CN106050449A - Determination of nitrogen oxides in exhaust gas of internal combustion engine - Google Patents
Determination of nitrogen oxides in exhaust gas of internal combustion engine Download PDFInfo
- Publication number
- CN106050449A CN106050449A CN201610208534.2A CN201610208534A CN106050449A CN 106050449 A CN106050449 A CN 106050449A CN 201610208534 A CN201610208534 A CN 201610208534A CN 106050449 A CN106050449 A CN 106050449A
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- China
- Prior art keywords
- cylinder
- internal combustion
- combustion engine
- nitrogen oxides
- parameter
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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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
- F02D35/02—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions
- F02D35/025—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions by determining temperatures inside the cylinder, e.g. combustion temperatures
- F02D35/026—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions by determining temperatures inside the cylinder, e.g. combustion temperatures using an estimation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
- F02D35/02—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions
- F02D35/023—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions by determining the cylinder pressure
-
- 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
- F02D41/146—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 NOx content or concentration
- F02D41/1461—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 NOx content or concentration of the exhaust gases emitted by the engine
- F02D41/1462—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 NOx content or concentration of the exhaust gases emitted by the engine with determination means using an estimation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2250/00—Engine control related to specific problems or objectives
- F02D2250/36—Control for minimising NOx emissions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
- F02D35/02—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions
- F02D35/028—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions by determining the combustion timing or phasing
-
- 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
Landscapes
- 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)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
For the determination of nitrogen oxides in the exhaust gas tract (5) of an internal combustion engine (3), it is proposed to determine at least one variable which characterizes a combustion in at least one cylinder (2) of the internal combustion engine (3) and to take this into account when determining the nitrogen oxides. For this purpose, an internal cylinder pressure is preferably used, which is detected, for example, by means of a pressure sensor (12) assigned to the cylinder (2).
Description
Technical field
The method that the present invention relates to nitrogen oxides in a kind of waste gas for obtaining internal combustion engine.The invention still further relates to one
For controlling and/or regulating the controller of internal combustion engine and a kind of computer program.
Background technology
When running internal combustion engine, particularly in gasoline motor and diesel motor, when fuel combustion by being included in suction
Nitrogen (N in air2) create nitric oxide (NO) and nitrogen dioxide (NO2), they are collectively referred to as nitrogen oxides (NOx).For
Optimize operation and the exhaust gas properties of internal combustion engine, it is known that determine the nitrogen oxidation produced when burning by suitable model
Thing.The temperature of air of admission pressure, suction, the air capacity of suction, the fuel quantity of injection and suction is such as take into account at this
The oxygen content of air.
Summary of the invention
The technical problem to be solved is, improve in terms of degree of accuracy known to when being used for determining burning at internal combustion
The method of the nitrogen oxides produced in machine.Additionally, the determination of nitrogen oxides is about the variable in the service condition of internal combustion engine especially
About by the aging possible tolerance caused of parts and change all should be the most sane.
This technical problem thus solves by the method starting described type by the present invention, i.e. obtains at least one and characterizes
The parameter of the burning at least one cylinder of internal combustion engine and consider this parameter when obtaining nitrogen oxides.Because nitrogen aoxidizes
Thing produces, so the consideration to current burning has the advantage that, i.e. can particularly precisely determine generation when burning
Nitrogen oxides.The time trend of the parameter that characterize burning is preferably used at this.
In a particularly preferred embodiment, according to the intrinsic pressure parameter determining sign burning of cylinder.Cylinder is intrinsic pressure
Such as can obtain and give the change of the state about current or burning by the pressure transducer being arranged in cylinder
The explanation of process, this can provide again the explanation about the quality burnt and the nitrogen oxides therefore produced at this.
The parameter determination preferably burnt by sign rate of heat release and consider this rate of heat release when obtaining nitrogen oxides.
The rate of heat release advantageously intrinsic pressure parameter determination with sign crank shaft angle according to cylinder.It is considered for characterizing burning when cylinder is intrinsic pressure
Parameter time, this is especially advantageous.
According to one preferred embodiment, the temperature at least one cylinder is obtained and when obtaining nitrogen oxides
In view of this temperature.Thus can the most more precisely obtain nitrogen oxides.Temperature is the most additionally according to lambda (λ)
Value, the convolution degree started in point, cylinder of burning and/or rail pressure determine.These parameters are suitable for the most true
Determine the temperature in cylinder.
Advantageously additionally perform obtaining of nitrogen oxides according at least one in following parameters: admission pressure, enter
Air themperature in gas system, the air capacity of suction, the fuel quantity of injection, the running status of ERG, internal combustion engine
Rotating speed and/or the current load of internal combustion engine.These parameters can be to be suitable for considered the owning when obtaining nitrogen oxides
Parameter.
The most preferably adjust according to concrete measurement, wherein, some parameters of the method corresponding to
The measurement empirically performed of nitrogen oxides is adjusted.Therefore the precision of the method is carried during internal combustion engine operation again
High.
This technical problem also by the control device for internal combustion engine being programmed to carry out in the present inventive method and/
Or adjusting means solves.Additionally, this technical problem is also by the computer program being programmed to carry out in the present inventive method
Solve, wherein, the most particularly run on the controller of internal combustion engine at computer program in the present inventive method
Time be carried out.
Other the feature of the present invention, application feasible program and advantage are by next explaining by accompanying drawing the present invention
The explanation of the embodiment released draws, wherein, the present invention the most individually or can be in different combinations by feature
Important, and without again explicitly pointing out this point.
Accompanying drawing explanation
In accompanying drawing:
Fig. 1 diagrammatically illustrates the internal combustion engine with controller；And
Fig. 2 is block diagram, and the method schematically illustrating feasible embodiment in the present inventive method in the diagram walks
Rapid or process block.
Detailed description of the invention
Figure 1 illustrates controller 1 and include the internal combustion engine 3 of multiple cylinder 2.Internal combustion engine 3 and air inlet are 4 and exhaust system
5 connect.Air quality measuring instrument 6, temperature sensor 7 and pressure transducer 8 is arranged in air inlet system.Cloth in exhaust system 5
Put lambda sensor 9.Additionally arranging rotation angle sensor 9 for internal combustion engine 3, this rotation angle sensor for example, be mounted at
At bent axle or be arranged at camshaft.
Also show fuel conduit in FIG, it is such as configured to common rail 10, and fuel can be borrowed via this fuel conduit
Unshowned nozzle is helped to be introduced in cylinder 2.Pressure transducer 11 is arranged in common rail 10.
Arrange pressure transducer 12 for one of them in cylinder 2, cylinder can be measured by this pressure transducer intrinsic pressure.
Can certainly arrange some pressure transducers 12 in multiple cylinders 2, therefore the determination of nitrogen oxides is the most such as by list
The aging change aspect caused of individual parts can be improved again.
All sensors that figure 1 illustrates all are connected with controller 1 via some signal lines.In controller 1 from
If the signal of known sensor obtains dry values, carry out control and the regulation of operation to internal combustion engine 3 by these values.According to
The present invention, the value of some sensors is considered for obtaining the nitrogen oxides in the waste gas of internal combustion engine 3.
Figure 2 illustrates some method steps or process block, they indicate one in the present inventive method may
Embodiment, or implant in the present inventive method in them.
Block 101,102 and 103 comprises some by method step known to the existing method for determining nitrogen oxides.?
Block 101 detects current service condition, the most current rotating speed, the load in internal combustion engine or current temperature.At block 102
Middle detection measurement parameter or air inlet are the thermodynamic condition of 4.The temperature of this e.g. air of admission pressure or suction.In addition examine
Survey the parameter for example originating from air quality measuring instrument 6 or illustrate the parameter of sprayed fuel quantity.Block 103 determines entering
The oxygen content of the air in gas system 4.
Input data detected in block 101, the 102 and 103 input parameter acting on model 110, the most therefrom
Nitrogen oxides is determined in block 111 in known method.
According to the present invention, the cylinder pressure in detecting at least one cylinder in processing block 105.This is such as by layout
Pressure transducer 12 in cylinder 2 completes.It is then preferred that the most such as by the lambda being arranged in exhaust system 5
Sensor 9 determines lambda value.Additionally, determine the beginning of burning in cylinder 2, this such as completes with the form of crank shaft angle.?
Embodiment illustrated in fig. 2 additionally take into account the degree of the convolution of the admixture of gas in cylinder 2 and in-orbit in 10
Such as by the pressure of pressure transducer 11 detection.
In the embodiment shown in figure 2, in processing block 106, take into account other characteristic of internal combustion engine 3, such as gas
The quantity of cylinder, the structure of internal combustion engine and similar characteristics.Following equation is such as pressed by block 103,104 and 105 in block 107
The data obtained obtain ignition temperature:
Wherein,It is ignition temperature,It is that cylinder is intrinsic pressure,Being the oxygen content in air inlet system, LB is the waste gas of internal combustion engine
Lambda value, POC characterizes the center of burning, and SWL characterizes the degree of the convolution of the admixture of gas in cylinder, and pRail is at height
Fuel pressure in pressure memorizer or rail and f(...) represent the functional relationship of these parameters.
Ignition temperature can be extremely precisely determined according to above-mentioned parameter.
In block 108, determine rate of heat release, wherein, it is contemplated that the cylinder obtained in block 105 intrinsic pressure and other
The parameter obtained in block 106, such as bent axle or the current angle of camshaft and illustrate the heat occurred in the cylinder
Some coefficients of the conversion of mechanics.
Preferably calculate rate of heat release by following equation:
Wherein, HRR is the calculated share of heat release,WithBeing the factor, the described factor is characterized in the thermodynamics in cylinder
Process,WithThe cylinder that sign depends on crank shaft angle is intrinsic pressure, andWithCharacterize the interval of crank shaft angle.
The knot adjusted in the present inventive method for obtaining nitrogen oxides in the offgas is take into account in block 109
Really, the such as experimental test running by internal combustion engine of these results is obtained.
Parameter that is that detect in block 101,102 and 103 and that calculate in block 107,108 and 109 or that determine
All being fed to 110, storage has the model for calculating nitrogen oxides in 110, thus this model is comprising about pass
System's regulation or computational rules, determine the value of nitrogen oxides in block 111 by this relationship specifications or computational rules.
Intrinsic pressure by adding other input parameter particularly cylinder by the present invention, it is achieved that to the nitrogen oxides in waste gas
Determine the most accurately.Additionally, the most in various embodiments relative at internal combustion engine operation
Change in condition or the deviation of the preferable value with internal combustion engine existed under real world conditions and the most also about because of single
The aging deviation caused of parts is the most sane.Additionally, with the calibration having simplified and speeded up model in the present inventive method
Process, because intrinsic pressure based on cylinder the most in real time by the nitrogen oxides model part ground of the present invention.
Claims (11)
1. the method being used for obtaining the nitrogen oxides in the waste gas of internal combustion engine (3), it is characterised in that obtain at least one table
Levy the parameter of burning at least one cylinder (2) of internal combustion engine (3), and consider this ginseng in the obtaining of nitrogen oxides
Number.
2. the method as described in claim 1, it is characterised in that obtain the time trend of at least one parameter characterizing burning.
3. the method as described in claim 1, it is characterised in that at least one parameter characterizing burning is that cylinder is intrinsic pressure.
4. the method as described in aforementioned any one of claim, it is characterised in that the parameter according to characterizing burning is obtained at least
Rate of heat release in one cylinder (2) and consider this rate of heat release in the obtaining of nitrogen oxides.
5. the method as described in claim 4, it is characterised in that intrinsic pressure according to cylinder and sign crank shaft angle parameter determination heat is released
Put rate.
6. the method as described in aforementioned any one of claim, it is characterised in that obtain temperature at least one cylinder with
And consider this temperature in the obtaining of nitrogen oxides.
7. the method as described in claim 6, it is characterised in that the temperature at least one cylinder (2) is intrinsic pressure according to cylinder,
Convolution degree and rail pressure in lambda value, the startup point of burning, cylinder (2) are determined.
8. the method as described in aforementioned any one of claim, it is characterised in that obtaining additionally according to following of nitrogen oxides
At least one in parameter is obtained: admission pressure, air themperature in air inlet system, the air capacity of suction, the fuel that sprays into
Amount, the running status of ERG, the rotating speed of internal combustion engine (3), the current load of internal combustion engine (3).
9. the method as described in aforementioned any one of claim, it is characterised in that perform according to the concrete measurement of nitrogen oxides
The method is adjusted.
10. the control device for internal combustion engine (3) and/or adjusting means (1), it is characterised in that control device and/or tune
Regulating device (1) is implemented for performing the method as described in any one of claim 1 to 9.
11. 1 kinds of computer programs, it is characterised in that this computer program is so programmed so that when this computer program exists
On calculating device particularly be used for controlling and/or regulate be carried out on the controller (1) of the operation of internal combustion engine (3) time, implement
Method as described in any one of claim 1 to 9.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102015206135.3A DE102015206135A1 (en) | 2015-04-07 | 2015-04-07 | Determining nitrogen oxides in the exhaust gas of an internal combustion engine |
| DE102015206135.3 | 2015-04-07 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106050449A true CN106050449A (en) | 2016-10-26 |
| CN106050449B CN106050449B (en) | 2021-11-30 |
Family
ID=56986118
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610208534.2A Active CN106050449B (en) | 2015-04-07 | 2016-04-06 | Determination of nitrogen oxides in exhaust gas of internal combustion engine |
Country Status (4)
| Country | Link |
|---|---|
| CN (1) | CN106050449B (en) |
| DE (1) | DE102015206135A1 (en) |
| FR (1) | FR3034812B1 (en) |
| IT (1) | ITUA20162291A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114876657A (en) * | 2022-05-09 | 2022-08-09 | 潍柴动力股份有限公司 | Method and device for controlling nitrogen oxide emission of engine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020112469A1 (en) * | 2000-12-25 | 2002-08-22 | Mitsubishi Denki Kabushiki Kaisha | Device for controlling an internal combustion engine |
| US20030191575A1 (en) * | 2002-04-08 | 2003-10-09 | Wright John F. | System for estimating NOx content of exhaust gas produced by an internal combustion engine |
| US20030216855A1 (en) * | 2002-05-15 | 2003-11-20 | Liang Cho Y. | NOx emission-control system using a virtual sensor |
| US20040144082A1 (en) * | 2003-01-29 | 2004-07-29 | Visteon Global Technologies, Inc. | Controller for controlling oxides of nitrogen (NOx) emissions from a combustion engine |
| US20080010973A1 (en) * | 2004-11-26 | 2008-01-17 | Peugeot Citroen Automobiles Sa | Device and Method for Determination of the Quantity of Nox Emitted by a Diesel Engine in a Motor Vehicle and Diagnostic and Engine Management System Comprising Such a Device |
| US20080149081A1 (en) * | 2006-12-22 | 2008-06-26 | Detroit Diesel Corporation | Real-time, table-based estimation of diesel engine emissions |
| CN101641511A (en) * | 2007-03-05 | 2010-02-03 | 丰田自动车株式会社 | Internal combustion engine controller |
| CN102016267A (en) * | 2008-04-23 | 2011-04-13 | 洋马株式会社 | Gas engine |
| CN103032140A (en) * | 2011-09-30 | 2013-04-10 | 沃尔沃汽车公司 | NOx emission estimation method and arrangement |
| CN103133104A (en) * | 2011-11-22 | 2013-06-05 | 现代自动车株式会社 | Method of predicting NOx generation amount |
| WO2013130744A1 (en) * | 2012-02-28 | 2013-09-06 | Wayne State University | Using ion current signal for engine performance and emissions measuring techniques and methods for doing the same |
-
2015
- 2015-04-07 DE DE102015206135.3A patent/DE102015206135A1/en active Pending
-
2016
- 2016-04-05 IT ITUA2016A002291A patent/ITUA20162291A1/en unknown
- 2016-04-06 CN CN201610208534.2A patent/CN106050449B/en active Active
- 2016-04-06 FR FR1653026A patent/FR3034812B1/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020112469A1 (en) * | 2000-12-25 | 2002-08-22 | Mitsubishi Denki Kabushiki Kaisha | Device for controlling an internal combustion engine |
| US20030191575A1 (en) * | 2002-04-08 | 2003-10-09 | Wright John F. | System for estimating NOx content of exhaust gas produced by an internal combustion engine |
| US20030216855A1 (en) * | 2002-05-15 | 2003-11-20 | Liang Cho Y. | NOx emission-control system using a virtual sensor |
| US20040144082A1 (en) * | 2003-01-29 | 2004-07-29 | Visteon Global Technologies, Inc. | Controller for controlling oxides of nitrogen (NOx) emissions from a combustion engine |
| US20080010973A1 (en) * | 2004-11-26 | 2008-01-17 | Peugeot Citroen Automobiles Sa | Device and Method for Determination of the Quantity of Nox Emitted by a Diesel Engine in a Motor Vehicle and Diagnostic and Engine Management System Comprising Such a Device |
| US20080149081A1 (en) * | 2006-12-22 | 2008-06-26 | Detroit Diesel Corporation | Real-time, table-based estimation of diesel engine emissions |
| CN101641511A (en) * | 2007-03-05 | 2010-02-03 | 丰田自动车株式会社 | Internal combustion engine controller |
| CN102016267A (en) * | 2008-04-23 | 2011-04-13 | 洋马株式会社 | Gas engine |
| CN103032140A (en) * | 2011-09-30 | 2013-04-10 | 沃尔沃汽车公司 | NOx emission estimation method and arrangement |
| CN103133104A (en) * | 2011-11-22 | 2013-06-05 | 现代自动车株式会社 | Method of predicting NOx generation amount |
| WO2013130744A1 (en) * | 2012-02-28 | 2013-09-06 | Wayne State University | Using ion current signal for engine performance and emissions measuring techniques and methods for doing the same |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114876657A (en) * | 2022-05-09 | 2022-08-09 | 潍柴动力股份有限公司 | Method and device for controlling nitrogen oxide emission of engine |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102015206135A1 (en) | 2016-10-13 |
| CN106050449B (en) | 2021-11-30 |
| FR3034812A1 (en) | 2016-10-14 |
| FR3034812B1 (en) | 2021-04-23 |
| ITUA20162291A1 (en) | 2017-10-05 |
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