DE102017220612A1 - Method for volumetric control of a dosing system - Google Patents
Method for volumetric control of a dosing system Download PDFInfo
- Publication number
- DE102017220612A1 DE102017220612A1 DE102017220612.8A DE102017220612A DE102017220612A1 DE 102017220612 A1 DE102017220612 A1 DE 102017220612A1 DE 102017220612 A DE102017220612 A DE 102017220612A DE 102017220612 A1 DE102017220612 A1 DE 102017220612A1
- Authority
- DE
- Germany
- Prior art keywords
- actuator
- actuator characteristic
- pressure
- characteristic
- metering
- 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.)
- Pending
Links
Images
Classifications
-
- 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
- F01N9/00—Electrical control of exhaust gas treating apparatus
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D11/00—Control of flow ratio
- G05D11/02—Controlling ratio of two or more flows of fluid or fluent material
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D7/00—Control of flow
- G05D7/06—Control of flow characterised by the use of electric means
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D7/00—Control of flow
- G05D7/06—Control of flow characterised by the use of electric means
- G05D7/0617—Control of flow characterised by the use of electric means specially adapted for fluid materials
- G05D7/0629—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means
- G05D7/0688—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means by combined action on throttling means and flow sources
-
- 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, e.g. for catalytic activity
-
- 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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
-
- 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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1433—Pumps
-
- 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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1433—Pumps
- F01N2610/144—Control thereof
-
- 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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
-
- 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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
- F01N2610/146—Control thereof, e.g. control of injectors or injection valves
-
- 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
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/18—Parameters used for exhaust control or diagnosing said parameters being related to the system for adding a substance into the exhaust
- F01N2900/1806—Properties of reducing agent or dosing system
-
- 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
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/18—Parameters used for exhaust control or diagnosing said parameters being related to the system for adding a substance into the exhaust
- F01N2900/1806—Properties of reducing agent or dosing system
- F01N2900/1808—Pressure
-
- 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
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/18—Parameters used for exhaust control or diagnosing said parameters being related to the system for adding a substance into the exhaust
- F01N2900/1806—Properties of reducing agent or dosing system
- F01N2900/1821—Injector parameters
-
- 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
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/18—Parameters used for exhaust control or diagnosing said parameters being related to the system for adding a substance into the exhaust
- F01N2900/1806—Properties of reducing agent or dosing system
- F01N2900/1822—Pump parameters
-
- 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
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
-
- 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)
- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- General Physics & Mathematics (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Flow Control (AREA)
- Exhaust Gas After Treatment (AREA)
- Control Of Fluid Pressure (AREA)
Abstract
Die Erfindung betrifft ein Verfahren zur volumetrischen Regelung eines Dosiersystems mit mehreren Dosierventilen und/oder mit mehreren Förderpumpen. Dabei wird eine Aktorenkennlinie (K, K) mindestens eines der Dosierventile zu mindestens einer Aktorenkennlinie (K, K) eines der anderen Dosierventile hin verschoben und/oder eine Aktorenkennlinie (K) mindestens einer der Förderpumpen wird zu mindestens einer Aktorenkennlinie (K) einer der anderen Förderpumpen hin verschoben.The invention relates to a method for the volumetric control of a metering system with a plurality of metering valves and / or with a plurality of feed pumps. An actuator characteristic (K, K) of at least one of the metering valves is shifted towards at least one actuator characteristic (K, K) of one of the other metering valves and / or an actuator characteristic (K) of at least one of the delivery pumps becomes at least one actuator characteristic (K) of one of the shifted to other feed pumps.
Description
Die vorliegende Erfindung betrifft ein Verfahren zur volumetrischen Regelung eines Dosiersystems. Des Weiteren betrifft die vorliegende Erfindung ein Computerprogramm, das jeden Schritt des Verfahrens ausführt, sowie ein maschinenlesbares Speichermedium, welches das Computerprogramm speichert. Schließlich betrifft die Erfindung ein elektronisches Steuergerät, welches eingerichtet ist, um das Verfahren auszuführen.The present invention relates to a method for volumetric control of a dosing system. Furthermore, the present invention relates to a computer program executing each step of the method and to a machine-readable storage medium storing the computer program. Finally, the invention relates to an electronic control device which is set up to carry out the method.
Stand der TechnikState of the art
Zur Reduktion von Stickoxiden (NOx) im Abgas von Kraftfahrzeugen werden unter anderem SCR-Katalysatoren verwendet (Selective Catalytic Reduction). Stickoxidmoleküle werden auf der Katalysatoroberfläche bei Vorhandensein von Ammoniak als Reduktionsmittel zu elementarem Stickstoff reduziert. Das Reduktionsmittel wird in Form einer ammoniakabspaltenden Harnstoffwasserlösung (HWL) zur Verfügung gestellt, welche kommerziell unter dem Namen AdBlue® erhältlich ist. Diese wird durch ein Dosierventil stromaufwärts des SCR-Katalysators in den Abgasstrang eingespritzt.For the reduction of nitrogen oxides (NOx) in the exhaust of motor vehicles SCR catalysts are used (Selective Catalytic Reduction). Nitrogen oxide molecules are reduced to elemental nitrogen on the catalyst surface in the presence of ammonia as a reducing agent. The reducing agent is in the form of a ammoniakabspaltenden urea solution (HWL) provided, which is commercially available under the name AdBlue ®. This is injected into the exhaust line through a metering valve upstream of the SCR catalyst.
SCR-Katalysatorsysteme weisen häufig ein volumetrisch geregeltes Dosiersystem auf. Dieses verfügt meist über genau eine Förderpumpe und genau ein Dosierventil, welche beide über eine Mengenanforderung gesteuert werden. Ein Rücklauf ist nicht vorhanden. Solche Dosiersysteme gewährleisten theoretisch einen konstanten Systemdruck, da Förder- und Dosiereinheit im Idealfall zu jeder Zeit den gleichen Massestrom liefern. Der Systemdruck stellt sich über die Toleranzlage dieser beiden Komponenten ein. Normalerweise erfolgt eine Art Selbstregelung des Systemdrucks, da die Förderpumpe und das Dosierventil entgegengesetzte Druckgradienten aufweisen. Die Systemmengentoleranz eines solchen volumetrischen Systems ist geringer als die Toleranz der Einzelkomponenten. Auch ist sie niedriger als die eines druckgeregelten Systems, da hier die Toleranz des Druckventils und die Toleranz des Drucksensors die Systemmengentoleranz bestimmen.SCR catalyst systems often have a volumetrically controlled dosing system. This usually has exactly one feed pump and exactly one metering valve, both of which are controlled by a quantity request. A return is not available. Such metering systems theoretically ensure a constant system pressure, since the delivery and metering units ideally deliver the same mass flow at all times. The system pressure adjusts itself over the tolerance position of these two components. Normally, a kind of self-regulation of the system pressure takes place, since the delivery pump and the metering valve have opposite pressure gradients. The system volume tolerance of such a volumetric system is less than the tolerance of the individual components. Also, it is lower than that of a pressure-controlled system, since the tolerance of the pressure valve and the tolerance of the pressure sensor determine the system quantity tolerance.
Einige Dosiersysteme für SCR-Katalysatoren werden jedoch mit mehr als einer Dosierstelle betrieben. Hierbei geht der Vorteil eines volumetrischen Systems verloren, da das System nicht mehr einen sondern zwei Gleichgewichtszustände hat, zwischen denen es hin und her wandert. Beim Umschalten von einem Ventil auf das andere wird beispielsweise durch das zweite Ventil dosiert, während der Systemdruck noch den Gleichgewichtsdruck aus Pumpe und erstem Ventil entspricht. Der daraus entstehende Mengenfehler kann somit höher sein, als in einem rein druckgeregelten System.However, some dosing systems for SCR catalysts are operated with more than one dosing point. Here, the advantage of a volumetric system is lost because the system has no more one but two equilibrium states, between which it wanders back and forth. When switching from one valve to the other, for example, is metered by the second valve, while the system pressure still corresponds to the equilibrium pressure from the pump and the first valve. The resulting quantity error can thus be higher than in a purely pressure-controlled system.
Offenbarung der ErfindungDisclosure of the invention
Das Verfahren ist zur volumetrischen Regelung eines Dosiersystems mit mehreren Dosierventilen und/oder mit mehreren Förderpumpen vorgesehen, also einem Dosiersystem mit mehreren Gleichgewichtszuständen. Das Dosiersystem kann insbesondere ein Dosiersystem eines SCR-Katalysatorsystems sein. Um zu erreichen, dass das volumetrische System im Wesentlichen wieder nur einen Gleichgewichtszustand besitzt, wird eine Aktorenkennlinie mindestens eines der Dosierventile, zu mindestens einer Aktorenkennlinie eines anderen Dosierventils hin verschoben, um die Dosierventile in ihrer Toleranzlage gleichzustellen und/oder eine Aktorenkennlinie mindestens einer der Förderpumpen wird zu mindestens eine Aktorenkennlinie einer der anderen Förderpumpen hin verschoben, um die Förderpumpen in ihrer Toleranzlage gleichzustellen.The method is provided for the volumetric control of a metering system with a plurality of metering valves and / or with a plurality of delivery pumps, that is to say a metering system having a plurality of equilibrium states. The metering system may in particular be a metering system of an SCR catalyst system. In order to achieve that the volumetric system essentially only has an equilibrium state again, an actuator characteristic of at least one of the metering valves is shifted towards at least one actuator characteristic of another metering valve in order to equate the metering valves in their tolerance position and / or an actuator characteristic of at least one of the delivery pumps is shifted to at least one actuator characteristic of one of the other feed pumps back to equalize the feed pumps in their tolerance position.
Grundsätzlich kann eine Verbesserung der Toleranz bereits erreicht werden, indem nur eine Aktorenkennlinie verschoben wird. Bevorzugt werden aber alle Aktorenkennlinien der Dosierventile zu mindestens einer Aktorenkennlinie eines anderen Dosierventils hin verschoben und/oder alle Aktorenkennlinien der Förderpumpe werden zu mindestens einer Aktorenkennlinie einer der anderen Förderpumpen hin verschoben. Auf diese Weise kann die größtmögliche Systemmengentoleranz erreicht werden.Basically, an improvement in the tolerance can already be achieved by only one Aktorenkennlinie is moved. Preferably, however, all actuator characteristics of the metering valves are shifted toward at least one actuator characteristic of another metering valve and / or all actuator characteristics of the delivery pump are shifted toward at least one actuator characteristic of one of the other delivery pumps. In this way, the greatest possible system tolerance can be achieved.
In den Aktorenkennlinien ist insbesondere jeweils ein Massenstrom in Abhängigkeiten des Drucks im Dosiersystem hinterlegt. Im Falle einer Aktorenkennlinie eines Dosierventils handelt sich dabei um den Massenstrom durch das Dosierventil und im Falle einer Aktorenkennlinie einer Förderpumpe handelt es sich um den Massenstrom durch die Förderpumpe. Der Druck ist insbesondere ein Druck in einer Druckleitung zwischen der Förderpumpe oder den Förderpumpen und dem Dosierventil oder den Dosierventilen.In particular, a mass flow depending on the pressure in the metering system is stored in the actuator characteristics. In the case of an actuator characteristic of a metering valve, this is the mass flow through the metering valve and in the case of an actuator characteristic of a feed pump is the mass flow through the feed pump. The pressure is in particular a pressure in a pressure line between the feed pump or the feed pumps and the metering valve or metering valves.
Das Verschieben der Aktorenkennlinie kann in unterschiedlichen Ausführungsformen des Verfahrens auf unterschiedliche Weise erfolgen. In einer Ausführungsform erfolgt es durch ein Vertrimmen der Aktorenkennlinie. In einer anderen Ausführungsform erfolgt es durch eine Veränderung einer Ansteuerdauer des jeweiligen Aktors.The shifting of the actuator characteristic can be done in different embodiments of the method in different ways. In one embodiment, it is done by disarming the actuator characteristic. In another embodiment, it is done by changing a drive time of the respective actuator.
Auch die Verschiebung der mindestens einen Aktorenkennlinie einer Förderpumpe oder eines Dosierventils kann in unterschiedlichen Ausführungsformen des Verfahrens auf unterschiedliche Weise erfolgen. In einer Ausführungsform für die Verschiebung mittels eines PI-Reglers berechnet. In einer anderen Ausführungsform wird die Verschiebung aus Nominalgrößen und aus Messgrößen berechnet. Als Eingangsgröße für den PI-Regler oder als Nominalgröße und Messgröße kann in der Berechnung insbesondere ein Druck im Dosiersystem berücksichtigt werden. Hierbei handelt es sich insbesondere um den Druck in einer Druckleitung zwischen der Förderpumpe oder den Förderpumpen und dem Dosierventil oder Dosierventilen.Also, the displacement of the at least one actuator characteristic of a feed pump or a metering valve can take place in different embodiments of the method in different ways. In one embodiment, the displacement is calculated by means of a PI controller. In another embodiment, the shift is calculated from nominal quantities and from measured quantities. As input for the PI-controller or as Nominal size and measured variable, in particular a pressure in the dosing system can be taken into account in the calculation. This is, in particular, the pressure in a pressure line between the feed pump or the feed pumps and the metering valve or metering valves.
Das Computerprogramm ist eingerichtet, jeden Schritt des Verfahrens durchzuführen, insbesondere wenn es auf einem Rechengerät oder elektronischem Steuergerät abläuft. Es ermöglicht die Implementierung des Verfahrens in einem herkömmlichen elektronischen Steuergerät, ohne hieran bauliche Veränderungen vornehmen zu müssen. Hierzu ist es auf dem maschinenlesbaren Speichermedium gespeichert. Durch Aufspielen des Computerprogramms auf ein herkömmliches elektronisches Steuergerät wird ein elektronisches Steuergerät erhalten, welches eingerichtet ist, um ein Dosiersystem mittels des Verfahrens volumetrisch zu regeln.The computer program is set up to perform each step of the method, especially when running on a computing device or electronic control unit. It allows the implementation of the method in a conventional electronic control unit without having to make any structural changes. For this purpose it is stored on the machine-readable storage medium. By loading the computer program onto a conventional electronic control unit, an electronic control unit is obtained, which is set up to volumetrically control a dosing system by means of the method.
Figurenlistelist of figures
Ausführungsbeispiele der Erfindung sind in den Zeichnungen dargestellt und in der nachfolgenden Beschreibung mehr erläutert.
-
1 zeigt ein Dosiersystem gemäß dem Stand der Technik mit einem Dosierventil. -
2 zeigt Aktorenkennlinien einer volumetrischen Regelung des Dosierventils gemäß1 . -
3 zeigt Aktorenkennlinien einer volumetrischen Regelung des Dosierventils gemäß1 bei einem Defekt des Dosierventils. -
4 zeigt ein Dosiersystem mit zwei Dosierventilen gemäß dem Stand der Technik. -
5 zeigt Aktorenkennlinien einer volumetrischen Regelung des Dosierventils gemäß4 . -
6 zeigt Aktorenkennlinien einer volumetrischen Regelung des Dosierventils gemäß4 , welche in einem Ausführungsbeispiel des erfindungsgemäßen Verfahrens verschoben wurden.
-
1 shows a metering system according to the prior art with a metering valve. -
2 shows actuator characteristics of a volumetric control of the metering according to1 , -
3 shows actuator characteristics of a volumetric control of the metering according to1 in case of a defect of the metering valve. -
4 shows a metering system with two metering valves according to the prior art. -
5 shows actuator characteristics of a volumetric control of the metering according to4 , -
6 shows actuator characteristics of a volumetric control of the metering according to4 , which have been moved in an embodiment of the method according to the invention.
Ausführungsbeispiele der ErfindungEmbodiments of the invention
Eine volumetrische Regelung des Dosiersystems
In
In
In
Claims (10)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102017220612.8A DE102017220612A1 (en) | 2017-11-17 | 2017-11-17 | Method for volumetric control of a dosing system |
KR1020180139618A KR102528247B1 (en) | 2017-11-17 | 2018-11-14 | Method for the volumetric regulation of a metering system |
CN201811366810.3A CN109798171B (en) | 2017-11-17 | 2018-11-16 | Method for the volumetric adjustment of a metering system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102017220612.8A DE102017220612A1 (en) | 2017-11-17 | 2017-11-17 | Method for volumetric control of a dosing system |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102017220612A1 true DE102017220612A1 (en) | 2019-05-23 |
Family
ID=66336499
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102017220612.8A Pending DE102017220612A1 (en) | 2017-11-17 | 2017-11-17 | Method for volumetric control of a dosing system |
Country Status (3)
Country | Link |
---|---|
KR (1) | KR102528247B1 (en) |
CN (1) | CN109798171B (en) |
DE (1) | DE102017220612A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102020107451A1 (en) | 2020-03-18 | 2021-09-23 | Volkswagen Aktiengesellschaft | Method for controlling and correcting the injection quantity of a pressure-regulated metering system for exhaust gas aftertreatment of an internal combustion engine |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU1225923A1 (en) * | 1983-11-23 | 1986-04-23 | Украинское Отделение Всесоюзного Ордена Ленина Проектно-Изыскательского И Научно-Исследовательского Института "Гидропроект" Им.С.Я.Жука | Method of regulating pump-to-pipeline system flow rate |
DE19536571C2 (en) | 1995-09-29 | 1998-09-03 | Siemens Ag | Method and device for metering the input of a reducing agent into the exhaust gas or exhaust air stream of an incineration plant |
DE102004054238A1 (en) * | 2004-11-10 | 2006-05-11 | Robert Bosch Gmbh | Dosing system and method for operating a dosing system |
DE102006044771B4 (en) * | 2006-09-22 | 2019-03-28 | Robert Bosch Gmbh | Method and control unit for determining an error of an injection quantity of an injection control element of an internal combustion engine which is controlled with a control duration |
AT505031B1 (en) | 2006-12-13 | 2008-10-15 | Sandvik Mining & Constr Oy | METHOD OF IDENTIFYING CONSUMPTION OF MEDICAL DEVICES AND DEVICE FOR CARRYING OUT THIS METHOD |
DE102009010517A1 (en) * | 2009-02-25 | 2010-08-26 | Emitec Gesellschaft Für Emissionstechnologie Mbh | Method for operating an exhaust system |
DE102009045989A1 (en) * | 2009-10-26 | 2011-04-28 | Robert Bosch Gmbh | Method for monitoring heating system for reducing agent tank and dosing device of selective catalytic reduction catalyst system to operate internal combustion engine of motor vehicle, involves closing short circuit |
DE102011080227B4 (en) * | 2011-08-01 | 2022-05-25 | Continental Teves Ag & Co. Ohg | Method, use and vehicle brake system for optimizing the pressure setting accuracy |
-
2017
- 2017-11-17 DE DE102017220612.8A patent/DE102017220612A1/en active Pending
-
2018
- 2018-11-14 KR KR1020180139618A patent/KR102528247B1/en active IP Right Grant
- 2018-11-16 CN CN201811366810.3A patent/CN109798171B/en active Active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102020107451A1 (en) | 2020-03-18 | 2021-09-23 | Volkswagen Aktiengesellschaft | Method for controlling and correcting the injection quantity of a pressure-regulated metering system for exhaust gas aftertreatment of an internal combustion engine |
Also Published As
Publication number | Publication date |
---|---|
KR20190056982A (en) | 2019-05-27 |
KR102528247B1 (en) | 2023-05-03 |
CN109798171A (en) | 2019-05-24 |
CN109798171B (en) | 2022-04-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0837986B1 (en) | Device and process to regulate fuel pressure in a high pressure accumulator | |
DE102008021384B3 (en) | Superimposed pressure control of the common rail system | |
DE102010029340A1 (en) | Method for operating selective catalytic reduction catalyst that is arranged in exhaust line of combustion engine, involves dosing liquid reducing agent solution through metering values that are controlled by predetermined dosing pattern | |
EP3469195B1 (en) | Method for emptying a reducing agent delivery system belonging to an scr catalytic converter | |
DE112016004323T5 (en) | Systems and methods for increasing diesel exhaust fluid delivery capacity | |
WO2008019919A1 (en) | Method for the determination of a rail pressure nominal value | |
DE102015212697B4 (en) | Method for operating an exhaust gas aftertreatment system with an SCR catalytic converter, control device for such an exhaust gas aftertreatment system, exhaust gas aftertreatment system and internal combustion engine | |
DE102017220612A1 (en) | Method for volumetric control of a dosing system | |
EP1826385A1 (en) | Method for operating an injection system for a combustion engine | |
DE102012213525A1 (en) | Method for monitoring of conveying and dosing system for selective catalytic reduction catalyst in internal combustion engine, involves carrying out comparison measurement with internal reference for monitoring functioning of dosing module | |
WO2019042787A1 (en) | Method and device for determining the injection quantity or the injection rate of a fluid injected into a reaction space by means of an injector | |
DE102019001677B4 (en) | Method for predicting the condition of an injector | |
DE102015216222A1 (en) | Method for component control in a dosing system | |
WO2021008978A1 (en) | Method for operating a system with a plurality of metering valves | |
EP3604753A1 (en) | Method for operating an scr system in the event of a fault | |
DE102020202511A1 (en) | Process for the realization of increased dosing mass accuracy in pressure-regulated dosing systems with at least two throttle valves | |
DE112018004151T5 (en) | System and method for diagnosing the functionality of metering units of a fluid metering system | |
DE102019003815B4 (en) | Method for monitoring an injector for mechanical damage | |
DE102018203757A1 (en) | Method for operating an SCR system with at least two metering valves | |
DE102020212961B4 (en) | Method for operating a conveyor device | |
EP3670907B1 (en) | Method for operating a pump and system comprising such a pump | |
DE102020202134A1 (en) | Method of operating a dosing agent system | |
DE102018200440A1 (en) | Method of controlling a metering system with multiple metering valves | |
DE102020206335A1 (en) | Method for operating a conveyor and metering system | |
DE102016203226A1 (en) | A method of operating an exhaust aftertreatment system of a motor vehicle |