentiell manipulierten Fahrzeugs zu erschweren oder zu unterbinden.The object of the invention is to counteract the noise pollution caused by manipulation of the exhaust system of vehicles such as two-wheelers and thus to contribute to reducing the noise pollution caused by manipulated vehicles. The invention recognizes a manipulation of the exhaust system of an internal combustion engine that could result in an increase in the noise emissions of the vehicle and initiates measures to make the potentially manipulated vehicle more difficult or to prevent it from being operated.

Figurenlistecharacter list

  • 1 zeigt schematisch ein System mit einem Zweirad mit erfindungsgemäßer Anordnung eines Drucksensors im Abgasstrang. 1 shows schematically a system with a two-wheeler with an inventive arrangement of a pressure sensor in the exhaust system.
  • 2 zeigt schematisch einen Vergleich von Druckamplituden, die in einem Fahrzeug im Serienzustand gemessen werden und Druckamplituden, die in einem manipulierten Fahrzeug gemessen werden. 2 shows a schematic comparison of pressure amplitudes measured in a vehicle in the production state and pressure amplitudes measured in a manipulated vehicle.

Beschreibungdescription

Die Erfindung betrifft eine Vorrichtung und ein Verfahren zur Diagnose einer Manipulation eines Abgasstrangs einer Brennkraftmaschine, wobei die Manipulation des Abgasstrangs der Brennkraftmaschine eine potentielle Steigerung der Geräusch Emissionen zur Folge aufweist. Gemessen wird hierbei der Schalldruck, der von einer Schallwelle ausgeübt wird. Je größer die Schwingungsamplitude ist, desto lauter wird der Ton vom menschlichen Ohr empfunden.The invention relates to a device and a method for diagnosing a manipulation of an exhaust system of an internal combustion engine, the manipulation of the exhaust system of the internal combustion engine resulting in a potential increase in noise emissions. The sound pressure exerted by a sound wave is measured here. The greater the amplitude of vibration, the louder the sound is perceived by the human ear.

1 zeigt ein Zweirad 10 mit einem Abgasstrang 12. Im Abgasstrang 12 ist ein Drucksensor 14 angeordnet. 1 shows a two-wheeler 10 with an exhaust line 12. In the exhaust line 12, a pressure sensor 14 is arranged.

Der Drucksensor misst den Abgasgegendruck. Die Pulsationen im Abgasgegendruck korrelieren mit einem gemessenen Schalldruck, der mit Mikrofonen außerhalb des Zweirades gemessen wird.The pressure sensor measures the exhaust back pressure. The pulsations in the exhaust back pressure correlate with a measured sound pressure, which is measured with microphones outside the two-wheeler.

Der Drucksensor 14 kann aber auch an einer anderen Stelle angeordnet sein. So ist es denkbar, dass der Drucksensor hinter dem Auslass oder hinter der Abgasreinigungsanlage oder am Schalldämpfer angeordnet ist. Alternativ zum Drucksensor könnten auch Körperschallsensoren oder Mikrofone zur Bereitstellung einer auszuwertenden Zustandsgröße am Fahrzeug verbaut werden. Aufgrund der hohen Temperaturen im Abgasstrang ist es von Vorteil, eine thermische Entkopplung durch eine zusätzliche Rohrleitung zu integrieren.However, the pressure sensor 14 can also be arranged at a different location. So it is conceivable that the pressure sensor is arranged behind the outlet or behind the emission control system or on the silencer. As an alternative to the pressure sensor, structure-borne noise sensors or microphones could also be installed on the vehicle to provide a state variable to be evaluated. Due to the high temperatures in the exhaust line, it is advantageous to integrate thermal decoupling through an additional pipe.

Der Drucksensor 14 detektiert Druckschwankungen im Abgasstrang 12. Diese Druckschwankungen weisen eine Korrelation mit dem außerhalb des Fahrzeuges gemessenen Schalldruck auf. Der Drucksensor 14 gibt dabei eine den Druckschwankungen proportionale Spannung aus.The pressure sensor 14 detects pressure fluctuations in the exhaust system 12. These pressure fluctuations have a correlation with the sound pressure measured outside the vehicle. The pressure sensor 14 outputs a voltage that is proportional to the pressure fluctuations.

Die vom Drucksensor 14 ausgegebenen Signale werden an eine elektronische Rechen- und/oder Steuereinheit 20 weitergeleitet. Die elektronische Rechen- und/oder Steuereinheit 20 ist erfindungsgemäß als Motorsteuergerät ausgebildet. Die elektronische Rechen- und/oder Steuereinheit 20 erkennt hierbei eine Abweichung zum Druck, die in einem Abgasstrang eines Fahrzeugs im Serienzustand auftreten.The signals output by the pressure sensor 14 are forwarded to an electronic arithmetic and/or control unit 20 . The electronic arithmetic and/or control unit 20 is designed according to the invention as an engine control unit. The electronic arithmetic and/or control unit 20 recognizes a deviation from the pressure that occurs in an exhaust system of a vehicle in the production state.

Erfindungsgemäß erfolgt die Signalauswertung über eine Frequenzanalyse. Denkbar ist aber auch eine zeitbasierte Auswertung.According to the invention, the signal evaluation takes place via a frequency analysis. However, a time-based evaluation is also conceivable.

Dabei werden bei definierten Frequenzen die gemessenen Druckamplituden im Abgasstrang mit hinterlegten Norm-Amplituden verglichen. Die Überschreitung eines Grenzwertes der Druckamplitude wird als Manipulation am Abgasstrang des Fahrzeugs bewertet. Bei Überschreitung des Grenzwertes wird eine Reaktion eingeleitet.The pressure amplitudes measured in the exhaust line are compared with stored standard amplitudes at defined frequencies. Exceeding a limit value of the pressure amplitude is assessed as manipulation of the vehicle's exhaust system. If the limit value is exceeded, a reaction is initiated.

2 zeigt einen Vergleich von Druckamplituden, die in einem Fahrzeug im Serienzustand gemessen werden und Druckamplituden, die in einem manipulierten Fahrzeug gemessen werden. 2 shows a comparison of pressure amplitudes measured in a vehicle in the production state and pressure amplitudes measured in a manipulated vehicle.

Wird eine Manipulation am Abgasstrang 12 des Zweirads 10 erkannt, erfolgt eine Information an den Fahrer des Zweirads 10 über ein Human Machine Interface (HMI) 22.If manipulation of the exhaust system 12 of the two-wheeler 10 is detected, information is sent to the driver of the two-wheeler 10 via a human-machine interface (HMI) 22.

Das HMI 22 kann beispielsweise als ein Display ausgeführt sein.The HMI 22 can be embodied as a display, for example.

In einer weiteren Form wird die Information in einer Cloud 24 gespeichert. Mögliche weitere Reaktionen im Fahrzeug können sein:

  • • Leistungsreduktion der Brennkraftmaschine über Notlaufbetrieb,
  • • Fahrzeugstilllegung beim nächstem Startversuch,
  • • Benachrichtigung einer Werkstatt,
  • • Benachrichtigung einer staatlichen Einrichtung 30 wie beispielsweise das Kraftfahrt-Bundesamt.
In another form, the information is stored in a cloud 24 . Possible further reactions in the vehicle can be:
  • • Power reduction of the internal combustion engine via emergency operation,
  • • Vehicle shutdown at the next start attempt,
  • • notification of a workshop,
  • • Notification of a state institution 30 such as the Federal Motor Transport Authority.

Claims (8)

Verfahren zur Diagnose einer Manipulation eines Abgasstrangs einer Brennkraftmaschine, wobei die Manipulation des Abgasstrangs der Brennkraftmaschine eine potentielle Steigerung der Geräusch Emissionen zur Folge hat, dadurch gekennzeichnet, dass ein Drucksensor (14) Druckschwankungen im Abgasstrang (12) eines Fahrzeugs 10 detektiert.Method for diagnosing a manipulation of an exhaust line of an internal combustion engine, the manipulation of the exhaust line of the internal combustion engine resulting in a potential increase in noise emissions, characterized in that a pressure sensor (14) detects pressure fluctuations in the exhaust line (12) of a vehicle 10. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die vom Drucksensor (14) ausgegebenen Signale an eine elektronische Rechen- und/oder Steuereinheit (20) weitergeleitet werden.procedure after claim 1 , characterized in that the signals emitted by the pressure sensor (14) are forwarded to an electronic computing and/or control unit (20). Verfahren nach Anspruch 2, dadurch gekennzeichnet, dass die Signalauswertung über eine Frequenzanalyse oder zeitbasiert erfolgt.procedure after claim 2 , characterized in that the signal evaluation is based on a frequency analysis or time. Verfahren nach Anspruch 3, dadurch gekennzeichnet, dass bei definierten Frequenzen die gemessenen Druckamplituden im Abgasstrang mit hinterlegten Norm-Amplituden verglichen werden.procedure after claim 3 , characterized in that the measured pressure amplitudes in the exhaust line are compared with stored standard amplitudes at defined frequencies. Verfahren nach Anspruch 4, dadurch gekennzeichnet, dass Die Überschreitung eines Grenzwertes der Druckamplitude als Manipulation am Abgasstrang des Fahrzeugs bewertet wird, wobei bei Überschreitung des Grenzwertes eine Reaktion eingeleitet wird.procedure after claim 4 , characterized in that the exceeding of a limit value of the pressure amplitude is evaluated as manipulation of the vehicle's exhaust system, with a reaction being initiated when the limit value is exceeded. Verfahren nach einem der vorhergehenden Ansprüche, wobei bei einer Erkennung einer Manipulation am Abgasstrang (12) des Zweirads (10) eine Reaktion erfolgt.Method according to one of the preceding claims, wherein a reaction occurs when a manipulation of the exhaust system (12) of the two-wheeler (10) is detected. Verfahren nach Anspruch 6, dadurch gekennzeichnet, dass mindestens eine der folgenden Reaktionen eingeleitet wird: • Ausgeben mindestens einer Information an einen Fahrer des Zweirads 10 über ein HMI (22), • Speicherung mindestens einer Information in einer Cloud (24), • Reduktion der Leistung der Brennkraftmaschine über einen Notlaufbetrieb, • Fahrzeugstilllegung beim nächstem Startvorgang, • Benachrichtigung einer Werkstatt, • Benachrichtigung einer staatlichen Einrichtung (30).procedure after claim 6 , characterized in that at least one of the following reactions is initiated: • Outputting at least one piece of information to a driver of the two-wheeler 10 via an HMI (22), • Storage of at least one piece of information in a cloud (24), • Reducing the power of the internal combustion engine an emergency operation, • vehicle decommissioning at the next starting process, • notification of a workshop, • notification of a state institution (30). Vorrichtung zur Durchführung des Verfahrens nach den Ansprüchen 1 bis 7 mit einem Abgasstrang (12), mit einem im Abgasstrang (12) angeordneten Drucksensor (14) und mit einer Rechen- und/oder Steuereinheit (20).Device for carrying out the method according to claims 1 until 7 with an exhaust line (12), with a pressure sensor (14) arranged in the exhaust line (12) and with a computing and/or control unit (20).
DE102020212568.6A 2020-10-06 2020-10-06 Device and method for diagnosing manipulation of an exhaust system of an internal combustion engine Pending DE102020212568A1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4336022A1 (en) * 2022-09-09 2024-03-13 Robert Bosch GmbH Device and method for diagnosing a manipulation of an exhaust line of an internal combustion engine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19821689A1 (en) 1998-05-14 1999-11-18 Porsche Ag Equipment for displaying motor vehicle noise emissions
DE102006016446A1 (en) 2006-04-07 2007-10-11 Robert Bosch Gmbh Method for testing the functionality of an exhaust gas arrangement in an internal combustion engine comprises using deviations of control parameters of a control device from a prescribed value to judge the functionality of the arrangement
DE102016116671A1 (en) 2015-09-11 2017-03-16 GM Global Technology Operations LLC Vehicle diagnosis based on vehicle sounds and vibrations
DE102019212795A1 (en) 2019-08-27 2021-03-04 Zf Friedrichshafen Ag Method for detecting increased noise emissions from a vehicle

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19821689A1 (en) 1998-05-14 1999-11-18 Porsche Ag Equipment for displaying motor vehicle noise emissions
DE102006016446A1 (en) 2006-04-07 2007-10-11 Robert Bosch Gmbh Method for testing the functionality of an exhaust gas arrangement in an internal combustion engine comprises using deviations of control parameters of a control device from a prescribed value to judge the functionality of the arrangement
DE102016116671A1 (en) 2015-09-11 2017-03-16 GM Global Technology Operations LLC Vehicle diagnosis based on vehicle sounds and vibrations
DE102019212795A1 (en) 2019-08-27 2021-03-04 Zf Friedrichshafen Ag Method for detecting increased noise emissions from a vehicle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4336022A1 (en) * 2022-09-09 2024-03-13 Robert Bosch GmbH Device and method for diagnosing a manipulation of an exhaust line of an internal combustion engine
DE102022209450A1 (en) 2022-09-09 2024-03-14 Robert Bosch Gesellschaft mit beschränkter Haftung Device and method for diagnosing manipulation of an exhaust system of an internal combustion engine

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