EP4165291A1 - Circuit de depollution d'echappement, systeme de depollution comprenant ce circuit, et procede de depollution mettant en oeuvre ce circuit - Google Patents
Circuit de depollution d'echappement, systeme de depollution comprenant ce circuit, et procede de depollution mettant en oeuvre ce circuitInfo
- Publication number
- EP4165291A1 EP4165291A1 EP21732414.4A EP21732414A EP4165291A1 EP 4165291 A1 EP4165291 A1 EP 4165291A1 EP 21732414 A EP21732414 A EP 21732414A EP 4165291 A1 EP4165291 A1 EP 4165291A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pollution control
- circuit
- exhaust
- unit
- electric
- 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- Withdrawn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
- 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
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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
- F01N3/18—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
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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
- F01N3/18—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
- F01N3/22—Control of additional air supply only, e.g. using by-passes or variable air pump drives
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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
- F01N3/24—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 constructional aspects of converting apparatus
- F01N3/30—Arrangements for supply of additional air
-
- 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
- F01N3/24—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 constructional aspects of converting apparatus
- F01N3/30—Arrangements for supply of additional air
- F01N3/32—Arrangements for supply of additional air using air pump
- F01N3/323—Electrically driven air pumps
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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
- F01N3/24—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 constructional aspects of converting apparatus
- F01N3/30—Arrangements for supply of additional air
- F01N3/34—Arrangements for supply of additional air using air conduits or jet air pumps, e.g. near the engine exhaust port
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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
- F01N5/00—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy
- F01N5/04—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy the devices using kinetic energy
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
- F01N9/00—Electrical control of exhaust gas treating apparatus
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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
- F02D41/0002—Controlling intake air
- F02D41/0007—Controlling intake air for control of turbo-charged or super-charged engines
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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
- 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
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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
- F01N2270/00—Mixing air with exhaust gases
- F01N2270/04—Mixing air with exhaust gases for afterburning
-
- 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
- F01N2340/00—Dimensional characteristics of the exhaust system, e.g. length, diameter or volume of the exhaust apparatus; Spatial arrangements of exhaust apparatuses
- F01N2340/06—Arrangement of the exhaust apparatus relative to the turbine of a turbocharger
-
- 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
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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
- 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
- F01N2900/08—Parameters used for exhaust control or diagnosing said parameters being related to the engine
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/18—Parameters used for exhaust control or diagnosing said parameters being related to the system for adding a substance into the exhaust
- F01N2900/1804—Properties of secondary air added directly to the exhaust
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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
- F02D41/024—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to increase temperature 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
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/042—Introducing corrections for particular operating conditions for stopping the engine
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
-
- 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
- Y02T10/12—Improving ICE efficiencies
-
- 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 the field of exhaust circuits of vehicles with thermal engines, more particularly to systems making it possible to limit the pollution emitted via these circuits.
- an objective of the present invention is to further limit the emission of polluting gases, in particular when starting the engine.
- the invention provides an exhaust pollution control circuit for a thermal engine vehicle, the circuit comprising an upstream filtration device, a compressor unit of a turbocharger, an engine unit, a turbine unit of the turbocharger, and a catalytic treatment unit comprising an electric catalyst heater.
- the pollution control circuit comprises a bypass branch between an upstream bypass point disposed downstream of the filtration device, and a downstream bypass point disposed upstream of the catalytic treatment unit, and downstream of the engine unit.
- the bypass branch includes an electric air pump configured to draw air from the filtration device and infuse it into the catalytic treatment block.
- the pollution control circuit allows fresh air to be blown over the electric catalyst heater and the catalyst to be heated via the heated fresh air. This speeds up the activation of the catalyst before the engine starts and the first polluting gases are released. The invention thus makes it possible to limit the emission of polluting gases, since the preheating of the catalyst with fresh heated air makes it fully effective well before the arrival of the polluting gases.
- downstream bypass point is disposed upstream of the turbine.
- this arrangement makes it possible to use the volute shape of the turbine of the turbocharger to distribute fresh air evenly over the heating device and then over the catalyst. This is to avoid having isolated hot spots that would damage the catalyst.
- the pollution control circuit further comprises a discharge valve bypass in line with the turbocharger turbine unit, and the downstream bypass point is disposed upstream of the discharge valve bypass and the turbine unit.
- the invention further relates to an exhaust pollution control system comprising an exhaust pollution control circuit according to the invention, and a Exhaust pollution control unit associated with the electric air pump and the electric catalyst heater.
- the exhaust pollution control unit is configured to be able to operate the electric air pump and the electric catalyst heater at least when the heat engine is off.
- Another object of the invention relates to an exhaust depollution method comprising steps of implementing an exhaust depollution circuit according to the invention, the method comprising a step of putting the air pump into operation. electric heater and electric catalytic converter, at least when the engine is off.
- the method comprises a step of determining the approach of a user, before the step of activating the electric air pump and the electric catalyst heater.
- the invention also relates to a computer program comprising program code instructions for performing the steps of the method according to the invention, when said program is running on a computer.
- the invention further relates to a thermal engine vehicle comprising an exhaust depollution circuit according to the invention.
- Another object of the invention relates to the use of a turbocharger turbine for blowing air into a catalytic processing unit including an electric catalyst heater, at least when the engine is off.
- FIG.1 schematically illustrates a pollution control circuit according to a first embodiment of the invention in a heat engine exhaust circuit
- FIG.2 schematically illustrates a pollution control circuit according to a second embodiment of the invention.
- the invention relates to exhaust systems of thermal motor vehicles.
- the invention relates more particularly to a pollution control circuit 1 making it possible to limit the pollution emitted via these circuits.
- Combustion in the engine 2 requires an air inlet 3 upstream of the combustion chamber of the engine 2.
- the inlet 3 is equipped with a filtration device 4 generally called an air filter.
- the air filter 4 leads to a compressor unit 5 of a turbocharger.
- the compressor unit 5 comprises a compressor wheel 5a in a compressor housing 5b.
- the depollution circuit 1 comprises, upstream, the filtration device 4 and then the compressor unit 5 of the turbocharger.
- the depollution circuit 1 then comprises an engine unit 6 comprising combustion chambers, then a turbine unit 7 of the turbocharger.
- the turbine unit 7 comprises a turbine 7a in the form of a wheel in a turbine housing 7b.
- the depollution circuit 1 then comprises a catalytic treatment unit 8 comprising an electric catalyst heating device 9 (said e-cata device).
- the treatment unit 8 comprises at least one exhaust catalyst 10, associated with the heater 9.
- the heater 9 may be in the form of an electrically heated grid disposed in the gas passage section.
- the processing unit may further comprise a particulate filter and an SCR (selective catalytic reduction) catalyst, such as those known.
- the pollution control circuit 1 comprises a bypass branch 11 for blowing fresh air over the catalyst 10 at least when the engine 2 is off.
- a bypass branch 11 for blowing fresh air over the catalyst 10 at least when the engine 2 is off.
- the bypass branch 11 is disposed between an upstream bypass point 12 which may also be called, as the case may be, air intake tapping or air intake boss; and a downstream branch point 13, which can also be called, as the case may be, air supply nozzle or air supply boss.
- the upstream bypass point 12 is disposed downstream of the filtration device 4. This is in particular a branch on the pipe downstream of said device 4.
- This can be, as a variant, a tap on a pipe or a boss on a part of the pollution control circuit 1.
- the bypass branch 11 comprises an electric air pump.
- the air pump 14 configured to draw air from the filtration device 4 and blow it into the catalytic treatment unit 8.
- the air pump 14 can be associated with a valve 14a.
- bypass branch 11 and the electric pump 14 allow fresh filtered air to be sucked in, and to be blown on the electric catalyst heating device 4. It is thus possible to preheat the catalyst 10 by 'fresh heated air, and thus accelerate the activation of catalystlO for greater efficiency. In fact, the heated fresh air increases the efficiency of the heating because it conveys the calories from the heater 4 to the catalyst 10 with better efficiency.
- the downstream bypass point 13 is arranged upstream of the turbine unit 7 of the turbocharger, more particularly upstream of the turbine 7a.
- This arrangement is highly advantageous. In fact, it makes it possible to use the shape of the volute of the turbine 7a of the turbocharger to diffuse air in a homogeneous manner on the heating device 9, then on the catalyst 10. In fact, the shape of the volute of the turbine 7a is designed to ensure the best possible watering of the catalyst 10. This avoids having hot spots which would damage the catalyst 10 by local overheating.
- the invention thus proposes a simplified air insufflation circuit, without requiring more connections, valves, additional and dedicated valves.
- the invention is also suitable for pollution control circuits including a discharge valve 15 commonly called "waste nostie.
- a discharge valve 15 commonly called "waste nostie.
- This is a configuration with a relief valve bypass 16 to the right of the turbocharger turbine block 7.
- the downstream bypass point 13 is arranged upstream of the discharge valve bypass 16 and of the turbine unit 7 of the turbocharger.
- the relief valve 15 is generally open when the engine 2 is off.
- the portion of air passing through the relief valve 15 is substantially less than that passing through the turbine 7a.
- the air passing through the turbine 7a presumably re-homogenizes the air passing through the relief valve 15.
- the downstream bypass point 13 can be arranged on the exhaust manifold 17, for example as illustrated in Figure 1. We can then speak of insufflation tap 13 in the exhaust manifold 17. Alternatively, the downstream bypass point 13 can be arranged on the turbine housing 7b, for example as illustrated in Figure 2. In the latter case, it is possible then speak of insufflation boss 13a in the turbine housing 7b.
- FIG. 2 shows a first arrow illustrating a spraying of cold air on a heating disc / grid (heating device 9) making it possible, by heating the air, to heat the catalyst 10 and make it rapidly active.
- a second arrow 9a illustrates the heating of the catalyst 10.
- the depollution circuit 1 is in particular part of an exhaust depollution system with a control unit 19 of the catalyst heater 9 and of the electric pump 14. It is therefore a control unit. exhaust pollution control.
- the control unit can be associated with a vehicle battery for power supply.
- the pollution control system in particular the exhaust pollution control unit 19, is configured to be able to operate the electric air pump 14 and the electric catalyst heater9 when the engine 2 is turned off.
- the pollution control system makes it possible to activate the heating and the supply of fresh air before the vehicle is started, even though engine 2 is off.
- the invention further relates to a depollution method comprising steps of implementing an exhaust depollution circuit 1 as described above.
- the method comprises a step of operating the electric air pump 14 and the electric catalyst heater 9, at least when the engine 2 is off.
- the method comprises a step of determining the approach of a user, before the step of operating the electric air pump 14 and the electric catalyst heater 9.
- the detection of Vehicle keys are used to determine the user's approach. This step allows you to anticipate the start of the vehicle and to start blowing in and heating the fresh air, as well as heating the catalyst a few minutes before the vehicle is started.
- the invention can be implemented approximately one minute before starting the vehicle, more particularly between 20 and 30 s before starting.
- the invention also relates to a computer program comprising program code instructions for executing the steps of a method as described above, when said program is running on a computer.
- the program can be integrated into the control unit 19, which itself can be included in the control system of the motor vehicle.
- the invention further relates to a heat engine vehicle comprising an exhaust pollution control circuit as described above.
- Another object of the invention relates to a use of a turbocharger turbine 7a within the scope of the invention.
- the volute shape is used to blow fresh filtered air into a catalytic treatment unit 8 comprising an electric catalyst heater 9, at least when the engine 2 is turned off.
- the invention therefore takes advantage of the passing character of the turbine 7a and its shape of the volute, even when the engine 2 is stopped, for a homogeneous distribution of heated fresh air accelerating the activation of the catalyst 10.
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)
- Supercharger (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2006287A FR3111385B1 (fr) | 2020-06-16 | 2020-06-16 | Circuit de depollution d’echappement, systeme de depollution comprenant ce circuit, et procede de depollution mettant en œuvre ce circuit |
| PCT/FR2021/050755 WO2021255352A1 (fr) | 2020-06-16 | 2021-05-03 | Circuit de depollution d'echappement, systeme de depollution comprenant ce circuit, et procede de depollution mettant en œuvre ce circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4165291A1 true EP4165291A1 (fr) | 2023-04-19 |
Family
ID=73642964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21732414.4A Withdrawn EP4165291A1 (fr) | 2020-06-16 | 2021-05-03 | Circuit de depollution d'echappement, systeme de depollution comprenant ce circuit, et procede de depollution mettant en oeuvre ce circuit |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4165291A1 (fr) |
| FR (1) | FR3111385B1 (fr) |
| WO (1) | WO2021255352A1 (fr) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1263247A (en) | 1968-04-16 | 1972-02-09 | British Insulated Callenders | Improvements in apparatus for controlling the tension in flexible material |
| JP4389739B2 (ja) * | 2004-09-29 | 2009-12-24 | 三菱自動車工業株式会社 | 過給機付き内燃機関 |
| KR20110118696A (ko) * | 2009-02-02 | 2011-10-31 | 보르그워너 인코퍼레이티드 | 구동 장치 |
| DE102009043087B4 (de) * | 2009-09-25 | 2023-08-03 | Volkswagen Ag | Brennkraftmaschine mit Sekundärluftzuführung sowie ein Verfahren zum Betreiben dieser |
| DE102016119816A1 (de) * | 2016-10-18 | 2018-04-19 | Volkswagen Ag | Verfahren und Vorrichtung zur Überwachung eines Sekundärluftsystems |
| DE102017113366A1 (de) * | 2017-06-19 | 2018-12-20 | Volkswagen Aktiengesellschaft | Abgasnachbehandlungssystem sowie Verfahren zur Abgasnachbehandlung eines Verbrennungsmotors |
| DE102017130695B4 (de) * | 2017-12-20 | 2025-11-06 | Volkswagen Aktiengesellschaft | Verfahren zur Abgasnachbehandlung eines Verbrennungsmotors in einem Hybridfahrzeug sowie Hybridfahrzeug mit einem Abgasnachbehandlungssystem |
-
2020
- 2020-06-16 FR FR2006287A patent/FR3111385B1/fr active Active
-
2021
- 2021-05-03 WO PCT/FR2021/050755 patent/WO2021255352A1/fr not_active Ceased
- 2021-05-03 EP EP21732414.4A patent/EP4165291A1/fr not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| FR3111385B1 (fr) | 2022-10-21 |
| FR3111385A1 (fr) | 2021-12-17 |
| WO2021255352A1 (fr) | 2021-12-23 |
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