WO2022175021A1 - Detektion eines abbrands in einer sauganlage - Google Patents
Detektion eines abbrands in einer sauganlage Download PDFInfo
- Publication number
- WO2022175021A1 WO2022175021A1 PCT/EP2022/051469 EP2022051469W WO2022175021A1 WO 2022175021 A1 WO2022175021 A1 WO 2022175021A1 EP 2022051469 W EP2022051469 W EP 2022051469W WO 2022175021 A1 WO2022175021 A1 WO 2022175021A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- determined
- vehicle drive
- engine
- intake system
- value
- Prior art date
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 92
- 238000001514 detection method Methods 0.000 title description 8
- 238000000034 method Methods 0.000 claims abstract description 34
- 238000006243 chemical reaction Methods 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 5
- 230000001419 dependent effect Effects 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 37
- 239000000446 fuel Substances 0.000 description 13
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 10
- 229910052760 oxygen Inorganic materials 0.000 description 10
- 239000001301 oxygen Substances 0.000 description 10
- 239000000203 mixture Substances 0.000 description 8
- 239000004071 soot Substances 0.000 description 6
- 239000000523 sample Substances 0.000 description 5
- 230000007613 environmental effect Effects 0.000 description 3
- 239000011261 inert gas Substances 0.000 description 3
- 230000003197 catalytic effect Effects 0.000 description 2
- 238000003745 diagnosis Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
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
- F02D41/0002—Controlling intake air
-
- 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
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D41/1454—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio
- F02D41/1456—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio with sensor output signal being linear or quasi-linear with the concentration of oxygen
-
- 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
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D41/1454—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio
- F02D41/1458—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio with determination means using an estimation
Definitions
- the invention relates to a method for diagnosing a state and/or control of an internal combustion engine, in particular for detecting and/or determining a burn-off, in particular a soot burn-off, in an intake system of the internal combustion engine, as well as a control means for carrying out such a method and a vehicle drive with an internal combustion engine, an intake system, an exhaust system and such a detection means.
- a diagnosis of leaks that occur is a desirable functionality of a modern vehicle drive.
- a diagnosis is only possible with a high level of reliability if the diagnostic means works on the basis of correct detection or calculation of a relative engine charge (depending on the engine type, also referred to as volumetric efficiency and/or air volume).
- the relative engine charge is determined in modern engine control devices or engine routines as a function of operating states, which do not reflect the changed conditions during combustion - taking into account load cases, operating and/or environmental conditions, but still based on regular operation.
- the relative engine filling can often not be determined with sufficient accuracy in the event of a burn-up.
- a method for diagnosing and/or controlling a vehicle drive which has at least one internal combustion engine, an air collector and an exhaust gas duct.
- the vehicle drive has exhaust gas recirculation, in particular from the exhaust gas duct to the air collector.
- the method is carried out to detect and/or determine a burn-off in the intake system and has one, several or all of the following method steps, which can be carried out in the specified order or in another suitable order:
- the difference is determined by a difference between the theoretical combustion air ratio and the measured combustion air ratio.
- the difference quantity can, for example, also specify a size ratio of the theoretically determined and measured combustion air ratio to one another and/or an absolute or relative difference value of the two determined combustion air ratios.
- the theoretical and/or the measured combustion air ratio represents in particular an excess of fuel or an excess of oxygen in a fuel-air mixture, based on a stoichiometric ratio (in particular of 1) at which all of the fuel and all of the oxygen in the mixture are completely combined react so that after ignition neither excess fuel nor oxygen remains or is detectable in the exhaust gases.
- the determined value of the differential variable can be used to detect whether burn-off is taking place in the intake system, in particular by storing for certain values of the differential variable, for example in a lookup table of a control means of the vehicle drive, that this value is for a possibly characterized in more detail in the lookup table, burnup is representative, or indicates that there is no relevant burnup.
- a control device in particular a detection and/or determination device, for detecting and/or determining erosion in an intake system of an internal combustion engine is disclosed, which is set up to carry out a method according to an embodiment of the invention.
- a vehicle drive comprising an internal combustion engine, an intake system and an exhaust system is disclosed. The vehicle drive has a control means according to an embodiment of the invention.
- the vehicle drive also has an exhaust gas recirculation line, which is set up to connect the exhaust system to the intake system in a gas-carrying manner.
- the invention and the associated possibility of detecting burn-up during regular operation of the internal combustion engine is particularly helpful. This is because the recirculated exhaust gas can reach significantly higher temperatures than the compressed but cooled fresh air that is supplied, even if the recirculated exhaust gas has passed through an EGR cooler.
- EGR exhaust gas recirculation
- the air collector of the intake system - into which the EGR line flows - is often made of a plastic material, which is why under very unfavorable operating conditions, for example with high ambient temperatures and a permanent full load of the internal combustion engine, leaks, for example due to the temperature input of the recirculated exhaust gases and an associated Soot burn-off in a plastic air collector Leaks can occur, especially if there is already a certain amount of sooting in the most heavily used wall sections.
- the invention is based, among other things, on the consideration that the relative engine charge is a central input variable for many engine functions.
- An exact determination of the engine filling is of central importance, especially for diagnosing the air system (e.g. when detecting leaks).
- the temperature of the mass flow drawn in by the engine e.g. fresh air including any EGR
- deposits e.g. soot
- This energy input is included in the calculation not taken into account, which greatly falsifies the calculated engine filling in the event of a burn-up.
- the invention is now based, among other things, on the idea of taking into account the temperature increase in the event of a burn-off in the intake system, in particular a soot burn-off, as follows:
- the lambda value of the exhaust gas (i.e. the measured combustion air ratio) is measured with the help of a lambda probe, especially in the exhaust gas duct after the turbocharger.
- the measured lambda value takes into account the amount of fuel burned and any deposits that may have burned off in the intake system.
- a theoretical lambda value i.e. theoretical air/fuel ratio
- a theoretical lambda value can be calculated using the injected fuel quantity and the intake fresh air mass (based on the fresh air mass meter), in particular using operating models of the vehicle drive.
- both lambda values - the measured and the calculated one - are the same; at least apart from model and/or sensor inaccuracies.
- the control means predetermines up to which relative and/or absolute difference (e.g. in the sense of a predefined threshold value) between the calculated and the measured lambda value no combustion, but a measurement deviation or the like is interpreted and is thus detected.
- the lambda values are not equal (and deviate from each other by more than the threshold value); the difference can be converted into a theoretical (e.g. soot) amount burned off. From this, a heat output can be determined, which is taken into account in an, in particular model-based, temperature calculation of the intake mass flow. This significantly increases the accuracy of the calculation of the engine filling in the event of a burn-up.
- burn-off in the intake system is detected when the difference variable shows and/or a particularly relevant deviation between the theoretically determined value and the measured value
- regular operation in the intake system is detected if the difference variable shows no or no relevant deviation between the theoretically determined and the measured value.
- the influence of combustion on the real lambda value of the exhaust gases in the exhaust gas duct which is not stored in the operating models of the internal combustion engine and/or the vehicle drive, can be detected, and in particular its difference to the model-based, i.e. theoretical, determined lambda value.
- Controlled operation is to be understood in particular as meaning that operation takes place at least essentially in the way that is modeled for this operating state with regard to the model variables used, in particular also the combustion air ratio, in the operating models of the vehicle drive.
- the differential variable indicates a burnup when the theoretical combustion air ratio results in leaner operation than the measured combustion air ratio.
- the theoretical air/fuel ratio is determined by a model-based calculation, which includes assumptions stored in the model about relationships between a temperature in the air collector and a composition of the exhaust gases from combustion during regular operation of the internal combustion engine in a specific operating state.
- a combustion quantity is determined as a function of a determined value of the difference variable.
- the amount burned can be calculated directly from the difference between the two lambda values.
- suitable substitute reactions for adjusting an engine filling can be selected and/or taken directly or indirectly, for example opening the EGR valve, whereby the air plenum is filled with inert gas, the possible fire is deprived of oxygen and the fire is extinguished becomes.
- a heating capacity in the air collector is determined as a function of a determined value of the differential variable and/or a determined combustion quantity.
- the heat output can be calculated directly using the calorific value and the amount burned.
- an assumption about the calorific value may be necessary. Since the exact composition of the fuel is not known in the exemplary embodiment, pure carbon is assumed here, which is sufficient in relation to the accuracy required.
- suitable substitute reactions for adapting an engine charge can be selected and/or taken directly or indirectly.
- a danger threshold which can be stored, for example, in the engine control system, in particular in the detection means
- an instruction to the driver to stop immediately and/or switch off can be given, for example the internal combustion engine take place.
- a temperature in particular a temperature increase compared to a model-based temperature value for the operating state of the internal combustion engine under consideration, determined in the air collector.
- the temperature increase can be calculated directly with the help of the air mass flow.
- suitable substitute reactions for adapting an engine charge can be selected and/or taken directly or indirectly.
- an engine filling in particular a change in the engine filling in comparison to a model-based value of the engine filling for the operating state of the internal combustion engine under consideration, is determined in the air collector.
- a suitability and/or a scope of required substitute reactions for the adaptation can be determined and/or the corresponding substitute reactions can be taken to the required extent.
- a substitute reaction for adapting an engine charge is selected and/or taken as a function of a determined value of the difference variable or a variable determined as a function thereof.
- FIG. 1 shows a vehicle drive with a control means according to an exemplary embodiment of the invention.
- Fig. 2 shows a flowchart with method steps of a method according to an exemplary embodiment of the invention, carried out on the vehicle drive from Fig. 1.
- Fig. 1 shows a vehicle drive 1 having an internal combustion engine 2.
- the internal combustion engine 2 is a four-cylinder diesel engine in the exemplary embodiment educated.
- the internal combustion engine 2 is connected to an intake system 4 for the supply of oxygen and to an exhaust system 6 for cleaning the exhaust gases.
- the intake system 4 has a fresh air duct 8 , a charge air cooler 10 , a throttle valve 12 and an air collector 14 .
- the exhaust system 6 has an exhaust manifold 18 along an exhaust duct 16 and an exhaust gas aftertreatment arrangement 20 which has at least one three-way catalytic converter, but in particular has further aftertreatment devices such as at least one particle filter and/or at least one SCR catalytic converter.
- a two-stage exhaust gas turbocharger 22 is arranged in the fresh air duct 8 of the intake system 4 and in the exhaust gas duct 16 of the exhaust system 6, with the compressor of the exhaust gas turbocharger 22 in the fresh air duct 8 and the turbine of the exhaust gas turbocharger 22 in the exhaust gas duct 16 are arranged.
- the high-pressure compressor and the high-pressure turbine of the exhaust gas turbocharger 22 can each be bypassed by means of a switchable bypass.
- the intake system 4 and the exhaust system 6 can be connected by means of a switchable high-pressure EGR line 24, so that hot exhaust gas can be routed from the exhaust manifold 17 into the air collector 14 and mixed with the fresh air there.
- the exhaust gases in the EGR line 24 can be guided in a switchable manner through an EGR cooler and/or past it.
- a hot-film air mass meter HFM for measuring an air mass flow mHFM and a temperature sensor for measuring a fresh air temperature T10 are arranged at a fresh air inlet 7 of the fresh air duct 8 .
- a pressure sensor for measuring a compression pressure p12 in the fresh air duct is arranged between the two compressors.
- a temperature sensor for measuring a pre-throttle temperature T21 in the fresh air duct is arranged between the intercooler 10 and the throttle valve 12 .
- a pressure sensor for measuring a boost pressure p22 is arranged in the air collector 14.
- a temperature sensor for measuring an EGR mixture temperature T-nAGR upon entry into the air collector 14 is arranged in the EGR line 24 .
- a pressure sensor for measuring a pre-turbine pressure p31 is arranged in the exhaust manifold 17 .
- a lambda probe 26 for measuring a mixture composition of the exhaust gases before they enter the exhaust gas aftertreatment arrangement 20 .
- the vehicle drive 1 also has an engine controller 30 which is set up to control the vehicle drive 1 and all of its components in accordance with the operating requirements of the motor vehicle.
- the engine controller 30 is also set up to take measured values from all the above-mentioned sensors into account for optimal control of the vehicle drive and its components, as well as to access conventional operating models, lookup tables, etc., if necessary using the recorded and/or processed ones sensor values.
- the engine controller 30 has a control, detection and determination means 32 (hereinafter referred to as control means 32 for short), which is set up to carry out an exemplary method for detecting and determining a burn-off, in particular a soot burn-off, in the intake system 4 and, if necessary To select and, if necessary, to take alternative reactions when combustion is detected.
- the engine controller 30 and/or the control means 32 is set up to use operating models 34 of the vehicle, the vehicle drive and/or the at least one drive motor that are typically stored in current motor vehicles, i.e. in particular data, sensor values, Only use lookup tables 36 and/or model predictions within the meaning of the invention.
- step S10 an operating state is determined BZ of the vehicle drive 1, which is defined by the required load case and the existing operating and environmental conditions.
- the determination is based on operating models which are known per se and are not shown here and which the motor controller 30 can access.
- step S20 a theoretical combustion air ratio of the internal combustion engine is determined for the specific operating state, in that the planned fresh air mass, possibly the planned EGR mass (with modeled oxygen content) and the planned fuel injection quantity are moderated and set in relation to one another.
- step S30 a measured combustion air ratio X s is determined in the exhaust gas duct 6 by means of the lambda probe 26 arranged there.
- a difference variable X is determined in step S40.
- a size ratio of the theoretical combustion air ratio I ( and the measured combustion air ratio X s to one another is determined in order to determine the difference variable.
- step S52 regular operation R is detected in the intake system 4 if the difference variable X shows no or no relevant deviation between the theoretically determined and the measured lambda value, in this case the size ratio X is between 0.8 and 1.2.
- the method is performed again at time t n after a predetermined time interval At has elapsed.
- step S51 a burn-off A in the intake system 4 is detected if the determined value of the size ratio X of the two lambda values is less than 0.8 or greater than 1.2.
- the size ratio X is calculated in such a way that the difference shows a burn-off if the theoretical combustion air ratio lt shows leaner operation than the measured combustion air ratio s .
- burnup causes a gas temperature T22 + DT in the air plenum that is increased by a temperature contribution DT of the burnup, so that an engine filling RF of the cylinders with oxygen turns out to be lower than for the lower, modeled (and correspondingly also approximately actually occurring) charging temperature T22 in a regular operation R; which in turn can cause an excess of fuel during combustion in the cylinder, which causes an air-fuel ratio measured in the exhaust gas that is richer than predicted or assumed by the air-fuel ratio calculated theoretically on the basis of the model.
- step S61 depending on the determined value of the differential variable X, taking into account the current operating point BP (e.g. in the form of at least two of the following variables: the ac tual fresh air mass, the current injection quantity, the measured lambda value) a burned quantity m R is determined. In the exemplary embodiment, this is done using a lookup table 36 that is filled experimentally.
- a difference between the absolute values of the theoretical combustion air ratio l ( and the measured combustion air ratio s can also be determined in the sense of the exemplary embodiment.
- step S62 a heating output Q in the air collector 14 is then determined as a function of the determined combustion quantity m R . In the exemplary embodiment, this is done using a lookup table 36 that is filled experimentally.
- step S63 a temperature increase DT in comparison to the model-based determined temperature value T22 for the observed operating state BZ of the internal combustion engine is determined in the air collector as a function of the heat output Q determined in the air collector 14 . In the exemplary embodiment, this is done using a lookup table 36 that is filled experimentally.
- an engine charge RF is determined as a function of the charging temperature T22 and the temperature increase DT in the air plenum 14, and thus also a change in the engine charge compared to a model-based value of the engine charge for the operating state BZ of the internal combustion engine 2 under consideration.
- a suitability and a scope of required substitute reactions for adapting the engine filling are determined and the corresponding replacement reactions are taken to the required extent.
- the substitute reactions are controlled by means of the control means 30.
- the substitute reactions available for selection can be selected independently of the invention.
- opening the EGR valve comes into consideration in order to fill the air collector with inert gas, to remove the oxygen from the possible fire and to extinguish the fire.
- a possible substitute reaction could be opening the EGR valve, for example.
- the air collector is filled with inert gas, the oxygen is withdrawn from the possible fire and the fire is extinguished.
- the method is carried out again at time t n after a predetermined time interval At has elapsed.
- T-nAGR EGR mixture temperature hs measured fuel-air ratio lt theoretical, model-based determined fuel-air ratio
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- 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
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP22701378.6A EP4295023A1 (de) | 2021-02-22 | 2022-01-24 | Detektion eines abbrands in einer sauganlage |
KR1020237018111A KR20230096081A (ko) | 2021-02-22 | 2022-01-24 | 흡입 시스템 내에서의 연소 검출 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102021104061.2A DE102021104061B3 (de) | 2021-02-22 | 2021-02-22 | Detektion eines Abbrands in einer Sauganlage |
DE102021104061.2 | 2021-02-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022175021A1 true WO2022175021A1 (de) | 2022-08-25 |
Family
ID=80122854
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2022/051469 WO2022175021A1 (de) | 2021-02-22 | 2022-01-24 | Detektion eines abbrands in einer sauganlage |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP4295023A1 (de) |
KR (1) | KR20230096081A (de) |
DE (1) | DE102021104061B3 (de) |
WO (1) | WO2022175021A1 (de) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102016211232A1 (de) * | 2016-06-23 | 2017-12-28 | Robert Bosch Gmbh | Verfahren zum Erkennen von Rußablagerungen in einem Lufteinlassbereich eines Verbrennungsmotors |
DE102018201683A1 (de) * | 2018-02-05 | 2019-08-08 | Bayerische Motoren Werke Aktiengesellschaft | Verfahren zur Bestimmung einer Leckage in einer Ansaugluftführung eines Verbrennungsmotors |
DE102018126693A1 (de) * | 2018-10-25 | 2020-04-30 | Bayerische Motoren Werke Aktiengesellschaft | Verfahren zur Erkennung einer Verkokung im Einlasstrakt eines Verbrennungsmotors |
DE102018126692A1 (de) * | 2018-10-25 | 2020-04-30 | Bayerische Motoren Werke Aktiengesellschaft | Verfahren zur Erkennung einer Verkokung im Einlasstrakt eines Verbrennungsmotors mit Kraftstoffdirekteinspritzung |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3827978A1 (de) | 1987-11-10 | 1989-05-18 | Bosch Gmbh Robert | Verfahren und vorrichtung fuer stetige lambdaregelung |
DE19501458B4 (de) | 1995-01-19 | 2009-08-27 | Robert Bosch Gmbh | Verfahren zur Adaption der Warmlaufanreicherung |
WO2007098780A1 (de) | 2006-02-28 | 2007-09-07 | Bayerische Motoren Werke Aktiengesellschaft | Verfahren zur regelung des kraftstoff-luft-gemisches bei einer verbrennungsmashine |
DE102009028111A1 (de) | 2009-07-30 | 2011-02-03 | Robert Bosch Gmbh | Verfahren zum Schutz einer Brennkraftmaschine |
DE102015011867B4 (de) | 2015-09-10 | 2018-10-04 | Audi Ag | Verfahren zum Betreiben einer Antriebseinrichtung sowie entsprechende Antriebseinrichtung |
-
2021
- 2021-02-22 DE DE102021104061.2A patent/DE102021104061B3/de active Active
-
2022
- 2022-01-24 EP EP22701378.6A patent/EP4295023A1/de active Pending
- 2022-01-24 KR KR1020237018111A patent/KR20230096081A/ko unknown
- 2022-01-24 WO PCT/EP2022/051469 patent/WO2022175021A1/de active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102016211232A1 (de) * | 2016-06-23 | 2017-12-28 | Robert Bosch Gmbh | Verfahren zum Erkennen von Rußablagerungen in einem Lufteinlassbereich eines Verbrennungsmotors |
DE102018201683A1 (de) * | 2018-02-05 | 2019-08-08 | Bayerische Motoren Werke Aktiengesellschaft | Verfahren zur Bestimmung einer Leckage in einer Ansaugluftführung eines Verbrennungsmotors |
DE102018126693A1 (de) * | 2018-10-25 | 2020-04-30 | Bayerische Motoren Werke Aktiengesellschaft | Verfahren zur Erkennung einer Verkokung im Einlasstrakt eines Verbrennungsmotors |
DE102018126692A1 (de) * | 2018-10-25 | 2020-04-30 | Bayerische Motoren Werke Aktiengesellschaft | Verfahren zur Erkennung einer Verkokung im Einlasstrakt eines Verbrennungsmotors mit Kraftstoffdirekteinspritzung |
Also Published As
Publication number | Publication date |
---|---|
DE102021104061B3 (de) | 2022-07-07 |
KR20230096081A (ko) | 2023-06-29 |
EP4295023A1 (de) | 2023-12-27 |
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