FR3024541A1 - ARRANGEMENT OF A PRESSURE MEASURING DEVICE ON AN EXHAUST LINE COMPRISING A PARTICLE FILTER - Google Patents
ARRANGEMENT OF A PRESSURE MEASURING DEVICE ON AN EXHAUST LINE COMPRISING A PARTICLE FILTER Download PDFInfo
- Publication number
- FR3024541A1 FR3024541A1 FR1457432A FR1457432A FR3024541A1 FR 3024541 A1 FR3024541 A1 FR 3024541A1 FR 1457432 A FR1457432 A FR 1457432A FR 1457432 A FR1457432 A FR 1457432A FR 3024541 A1 FR3024541 A1 FR 3024541A1
- Authority
- FR
- France
- Prior art keywords
- stainless steel
- tubing
- arrangement
- downstream
- pressure
- 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.)
- Granted
Links
- 239000002245 particle Substances 0.000 title claims abstract description 8
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 40
- 239000010935 stainless steel Substances 0.000 claims abstract description 40
- 229920001296 polysiloxane Polymers 0.000 claims abstract description 23
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 11
- 238000001816 cooling Methods 0.000 claims abstract description 5
- 238000003466 welding Methods 0.000 claims description 3
- 238000005476 soldering Methods 0.000 claims 1
- 239000007789 gas Substances 0.000 abstract description 16
- 238000005219 brazing Methods 0.000 description 2
- 239000004071 soot Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000010339 dilation Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
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
- F01N9/00—Electrical control of exhaust gas treating apparatus
- F01N9/002—Electrical control of exhaust gas treating apparatus of filter regeneration, e.g. detection of clogging
-
- 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
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/16—Selection of particular materials
-
- 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 apparatus; Spatial arrangements of exhaust apparatuses
-
- 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
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/08—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a pressure sensor
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Silencers (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
Agencement d'un dispositif de contrôle de pression dans une ligne d'échappement (12) de véhicule automobile munie d'un filtre à particules (10), le dispositif comportant un capteur de pression différentielle (16) relié à un tuyau de capteur de pression amont (14) raccordé à un conduit de ligne d'échappement (120) situé en amont du filtre à particules (10) et relié à un tuyau de capteur de pression aval (18) raccordé à un conduit (122) de circulation de gaz d'échappement chauds situé en aval du filtre à particules (10), et comportant une tubulure en silicone (184) de diamètre interne (D1) du côté d'une première extrémité (180) reliée au capteur (16) et une tubulure en inox (186), de diamètre intérieur (D2) inférieur au diamètre (D1), du côté d'une deuxième extrémité (182) reliée au conduit de gaz d'échappement (122), de façon que le tuyau de pression aval (18) est apte à être traversé par les gaz d'échappement provenant du conduit aval (122), caractérisé en ce que les tubulures en silicone (180) et en inox (182) du tuyau de pression aval (18) sont reliées entre elles par une partie de jonction (20) formant zone de refroidissement des gaz d'échappement, de diamètre intérieur (D3) supérieur aux diamètres (D1) et (D2) des tubulures en silicone (184) et en inox (186) et ménagée dans la tubulure en inox (186).Arrangement of a pressure control device in a motor vehicle exhaust line (12) provided with a particle filter (10), the device comprising a differential pressure sensor (16) connected to a sensor tube (10) upstream pressure (14) connected to an exhaust line duct (120) upstream of the particulate filter (10) and connected to a downstream pressure sensor pipe (18) connected to a flow duct (122). hot exhaust gas located downstream of the particulate filter (10), and having a silicone tubing (184) of inner diameter (D1) on the side of a first end (180) connected to the sensor (16) and a tubing in stainless steel (186) having an inside diameter (D2) smaller than the diameter (D1), on the side of a second end (182) connected to the exhaust gas duct (122), so that the downstream pressure pipe ( 18) is adapted to be traversed by the exhaust gases from the downstream duct (122), ca characterized in that the silicone (180) and stainless steel (182) tubings of the downstream pressure pipe (18) are interconnected by a connecting portion (20) forming an exhaust gas cooling zone, of internal diameter (D3) greater than the diameters (D1) and (D2) of the silicone tubing (184) and stainless steel (186) and formed in the stainless steel tubing (186).
Description
- 1 - AGENCEMENT D'UN DISPOSITIF DE MESURE DE PRESSION SUR UNE LIGNE D'ECHAPPEMENT COMPORTANT UN FILTRE A PARTICULES L'invention concerne un agencement d'un dispositif de mesure de pression dans une ligne d'échappement de véhicule automobile munie d'un filtre à particules, le dispositif comportant un capteur de pression différentielle relié à un tuyau de capteur de pression amont raccordé à un conduit de ligne d'échappement situé en amont du filtre à particules et relié à un tuyau de capteur de pression aval raccordé à un conduit de circulation de gaz d'échappement chauds situé en aval du filtre à particules, et comportant, du côté d'une première extrémité reliée au capteur, une tubulure en silicone et, du côté d'une deuxième extrémité reliée au conduit de gaz d'échappement, une tubulure en inox, de diamètre interne inférieur au diamètre interne de la tubulure en silicone, de façon que le tuyau de pression aval est apte à être traversé par les gaz d'échappement provenant du conduit aval.The invention relates to an arrangement of a device for measuring pressure in a motor vehicle exhaust line provided with a device for measuring pressure in a motor vehicle exhaust line provided with a device for measuring pressure. particle filter, the device comprising a differential pressure sensor connected to an upstream pressure sensor pipe connected to an exhaust line pipe located upstream of the particulate filter and connected to a downstream pressure sensor pipe connected to a a hot exhaust gas flow duct situated downstream of the particulate filter, and having, on the side of a first end connected to the sensor, a silicone tubing and, on the side of a second end connected to the gas duct, exhaust, a stainless steel tubing, of internal diameter less than the internal diameter of the silicone tubing, so that the downstream pressure pipe is able to be traversed by the gases exhaust from the downstream duct.
Le dispositif de mesure de pression des gaz d'échappement circulant en amont et en aval du filtre à particules permet ainsi de contrôler le colmatage du filtre à particules. Cependant, les gaz d'échappement traversant le tuyau de capteur de pression aval étant extrêmement chauds, il peut arriver que, sous le passage répété des gaz chauds, l'intérieur de la tubulure en silicone, au niveau de sa jonction avec la tubulure en inox, soit brûlé, ce qui peut entrainer le perçage de la tubulure. La lecture de la pression est alors impossible. La mesure du chargement en suies du filtre à particules ne peut ainsi plus être effectuée ce qui provoque le déclenchement d'un voyant d'alerte au tableau de bord pour que le client fasse réparer le système de post traitement de son véhicule. Une solution consiste à augmenter la longueur de la tubulure en inox, l'inox n'étant pas sensible aux hautes températures, contrairement au silicone. Il est cependant nécessaire de prendre en compte d'autres contraintes, telles que les mouvements relatifs nécessaires de la ligne d'échappement, les longueurs de tubulures en silicone et en inox minimales pour que la pente nécessaire à - 2 - l'évacuation des condensats soit respectée, le coût de l'inox plus élevé que celui du silicone, etc. La solution représentant un compromis entre toutes ces contraintes consiste à utiliser une tubulure en inox de grande longueur et des fixations sur le filtre à particules. Cette solution présente toutefois des inconvénients majeurs comme un coût élevé et un encombrement important. Afin de pallier ces inconvénients, l'invention a pour objet un agencement d'un tuyau de capteur de pression pour un filtre à particules peu encombrant et peu onéreux. A cet effet, l'invention propose un agencement d'un dispositif de mesure de pression sur une ligne d'échappement du type cité ci-dessus, caractérisé en ce que les tubulures en silicone et en inox du tuyau de pression aval sont reliées entre elles par une partie de jonction formant zone de refroidissement des gaz d'échappement, de diamètre interne supérieur aux diamètres interne des tubulures en inox et en silicone, la zone de jonction étant ménagée dans la tubulure en inox. Selon d'autres caractéristiques de l'invention: - La partie de jonction présente la forme générale d'un cylindre. - La partie de jonction est formée par formage d'une pièce avec la tubulure en inox. - La partie de jonction est une pièce en inox rapportée sur la tubulure en inox par soudage. - La partie de jonction est une pièce en inox rapportée sur la tubulure en inox par brasage. - Le diamètre intérieur de la partie formant zone de refroidissement est de l'ordre de trois fois le diamètre intérieur de la tubulure en inox. - Le diamètre intérieur de la partie de jonction est de l'ordre de deux fois le diamètre intérieur de la tubulure en silicone. D'autres caractéristiques et avantages de l'invention apparaîtront à la lecture de la description d'exemples de réalisation d'un agencement d'un tuyau de capteur - 3 - de pression pour filtre à particules en référence aux dessins annexés dans lesquels . - La figure 1 est une vue d'un agencement d'un tuyau de capteur selon l'invention sur une ligne d'échappement. - La figure 2 est une vue schématique d'un tuyau de capteur de pression selon l'invention. Dans la description qui suit, nous prendrons à titre non limitatif une orientation longitudinale, verticale et transversale indiquée par le trièdre L,V,T de la figure 1. Des éléments identiques ou analogues sont désignés par les mêmes chiffres de référence. Tel que représenté à la figure 1, un filtre à particules 10 est disposé sur une ligne d'échappement 12 entre un conduit amont 120 de la ligne d'échappement 12 et un conduit aval 122. Afin de vérifier l'état de colmatage du filtre à particule 10, la ligne d'échappement 12 comporte un dispositif de mesure de la pression des gaz d'échappement à l'entrée et à la sortie du filtre à particules 10. Ce dispositif est constitué par un premier tuyau de pression amont 14, disposé entre le conduit amont 120 de la ligne d'échappement 12 et un capteur de pression différentielle 16.The device for measuring the pressure of the exhaust gases flowing upstream and downstream of the particulate filter thus makes it possible to control the clogging of the particulate filter. However, since the exhaust gas passing through the downstream pressure sensor pipe is extremely hot, it may happen that, under the repeated passage of the hot gases, the inside of the silicone tubing, at its junction with the tubing in stainless steel, either burned, which can cause the drilling of the tubing. The reading of the pressure is impossible. Measurement of soot loading of the particulate filter can no longer be performed which causes the triggering of a warning light on the dashboard for the customer to repair the post-processing system of his vehicle. One solution is to increase the length of the stainless steel tubing, stainless steel is not sensitive to high temperatures, unlike silicone. However, it is necessary to take into account other constraints, such as the necessary relative movements of the exhaust line, the minimum lengths of silicone and stainless steel tubing so that the slope necessary for the evacuation of the condensates is respected, the cost of stainless steel higher than that of silicone, etc. The solution representing a compromise between all these constraints is to use a stainless steel tubing of great length and fixings on the particulate filter. This solution, however, has major disadvantages such as high cost and large size. In order to overcome these drawbacks, the object of the invention is an arrangement of a pressure sensor pipe for a small and inexpensive particle filter. For this purpose, the invention proposes an arrangement of a device for measuring pressure on an exhaust line of the type mentioned above, characterized in that the silicone and stainless steel tubes of the downstream pressure pipe are connected between they have a connecting portion forming an exhaust gas cooling zone, of internal diameter greater than the internal diameters of the stainless steel and silicone tubing, the junction zone being formed in the stainless steel tubing. According to other characteristics of the invention: the joining part has the general shape of a cylinder. - The joining part is formed by forming a part with the stainless steel tubing. - The joining part is a stainless steel part attached to the stainless steel pipe by welding. - The joining part is a stainless steel part reported on the stainless steel pipe by brazing. - The inner diameter of the cooling zone portion is of the order of three times the inner diameter of the stainless steel tubing. - The inner diameter of the junction portion is of the order of twice the inner diameter of the silicone tubing. Other features and advantages of the invention will appear on reading the description of exemplary embodiments of an arrangement of a pressure sensor pipe for particle filter with reference to the accompanying drawings in which. - Figure 1 is a view of an arrangement of a sensor pipe according to the invention on an exhaust line. - Figure 2 is a schematic view of a pressure sensor pipe according to the invention. In the following description, we will take non-limiting longitudinal orientation, vertical and transverse indicated by the trihedron L, V, T of Figure 1. Identical or similar elements are designated by the same reference numerals. As shown in FIG. 1, a particle filter 10 is disposed on an exhaust line 12 between an upstream duct 120 of the exhaust line 12 and a downstream duct 122. In order to check the clogging state of the filter with particle 10, the exhaust line 12 comprises a device for measuring the pressure of the exhaust gas at the inlet and the outlet of the particulate filter 10. This device consists of a first upstream pressure pipe 14, disposed between the upstream duct 120 of the exhaust line 12 and a differential pressure sensor 16.
Le dispositif comporte également un deuxième tuyau de pression aval 18 présentant une première extrémité 180 reliée au capteur de pression différentielle 16 et une deuxième extrémité 182 reliée au conduit aval 122 de la ligne d'échappement 12. Le capteur de pression 16 est fixé à un élément de structure situé en aval du filtre à particules 10 au moyen d'une vis (non représentée) à proximité du conduit amont 120 de la ligne d'échappement 12. Le tuyau de pression aval 18 est composé, du côté de son extrémité 180 reliée au capteur de pression 16 d'une première tubulure 184 en silicone et, du côté de son extrémité 182 reliée au conduit aval 122, d'une tubulure en inox 186. - 4 - La tubulure en silicone 184 permet, en raison de sa souplesse, d'absorber les déformations dues aux fréquences vibratoires et à la dilatation de la ligne d'échappement. La tubulure en silicone 184 présente un diamètre intérieur D1 de l'ordre de par exemple 5,5 millimètres tandis que la tubulure en inox 186 présente un diamètre intérieur D2 de l'ordre de par exemple 4 millimètres, le diamètre D1 de la tubulure en silicone 184 étant supérieur au diamètre D2 de la tubulure en inox 186. La tubulure en silicone 184 et la tubulure 186 en inox sont reliées entre elles par une partie de jonction cylindrique 20 de diamètre D3 supérieur aux diamètres Dl et D2. Le diamètre intérieur D3 est de l'ordre de par exemple 12 millimètres. La forme cylindrique de la partie en jonction permet par exemple de ne pas présenter d'angle susceptible de provoquer une zone d'accumulation de suies. Le rapport entre les diamètres D3 et D1 est de l'ordre de deux environ tandis que le rapport entre les diamètres D3 et D2 est de l'ordre de trois environ.The device also comprises a second downstream pressure hose 18 having a first end 180 connected to the differential pressure sensor 16 and a second end 182 connected to the downstream duct 122 of the exhaust line 12. The pressure sensor 16 is attached to a structural element located downstream of the particulate filter 10 by means of a screw (not shown) near the upstream duct 120 of the exhaust line 12. The downstream pressure pipe 18 is composed, at its end end 180 connected to the pressure sensor 16 of a first tubing 184 of silicone and, on the side of its end 182 connected to the downstream conduit 122, a stainless steel tubing 186. - 4 - The silicone tubing 184 allows, because of its flexibility, to absorb the deformations due to vibratory frequencies and the dilation of the exhaust line. The silicone tubing 184 has an inside diameter D1 of the order of, for example, 5.5 millimeters, whereas the stainless steel tubing 186 has an inside diameter D2 of the order of, for example, 4 millimeters, the diameter D1 of the tubing in silicone 184 being greater than the diameter D2 of the stainless steel tubing 186. The silicone tubing 184 and the stainless steel tubing 186 are interconnected by a cylindrical junction portion 20 of diameter D3 greater than the diameters D1 and D2. The inside diameter D3 is of the order of, for example, 12 millimeters. The cylindrical shape of the junction portion allows for example not to have an angle likely to cause a soot accumulation zone. The ratio between the diameters D3 and D1 is of the order of about two while the ratio between the diameters D3 and D2 is of the order of about three.
La partie de jonction 20 est ménagée dans la tubulure en inox 186. Elle peut être formée d'une pièce avec la tubulure en inox 186 par formage ou bien consister en une pièce en inox rapportée sur la tubulure en inox 186 par soudage ou brasage. Tel que représenté à la figure 2, les gaz d'échappement en provenance du conduit aval 122 traversent le tuyau de pression aval 18 en direction du capteur de pression 16 selon la flèche Fl. En passant par la partie de jonction 20 de diamètre D3 plus grand que celui de la tubulure en inox 186, les gaz d'échappement se dilatent et parviennent ainsi à se refroidir. Ainsi, lorsqu'ils pénètrent dans la tubulure en silicone 184, ils sont suffisamment froids pour ne pas risquer de la détériorer. La tubulure en inox 186, plus résistante aux hautes températures est en contact avec les gaz chauds provenant de la ligne d'échappement qui remontent en raison des phénomènes de pression dans la veine gazeuse. La tubulure en silicone 184 moins résistante aux hautes températures est donc préservée et reste à température ambiante.The joining portion 20 is formed in the stainless steel tubing 186. It can be formed integrally with the stainless steel tubing 186 by forming or consist of a stainless steel insert on the stainless steel tubing 186 by welding or brazing. As shown in FIG. 2, the exhaust gases coming from the downstream duct 122 pass through the downstream pressure pipe 18 in the direction of the pressure sensor 16 according to the arrow F1. By passing through the joining portion 20 of diameter D3 plus large than that of the stainless steel tubing 186, the exhaust gases expand and thus manage to cool. Thus, when they enter the silicone tubing 184, they are cold enough to avoid damaging it. The stainless steel tubing 186, which is more resistant to high temperatures, is in contact with the hot gases coming from the exhaust line which rise due to pressure phenomena in the gas vein. The silicone tubing 184 less resistant to high temperatures is therefore preserved and remains at room temperature.
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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FR1457432A FR3024541B1 (en) | 2014-07-31 | 2014-07-31 | ARRANGEMENT OF A PRESSURE MEASURING DEVICE ON AN EXHAUST LINE COMPRISING A PARTICLE FILTER |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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FR1457432A FR3024541B1 (en) | 2014-07-31 | 2014-07-31 | ARRANGEMENT OF A PRESSURE MEASURING DEVICE ON AN EXHAUST LINE COMPRISING A PARTICLE FILTER |
Publications (2)
Publication Number | Publication Date |
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FR3024541A1 true FR3024541A1 (en) | 2016-02-05 |
FR3024541B1 FR3024541B1 (en) | 2016-08-19 |
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FR1457432A Active FR3024541B1 (en) | 2014-07-31 | 2014-07-31 | ARRANGEMENT OF A PRESSURE MEASURING DEVICE ON AN EXHAUST LINE COMPRISING A PARTICLE FILTER |
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003042885A (en) * | 2001-07-31 | 2003-02-13 | Nippon Soken Inc | Pressure detecting structure |
WO2006059219A1 (en) * | 2004-12-02 | 2006-06-08 | Toyota Jidosha Kabushiki Kaisha | Exhaust gas control apparatus |
JP2007023996A (en) * | 2005-07-21 | 2007-02-01 | Nissan Motor Co Ltd | Exhaust emission control device |
JP2009052494A (en) * | 2007-08-28 | 2009-03-12 | Toyota Industries Corp | Exhaust emission control device for internal combustion engine |
GB2492787A (en) * | 2011-07-12 | 2013-01-16 | Gm Global Tech Operations Inc | Exhaust pressure line for an internal combustion engine |
-
2014
- 2014-07-31 FR FR1457432A patent/FR3024541B1/en active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003042885A (en) * | 2001-07-31 | 2003-02-13 | Nippon Soken Inc | Pressure detecting structure |
WO2006059219A1 (en) * | 2004-12-02 | 2006-06-08 | Toyota Jidosha Kabushiki Kaisha | Exhaust gas control apparatus |
JP2007023996A (en) * | 2005-07-21 | 2007-02-01 | Nissan Motor Co Ltd | Exhaust emission control device |
JP2009052494A (en) * | 2007-08-28 | 2009-03-12 | Toyota Industries Corp | Exhaust emission control device for internal combustion engine |
GB2492787A (en) * | 2011-07-12 | 2013-01-16 | Gm Global Tech Operations Inc | Exhaust pressure line for an internal combustion engine |
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