EP3775526A1 - Vaporization-condensate-egr - Google Patents
Vaporization-condensate-egrInfo
- Publication number
- EP3775526A1 EP3775526A1 EP19713523.9A EP19713523A EP3775526A1 EP 3775526 A1 EP3775526 A1 EP 3775526A1 EP 19713523 A EP19713523 A EP 19713523A EP 3775526 A1 EP3775526 A1 EP 3775526A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cooler
- gases
- gas circuit
- condensates
- engine
- 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- Withdrawn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
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
- F02M26/02—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
- 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
-
- 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
- F01N3/005—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for draining or otherwise eliminating condensates or moisture accumulating in the apparatus
-
- 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
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/0205—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust using heat exchangers
-
- 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
-
- 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
- F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
- F02M26/23—Layout, e.g. schematics
-
- 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
- F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
- F02M26/29—Constructional details of the coolers, e.g. pipes, plates, ribs, insulation or materials
- F02M26/30—Connections of coolers to other devices, e.g. to valves, heaters, compressors or filters; Coolers characterised by their location on the engine
-
- 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
- F02M26/35—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with means for cleaning or treating the recirculated gases, e.g. catalysts, condensate traps, particle filters or heaters
-
- 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
- F02B29/045—Constructional details of the heat exchangers, e.g. pipes, plates, ribs, insulation, materials, or manufacturing and assembly
- F02B29/0468—Water separation or drainage means
-
- 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 a motor vehicle engine.
- the present invention relates to an exhaust system of burnt gas engine.
- the present invention more particularly relates to a device for managing and removing condensates in a heat engine exhaust line.
- a combustion engine of a motor vehicle is equipped with pollution control systems to reduce the release of pollutants outside the vehicle.
- Said pollution control systems are arranged in the exhaust line of the engine and comprise a catalyst or a particulate filter.
- the exhaust line of an engine is the whole circuit of the flue gases from the engine from exhaust valves.
- high-pressure recirculated gases taken from the upstream exhaust circuit according to the direction of flow of the gases of pollution control devices such as, for example, a nitrogen oxide catalyst or trap (NOx).
- the high pressure recirculated flue gases are taken directly from an exhaust manifold attached to an exhaust face of the cylinder head, the lateral side opposite the intake face.
- the high-pressure recirculated gases are then sent to the intake ducts or the intake manifold.
- recirculated low pressure burnt gases taken from the exhaust system and in a known manner after a depollution device. Said recirculated low pressure gases are returned in known manner in the intake circuit upstream of the compressor. They are then mixed with fresh air captured on the front of the vehicle.
- blow-by gases or oil vapors taken from a decanter generally fixed to the cylinder head The oil vapors generated by the operation of the engine thus pass through the decanter where they are largely free of oil that falls to an oil pan fixed in the lower part of the crankcase.
- the remaining gases are reinjected into the intake circuit, particularly at the intake distributor. Said gases may still contain oil.
- the recirculated low pressure flue gases are therefore taken downstream of an exhaust system and returned to the engine intake.
- the recirculated gases are cooled before being mixed with fresh air captured on the front of the vehicle for example, said mixture is then likely to be compressed at the passage of a compressor.
- Condensates are likely to form in the low-pressure flue gas recirculation circuit, in particular when the engine is stopped. Said condensates can be formed of water, oil and toxic and corrosive discharges. They can then be conveyed in liquid form when starting the engine to the compressor and damage the wheel of said compressor.
- the publication EP2375047-A2 thus has a device for reducing corrosive compounds in an exhaust gas condensate of an internal combustion engine, in which the exhaust gases of the internal combustion engine are brought back to the internal combustion engine by via an exhaust gas return duct composed of an exhaust gas cooler and at least one exhaust gas recirculation duct.
- the device relates to a recirculation circuit of high pressure recirculated gases which are taken from an exhaust manifold to be reintroduced to the inlet of the engine.
- the device also includes a unit for neutralizing the corrosive compounds of the exhaust gas condensate arranged downstream of the flue gas recirculation circuit and through which the exhaust gases pass.
- the device can be complex and adds extra weight to the engine
- the object of the invention is to remedy these problems and one of the objects of the invention is a simple device for managing the condensates formed during the stopping of the engine, downstream of a depollution device arranged on a line of engine exhaust
- the present invention more particularly relates to a low-pressure recirculated flue gas circuit of a motor vehicle engine comprising:
- a depollution device arranged upstream according to the direction of circulation of the gases
- said cooler comprises a condensate control circuit arranged at a downstream end of the cooler.
- a control circuit of the condensates generated is arranged at a downstream end of the cooler which is the formation zone of said condensates, to allow the collection, removal and removal of the condensates contained in the recirculated gases and in a crankcase. cooler and thus avoid pollution of a compressor wheel to which the recirculated gases are directed after their passage through the cooler.
- the condensates control circuit comprises means for collecting the condensates arranged at the downstream end of the cooler housing.
- control circuit comprises means for collecting condensates from the recirculated gases.
- Said means are arranged in the cooler housing and at a downstream end of said cooler to allow optimal collection of said condensates.
- the collection means comprise a collection wall arranged at a downstream end of the cooling device and towards which the recirculated gases are directed, and a collection bag arranged at the foot of said collection wall.
- the condensate collection means comprise at least one collection wall arranged at a downstream end of the cooling device and towards which the recirculated gases are directed. Said recirculated gases abut against the collection wall to allow separation and collection of pollutants, the condensates are able to flow by gravity along the collection wall to the collection bag arranged at the foot of said wall.
- the condensates control circuit comprises a condensate retention tank.
- control circuit comprises a retention tank for holding the condensates, especially in case of stopping the engine.
- the retention tank is connected with the collection bag of the cooling device via a storage pipe.
- the condensate tank is connected with the condensate collection bag in the cooler housing by a storage conduit, which optimally arranges said tank.
- the storage duct has a continuous slope.
- the storage pipe has a continuous slope between the condensate collection bag and the retention tank which is therefore arranged at the lowest level of the condensate control circuit to facilitate the flow of condensates to the tank.
- the gas cooler comprises a deflector arranged at a downstream end of said device to hide the outlet of the storage duct.
- the recirculated gas cooler comprises a deflector for concealing the outlet of the storage duct in the cooler housing and more particularly the recirculated gas collection bag so as not to disturb the operation of the cooler and the passage of the burnt gas.
- the retaining reel is arranged in contact with the depollution device.
- the retention tank is arranged in contact with the depollution device in order to take advantage of the high temperatures of the exhaust gases which will allow vaporization of said condensates and then their removal.
- the retention tank is connected with a mouthpiece for discharging the gases from the cooler via a purge duct.
- the retention tank is connected with a mouth of the outlet of the cooler gases by a purge duct to allow evacuation of the vapors generated by the residues in contact with the depollution device.
- the retention tank it is appropriate to arrange the retention tank as close to the pollution control device which may be at an elevated temperature above 100 ° C generally above 300 ° C.
- the retention tank then has a so-called hot wall vis-à-vis the pollution control device which may be at an elevated temperature also higher than 100 ° C to allow the vaporization of condensates.
- condensates in liquid form in contact with the hot wall can then turn into vapors and up the purge duct to the outlet mouth of the cooler.
- this duct has a continuous slope.
- the purge duct has a continuous slope to facilitate the evacuation of vapors from the condensate.
- FIG 1 is a schematic view of the engine with the elements of the gas circuit.
- FIG 2 is a schematic sectional view of the recirculated low pressure gas circuit successively comprising a pollution control device and a gas cooler recirculated with the flow direction of said gas.
- up / down are relative to a vertical axis orthogonal to a horizontal plane which may be the plane of the vehicle (not shown) passing through the axles of the vehicle wheels.
- upstream / downstream terms are relative to the flow direction of the flue gases in the gas recirculation circuit.
- a powertrain of a motor vehicle such as for the invention may comprise a heat engine with accessories for improving the performance of said engine or to ensure the operation of the engine, said accessories comprise for example a turbocharger with a stage turbine and a compressor stage, a gas cooler, a water / gas heat exchanger.
- the engine 10 of the motor vehicle (not shown) comprises a recirculated flue gas circuit 11 taken from the engine exhaust 14 to return them to the intake 13 of the engine 10 in order to reduce pollutant discharges.
- Two recirculated gas circuits can be seen: a first circuit of high-pressure burnt gases which are taken from the exhaust manifold of the engine and brought directly to the intake of said engine,
- a second recirculated gas circuit 16 called low pressure that is taken from or downstream of a pollution control device 12.
- Said pollution control device may be a particulate filter or a catalyst or a NOx trap for nitrogen oxide.
- the flue gases then pass through a gas cooler which may be a water / gas heat exchanger to be successively directed to an intake duct 17 for fresh air to be mixed with fresh air from a collection generally from the front face of the vehicle, a compressor 18, another heat exchanger 19 before reaching the intake face of the engine and the intake ducts (not shown) leading to the cylinders of said engine.
- the pollution control device 12 comprises a decontamination casing 20 surrounding a bread 21 depollution.
- the recirculated gases are at high temperature and pass through the decollution bread to reach a cooler 22 to lower their temperature before mixing with the fresh air.
- the cooler 22 is generally a water / gas heat exchanger and comprises a cooler housing 23 surrounding cylindrical tubes 24 immersed in a volume of water 25 fed by an inlet nozzle 26 and an outlet nozzle 27, said two endpieces are connected to a water-based cooling circuit (not shown) of the engine.
- the cylindrical tubes 24 pass the recirculated gases to give some of their heat to the water.
- the gases strike at a downstream end 31 a wall 28 of a funnel leading to the outlet mouth 29 of the cooler 22.
- the cooler comprises a condensates control circuit 40 for collecting, storing, and removing said condensates.
- the control circuit 40 includes means for collecting the condensates.
- Said means comprise the wall 28 at the downstream end which has an inclined surface and a collection bag 33 arranged at the bottom of the collection wall 28.
- Said collection bag may be for example a recess dug in the lower wall 34 of the housing 23 of cooler.
- a deflector 35 which may be a sheet of material with the cooler housing 22. Said deflector 35 conceals the collection bag 33 for the recirculated gas. Said recirculated gases are thus directed at the outlet of the cylindrical tubes towards the collection wall at the downstream end, and above the collection bag 33.
- the control circuit also comprises a retention tank 41 of the condensates.
- Said tank is preferably arranged in abutment against the wall of the casing 20 of the depollution device 12 and in the lower position relative to the cooler 22.
- a storage duct 42 connects the casing 23 of the cooler 22 to the holding tank 41. More precisely, the storage duct opens at a first end into the collection bag 33 of the casing 23 and at the opposite end in the tank 41.
- the storage duct has a continuous slope and the retention tank is thus arranged at the bottom of the casing 2 "and the storage duct.
- continuous slope is meant the fact that the storage conduit does not have a bend that can form another retention pocket. The condensates can thus flow by gravity from the collection bag 33 to the holding tank 41.
- the control circuit also includes a purge duct 43 which connects the holding tank 41 to the outlet mouth 29 of the cooler.
- the purge duct 43 also has a continuous slope. The purge duct 43 thus opens to a first end in the cooler housing 23 and the second opposite end in the holding tank 41 and preferably near the neck of the cooler outlet funnel 22.
- control circuit The operation of the control circuit is as follows:
- the recirculated gases generate condensates which are collected on the inclined wall 28 at the downstream end of the cooler 22.
- the condensates in liquid form flow on this inclined wall until to the collection bag 33 passing under the baffle 35.
- the condensates enter the storage conduit 42 to be directed to the retention tank 41 by gravity.
- the exhaust gases are at high temperature and cause the temperature of the pollution control casing 20 to rise.
- the retention tank in contact with said casing also rises in temperature, which is greater than 100 ° C.
- the condensates in the holding tank turn into steam and are redirected through the bleed pipe 42 to the outlet mouth 29 of the cooler housing 23.
- the vapors are then mixed with the recirculated gases in the flue gas recirculation circuit to be finally removed in one of the combustion chambers of the engine.
- the purge duct 43 is arranged above and parallel to the storage duct 42.
- the purge duct 43 is merged with the storage duct 42.
- the low-pressure recirculated flue gas circuit includes a condensate control circuit formed in the cooler housing when the engine is shut down.
- Said control circuit makes it easy to store the condensates during engine shutdown and then remove them during operation of the engine to avoid the risk of pollution of the compressor wheel.
- the invention is not limited to the embodiments of this plug, described above as examples, it encompasses all variants. It is thus possible to add an electric heating element to ensure rapid and optimal removal of the condensates in the holding tank for example in cold weather.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Exhaust-Gas Circulating Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1852960A FR3079881B1 (en) | 2018-04-05 | 2018-04-05 | VAPORIZATION-CONDENSATES-EGR |
PCT/EP2019/058318 WO2019193014A1 (en) | 2018-04-05 | 2019-04-02 | Vaporization-condensate-egr |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3775526A1 true EP3775526A1 (en) | 2021-02-17 |
Family
ID=62143410
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19713523.9A Withdrawn EP3775526A1 (en) | 2018-04-05 | 2019-04-02 | Vaporization-condensate-egr |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3775526A1 (en) |
FR (1) | FR3079881B1 (en) |
WO (1) | WO2019193014A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3109605B1 (en) * | 2020-04-28 | 2022-04-08 | Renault Sas | Condensate siphon-EGR |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7131263B1 (en) * | 2005-11-03 | 2006-11-07 | Ford Global Technologies, Llc | Exhaust gas recirculation cooler contaminant removal method and system |
FR2919349A3 (en) * | 2007-07-24 | 2009-01-30 | Renault Sas | Charge air cooler for e.g. oil engine of motor vehicle, has liquid retention capacity placed adjacent to enclosure volume and collecting liquid accumulated in enclosure volume during functioning of cooler |
DE102009022986A1 (en) * | 2009-05-28 | 2010-12-02 | Behr Gmbh & Co. Kg | Heat exchanger |
US9010112B2 (en) * | 2009-10-27 | 2015-04-21 | Ford Global Technologies, Llc | Condensation trap for charge air cooler |
DE102010003864A1 (en) | 2010-04-12 | 2011-11-24 | Behr Gmbh & Co. Kg | Device for reducing corrosive components in an exhaust gas condensate of an internal combustion engine |
DE102010048466A1 (en) * | 2010-10-14 | 2012-04-19 | Daimler Ag | Exhaust gas recirculation with condensate discharge |
US9027341B2 (en) * | 2011-07-18 | 2015-05-12 | Ford Global Technologies, Llc | System for a charge-air-cooler |
JP6314400B2 (en) * | 2013-09-30 | 2018-04-25 | 三菱自動車工業株式会社 | Condensate separator |
-
2018
- 2018-04-05 FR FR1852960A patent/FR3079881B1/en active Active
-
2019
- 2019-04-02 WO PCT/EP2019/058318 patent/WO2019193014A1/en active Application Filing
- 2019-04-02 EP EP19713523.9A patent/EP3775526A1/en not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
FR3079881B1 (en) | 2020-11-13 |
WO2019193014A1 (en) | 2019-10-10 |
FR3079881A1 (en) | 2019-10-11 |
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