EP2861844A1 - Systeme de collecte et d'epuration de gaz d'echappement - Google Patents
Systeme de collecte et d'epuration de gaz d'echappementInfo
- Publication number
- EP2861844A1 EP2861844A1 EP13727250.6A EP13727250A EP2861844A1 EP 2861844 A1 EP2861844 A1 EP 2861844A1 EP 13727250 A EP13727250 A EP 13727250A EP 2861844 A1 EP2861844 A1 EP 2861844A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- catalyst
- collector
- hemispherical
- shells
- outlet
- 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
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
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features
- F01N13/08—Other arrangements or adaptations of exhaust conduits
- F01N13/10—Other arrangements or adaptations of exhaust conduits of exhaust manifolds
-
- 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
- F01N13/18—Construction facilitating manufacture, assembly, or disassembly
- F01N13/1888—Construction facilitating manufacture, assembly, or disassembly the housing of the assembly consisting of two or more parts, e.g. two half-shells
Definitions
- the present invention relates to exhaust devices of an internal combustion engine.
- the invention more particularly relates to the combination of an exhaust manifold with a catalyst.
- the invention also relates to an internal combustion engine comprising an exhaust device.
- Exhaust gas purification devices disposed downstream in the direction of the flow of the gases of the engine block and which comprise a collector and a catalyst are known.
- the manifold has an upstream portion of the engine side with a plurality of gas inlet conduits connected with the engine outlet ducts and a downstream portion connected with a catalyst.
- the catalyst is positioned as close to the manifold as to keep the advantage of the hot gases.
- the catalyst is composed of a monolith surrounded by metal walls. The gases are diffused homogeneously through the monolith so as not to degrade the valuable components of said monolith and to obtain an optimal reaction. At the inlet of the catalyst part, there is therefore a chamber for mixing the gases from the engine and a diffuser portion to regulate the flow through the monolith.
- the publication FR2777320 discloses a collector having a cavity and an end portion having substantially the shape of a bowl.
- the shape of the bowl facilitates the uniformization of the exhaust gases before entering the catalyst.
- a relative disadvantage of this collector is its manufacturing method obtained by molding, resulting in a relatively high cost for small engines.
- Another disadvantage relates to the dimensions of said manifold whose chamber is a volume between 0.8 times and 1.5 times the engine displacement, which is important for small engines.
- An object of the invention is to overcome these drawbacks and the invention relates to a gas cleaning system in one piece whose manufacturing cost is low.
- the object of the invention relates more particularly to obtaining the system for collecting and purifying gases of a small footprint composed of a collector and a catalyst obtained by stamping and welding, and assembled in one piece .
- the collector comprises a substantially hemispherical gas outlet at the periphery of a circular opening and in that the catalyst comprises a substantially hemispherical inlet fitted to said hemispherical outlet of the collector, the collector and the catalyst being derived from the assembly half-shells obtained by stamping.
- the collector is composed of a first upper half-shell and a second lower shell, each having a connecting edge disposed on a plane and the lower half-shell comprising the substantially hemispherical outlet of the collector,
- the two half-shells of the collector are assembled to one another by an edge-to-edge weld along the connecting edge,
- the catalyst comprises a median plane of symmetry comprising the axis of the hemispherical inlet
- the catalyst is composed of two half-shells, each having a connecting sidewalk arranged on a median plane of symmetry,
- the two half-shells of the catalyst are assembled to one another by a weld along the connecting sidewalk,
- the collector and the catalyst are steel parts
- the hemispherical outlet of the collector is pressed into the hemispherical inlet of the catalyst, the two parts are fixed to each other by a weld bead at the end of the hemispherical inlet of the catalyst.
- Figure 1 is a perspective view of the exhaust gas collection and purification system.
- Figure 2 is a sectional view along the plane BB of Figure 1 of the collector and the upper part of the catalyst.
- Figure 3 is a perspective view of half-shells forming the collector according to one embodiment.
- Figure 4 is a perspective view of half-shells forming the collector according to another embodiment.
- Figure 5 is a perspective view of half-shells forming the catalyst.
- the elements are described with respect to a substantially vertical axis Z, from a top associated with the exhaust gas collection zone at the outlet of the engine to a low outlet of the catalyst.
- the system 10 for collecting and cleaning the exhaust gases of an engine is composed according to FIG. 1 of a manifold 11 and a catalyst 12 attached downstream of the manifold in the direction of gas flow.
- the collector 1 1 is represented here with three collection branches intended to be fixed to the exhaust duct outlets of the engine (not shown), here a three-cylinder engine.
- the collector comprises tubes 14 for collecting gases and a gas outlet chamber 13 connected with a catalyst 12.
- the catalyst is preferably arranged closer to the outlet of the collector in order to take advantage of the heat of said exhaust gases. to have the different chemical actions inside the catalyst.
- the collector is composed of gas collection branches formed substantially by tubes of substantially the same diameter which open into the substantially cylindrical chamber 13 extended by a bottom portion of substantially hemispherical convex shape in which is formed a circular opening intended to open into the chamber. catalyst inlet 12.
- the collector 1 1 is composed of two half-shells 16a, 16b according to a sectional plane P1 substantially median relative to the collection tubes 14 and carried by the axes of said tubes.
- a first upper half-shell 16a thus comprises half-tubes 14a connected together in a substantially cylindrical cavity 17a having an opening 18 for a tapping for an oxygen sensor (not shown).
- a second lower half-shell 16b includes half-tubes
- the substantially hemispherical portion 15 allows a mixture of the exhaust gas at the outlet of the collector January 1 before their entry into the catalyst 12.
- the two half-shells 16a, 16b of the collector 1 1 are obtained by stamping a stainless steel plate and brought into contact by the lateral edges 20a, 20b of the half-tubes 14a, 14b and cylindrical cavities 17a, 17b and then welded. together.
- the lateral edges 20b of the half-tubes 14b and of the substantially cylindrical cavity 17b of the lower half-shell 16b project slightly over the upper half-shell 16a so that a part of the upper half-shell is covered by a portion of the lower half-shell 16b once the two half-shells 16a, 16b brought into contact and assembled. The welding can then be performed between the two half-shells.
- the catalyst 12 is composed of a casing 21 surrounding a catalytic monolith, said monolith (not shown) being formed of pipes disposed along a longitudinal axis of a honeycomb structure made of ceramic.
- the envelope 21 of the catalyst 12 is formed of two half-shells 29a, 29b substantially symmetrical with respect to the plane of symmetry P2.
- the lateral edges 30a, 30b of said half-shells 29a, 29b are extended by a connecting sidewalk 31a, 31b located in the plane of symmetry P2.
- the two half-shells 29a, 29b are obtained by stamping from a stainless steel plate and brought into contact by the connecting sidewalks 31a, 31b previously gripping the catalytic monolith and then welded together by a weld seam along the sidewalks. link.
- Said envelope 21 is composed of a circular inlet opening 22 for the gases coming from the collector, a second substantially cylindrical portion 32 surrounding the catalytic monolith and a gas outlet 23 composed of a reduction of section 24 and a substantially tubular output member 25.
- the inlet 22 of the gases in the catalyst comprises a substantially hemispherical portion 26 fitted to the hemispherical outlet 15 of the collector January 1 so as to extend substantially over said outlet of the collector, which allows easy orientation of the catalyst January 1 according to the constraints of arrangement of said catalyst near the engine (not shown).
- the circular opening of the substantially spherical portion 26 opens into a diffusion portion 28, without the need to pass through a tubular element, which also allows a reduction in the size of the catalyst 12.
- the axis CC of the substantially tubular outlet member 25 is included in a plane of symmetry P2 defined by the axis AA of the cylinder of the portion 32 surrounding the monolith and by the axis DD of the portion substantially hemispherical 26 gas inlet.
- the catalyst 12 for example relates to small three-cylinder engines of a cylinder capacity substantially less than or equal to 1 liter, the catalytic monolith is substantially cylindrical with a volume of the order of one liter with a diameter of the order of 10cm and extends over a length of the order of 10cm.
- the collector 1 1 and the catalyst 12 are brought into contact with each other: the hemispherical outlet 15 of the collector is pressed into the substantially hemispherical inlet 26 of the catalyst.
- the two parts are then welded together by a weld bead along the cylindrical edge of the catalyst.
- the spherical connection between the outlet 15 of the collector and the inlet 26 of the catalyst makes it possible to obtain an inclination of the axis of the hemispherical outlet 15 of the collector with respect to the longitudinal axis AA of the catalyst which may vary between 0 and 45 degrees. .
- the clearance remains constant between the hemispherical portion of the outlet 15 of the collector and the hemispherical portion 26 of the catalyst inlet and a weld is possible. This allows a simple adaptation of the system according to the invention to different engines.
- the collector and the catalyst are easy to manufacture and inexpensive and the size of the exhaust gas collection and purification system is reduced.
- the invention is not limited to the embodiments presented above but the skilled person will know bring any variant that fits his mind, especially in assembly techniques.
- the half-shells composing the collector may comprise a sidewalk along the side edges 20a, 20b of the half-tubes and the cavity, the weld can be made at said sidewalk.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1255301A FR2991714B1 (fr) | 2012-06-07 | 2012-06-07 | Systeme de collecte et d'epuration de gaz d'echappement |
| PCT/FR2013/050991 WO2013182770A1 (fr) | 2012-06-07 | 2013-05-03 | Systeme de collecte et d'epuration de gaz d'echappement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2861844A1 true EP2861844A1 (fr) | 2015-04-22 |
| EP2861844B1 EP2861844B1 (fr) | 2016-07-13 |
Family
ID=47080630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP13727250.6A Active EP2861844B1 (fr) | 2012-06-07 | 2013-05-03 | Système de collecte et d'épuration de gaz d'échappement |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2861844B1 (fr) |
| FR (1) | FR2991714B1 (fr) |
| IN (1) | IN2014DN10435A (fr) |
| WO (1) | WO2013182770A1 (fr) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2777320B1 (fr) | 1998-04-09 | 2000-09-22 | Renault | Collecteur d'echappement pour moteur a combustion interne |
| JP4240428B2 (ja) * | 1999-06-08 | 2009-03-18 | 電気化学工業株式会社 | 触媒コンバータのシール材の製造方法 |
| DE19938689A1 (de) * | 1999-08-14 | 2001-02-15 | Volkswagen Ag | Abgassammelrohr aus Blech für mehrzylindrige Verbrennungsmotoren |
-
2012
- 2012-06-07 FR FR1255301A patent/FR2991714B1/fr active Active
-
2013
- 2013-05-03 EP EP13727250.6A patent/EP2861844B1/fr active Active
- 2013-05-03 WO PCT/FR2013/050991 patent/WO2013182770A1/fr not_active Ceased
- 2013-05-03 IN IN10435DEN2014 patent/IN2014DN10435A/en unknown
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2013182770A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2013182770A1 (fr) | 2013-12-12 |
| FR2991714A1 (fr) | 2013-12-13 |
| IN2014DN10435A (fr) | 2015-08-21 |
| FR2991714B1 (fr) | 2017-06-09 |
| EP2861844B1 (fr) | 2016-07-13 |
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