CN102791995B - For checking the method for the function of the exhaust gas recirculation valve of internal-combustion engine - Google Patents
For checking the method for the function of the exhaust gas recirculation valve of internal-combustion engine Download PDFInfo
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- CN102791995B CN102791995B CN201180015142.XA CN201180015142A CN102791995B CN 102791995 B CN102791995 B CN 102791995B CN 201180015142 A CN201180015142 A CN 201180015142A CN 102791995 B CN102791995 B CN 102791995B
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- exhaust gas
- gas recirculation
- recirculation valve
- measurement signal
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- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 19
- 238000005259 measurement Methods 0.000 claims abstract description 20
- 230000001105 regulatory effect Effects 0.000 claims abstract description 12
- 230000007246 mechanism Effects 0.000 claims abstract description 8
- 230000000737 periodic effect Effects 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims 3
- 239000007789 gas Substances 0.000 description 9
- 230000006870 function Effects 0.000 description 8
- 238000003745 diagnosis Methods 0.000 description 4
- 238000010304 firing Methods 0.000 description 3
- 239000002912 waste gas Substances 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
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
-
- 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
-
- 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 present invention relates to a kind of for checking the method for the function of the exhaust gas recirculation valve (13) of internal-combustion engine (1), the wherein position of the regulating mechanism (13a) of exhaust gas recirculation valve described in periodically-varied (13), measures the system parameter (LM, LD) and the function described measurement signal analysis being checked to described exhaust gas recirculation valve (13) that are subject to the impact of the motion of described regulating mechanism (13a).
Description
Technical field
The present invention relates to a kind of method of function of the exhaust gas recirculation valve for checking internal-combustion engine.
Background technique
Exhaust gas recirculation valve (AGR valve) is used in internal-combustion engine, in suction tude, produce the mixture that is made up of fresh air and the waste gas that reclaims and like this especially fuel consumption minimize and discharge minimize in improve combustion characteristic.Such as described EGR prevents NOx emission.For the EGR from outlet pipe to suction tude, use the exhaust gas recirculation valve that can regulate continuously and adjust its open position.But in running, owing to polluting, carbon film formed, aging etc. there will be the interference of function particularly by physical location departs from the deviation of nominal position.This produces adverse influence to burning.
Therefore be worth pursuing, easily and reliably can check the function of exhaust gas recirculation valve.
Summary of the invention
By the present invention, a kind of method with feature described in claim 1 is proposed.Favourable design proposal is the theme of dependent claims and following explanation.
The present invention substantially based on such measure, the signal namely modulated to the regulator loading cycle of AGR valve and exporting in the system that frequency range inner analysis affects by this, the signal of such as boost-pressure sensor or the signal of air mass sensor.Described method in the wider range of operation of motor can not only still and also can dynamically be used and can meet like this continuous print diagnosis requirement.The scheme that proposed with natively exist sensor is in a motor vehicle installed in bulk and final controlling element just can be enough, thus do not produce the extra cost of sensing device for other or actuator or controller hardware.When implementing described method continuously, the function of described exhaust gas recirculation valve can be checked at any time.For the less modulation of described regulated signal, linear relation can be considered as like close for carbon black/NOx.Although the method is intervened described AGR adjustment thus in principle, discharge is not produced to the impact of being worth mentioning, this makes the present invention to be used actually particularly well.The present invention is suitable for the internal-combustion engine with Self-lighting or external source ignition structure.
As periodic regulated signal, signal or the rectangular signal of sinusoidal can be used.Rectangular signal can illustrate than sinusoidal signal better when scan rate is lower.But often kind of periodic signal is all suitable for modulating in principle.
Be applicable to, calculate the mean value (lower pass-filter) of the slip of described measurement signal and deduct this mean value from described measurement signal, for improving the robustness of diagnosis.
Fourier analysis or locking (Lock-In) method may be used for analyzing measurement signal.The extra advantage of the method for phase sensitive especially locking means is, directly measures the characteristic curve of controlled system thus according to regulator position.In order to assess function, then only must be it seems by predetermined threshold value and characteristic curve gradient monitored.Thus as described AGR valve constraint (Schwerg ngigkeit) supplement also can reliably identify controlled system characteristic as by aging Returnning spring, be covered with cigarette ash valve, distort and analogue and the change that may occur.
Especially can arrange in program technic by the controller of computing unit of the present invention such as Motor Vehicle and be used for implementing by method of the present invention.
Other advantage of the present invention and design proposal obtain from specification and accompanying drawing.
Self-evident, feature that is above-mentioned and that also will explain below can not only use in corresponding illustrated combination, and can use in other combination or individually, and does not leave scope of the present invention.
Accompanying drawing explanation
Schematically show the present invention in the accompanying drawings by means of embodiment below and describe the present invention with reference to the accompanying drawings, wherein:
Fig. 1 is the schematic diagram of the internal-combustion engine with controller; And
Fig. 2 is the schematic diagram of the flow chart of a kind of different replacement scheme preferred embodiment by method of the present invention.
Embodiment
Fig. 1 shows internal-combustion engine 1, can move up and down for piston 2 this internal-combustion engine in cylinder 3.This cylinder 3 is provided with firing chamber 4, and suction tude 6 and outlet pipe 7 are connected on described firing chamber 4 by valve 5.Described suction tude 6 is connected with described outlet pipe 7 by the exhaust gas recirculation valve 13 with valve cap 13a, and described valve cap is used as the regulating mechanism carrying out outside EGR.Described valve cap 13a can be triggered by controller (ECU) 16 with signal EGR.In addition, an injection valve 8 that can trigger with signal TI is connected with described firing chamber 4 with a spark plug 9 that can trigger with signal ZW.By the internal-combustion engine 1 of claim 1 based on 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 Self-lighting structure yet.
In described 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 demonstrated in suction tude and the rotational position of described closure 12 can regulate by means of signal DK.For having turbo charged motor, between described air mass sensor 10 and described closure 12, arrange the compressor of turbosupercharger.
In addition, described suction tude 6 is provided with air mass sensor 10 and described outlet pipe 7 is provided with lambda sensor 11.Described air mass sensor 10 measurement flows to the air quality of the fresh air of described suction tude 6 and produces signal LM accordingly.Described lambda sensor 11 is measured the oxygen content of the waste gas in described outlet pipe 7 and is produced signal air coefficient (λ) accordingly.At described lambda sensor 11, arranging venting gas appliance (not shown) comprises catalyst converter such as ternary catalyzing unit below.For having turbo charged motor, after described lambda sensor, the turbo machine of turbosupercharger is installed.
Be in operation by driven piston, bent axle 14 is placed in rotary motion, by the wheel of the final driving machine motor-car of described rotary motion.
Self-evident, have external source igniting or the internal-combustion engine of Self-lighting structure can have more than one cylinder, described 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, described valve cap 13a is triggered by described controller 16 in a modulated manner and such as analyzes boost pressure LD and/or air quality LM.For this purpose, described controller 16 is provided with microprocessor, and this microprocessor saves program in storage medium especially ROM (read-only memory) (ROM), and described program is suitable for control and/or the adjustment of the entirety implementing internal-combustion engine 1.Described controller 16 arranges and is used for implementing by method of the present invention.
Load input signal to described controller 16, described input signal represents the operation parameters measured by internal-combustion engine by means of sensor.Such as described controller 16 is connected with boost-pressure sensor 18 with described air mass sensor 10, lambda sensor 11.In addition, described controller 16 is connected with accelerator pedal sensor 17, and this accelerator pedal sensor produces signal FP, and this signal FP shows to show the moment required by driver by the position of driver-operated accelerator pedal and thus.Described controller 16 produces output signal, utilizes described output signal can be affected the state of internal-combustion engine 1 according to desired control and/or adjustment situation by final controlling element.Such as described controller 16 is connected with described AGR valve 13, injection valve 8, spark plug 9 and closure 12 and is produced as and triggers necessary signal EGR, TI, ZW and DK to it.
By means of Fig. 2, the flow process of the multiple preferred replacement scheme by method of the present invention is made an explanation below.These mode of executions can based on the internal-combustion engine pressing Fig. 1.Shown step is not necessarily successively carried out, but also can carry out in time simultaneously.
Described method starts in optional step 101, and what in this step 101, check corresponding release conditions exists situation and start-up function inspection method functional diagnosis method in other words if desired.
In a step 102, encourage the regulator 13a of described AGR valve 13 with the periodic signal with predetermined amplitude and frequency, that is on normal regulated signal, superposed modulation signal.Described modulation signal can preferably be configured to sinusoidal according to 103a or be configured to rectangle according to 103b.But clarifying, often kind can being used in principle periodically for carrying out the signal modulated.
In the step 104 of substantially simultaneously carrying out, measure and be subject to the system parameter of the described regulator adjustment movement of regulating mechanism 13a or the impact of position in other words, wherein said system parameter can be advantageously the measurement signal LM of air-quantity measuring meter 10 such as hotting mask air-quantity measuring meter according to 105a or can be the measurement signal LD of boost-pressure sensor 18 according to 105b.Here also to clarify, each system parameter being subject to the impact of the adjustment movement of described regulator 13a can be measured in principle.
In optional step 106 subsequently, calculate the mean value of the slip of described measurement signal by means of low-pass filter and from original measurement signal, deduct the mean value of described slip in step 107, for improving the robustness of described diagnosis.
Subsequently subtraction result is analyzed as new measurement signal, be wherein suitable according to 108a Fourier analysis and be suitable according to the locking means of 108b phase sensitive.
When carrying out Fourier analysis according to 108a, the situation with regard to the energizing frequency occurring obviously high than adjacent amplitude amplitude is studied Fourier spectrum.This relatively can carry out by means of threshold value.
For the locking means pressing 108b, measured characteristic curve gradient and predetermined characteristic curve gradient are compared.This relatively can carry out by means of threshold value equally.Advantageously in measurement signal, modulation frequency is detected selectively at this.By the fixing phase relationship between modulation and measurement signal, good noise suppression can be realized at this.Obtain the possibility that the characteristic curve steepness of described regulator is checked extraly because the output signal of lock-in amplifier and described characteristic curve gradient proportional.Thus for having nonlinear characteristic regulator can check within boundary given in advance, whether also reach the position desired by described regulator actually.
Implement sign formation (such as being formed the sign that relevant frequency carries out integration or other type about the specific time lag) and finally implement sign in step 110 to analyze Fault Identification in other words by means of corresponding comparative result in step 109.This analysis is as by with the comparison (larger/less/equal) between threshold value specific to applicable cases or ask poor (symbol of result) to carry out, for inferring function normal condition or failure condition.Out of order or normally functioning exhaust gas recirculation valve can be identified thus.
Claims (8)
1. for checking the method for the function of the exhaust gas recirculation valve (13) of internal-combustion engine (1),
The position (103a, 103b) of the regulating mechanism (13a) of wherein said exhaust gas recirculation valve (13) is applied in the signal of periodic modulation in order to carry out checking,
(105a, 105b) is measured on the system parameter (LM, LD) of impact of periodic modulation of the motion being subject to described regulating mechanism (13a) and
Described exhaust gas recirculation valve (13) function in frequency field (106-110) is checked to described measurement signal analysis, it is characterized in that, the method (108b) of phase sensitive is used in order to analyze described measurement signal, and the periodic modulation selecting the position (103a, 103b) of the regulating mechanism (13a) of described exhaust gas recirculation valve (13) like this, thus the periodic modulation of the position (103a, 103b) of the regulating mechanism (13a) of described exhaust gas recirculation valve (13) can not make a significant impact discharge littlely.
2., by method according to claim 1, the method for wherein said phase sensitive is locking means.
3. by method according to claim 1, wherein as the boost pressure (LD) in system parameter measurement suction tude (6) or air quality (LM).
4., by the method described in claim 1 or 2, wherein before analysis filtering (106) is carried out to described measurement signal.
5., by method according to claim 4, wherein form the mean value (106) of the slip of described measurement signal when filtering and from original measurement signal, deduct the mean value (107) of described slip before analysis and subtraction result is analyzed as new measurement signal.
6., by the method described in claim 1 or 2, wherein use signal or the rectangular signal (103a, 103b) of sinusoidal as periodic regulated signal.
7., by method according to claim 4, wherein by means of lower pass-filter, filtering (106) is carried out to described measurement signal.
8. computing unit, this computing unit arranges and is used for implementing by method in any one of the preceding claims wherein.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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 |
| DE102010003203.4 | 2010-03-24 | ||
| 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 CN102791995A (en) | 2012-11-21 |
| CN102791995B true 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) |
Families Citing this family (5)
| 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 |
| DE102016219781A1 (en) * | 2016-10-12 | 2018-04-12 | Robert Bosch Gmbh | Method and control unit for balancing and diagnosing an exhaust gas recirculation mass flow meter |
| 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 |
| 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 |
Citations (4)
| 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 |
| 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 (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4406281C2 (en) * | 1993-03-01 | 1996-08-22 | Mitsubishi Motors Corp | Method for determining a failure of an exhaust gas recirculation device |
| DE10225285A1 (en) * | 2001-06-13 | 2002-12-19 | Luk Lamellen & Kupplungsbau | Method for torque transmission regulation for component group in drive train of motor vehicles with input and output quantities of components measured and correlation value calculated in correlation calculator |
| CN100398793C (en) * | 2003-04-16 | 2008-07-02 | 韦斯特波特动力股份有限公司 | Internal combustion engine with injection of gaseous fuel |
| JP4354283B2 (en) * | 2004-01-20 | 2009-10-28 | 本田技研工業株式会社 | Exhaust gas recirculation leak detector |
| 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 |
| ATE530791T1 (en) * | 2007-07-12 | 2011-11-15 | Schaeffler Technologies Gmbh | METHOD FOR DETERMINING THE TEST POINT OF AN AUTOMATED 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 (4)
| 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 |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102791995A (en) | 2012-11-21 |
| BR112012024042B1 (en) | 2020-09-29 |
| BR112012024042A2 (en) | 2016-08-30 |
| DE102010003203A1 (en) | 2011-09-29 |
| RU2560091C2 (en) | 2015-08-20 |
| WO2011117108A1 (en) | 2011-09-29 |
| RU2012145008A (en) | 2014-05-10 |
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