EP3482057A1 - Moteur avec recirculation optionnelle de gaz d'échappement - Google Patents
Moteur avec recirculation optionnelle de gaz d'échappementInfo
- Publication number
- EP3482057A1 EP3482057A1 EP17740431.6A EP17740431A EP3482057A1 EP 3482057 A1 EP3482057 A1 EP 3482057A1 EP 17740431 A EP17740431 A EP 17740431A EP 3482057 A1 EP3482057 A1 EP 3482057A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cylinder head
- recirculation
- duct
- exhaust
- egr
- 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- Withdrawn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
- 238000002485 combustion reaction Methods 0.000 claims abstract description 11
- 239000007789 gas Substances 0.000 claims description 47
- 238000000034 method Methods 0.000 claims description 17
- 238000003754 machining Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 5
- 229910001018 Cast iron Inorganic materials 0.000 claims description 4
- 238000005266 casting Methods 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 229910001208 Crucible steel Inorganic materials 0.000 claims description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 12
- 238000010586 diagram Methods 0.000 description 4
- 238000004026 adhesive bonding Methods 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000003134 recirculating effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/24—Cylinder heads
-
- 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
- F02B69/00—Internal-combustion engines convertible into other combustion-engine type, not provided for in F02B11/00; Internal-combustion engines of different types characterised by constructions facilitating use of same main engine-parts in different types
-
- 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
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/005—Plugs
-
- 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
- F02M26/41—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories characterised by the arrangement of the recirculation passage in relation to the engine, e.g. to cylinder heads, liners, spark plugs or manifolds; characterised by the arrangement of the recirculation passage in relation to specially adapted combustion chambers
Definitions
- the invention relates to an internal combustion engine with an optional recirculation of exhaust gas, that is to say, allowing adaptation to such engine recirculation for equipping a motor vehicle.
- Such an engine implements optional means of exhaust gas recirculation to move from a so-called “closed” state to recycling to a state called “open” to recycling, depending on the intended destination for this engine.
- the antipollution standards induce an increased need for exhaust gas recirculation systems known as EGR (acronym for "Exhausted Gas Recirculation” in English terminology) and / or catalyst systems for limiting the oxides of nitrogen and soot (including for example particle filters).
- EGR exhaust gas recirculation systems
- catalyst systems for limiting the oxides of nitrogen and soot (including for example particle filters).
- the invention relates to the use of EGR recirculation systems.
- Exhaust gas recirculation is a known technique for cleaning up internal combustion engines by re-circulating the exhaust gas at the intake in order to reduce the nitrogen oxides. More specifically, this technique consists in reinjecting part of the exhaust gas containing NOx nitrogen oxides (N0 2, N0 3, N 2 0) in the engine combustion chambers. The oxygen content required for combustion is then reduced and the combustion temperature reduced because the nitrogen oxides have a higher heat capacity than oxygen, which reduces overall the amount of NOx produced as well as their emission.
- the proportion of the exhaust gas recirculated is adapted to each engine and to each operating regime in order to respect the balance between the emissions of nitrogen oxides and particles.
- EGR valve In order to inject the intake a specific amount of gas taken from the exhaust according to the operating conditions of the engine at each moment, a valve called EGR valve is controlled by the engine computer.
- the EGR valve closes or opens the line connecting the exhaust gas manifold to the gas intake manifold in the engine.
- Various embodiments of this EGR recirculation technique have been developed, for example by choosing a recirculation of the exhaust gas externally to the cylinder head or internally to this cylinder head.
- Another option relates to the high or low pressure of recirculating gases in connection with a turbocharger turbine arranged at the outlet of the exhaust manifold of the cylinder head.
- the recirculation is carried out by taking the gas upstream of the turbine, and by re-injecting it into the compressed air by the compressor downstream of this compressor.
- the recirculation is carried out by sampling gases downstream of the turbine to reinject them into the air upstream of the supercharging air compressor.
- Low pressure recirculation requires a longer circuit than high pressure recirculation and requires the installation of a particulate filter upstream of the sample. This filter prevents premature wear of the compressor and ensures a recycling of particulate free gases.
- EGR recirculation makes it possible to limit the emission of gaseous pollutants and compliance with the anti-pollution standards of certain countries, but the recirculation circuit tends to become fouled by excess reinjected gas, which causes the release of black fumes. and engine fouling. As a result, EGR recirculation is not installed on all motor vehicles and the mandatory nature of this facility depends on national regulations on emission standards.
- the main purpose of the invention is therefore to propose, in a given engine, a base yoke that can easily be adapted according to engine demand with or without EGR recirculation.
- the invention provides a cylinder head internal EGR recirculation closed or not at the time of manufacture of the cylinder head.
- the subject of the present invention is an internal combustion engine equipped with a cylinder head comprising cylinder heads, each cylinder head being connected on the one hand to an air intake duct and, on the other hand, to an outlet duct belonging to a gas exhaust part in which the outlet ducts are joined to form an exhaust manifold.
- the cylinder head is traversed by an exhaust gas recirculation duct extending between an inner end formed in a wall of the exhaust part, and an outer end opening out of the cylinder head adapted to be connected to a circuit of recirculation in connection with the air intake ducts.
- the exhaust gas recirculation duct is obstructed by at least one plug arranged integrally with the duct.
- An advantage of a plug obstruction is to be easily removed and thus convert the cylinder head to a cylinder head adapted to an engine equipped with an EGR recirculation circuit.
- a stopper is arranged in at least one inner and outer end zone of the recirculation duct;
- the cap is made of a material selected from cast iron, steel and aluminum;
- the plug is secured to the conduit by a selected technology between welding, sintering and gluing;
- the cylinder head is formed of two adjoining blocks assembled mechanically, a cylinder block incorporating the cylinders and the inlet / outlet ducts and a manifold block incorporating the exhaust manifold, the recirculation duct passing through these two blocks.
- the invention also relates to a motor vehicle equipped with a motor as defined above, and to a method using such a motor. This process comprises the following steps:
- the cylinder head body is directed either towards an obstruction line of the exhaust gas recirculation duct by at least one plug and machining of this at least one plug, or towards a line of cylinder head outlet to be mounted on an EGR type gas recirculation engine.
- the method according to the invention can also be implemented with an initial plugging EGR conduit and, according to the order, the cylinder head body is directed either to a machining line of the at least one plug to remove it from the EGR conduit, to mount the cylinder head on an EGR type gas recirculation engine, either to the output line to be mounted on a motor without EGR recirculation.
- the cylinder head body is directed either to a machining line of the at least one plug to remove it from the EGR conduit, to mount the cylinder head on an EGR type gas recirculation engine, either to the output line to be mounted on a motor without EGR recirculation.
- the closure of the duct is made by machining material from the foundry at the inner and outer ends of the recirculation duct;
- the casting of the cylinder head is carried out either in a one-piece body or by assembling two separately molded blocks, a cylinder block incorporating the cylinder heads and the inlet / outlet ducts and a manifold block incorporating the exhaust manifold;
- the cylinder head and manifold blocks are assembled by a technique chosen between screwing, riveting and welding.
- FIG. 1 is a schematic view of a motor portion without EGR recirculation and having a cylinder head sectional view having a closed recirculation duct according to the invention
- FIG. 3 a logic diagram for implementing a method according to the invention.
- a body 1 of the motor cylinder head 10 is traversed by three cylinder heads 4 aligned in the plane "P" in which the cylinder head 10 is a sectional view .
- the cylinder heads 4 are connected to air intake ducts 2 and, in contrast, to exhaust outlet ducts 3.
- Each intake duct 2 is arranged between a cylinder head 4 and a distributor intake 20 common to the three intake ducts 2 and arranged out of the cylinder head 10.
- the ducts intake 2 enter the body 1 through an intake wall 2A.
- the exhaust outlet ducts 3 are arranged between the cylinder heads 4 and an exhaust manifold 30 disposed substantially in the cylinder head 1.
- the exhaust manifold 30 and its exhaust ducts 3 form an exhaust portion 31.
- the cylinder head 1 is also traversed by an exhaust gas recirculation duct 50, said EGR duct, having an inner end 51, formed in the wall of the exhaust portion 31 - the wall of a exhaust duct 3 in the illustrated example - and an outer end 52 opening out of the cylinder head body 1 by the inlet wall 2A.
- the EGR conduit 50 is obstructed by a plug 61 arranged in an end zone Z1 adjacent to the inner end 51 of the EGR conduit 50, and by a plug 62 arranged in an adjacent end zone Z2. at the outer end 52 of the EGR conduit 50.
- the plugs 61 and 62 are arranged in the foundry in the two end zones Z1 and Z2 of the EGR conduit. They are therefore advantageously made of the same metal as the cylinder head 10 and are then fused to the cylinder head body 10.
- these plugs 61 and 62 may be constituted by a metal or alloy different from that of the cylinder head 10, for example cast iron or steel if the cylinder head 10 is aluminum.
- the plugs can then be secured to the cylinder head 10 by sintering, welding or gluing using a glue resistant to high temperatures.
- the motor operation is provided here without EGR recirculation.
- the cylinder head 10 is connected to an intake circuit C A and an exhaust circuit C E as described below.
- the air (arrow F1) passes first into a filter 1 1 and then successively (arrow F2), via a conduit 13, in a compressor 14a of a turbocharger 14, a cooling exchanger 12 and in the inlet manifold 20 (arrow F3), before entering the air intake ducts 2.
- An adjustment valve 17 is inserted in the duct 13 to regulate the air intake flow rate .
- the cylinder head 10 'of the schematic view of Figure 2 shows the cylinder head 10 of Figure 1, this time formed of two contiguous assembled blocks - a cylinder block 1 A and a collector block 1 B - to facilitate operations demolding, as well as the intake circuits C A and exhaust C E of Figure 1.
- the cylinder head operates in EGR recirculation mode.
- the EGR conduit 50 is closed by no plug and is derived from the foundry of each of the blocks 1 A and 1 B.
- a recirculation circuit, said EGR circuit, 55 complements the treatment equipment exhaust gases by recirculation to the inlet distributor 20.
- the EGR circuit 55 comprises, besides the EGR conduit 50, an EGR valve 56 mounted at the outer end 52 of the conduit 50 and intended to regulate the flow of the recirculation gas coming from the EGR conduit 50. (arrow F4) in conjunction with a computer managing the engine.
- the EGR circuit 55 also comprises a recirculation duct 57 which connects the outer end 52 of the EGR duct 50 to the inlet distributor 20 via a heat exchanger 58 intended to lower the temperature of the recycled gas.
- the removal of the two plugs 61 and 62 makes it possible to transform a cylinder head intended for a motor without EGR recirculation into a cylinder head intended for a motor with EGR recirculation.
- An example of a method implementing a yoke as defined above comprises the following steps, as illustrated by the logic diagram of FIG. 3.
- the molding of a bolt body 10 is first made in FIG. casting from a mold in which fusible cores are arranged at dedicated locations to form volumes without material dedicated to equipment (step 100).
- This recirculation duct EGR 50 extends into the cylinder head 10 between its inner end 51 formed in an outlet duct wall 3 (or exhaust manifold 30) and its outer end 52 opening into the intake wall 2A (see Figure 1).
- the bolt body is directed:
- the cylinder head is intended to be mounted on a motor without EGR recirculation equipment (line 140);
- Another example of implementation of the method according to the invention comprises the following steps, as illustrated by the logic diagram of Figure 4.
- the molding steps 100 'and demolding 1 10' with melting then withdrawal of cores are conducted identically to those of the previous implementation, with the exception of the formation of plugs at the ends of the EGR conduit 50 (see Figure 1) from the molding step.
- the bolt body is directed:
- the cylinder head being intended to be mounted on an EGR gas recirculation engine (step 140');
- step 150 ' to a cylinder head output line to be mounted on a motor without gas recirculation (step 150 ').
- this implementation mode uses a final machining step 130 'while the previous implementation mode uses a final stopper step 130 to allow, in both cases, to choose between a mounting of cylinder head EGR recirculation or breech assembly without EGR recirculation.
- this cylinder head can also be used with an EGR duct clogged or not clogged.
- the cylinder head can be equipped with the number of cylinder heads adapted to the engine, for example between 2 and 8 or more.
- the plugs may be fixable by sintering or gluing.
- the material constituting the cap may be any material fixable on the cylinder head and able to withstand the conditions of heat and pressure of the medium where they are arranged, in particular cast iron, steel, aluminum or equivalent.
- the collector may be of a material different from that of the cylinder head, these materials being compatible for fixing the collector resistant to the operating conditions of the cylinder head.
- the invention applies to any type of engine, running on diesel or gasoline, installed in a motor vehicle, but also in a means of transport by rail, sea, in an industrial machine or in a fixed generator.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1656401A FR3053737B1 (fr) | 2016-07-05 | 2016-07-05 | Moteur avec recirculation optionnelle de gaz d’echappement |
| PCT/FR2017/051537 WO2018007703A1 (fr) | 2016-07-05 | 2017-06-14 | Moteur avec recirculation optionnelle de gaz d'échappement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3482057A1 true EP3482057A1 (fr) | 2019-05-15 |
Family
ID=57045115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP17740431.6A Withdrawn EP3482057A1 (fr) | 2016-07-05 | 2017-06-14 | Moteur avec recirculation optionnelle de gaz d'échappement |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3482057A1 (fr) |
| FR (1) | FR3053737B1 (fr) |
| WO (1) | WO2018007703A1 (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113107717A (zh) * | 2021-05-14 | 2021-07-13 | 宁波福士汽车部件有限公司 | 一种汽车egr换热管路 |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2584319Y2 (ja) * | 1993-12-22 | 1998-10-30 | ダイハツ工業株式会社 | 排気ガス再循環装置 |
| DE102004041958B4 (de) * | 2004-08-31 | 2017-01-19 | Deutz Ag | Hubkolbenbrennkraftmaschine mit 2- oder 4-Ventilzylinderkopf |
| DE102005040637A1 (de) * | 2005-08-27 | 2007-03-01 | Deutz Ag | Brennkraftmaschine |
| FR2892770B1 (fr) | 2005-10-28 | 2008-01-18 | Renault Sas | Dispositif de recirculation controlee des gaz brules d'un circuit egr a haute pression |
| JP2008045498A (ja) * | 2006-08-17 | 2008-02-28 | Mazda Motor Corp | エンジンのシリンダヘッド構造 |
| JP5240299B2 (ja) * | 2011-01-05 | 2013-07-17 | マツダ株式会社 | 自動車搭載用ディーゼルエンジン |
| DE112012003317B4 (de) * | 2011-08-10 | 2020-02-13 | Honda Motor Co., Ltd. | EGR-Vorrichtung für Verbrennungsmotor |
| FR2997953B1 (fr) | 2012-11-14 | 2016-01-08 | Rhodia Operations | Co-polyamide aliphatique/semi-aromatique bloc |
| CN104696117A (zh) * | 2015-01-15 | 2015-06-10 | 东风朝阳朝柴动力有限公司 | 紧凑式发动机废气再循环系统 |
-
2016
- 2016-07-05 FR FR1656401A patent/FR3053737B1/fr not_active Expired - Fee Related
-
2017
- 2017-06-14 EP EP17740431.6A patent/EP3482057A1/fr not_active Withdrawn
- 2017-06-14 WO PCT/FR2017/051537 patent/WO2018007703A1/fr not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| FR3053737A1 (fr) | 2018-01-12 |
| WO2018007703A1 (fr) | 2018-01-11 |
| FR3053737B1 (fr) | 2018-07-27 |
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