EP4352342A1 - Verfahren zum betreiben einer antriebseinrichtung für ein kraftfahrzeug sowie entsprechende antriebseinrichtung - Google Patents
Verfahren zum betreiben einer antriebseinrichtung für ein kraftfahrzeug sowie entsprechende antriebseinrichtungInfo
- Publication number
- EP4352342A1 EP4352342A1 EP22728879.2A EP22728879A EP4352342A1 EP 4352342 A1 EP4352342 A1 EP 4352342A1 EP 22728879 A EP22728879 A EP 22728879A EP 4352342 A1 EP4352342 A1 EP 4352342A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- connections
- supply
- heating device
- control unit
- voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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
- 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
- F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
- F01N3/2013—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using electric or magnetic heating means
-
- 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
-
- 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
- F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
- F01N2240/16—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being an electric heater, i.e. a resistance heater
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
- F01N2550/00—Monitoring or diagnosing the deterioration of exhaust systems
- F01N2550/22—Monitoring or diagnosing the deterioration of exhaust systems of electric heaters for exhaust systems or their power supply
-
- 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
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/12—Other sensor principles, e.g. using electro conductivity of substrate or radio frequency
-
- 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
- F01N2900/0602—Electrical exhaust heater signals
-
- 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
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
- F01N3/027—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using electric or magnetic heating means
Definitions
- the invention relates to a method for operating a drive device for a motor vehicle, which has a drive unit that generates exhaust gas, an exhaust gas aftertreatment device and a heating device for heating the exhaust gas aftertreatment device, with electrical connections of the heating device being electrically connected to a control unit via electrical supply connections.
- the invention further relates to a drive device for a motor vehicle.
- the publication DE 4336091 B4 is known from the prior art.
- This describes a device for monitoring a heating element in a catalytic converter of a motor vehicle, the heating element having a first and a second electrical connection, and when an electrical voltage is applied to the two connections of the heating element, an electrical current flows through the heating element Heating element heats up. It is provided that there is a center tap between the first and the second connection of the heating element, and that the voltage present at the center tap is used to assess whether the heating element is working properly.
- the object of the invention is to propose a method for operating a drive unit for a motor vehicle which has advantages over known methods, in particular enabling a more precise diagnosis of the heating device and its electrical connection to the control unit.
- a voltage applied to the heating device is measured by the control unit by means of measuring lines that are separate from the supply connections and are electrically connected to the control unit on the one hand and to the connections on the other Error in the supply connections is detected.
- the method serves to operate the drive device.
- the drive unit in turn, is provided and designed for driving the motor vehicle, insofar as it is intended for providing a drive torque aimed at driving the motor vehicle.
- the drive unit has the drive unit, which generates exhaust gas at least temporarily during its operation.
- the drive unit is preferably in the form of an internal combustion engine.
- the exhaust gas generated by the drive unit is discharged by the latter, namely in the direction of an area outside the drive device. Since the exhaust gas contains pollutants which should not or at least not completely be released into the outside environment, the exhaust gas is fed to the exhaust gas aftertreatment device before it is released. This applies before given to the entire exhaust gas generated by the drive unit.
- the exhaust gas aftertreatment device is designed in such a way that it at least temporarily and at least partially converts the pollutants into less hazardous products, in particular catalytically. After passing through the exhaust aftertreatment device, the exhaust gas is discharged to the outside environment.
- the exhaust gas aftertreatment device is preferably present as a vehicle catalytic converter, ie for example as a three-way catalytic converter, as an oxidation catalytic converter, as a storage catalytic converter or NOx storage catalytic converter or as an SCR catalytic converter.
- the exhaust gas aftertreatment device has a conversion rate for the pollutants that depends on its temperature.
- An operating temperature is therefore defined for the exhaust aftertreatment device at which it has a particularly high level of effectiveness. This means that it has a particularly high conversion rate for one or more pollutants at the operating temperature for the respective pollutant.
- the operating temperature is higher than an ambient temperature that is present under normal ambient conditions of the motor vehicle. At the start of operation of the drive device, the temperature of the exhaust gas aftertreatment device is therefore lower than its operating temperature.
- the exhaust gas aftertreatment device In order to reduce the amount of pollutants that get through the exhaust gas aftertreatment device, provision is therefore made to heat the exhaust gas aftertreatment device by means of the heating device. With the help of the heating device, the exhaust gas aftertreatment device is thus supplied with heat, which is aimed at increasing the temperature of the exhaust gas aftertreatment device in the direction of or towards the operating temperature.
- the heating device supplies the heat to the exhaust aftertreatment device directly, for example, and is thermally conductive for this purpose. wisely connected to them in a heat-transferring manner.
- the heating device is arranged in the exhaust gas aftertreatment device or encompasses it.
- the heating device supplies the heat to the exhaust gas aftertreatment device only indirectly, namely via the exhaust gas.
- the exhaust gas is heated at least temporarily upstream of the exhaust gas aftertreatment device by means of the heating device.
- the heated exhaust gas then flows through the exhaust gas aftertreatment device, so that it is heated up more quickly than without the operation of the heating device.
- the heating device is in the form of an electrical heating device. It has electrical connections via which it is electrically connected to the control unit. The connections of the heating device are electrically connected to the control unit via the supply connections.
- the supply connections preferably include at least electrical supply lines and—optionally—additional connections of the lines, via which these are electrically connected to the control device on the one hand and to the heating device on the other hand.
- the supply lines and their connections to the control device and the heating device each have an electrical resistance that can be described by an equivalent resistance.
- the control unit measures the electrical voltage present at the supply connections and/or a current intensity of the to measure electrical current flowing through the supply connections. If the voltage and/or the amperage deviates from a respective specified value, a fault in the heating device and the supply connections can be detected.
- tolerances must be chosen to be quite large when monitoring. Thus, the error can only be detected if there is a significant deviation of the voltage or the current intensity from the selected default value.
- the error is in the supply connections and not in the heating device itself, thermal overloading of the supply connections can already occur due to the inaccuracy of the monitoring, which in turn can lead to damage to the drive device.
- the voltage present at the supply connections is not or at least not only measured by and by means of the control unit, but rather the voltage present at the heating device.
- the control unit is electrically connected to the heating device via measuring lines that are separate from the supply connections.
- the measuring lines are therefore electrically connected separately from the supply connections to the control device on the one hand and to the heating device on the other hand. This implements a four-wire connection of the heating device to the control unit and the voltage present at the heating device is measured using a four-wire measurement.
- This procedure prevents a line resistance of the supply lines and/or a connection resistance of the electrical connection of the supply lines to the control unit and/or the heating device from influencing the measurement of the voltage applied to the heating device. Rather, the voltage is determined extremely precisely and can be compared with the default value to this extent with small tolerances. If the measured voltage deviates from a specified value, a fault in the supply connections is detected. Otherwise, i.e. if the measured voltage corresponds to the default value, a functioning kidney of the supply connections is detected. When comparing the measured voltage with the default value, a tolerance can be taken into account, which is chosen arbitrarily.
- the procedure described enables dedicated diagnosis of the supply connections and thus extremely precise error detection. Provision is particularly preferably made to diagnose the heating device in the manner described above and also to diagnose the supply connections with the aid of the procedure outlined. This ensures a high level of operational reliability of the drive device.
- a development of the invention provides that the voltage is measured by means of the measuring lines, which are connected to the electrical connections at a distance from supply connections.
- there is no provision for connecting the measuring lines and the supply connections together to the electrical connections since in this case only the voltage between the supply connections and not between the electrical connections would be measured.
- the voltage applied to the heating device and thus the voltage present between the electrical connections of the heating device be measured using the separate measuring lines. As a result, the measurement accuracy described is achieved without the influence of the electrical power transmitted via the supply connections.
- a development of the invention provides that the voltage used is a differential voltage between a supply voltage applied by the control device to the supply connections and a test voltage measured by the control device on the measuring lines.
- the supply connections are electrically connected on the one hand to electrical connections of the control unit and on the other hand to the electrical connections of the heating device.
- the voltage present at the connections of the control unit is referred to as the supply voltage. It is applied to the supply connections via the control unit connections.
- the test voltage is the voltage measured on the measuring lines.
- Both the supply voltage and the test voltage are available from the control unit. Instead of measuring the supply voltage and the test voltage separately, it is planned to measure only the differential voltage between the supply connections and the measuring lines on the part of the control unit between the named voltages and to use it as the measured voltage, i.e. to compare it with the specified value . This simplifies an electronic circuit of the control device that is used to measure the voltage. In addition, the default value does not have to be specified in absolute terms, but describes the test voltage relative to the supply voltage.
- a further development of the invention provides that the voltage is measured while the heating device is being switched on, in particular only while it is being switched on.
- the electrical power supplied to the heating device by the control unit is smaller than when the heating device is switched on, in particular it is equal to zero.
- the control unit supplies the heating device via the supply connections with electrical power that is sufficient for heating the exhaust gas aftertreatment device.
- the change from the off state of the heater to its on state is referred to as turn on.
- the lower electrical power is present immediately before the heating device is switched on, and the higher electrical power is present immediately after it is switched on.
- the voltage is measured while it is being switched on, i.e. while the power is being increased starting from the lower power in the direction of the higher power or after the higher power has been reached, in particular immediately afterwards He- range of higher performance.
- the voltage is only measured when it is switched on, so that it is only checked whether the heating device is working correctly at the beginning of its operation.
- provision can also be made for the voltage to be measured periodically after switching on, in particular at specific, for example regular, intervals.
- a particularly reliable operation of the drive device is realised.
- a further development of the invention provides that when the heating device is switched on, at least one electrical variable of the supply connections is measured by the control unit and a fault in the heating device is detected if the variable deviates from a further default value. It is therefore not only the voltage applied to the heating device that is measured by means of the measuring lines, but the control unit also determines the at least one electrical variable of the supply connections. If this variable or its measured value deviates from the additional default value, the error in the heating device is identified. It is thus possible to diagnose the state of the supply connections by measuring the voltage using the measuring lines and also to infer the state of the heating device by measuring the electrical variable. In this way, a comprehensive diagnosis of the heating device and its electrical connection to the control unit is implemented.
- a further development of the invention provides that the supply voltage applied by the control unit to the supply connections and/or a current strength of the electrical current flowing via the supply connections is used as the electrical variable.
- a voltage, a current intensity or both can be used as the variable referred to above.
- the supply voltage that is applied to the supply connections by the control unit is used as the voltage.
- the amperage is that of the electric current running through the supply connections. The procedure described enables a simple diagnosis of the heating device itself.
- the invention also relates to a drive device for a motor vehicle, in particular for carrying out the method according to the statements in this description, with a drive unit that generates exhaust gas, an exhaust gas aftertreatment device and a heating device for heating the exhaust gas aftertreatment device, with electrical connections to the heating device via electrical supply connections a control unit are electrically connected.
- the drive unit is provided and designed to measure a voltage present on the heating device using measuring lines that are separate from the supply connections and are electrically connected to the control unit on the one hand and to the connections on the other default value for an error in the supply connections is detected.
- the supply connections include two supply lines and first connections for electrically connecting the supply lines to the control unit and second connections for electrically connecting the supply lines to the connections of the heating device.
- the control device and the heating device are electrically connected to one another via the two supply lines.
- One of the first connections and one of the second connections is electrically connected to each of the supply lines, so that the first connection and the second connection are electrically connected to one another via the respective supply line.
- the first connections of the two supply lines are connected to the connections on the control unit and the second connections of the supply lines are connected to the connections of the heating device.
- the supply connections expressly also include the connection of the supply lines to the connections of the control device and/or the connection of the supply lines to the connections of the heating device. It is important that the supply connections include both the supply lines and the first connections and the second connections, so that not only the supply lines but also their connection to the control device and the heating device can be checked with the aid of the voltage measurement. This enables a comprehensive diagnosis.
- each of the measuring lines is electrically connected to the supply connections only via the respective connection of the heating device.
- the measuring lines are not directly electrically connected to the heating device, but only indirectly to the supply connections or the supply lines, namely via the connections of the heating device.
- the measuring lines and the supply connections are connected to the connections of the heating device independently of one another, namely in such a way that they are only electrically connected to one another via the respective connection. This ensures that the connection of the supply connections to the connections of the heating device can actually be diagnosed using the measuring lines and not just the supply lines themselves.
- a further development of the invention provides that insulating elements are arranged between the measuring connections of the measuring lines and the second connections of the supply lines.
- the only indirect connection of the measuring lines to the supply lines via the connections of the heating device is achieved with the help of the insulating elements.
- one of the insulating elements is present between one of the second connections of the supply lines and a connection of the respective measuring line and electrically insulates them from one another.
- the connections of the heating device are designed as pins, in particular as threaded pins.
- One of the second connections of the supply lines is first attached to each of these threaded pins, then one of the insulating elements and then one of the measuring lines or its connection. This arrangement is fixed, for example, using a nut or the like. This implements a connection of the supply lines to the heating device, which allows a particularly comprehensive diagnosis.
- FIG. 1 shows a schematic representation of a region of a drive unit for a motor vehicle, namely a control unit and a heating device which is electrically connected to the control unit, such as
- FIG. 2 shows a schematic representation of an area of a heating device and a supply connection via which the heating device is electrically connected to the control unit.
- FIG. 1 shows a schematic representation of a region of a drive device 1 for a motor vehicle.
- the drive device 1 has a drive assembly, not shown here, by means of which a drive torque directed to the driving of the motor vehicle can be provided.
- exhaust gas is produced, which is fed to an exhaust gas aftertreatment device 2 .
- a heating device 3 for heating the exhaust gas aftertreatment device 2 .
- Electrical connections 4 and 5 of the heating device 3 are connected via supply connections 6 and 7 to a control unit 8 of the drive device 1, namely to connections 9 and 10 of the control unit 8.
- the supply connections 6 and 7 each have first connections 11 and 12 and second connections 13 and 14.
- the connections 11 and 13 or 12 and 14 are electrically connected to one another via supply lines 15 and 16 of the supply connections 6 and 7 connected.
- equivalent resistances 17, 18, 19, 20, 21 and 22 are shown.
- the equivalent resistors 17 and 20 describe the electrical resistance between the control unit 8 or its terminals 9 and 10 and the supply lines 15 and 16
- the equivalent resistors 18 and 21 describe the electrical resistance of the supply lines 15 and 16 and the equivalent resistors 19 and 22 den electrical resistance of the connection of the supply lines 15 and 16 to the heating device 3 or its connections 4 and 5.
- the drive device 1 has measuring lines 23 and 24 which are electrically connected to the control device 8 on the one hand and to the connections 4 and 5 of the heating device 3 on the other hand.
- the measuring lines 3 and 24 are electrically connected to the control device 8 on the one hand and to the connections 4 and 5 of the heating device 3 on the other hand.
- the voltage applied to the heating device 3 or its terminals 4 and 5 is provided to be measured using the measuring lines 23 and 24. If the measured voltage deviates from a specified value, a fault in the supply connections 6 and 7 is detected. If, on the other hand, the voltage corresponds to the specified value, functioning of the supply connections 6 and 7 is detected.
- FIG. 2 shows a schematic representation of an area of the heating device 3, namely the connection 4, with the connection 5 being configured identically.
- the connection 4 is in the form of a pin or a bolt, in particular a threaded bolt, to which the connection 13 of the supply connection 6 is initially connected.
- the measuring line 23 or a contact thereof is also connected to the connection 4, in particular plugged onto it.
- the connection 13 and the measuring line 23 are held on the connection 4 by means of a screw nut 25 which is screwed to the connection 4 .
- an insulating element 26 is arranged between the connection 13 and the measuring line 23 .
- This causes an electrical insulation of the connection 13 and the measuring line 23 from one another, so that the connection 13 and the measuring line 23 are electrically connected to one another only indirectly via the connection 4, but not directly.
- the four-wire measurement already mentioned is implemented, as a result of which a particularly precise diagnosis of the heating device 3 and the supply connections 6 and 7 is possible.
- the supply line 15 has an insulation 27, from which it - as shown - protrudes single Lich end.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021114496.5A DE102021114496B4 (de) | 2021-06-07 | 2021-06-07 | Verfahren zum Betreiben einer Antriebseinrichtung für ein Kraftfahrzeug sowie entsprechende Antriebseinrichtung |
| PCT/EP2022/062963 WO2022258304A1 (de) | 2021-06-07 | 2022-05-12 | Verfahren zum betreiben einer antriebseinrichtung für ein kraftfahrzeug sowie entsprechende antriebseinrichtung |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP4352342A1 true EP4352342A1 (de) | 2024-04-17 |
| EP4352342B1 EP4352342B1 (de) | 2025-01-29 |
Family
ID=81984831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22728879.2A Active EP4352342B1 (de) | 2021-06-07 | 2022-05-12 | Verfahren zum betreiben einer antriebseinrichtung für ein kraftfahrzeug sowie entsprechende antriebseinrichtung |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4352342B1 (de) |
| CN (1) | CN117501001A (de) |
| DE (1) | DE102021114496B4 (de) |
| WO (1) | WO2022258304A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102022206580A1 (de) * | 2022-06-29 | 2024-01-04 | Vitesco Technologies GmbH | Verfahren zum Betreiben eines elektrisch beheizbaren Katalysators und elektrisch beheizbarer Katalysator |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4336091B4 (de) | 1993-10-22 | 2005-03-17 | Robert Bosch Gmbh | Vorrichtung zur Überwachung eines elektrischen Heizelementes in einem Katalysator eines Kraftfahrzeugs und Verfahren, bei dem die Vorrichtung eingesetzt wird |
| JP3553146B2 (ja) * | 1994-08-22 | 2004-08-11 | 本田技研工業株式会社 | 電気加熱式触媒制御装置 |
| JP3498817B2 (ja) * | 1995-06-14 | 2004-02-23 | 株式会社デンソー | 内燃機関の排気系故障診断装置 |
| JP3602614B2 (ja) * | 1995-07-04 | 2004-12-15 | 本田技研工業株式会社 | 内燃機関の排気ガス浄化装置 |
| DE19645016C1 (de) * | 1996-10-31 | 1998-06-18 | Siemens Ag | Verfahren zum elektrischen Beheizen eines Katalysators |
| DE102011104193A1 (de) * | 2011-06-15 | 2012-12-20 | Emitec Gesellschaft Für Emissionstechnologie Mbh | Vorrichtung mit einem elektrisch beheizbaren Wabenkörper und Verfahren zum Betreiben des Wabenkörpers |
| DE102012007053B4 (de) * | 2012-04-05 | 2021-02-18 | Audi Ag | Verfahren zum Betreiben einer Brennkraftmaschine sowie Brennkraftmaschine |
| GB2512040A (en) | 2012-12-31 | 2014-09-24 | Continental Automotive Systems | Using resistance equivalent to estimate heater temperature of an exhaust gas after-treatment component |
| DE102019204992A1 (de) | 2019-04-08 | 2020-10-08 | Vitesco Technologies GmbH | Verfahren und Vorrichtung zum Überprüfen und Sicherstellen einer Funktionsfähigkeit eines Abgasnachbehandlungssystems einer Brennkraftmaschine |
-
2021
- 2021-06-07 DE DE102021114496.5A patent/DE102021114496B4/de active Active
-
2022
- 2022-05-12 CN CN202280040566.XA patent/CN117501001A/zh active Pending
- 2022-05-12 EP EP22728879.2A patent/EP4352342B1/de active Active
- 2022-05-12 WO PCT/EP2022/062963 patent/WO2022258304A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| DE102021114496A1 (de) | 2022-12-08 |
| EP4352342B1 (de) | 2025-01-29 |
| WO2022258304A1 (de) | 2022-12-15 |
| CN117501001A (zh) | 2024-02-02 |
| DE102021114496B4 (de) | 2023-10-26 |
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