EP1640588A2 - Méthode pour le fonctionnement d'un moteur à combustion interne et capteur pour détecter au moins une valeur caractéristique dans les gaz d'échappement du moteur à combustion interne - Google Patents

Méthode pour le fonctionnement d'un moteur à combustion interne et capteur pour détecter au moins une valeur caractéristique dans les gaz d'échappement du moteur à combustion interne Download PDF

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Publication number
EP1640588A2
EP1640588A2 EP05106590A EP05106590A EP1640588A2 EP 1640588 A2 EP1640588 A2 EP 1640588A2 EP 05106590 A EP05106590 A EP 05106590A EP 05106590 A EP05106590 A EP 05106590A EP 1640588 A2 EP1640588 A2 EP 1640588A2
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EP
European Patent Office
Prior art keywords
sensor
exhaust gas
signal
temperature
filter device
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP05106590A
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German (de)
English (en)
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EP1640588A3 (fr
Inventor
Sabine Rösch
Katharina Schaenzlin
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Robert Bosch GmbH
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Robert Bosch GmbH
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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1640588A2 publication Critical patent/EP1640588A2/fr
Publication of EP1640588A3 publication Critical patent/EP1640588A3/fr
Withdrawn legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
    • F02D41/146—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an NOx content or concentration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/021—Introducing corrections for particular conditions exterior to the engine
    • F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
    • F02D41/027—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus
    • F02D41/029—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus the exhaust gas treating apparatus being a particulate filter
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/08—Exhaust gas treatment apparatus parameters
    • F02D2200/0812—Particle filter loading
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1439—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the position of the sensor
    • F02D41/1441—Plural sensors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
    • F02D41/1446—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being exhaust temperatures

Definitions

  • the invention initially relates to a method for operating an internal combustion engine, in which particles present in the exhaust gas are retained in a filter device and detected on the basis of a first signal of a sensor device.
  • the invention further relates to a computer program, an electrical storage medium for a control and / or regulating device of an internal combustion engine, a control and / or regulating device for an internal combustion engine, and a sensor device for detecting at least one state variable in the exhaust gas of an internal combustion engine, with at least one first sensor for detecting particles present in the exhaust gas.
  • diesel internal combustion engines which include an exhaust system with a particulate filter that filters soot particles from the exhaust.
  • the filtered-out particles deposit on the filter, which causes the flow resistance of the exhaust gas through the exhaust line to increase over time.
  • exhaust back pressure can lead to increased fuel consumption or a reduction in performance of the internal combustion engine.
  • particle sensor devices To detect the loading state of the particulate filter with soot particles and to be able to initiate a regeneration of the particulate filter in time, particle sensor devices are used.
  • a particle sensor device is described for example in DE 101 33 384 A1. It has a collecting chamber, which is fluidically connected to the exhaust gas flow of the internal combustion engine. On one side of the collection chamber, two electrodes are arranged, which mesh in a comb-like manner ("interdigital"). During operation of the known particle sensor device, soot particles enter the collection chamber and deposit on the electrodes.
  • the gap between the two electrodes is electrically bridged, so that the impedance of the electrode structure changes.
  • the temporal change of the impedance is a measure of the loading of the exhaust gas flow with soot particles.
  • it has a heating device, by means of which the soot particles accumulated during operation can be burnt.
  • Another sensor device is known from DE 101 49 333 A1.
  • a resistance measuring structure consisting of interdigital comb electrodes is applied to an electrical insulating support.
  • soot particles By addition of soot particles, the electrical resistance of the resistive layer changes.
  • Object of the present invention is to increase the safety in the operation of the internal combustion engine, while low manufacturing and operating costs.
  • This object is achieved in a method of the type mentioned in that the same sensor device provides a second signal which is at least temporarily used to determine the exhaust gas temperature.
  • a sensor device of the type mentioned has at least one second sensor for detecting the exhaust gas temperature.
  • the exhaust gas temperature is an important parameter for the control and regulation of an internal combustion engine. Their knowledge enables a low-emission and consumption-optimal operation.
  • a first preferred embodiment of the method according to the invention is characterized in that the second signal is not used during a regeneration phase of the sensor device for determining the exhaust gas temperature.
  • a regeneration phase of the sensor device is usually accompanied by a heating of the sensor device by means of a built-in heating device. This warming naturally also influences the second signal.
  • the inventive measure prevents an exhaust gas temperature is determined which does not correspond to the actual exhaust gas temperature. In this way, the operational reliability of the internal combustion engine, including an associated exhaust aftertreatment system, is improved.
  • the sensor device is arranged downstream of the filter device and the second signal is used to monitor and / or control or regulate a regeneration of the filter device.
  • a regeneration of the filter device is usually associated with a heating of the filter device to a temperature at which the deposited soot particles burn off due to an exothermic reaction.
  • the heating of the filter device required for the initiation of the exothermic reaction can be effected by increasing the exhaust gas temperature, or it can be brought about by a separate heating device. By this heating and the exothermic reaction, the temperature of the exhaust gas downstream of the filter device will be increased accordingly. This can be detected by the sensor device arranged according to the invention, which improves the reliability and quality of the regeneration of the filter device.
  • the analysis of the temperature history of the particulate filter also makes it possible to detect possible damage to the same.
  • a detected damage of the filter device to adapt a signal of a differential pressure sensor which detects the pressure difference across the filter device.
  • a differential pressure sensor is usually present to also provide a signal by which the loading of the filter device can be determined with particles.
  • the interpretation of the signal of the differential pressure sensor is based on a correctly operating filter device.
  • the differential pressure sensor possibly supplies a signal which corresponds to a low loading of the filter device, although this is not present per se.
  • An alternative embodiment of the inventive method provides that upstream of the filter device in an oxidation catalyst NO 2 is generated, that the sensor device is disposed between the oxidation catalyst and the filter device that, taking into account the exhaust gas temperature, a NO 2 concentration in the exhaust gas determined (estimated, for example ), and that from the NO 2 concentration on the strength of a continuous regeneration of the filter device is closed.
  • the possible degree of regeneration and, on the other hand, the particle content in the exhaust gas are known, which is both possible by the method proposed here and the corresponding sensor device, it is possible in turn to deduce the current loading of the filter device with increased precision.
  • the inventive method thus enables a simple assessment of the current state of the filter device. This is laid down in a further advantageous embodiment of the method according to the invention, according to which the current loading of the filter device is concluded by using the first signal and the second signal. This has far-reaching positive effects: If temperature peaks during regeneration can be avoided by a more precise knowledge of the amount of soot contained in the particle filter, then a less thermally stable, but more cost-effective filter material can be used.
  • the precision in determining the load is thereby increased by the fact that the temperature of the sensor device is at least approximately detected and / or determined and / or estimated, and that the difference between the exhaust gas temperature and the temperature of the sensor device at least indirectly in determining the current loading of the filter device taken into account becomes.
  • the "thermophoretic effect" can be included in the determination of Rußstromrung:
  • the Rußstromrung on the sensor device depends namely on the temperature difference between the sensor device and the exhaust gas. If the exhaust gas is significantly hotter than the sensor device (which is generally the case), more soot is deposited on the sensor device than at a lower temperature difference or even in the opposite case that the sensor device is hotter than the exhaust gas. With knowledge of the actual temperature conditions, it is therefore possible to deduce the actual soot content in the exhaust gas and consequently the soot load of the particulate filter from the detected soot accumulation on the sensor device with even higher accuracy.
  • a differential pressure sensor which detects the pressure difference across the filter device away, on the current load of the filter device is closed, and if this result is compared with the determined from the second signal load.
  • the second signal which is used to determine the temperature of the exhaust gas, allows a more accurate knowledge of the volumetric flow, which in turn allows optimization of the differential pressure sensor. If the determined loads differ by more than a certain limit value, there is a problem, so that, for example, a corresponding entry into a fault memory can be made and the problem during maintenance can be investigated. This facilitates maintenance and improves the emission and consumption quality of the internal combustion engine.
  • the two sensors are each arranged on exposed surfaces of the device exposed to the exhaust gas. As a result, even very dynamic processes can be detected reliably.
  • the sensor device may comprise a heating device with which the first sensor can be burned free of deposited particles, and the second sensor may be suitable for detecting the temperature of the sensor device.
  • the second sensor has a dual function, because it can be used on the one hand for monitoring the regeneration of the first sensor or the sensor device as a whole, and outside these phases it can be used for the detection of the exhaust gas temperature. This again reduces the costs and installation costs.
  • the manufacture of the sensor device is simplified in that it has two flat and adhered layers and that on the exposed side of the one layer, the first sensor, on the exposed side of the second layer, the second sensor, and between the two layers, the heater is arranged ,
  • such a sensor is very small and flat and builds can therefore be arranged at any point in the exhaust system of the internal combustion engine.
  • the combination of particle sensor and temperature sensor for detecting the exhaust gas temperature is particularly advantageous when it is used to carry out a method of the above type.
  • an internal combustion engine bears the reference numeral 10 as a whole. It comprises an engine block 12 and an exhaust system 14. In the exhaust system 14, initially an oxidation catalytic converter 16 and subsequently a particle filter 18 are arranged.
  • a first sensor device 22 is placed between the oxidation catalyst 16 and the filter device 18, which includes a particle sensor 24 and a temperature sensor 26 (wherein the sensor device 22 in principle also other locations in the exhaust pipe 20 can be arranged).
  • the signal of the particle sensor 24 is passed via a line 28, the signal of the temperature sensor 26 via a line 30 to a control and regulating device 32.
  • a differential pressure sensor 34 is arranged in the embodiment shown here, the signal is passed via a line 36 to the control and regulating device 32. In an embodiment not shown, such a differential pressure sensor is dispensed with.
  • a second sensor device 38 is placed in the exhaust pipe 20, which is constructed identically to the first sensor device 22. Again, a not shown embodiment is conceivable in which such a second sensor device is not present. It thus also includes a particle sensor 40 and a temperature sensor 42, whose signals are passed via lines 44 and 46 to the control and regulating device 32.
  • a lambda probe 48 is disposed immediately downstream of the oxidation catalyst 16 in the exhaust pipe 20 (also the lambda probe may not be realized in an embodiment not shown). Their signal passes via a line 50 to the control and regulating device 32.
  • the control and regulating device 32 is, as indicated by 52, connected to the engine block 12 by signal technology and controls there various functions. These include, for example, ignition and fuel injection.
  • soot particles may be contained in the exhaust gas.
  • the filter device 18 prevents these soot particles that are harmful to health, get into the environment. Due to the deposition of soot particles in the Filter device 18, however, their permeability is reduced. In order to avoid an excessive exhaust back pressure in the exhaust pipe 20, the filter device 18 is regenerated on the one hand continuously and on the other cyclically by the accumulated soot particles are oxidized.
  • the continuous regeneration takes place by means of NO 2 , which is generated in the upstream oxidation catalytic converter 16.
  • the cyclical regeneration of the filter device 18 is brought about by an increase in the exhaust gas temperature which, together with a catalytic coating of the filter device 18 provided in the present embodiment, but not shown in the figure, triggers an exothermic reaction.
  • the increase in the exhaust gas temperature can be effected, for example, by engine measures, for example the post-injection of fuel.
  • the regenerations of the filter device 18 can be monitored by means of the two sensor devices 22 and 38.
  • the sensor devices 22 and 38 are constructed identically.
  • the sensor device 22 is shown by way of example. Thereafter, the sensor device 22 comprises three successive laminated ceramic layers 54, 56 and 58, which in the present case are produced mainly because of the temperature resistance based on Al 2 O 3 or ZrO 2 .
  • the upper ceramic layer 54 in FIGS. 2 and 3 carries two electrodes 60 and 62 on its exposed outer side 59. The two electrodes 60 and 62 are patterned "interdigitally" for a resistivity measurement and thus form the particle sensor 24.
  • the central ceramic layer 56 in FIGS. 2 and 3 carries on its side remote from the layer 54 a meander-shaped heating device 64, through which the Sensor device 22 can be heated in the region of the particle sensor 24. As a result, if required, soot particles accumulated on the sensor device 22 can be burnt.
  • the lower ceramic layer 58 in FIGS. 2 and 3 has a meandering structure made of a thin platinum layer 66, by which the temperature sensor 26 is formed. The platinum layer is deposited on the exposed side 68 of the ceramic layer 58 and provided with a thin ceramic protective layer. By arranging the platinum layer 66, the temperature sensor 26 can detect the temperature of the exhaust gas comparatively accurately. In a first approximation, the temperature of the sensor device 22 can be set equal to the exhaust gas temperature.
  • the temperature of the sensor device 22 which is different from the exhaust gas, can also be estimated by means of a numerical model or by means of an estimation method (for example an observer method). It is also possible to provide a further, not shown in the figure, temperature sensor on the layer 54 facing side of the layer 56 to detect the temperature of the sensor device 22 with its signal.
  • An embodiment of a sensor device 22 shown in FIG. 4 and even more flat consists of only two ceramic layers 54 and 58.
  • the heating device not visible in FIG. 4 is applied to the same lower ceramic layer 58 as the platinum layer forming the temperature sensor 26.
  • From Figure 5 shows how the signal of the temperature sensors 26 and 42 of the two sensor devices 22 and 38 is used: After a start block 70 is queried in a block 72, whether just a regeneration of the first sensor device 22 or the second sensor device 38 takes place. If the answer in block 72 is no, the signal of the temperature sensor 26 or of the temperature sensor 42 is used to determine the exhaust gas temperature T ex (block 74).
  • the exhaust gas temperature can not be determined with the desired accuracy from the signal of the temperature sensors 26 and 42 not only during the actual operation of the heater 64 but also during a subsequent cooling phase .
  • the signal of the temperature sensor 26 or 42 is used in block 76 to determine the temperature T sens of the sensor device 22 or 38, which makes it possible to draw conclusions about the amount of soot deposited. The method ends in block 78.
  • thermophoretic effect of the soot accumulation on the sensor device 22 or 42 taken into account and thereby the accuracy in determining the amount of soot actually contained in the exhaust gas and deposited in the particulate filter can be increased.
  • a procedure for monitoring the regeneration of the filter device 18 is shown in FIG. 6, using the signal of the second sensor device 38.
  • a cyclical regeneration of the filter device 18 is initiated, for example, by an increase in the exhaust gas temperature (block 80 in FIG. 6), an exothermic reaction is initiated in the filter device 18 (block 82 in FIG. 6), which leads to an increase in the exhaust gas temperature downstream of FIG the filter device 18 leads.
  • This is detected by the temperature sensor 42, and the corresponding temperature T ex is passed to the control and regulating device 32.
  • the control and regulating device 32 can influence the exothermic reaction in the filter device 18. If, for example, the temperature T ex exceeds a limit value, a lowering of the exhaust gas temperature is initiated by the control and regulating device 32 in order to reduce the extent of the exothermic reaction.
  • the exothermic reaction can proceed so vigorously that a limit value G2 of the exhaust gas temperature T ex detected by the temperature sensor 42 is exceeded.
  • the limit value G2 is chosen so that when exceeding it is to be assumed that in the filter device 18, a permissible temperature has been exceeded and damage to the structure of the filter device 18, for example, a hole has occurred. If such a hole occurs, a signal dp of the differential pressure sensor 34 ( Figure 7b) drops very rapidly, since the exhaust gas can pass through the hole in the filter device 18 with little resistance, although at other locations of the filter device 18, the soot particles are not completely burned are. In the control and regulating device 32, therefore, the signal of the differential pressure sensor 36 is adapted in such a case.
  • a corresponding method is shown in FIG. 8: After a start block 84, it is checked in 86 whether the exhaust gas temperature T ex detected by the temperature sensor is greater than a limit value G1. If this is the case, a query is made in block 90 as to whether the exhaust gas temperature T ex is greater than a limit value G2 (G2> G1). If this is also the case, the signal dp of the differential pressure sensor 34 is adapted in a block 92. Otherwise, the exothermic reaction in the filter device 18 and thus also its regeneration in block 88 is slowed down. The method ends in an end block 94.
  • the first sensor device 22 arranged upstream of the filter device 18 can be used to predict the loading of the filter device 18 and to monitor its continuous regeneration. This is evident from FIG. 8: An oxygen content (block 96) is determined by means of the lambda probe 48 or from stored map data, and an exhaust gas temperature T ex (block 98) is determined by means of the temperature sensor 26. From this, the quantity of nitrogen oxide produced in the oxidation catalytic converter 16 is determined or estimated in 100 with the aid of stored characteristic map data. From this results in block 102 again a strength -dC / dt of the possible degradation of deposited in the filter device 18 soot particles. Due to the signal of the particle sensor 24, a strength + dC / dt of the possible increase of deposited soot particles is determined in 104.
  • a balance is created from which a possible current loading Cloadl of the filter device 18 with soot particles results.
  • a current charge Cload2 of the filter device 18 with soot particles is likewise determined in 110.
  • the Both loads determined in blocks 106 and 110 are compared with one another in block 112. Depending on the comparison, the signal of the differential pressure sensor 34 is adapted in block 114.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Processes For Solid Components From Exhaust (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
EP05106590A 2004-09-28 2005-07-19 Méthode pour le fonctionnement d'un moteur à combustion interne et capteur pour détecter au moins une valeur caractéristique dans les gaz d'échappement du moteur à combustion interne Withdrawn EP1640588A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200410046882 DE102004046882B4 (de) 2004-09-28 2004-09-28 Verfahren zum Betreiben einer Brennkraftmaschine, sowie zugehöriges Computerprogramm, elektrisches Speichermedium und Steuer- und/oder Regeleinrichtung zur Erfassung einer Zustandsgröße im Abgas der Brennkraftmaschine

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Publication Number Publication Date
EP1640588A2 true EP1640588A2 (fr) 2006-03-29
EP1640588A3 EP1640588A3 (fr) 2012-05-09

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Cited By (2)

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Publication number Priority date Publication date Assignee Title
DE102009024640A1 (de) * 2009-06-02 2010-12-23 Helag-Electronic Gmbh Sensorvorrichtung
ES2375117A1 (es) * 2008-01-14 2012-02-27 Robert Bosch Gmbh Procedimiento para medir la temperatura.

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DE102007013522A1 (de) 2007-03-21 2008-09-25 Robert Bosch Gmbh Sensorelement eines Gassensors
DE102016217775A1 (de) 2016-09-16 2018-03-22 Robert Bosch Gmbh Sensorelement zur Erfassung von Partikeln eines Messgases in einem Messgasraum
DE102016225868A1 (de) 2016-12-21 2018-06-21 Robert Bosch Gmbh Sensorelement zur Erfassung von Partikeln eines Messgases in einem Messgasraum
DE102017205064A1 (de) 2016-12-28 2018-06-28 Robert Bosch Gmbh Sensorelement zur Erfassung mindestens einer Eigenschaft eines Messgases in einem Messgasraum
DE102016226275A1 (de) 2016-12-28 2018-06-28 Robert Bosch Gmbh Sensorelement zur Erfassung von Partikeln eines Messgases in einem Messgasraum
DE102017209392A1 (de) 2017-06-02 2018-12-06 Robert Bosch Gmbh Sensorelement zur Erfassung von Partikeln eines Messgases in einem Messgasraum
DE102017212787A1 (de) 2017-07-25 2019-01-31 Robert Bosch Gmbh Sensorelement zur Erfassung von Partikeln in einem partikelbeladenen Messgas und Verfahren zu dessen Betrieb
DE102018212863A1 (de) 2017-09-26 2019-03-28 Robert Bosch Gmbh Sensoranordnung zur Erfassung von Partikeln eines Messgases in einem Messgasraum und Verfahren zur Erfassung von Partikeln eines Messgases in einem Messgasraum
DE102018207784A1 (de) 2017-12-19 2019-06-19 Robert Bosch Gmbh Sensoranordnung zur Erfassung von Partikeln eines Messgases in einem Messgasraum und Verfahren zur Erfassung von Partikeln eines Messgases in einem Messgasraum
DE102018207789A1 (de) 2017-12-19 2019-06-19 Robert Bosch Gmbh Sensoranordnung zur Erfassung von Partikeln eines Messgases in einem Messgasraum und Verfahren zur Erfassung von Partikeln eines Messgases in einem Messgasraum
DE102018207793A1 (de) 2017-12-19 2019-06-19 Robert Bosch Gmbh Verfahren zur Erfassung von Partikeln eines Messgases in einem Messgasraum und Sensoranordnung zur Erfassung von Partikeln eines Messgases in einem Messgasraum
DE102019211483A1 (de) 2019-08-01 2021-02-04 Robert Bosch Gmbh Sensorelement zur Erfassung von Partikeln eines Messgases in einem Messgasraum
DE102020215456A1 (de) 2020-12-08 2022-06-09 Robert Bosch Gesellschaft mit beschränkter Haftung Verfahren zur Funktionskontrolle eines Sensors zur Detektion von Rußpartikeln in einem Abgas

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Publication number Priority date Publication date Assignee Title
ES2375117A1 (es) * 2008-01-14 2012-02-27 Robert Bosch Gmbh Procedimiento para medir la temperatura.
DE102009024640A1 (de) * 2009-06-02 2010-12-23 Helag-Electronic Gmbh Sensorvorrichtung
DE102009024640B4 (de) * 2009-06-02 2012-02-16 Helag-Electronic Gmbh Sensorvorrichtung

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DE102004046882B4 (de) 2014-02-06
EP1640588A3 (fr) 2012-05-09

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