CN105986914B - Method for operating a lambda controller of an internal combustion engine, device for carrying out the method, controller program and controller program product - Google Patents
Method for operating a lambda controller of an internal combustion engine, device for carrying out the method, controller program and controller program product Download PDFInfo
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- CN105986914B CN105986914B CN201610155300.6A CN201610155300A CN105986914B CN 105986914 B CN105986914 B CN 105986914B CN 201610155300 A CN201610155300 A CN 201610155300A CN 105986914 B CN105986914 B CN 105986914B
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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
- F02D41/02—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
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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
- F02D41/02—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
- F02D41/1477—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the regulation circuit or part of it,(e.g. comparator, PI regulator, output)
- F02D41/1483—Proportional component
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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
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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
- F01N11/007—Monitoring or diagnostic devices for exhaust-gas treatment apparatus the diagnostic devices measuring oxygen or air concentration downstream of the exhaust apparatus
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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
- F02D41/02—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
- F02D41/1439—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the position of the sensor
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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
- F02D41/02—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
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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
- F02D41/02—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
- F02D41/1473—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the regulation method
- F02D41/1475—Regulating the air fuel ratio at a value other than stoichiometry
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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
- F02D41/02—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
- F02D41/1477—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the regulation circuit or part of it,(e.g. comparator, PI regulator, output)
- F02D41/1482—Integrator, i.e. variable slope
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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
- F01N2550/00—Monitoring or diagnosing the deterioration of exhaust systems
- F01N2550/02—Catalytic activity of catalytic converters
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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
- F02D41/02—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
- F02D2041/1409—Introducing closed-loop corrections characterised by the control or regulation method using at least a proportional, integral or derivative controller
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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
- F02D41/02—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
- F02D2041/1413—Controller structures or design
- F02D2041/1422—Variable gain or coefficients
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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
- F02D41/02—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
- F02D41/1439—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the position of the sensor
- F02D41/1441—Plural sensors
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- 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)
- Chemical Kinetics & Catalysis (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
A method for operating a lambda controller (12) of an internal combustion engine (10) in the exhaust gas duct of which at least one lambda sensor and a catalytic converter are arranged, wherein a control oscillation occurs during a control operation of the lambda controller (12), and a device for carrying out the method are proposed. An embodiment according to the invention is characterized in that a magnitude (42) of the amplitude for the control oscillation is determined and compared with a threshold value (46) and then at least one characteristic variable (14, 16, 18) of the lambda controller (12) is changed when the threshold value (46) is exceeded.
Description
Technical Field
The invention is based on a method for operating a lambda controller of an internal combustion engine, in the exhaust gas duct of which at least one lambda sensor and a catalytic converter are arranged, and on a device for carrying out a method of the generic type according to the independent patent claims.
A controller program and a controller program product are also subject matter of the present invention.
Background
DE 102011082641 a1 describes a lambda controller of an internal combustion engine, which is implemented as a PID controller, wherein individual controller parameters, P part, I part, D part or a combination of these controller parameters can be varied. The control path sections are differentiated according to the change of the at least one control characteristic.
A catalyst diagnosis is described in the publication DE 102005062116 a1, which is based on an evaluation of the oxygen storage capacity of the catalyst.
The object of the present invention is to specify a method for operating a lambda controller of an internal combustion engine and to specify a device for carrying out the method, which also make possible a stable control operation when the catalytic converter becomes less normal.
Disclosure of Invention
The invention relates to a lambda (lambda) controller for operating an internal combustion engine, comprising: during the control operation of the lambda controller, at least one lambda sensor and a catalytic converter are arranged in the exhaust gas duct of the internal combustion engine, wherein control oscillations can occur. According to the invention, the amplitude values for these control oscillations are determined and compared with a threshold value, and then at least one characteristic variable of the lambda controller is changed when the threshold value is exceeded.
Strong control oscillations can occur in particular when the catalyst ages and the oxygen storage capacity decreases. The adaptation of the lambda controller to the aging state of the catalytic converter is thereby achieved according to the embodiment of the invention.
The interference of at least one characteristic variable of the lambda controller is carried out in such a way that the control oscillations are at least reduced or completely eliminated. The required interference with at least one characteristic variable of the lambda controller is preferably determined empirically in the context of the use case.
The embodiment according to the invention reduces the exhaust emissions in that an aged catalyst with a poor oxygen storage capacity can also be maintained in relation to a new state in the optimum conversion window.
A catalyst diagnosis can be carried out when the oscillations are reduced or when the oscillations completely disappear, which enables a more specific elucidation of the cause of the occurring high control oscillations by evaluating the catalyst.
Advantageous developments and embodiments of the implementation according to the invention are the subject matter of the dependent method claims.
In an advantageous first embodiment, provision is made for the P part and/or the I part and/or the D part of the lambda controller, which is designed as a PID controller, to be changed as a characteristic variable after the threshold value has been exceeded. The required intervention of at least one characteristic variable of the lambda controller is preferably determined empirically as a function of the application. What can generally be obtained is: in order to reduce the control oscillations, a reduction of the P and/or D part of the PID controller contained in the lambda controller and, if necessary, an increase of the I part must be carried out.
In a further embodiment, it is provided that the control oscillation is derived from a lambda measurement signal of a lambda sensor arranged downstream after the catalytic converter. The oscillation of the lambda measurement downstream of the catalytic converter indicates a comparatively large control oscillation, so that the value for the amplitude of the control oscillation is determined from the lambda measurement of the lambda sensor downstream of the catalytic converter, which makes it possible to detect high control oscillations with high safety.
An advantageous embodiment relates to the determination of the value for adjusting the amplitude of the oscillation. The control oscillation is preferably differentiated first and then the value is formed. Integration is then set, wherein the integration result is compared with a threshold value.
A variant of this embodiment provides that the integration is controlled by a start-stop signal which is obtained in such a way that: the value of the lambda measurement detected downstream, for example, downstream of the catalytic converter is determined, then the value of the control oscillation is averaged as a function of the integral, this average value is compared with an integral period threshold value, and then the integral of the differentiated value of the lambda measurement is ended when this average value exceeds the integral period threshold value, this integral being used as the value for the control oscillation. In this way, a targeted integration period is obtained which is suitable for adjusting the value of the oscillation.
Alternatively, it is provided that integration for a predetermined integration period is carried out.
The control oscillation is preferably only detected when at least approximately fixed operating states of the internal combustion engine are present, so that transient processes in the control process do not influence the evaluation of the control oscillation.
When the value for regulating the amplitude of the oscillation exceeds a predetermined threshold value, a catalyst diagnosis can additionally be started. If necessary, at least one characteristic variable of the lambda controller is first changed in order to reduce oscillations and a catalyst diagnosis is not carried out until after small control oscillations.
The device according to the invention for carrying out the method relates firstly to a specially arranged controller. The controller contains means for performing the method.
The controller preferably comprises at least one electrical memory, in which a plurality of method steps are stored as a controller program.
The controller program according to the invention provides that all steps of the method according to the invention are carried out when the controller program is run in the controller.
The controller program product according to the invention with the program code stored on a machine-readable carrier implements the method according to the invention when the program runs in the controller.
Embodiments of the invention are illustrated in the accompanying drawings and are explained in detail in the following description.
Drawings
Fig. 1 shows a part of a block diagram of a controller which is specifically arranged for carrying out the method according to the invention.
Detailed Description
Fig. 1 shows a controller 10 that includes a lambda regulator 12. According to the exemplary embodiment shown, the lambda controller is to be realized as a PID lambda controller, which thus has a P part 14, an I part 16 and a D part 18. These components are denoted below as characteristic variables of the lambda controller 12.
The lambda setpoint value 20, the first lambda measurement value 22 and the second lambda measurement value 24 are used as input variables for the lambda controller 12. The first lambda measurement 22 is detected upstream of the catalytic converter, while the second lambda measurement 24 is detected downstream of the catalytic converter by a lambda sensor. The lambda controller 12 provides a fuel signal 26 as a control variable, which determines the fuel supply of the internal combustion engine in the exhaust gas region of which a catalytic converter and several lambda sensors are arranged.
During lambda control operation, transient oscillations (Einschwingen) processes and also control oscillations occur when the operating conditions of the internal combustion engine are changed. At least one characteristic variable 14, 16, 18 of the lambda controller 12 is adapted to the nature of the catalytic converter used in the context of the use case. The oxygen storage capacity of the catalytic converter has a significant influence on the time behavior of the lambda controller 12. As the catalyst ages, the oxygen storage capacity of the catalyst may decrease, and thus the occurrence of oscillations in the lambda regulator 12 may increase. An increase in the oscillations, in particular an increase in the amplitude of the oscillations, can lead to a deterioration of the conversion properties of the catalyst by: the residual oxygen partial pressure in the exhaust gas results in the optimum conversion window being rejected due to the large oscillations of the lambda controller 12 about the predetermined lambda setpoint value 20.
In this way, the invention provides that a value for adjusting the amplitude of the oscillation is determined and compared with a threshold value. When the threshold value is exceeded, at least one characteristic parameter 14, 16, 18 of the lambda controller 12 is then changed. This change is made in the following manner: i.e. the amplitude of the oscillation is at least diminished or the oscillation disappears completely.
In order to detect at least one value for adjusting the amplitude of the oscillation, the time variation of the internal control variable of the lambda controller 12 or in particular the control variable can be taken into account.
In the exemplary embodiment shown, the value for adjusting the amplitude of the oscillations is obtained from a second lambda signal 24, which reflects the lambda value measured downstream after the catalytic converter. Due to the damping effect of the catalytic converter on the oscillations of the exhaust lambda, no oscillations usually occur in the second lambda signal 24 for a lambda regulation which is operated in an orderly manner. Nevertheless, the oscillations that occur indicate an inadmissibly high oscillation of the lambda controller 12.
According to an advantageous embodiment, the second lambda signal 24 is differentiated in the differentiator 30 and the value of the differentiated second lambda signal 32 is subsequently determined in the first value former 34.
It is possible to evaluate the value 36 of the differentiated second lambda signal 32 purely theoretically. But preferably the integral of the value 36 is set so as to obtain an average value over a certain period of time.
The integration of the value 36 taking place in the first integrator 38 can be controlled by a first start-stop signal 40, which is determined over a certain integration period, wherein the integration periods each start again at periodic intervals.
The integrated value 42 is compared in a first comparator 44 with a threshold value 46. Then, when the integrated value 42 exceeds the threshold value 46, at least one characteristic variable 14, 16, 18 of the lambda controller 12 is changed. The first comparator 44 is also connected to the P part 14, the I part 16 and the D part 18 of the lambda controller. The interference with the at least one parameter 14, 16, 18 is performed by: i.e. can counteract an inadmissibly high control oscillation or even disappear completely. The necessary direction of change and the value of the change or the phase of the change are preferably determined empirically in the context of the use case. Due to the change in at least one characteristic variable 14, 16, 18 and the reduction of the oscillation of the lambda controller 12 connected thereto, the catalytic converter can again be operated in the optimum conversion window. The implementation according to the invention makes it possible in particular to adapt the influence of the aging of the catalytic converter (in conjunction with a reduction in the oxygen storage capacity which directly has an effect on the amplification factor of the control loop).
A variant of the implementation according to the invention that is preferably provided provides that, instead of the first start-stop signal 40, a second start-stop signal 48 is provided, which determines the integration period of the integrator 38.
According to one embodiment, second start-stop signal 48 is also obtained from second lambda measurement 24. The second lambda measurement 24 is also used by a second value former 50. The value 52 of the second lambda measurement 24 is integrated in a second integrator 54, a sliding integral being provided which yields an average value 56, which is compared in a second comparator 58 with an integration period threshold 60. As soon as the mean value 56 exceeds the integration period threshold 60, the integration is terminated in the first integrator 38 by the second start-stop signal 48 and is then resumed again. The advantage of this embodiment of the variant is that the integration period in the first integrator 38 is adapted to the amplitude of the control oscillation.
One embodiment provides that when the integrated value 42 exceeds the threshold value 46, a diagnosis of the catalytic converter is then triggered by means of the diagnosis start signal 62. It is preferably provided that the damping of oscillations is first attempted by interfering with at least one parameter 14, 16, 18 of the lambda controller 12 and that a first subsequent diagnosis of the catalytic converter is carried out. An alternative embodiment provides that when the integrated value 42 exceeds the threshold value 46, a fault signal 64 which can be registered in a fault memory or can be displayed is then immediately provided.
According to one embodiment, it is provided that the method according to the invention is carried out in a fixed operating state of the internal combustion engine, so that the determination of the value for the amplitude of the control oscillation is not influenced by normal control operation.
Claims (9)
1. A method for operating a lambda controller (12) of an internal combustion engine (10), in the exhaust gas duct of which at least one lambda sensor and a catalytic converter are arranged, in which a plurality of control oscillations occur during a control operation of the lambda controller (12), characterized in that a value (42) for the amplitude of the control oscillations is determined and compared with a threshold value (46) and then at least one characteristic variable (14, 16, 18) of the lambda controller (12) is changed when the threshold value (46) is exceeded.
2. Method according to claim 1, characterized in that after the threshold value (46) is exceeded, the P part (14) and/or the I part (16) and/or the D part (18) of the lambda controller (12) implemented as a PID controller are changed as characteristic variables (14, 16, 18).
3. Method according to claim 1, characterized in that the control oscillation is derived from a lambda measurement (24) which is provided by a lambda sensor arranged downstream after the catalytic converter.
4. Method according to claim 1, characterized in that the regulating oscillation is differentiated, a value (36) is formed, integration is then set and the value (42) for the amplitude of the regulating oscillation is compared as integration result with the threshold value (46).
5. Method according to claim 4, characterized in that after the start of the integration, a value (52) of the regulating oscillation is determined, a value (56) of the regulating oscillation is averaged, the average value of the values (56) is compared with an integration period threshold value (60), and the integration is then ended when the average value of the values (56) exceeds the integration period threshold value (60).
6. The method according to claim 1, characterized in that the control oscillation is detected and evaluated only when a fixed operating state of the internal combustion engine is present.
7. Method according to claim 1, characterized in that when the threshold value (46) is exceeded, a catalyst diagnosis is then carried out or the catalyst is directly evaluated as defective.
8. An arrangement for operating a lambda controller (12) of an internal combustion engine, characterized in that at least one controller (10) is provided which is arranged in particular for carrying out the method according to one of claims 1 to 7.
9. A controller program product with program code stored on a machine-readable carrier for performing the method according to any of claims 1 to 7 when the program is implemented in a controller (10).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102015205049.1A DE102015205049A1 (en) | 2015-03-20 | 2015-03-20 | Method for operating a lambda controller of an internal combustion engine, device for carrying out the method, control unit program and control unit program product |
| DE102015205049.1 | 2015-03-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105986914A CN105986914A (en) | 2016-10-05 |
| CN105986914B true CN105986914B (en) | 2021-04-13 |
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| CN201610155300.6A Active CN105986914B (en) | 2015-03-20 | 2016-03-18 | Method for operating a lambda controller of an internal combustion engine, device for carrying out the method, controller program and controller program product |
Country Status (2)
| Country | Link |
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| CN (1) | CN105986914B (en) |
| DE (1) | DE102015205049A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102023204105A1 (en) * | 2023-05-04 | 2024-11-07 | Robert Bosch Gesellschaft mit beschränkter Haftung | Method for operating an exhaust gas sensor, for example a broadband lambda sensor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007065852A1 (en) * | 2005-12-05 | 2007-06-14 | Robert Bosch Gmbh | Method for the diagnosis of a catalytic converter which is arranged in an exhaust area of an internal combustion engine and device for carrying out said method |
| CN102472186A (en) * | 2009-08-10 | 2012-05-23 | 罗伯特·博世有限公司 | Method and device for dynamically diagnosing an exhaust gas probe |
| CN103782015A (en) * | 2011-09-14 | 2014-05-07 | 罗伯特·博世有限公司 | Method and device for control path modification |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005062116A1 (en) | 2005-12-23 | 2007-06-28 | Robert Bosch Gmbh | Catalytic converter diagnosing method for internal combustion engine, involves changing lambda controller from rapid adaptation to long-term adaptation when catalytic converter diagnosis is completed |
| DE102008001569B4 (en) * | 2008-04-04 | 2021-03-18 | Robert Bosch Gmbh | Method and device for adapting a dynamic model of an exhaust gas probe |
-
2015
- 2015-03-20 DE DE102015205049.1A patent/DE102015205049A1/en active Pending
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- 2016-03-18 CN CN201610155300.6A patent/CN105986914B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007065852A1 (en) * | 2005-12-05 | 2007-06-14 | Robert Bosch Gmbh | Method for the diagnosis of a catalytic converter which is arranged in an exhaust area of an internal combustion engine and device for carrying out said method |
| CN102472186A (en) * | 2009-08-10 | 2012-05-23 | 罗伯特·博世有限公司 | Method and device for dynamically diagnosing an exhaust gas probe |
| CN103782015A (en) * | 2011-09-14 | 2014-05-07 | 罗伯特·博世有限公司 | Method and device for control path modification |
Also Published As
| Publication number | Publication date |
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| DE102015205049A1 (en) | 2016-09-22 |
| CN105986914A (en) | 2016-10-05 |
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