WO1999056009A1 - Dispositif de pot catalytique - Google Patents
Dispositif de pot catalytique Download PDFInfo
- Publication number
- WO1999056009A1 WO1999056009A1 PCT/FR1999/000958 FR9900958W WO9956009A1 WO 1999056009 A1 WO1999056009 A1 WO 1999056009A1 FR 9900958 W FR9900958 W FR 9900958W WO 9956009 A1 WO9956009 A1 WO 9956009A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- grid
- preheating
- engine
- heating
- catalysis means
- Prior art date
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
- F01N3/22—Control of additional air supply only, e.g. using by-passes or variable air pump drives
- F01N3/222—Control of additional air supply only, e.g. using by-passes or variable air pump drives using electric valves only
-
- 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 ; Methods of operation or control of catalytic converters
- 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
- 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
-
- 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
- F01N3/306—Preheating 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
-
- 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
Definitions
- the present invention relates to the field of catalytic converters intended to treat the exhaust gases of internal combustion engines, in particular for vehicles, with the aim of reducing the emission of polluting components such as carbon monoxide, nitrogen oxides or unburnt hydrocarbons.
- a catalytic converter For a catalytic converter to effectively treat these polluting exhaust emissions, its temperature must be above a threshold called the ignition temperature.
- the priming temperature is generally reached thanks to the heating of the catalytic converter by the exhaust gases which pass through it.
- one solution consists in accelerating the rise in temperature of the catalytic converter by heating the gases at the inlet of the latter via a heating grid, possibly also covered with a catalytic coating, and located in upstream of the catalyst proper.
- the electric heating of a catalytic converter is carried out by electrically supplying the resistance of the heating grid after starting the engine. Obtaining the temperature ignition is conditioned by the electric heating power of the grid, the flow and the temperature of the gases entering the catalytic converter.
- the electric power available on a vehicle is limited, in particular by the dimensioning of the alternator and the battery. The power that the heating grid can withstand is also limited.
- the present invention aims to reduce the emission of polluting components, by allowing the catalyst to be brought to an adequate temperature.
- the catalytic converter device is intended for treating the exhaust gases of an internal combustion engine, and comprises catalysis means and a preheating grid disposed upstream of the catalysis means in the direction d gas flow.
- the catalytic converter device comprises an air circulation pump from the preheating grid to the catalysis means to allow the heating of the catalysis means by the heated air during its passage through the preheating grid before the engine starts. .
- the catalysis means can thus be at the priming temperature when the engine starts.
- the air circulation pump and the preheating grid are supplied by a dual-voltage network.
- the catalytic converter device comprises a sensor for the temperature of the catalysis means.
- the catalytic converter device can be connected to a sensor for charging the starting battery of the engine. It can also be connected to an engine water temperature sensor and / or to an engine load sensor.
- the invention also relates to a method for controlling the preheating of a catalytic converter intended to treat the exhaust gases of an internal combustion engine.
- the catalytic converter comprises means of catalysis and a preheating grid arranged upstream of the means of catalysis in the direction of flow of the gases. Before starting the engine, said grid is preheated and air is circulated from the preheating grid to the catalysis means to bring them to temperature.
- the grid can be heated after the engine has started.
- the grid is heated during the starting of the engine, if this starting takes place during the preheating period, so as to perfect the temperature rise of the catalysis means.
- the heating of the grid is stopped if the starting does not take place after a given heating time, in order to avoid excessive discharge of the battery or batteries which could harm the starting of the engine.
- the preheating of the heating grid must be accompanied by the actuation of the air circulation pump which transfers the heat produced by the heating grid to the catalyst located downstream of said heating grid in the absence gas flow from the engine.
- the preheating of the catalytic converter starts automatically before starting the internal combustion engine, for example when opening the driver's door of the vehicle, when neutralization of the immobilizer system or when the vehicle is switched on.
- step 1 the determination of the need or the possibility of preheating is carried out as a function of the criterion of the engine cooling water temperature, of the voltage present at the terminals of the battery and, where appropriate, of a fault diagnosis. Indeed, it is generally unnecessary to preheat the catalytic converter when the engine has just been running, which results in a high water temperature. It is also unnecessary, even harmful, to initiate a preheating of the catalytic converter if the battery is not sufficiently charged, since preheating can cause the complete discharge of the battery and prevent the vehicle from starting.
- preheating is activated at maximum power for a period calculated as a function of the water temperature.
- the lighting of an indicator light warns the driver and tells him not to start.
- the warning light goes off and the preheating power is reduced (step 3).
- the maintenance phase which makes it possible not to cool the catalyst while limiting the energy consumption if the driver does not start immediately after the indicator goes out.
- the duration of the holding phase is limited by calibration in order to avoid possible overheating of the preheating grid or of the catalyst, and to avoid excessive electrical consumption liable to discharge the battery.
- step 4 if the driver does not start before the end of the preheating maintenance phase, at low power, the preheating is cut.
- the driver then starts the engine (step 5).
- the cut-off preheating is maintained (step 6) for a calibratable delay time of a few seconds.
- step 7 the high power heating of the preheating grid while keeping the pump off. air circulation whose operation is no longer necessary.
- the duration of the high-power heating in step 7 depends on the water temperature. However, if during this stage, the driver demands from the engine a significant load greater than a predetermined threshold, the heating switches to a low power level in order to avoid possible overheating (stage
- the high heating power will be used again when the load drops below the threshold, with a calibratable hysteresis to take account of the transfer times to the catalytic converter.
- Step 8 ensures better priming of the catalyst, while avoiding the risks of overheating and limiting electrical consumption.
- the calibration of the durations of the different stages will depend on the technical characteristics of the engine, its depollution system and the depollution and consumption objectives to be achieved. There will be compensation for variations in the engine load by the engine idling control system when starting or stopping the preheating due to the consumption of the alternator.
- step 9 the heating is stopped and the air circulation pump is stopped if the latter has been activated after starting the engine.
- step 10 you exit the heating control process.
- step 3 From step 3 of keeping the preheating at low power, if the engine starts during said step 3, we then go to step 11 in which the preheating is brought back to low power in order to have the capacity of the battery to power the starter.
- step 11 After step 11, we resume step 7 corrects described above.
- step 1 it turns out that the water temperature is higher than the set threshold or that the battery voltage is insufficient, we then go directly to step 10 and the possibility of preheating n is not used.
- a computer is used connected to the water temperature sensor, to the load sensor of the battery, the catalyst temperature sensor and the engine load sensor.
- step 10 of end of preheating constitutes a default operating mode inherent to a malfunction of the vehicle and capable of avoiding overheating of the preheating grid. This reduces the risk of premature destruction of the catalytic converter.
- the advantages of an electrically heated catalytic converter are used as well as possible, which makes it possible to significantly increase the potential for cleaning up exhaust gases. If a given emission level of pollutants is fixed, the device and the method in accordance with the invention make it possible to reduce the necessary preheating power and therefore its cost as well as the cost of the electrical supply system.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP99915814A EP1075590A1 (fr) | 1998-04-29 | 1999-04-22 | Dispositif de pot catalytique |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9805405A FR2778206B1 (fr) | 1998-04-29 | 1998-04-29 | Dispositif de pot catalytique |
FR98/05405 | 1998-04-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999056009A1 true WO1999056009A1 (fr) | 1999-11-04 |
Family
ID=9525835
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR1999/000958 WO1999056009A1 (fr) | 1998-04-29 | 1999-04-22 | Dispositif de pot catalytique |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1075590A1 (fr) |
FR (1) | FR2778206B1 (fr) |
WO (1) | WO1999056009A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114651115A (zh) * | 2019-09-11 | 2022-06-21 | 日产自动车株式会社 | 启动内燃机时使用三元催化器处理污染物的方法 |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3042814B1 (fr) * | 2015-10-27 | 2017-11-10 | Renault Sas | Procede d’alimentation electrique d’un dispositif de chauffage des gaz d’echappement d’un groupe motopropulseur d’un vehicule automobile et vehicule associe |
FR3065028B1 (fr) | 2017-04-07 | 2019-12-20 | Faurecia Systemes D'echappement | Procede de purification des gaz d'echappement d'un vehicule, dispositif de purification correspondant |
GB2581775B (en) * | 2019-02-19 | 2021-09-08 | Jaguar Land Rover Ltd | Catalyst preheat control apparatus and method |
GB2581774B (en) * | 2019-02-19 | 2021-09-08 | Jaguar Land Rover Ltd | Catalyst preheat control apparatus and method |
FR3102210A1 (fr) | 2019-10-21 | 2021-04-23 | Renault S.A.S. | Procédé de MISE EN ACTION D’UN système DE POST-TRAITEMENT DE MOTEUR A COMBUSTION INTERNE ET DISPOSITIF ASSOCIE |
FR3107304B1 (fr) | 2020-02-18 | 2022-02-11 | Renault Sas | Dispositif catalytique pour traitement des gaz d’echappement d’un moteur a combustion interne |
FR3109606B1 (fr) | 2020-04-23 | 2022-04-22 | Renault Sas | Dispositif catalytique pour traitement des gaz d’echappement d’un moteur, comportant un organe d’injection d’air |
FR3109607B1 (fr) | 2020-04-23 | 2022-05-13 | Renault Sas | Dispositif catalytique pour traitement des gaz d’echappement d’un moteur, comportant un organe d’injection d’air |
GB2594967B (en) | 2020-05-13 | 2022-05-18 | Ford Global Tech Llc | Engine assembly and method |
FR3122215B1 (fr) * | 2021-04-26 | 2024-02-16 | Psa Automobiles Sa | Procede d’injection d’air dans un catalyseur des gaz d’echappement |
FR3122901B1 (fr) | 2021-05-11 | 2023-04-21 | Renault Sas | Moteur à combustion interne équipé de moyens de préchauffage d’un catalyseur de dépollution des gaz brûlés |
FR3135751A1 (fr) | 2022-05-20 | 2023-11-24 | Renault S.A.S | Moteur à combustion interne et procédé de pilotage de ce moteur |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03260313A (ja) * | 1990-03-09 | 1991-11-20 | Nippon Steel Corp | 内燃機関の排ガス脱硝方法 |
US5666804A (en) * | 1993-03-29 | 1997-09-16 | Mitsubishi Denki Kabushiki Kaisha | Secondary air supplying apparatus for internal combustion engine and air heating apparatus thereof |
US5675968A (en) * | 1992-08-25 | 1997-10-14 | Mitsubishi Denki Kabushiki Kaisha | Secondary air control apparatus for exhaust gas purifier |
US5724810A (en) * | 1992-06-23 | 1998-03-10 | Mitsubishi Denki Kabushiki Kaisha | Controlling apparatus for introduction air into an exhaust pipe of an internal combustion engine |
-
1998
- 1998-04-29 FR FR9805405A patent/FR2778206B1/fr not_active Expired - Fee Related
-
1999
- 1999-04-22 EP EP99915814A patent/EP1075590A1/fr not_active Withdrawn
- 1999-04-22 WO PCT/FR1999/000958 patent/WO1999056009A1/fr not_active Application Discontinuation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03260313A (ja) * | 1990-03-09 | 1991-11-20 | Nippon Steel Corp | 内燃機関の排ガス脱硝方法 |
US5724810A (en) * | 1992-06-23 | 1998-03-10 | Mitsubishi Denki Kabushiki Kaisha | Controlling apparatus for introduction air into an exhaust pipe of an internal combustion engine |
US5675968A (en) * | 1992-08-25 | 1997-10-14 | Mitsubishi Denki Kabushiki Kaisha | Secondary air control apparatus for exhaust gas purifier |
US5666804A (en) * | 1993-03-29 | 1997-09-16 | Mitsubishi Denki Kabushiki Kaisha | Secondary air supplying apparatus for internal combustion engine and air heating apparatus thereof |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 016, no. 069 (M - 1212) 20 February 1992 (1992-02-20) * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114651115A (zh) * | 2019-09-11 | 2022-06-21 | 日产自动车株式会社 | 启动内燃机时使用三元催化器处理污染物的方法 |
Also Published As
Publication number | Publication date |
---|---|
FR2778206B1 (fr) | 2000-12-15 |
EP1075590A1 (fr) | 2001-02-14 |
FR2778206A1 (fr) | 1999-11-05 |
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