Method and apparatus for thawing frozen reducing agent in an SCR system
Patent Information
- Authority / Receiving Office
- DE · DE
- Patent Type
- Patents
- Current Assignee / Owner
- SCANIA CV AB
- Filing Date
- 2014-12-09
- Publication Date
- 2026-07-23
Abstract
Description
Technical area
[0001] The present invention relates to a method in an SCR system. The invention also relates to a computer program product comprising program code for a computer to implement a method according to the invention. The invention also relates to an SCR system and a motor vehicle equipped with such an SCR system. background
[0002] In vehicles today, for example, urea is used as a reducing agent in SCR systems that include an SCR catalyst, where the reducing agent and NO are present in this catalyst. x -gas can react and be converted into nitrogen and water. Various types of reducing agents can be used in SCR systems. These reducing agents have different freezing points. AdBlue, for example, is a commonly used reducing agent.
[0003] In one type of SCR system, a container holding a reducing agent is included. The SCR system also has a pump designed to draw the reducing agent from the container via a suction pipe and add it through a pressurized hose to a metering device located in the vehicle's exhaust system. The metering device is designed to inject the required amount of reducing agent into the exhaust system upstream of the SCR catalyst, according to operating sequences stored in the vehicle's control unit.
[0004] The reducing agent can have a freezing point in the range of -10 to -15 degrees Celsius. Different reducing agents have specific freezing points depending on factors such as their composition. For example, the freezing point of AdBlue is approximately -11 degrees Celsius. Consequently, the reducing agent freezes in the reservoir and other parts of the SCR system if the ambient temperature remains below this freezing point for a certain period of time.
[0005] According to current emissions regulations, certain vehicles equipped with an SCR system must be operated normally for a specified period after starting the engine. This period could be, for example, 70 minutes. Consequently, frozen reducing agent must be at least partially thawed to allow it to circulate within the SCR system before dosing begins within this timeframe.
[0006] A known method for determining whether it is appropriate to start the pump and dose the reducing agent involves using a temperature sensor placed inside the tank to measure the temperature of the reducing agent. This allows for a reasonable degree of estimation as to whether the reducing agent in the tank has thawed. A disadvantage of this method is that temperature measurements do not always provide a reliable assessment, depending on factors such as the sensor's location, the configuration of the suction hose, and the tank's configuration and size. Furthermore, the temperature sensor itself is subject to a degree of measurement inaccuracy. Therefore, substantial safety margins are necessary to prevent the pump in the SCR system from starting prematurely.If the pump is started too early, when an insufficient amount of the reducing agent has thawed, there is a risk that the pump will "run dry," which can have several undesirable effects. One example of such an undesirable effect is the ingress of air into the SCR system, which can significantly impair the system's performance. Furthermore, it prevents the effective thawing of any remaining frozen reducing agent. In cases where a circulating reducing agent is used to cool a reducing agent dosing unit, the latter can overheat if the circulation is interrupted or absent.
[0007] In some cases where frozen reducing agent is thawed in the tank, for example with a circulating heating medium, and the pump runs dry, a situation may arise where further thawing of the frozen reducing agent in the container with the circulating heating medium may not be possible. This can have very serious consequences if applicable legal requirements regarding vehicle emissions are not met within the required timeframe. Furthermore, there is a risk of permanent damage to the pump or excessive wear if it starts too early.
[0008] WO 2012 / 113669 describes a method for melting urea solution in an SCR system, taking into account the temperature of the urea solution and the amount of urea solution in a container for the urea solution. Summary of the invention
[0009] Therefore, it is necessary to reliably assess whether a pump in the SCR system, where the reducing agent is frozen, can be started without using excessively high safety margins to avoid undesirable effects in case the pump has to run dry.
[0010] One object of the present invention is to provide a new and advantageous method for an SCR system.
[0011] Another object of the present invention is the provision of a new and advantageous SCR system and a new and advantageous computer program for an SCR system.
[0012] Another object of the present invention is to provide an alternative method for an SCR system, an alternative SCR system and an alternative computer program for an SCR system in a motor vehicle when a reducing agent for exhaust gas purification is at least partially frozen.
[0013] Another object of the invention is to provide a method for an SCR system, an SCR system and a computer program for reliably starting up an SCR system in a motor vehicle.
[0014] Another object of the invention is to provide a method for an SCR system, an SCR system and a computer program to achieve improved performance in a motor vehicle.
[0015] Some of the problems are solved using a method for an SCR system according to claim 1. Other problems are solved using an SCR system according to claim 7. The preferred embodiments are listed in the dependent claims.
[0016] According to one aspect of the invention, a method for an SCR system is provided, comprising a pump and a dosing unit, and comprising the following steps: – Determining the need to heat a reducing agent for exhaust gas purification that is located in a container; – if a need for heating was identified, continuous heating of the reducing agent using a heating medium circulating through the container; – continuous determination of the temperature of the reducing agent in the container; – Determining the fill level of the reducing agent in the container; – continuous determination of an accumulated amount of thawed reducing agent; – Determine that initiating the recirculation of the reducing agent is appropriate when the measured temperature of the reducing agent in the container exceeds a predetermined initial temperature value, and / or when the measured accumulated quantity of thawed reducing agent exceeds a predetermined initial quantity value; and / or – Determine that starting the dosing of the reducing agent is appropriate when the determined temperature of the reducing agent in the container exceeds a predetermined second temperature value, and / or when the determined accumulated quantity of thawed reducing agent exceeds a predetermined second quantity value; taking into account the fill level of the reducing agent in the container when determining the appropriateness of starting up, which relates to circulation and / or dosing.
[0017] Advantageously, according to one aspect of the invention, it is possible to determine when the dosage or consumption of reducing agent can be started.
[0018] According to one aspect of the invention, a method for an SCR system comprising a pump and a dosing unit is provided, comprising the following steps: – Determining the need to heat a reducing agent for exhaust gas purification that is located in a container; – if a need for heating was identified, continuous heating of the reducing agent using a heating medium circulating through the container; – continuous determination of the temperature of the reducing agent in the container; – Determining the fill level of the reducing agent in the container; – continuous determination of an accumulated amount of thawed reducing agent; – Determine that starting the recirculation of the reducing agent is appropriate when the determined temperature of the reducing agent in the container exceeds a predetermined first temperature value, and / or when the determined accumulated quantity of thawed reducing agent exceeds a predetermined first quantity value; – when determining the suitability of starting up, which relates to the circulation, taking into account the fill level of the reducing agent in the container; – where appropriate, start the circulation of the reducing agent.
[0019] According to one aspect of the invention, a method for an SCR system comprising a pump and a dosing unit is provided, comprising the following steps: – Determining the need to heat a reducing agent for exhaust gas purification that is located in a container; – if a need for heating was identified, continuous heating of the reducing agent using a heating medium circulating through the container; – continuous determination of the temperature of the reducing agent in the container; – Determining the fill level of the reducing agent in the container; – continuous determination of an accumulated amount of thawed reducing agent; – Determine that it is appropriate to start dosing the reducing agent when the determined temperature of the reducing agent in the container exceeds a predetermined second temperature value, and / or when the determined accumulated quantity of thawed reducing agent exceeds a predetermined second quantity value; – when determining the appropriateness of the start-up, which relates to the dosage, taking into account the fill level of the reducing agent in the container, and – where appropriate, activate the dosage of the reducing agent.
[0020] When the reducing agent level in the container is reduced compared to its maximum possible level, the reducing agent is exposed to a lesser degree in some heating configurations. A predominant reducing agent level in the container can be taken into account when calculating the predominant thawed quantity of reducing agent in the container. This can advantageously be done using a factor, where a reduced reducing agent level in the container results in an increased quantity of thawed reducing agent required to start up the recirculation and / or dosing of reducing agent. The multiplier could, for example, be 25% if the container is half full.The multiplier can be, for example, 50% when the container is one-quarter full. The multiplier can be implemented in fixed, discrete steps or continuously.
[0021] Taking into account the level of the reducing agent in the container, the start-up of the reducing agent circulation and / or the start-up of the reducing agent dosing can be carried out under essentially optimal conditions within the set time and with a sufficient quantity of thawed reducing agent to ensure safe and reliable operation of the SCR system.
[0022] The process may include the following step: – Determining the first temperature value, the second temperature value, the first quantity value, and the second quantity value based on the determined fill level. This ensures safe, robust, and reliable operation of the SCR system.
[0023] The procedure may also include the following step: – Adding extra warm-up time after the system has reached optimal operating temperature to compensate for a reduced level of reducing agent compared to the maximum possible level in the tank. This ensures safe, robust, and reliable operation of the SCR system.
[0024] The procedure may also include the following step: – Increasing the first temperature value, the second temperature value, the first quantity value, and the second quantity value to compensate for a reduced fill level compared to the maximum possible fill level of the reducing agent in the container. Consequently, a simple and automated process is achieved to ensure reliable operation of the SCR system. Therefore, a cost-effective method is provided that achieves at least some of the objectives.
[0025] The procedure may also include the following step: – Increase the first temperature value, the second temperature value, the first quantity value, and the second quantity value based on the determined fill level of the reducing agent. This is done to compensate for a reduced fill level compared to a possible maximum fill level of the reducing agent in the container.
[0026] The procedure may also include the following step: – Taking into account the level of the reducing agent in the container when determining the suitability of starting up, which relates only to the dosage.
[0027] The procedure may also include the following step: – Compensating for a reduced fill level compared to a possible maximum fill level, so that the warm-up time before each start-up is longer the more the fill level is reduced.
[0028] Consequently, both the start of the cycle and the start of the dosing can be appropriately delayed compared to the prior art in order to achieve a reliable process for an SCR system, wherein at least part of the reducing agent is present in the container in solid (frozen) form.
[0029] The procedure may also include the following step: – Activating the start-up of the circulation and dosing when it has been determined that starting up is appropriate.
[0030] Advantageously, the amount of thawed reducing agent contained in containers partially filled with reducing agent is not too small when starting up the circulation of reducing agent and / or the dosing of reducing agent.
[0031] According to one aspect of the present invention, an SCR system is provided comprising a pump and a dosing unit, which includes the following: – Elements designed to detect the need to heat a reducing agent for exhaust gas purification located in a container; – Elements designed to continuously heat the reducing agent with a heating medium circulating through the container when a need for heating has been identified; – Elements designed to continuously determine the temperature of the reducing agent in the container; – Elements designed to detect the fill level of the reducing agent in the container; – Elements designed to continuously detect an accumulated amount of thawed reducing agent; – Elements designed to determine that initiating the recirculation of the reducing agent is appropriate when the measured temperature of the reducing agent in the container exceeds a predetermined initial temperature value, and / or when the measured accumulated quantity of thawed reducing agent exceeds a predetermined initial quantity value; and / or – Elements designed to determine that initiating the dosing of the reducing agent is appropriate when the determined temperature of the reducing agent in the container exceeds a predetermined second temperature value, and / or when the determined accumulated quantity of thawed reducing agent exceeds a predetermined second quantity value; and – Elements designed to take into account the level of reducing agent in the container when determining the suitability of starting up, relating to circulation and / or dosing;
[0032] The SCR system can include the following: – Elements designed to determine the first temperature value, the second temperature value, the first quantity value and the second quantity value based on the determined fill level.
[0033] The SCR system can include the following: – Elements designed to add additional heating time after the suitability of start-up has been achieved, in order to compensate for a reduced fill level compared to a possible maximum fill level of the reducing agent in the container.
[0034] The SCR system can include the following: – Elements designed to increase the first temperature value, the second temperature value, the first quantity value and the second quantity value to compensate for a reduced fill level compared to a possible maximum fill level of the reducing agent in the container.
[0035] The SCR system can include the following: – Elements designed to take into account the level of the reducing agent in the container when determining the suitability of starting up, which relates only to the dosage.
[0036] The SCR system can include the following: – Elements designed to compensate for a reduced fill level compared to a possible maximum fill level, so that the warm-up time before each start-up is longer the more the fill level is reduced.
[0037] The SCR system can include the following: – Elements designed to activate the start-up of the circulation and dosing when it has been determined that starting up is appropriate.
[0038] According to one aspect of the present invention, a motor vehicle is provided which includes an SCR system according to one of claims 7–12.
[0039] The motor vehicle can be a truck, a bus, or a passenger car.
[0040] According to one aspect of the present invention, a computer program for an SCR system is provided, wherein the computer program comprises program code that causes an electronic control device or a computer connected to the electronic control device to perform the steps according to any one of claims 1–6.
[0041] According to one aspect of the present invention, a computer program for an SCR system is provided, wherein the computer program comprises program code that causes an electronic control device or another computer connected to the electronic control device to perform the steps according to any one of claims 1–6 when the program code is executed in the electronic control device or in the other computer.
[0042] According to one aspect of the present invention, a computer program is provided in an SCR system, wherein the computer program comprises program code stored in a computer-readable medium to cause an electronic control device or a computer connected to the electronic control device to perform the steps according to any one of claims 1–6.
[0043] According to one aspect of the present invention, a computer program product is provided which comprises program code stored in a computer-readable medium to execute the method steps according to any one of claims 1–6 when the program code is executed in an electronic control device or in another computer connected to the electronic control device.
[0044] According to one aspect of the present invention, a computer program product is provided which comprises program code stored in a non-volatile manner on a computer-readable medium to perform the method steps according to any one of claims 1–6 when the program code is executed in an electronic control device or in another computer connected to the electronic control device.
[0045] Further objectives, advantages, and novel features of the present invention will be obvious to a person skilled in the art from the following details and through the application of the invention. While the invention is described below, it is understood that the invention is not limited to the details specifically described. A person skilled in the art who has access to the teachings presented herein will recognize additional applications, modifications, and incorporation into other fields that are within the scope of the invention. General description of the drawings
[0046] For a more complete understanding of the present invention and the additional problems and advantages thereof, reference is now made to the following detailed description, which should be read together with the accompanying drawings, in which the same reference designations refer to identical parts in the different figures and which show the following:
[0047] Fig. 1 schematically a vehicle according to an embodiment of the invention;
[0048] Fig. 2 schematically a subsystem of the in Fig. 1 vehicle shown according to an embodiment of the invention;
[0049] Fig. 3 schematically a subsystem of the in Fig. 1 vehicle shown according to an embodiment of the invention;
[0050] Fig. 4a schematically a flow diagram of a process according to an embodiment of the invention;
[0051] Fig. 4b schematically a more detailed flowchart of a method according to an embodiment of the invention;
[0052] Fig. 5 schematically a computer according to an embodiment of the invention. Detailed description of the characters
[0053] A side view of a vehicle 100 is with reference to Fig. 1 shown. The example vehicle 100consists of a tractor 110 and a trailer 112 The vehicle can be a heavy goods vehicle such as a truck or a bus. Alternatively, the vehicle can be a passenger car.
[0054] The term "connection" here refers to a communication link, which can be a fixed line such as an opto-electronic communication line or a non-fixed line such as a wireless connection, e.g. a radio or microwave connection.
[0055] In this document, the term "reducing agent" refers to a substance used to react with certain emissions in an SCR system. These emissions can include, for example, NOₓ. xThe reducing agent is a gas. According to one embodiment, it is also known as AdBlue. Obviously, other types of reducing agents can be used. In this document, AdBlue is provided as an example of a reducing agent; however, those skilled in the art will recognize that the innovative method and SCR system according to the invention can be implemented for other types of reducing agents with the necessary adjustments, such as adjustments to a suitable freezing point for selected reducing agents, and of control algorithms to execute program code according to the innovative method.
[0056] In this document, the term "heating element" refers to a device designed to heat an adjacent component, such as a pipe, pump, or metering unit, containing the reducing agent. The heating elements described herein are arranged to heat the reducing agent at various locations within the vehicle. 100 Heat. A heating element can be an electric heating element, powered, for example, by one or more batteries (not shown).
[0057] Alternatively, a heating element can be a coolant-based heating element that uses coolant from an engine in the vehicle to heat the reducing agent in a reducing agent container in the SCR system.
[0058] It should be noted that the invention is suitable for use in a suitable SCR system and is therefore not limited to SCR systems in motor vehicles. According to one aspect of the invention, the innovative method and the innovative SCR system are well suited for platforms other than motor vehicles that include an SCR system, for example, watercraft. The watercraft can be of any suitable type, such as motorboats, ships, ferries, or marine vessels.
[0059] According to one aspect of the invention, the innovative method and the innovative SCR system are also well suited for, for example, systems comprising tractors, tippers, machines, industrial engines and / or motor-driven industrial robots.
[0060] According to an aspect of the invention, the innovative method and the innovative SCR system are also well suited for various types of power plants, for example, power plants that include a diesel generator.
[0061] The innovative process and the innovative SCR system are also well suited for any suitable engine systems that include an SCR system, for example in a locomotive or other platform.
[0062] The innovative process and the innovative SCR system are well suited for a system that produces NO x -Generator includes, for example, a diesel engine whose exhaust gases need to be cleaned.
[0063] In this document, the term "pipe" refers to a passage for receiving and transporting liquid, such as a reducing agent in liquid form. The pipe can be of any size and made of any suitable material, such as plastic, rubber, or metal.
[0064] Fig. 2 shows a subsystem 299 in the vehicle 100 The subsystem 299 can be in a tractor 110 be arranged. The subsystem 299 can form part of an SCR system. According to this example, the subsystem comprises 299 a container 205 , which is designed to hold a reducing agent. The container 205 is designed to contain an appropriate amount of reducing agent, and is also designed to be filled as required.
[0065] A first pipe 271is designed to remove the reducing agent from the container 205 to a pump 230 leads to the pump. 230 is designed to remove the reducing agent from the container 205 via the first line 271 and via a second line 272 pumps to deliver the reducing agent to a dosing device 250 to add the pump 230 is designed so that it places the reducing agent in the second pipe 272 pressurized.
[0066] The dosing device 250 is designed to transfer the reducing agent to an exhaust system (not shown) in the vehicle 100 adds. More precisely, the dosing device 250 designed to deliver a suitable amount of reducing agent to an exhaust system in the vehicle in a controlled manner 100In this embodiment, an SCR catalyst (not shown) is arranged downstream of a position where the reducing agent is added. The amount of reducing agent added to the exhaust system is intended for use in the SCR catalyst to reduce the amount of unwanted emissions.
[0067] A third line 273 is between the dosing device 250 and the container 205 arranged. A third line 273 is arranged in such a way that it contains a certain amount of the reducing agent that enters the dosing device 250 was fed to the container 205 leads back.
[0068] A first liquid line 281 It is designed to hold and transport a liquid. The liquid is a heating medium. The liquid can be a coolant for an engine (not shown) in the vehicle. 100be. The first liquid line 281 is partially in the container 205 arranged to heat the reducing agent contained therein. The first liquid line 281 is partially in the container 205 arranged to heat any frozen reducing agent it may contain by energy transfer. According to this example, the first liquid line is 281 designed to transfer coolant heated by the vehicle's engine to the vehicle's engine 100 in a closed loop through the container 205 and a second fluid line 282 leads back.
[0069] According to an exemplary embodiment, a pump (not shown) is designed to pump the liquid through the first liquid line. 281 and the second fluid line 282 feeds to prevent the reducing agent in the container from heating up 205to achieve this. If the fluid includes coolant for the engine in the vehicle, the pump can consist of a normal coolant pump.
[0070] According to another exemplary embodiment, the liquid can pass through the first liquid line. 281 and the second fluid line 282 to be fed in order to prevent the reducing agent in the container from heating up. 205 via the pump 230 to achieve this. The pump is involved here. 230 It is designed to feed in both the reducing agent and the liquid. It should be noted that the reducing agent and the liquid are not mixed in this context, but are fed through separate loops.
[0071] The pump 230 It can also be called a feed element or circulation pump. The pump 230 can belong to any suitable type. The pump 230 It could be a diaphragm pump. The pump230 According to one embodiment, it can be heated with a circulating heating medium. For example, the first line can be... 271 be arranged so that they can access the pump 230 behind the container 205 Alternatively, the pump can be heated with a circulating heating medium provided by a device specifically designed for this purpose.
[0072] According to one embodiment, the first fluid line 281 partially configured as a spiral around the first line 271 and the third line 273 is arranged, which are located in the container 205 are located, as in Fig. 2 shown schematically. This ensures effective heating or thawing of reducing agent in the container. 205 achieved. The first fluid line 281 It can also have another suitable shape, for example a U-shape.
[0073] A first warming element 261 is on the second line 272 arranged to heat the reducing agent within it as needed. A second heating element 262 is at the metering valve 250 arranged to include both the metering valve 250 as well as heating the reducing agent within it, if necessary. A third heating element 263 is on the third line 273 arranged to heat the reducing agent within it as needed. The first heating element 261 , the second heating element 262 and the third heating element 263 They could be electrical heating elements.
[0074] According to an exemplary embodiment, the lines can 271 , 272 and 273They should be arranged so that they are heated by coolant used to cool the vehicle engine. So-called dual-channel lines can be used, with two separate passages for reducing agent and coolant positioned close together for effective heat transfer.
[0075] It should be noted that according to the invention it is possible to place a heating element at any suitable location within the subsystem. 299 to arrange, for example, inside the container 205 Various configurations of the heating element are possible. For example, the heating element can be placed in the container. 205They are arranged to heat reducing agents within them. The heating element can be an electric heating element. The heating element can comprise a suitable number of separate heating elements. The electric heating element can be a helical electrical loop, the loop being arranged around the conductors according to an example. 271 and 273 inside the container 205 It can be arranged.
[0076] A first control device 200 is designed to enable the operation of the first heating element 261 , of the second heating element 262 and the third heating element 263 controls in a suitable manner. The first control device 200 can be designed to control the operation of the first heating element 261 , of the second heating element 262 and the third heating element 263in a suitable manner. According to one embodiment, the first control device is designed to activate and operate the heating element when the circulation of the reducing agent in the SCR system is deemed appropriate.
[0077] The first control device 200 is designed to connect to a first temperature sensor via a connection L221 221 communicated. The first temperature sensor 221 is arranged such that it detects the prevailing temperature Tred of the reducing agent at the point where the sensor is attached. According to one embodiment, the first temperature sensor is 221 in the immediate vicinity of the first line 271 and / or the third line 273 in the container 205 arranged. According to one embodiment, the first temperature sensor 221 in the immediate vicinity of the first line 271 and / or the third line 273at the bottom of the container 205 arranged. According to one embodiment, the first temperature sensor 221 in a lower part of the container 205 arranged. The temperature sensor 221 is designed to continuously send signals to the first control device via connection L221 200 sends information about the prevailing temperature Tred of the reducing agent.
[0078] The first control device 200 is designed so that it connects to the pump via a L230 connection. 230 communicated. The first control device 200 is designed to operate the pump 230 controls, for example, the flow of the reducing agent within the subsystem 299 to control. The first control device 200is designed to activate the circulation of the reducing agent when deemed appropriate according to an embodiment of the present invention.
[0079] The first control device 200 is designed to work with the dosing device 250 communicates via an L250 connection. A first control device 200 is designed to enable the operation of the dosing device 250 controls, for example, the supply of reducing agent to the vehicle's exhaust system. 100 to control. The first control device 200 is designed to circulate the reducing agent via the pump 230 activated when deemed expedient according to an embodiment of the present invention. The first control device 200is designed to activate the dosing of the reducing agent when it is deemed appropriate according to an embodiment of the present invention.
[0080] A second control device 210 is designed so that it connects to the pump via a connection L210 200 communicates. The second control device 210 can be solved with the first control device 200 be connected. The second control device 210 can be a control device located outside the vehicle 100 The second control device is located 210 can be designed to execute the process steps according to the invention. The second control device 210 can be used to send program code to the first control device 200 to transmit, in particular program code for executing the method according to the invention. Optionally, the second control device 210be designed so that they are compatible with the first control device 200 communicates via an internal network within the vehicle. The second control device 210 can be designed to perform essentially similar functions to the first control device 200 executes.
[0081] According to the embodiment, which is schematically represented with reference to Fig. The first control device shown in 2 is the first control device. 200 is designed so that it powers the pump 230 so that, where applicable, at least some of the thawed reducing agent is removed from the container 205 is taken to heat it with at least one of the heating elements. 261 , 262 and 263 outside the container 205 to enable the first control device 200 It is also designed so that it can operate the pump. 230 so that the thawed part of the reducing agent enters the container205 is returned before the dosage of the same is administered via the dosing unit. 250 It starts in the SCR system.
[0082] Fig. 3 schematically represents a part of the subsystem 299 that with reference to Fig. 2 was described. Fig. 3. A portion of the information relating to Fig. 2 described components.
[0083] The first control device 200 is designed to connect to a second temperature sensor via a L222 connection. 222 communicated. The second temperature sensor 222 is designed so that it maintains a prevailing temperature T2 of the liquid in front of the container 205 continuously measures. The second temperature sensor 222 is designed to continuously send signals to the first control device via connection L222 200The second temperature sensor sends information about the prevailing temperature T2 of the liquid. 222 can be in the immediate vicinity of the container 205 on an upstream side of this or on the vehicle engine or at a suitable location between the engine and the container 205 be arranged.
[0084] The first control device 200 is designed to connect to a third temperature sensor via a connection L223 223 communicated. The third temperature sensor 223 is designed so that it maintains a prevailing temperature T3 of the liquid behind the container 205 continuously measures. The third temperature sensor 223 is designed to continuously send signals to the first control device via connection L223 200 sends information about the prevailing temperature T3 of the liquid. The third temperature sensor 223can be in the immediate vicinity of the container 205 on a downstream side of this or on the vehicle engine or at a suitable location between the engine and the container 205 be arranged. For example, the third temperature sensor can be 223 at the pump 230 be arranged.
[0085] According to one embodiment, the first control device 200 designed to work with the first temperature sensor 221 , the second temperature sensor 222 and the third temperature sensor 223 via the second control device 210 communicated, which is connected to the first temperature sensor 221 , the second temperature sensor 222 and the third temperature sensor 223 can be connected via a signal.
[0086] The first line 281 is arranged in such a way that it allows a heating fluid to enter the container 205It directs the flow to thaw frozen reducing agent. For example, the first line is located in the vehicle to cool an engine. During engine cooling, heat energy is transferred from the engine to the fluid. For example, the fluid is a coolant in an engine's cooling system. For example, the pump... 230 arranged so that they carry the liquid through the pipe 282 in a closed loop from the motor to the container 205 and circulated back to the engine. It should be noted that the reducing agent and the heating fluid are never mixed, but are kept separate by the lines.
[0087] According to an alternative embodiment, a heating medium can be used outside the vehicle. In this embodiment, a separate container with a heating medium can be used, and the container can be connected to a circulation line inside the vehicle. For the circulation of the heating fluid, either a feed device outside the vehicle or a feed device inside the vehicle, specifically designed for this purpose, can be used.
[0088] According to one embodiment, the first control device 200 based on the received signals, which indicate a prevailing temperature trend of the reducing agent at the location of the temperature sensor 221 and a prevailing temperature T2 of the liquid in front of the container 205 include, designed to enable the operation of the pump 230 and the dosing unit 250 controls.
[0089] According to one embodiment, the first control device 200 based on the received signals, which indicate a prevailing temperature trend of the reducing agent at the location of the temperature sensor 221 and a prevailing temperature T2 of the liquid in front of the container 205 include, designed to detect a temperature difference between them.
[0090] According to one embodiment, the first control device 200 based on the received signals, which indicate a prevailing temperature T3 of the liquid after the container 205 and a prevailing temperature T2 of the liquid in front of the container 205 comprise, designed to determine a temperature difference between them according to one aspect of the present invention.
[0091] The first control device 200can be designed to continuously determine an accumulated quantity V of thawed reducing agent in the container based on the determined temperature difference T3–T2 of the reducing agent and the time elapsed for heat transfer.
[0092] The first control device 200 can be designed to continuously determine an accumulated quantity V of thawed reducing agent in the container based on the determined temperature difference T2-Tred of the reducing agent and the time elapsed for heat transfer.
[0093] The accumulated amount of thawed reducing agent V in the container 205 This can be modeled / calculated / estimated in a suitable way.
[0094] In the container 205 is a level sensor 245 arranged. The level sensor 245is designed to connect to the first control device via a connection L245 200 communicates. The level sensor 245 is designed to maintain a predominant fill level L of the reducing agent in the container 205 The level sensor measures continuously or periodically. It is designed to send signals to the first control device continuously or periodically via connection L245. 200 The sensor transmits information about the determined prevailing fill level L of the reducing agent. 245 It could be a float. The level sensor 245 The level sensor can include a suitable electronic, optoelectronic, or electromechanical sensor. 245 It could, for example, include a laser sensor or a UV sensor.
[0095] The first control device 200is designed in such a way that it eliminates the need to heat a reducing agent in the container 205 The exhaust gas purification is determined via a heating medium that circulates through the container. The first control device 200 is designed to initiate the operation of the SCR system according to the present invention when it has been determined that there is a need to heat (thaw) the reducing agent in the container.
[0096] The first control device 200 is designed to regulate the temperature of the reducing agent in the container 205 continuously determined. This can be done using the first temperature sensor. 221 be carried out. The first control device 200 is designed to maintain a fill level L of the reducing agent in the container 205 This can be determined via the fill level sensor. 245 to be carried out. The first control device 200is designed to hold an accumulated amount V of thawed reducing agent in the container 205 continuously determined / calculated / modeled / estimated.
[0097] The first control device 200 is designed to determine that starting the circulation of the reducing agent is appropriate when the determined temperature Tred of the reducing agent in the container 205 a predetermined first temperature value Th1 is exceeded, and / or if the determined accumulated quantity V of thawed reducing agent exceeds a predetermined first quantity value VTh1.
[0098] The first control device 200 is designed to determine that starting the dosage of the reducing agent is appropriate when the determined temperature Tred of the thawed reducing agent in the container 205a predetermined second temperature value Th2 is exceeded, and / or if the determined accumulated quantity V of thawed reducing agent exceeds a predetermined second quantity value VTh2.
[0099] The first control device 200 is designed to take into account the fill level L of the reducing agent in the container when determining the suitability of starting up, which relates to circulation and dosing.
[0100] The first control device 200The system can be designed to determine the first temperature value Th1, the second temperature value Th2, the first quantity value VTh1, and the second quantity value VTh2 based on the determined fill level L. This can include increasing the first predetermined temperature value Th1. For example, the first predetermined temperature value can be increased by 3 or 7 degrees Celsius, such as from -5 degrees Celsius to -2 or +2 degrees Celsius. This can also include increasing the second predetermined temperature value Th2. For example, the second predetermined temperature value Th2 can be increased by 1 or 5 degrees Celsius, such as from -1 degree Celsius to 0 or +4 degrees Celsius. Similarly, the first quantity value VTh1 and the second quantity value VTh2 can be increased to suitable quantity values.
[0101] The first control device 200It can be designed to add additional heating time after the start-up point has been reached to compensate for a reduced fill level L compared to a possible maximum fill level of the reducing agent in the container. In this case, the first preset temperature value Th1 and the second preset temperature value Th2 are not adjusted. Instead, the start of the reducing agent circulation and / or the start of the reducing agent dosing is controlled such that the respective start is delayed by a suitable period after the first preset temperature value Th1 and the second preset temperature value Th2 have been reached by the thawed reducing agent in the container. 205 were achieved.
[0102] Here, the first predefined quantity value VTh1 and the second predefined quantity value VTh2 are not adjusted. Instead, the start of the reducing agent circulation and / or the start of the reducing agent dosing is controlled such that the respective start is delayed by a suitable period of time after the first predefined quantity value VTh1 and the second predefined quantity value Th2 have been reached by the thawed reducing agent in the container. 205 were achieved.
[0103] The respective time periods are suitable. These periods can be 2, 5, or 10 minutes. The time periods can differ from one another. According to one embodiment, the delay for starting the dosing of reducing agent is significantly longer than the delay for starting the circulation of the reducing agent. According to one embodiment, the delay for starting the dosing of reducing agent is 5 minutes, and the delay for starting the circulation of the reducing agent is zero (0). According to another embodiment, the delay for starting the dosing of reducing agent is 10 minutes, and the delay for starting the circulation of the reducing agent is 2 minutes.
[0104] The first control device 200can be designed to increase the first temperature value Th1, the second temperature value Th2, the first quantity value VTh1 and the second quantity value Vth2 in order to achieve a reduced fill level L compared to a possible maximum fill level of the reducing agent in the container 205 to compensate.
[0105] The first control device 200 can be designed to measure the fill level L of the reducing agent in the container 205 Determining the suitability of starting up is only relevant in relation to the dosage. Consequently, there is no delay in starting the circulation of reducing agent due to the fill level L.
[0106] The first control device 200It is designed to compensate for a reduced fill level L compared to a possible maximum fill level, so the warm-up time before each start-up is longer the more the fill level is reduced. This can also result in changes to the first temperature value Th1, the second temperature value Th2, the first quantity value VTh1, and the second quantity value VTh2 being greater the more the fill level L is reduced compared to a possible maximum fill level.
[0107] The first control device 200The system is designed to activate the start of the circulation or dosing process when it has been determined that starting up is advisable. Activating the start of the circulation and dosing process can be considered advisable when at least one of the following values has been reached: the first temperature value Th1, the second temperature value Th2, the first quantity value Vth1, and the second quantity value Vth2. This requires that at least one value and / or measurement has been corrected due to the reduced fill level L compared to a possible maximum fill level.
[0108] Fig. Figure 4a schematically represents a flowchart of a process for an SCR system that includes a pump 230 and a dosing unit 250 The procedure includes a first procedural step of process s401. Step s401 comprises the following steps: – Determining the need to heat a reducing agent for exhaust gas purification that is contained in a container 205 is located; – after determining the need for heating, continuous heating of the reducing agent by means of a heating medium that passes through the container ( 205 ) circulates; – continuous determination of the temperature of the reducing agent in the container 205 ; – Determining the fill level L of the reducing agent in the container 205 ; – continuous determination of an accumulated quantity V of thawed reducing agent; – Determine that starting the circulation of the reducing agent is appropriate when the determined temperature Tred of the reducing agent in the container 205a predetermined first temperature value Th1 is exceeded, and / or if the determined accumulated quantity V of thawed reducing agent exceeds a predetermined first quantity value VTh1; and / or – Determine that starting the dosage of the reducing agent is appropriate when the determined temperature Tred of the reducing agent in the container 205 a predetermined second temperature value Th2 is exceeded, and / or if the determined accumulated quantity V of thawed reducing agent exceeds a predetermined second quantity value VTh2; wherein the fill level L of the reducing agent in the container 205 in s440 when determining the suitability of starting up, which relates to the circulation and / or the dosing.
[0109] The procedure is completed after process step s401.
[0110] Fig. Figure 4b schematically represents a flowchart of a process for an SCR system that includes a pump 230 and a dosing unit 250 This includes the process. The procedure can be activated when there is a need to heat a reducing agent that is in a container. 250 is located, for exhaust gas purification via a heating medium that passes through the container 205 circulates. This can happen when starting the vehicle. 100 This can be done. A need to heat the reducing agent can be determined if the reducing agent in the container 205 at least partially frozen. This can be determined based on information about the prevailing ambient air temperature, the prevailing temperature of the reducing agent, the exposure duration with respect to the ambient air temperature, and the type of reducing agent (freezing point, etc.).
[0111] The procedure comprises a first process step of sequence s410. Process step s410 can be the step of continuously determining a temperature Tred of the reducing agent in the container. 205 This can be determined using the first temperature sensor. 221 This can be carried out. Alternatively, the temperature can be controlled via the first control device. 200 The processes stored therein are estimated / calculated / modeled. After process step s410, a subsequent process step s420 is executed.
[0112] The process step s420 can be the step of determining a fill level L of the reducing agent in the container. 205 This can include the fill level sensor. 245 This can be done. Alternatively, the fill level L can be controlled via the first control device. 200The processes stored therein are estimated / calculated / modeled. After process step s420, a subsequent process step s430 is executed.
[0113] The process step s430 can be the step of continuously determining an accumulated quantity of thawed reducing agent V in the container 205 This can include the first control device. 200 based on information about, for example, the first temperature T2 of the reducing agent before the container, and the second temperature T3 of the reducing agent after the container 205 This can be done via the first control device. 200 based on information about a difference between the first temperature T2 of the reducing agent before the container 205 and the second temperature T3 of the reducing agent behind the container 205This can be done. According to one embodiment, the accumulated quantity of the thawed reducing agent V in the container can be 205 about the first control device 200 The processes stored within it are modeled / calculated / estimated. After process step s430, a subsequent process step s440 is executed.
[0114] The process step s440 may include the step of determining that starting the circulation of the reducing agent is appropriate when the determined temperature Tred of the reducing agent in the container 205 a predetermined first temperature value Th1 is exceeded, and / or if the determined accumulated quantity V of thawed reducing agent exceeds a predetermined first quantity value VTh1.
[0115] The process step s440 may include the step of determining that starting the dosage of the reducing agent is appropriate when the determined temperature Tred of the reducing agent in the container 205 a predetermined second temperature value Th2 is exceeded, and / or if the determined accumulated quantity V of thawed reducing agent exceeds a predetermined second quantity value VTh2; The process step s440 may include the level L of the reducing agent in the container 205 is included in determining the suitability of starting up, which relates to the circulation and / or the dosing.
[0116] After process step s440, a subsequent process step s450 is executed.
[0117] Process step s450 can include the step in which the circulation of reducing agent in the SCR system is started, if necessary. Advantageously, the reducing agent can be heated during this process. Heating can be carried out via at least one of the heating elements. 261 , 262 and 263 Heating can also be achieved, or additionally, via the liquid in the pipe. 281 take place.
[0118] The start time of the cycle is determined here according to the innovative method based on the determined fill level L of the reducing agent in the container. 205 determined. After process step s450, a subsequent process step s460 is executed.
[0119] The process step s460 may include the step in which, if necessary, the dosage of the reducing agent is determined via the dosing unit. 250The system is initiated. It is understood that actual dosing is not strictly necessary here. The actual dosing occurs according to processes defined in the first control device. 200 are stored. It should be noted that the actual dosing after the dosing process has started only takes place if this is appropriate depending on various factors such as the prevailing load and / or exhaust gas temperature of the vehicle engine.
[0120] The timing of the start of the dosing process is determined here according to the innovative method based on the determined fill level L of the reducing agent in the container. 205 determined.
[0121] After process step s460, the process is completed.
[0122] With reference to Fig. 5 is a diagram of an embodiment of a system 500 shown. The control units 200 and 210 , which in relation to Fig. As described in section 2, in one embodiment the system can be 500 include the unit 500 includes non-volatile memory 520 , a data processing unit 510 and a read / write memory 550 The non-volatile memory 520 has a first storage part 530 on, in which a computer program such as an operating system is stored to enable the function of the unit 500 to control. Furthermore, the unit includes 500 A bus controller, a serial communication port, an I / O device, an A / D converter, a date / time input and transmission unit, an event counter, and an interrupt controller (not shown). The non-volatile memory 520 also has a second storage section 540 on.
[0123] A computer program P is provided, which includes processes to operate an SCR system that uses a pump. 230and a dosing unit 250 includes: – to determine the necessity of heating a reducing agent for exhaust gas purification that is contained in a container 205 is located; – after determining the need for heating, the reducing agent is heated by means of a heating medium passing through the container ( 205 ) circulates, continuously heating; – continuously a temperature trend of the reducing agent in the container 205 to determine; and – a fill level L of the reducing agent in the container 205 to determine.
[0124] The computer program P can include procedures to continuously determine an accumulated quantity of thawed reducing agent. The computer program P can include procedures to determine that starting the recirculation of the reducing agent is appropriate when the determined temperature Tred of the reducing agent in the container is reached. 205The computer program P may include sequences to determine that starting the dosing of the reducing agent is appropriate when the determined temperature Tred of the reducing agent in the container exceeds a predetermined initial temperature value Th1, and / or when the determined accumulated quantity V of thawed reducing agent exceeds a predetermined initial quantity value VTh1. 205 The computer program P can include processes to determine the fill level L of the reducing agent in the container. This occurs when a predefined second temperature value Th2 is exceeded, and / or when the determined accumulated quantity V of thawed reducing agent exceeds a predefined second quantity value VTh2. 205 to be included when determining the appropriateness of the start-up, which relates to the circulation and / or the dosing.
[0125] The computer program P can include processes to determine the first temperature value Th1, the second temperature value Th2, the first quantity value VTh1 and the second quantity value VTh2 based on the determined fill level L.
[0126] The computer program P may include procedures to add additional heating time after the suitability of start-up has been achieved, in order to achieve a reduced fill level L compared to a possible maximum fill level of the reducing agent in the container. 205 to compensate.
[0127] The computer program P can include processes to increase the first temperature value Th1, the second temperature value Th2, the first quantity value VTh1 and the second quantity value Vth2 in order to achieve a reduced fill level L compared to a possible maximum fill level of the reducing agent in the container. 205 to compensate.
[0128] The computer program P can include processes to monitor the fill level of the reducing agent in the container. 205 to be included when determining the appropriateness of starting up, which relates only to the dosage.
[0129] The computer program P can include processes to compensate for a reduced fill level L compared to a possible maximum fill level, so that the warm-up time before each start-up is longer the more the fill level is reduced.
[0130] The computer program P can include processes to activate the start-up of the circulation and dosing when it has been determined that a start-up is appropriate.
[0131] The program P can be executed in executable form or compressed in memory. 560 and / or a read / write memory 550 be saved.
[0132] A statement that the data processing unit 510performing a specific function means that the data processing unit 510 executes a specific part of the program that is in memory 560 is stored, or a specific part of the program that is in read / write memory 550 is stored.
[0133] The data processing unit 510 can be accessed via a data bus 515 with a data port 599 communicate. The non-volatile memory 520 is for communication with the data processing unit 510 via a data bus 512 determined. The separate storage 560 is for communication with the data processing unit 510 via a data bus 511 Definitely. The read / write memory. 550 is for communication with the data processing unit 510 via a data bus 514The connections L210, L221, L222, L223, L230, L245 can, for example, be connected to the data port. 599 be connected (see Fig. 2 and Fig. 3).
[0134] If data is in the data port 599 received, these are temporarily stored in the second memory part 540 stored. When received input data is temporarily stored, the data processing unit 510 ready to execute code in the manner described above. According to one embodiment, signals in the data port include 599 Information about the prevailing temperature of the reducing agent in the container will be received. 205 According to one embodiment, signals that are in the data port include 599 Information about the prevailing temperature T2 of the heating medium in front of the container will be received. 205 According to one embodiment, signals that are in the data port include 599Information about the prevailing temperature T3 of the heating medium behind the container will be received. 205 .
[0135] Parts of the procedure described herein may be performed by the unit 500 with the help of the data processing unit 510 to be carried out, which is stored in memory 560 or in read / write memory 550 executes a saved program. When the unit 500 When the program is executed, the processes described herein will be carried out.
[0136] The foregoing description of preferred embodiments of the present invention has been provided for illustrative and descriptive purposes. It is not intended to be exhaustive or to limit the invention to the described modifications. Many modifications and variations are apparent to the person skilled in the art. The embodiments have been chosen and described to best explain the principles of the invention and its practical applications, and to enable the person skilled in the art to understand the invention in relation to its different embodiments and with the various modifications applicable to the intended use.
Claims
[1] Method for an SCR system that includes a pump ( 230 ) and a dosing unit ( 250 ) includes the following steps: – Determining (s410) the need to heat a reducing agent for exhaust gas purification contained in a container ( 205 ) is located; – after determining the need for heating, continuous heating of the reducing agent by means of a heating medium that passes through the container ( 205 ) circulates; – continuous determination (s420) of a temperature (Tred) of the reducing agent in the container ( 205 ); – Determining the fill level (L) of the reducing agent in the container ( 205 ), characterized by the following steps: – continuous determination (s430) of an accumulated quantity (V) of thawed reducing agent; – Determine (s440) that starting the circulation of the reducing agent is appropriate when the determined temperature (Tred) of the reducing agent in the container ( 205 ) exceeds a predetermined first temperature value (Th1), and / or if the determined accumulated quantity (V) of thawed reducing agent exceeds a predetermined first quantity value (VTh1); and / or – Determine (s440) that it is appropriate to start dosing the reducing agent when the determined temperature (Tred) of the reducing agent in the container exceeds a predetermined second temperature value (Th2) and / or when the determined accumulated quantity (V) of thawed reducing agent exceeds a predetermined second quantity value (VTh2); wherein the determined fill level (L) of the reducing agent in the container ( 205) is taken into account when determining the suitability of starting the circulation and / or the metering (s440), and wherein the first temperature value (Th1), the second temperature value (Th2), the first quantity value (VTh1) and the second quantity value (VTh2) are determined on the basis of the determined fill level (L). [2] The method of claim 1, which also includes the following step: – Adding additional heating time after the suitability of start-up has been achieved to ensure a reduced fill level (L) compared to a possible maximum fill level of the reducing agent in the container ( 205 to compensate. [3] Method according to claim 1 or 2, which also includes the following step: – Increasing the first temperature value (T1), the second temperature value (T2), the first quantity value (V1) and the second quantity value (V2) to achieve a reduced fill level (L) compared to a possible maximum fill level of the reducing agent in the container ( 205 to compensate. [4] A method according to any one of claims 1–3, further comprising the following step: – Including the fill level (L) of the reducing agent in the container ( 205 ) when determining the appropriateness of starting up, which relates only to the dosage. [5] A method according to any one of claims 1–4, further comprising the following step: – Compensating for a reduced fill level (L) compared to a possible maximum value, so that the warm-up time before each start-up is longer the more the fill level is reduced. [6] A method according to any one of claims 1–5, further comprising the following step: – Activating the start-up of the circulation and dosing when it has been determined that starting up is appropriate. [7] SCR system which includes a pump ( 230 ) and a dosing unit ( 250 ) includes the following: – Elements ( 200 ; 210 ; 500 ), which are designed to determine the need to heat a reducing agent for exhaust gas purification that is contained in a container ( 205 ) is located; – Elements ( 200 ; 210 ; 500 ; 230 ; 281 ), which are designed to mix the reducing agent with a heating medium that passes through the container ( 205 ) circulates, continuously reheating when a need for reheating is identified; – Elements ( 200 ; 210 ; 500 ; 221), which are designed to maintain a temperature (Tred) of the reducing agent in the container ( 205 ) continuously determine; – Elements ( 200 ; 210 ; 500 ; 245 ), which are designed to maintain a fill level (L) of the reducing agent in the container 205 determine; characterized by: – Elements ( 200 ; 210 ; 500 ), which are designed to continuously detect an accumulated quantity (V) of thawed reducing agent; – Elements ( 200 ; 210 ; 500 ), which are designed to determine whether starting the circulation of the reducing agent is appropriate when the determined temperature (Tred) of the reducing agent in the container ( 205) exceeds a predetermined first temperature value (Th1), and / or if the determined accumulated quantity (V) of thawed reducing agent exceeds a predetermined first quantity value (VTh1); and / or – Elements ( 200 ; 210 ; 500 ), which are designed to determine whether it is appropriate to start dosing the reducing agent when the determined temperature (Tred) of the reducing agent in the container ( 205 ) exceeds a predetermined second temperature value (Th2), and / or if the determined accumulated quantity (V) of thawed reducing agent exceeds a predetermined second quantity value (VTh2); and – Elements ( 200 ; 210 ; 500 ), which are designed to determine the measured fill level (L) of the reducing agent in the container ( 205) to be included when determining the appropriateness of starting the cycle and / or the dosing, whereby the elements ( 200 , 210 , 500 ) are designed to determine the first temperature value (Th1), the second temperature value (Th2), the first quantity value (VTh1) and the second quantity value (VTh2) based on the determined fill level (L). [8] SCR system according to claim 7, comprising the following: – Elements ( 200 ; 210 ; 500 ), which are designed to add additional heating time after the expediency of start-up has been achieved, in order to achieve a reduced fill level (L) compared to a possible maximum fill level of the reducing agent in the container ( 205 to compensate. [9] SCR system according to claim 7 or 8, comprising: – Elements ( 200 ; 210 ; 500), which are designed to increase the first temperature value (T1), the second temperature value (Th2), the first quantity value (VTh1) and the second quantity value (VTh2) in order to achieve a reduced fill level (L) compared to a possible maximum fill level of the reducing agent in the container ( 205 to compensate. [10] SCR system according to any one of claims 7–9, comprising the following: – Elements ( 200 ; 210 ; 500 ), which are designed to measure the fill level (L) of the reducing agent in the container ( 205 ) when determining the appropriateness of starting up, which relates only to the dosage. [11] SCR system according to any one of claims 7–10, comprising: – Elements ( 200 ; 210 ; 500), which are designed to compensate for a reduced fill level (L) compared to a possible maximum fill level, so that the warm-up time before each start-up is longer the more the fill level (L) is reduced. [12] SCR system according to any one of claims 7–11, comprising: – Elements ( 200 ; 210 ; 500 ), which are designed to activate the start-up of the circulation and dosing when it has been determined that a start-up is appropriate. [13] motor vehicle ( 100 ; 110 ) according to one of claims 7–12, comprising an SCR system. [14] motor vehicle ( 100 , 110 ) according to claim 13, wherein the motor vehicle is a truck, a bus or a passenger car. [15] Computer program (P) in an SCR system, wherein the computer program (P) comprises program code that causes an electronic control device (200 ; 500 ) or another computer ( 210 ; 500 ), which is connected to the electronic control device ( 200 ; 500 ) is connected, performing the steps according to one of claims 1–6. [16] Computer program product comprising program code stored in a computer-readable medium for carrying out the method steps according to any one of claims 1–6, wherein the program code is stored in an electronic control device ( 200 ; 500 ) or in a computer ( 210 ; 500 ) is executed, which is connected to the electronic control device ( 200 ; 500 ) is connected.