EP3221573A1 - Steuergerät für einen verbrennungsmotor - Google Patents
Steuergerät für einen verbrennungsmotorInfo
- Publication number
- EP3221573A1 EP3221573A1 EP15795168.2A EP15795168A EP3221573A1 EP 3221573 A1 EP3221573 A1 EP 3221573A1 EP 15795168 A EP15795168 A EP 15795168A EP 3221573 A1 EP3221573 A1 EP 3221573A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- combustion engine
- internal combustion
- emission
- emissions
- control device
- Prior art date
- 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.)
- Granted
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 30
- 239000004071 soot Substances 0.000 claims description 26
- 230000001186 cumulative effect Effects 0.000 claims description 10
- 239000000446 fuel Substances 0.000 claims description 9
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 4
- 206010021703 Indifference Diseases 0.000 abstract description 8
- 230000001955 cumulated effect Effects 0.000 abstract description 7
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 82
- 239000007789 gas Substances 0.000 description 24
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 8
- 229910002091 carbon monoxide Inorganic materials 0.000 description 8
- 229930195733 hydrocarbon Natural products 0.000 description 5
- 150000002430 hydrocarbons Chemical class 0.000 description 5
- 239000003054 catalyst Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000005457 optimization Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 239000008186 active pharmaceutical agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000010365 information processing Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—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
- F02D41/1406—Introducing closed-loop corrections characterised by the control or regulation method with use of a optimisation method, e.g. iteration
-
- 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
- F02D2250/00—Engine control related to specific problems or objectives
- F02D2250/38—Control for minimising smoke emissions, e.g. by applying smoke limitations on the fuel injection amount
Definitions
- the present invention relates to a control device for an internal combustion engine for determining at least one reference variable for an internal combustion engine.
- Control units are used to control important engine functions in the vehicle area.
- control unit receives information about an operating state of the engine (for example, speed, torque, desired torque, temperature, DPF (Diesel Particulate Filter)) load and determine reference variables that influence the consumption and emissions during operation.
- an operating state of the engine for example, speed, torque, desired torque, temperature, DPF (Diesel Particulate Filter)
- control unit engine maps in which, for example, a desired exhaust gas recirculation rate or a target boost pressure in dependence on the above-mentioned operating condition are stored.
- Suitable reference variables are for example exhaust gas recirculation rate
- Command values are then derived manipulated variables (for example, throttle position, position of a VTG (Variable Turbine Geometry)).
- Combustion engine system with all its units, auxiliary units and control elements.
- This strategy can be used to ensure that emission limits are not exceeded in defined speed profiles through optimized allocation of certain reference variables.
- An example of such velocity profiles are normalized Driving cycles, such as the NEDC (New European Driving Cycle), which are used to determine exhaust gas and / or fuel consumption.
- NEDC New European Driving Cycle
- For such cycles for example, global optimization approaches are known, as indicated in Heiko Sequence: Emission Modeling and Model-Based Optimization of the Engine Control, D17 Darmstadt Dissertations 2012.
- Diesel engine in the case of soot (particulate) emissions and nitrogen oxide emissions situations may occur in which, for example, in a speed profile the permissible nitrogen oxide emissions are exceeded and the permissible soot emissions are significantly undercut.
- Exhaust gas recirculation rate EGR rate
- AG R-division high pressure / low pressure
- filling rail pressure
- exhaust aftertreatment systems such as diesel particulate filter and SCR (Selective Catalytic Reduction) in terms of fuel and AdBlue consumption and emissions to optimize.
- An inventive control unit of an internal combustion engine taking into account operating state information, emission upper limits and a cumulative actual emission quantity, determines a reference variable (for example EGR rate, EGR distribution, charge) which is output to the internal combustion engine.
- a reference variable for example EGR rate, EGR distribution, charge
- the operating state information includes, for example, the rotational speed, the current one
- the cumulated actual emission size includes the sum of all in a given one
- At least one operating state of the internal combustion engine is adjusted by way of this reference variable (s) in such a way that a plurality of actual emission quantities are subject to upper emission limits in a specific operating period with a combination of any different operating states of the internal combustion engine set in a random order for this operating period (mg / km) and a target function is reduced as much as possible.
- this reference variable (s) is adjusted by way of this reference variable (s) in such a way that a plurality of actual emission quantities are subject to upper emission limits in a specific operating period with a combination of any different operating states of the internal combustion engine set in a random order for this operating period (mg / km) and a target function is reduced as much as possible.
- Exhaust aftertreatment systems such as particulate filters, AdBlue consumption, NOx emissions etc. or a combination of such variables).
- Such a control concept has the advantage that, for example, an uncritical actual emission quantity is increased to such an extent by a change in the reference variable that a critical actual emission quantity is reduced to such an extent that it is ensured that the
- one or more reference variable (s) are replaced by a
- Indifferenzkurve from Pareto-optimal alternatives selected from, for example, injection quantity, actual emissions and / or AdBlue dosage. This happens after a heuristic, which the
- the reference variable is determined or adapted dynamically and situation-dependent.
- the operating state information comprises at least one rotational speed (n) and a nominal torque (M).
- the actual emission quantities include at least two of the following quantities.
- the quantities include NOx output, HC output, CO output, CO 2 output, combined HC and NO x emission, soot particle count, soot particle mass, state of a diesel particulate filter, state of a NO x storage catalyst.
- the command variable includes at least one of the following variables that affect emissions behavior, namely, EGR rate, EGR split, fill, spark timing.
- the manipulated variables derived from this include one of the following variables, via which the desired reference variable can be effected in modern engines, namely throttle valve position; Adjustment of the variable turbine geometry, injection timing, camshaft adjustment.
- two actual emission quantities are considered, in particular the nitrogen oxide output and the soot output, which are competitively related in diesel engines.
- an internal combustion engine With the aid of an internal combustion engine with a control unit according to the invention, improved consumption values and emission values can be realized.
- Such an internal combustion engine is particularly suitable for vehicles.
- Fig. 1 shows schematically an engine system with a control device according to the invention
- Fig. 2 is a schematic representation of input and output variables
- Fig. 3 is a graph showing soot and NOx emissions versus EGR rate; 4 shows Pareto-optimal operating points for which a certain soot emission and a certain NOx emission apply;
- FIG. 6 shows a selection for a lower cumulative NOx emission shown
- FIG. 7 shows a selection for excessive accumulated NOx emission shown
- Fig. 8 shows the selection shown in Fig. 5 based on the relationship of C02 and
- a motor scheme is shown, which is controlled or controlled by an inventive control unit 1.
- Shown is as a reciprocating engine 2 (diesel or gasoline engine), trained internal combustion engine, which is filled via valves 3 and a charge air line 4 and is emptied via an exhaust line 5.
- the supply air passes through an air filter 6 and an exhaust gas turbocharger 7 with adjustable turbine geometry through an intercooler 8 via an inlet valve 3 into the cylinder, where optionally via an injection system fuel is supplied.
- the resulting exhaust gas is discharged through an exhaust valve 3 via the exhaust line.
- the compressed exhaust gas passes through the exhaust gas turbocharger 7, drives it and thus compresses the charge air. Subsequently, it passes through a nitrogen storage catalyst 10 and a diesel particulate filter 1 1 and finally passes through an exhaust valve 12 into the exhaust 13th
- the valves 3 are driven by an adjustable camshaft 14. The adjustment takes place via a camshaft adjusting device 15, which can be activated by the control unit 1.
- a portion of the exhaust gas can be introduced via a high-pressure exhaust gas recirculation valve 16 into the charge air line 4.
- An exhaust-treated partial flow can, in the low-pressure region downstream of the exhaust gas turbocharger 7, be exhausted via a corresponding exhaust gas cooling 17 and an exhaust gas recirculation system.
- Low pressure valve 18 are guided in the charge air line 4.
- the turbine geometry of the exhaust gas turbocharger 7 is adjustable via an adjusting device 19.
- the charge air supply (“gas”) is controlled via the main throttle valve 20.
- Actuating device 19 the main throttle valve 20, the exhaust gas recirculation high-pressure valve 16, the camshaft adjusting device 15 and the exhaust valve 12 can be controlled (solid lines).
- control unit 1 via sensors and setpoint generator, for example with
- Temperature information (intercooler 8, exhaust gas cooling 17) and with actual emission values (for example, from a sensor or physical / empirical model) supplied.
- further operating state information can come as: accelerator pedal position, throttle position, air mass, battery voltage, engine temperature, crankshaft speed and top dead center, gear stage, vehicle speed.
- the following exemplary embodiments relate to the control and regulation of emission values as a function of predetermined emission upper limits and cumulated actual values.
- control unit 1 determines one or more required and effective for influencing the emissions and effective reference variables x (t).
- Influencing emissions for example, NOx, HC, CO, soot
- Em DS for example mass per time [mg / s]
- Cumulated actual values Em K of emissions are derived from these emissions (integration of emission rates over time). From these cumulated actual values Em K are in the control unit 1 together with the elapsed operating time t or the distance traveled s, known or predetermined upper emission limits Em G and information about the driver's request FW (eg
- FIG. 3 shows, by way of example, the relationship between NOx emissions and soot emissions as a function of the exhaust gas recirculation rate (EGR), which forms a reference variable x (t) here.
- EGR exhaust gas recirculation rate
- FIG. 4 shows a graph of command variable combinations of certain soot emissions plotted against certain NOx emissions.
- the emission history accumulated actual values Em G for past (possibly arbitrary, in random order set, different operating conditions) are taken into account.
- Pareto-optimal target size combinations in which the soot emission can only be further reduced if the NOx emission is increased, are marked by the points x. All pareto-optimal target size combinations form the so-called pareto front, which connects the points x together. In a minimization problem, points to the left below the Pareto front (shaded area) are unrealizable and all right above target size combinations are not Pareto optimal, since there are combinations (points x) for both soot emission and NOx emission cheaper on the Pareto front can be realized.
- the emission upper limit Em G is a NOx limit value NOx-G (dashed line) and the figure below Column shows in the shaded area as accumulated actual value Em K the previous accumulated NOx emissions NOx-Ki. Since the cumulative NOx emissions NOx-Ki are already relatively close to the NOx limit NOx-G, here is a relatively high
- Fig. 6 shows an example in which the cumulative NOx emissions (NOX-K2) are further below the NOX limit NOx-G.
- NOX-K2 the cumulative NOx emissions
- the exchange ratio of the indifference curve I is smaller (the straight line is flatter).
- a higher NOx emission can be accepted without the risk that the NOx limit value NOx-G is exceeded.
- the soot emission can be kept lower.
- the flattening straight line is shifted to the next target size combination at which a specific NOx emission and a corresponding soot emission with an associated reference variable x (t) (here the corresponding EGR from FIG. 3) can be realized.
- Fig. 7 shows an example in which the cumulative NOx emissions (NOX-K3) have exceeded the NOx limit NOx-G.
- NOX-K3 the cumulative NOx emissions
- NOx-G the NOx limit
- FIG. 8 shows, analogously to FIG. 5, an example in which CO2 is to be minimized as a function of the cumulative NOx emissions.
- FIG. 9 shows, analogously to FIG. 5, an example in which the indifference curve does not extend linearly.
- the emission values can be improved during operation and depending on changing boundary conditions.
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)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Exhaust Gas After Treatment (AREA)
- Exhaust-Gas Circulating Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014116748 | 2014-11-17 | ||
PCT/EP2015/076845 WO2016079132A1 (de) | 2014-11-17 | 2015-11-17 | Steuergerät für einen verbrennungsmotor |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3221573A1 true EP3221573A1 (de) | 2017-09-27 |
EP3221573B1 EP3221573B1 (de) | 2020-04-22 |
Family
ID=54548175
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15795168.2A Active EP3221573B1 (de) | 2014-11-17 | 2015-11-17 | Steuergerät für einen verbrennungsmotor |
Country Status (6)
Country | Link |
---|---|
US (1) | US10690075B2 (de) |
EP (1) | EP3221573B1 (de) |
KR (1) | KR101836787B1 (de) |
CN (1) | CN107002576B (de) |
DE (1) | DE102015222684B4 (de) |
WO (1) | WO2016079132A1 (de) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102016208236A1 (de) * | 2016-05-12 | 2017-11-30 | Volkswagen Ag | Steuerungsverfahren für einen Verbrennungsmotor, Steuergerät und Verbrennungsmotor |
DE102016208834A1 (de) | 2016-05-23 | 2017-11-23 | Technische Universität Dresden | Verfahren zum Betreiben eines in einem Fahrzeug installierten Verbrennungskraftmaschine |
DE102017215251B4 (de) * | 2017-08-31 | 2019-04-18 | Volkswagen Aktiengesellschaft | Verfahren und Steuergerät zur Emissionsregelung einer Verbrennungskraftmaschine |
SE542561C2 (en) | 2018-06-11 | 2020-06-09 | Scania Cv Ab | Method and system determining a reference value with regard to exhaust emissions |
GB2578155B (en) * | 2018-10-19 | 2021-01-13 | Delphi Automotive Systems Lux | Method of controlling vehicle emissions |
CN112282949B (zh) * | 2020-09-23 | 2021-07-16 | 北汽福田汽车股份有限公司 | 电控汽油机起燃工况控制参数优化方法、装置以及车辆 |
IT202100020744A1 (it) * | 2021-08-02 | 2023-02-02 | Fpt Motorenforschung Ag | Metodo di modellamento di un gruppo propulsore e di controllo del gruppo propulsore modellato |
JP7364000B1 (ja) | 2022-09-12 | 2023-10-18 | いすゞ自動車株式会社 | NOx発生量制御装置 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6417852B2 (en) * | 2000-03-09 | 2002-07-09 | Vladimir Sevastyanov | Method of visualization and graphical analysis for multidimensional functions |
DE10104151A1 (de) * | 2001-01-30 | 2002-09-05 | Alstom Switzerland Ltd | Verfahren zur Herstellung einer Brenneranlage |
DE10104150A1 (de) * | 2001-01-30 | 2002-09-05 | Alstom Switzerland Ltd | Brenneranlage und Verfahren zu ihrem Betrieb |
US7398257B2 (en) * | 2003-12-24 | 2008-07-08 | Yamaha Hatsudoki Kabushiki Kaisha | Multiobjective optimization apparatus, multiobjective optimization method and multiobjective optimization program |
DE102006007122A1 (de) * | 2006-02-16 | 2007-08-23 | Daimlerchrysler Ag | Verfahren zum Betreiben eines Verbrennungsmotors und einer daran angeschlossenen Abgasnachbehandlungseinrichtung |
US7921371B1 (en) * | 2006-03-22 | 2011-04-05 | Versata Development Group, Inc. | System and method of interactive, multi-objective visualization |
JP2008234439A (ja) * | 2007-03-22 | 2008-10-02 | Toyota Motor Corp | 自動適合装置及び方法 |
JP4928484B2 (ja) * | 2008-02-29 | 2012-05-09 | 株式会社小野測器 | エンジンの設計変数を計算する方法、コンピュータ、及びプログラム |
US20110264353A1 (en) | 2010-04-22 | 2011-10-27 | Atkinson Christopher M | Model-based optimized engine control |
JP5565295B2 (ja) | 2010-12-21 | 2014-08-06 | ダイヤモンド電機株式会社 | 内燃機関の排気ガス再循環制御装置 |
AT510328A2 (de) * | 2011-12-12 | 2012-03-15 | Avl List Gmbh | Verfahren zur auswertung der lösung eines multikriteriellen optimierungsproblems |
US10082778B2 (en) * | 2014-06-20 | 2018-09-25 | Veritone Alpha, Inc. | Managing coordinated control by multiple decision modules |
-
2015
- 2015-11-17 KR KR1020177013137A patent/KR101836787B1/ko active IP Right Grant
- 2015-11-17 DE DE102015222684.0A patent/DE102015222684B4/de active Active
- 2015-11-17 CN CN201580061916.0A patent/CN107002576B/zh active Active
- 2015-11-17 EP EP15795168.2A patent/EP3221573B1/de active Active
- 2015-11-17 WO PCT/EP2015/076845 patent/WO2016079132A1/de active Application Filing
-
2017
- 2017-05-16 US US15/596,013 patent/US10690075B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
WO2016079132A1 (de) | 2016-05-26 |
CN107002576B (zh) | 2020-10-23 |
US10690075B2 (en) | 2020-06-23 |
US20170248091A1 (en) | 2017-08-31 |
DE102015222684B4 (de) | 2019-11-07 |
DE102015222684A1 (de) | 2016-05-19 |
KR101836787B1 (ko) | 2018-04-19 |
EP3221573B1 (de) | 2020-04-22 |
KR20170067890A (ko) | 2017-06-16 |
CN107002576A (zh) | 2017-08-01 |
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