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
  • F02M26/13—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
  • 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
  • F02M26/02—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
• • 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
• • 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

Definitions

• Exhaust gas recirculation device of a motor vehicle engine and use of such a device
• the present invention relates to a device for recirculating the exhaust gas of a motor vehicle engine. It will find its applications, especially in diesel engines.
• EGR Exhaust Recirculated Gas
• this acidity is all the higher in the exhaust gas recirculation lines that, along these lines, the EGR are not yet mixed with other gases as they will be in following their journey to the engine where they will be mixed with outside air, generating more basic condensates.
• the invention proposes to overcome the aforementioned drawbacks and relates to an exhaust gas recirculation device of a motor vehicle engine comprising a first exhaust gas recirculation line, called the EGR line, a first heat exchanger. heat, provided on said EGR line to ensure cooling of the recirculated exhaust gas, and exhaust gas treatment means for limiting the pH of condensate from said gas.
• said processing means are provided upstream of said first exchanger according to the path of the exhaust gas and said exchanger comprises a heat exchange beam made of aluminum and / or aluminum alloy.
• said beam comprises components made of aluminum and / or aluminum alloy obtained by rolling,
• said exhaust gas treatment means comprise an oxidation catalyst for the exhaust gas
• said engine comprising an exhaust line of the engine, and said exhaust line comprising a turbine, adapted to be driven by said exhaust gas, said first EGR line is provided capable of communicating with said exhaust line upstream said turbine, said processing means being located along said first EGR line,
• said engine comprising an exhaust line, and said exhaust line comprising a turbine, capable of being driven by said gases exhaust, said first line EGR is provided capable of communicating with said exhaust line downstream of said turbine, said processing means being provided capable of being located along said exhaust line, in particular downstream of said turbine ,
• said device further comprises a second exhaust gas recirculation line, said second EGR line being able to communicate with the exhaust line upstream of said turbine,
• said device comprises a second heat exchanger provided on said second EGR line for cooling the recirculated exhaust gas passing through said second line,
• said second exchanger comprising a heat exchange bundle made of stainless steel
• said processing means are also provided along said second EGR line, upstream of said second exchanger, and said second exchanger comprises a heat exchange bundle made of aluminum and / or aluminum alloy.
• the invention also relates to the use of the device as described above with fuels of plant origin, European standard diesel and / or fuels from gas and / or coal. It has indeed been found that with these fuels the decrease in the acidity of the condensates obtained by employing the device according to the invention is all the more effective.
• FIG. 1 schematically illustrates a first exemplary embodiment of the device according to the invention
• FIG. 2 schematically illustrates a second exemplary embodiment of the device according to the invention
• FIG. 3 schematically illustrates a third embodiment of the device according to the invention.
• the invention applies, for example, to a vehicle engine 1 having an air intake line 2 and / or an exhaust line 3.
• the intake line 2 allows supply the engine with intake air, especially fresh air.
• the exhaust line 3 makes it possible to evacuate the exhaust gases generated by the combustion occurring in the combustion chambers 4 of the engine, by reacting the intake air with the fuel introduced into the chambers.
• the engine comprises, for example, an intake manifold 5, distributing the intake air from the intake line 2 into the combustion chambers 4, and an exhaust manifold 5 ', collecting the exhaust gas. exhaust from the combustion chambers 4 to direct them to the exhaust line 3.
• turbo compressor 6 for compressing the intake air from the kinetic energy of the exhaust gas running through the exhaust line 3.
• Said turbo compressor comprises, for example, a turbine 7, adapted to be driven by said exhaust gas, and / or a compressor 8, driven by said turbine 7 and intended to compress the intake air passing through the intake line 2.
• the turbine 7 is thus provided at the level of the exhaust line 3 and the compressor 8 is provided at the intake line 2, the turbine 7 and the compressor 8 being mechanically connected to each other for the drive of the compressor 8 by the turbine 7 .
• the intake line 2 may include a charge air cooler 12, for cooling the supply air flowing through it, before its introduction into the engine 1.
• Said supply air cooler 12 is provided downstream of the compressor 8.
• the exhaust line 3 may include a particulate filter 13 to reduce the pollutant emissions from the exhaust gas. Said particulate filter 13 is provided downstream of the turbine 7.
• the device according to the invention comprises a first exhaust gas recirculation line 9, called the EGR line, and a first heat exchanger 10, provided on said EGR line, for cooling the recirculated exhaust gas.
• Said EGR line opens at the intake line 2.
• the flow of recirculated exhaust gas and / or intake air is provided through various valves.
• Said heat exchanger 10 is, for example, an exchanger, said water, for ensuring a heat exchange between a coolant, including brine, from a cooling loop of the vehicle, and the exhaust gas.
• the exchanger comprises for this a heat exchange beam, not detailed, defining a first circuit for the coolant and a second circuit for the recirculated exhaust gas, said first and second circuits being in heat exchange relationship .
• heat exchange bundle is thus meant, in particular, all the components of the beam being in contact with the exhaust gas passing through the exchanger.
• the device according to the invention further comprises means 1 1 for treating the exhaust gas, for limiting the pH of condensate from said gas.
• said processing means 1 1 are provided upstream of said first exchanger 10, according to the path of the exhaust gas, and the heat exchange bundle of said exchanger is made of aluminum and / or aluminum alloy . Indeed, by providing such downstream processing means, it is no longer necessary to use stainless steel components for the exchanger. It is therefore possible to use aluminum, which favors obtaining improved thermal performance and a reduction in costs.
• the beam of the exchanger can thus comprise plates made of such a material, said plates being stacked to define blades for circulating gases. Alternating exhaust with coolant circulation blades.
• the exhaust gas treatment means 11 comprise, for example, an exhaust gas oxidation catalyst, also known as a two-way catalyst. Such a catalyst makes it possible to oxidize unburnt hydrocarbons to carbon dioxide and water.
• said first EGR line 9 is provided capable of communicating with said exhaust line 3 upstream of said compressor 7. Said processing means 11 are then located, for example, the along this first EGR line 9. In this mode, the EGR line opens into the intake line 2, for example, downstream compressor 8, see supply air cooler 12.
• said first EGR line 9 is provided capable of communicating with said exhaust line 3 downstream from said turbine 7, see particulate filter 13.
• Said means for treatment 1 1 are then located, for example, along said exhaust line 3, in particular downstream of said turbine 7, for example upstream of the particulate filter 13.
• the three-way catalyst therefore processes all the exhaust gas having passed through the turbine 7.
• the EGR line 9 opens into said intake line, for example, upstream of the compressor 8.
• no other EGR line is provided.
• a second line 14 of recirculation of the exhaust gas Said second EGR line is provided capable of communicating with the exhaust line 3 upstream of said turbine 7.
• a second heat exchanger 15 is provided on said second EGR line 14 for cooling the recirculated exhaust gas passing through said second line. 14. The latter leads into the admission line, through for example, downstream of the compressor 8, see the supply air cooler 12.
• said second exchanger 15 comprises a heat exchange bundle made of stainless steel.
• processing means 11, in particular a second two-way catalyst, along said second EGR line 14, upstream of said second exchanger 15 are also provided.
• Exchanger 15 then comprises a heat exchange bundle made of aluminum and / or aluminum alloy.
• the invention also relates to the use of the device described above with fuels of vegetable origin, in particular fuel based on soybean oil, palm or rapeseed or fuels derived from biomass. It may also be European standard diesel, including diesel with 10 ppmS, or fuels from gas or coal.

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)
• Air-Conditioning For Vehicles (AREA)
• Supercharger (AREA)

Applications Claiming Priority (2)

Publications (1)

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Family Applications (1)

Country Status (6)

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Citations (1)

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• 2010
  • 2010-06-30 FR FR1002778A patent/FR2962164B1/fr not_active Expired - Fee Related
• 2011
  • 2011-06-17 EP EP11725759.2A patent/EP2588738A1/fr not_active Withdrawn
  • 2011-06-17 US US13/807,428 patent/US20130298536A1/en not_active Abandoned
  • 2011-06-17 WO PCT/EP2011/060132 patent/WO2012000811A1/fr active Application Filing
  • 2011-06-17 KR KR1020127034226A patent/KR20130124176A/ko not_active Application Discontinuation
  • 2011-06-17 JP JP2013517160A patent/JP2013530347A/ja active Pending
• 2015
  • 2015-07-21 US US14/805,182 patent/US9957923B2/en active Active
• 2016
  • 2016-06-02 JP JP2016110793A patent/JP2016191383A/ja active Pending

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Non-Patent Citations (1)

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