EP3803073A1 - Procede de detection d'un catalyseur d'oxydation dans la ligne d'echappement d'un moteur diesel et loi de commande pour sa mise en & oeuvre - Google Patents
Procede de detection d'un catalyseur d'oxydation dans la ligne d'echappement d'un moteur diesel et loi de commande pour sa mise en & oeuvreInfo
- Publication number
- EP3803073A1 EP3803073A1 EP19744754.3A EP19744754A EP3803073A1 EP 3803073 A1 EP3803073 A1 EP 3803073A1 EP 19744754 A EP19744754 A EP 19744754A EP 3803073 A1 EP3803073 A1 EP 3803073A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- temperature
- catalyst
- downstream
- upstream
- interval
- 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.)
- Withdrawn
Links
Classifications
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- 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
- F01N11/002—Monitoring or diagnostic devices for exhaust-gas treatment apparatus the diagnostic devices measuring or estimating temperature or pressure in, or downstream of the exhaust apparatus
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- 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
- F01N3/103—Oxidation catalysts for HC and CO only
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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
- F02D41/021—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
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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
- F02D41/22—Safety or indicating devices for abnormal conditions
-
- 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
- F01N2550/24—Determining the presence or absence of an exhaust treating device
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Definitions
- the invention relates to a method for the detection of an oxidation catalyst in the exhaust line of a diesel engine.
- the invention relates to a method for diagnosing the possible presence of an active oxidation catalyst in the exhaust line of a diesel-powered vehicle as well as a control law for the implementation of said process.
- the invention also relates to the use of this detection method for integration into the control laws of diesel engines conforming to the Euro 6.3 standard.
- the modes of detection of the presence of an active oxidation catalyst in an exhaust line of a combustion engine use the energy absorption properties of the catalyst.
- the presence of a catalyst causes a temperature difference between the upstream and downstream of the catalytic zone which is higher than in the absence of the catalyst under identical diagnostic conditions.
- the absorption capacity of the catalyst can therefore be evaluated by measuring the temperatures upstream and downstream of the catalytic zone of the exhaust line, after a first start of the engine following a preliminary rest period at the end of which the temperatures, upstream and downstream of this zone, are uniform and substantially equal to the outside temperature.
- the known methods thus consist in measuring the difference between the temperature T4 upstream of the catalyst and the temperature T5 downstream, respectively, in the initial rest phase (T4i, T5i) and in steady engine operating conditions ( T4, T5).
- T4i, T5i initial rest phase
- T4, T5 steady engine operating conditions
- enthalpy the calculation of a parameter called “enthalpy” is then launched using the following formula: absolute value of (((T4-T4i) - (T5 -T5i))) / (273.15 + T4- 0.5x (T4i-T5i)) which is integrated as a function of time.
- this integral exceeds a calibrated and fixed threshold value, it is concluded that a catalyst is present in the catalytic zone. On the other hand, if this threshold is not exceeded after a certain time, under the conditions of activation of the diagnosis (these conditions being modifiable), it is concluded that the catalyst is not present.
- the enthalpy is also strongly impacted, which results in significant dispersion of the diagnostic results .
- the influence of the engine load results in a certain amount of heat entering the catalytic zone.
- a test with a high engine load but without catalyst leads to the same result, as regards the calculation of the diagnostic criterion, as a test with a low engine load and a catalyst.
- the invention consisted in not only taking into account the temperature differences between the upstream and downstream of the catalytic zone but to consider the time elapsed between a instant corresponding to reaching an upstream temperature threshold after starting the engine and an instant corresponding to reaching a downstream temperature threshold.
- the threshold of the downstream temperature is lower than the threshold of the upstream temperature.
- the interval between the charging time and the transfer time is greater than or equal to the reference duration, it is concluded that the catalyst is present the catalytic zone or otherwise its absence.
- the integral is calculated of the enthalpy defined by the formula: absolute value of (((T4-T4i) - (T5-T5i))) / (273.15 + T4-0.5x (T4i-T5i)) where T4i and T5i are the values initials, respectively, of the upstream temperature (T4) and the downstream temperature (T5) at the end of the stabilization operation.
- This variant increases the numerical difference between the tests with and without catalyst because the calculation of the enthalpy integral is dependent on the presence of the catalyst and that its value increases faster when a catalyst is present.
- Yet another variant implementation of the method as defined above is characterized in that when at time (t2) the downstream temperature has reached the threshold value, then the end Boolean indicator diagnostic (END) goes to 1 signifying that the diagnostic result is then reliable, and that simultaneously the time counter (t3), initiated when the upstream temperature has reached the threshold value, has not exceeded a threshold value corresponding to the reference duration (t3s), then the Boolean diagnostic result (RES) is 1 indicating the absence of a catalyst.
- Yet another object of the invention is a use of the detection method having the characteristics defined above for diesel vehicles and, in particular, for integration into the control laws of diesel engines conforming to the Euro standard. 6.3.
- the method of the invention takes into account the energy supplied to the catalyst to reliably distinguish the presence or absence of the catalyst
- the method of the invention allows a single adjustment for all diesel engines and the different shapes of motor vehicles, unlike previous methods. This setting can thus be pre-calibrated with a high level of confidence.
- the method of the invention is robust to variations in the engine load conditions which makes it possible to avoid doubtful results and detection errors as to the presence or absence of the catalyst which are sources of recourse warranty.
- the method of the invention thus offers, at the same time, an economic gain from the fact that the frequency of testing and control operations and the risks of replacing parts are significantly reduced and an improvement in the quality and Branding.
- FIG. 2 is a block diagram illustrating an embodiment of the control law of the method of the invention.
- the detection method of the present invention is based on the phenomenon of energy absorption by the catalyst.
- the absorption capacity of the catalyst can be evaluated by observing the temperatures, respectively, upstream T4 and downstream T5 of the catalytic zone of the exhaust line, that is to say, the zone in which the catalyst provided is normally arranged.
- the next step is to start the engine and then observe the temperature changes upstream and downstream of the catalytic zone.
- the increase in temperature T5 downstream of the catalytic zone is also gradual but delayed compared to the increase in temperature upstream T4. This delay is explained by the transfer of the heat input from upstream to downstream through the catalytic zone.
- the transfer time t2 depends on the length of this zone and on the presence or absence of a catalyst capable of absorbing, at an intermediate level, at least part of the initial heat input.
- downstream temperature T5 will generally be lower (or occasionally equal) than the upstream temperature T4, whatever the observation time.
- the method of the invention provides for fixing a threshold of the downstream temperature T5s corresponding to the passage of the heat input through the catalytic zone and to its arrival at the point of observation of the temperature T5 in a transfer time t2.
- the method of the invention consists in correlatively recording the charging time tl and the transfer time t2 under which the upstream temperature T4 and the downstream temperature T5 reach their predetermined thresholds T4s and T5s.
- interval (t2-tl), referenced t3, between the charging time tl and the transfer time t2 represents the delay in the rise in temperature T5 to the threshold T5s, at the output of the catalytic zone.
- the invention provides for fixing a threshold time value or reference duration t3s corresponding to the positive value interval t2-tl and calculated in considering the presence of a catalyst having a capacity for absorbing the given thermal energy which is the cause of the delay.
- T4-T4i - (T5-T5i)) / (273.15 + T4-0.5x (T4i-T5i)) where T4i and T5i are the initial temperatures, respectively, upstream and downstream at the end of the phase stabilization or maceration.
- the diagnosis concludes with the presence of the catalyst in the catalytic zone or otherwise with its absence.
- the detection method of the invention is associated with the control law described below and illustrated in Figure 2.
- the boolean end of diagnosis indicator changes to 1 signifying that the result of the diagnosis is then reliable, and that simultaneously the counter time t3, initiated when the upstream temperature T4a reaches the threshold value T4s, has not exceeded the threshold value corresponding to the reference duration t3s, then the boolean diagnostic result (RES) is 1 indicating the absence of a catalyst.
- the method of the invention applies to the detection of the oxidation catalyst in the exhaust lines for integration into the control laws of diesel engines in accordance with the Euro 6.3 standard.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (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 |
|---|---|---|---|
| FR1855056A FR3082236B1 (fr) | 2018-06-11 | 2018-06-11 | Procede de detection d’un catalyseur d’oxydation dans la ligne d’echappement d’un moteur diesel et utilisation dudit procede pour des vehicules automobiles equipes de moteurs diesel |
| PCT/FR2019/051203 WO2019239025A1 (fr) | 2018-06-11 | 2019-05-24 | Procede de detection d'un catalyseur d'oxydation dans la ligne d'echappement d'un moteur diesel et loi de commande pour sa mise en œuvre |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3803073A1 true EP3803073A1 (fr) | 2021-04-14 |
Family
ID=63834126
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19744754.3A Withdrawn EP3803073A1 (fr) | 2018-06-11 | 2019-05-24 | Procede de detection d'un catalyseur d'oxydation dans la ligne d'echappement d'un moteur diesel et loi de commande pour sa mise en & oeuvre |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3803073A1 (fr) |
| FR (1) | FR3082236B1 (fr) |
| WO (1) | WO2019239025A1 (fr) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11636870B2 (en) | 2020-08-20 | 2023-04-25 | Denso International America, Inc. | Smoking cessation systems and methods |
| US11813926B2 (en) | 2020-08-20 | 2023-11-14 | Denso International America, Inc. | Binding agent and olfaction sensor |
| US11881093B2 (en) | 2020-08-20 | 2024-01-23 | Denso International America, Inc. | Systems and methods for identifying smoking in vehicles |
| US12251991B2 (en) | 2020-08-20 | 2025-03-18 | Denso International America, Inc. | Humidity control for olfaction sensors |
| US11760169B2 (en) | 2020-08-20 | 2023-09-19 | Denso International America, Inc. | Particulate control systems and methods for olfaction sensors |
| US11828210B2 (en) | 2020-08-20 | 2023-11-28 | Denso International America, Inc. | Diagnostic systems and methods of vehicles using olfaction |
| US11932080B2 (en) | 2020-08-20 | 2024-03-19 | Denso International America, Inc. | Diagnostic and recirculation control systems and methods |
| US12017506B2 (en) | 2020-08-20 | 2024-06-25 | Denso International America, Inc. | Passenger cabin air control systems and methods |
| US12269315B2 (en) | 2020-08-20 | 2025-04-08 | Denso International America, Inc. | Systems and methods for measuring and managing odor brought into rental vehicles |
| US11760170B2 (en) | 2020-08-20 | 2023-09-19 | Denso International America, Inc. | Olfaction sensor preservation systems and methods |
| US12377711B2 (en) | 2020-08-20 | 2025-08-05 | Denso International America, Inc. | Vehicle feature control systems and methods based on smoking |
| US11624333B2 (en) | 2021-04-20 | 2023-04-11 | Kohler Co. | Exhaust safety system for an engine |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19955947C2 (de) * | 1999-11-19 | 2002-04-11 | Heraeus Electro Nite Int | Verfahren zur Überprüfung der katalytischen Aktivität eines Katalysators |
| FR2864145B1 (fr) * | 2003-12-19 | 2007-09-07 | Renault Sas | Procede de detection de la presence d'un systeme de depollution par mesure de temperature |
| WO2011072250A2 (fr) * | 2009-12-10 | 2011-06-16 | Cummins Ip, Inc | Appareil, système et procédé pour la détection de la présence d'un catalyseur |
| DE102014203327A1 (de) | 2014-02-25 | 2015-08-27 | Robert Bosch Gmbh | Bohrwerkzeug |
| US10190470B2 (en) | 2015-06-15 | 2019-01-29 | Deere & Company | Catalytic device detection system |
| DE102015212372B4 (de) * | 2015-07-02 | 2021-09-30 | Ford Global Technologies, Llc | Verfahren und System zum Überwachen eines Betriebs eines Katalysators |
-
2018
- 2018-06-11 FR FR1855056A patent/FR3082236B1/fr active Active
-
2019
- 2019-05-24 EP EP19744754.3A patent/EP3803073A1/fr not_active Withdrawn
- 2019-05-24 WO PCT/FR2019/051203 patent/WO2019239025A1/fr not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| FR3082236B1 (fr) | 2021-04-16 |
| FR3082236A1 (fr) | 2019-12-13 |
| WO2019239025A1 (fr) | 2019-12-19 |
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