CN102791995A - Method for testing the functionality of an exhaust gas recirculation valve of an internal combustion engine - Google Patents
Method for testing the functionality of an exhaust gas recirculation valve of an internal combustion engine Download PDFInfo
- Publication number
- CN102791995A CN102791995A CN201180015142XA CN201180015142A CN102791995A CN 102791995 A CN102791995 A CN 102791995A CN 201180015142X A CN201180015142X A CN 201180015142XA CN 201180015142 A CN201180015142 A CN 201180015142A CN 102791995 A CN102791995 A CN 102791995A
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- CN
- China
- Prior art keywords
- signal
- exhaust gas
- gas recirculation
- measurement signal
- recirculation valve
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- 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.)
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Classifications
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- 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
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D41/0047—Controlling exhaust gas recirculation [EGR]
- F02D41/005—Controlling exhaust gas recirculation [EGR] according to engine operating conditions
- F02D41/0055—Special engine operating conditions, e.g. for regeneration of exhaust gas treatment apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/12—Other methods of operation
- F02B2075/125—Direct injection in the combustion chamber for spark ignition engines, i.e. not in pre-combustion chamber
-
- 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
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/26—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using computer, e.g. microprocessor
- F02D41/28—Interface circuits
- F02D2041/286—Interface circuits comprising means for signal processing
- F02D2041/288—Interface circuits comprising means for signal processing for performing a transformation into the frequency domain, e.g. Fourier transformation
-
- 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
- F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
- F02D41/1408—Dithering techniques
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/49—Detecting, diagnosing or indicating an abnormal function of the EGR system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10373—Sensors for intake systems
- F02M35/1038—Sensors for intake systems for temperature or pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10373—Sensors for intake systems
- F02M35/10386—Sensors for intake systems for flow rate
-
- 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)
- Exhaust-Gas Circulating Devices (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Testing Of Engines (AREA)
Abstract
The invention relates to a method for testing the functionality of an exhaust gas recirculation valve (13) of an internal combustion engine (1). The position of an actuator (13a) of the exhaust gas recirculation valve (13) is periodically changed, and a system variable (LM, LD) that is influenced by the movement of the actuator (13a) is measured. The measured signal is analyzed in order to test the functionality of the exhaust gas recirculation valve (13).
Description
Technical field
The present invention relates to a kind of method of function of the exhaust gas recirculation valve that is used to check internal-combustion engine.
Background technique
Exhaust gas recirculation valve (AGR valve) is used in the internal-combustion engine, be used for suction tude produce the mixture that constitutes by fresh air and the waste gas that is reclaimed and like this especially fuel consumption minimize and discharge minimize aspect the improvement combustion characteristic.Prevent the NOx discharging such as said exhaust gas recirculation.For the exhaust gas recirculation from the outlet pipe to the suction tude, the exhaust gas recirculation valve that use can be regulated continuously and adjust its open position.But in running because pollute, carbon film forms, aging or the like especially depart from the deviation of nominal position through physical location and the interference of function can occur.This produces adverse influence to burning.
Therefore what be worth pursuing is, can be easily and check the function of exhaust gas recirculation valve reliably.
Summary of the invention
By the present invention, a kind of method with the said characteristic of claim 1 is proposed.Favourable design proposal is the theme of dependent claims and following explanation.
The present invention is basically based on such measure, promptly exported by this system that influences to the signal of the regulator loading cycle property modulation of AGR valve and at the frequency range inner analysis, such as the signal of boost-pressure sensor or the signal of air mass sensor.Said method not only can be still in the range of operation of the broad of motor and can dynamically be used and can satisfy like this requirement of continuous diagnosis.The scheme that proposed just can be enough with the original sensor and the final controlling element that are installed in bulk in the Motor Vehicle that just exists, thereby do not produce the sensing device that is used for other or the extra cost of actuator or controller hardware.When implementing said method continuously, can check the function of said exhaust gas recirculation valve at any time.For the less modulation of said regulated signal, be regarded as linear relation like can be with carbon black/NOx close.Although this method is intervened said AGR adjustment thus in principle, discharging is not produced the influence of being worth mentioning, this makes the present invention in fact using particularly well.The present invention is suitable for having the internal-combustion engine of igniting voluntarily or external source ignition structure.
As periodic regulated signal, can use the signal or the rectangular signal of sinusoidal.Rectangular signal can illustrate than sinusoidal signal when scan rate is low better.But every kind of periodic signal all is suitable for modulating in principle.
What be fit to is, calculates the mean value (lower pass-filter) of the slip of said measurement signal and from said measurement signal, deducts this mean value, is used to improve the robustness of diagnosis.
Fourier analysis or locking (Lock-In) method can be used for measurement signal is analyzed.The method of the phase sensitive especially extra advantage of locking means is, comes directly to measure the characteristic curve of controlled system thus according to the regulator position.For function is assessed, then only must it seems the characteristic curve gradient is monitored by predetermined threshold value.Thus as replenishing of the constraint (Schwerg ngigkeit) of said AGR valve also can discern reliably controlled system characteristic such as through aging Returnning spring, be covered with cigarette ash valve, distort and analogue and the variation that possibly occur.
Especially can on program technic, be provided for implementing by the controller of computing unit of the present invention by method of the present invention such as Motor Vehicle.
Other advantage of the present invention and design proposal obtain from specification and accompanying drawing.
Self-evident, the above-mentioned and following characteristic that also will explain not only can be used in corresponding illustrated combination, and can in other combination or individually, use, and does not leave scope of the present invention.
Description of drawings
Below by means of the schematically illustrated in the accompanying drawings the present invention of embodiment and describe the present invention with reference to the accompanying drawings, wherein:
Fig. 1 is the schematic representation with internal-combustion engine of controller; And
Fig. 2 is the schematic representation by the flow chart of a kind of different replacement scheme preferred embodiment of method of the present invention.
Embodiment
Fig. 1 shows internal-combustion engine 1, and piston 2 can move up and down in cylinder 3 for this internal-combustion engine.This cylinder 3 is provided with firing chamber 4, and suction tude 6 is connected on the said firing chamber 4 through valve 5 with outlet pipe 7.Said suction tude 6 is connected with said outlet pipe 7 through the exhaust gas recirculation valve 13 with valve cap 13a, and said valve cap is with acting on the regulating mechanism that carries out outside exhaust gas recirculation.Said valve cap 13a can be triggered by controller (ECU) 16 by enough signal EGR.In addition, the injection valve 8 that triggers of enough signal TI of ability is connected with said firing chamber 4 with the spark plug 9 that an enough signal ZW of ability triggers.The internal-combustion engine 1 of pressing claim 1 is based on the external source methods of printing.But clarify, the present invention is not depended on the ignition method of internal-combustion engine and is well suited for having the internal-combustion engine of ignition structure voluntarily yet.
In said suction tude 6, settled boost-pressure sensor 18 and closure 12, wherein said boost-pressure sensor 18 sends the signal LD of the boost pressure that demonstrates in the suction tude and the rotational position of said closure 12 can be regulated by means of signal DK.For having turbo charged motor, between said air mass sensor 10 and said closure 12, arranged the compressor of turbosupercharger.
In addition, said suction tude 6 is provided with air mass sensor 10 and said outlet pipe 7 is provided with lambda sensor 11.Said air mass sensor 10 is measured the air quality of the fresh air that flows to said suction tude 6 and is produced signal LM in view of the above.Said lambda sensor 11 is measured the oxygen content of the waste gas in the said outlet pipe 7 and is produced signal air coefficient (λ) in view of the above.Arranged that in said lambda sensor 11 back the venting gas appliance (not shown) comprises that catalyst converter is such as ternary catalyzing unit.For having turbo charged motor, the turbo machine of turbosupercharger has been installed in the back of said lambda sensor.
Be in operation through driven piston, bent axle 14 placed rotatablely move, through the wheel of the said final driving machine motor-car that rotatablely moves.
Self-evident, have external source igniting or voluntarily the internal-combustion engine of ignition structure can have more than one cylinder, said cylinder is distributed to same bent axle and same outlet pipe and is formed waste gas row.
In preferred design proposal of the present invention, said valve cap 13a is triggered by said controller 16 and such as boost pressure LD and/or air quality LM are analyzed with the mode of modulation.For this purpose, said controller 16 is provided with microprocessor, and this microprocessor has been preserved program in storage medium especially ROM (read-only memory) (ROM), and said program is suitable for implementing the control and/or the adjustment of the integral body of internal-combustion engine 1.Said controller 16 is provided for implementing by method of the present invention.
Load input signal to said controller 16, said input signal is being represented the measured operation parameter of internal-combustion engine by means of sensor.Be connected with boost-pressure sensor 18 with said air mass sensor 10, lambda sensor 11 such as said controller 16.In addition, said controller 16 is connected with accelerator pedal sensor 17, and this accelerator pedal sensor produces signal FP, and this signal FP shows and can and show the desired moment by the driver thus by the position of driver-operated accelerator pedal.Said controller 16 produces the output signal, utilizes said output signal can influence the state of internal-combustion engine 1 through final controlling element according to desired control and/or adjustment situation.Be connected with closure 12 and be produced as it is triggered necessary signal EGR, TI, ZW and DK with said AGR valve 13, injection valve 8, spark plug 9 such as said controller 16.
By means of Fig. 2 the flow process by the multiple preferred replacement scheme of method of the present invention is made an explanation below.These mode of executions can be the basis with the internal-combustion engine by Fig. 1.Shown step is not necessarily successively carried out, but also can carry out simultaneously in time.
Said method begins in optional step 101, and the corresponding release conditions of inspection exists situation and start-up function inspection method functional diagnosis method in other words in case of necessity in this step 101.
In step 102, encourage the regulator 13a of said AGR valve 13 with periodic signal with predetermined amplitude and frequency, that is to say the modulation signal that on normal regulated signal, superposeed.Said modulation signal can preferably be configured to sinusoidal or be configured to rectangle according to 103b according to 103a.But clarify, can use every kind periodically to be used to the signal modulated in principle.
In the step 104 of carrying out simultaneously basically; Measurement receives said the regulator adjustment movement of regulating mechanism 13a or the system parameter of position effects in other words, and wherein said system parameter can be that air-quantity measuring meter 10 can be the measurement signal LD of boost-pressure sensor 18 such as the measurement signal LM of hotting mask air-quantity measuring meter or according to 105b according to 105a advantageously.Here also to clarify, can measure the system parameter of the influence of each adjustment movement that receives said regulator 13a in principle.
In optional step 106 subsequently, calculate by means of low-pass filter said measurement signal slip mean value and in step 107, from original measurement signal, deduct the mean value of said slip, be used to improve the robustness of said diagnosis.
As new measurement signal said subtraction result is analyzed subsequently, be suitable wherein and be suitable according to the locking means of 108b phase sensitive according to the 108a Fourier analysis.
When carrying out Fourier analysis, Fourier spectrum is studied with regard to the situation of energizing frequency that obviously high amplitude occurs than adjacent amplitude according to 108a.This can carry out by means of threshold ratio.
For the locking means of pressing 108b, measured characteristic curve gradient and predetermined characteristic curve gradient are compared.This can carry out by means of threshold ratio equally.Advantageously in measurement signal, modulation frequency is detected selectively at this.Fixed phase relation through between modulation and the measurement signal can realize good noise suppression at this.Obtain possibility that the characteristic curve steepness of said regulator is checked extraly, because the output signal of lock-in amplifier and said characteristic curve gradient are proportional.Thereby for the regulator with characteristic of nonlinear curve, can check, whether also in the desired position that in fact within given in advance boundary, has reached said regulator.
In step 109, implementing sign by means of corresponding result forms (sign such as about particular time interval relevant frequency being carried out integration or other type forms) and in step 110, implements sign at last and analyze Fault Identification in other words.This analysis such as through with the peculiar threshold value of applicable cases between comparison (bigger/littler/as to equate) perhaps ask poor (result's symbol) to carry out, be used to infer function normal condition or failure condition.Can discern out of order or normally functioning exhaust gas recirculation valve thus.
Claims (8)
1. be used to check the method for function of the exhaust gas recirculation valve (13) of internal-combustion engine (1),
The position (103a, 103b) of the regulating mechanism (13a) of the said exhaust gas recirculation valve of periodically-varied (13) wherein,
To the system parameter (LM, LD) of the motional effects that receives said regulating mechanism (13a) measure (105a, 105b) and
Said measurement signal is analyzed the function (106-110) to check said exhaust gas recirculation valve (13).
2. by the described method of claim 1, wherein measure boost pressure (LD) or air quality (LM) in the suction tude (6) as system parameter.
3. by claim 1 or 2 described methods, wherein, uses said measurement signal Fourier transformation (108a) for being analyzed.
4. by each described method in the aforementioned claim, the method for wherein using phase sensitive for said measurement signal is analyzed is locking means (108b) especially.
5. by each described method in the aforementioned claim, wherein before analyzing, especially said measurement signal is carried out filtering (106) by means of lower pass-filter.
6. by the described method of claim 5, wherein when filtering, form the mean value (106) of the slip of said measurement signal and before analyzing, from original measurement signal, deduct the mean value (107) of said slip and said subtraction result is analyzed as new measurement signal.
7. by each described method in the aforementioned claim, wherein use the signal or the rectangular signal (103a, 103b) of sinusoidal as periodic regulated signal.
8. computing unit, this computing unit are provided for implementing by each described method in the aforementioned claim.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102010003203.4 | 2010-03-24 | ||
| DE102010003203A DE102010003203A1 (en) | 2010-03-24 | 2010-03-24 | Method for testing the functionality of an exhaust gas recirculation valve of an internal combustion engine |
| PCT/EP2011/053871 WO2011117108A1 (en) | 2010-03-24 | 2011-03-15 | Method for testing the functionality of an exhaust gas recirculation valve of an internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102791995A true CN102791995A (en) | 2012-11-21 |
| CN102791995B CN102791995B (en) | 2016-03-30 |
Family
ID=43799450
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201180015142.XA Active CN102791995B (en) | 2010-03-24 | 2011-03-15 | For checking the method for the function of the exhaust gas recirculation valve of internal-combustion engine |
Country Status (5)
| Country | Link |
|---|---|
| CN (1) | CN102791995B (en) |
| BR (1) | BR112012024042B1 (en) |
| DE (1) | DE102010003203A1 (en) |
| RU (1) | RU2560091C2 (en) |
| WO (1) | WO2011117108A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107939534A (en) * | 2016-10-12 | 2018-04-20 | 罗伯特·博世有限公司 | Method and controller based on calibrating and diagnosing exhaust gas recycling mass flow measurement |
| CN112539121A (en) * | 2020-11-27 | 2021-03-23 | 潍柴动力股份有限公司 | Carbon deposition online detection method and detection device of EGR system and motor vehicle |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6607320B2 (en) * | 2016-09-07 | 2019-11-20 | 日産自動車株式会社 | ENGINE CONTROL METHOD AND CONTROL DEVICE |
| GB2570335B (en) | 2018-01-22 | 2020-03-11 | Ford Global Tech Llc | An exhaust gas recirculation valve control method |
| GB2570336B (en) | 2018-01-22 | 2020-03-04 | Ford Global Tech Llc | An exhaust gas recirculation valve diagnostic method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5508926A (en) * | 1994-06-24 | 1996-04-16 | General Motors Corporation | Exhaust gas recirculation diagnostic |
| US5996337A (en) * | 1998-02-06 | 1999-12-07 | Engelhard Corporation | Dynamic calorimetric sensor system |
| DE10025133A1 (en) * | 2000-05-20 | 2001-12-06 | Volkswagen Ag | Method for controlling a motor vehicle exhaust gas recirculation system, diverts a partial amount of exhaust gas from an exhaust gas branch in an internal combustion engine (ICE) feeding it to combustion air in the ICE via a suction unit |
| US20050161029A1 (en) * | 2004-01-20 | 2005-07-28 | Yosuke Ishikawa | Leakage detecting apparatus for an exhaust gas re-circulating system of an engine |
| DE102009027010A1 (en) * | 2009-06-18 | 2010-12-23 | Robert Bosch Gmbh | Method for diagnosing an actuator of a boost pressure system of an internal combustion engine |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| DE4406281C2 (en) * | 1993-03-01 | 1996-08-22 | Mitsubishi Motors Corp | Method for determining a failure of an exhaust gas recirculation device |
| WO2002101264A2 (en) * | 2001-06-13 | 2002-12-19 | Luk Lamellen Und Kupplungsbau Beteiligungs Kg | Method and system for regulating the torque transmission capacity of a frictionally engaged, torque transmitting assembly |
| DE602004002108T2 (en) * | 2003-04-16 | 2006-12-21 | Westport Research Inc., Vancouver | INTERNAL COMBUSTION ENGINE WITH GAS INJECTION |
| JP4487887B2 (en) * | 2005-09-02 | 2010-06-23 | トヨタ自動車株式会社 | Valve control device for internal combustion engine |
| EP2014946B1 (en) * | 2007-07-12 | 2011-10-26 | Schaeffler Technologies AG & Co. KG | Method for calculating the touch point of an automatic clutch |
| FR2919671B1 (en) * | 2007-08-03 | 2009-10-30 | Sphere Tech Europ Sarl | METHOD FOR DIAGNOSING AN INTERNAL COMBUSTION ENGINE BY EXHAUST GAS ANALYSIS AND DEVICE FOR CARRYING OUT SAID METHOD |
| JP2009221992A (en) * | 2008-03-17 | 2009-10-01 | Denso Corp | Malfunction diagnosing apparatus for exhaust gas sensor |
-
2010
- 2010-03-24 DE DE102010003203A patent/DE102010003203A1/en active Pending
-
2011
- 2011-03-15 BR BR112012024042-0A patent/BR112012024042B1/en active IP Right Grant
- 2011-03-15 RU RU2012145008/07A patent/RU2560091C2/en active
- 2011-03-15 CN CN201180015142.XA patent/CN102791995B/en active Active
- 2011-03-15 WO PCT/EP2011/053871 patent/WO2011117108A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5508926A (en) * | 1994-06-24 | 1996-04-16 | General Motors Corporation | Exhaust gas recirculation diagnostic |
| US5996337A (en) * | 1998-02-06 | 1999-12-07 | Engelhard Corporation | Dynamic calorimetric sensor system |
| DE10025133A1 (en) * | 2000-05-20 | 2001-12-06 | Volkswagen Ag | Method for controlling a motor vehicle exhaust gas recirculation system, diverts a partial amount of exhaust gas from an exhaust gas branch in an internal combustion engine (ICE) feeding it to combustion air in the ICE via a suction unit |
| US20050161029A1 (en) * | 2004-01-20 | 2005-07-28 | Yosuke Ishikawa | Leakage detecting apparatus for an exhaust gas re-circulating system of an engine |
| DE102009027010A1 (en) * | 2009-06-18 | 2010-12-23 | Robert Bosch Gmbh | Method for diagnosing an actuator of a boost pressure system of an internal combustion engine |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107939534A (en) * | 2016-10-12 | 2018-04-20 | 罗伯特·博世有限公司 | Method and controller based on calibrating and diagnosing exhaust gas recycling mass flow measurement |
| CN112539121A (en) * | 2020-11-27 | 2021-03-23 | 潍柴动力股份有限公司 | Carbon deposition online detection method and detection device of EGR system and motor vehicle |
| CN112539121B (en) * | 2020-11-27 | 2022-03-01 | 潍柴动力股份有限公司 | Carbon deposition online detection method and detection device of EGR system and motor vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| BR112012024042B1 (en) | 2020-09-29 |
| BR112012024042A2 (en) | 2016-08-30 |
| RU2560091C2 (en) | 2015-08-20 |
| DE102010003203A1 (en) | 2011-09-29 |
| RU2012145008A (en) | 2014-05-10 |
| WO2011117108A1 (en) | 2011-09-29 |
| CN102791995B (en) | 2016-03-30 |
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