FR2921120A3 - Exhaust gas recirculation based anti-pollution device for oil engine of motor vehicle, has high and low pressure recirculation circuits traversing same dual shutter having two inlet valves and two outlet valves - Google Patents
Exhaust gas recirculation based anti-pollution device for oil engine of motor vehicle, has high and low pressure recirculation circuits traversing same dual shutter having two inlet valves and two outlet valves Download PDFInfo
- Publication number
- FR2921120A3 FR2921120A3 FR0706531A FR0706531A FR2921120A3 FR 2921120 A3 FR2921120 A3 FR 2921120A3 FR 0706531 A FR0706531 A FR 0706531A FR 0706531 A FR0706531 A FR 0706531A FR 2921120 A3 FR2921120 A3 FR 2921120A3
- Authority
- FR
- France
- Prior art keywords
- low pressure
- recirculation
- pressure
- valves
- valve
- 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- Withdrawn
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/65—Constructional details of EGR valves
- F02M26/71—Multi-way valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/02—EGR systems specially adapted for supercharged engines
- F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
- F02M26/05—High pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust system upstream of the turbine and reintroduced into the intake system downstream of the compressor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/02—EGR systems specially adapted for supercharged engines
- F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
- F02M26/06—Low pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust downstream of the turbocharger turbine and reintroduced into the intake system upstream of the compressor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/38—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with two or more EGR valves disposed in parallel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
- F02B29/04—Cooling of air intake supply
- F02B29/0406—Layout of the intake air cooling or coolant circuit
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/14—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system
- F02M26/15—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system in relation to engine exhaust purifying apparatus
Abstract
Description
RENO30FR PJ7920 DA 1 L'invention concerne un dispositif anti-pollution pour véhicule automobile, principalement par diminution des émissions de Nox à l'échappement, par EGR (Exhaust Gaz Recirculation), ainsi qu'un véhicule automobile en tant que tel équipé d'un tel dispositif. The invention relates to an anti-pollution device for a motor vehicle, mainly by reducing exhaust emissions from NOx, by EGR (Exhaust Gas Recirculation), as well as a motor vehicle as such equipped with such a device.
Il existe dans l'état de la technique des solutions pour lutter contre la pollution provoquée par les gaz d'échappement des véhicules automobiles. La figure 1 illustre une telle solution, qui comprend un moteur 1 alimenté en air par une entrée 2, un compresseur 3, un échangeur 4 puis une admission moteur 5. Pour diminuer l'émission en Nox des gaz d'échappement sortant sur l'échappement 6 du véhicule, une première solution, connue sous la dénomination anglo-saxonne d'EGR (Exhaust Gaz Recirculation) haute pression, consiste en une recirculation 8 des gaz d'échappement en sortie du moteur, traversant un échangeur 9 avant de rejoindre l'admission moteur 5, sous le contrôle d'une première vanne haute pression, non représentée. Une seconde solution, connue sous sa dénomination d'EGR basse pression, consiste en une recirculation 10 d'une partie des gaz d'échappement récupérés vers la sortie du véhicule, après leur passage par différents dispositifs de traitements comme un catalyseur, pour leur réadmission à l'entrée du compresseur 3. Une seconde vanne d'échappement 7 permet de régler la quantité de gaz basse pression à recirculer. Une telle solution de recirculation des gaz d'échappement présente l'inconvénient de nécessiter deux circuits de recirculation 8, 10 indépendants qui encombrent le compartiment moteur. Cette solution devient inapplicable dans le cas où il est nécessaire d'utiliser des vannes EGR plus performantes et encombrantes comme des vannes à ouverture proportionnelle dont les moteurs sont encombrants par rapport aux vannes on-off pneumatiques. Elle est aussi inapplicable RENO30FR PJ7920 DA 2 dans le cas des rnoteurs diesel à culasse dite uniflow pour lesquels l'admission et l'échappement se retrouvent du même côté du moteur. In the state of the art, there exist solutions for combating the pollution caused by the exhaust gases of motor vehicles. FIG. 1 illustrates such a solution, which comprises a motor 1 fed with air through an inlet 2, a compressor 3, an exchanger 4 and then a motor inlet 5. To reduce the emission of NOx exhaust gases leaving on the Exhaust 6 of the vehicle, a first solution, known under the name Anglo-Saxon EGR (Exhaust Gas Recirculation) high pressure, consists of a recirculation 8 of the exhaust gas at the output of the engine, passing through a heat exchanger 9 before joining the engine intake 5, under the control of a first high pressure valve, not shown. A second solution, known as its low-pressure EGR, consists of a recirculation of a part of the exhaust gas recovered to the vehicle outlet, after passing through various treatment devices such as a catalyst, for their readmission. at the compressor inlet 3. A second exhaust valve 7 makes it possible to adjust the amount of low pressure gas to be recirculated. Such an exhaust gas recirculation solution has the disadvantage of requiring two independent recirculation circuits 8, 10 which clutter the engine compartment. This solution becomes inapplicable in the case where it is necessary to use more efficient and bulky EGR valves such as proportional opening valves whose engines are bulky compared to pneumatic on-off valves. It is also inapplicable RENO30FR PJ7920 DA 2 in the case of diesel engine with so-called uniflow cylinder for which the intake and the exhaust are found on the same side of the engine.
Le but de l'invention est de fournir un dispositif anti-pollution EGR, obviant 5 aux inconvénients cités précédemment. The object of the invention is to provide an EGR anti-pollution device, obviating the disadvantages mentioned above.
Plus précisément, l'invention propose un dispositif anti-pollution EGR dont l'encombrement est fortement réduit. More specifically, the invention provides an EGR anti-pollution device whose size is greatly reduced.
10 Pour cela, l'invention repose sur un dispositif anti-pollution à base de recirculation de gaz d'échappement (EGR) pour véhicule automobile, comprenant un premier circuit de recirculation haute pression et un second circuit de recirculation basse pression, caractérisé en ce que les deux circuits de recirculation traversent une même vanne double 15 comprenant un clapet d'entrée pour les gaz haute pression, un clapet de sortie pour les gaz haute pression, un clapet d'entrée pour les gaz basse pression et un clapet de sortie pour les gaz basse pression. To this end, the invention is based on an exhaust gas recirculation (EGR) pollution control device for a motor vehicle, comprising a first high-pressure recirculation circuit and a second low-pressure recirculation circuit, characterized in that that the two recirculation circuits pass through the same double valve 15 comprising an inlet valve for the high-pressure gases, an outlet valve for the high-pressure gases, an inlet valve for the low-pressure gases and an outlet valve for low pressure gases.
La première recirculation haute pression des gaz d'échappement peut 20 reposer sur un circuit adapté pour la recirculation de gaz d'échappement haute pression prélevés en amont d'un turbocompresseur et injectés en amont de l'admission d'un moteur. The first high pressure recirculation of the exhaust gas can be based on a circuit adapted for the recirculation of high pressure exhaust gas taken upstream of a turbocharger and injected upstream of the inlet of an engine.
La seconde recirculation basse pression des gaz d'échappement peut 25 reposer sur un circuit adapté pour la recirculation de gaz basse pression prélevés en aval d'un volume de dépollution sur la ligne d'échappement, déviés dans un refroidisseur basse pression et injectés en amont d'un turbocompresseur. The second low-pressure recirculation of the exhaust gas can be based on a circuit adapted for the recirculation of low-pressure gas taken downstream of a pollution control volume on the exhaust line, diverted into a low-pressure cooler and injected upstream. a turbocharger.
RENO30FR PJ7920 DA 3 La vanne double peut comprendre deux entrées parallèles. Elle peut comprendre un seul actionneur permettant d'actionner les deux clapets d'entrée haute pression et basse pression. Elle peut aussi comprendre un seul actionneur permettant d'actionner les deux clapets de sortie haute pression et basse pression. Enfin, la vanne double peut être une vanne à ouverture proportionnelle. RENO30GB PJ7920 DA 3 The double valve can have two parallel inputs. It may include a single actuator for actuating the two high pressure and low pressure inlet valves. It may also include a single actuator for actuating the two high pressure and low pressure outlet valves. Finally, the double valve may be a proportional opening valve.
Les deux clapets du circuit haute pression sont avantageusement fermés quand les deux clapets du circuit basse pression sont ouverts et inversement. The two valves of the high pressure circuit are advantageously closed when the two valves of the low pressure circuit are open and vice versa.
L'invention porte aussi sur un véhicule automobile comprenant un dispositif anti-pollution tel que décrit précédemment. Ce dispositif antipollution peut être monté sur un moteur comprenant l'admission et l'échappement du même côté du moteur. The invention also relates to a motor vehicle comprising an anti-pollution device as described above. This anti-pollution device can be mounted on an engine comprising the intake and the exhaust on the same side of the engine.
Ces objets, caractéristiques et avantages de la présente invention seront exposés en détail dans la description suivante d'un mode d'exécution particulier fait à titre non-limitatif en relation avec les figures jointes parmi lesquelles : These objects, features and advantages of the present invention will be set forth in detail in the following description of a particular embodiment made in a non-limiting manner in relation to the appended figures among which:
La figure 1 représente une vue schématique de l'état de la technique ; la figure 2 représente une vue schématique du principe de l'invention ; la figure 3 représente un mode d'exécution de l'invention. La figure 2 illustre une mise en oeuvre de l'invention dans laquelle les éléments correspondant à ceux de la figure 1 de l'état de la technique portent les mêmes références.25 RENO30FR PJ7920 DA 4 Le moteur 1 d'un véhicule automobile est alimenté par une entrée d'air 2, l'air traversant un filtre à air 11, un turbocompresseur 3, un refroidisseur d'air de suralimentation 4 avant d'atteindre l'admission 5 du moteur 1. A l'échappement 6 du moteur 1, les gaz d'échappement traversent un volume de dépollution 12 avant d'atteindre la ligne d'échappement 13. Figure 1 shows a schematic view of the state of the art; Figure 2 shows a schematic view of the principle of the invention; FIG. 3 represents an embodiment of the invention. FIG. 2 illustrates an implementation of the invention in which the elements corresponding to those of FIG. 1 of the state of the art bear the same references.25 RENO30EN PJ7920 DA 4 The motor 1 of a motor vehicle is powered by an air inlet 2, the air passing through an air filter 11, a turbocharger 3, a charge air cooler 4 before reaching the inlet 5 of the engine 1. To the exhaust 6 of the engine 1 , the exhaust gases pass through a clearance volume 12 before reaching the exhaust line 13.
Selon l'invention, le moteur est équipé d'un dispositif anti-pollution EGR, qui comprend une première recirculation haute pression 8 des gaz d'échappement, prélevés en amont du turbocompresseur 3 après l'échappement 6 et injectés en amont de l'admission 5, et une seconde recirculation basse pression 10 de ces gaz, prélevés en aval du volume de dépollution 12 sur la ligne d'échappement, déviés dans un refroidisseur EG basse pression 14 et injectés en amont du turbocompresseur 3. Selon le concept de l'invention, ces deux circuits de recirculation 8, 10 utilisent une même vanne EGR 20 double. According to the invention, the engine is equipped with an anti-pollution device EGR, which comprises a first high-pressure recirculation 8 of the exhaust gases, taken upstream of the turbocharger 3 after the exhaust 6 and injected upstream of the engine. admission 5, and a second low-pressure recirculation 10 of these gases, taken downstream of the pollution control volume 12 on the exhaust line, deflected in a low-pressure EG cooler 14 and injected upstream of the turbocharger 3. According to the concept of the In the invention, these two recirculation circuits 8, 10 use the same double EGR valve 20.
Pour cela, la vanne double 20 comprend un clapet d'entrée EGR haute pression 21 et un clapet de sortie EGR haute pression 22, permettant de remplir la fonction de vanne du circuit EGR haute pression 8. Elle comprend de plus un clapet d'entrée EGR basse pression 23 et un clapet de sortie EGR basse pression 24, permettant de remplir la fonction de vanne du circuit EGR basse pression 10. Les différents clapets sont prévus pour éviter toute interférence, tout mélange, entre les deux circuits haute et basse pression 8, 10 qui restent distincts. Pour cela, les clapets d'entrée et sortie de chaque circuit de recirculation sont en opposition, les deux clapets du circuit haute pression 21, 22 étant fermés quand les deux clapets du circuit basse pression 23, 24 sont ouverts et inversement. La vanne 20 permet ainsi de remplir la double fonction de dosage du gaz recirculé sur chacun des deux circuits de recirculation 8, 10.30 RENO30FR PJ7920 DA 5 La figure 3 représente l'implémentation du concept précédent sur un moteur diesel à culasse uniflow . La vanne double 20 comprend deux clapets en entrée, haute pression 21 et basse pression 23, qui sont actionnés par un même actionneur 25, ce qui permet d'optimiser le compactage du dispositif. Pour cela, les deux entrées 21, 23, de la vanne sont accessibles par des flux parallèles, accédant à des ouvertures d'entrée de la vanne disposées dans un même plan. La vanne 20 comprend de plus deux clapets en sortie, haute pression 22 et basse pression 24, actionnés respectivement par deux actionneurs 26, 27. En variante, il est possible d'implémenter un seul actionneur en sortie de vanne 20 pour actionner les deux clapets de sortie 22, 24. For this purpose, the double valve 20 comprises a high-pressure EGR inlet valve 21 and a high-pressure EGR outlet valve 22, making it possible to fulfill the valve function of the high-pressure EGR circuit 8. It furthermore comprises an inlet flap valve. Low pressure EGR 23 and a low pressure EGR outlet valve 24, enabling the valve function of the low pressure EGR circuit 10 to be fulfilled. The various valves are provided to avoid any interference, any mixing, between the two high and low pressure circuits 8 , 10 which remain distinct. For this, the inlet and outlet valves of each recirculation circuit are in opposition, the two valves of the high pressure circuit 21, 22 being closed when the two valves of the low pressure circuit 23, 24 are open and vice versa. The valve 20 thus makes it possible to fulfill the double metering function of the recirculated gas on each of the two recirculation circuits 8, 10.30. FIG. 3 represents the implementation of the preceding concept on a diesel engine with a uniflow cylinder head. The double valve 20 comprises two inlet valves, high pressure 21 and low pressure 23, which are actuated by the same actuator 25, which optimizes the compaction of the device. For this, the two inputs 21, 23 of the valve are accessible by parallel flows, accessing valve inlet openings disposed in the same plane. The valve 20 further comprises two outlet valves, high pressure 22 and low pressure 24, respectively actuated by two actuators 26, 27. Alternatively, it is possible to implement a single actuator valve output 20 to actuate the two valves 22, 24.
Ainsi, la solution permet bien d'atteindre l'objet recherché car l'utilisation d'une même vanne double pour remplir les fonctions de vanne de recirculation haute et basse pression permet de réduire l'encombrement global de l'ensemble du dispositif anti-pollution EGR et de simplifier le montage de ce dispositif en réduisant grandement le nombre de fixations à réaliser. Cette solution permet par exemple d'utiliser une vanne à ouverture proportionnelle, et de monter le dispositif sur un moteur diesel à culasse uniflow .25 Thus, the solution makes it possible to achieve the desired object because the use of the same double valve to fulfill the functions of high and low pressure recirculation valve reduces the overall size of the entire anti-rotation device. EGR pollution and simplify the assembly of this device greatly reducing the number of fasteners to achieve. This solution makes it possible, for example, to use a proportional opening valve, and to mount the device on a diesel engine with a uniflow cylinder head.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0706531A FR2921120A3 (en) | 2007-09-17 | 2007-09-17 | Exhaust gas recirculation based anti-pollution device for oil engine of motor vehicle, has high and low pressure recirculation circuits traversing same dual shutter having two inlet valves and two outlet valves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0706531A FR2921120A3 (en) | 2007-09-17 | 2007-09-17 | Exhaust gas recirculation based anti-pollution device for oil engine of motor vehicle, has high and low pressure recirculation circuits traversing same dual shutter having two inlet valves and two outlet valves |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR2921120A3 true FR2921120A3 (en) | 2009-03-20 |
Family
ID=39333088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR0706531A Withdrawn FR2921120A3 (en) | 2007-09-17 | 2007-09-17 | Exhaust gas recirculation based anti-pollution device for oil engine of motor vehicle, has high and low pressure recirculation circuits traversing same dual shutter having two inlet valves and two outlet valves |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2921120A3 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3059724A1 (en) * | 2016-12-01 | 2018-06-08 | Peugeot Citroen Automobiles Sa | MOTOR CYLINDER HEAD WITH OPTIONAL GAS RECIRCULATION AT HIGH AND LOW PRESSURE |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6378509B1 (en) * | 2000-06-13 | 2002-04-30 | Caterpillar Inc. | Exhaust gas recirculation system having multifunction valve |
| EP1420159A2 (en) * | 2002-11-15 | 2004-05-19 | Isuzu Motors Limited | EGR system for internal combustion engine provided with a turbo-charger |
| WO2006115671A1 (en) * | 2005-04-21 | 2006-11-02 | International Engine Intellectual Property Company, Llc | Engine valve system and method |
| WO2007085944A1 (en) * | 2006-01-27 | 2007-08-02 | Toyota Jidosha Kabushiki Kaisha | Exhaust gas recirculation apparatus of an internal combustion engine and control method thereof |
-
2007
- 2007-09-17 FR FR0706531A patent/FR2921120A3/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6378509B1 (en) * | 2000-06-13 | 2002-04-30 | Caterpillar Inc. | Exhaust gas recirculation system having multifunction valve |
| EP1420159A2 (en) * | 2002-11-15 | 2004-05-19 | Isuzu Motors Limited | EGR system for internal combustion engine provided with a turbo-charger |
| WO2006115671A1 (en) * | 2005-04-21 | 2006-11-02 | International Engine Intellectual Property Company, Llc | Engine valve system and method |
| WO2007085944A1 (en) * | 2006-01-27 | 2007-08-02 | Toyota Jidosha Kabushiki Kaisha | Exhaust gas recirculation apparatus of an internal combustion engine and control method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3059724A1 (en) * | 2016-12-01 | 2018-06-08 | Peugeot Citroen Automobiles Sa | MOTOR CYLINDER HEAD WITH OPTIONAL GAS RECIRCULATION AT HIGH AND LOW PRESSURE |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |
Effective date: 20090529 |