EP3303798A1 - Ensemble moteur turbocompressé a deux conduits d'échappement et vanne de régulation - Google Patents
Ensemble moteur turbocompressé a deux conduits d'échappement et vanne de régulationInfo
- Publication number
- EP3303798A1 EP3303798A1 EP16733644.5A EP16733644A EP3303798A1 EP 3303798 A1 EP3303798 A1 EP 3303798A1 EP 16733644 A EP16733644 A EP 16733644A EP 3303798 A1 EP3303798 A1 EP 3303798A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- turbine
- exhaust
- engine
- main expansion
- expansion passage
- 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- Withdrawn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
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Classifications
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- 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
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
-
- 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
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
- F02B37/02—Gas passages between engine outlet and pump drive, e.g. reservoirs
-
- 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
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
- F02B37/02—Gas passages between engine outlet and pump drive, e.g. reservoirs
- F02B37/025—Multiple scrolls or multiple gas passages guiding the gas to the pump drive
-
- 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
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
- F02B37/12—Control of the pumps
-
- 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
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
- F02B37/12—Control of the pumps
- F02B37/18—Control of the pumps by bypassing exhaust from the inlet to the outlet of turbine or to the atmosphere
- F02B37/183—Arrangements of bypass valves or actuators therefor
-
- 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
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
- F02B37/12—Control of the pumps
- F02B37/20—Control of the pumps by increasing exhaust energy, e.g. using combustion chamber by after-burning
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0002—Controlling intake air
- F02D41/0007—Controlling intake air for control of turbo-charged or super-charged engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D41/0047—Controlling exhaust gas recirculation [EGR]
- F02D41/005—Controlling exhaust gas recirculation [EGR] according to engine operating conditions
- F02D41/0055—Special engine operating conditions, e.g. for regeneration of exhaust gas treatment apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/021—Introducing corrections for particular conditions exterior to the engine
- F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
- F02D41/024—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to increase temperature of the exhaust gas treating apparatus
- F02D41/0255—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to increase temperature of the exhaust gas treating apparatus to accelerate the warming-up of the exhaust gas treating apparatus at engine start
-
- 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
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
-
- 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
-
- 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
Definitions
- the present invention relates to an engine assembly for a motor vehicle comprising an internal combustion engine, a turbocharger and an exhaust system comprising two exhaust pipes whose two extensions inside the turbine meet in the turbine.
- An extension of one of the two exhaust ducts said exhaust duct through the turbine being in exchange for energy with a wheel of the turbine, a control valve being placed in this extension while an extension of the Another of the two ducts said discharge duct passes through the turbine but bypassing the wheel of the turbine.
- the exhaust system of such a motor assembly is connected to an output of the turbocharged engine, also called supercharged engine, for an exhaust gas exhaust from combustion in the engine, the engine being advantageously but not only a four-stroke gasoline engine.
- FIG. 1 shows a supercharged gasoline engine assembly according to the closest prior art described in particular in the document WO-A-2009/105463.
- Such an engine assembly is known under the name VEMB, abbreviation of the English name of "Valve Event Modulated Boost", translated into French by supercharging controlled by motor distribution.
- VEMB a supercharged gasoline engine assembly
- EGR line an exhaust gas recirculation line at the engine intake
- a thermal combustion engine comprises a cylinder block provided with at least one cylinder, preferably several cylinders and an air intake inlet or an air intake manifold for the gasoline air mixture in each cylinder and an exhaust gas outlet resulting from the combustion of the mixture in each cylinder.
- the output of the engine is connected to an exhaust manifold 5 supplying an exhaust duct 4, 9 exhausting the exhaust gases to the outside.
- the turbocharged engine comprises a turbine 2 and a compressor 3.
- the turbine 2 is disposed downstream of the exhaust manifold 5 in the exhaust pipe 4 while the compressor 3 is disposed upstream of the intake manifold. to the engine.
- the turbine 2 comprises a turbine wheel recovering at least partially a kinetic energy created in the exhaust gas passing therethrough, the rotary member or wheel of the turbine being rotated by the exhaust gases leaving the exhaust manifold .
- the turbine 2 drives the compressor 3 by being secured to it by an axis, the compressor 3 is traversed by fresh air for supplying air to the engine, air compressor 3 compresses.
- the air which is then called supercharging air is supplied by the air supply line to a charge air cooler 25 to cool the air leaving the compressor 3.
- a butterfly valve 26 regulating the flow of air into the air intake manifold of the motor forming the engine air inlet.
- exhaust gas exhausted from the engine enters the exhaust duct 9 of the motor vehicle after passing through the turbine 2 and Through exhaust gas removal means, for example one or more catalysts, in particular oxidation, reduction or three-way, associated or not with a particulate filter.
- exhaust gas removal means for example one or more catalysts, in particular oxidation, reduction or three-way, associated or not with a particulate filter.
- a selective catalytic reduction system or RCS system may also be provided in the exhaust duct 9.
- EGR line a recirculation line of the exhaust gas to the engine air intake
- EGR line a line being referenced 1 1 in Figure 1.
- spark ignition and compression ignition engines to recirculate the exhaust gases to the engine air intake to reduce nitrogen oxide emissions.
- Such a system is also known by the Anglo-Saxon acronym EGR for "Exhaust Gas Recirculation” which means Recirculation of Exhaust Gas.
- An EGR line 1 1 has a stitching on the exhaust duct to take a portion of the exhaust gas from the duct and a cooler 23 of the exhaust gas passing through this line 1 1, these gases then being very hot.
- Line RGE 1 1 opens on the intake of air upstream of the compressor 3 it feeds.
- a valve 24 called RGE valve equips the line RGE 1 1, advantageously downstream of the cooler 23 RGE, to open or close the flow of gas to the inlet.
- the thermal combustion engine forming part of the set 1 said supercharging controlled by engine distribution has at least one cylinder, in Figure 1 three cylinders.
- Each engine cylinder is equipped with an intake valve and two exhaust valves. These exhaust valves are selectively associated with a first or second exit passage in a cylinder and selectively open and close their associated passage.
- each cylinder It is the same for the intake valve associated with an inlet passage in each cylinder.
- the two outlet passages of each cylinder which are closed and opened sequentially by their associated exhaust valve open on a different exhaust manifold 5, 7 each supplying a dedicated exhaust duct 4, 6, the two ducts 4, 6 exhaust does not follow the same course as will be detailed below.
- the first exhaust passage of each cylinder is connected to the first manifold 5 and the second exhaust passage is connected to the second manifold 7.
- a motor assembly 1 said supercharging controlled by engine distribution therefore comprises a first duct 4 said exhaust turbine 2 leaving a first exhaust manifold 5 and a second duct 6 said discharge from a second exhaust manifold 7, the exhaust manifolds 5, 7 being each respectively connected to one of two sets of first or second exhaust passages provided with their exhaust valves provided for each cylinder.
- the first conduit 4 leads to an inlet face of the turbine 2 of the turbocharger being extended by a main expansion channel inside the turbine 2 housing a turbine wheel to recover the kinetic energy content. in the exhaust gas passing through it.
- the second duct 6 bypasses the turbine 2 without entering but joins further downstream of the turbine 2 a third duct 9 connected to an outlet face of the turbine 2 for exhaust gas evacuation of the main flash passage having been in exchange for energy with the turbine wheel, so that there is only one exhaust duct 9 passing through the pollution control elements 10 placed at the end of the exhaust system. It follows that, in such a motor-controlled supercharging engine assembly according to the state of the art, the second duct 6 has no penetrating extension in the turbine 2.
- the function of the first duct 4 said exhaust duct by turbine is to allow a first flow of exhaust gas to pass through the turbine 2 and its rotary energy recovery member in the form of a wheel to supply power to the compressor 3.
- the function of the second duct 6 said discharge duct and powered by a second exhaust manifold 7, different and independent of the first exhaust manifold 5 of the first duct 4, is to allow a second flow of exhaust independent and different from the first flow to bypass the turbine 2 and in particular its wheel and thus discharge the turbine 2 of the total flow of exhaust gas by decreasing the flow of exhaust gas therethrough by subtraction of the second ux to the total flow.
- a discharge valve which may be internal or external to the turbine serves to limit the pressure of the exhaust gas on the turbine wheel of the turbocharger by opening a bypass of the exhaust gas to that they no longer pass through the turbine and its wheel.
- a limitation of the speed of the wheel the turbine is thus obtained, which also limits the speed of rotation of the wheel provided in the compressor being integral with the impeller of the turbine, thereby also limiting the compression of the intake air.
- a relief valve associated with a turbine for regulating the flow of exhaust gas therethrough is no longer necessary with a motor-controlled supercharging engine assembly having two exhaust ducts each starting from a collector respective exhaust.
- Such an engine assembly improves the efficiency of the engine cycle by reducing the engine pumping during the exhaust phase of a four-stroke cycle, which has a favorable impact on the engine consumption. . Better control of the energy recovered by the turbine is therefore performed, which implies better management of the engine load.
- the problem underlying the invention is to improve a motor assembly said turbocharging engine controlled by two exhaust pipes allowing to have, as required under certain engine operating conditions. , the highest possible gas temperature in the exhaust system downstream of the turbine, by not increasing the size of the exhaust system and minimizing heat losses in the system.
- an engine assembly comprising an internal combustion engine with at least one cylinder, a turbocharger comprising a turbine and a compressor, and an exhaust system connected to an output of the engine for an exhaust gas exhaust from the combustion in the engine, the exhaust system comprising a first exhaust duct by the turbine leaving a first exhaust manifold and a second duct said discharge starting a second exhaust manifold, the turbine being provided with a casing having a main expansion passage in which is housed a turbine wheel and the first duct opening into the main relief passage through an inlet face of the casing , characterized in that the second conduit opens through the inlet face of the casing in at least one internal bypass portion to the casing bypassing the main passage the main relief passage and said at least one branch portion joining to an exit face of the housing, the main relief passage comprising inside the turbine, an exhaust gas flow control valve passing through it.
- the technical effect is to obtain a regulation of the gas temperature in the exhaust system downstream of the turbine by a simple and inexpensive means that is a control valve.
- a simple and inexpensive means that is a control valve.
- the exhaust gas flow control valve is controllable to regulate the entire gas flow in the entire range between 0% and 100%.
- 0% closed valve
- This valve can also be partially closed, by blocking x% of the flow, x can take any value above 0% and less than 100%. Its piloting controls the operation of the turbine.
- the exhaust system comprises a third duct outside the turbine and connected to the outlet face of the turbine casing for exhaust gas discharge out of the turbine.
- control valve is provided with an actuator moving it between at least a first closed position of the main expansion passage with a zero flow in the main relief passage and a second full opening position of the passage.
- main relaxation with maximum flow in the main relaxation passage.
- the actuator moves the regulating valve in intermediate opening positions corresponding to different flow rates in the main expansion passage according to the degree of opening corresponding to each respective intermediate position.
- control valve is in the form of a movable disc in translation or in rotation by the actuator.
- control valve is disposed on at least one outlet end of the main expansion passage at the outlet face of the turbine.
- the exhaust system comprises, downstream of the turbine, pollution control elements of the exhaust gas passing therethrough.
- the invention also relates to a heating up process of the pollution control elements in such a motor assembly, wherein, the pollution control elements requiring to be heated in order to acquire a predetermined minimum temperature to ensure the depollution treatment.
- the regulating valve of the main expansion passage maintains the flow of exhaust gas in the main expansion passage at a zero or reduced value until said minimum temperature is reached.
- a suspensive condition for maintaining the flow of exhaust gas passing through the first duct to a zero or reduced value is that the air intake pressure of the engine is greater than the atmospheric pressure.
- the invention also relates to a motor vehicle comprising the motor assembly described above.
- FIG. 1 is a diagrammatic representation of an engine-controlled supercharged turbocharged engine assembly comprising an exhaust system with two exhaust pipes according to the closest state of the art
- FIG. 2 is a schematic representation of an engine assembly comprising an exhaust system with two exhaust ducts according to the present invention, the turbine being traversed by the two ducts;
- FIG. 3 is a diagrammatic representation of a longitudinal section of a turbocharger, the compressor turbine forming part of the exhaust system of the engine unit according to the present invention and FIG. 3a showing an embodiment of the face. inlet of the turbine,
- FIG. 4 is a diagrammatic representation in perspective of another embodiment of a turbine equipped with a casing, this turbine forming part of the exhaust system of the motor assembly according to the present invention by integrating a valve of regulation,
- FIGS. 5 and 5a are diagrammatic representations of a view of the outlet face of a turbine provided with a control valve according to FIG. 4, the control valve being shown respectively in the closed position and in the open position; to these figures, this turbine forming part of the exhaust system of the motor assembly according to the present invention
- FIG. 6 is a diagrammatic representation in perspective of another embodiment of a turbine provided with a casing, this turbine forming part of the exhaust system of the motor assembly according to the present invention and incorporating a valve of regulation,
- FIGS. 7 and 7a are diagrammatic representations of a view of the exit face of a turbine provided with a control valve according to FIG. 6, the regulation valve being shown respectively in the closed position and in the open position; in these figures, this turbine forming part of the exhaust system according to the present invention.
- the figures are given by way of examples and are not limiting of the invention. They constitute schematic representations of principle intended to facilitate the understanding of the invention and are not necessarily at the scale of practical applications. In particular, the dimensions of the various elements illustrated are not representative of reality. Figure 1 has already been described in the introductory part of this patent application.
- downstream and upstream are to be taken in the direction of the flow of exhaust gas out of the engine or again to the engine inlet for the recirculation line, an element in the system. exhaust system downstream of the engine being further away from the engine than another element upstream of the element.
- the engine assembly includes the engine as well as its auxiliaries for the intake of air into the engine and for the exhaust of gases out of the engine, a turbocharger also forming part of the engine assembly, the turbine being included in the exhaust system of the engine assembly.
- the engine assembly 1 comprises an internal combustion engine with at least one cylinder and a turbocharger comprising a turbine 2 and a compressor 3.
- the turbine 2 comprises a wheel recovering at least partially the kinetic energy of the gases passing through it and transmits this energy to the compressor 3.
- the turbocharger is provided with an axis connecting the wheel of the turbine 2 to a wheel in the compressor 3, this member ensuring the compression of the air passing through the compressor 3.
- This axis can be lubricated , cooled by water and / or oil and installed on bearings with or without bearings.
- This axis may also be equipped with an electrical assistance, either directly on the axis, or with the help of gears, for example a transmission or a gearbox.
- the exhaust system is connected to an output of the engine for exhaust gas exhaust from combustion in the engine and comprises a first duct 4 said exhaust turbine 2 from a first collector 5 exhaust and a second duct 6 said discharge from a second exhaust manifold 7.
- the first and second manifolds 5, 7 are connected to the output of the internal combustion engine to ensure the channeling of the exhaust gases through the first and second conduits 4, 6.
- the engine cylinder or each cylinder of the engine can present at its output two exit passages closed by a respective exhaust valve but this is not mandatory.
- the two exhaust manifolds 5, 7 may be close to each other to be connected to the turbine 2, for example by the same exhaust manifold connection flange with a flange provided on a housing 2c of turbine 2, the housing 2c being particularly visible in Figures 3 and 6.
- the exhaust manifolds 5, 7 may be cooled by a cooling liquid, in particular water, the liquid flowing in a cooling circuit being common or not common to the two collectors 5, 7.
- the cooling circuit or circuits may also be used for cooling the inside of the turbine 2.
- the turbine 2 of the turbocharger is integrated in a casing 2c having at least one inlet face 2a for the exhaust gases of the first and second ducts 4, 6. penetrating the turbine 2 and an outlet face 2b for the exhaust gas leaving the turbine 2.
- the turbine 2 has a main relief passage 4 'in which is housed a turbine wheel and the first conduit 4 opens into the passage main relaxation 4 'by the inlet face 2a of the housing 2c.
- the main relaxation passage 4 ' is particularly visible in Figures 3, 4, 6.
- the second duct 6 opens through the inlet face 2a of the casing 2c in at least one branch portion 8 internal to the casing 2c bypassing the main relief passage 4 ', the main passage 4 'and said at least one branch portion 8 joining at an outlet face 2b of the casing 2c, the main relief passage 4' comprising, inside the turbine 2, a flow control valve 13 exhaust gas flowing through it.
- a branch portion 8 extending the second duct 6 is integrated in the turbine 2 but is not in exchange for kinetic energy with the wheel of the turbine 2, which provides a discharge effect of the turbine 2 even more effective than the discharge effect obtained with a relief valve.
- the control valve 13 advantageously allows to reduce and / or close the flow in the main relief passage 4 'extending the first duct 4 said exhaust in the turbine 2 and therefore to increase the temperature of the gases after joining the extensions in the turbine of the first and second ducts 4, 6 that are respectively the main relief passage 4 'and said at least one branch portion.
- Crossing the turbine 2 by the extension 4 ', 8 respectively of the two ducts 4, 6 exhaust also provides better thermal insulation of the second conduit 6 in the state of the art.
- the shortening of the second duct 6 obtained by the passage of the turbine 2 contributes to reducing the temperature loss of the gases passing through the second duct 6.
- a secondary advantage of the exhaust system of the engine assembly 1 according to the present invention since a bypass portion 8 extending the second duct 6 is integrated in the turbine 2, is to reduce the size of the exhaust system and reduce the expenditure material for the second conduit 6, the junction of the extension of the first and second conduits 4, 6 being in the turbine 2 and not after the turbine 2, resulting in a shortening of the length the second conduit 6 which does not have to have a length allowing it to bypass the turbine 2.
- the main passage of relaxation 4 'and said at least one branch portion 8 respectively extending the first and second conduits 4, 6 can lead to the same level of the turbine 2 to the outlet face 2b of the housing 2c.
- the exhaust system may comprise a third duct 9 outside the turbine 2 and connected to the outlet face 2b of the turbine casing 2c for exhaust gas discharge out of the turbine 2.
- the turbine 2 thus comprises an inlet face 2a for the exhaust gases of the first and second conduits 4, 6 entering through their extensions 4 ', 8 in the turbine 2 and an outlet face 2b externally connected to the third duct 9 external to the turbine 2.
- the main relief passage 4 'inside the turbine 2 is provided with a control valve 13.
- This control valve 13 can be advantageously close to the face outlet 2b of the turbine 2 by closing or selectively opening an outlet end 4b of the main expansion passage 4 ', thus being on the main expansion passage 4' after the wheel of the turbine 2.
- control valve 13 may be provided with an actuator 15 moving between at least a first closed position of the main passage of relaxation 4 'with a zero flow in the main relief passage 4' and a second full open position of the main relief passage 4 'with a maximum flow in the main relief passage 4'.
- the zero flow in the main expansion channel 4 ' may correspond to a heating demand of the pollution control elements 10 while the maximum flow rate in the main expansion passage 4' may correspond to a maximum power demand to the compressor 3 of the turbocharger.
- the actuator 15 can also move the control valve 13 in intermediate positions of opening corresponding to different flow rates in the main channel of relaxation 4 'according to the degree of opening corresponding to each respective intermediate position.
- control valve 13 may be in the form of a mobile disk in translation or in rotation by the actuator 15.
- a mobile disk rotating as a regulation valve 13 is shown in particular in FIGS. 5, 5a, 7 and 7a.
- the branch portion 8 extending the second conduit 6 may have an outlet end 8b and the main passage of relaxation 4 first lead 4 may have an output end 4b , the two output ends 4b, 8b opening near the outlet face 2b of the turbine 2, that is to say upstream of this outlet face 2b in the turbine 2.
- the third conduit 9 further comprises downstream of the outlet face 2b of the casing 2c of the turbine 2 elements depollution 10 of the exhaust gas therethrough, these depollution elements 10 having been mentioned previously.
- FIGS. 3, 3a, 4, 5 and 5a show a single outlet end 8b for a branch portion 8 while FIGS. 6, 7a and 7b show several outlet ends 8b for one or more branch portions 8.
- the main expansion channel 4 'extending the first duct 4 may also have an outlet end 4b at the place where the main relief passage 4' and the branch portion or portions 8 are joined.
- the outlet end 4b of the main expansion channel 4 ' may have a larger section than the section of the or an outlet end 8b of the at least one branch portion 8, but this is not mandatory.
- the outlet end 4b of the main relief passage 4 ' is advantageously of circular section, which is however not limiting.
- the at least one branch portion 8 may comprise at least two output ends 8b. This is illustrated in particular in Figures 6, 7 and 7a. Multiple outlet ends 8b for the bypass portion 8 extending the second discharge duct 6 may be in a plane parallel to or coincident with that of the outlet face 2b of the turbine 2.
- the two or more output ends 8b of a bypass portion 8 may be adjacent to each other in the turbine 2, which which is not shown in the figures.
- the two exit ends 8b of the at least one branch portion 8 may be uniformly distributed on an outlet disk disposed around the outlet end 4b of the main relaxation channel 4 'then being in the center of the disc, which is shown in Figures 6, 7a and 7b.
- the two or more output ends 8b of said at least one branch portion 8 may open radially or axially with respect to the outlet end 4b of the first duct 4.
- a radial outlet with a uniform distribution allows a optimization of the configuration of the casing 2c and associated turbine 2 as well as an optimization of the turbulence in the outlet face 2b of the casing 2c of the turbine 2.
- the two or more output ends 8b of the at least one branch portion 8 may be at least three in number, all opening radially or axially or a portion of the exit ends 8b opening radially with a complementary portion of the other output ends 8b opening axially. This is shown in Figures 6, 7 and 7a.
- an optimized form for the optimization of the turbine assembly 2 and its associated casing 2c and the turbulence optimization at the outlet face 2b of the turbine 2 for example a crescent shape, a half-moon shape, a shape oval, square, rectangular, triangular, etc.
- the output of the engine may comprise, by cylinder, at least one cylinder equipping the engine and advantageously three, first and second output passages closed by a respective exhaust valve, a series of first output passages of the cylinders supplying, via the first outlet manifold 5, the first exhaust duct 4 called turbine exhaust and a series of second outlet passages, via the second outlet manifold 7, supplying the second duct 6 says discharge.
- the exhaust system comprises, downstream of the turbine 2, elements 10 for removing pollution from the exhaust gas passing through it, this in the third duct 9.
- These depollution elements 10 need to be heated by being traversed by the hottest possible exhaust gas in order to acquire as quickly as possible a predetermined minimum temperature to ensure the depollution treatment. This is important especially during the period of time following the start of the motor vehicle. It is advantageous to close or reduce the flow of exhaust gas in the main channel of relaxation 4 'extending the first conduit 4, this stream losing a lot of heat in the wheel of the turbine 2 and then being less hot than the flow of the second duct 6 having bypassed the turbine 2.
- the invention therefore also relates to a heating up process of the pollution control elements 10 in the exhaust system of a motor assembly described above, wherein the control valve 13 maintains the flow of exhaust gas in the main expansion passage 4 'internal to the turbine 2 to a zero or reduced value until said minimum temperature is reached.
- the engine is greater than the atmospheric pressure. This corresponds to a power demand of the motor unit 1.
- an EGR line may be connected by a tap 12 to one of the two ducts 4, 6 or to one of their respective extensions in the turbine 2.
- a stitch 12 of a line RGE 1 1 through the turbine 2 either with the main expansion channel or with at least one branch portion 8 or with both.
- the turbine 2 may be equipped with a cooling circuit by a cooling liquid in its interior, including water.
- a cooling liquid in its interior, including water.
- the cooling circuit can extend inside the casing 2c at least around the entry face 2a and around the wheel of the turbine 2.
- the coolant flows advantageously over all the hot zones where a risk of melting the material of the casing 2c of the turbine 2 is identified.
- the flow of the coolant is generally in a single direction by realizing the entire tower of the casing 2c of the turbine 2, mainly in the area of an inlet flange of the turbine 2 and in the area around the wheel of the turbine 2.
- the cooling circuit can be connected to the cooling circuit of the turbine 2, with an inlet and an outlet of the cooling circuit of the turbine 2 may be on the input face 2a of the turbine 2.
- the cooling circuit of the turbine 2 is independent of that of each manifold 5, 7 exhaust and is clean. It is also possible for the turbine to be directly connected to the exhaust manifolds 5, 7, the first and second ducts 4, 6 then being integrated in their respective manifolds 5, 7.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Supercharger (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1554986A FR3037102B1 (fr) | 2015-06-02 | 2015-06-02 | Ensemble moteur turbocompresse a deux conduits d’echappement et vanne de regulation |
PCT/FR2016/051275 WO2016193598A1 (fr) | 2015-06-02 | 2016-05-27 | Ensemble moteur turbocompressé a deux conduits d'échappement et vanne de régulation |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3303798A1 true EP3303798A1 (fr) | 2018-04-11 |
Family
ID=53541842
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP16733644.5A Withdrawn EP3303798A1 (fr) | 2015-06-02 | 2016-05-27 | Ensemble moteur turbocompressé a deux conduits d'échappement et vanne de régulation |
Country Status (4)
Country | Link |
---|---|
US (1) | US20180171845A1 (fr) |
EP (1) | EP3303798A1 (fr) |
FR (1) | FR3037102B1 (fr) |
WO (1) | WO2016193598A1 (fr) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10787949B2 (en) | 2018-12-31 | 2020-09-29 | Ford Global Technologies, Llc | Systems and method for an exhaust port arrangement of a split exhaust system |
US10837395B2 (en) | 2019-03-05 | 2020-11-17 | Ford Global Technologies, Llc | Methods and systems to control fuel scavenging in a split exhaust engine |
US10954867B2 (en) | 2019-06-07 | 2021-03-23 | Ford Global Technologies, Llc | Methods and systems for estimating a composition of flow through a scavenge exhaust gas recirculation system of a split exhaust engine system |
US10900405B2 (en) | 2019-06-07 | 2021-01-26 | Ford Global Technologies, Llc | Methods and systems for estimating a flow of gases in a scavenge exhaust gas recirculation system of a split exhaust engine system |
US10947932B2 (en) | 2019-06-24 | 2021-03-16 | Ford Global Technologies, Llc | Methods and systems for adjusting a flow of gases in a scavenge exhaust gas recirculation system of a split exhaust engine system |
FR3128487B1 (fr) * | 2021-10-21 | 2023-09-08 | Psa Automobiles Sa | Dispositif d’injection d’air pour echappement |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999002830A1 (fr) * | 1997-07-07 | 1999-01-21 | Scania Cv Aktiebolag (Publ) | Turbocompresseur et procede d'installation d'un turbocompresseur |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56171630U (fr) * | 1980-05-22 | 1981-12-18 | ||
US4982567A (en) * | 1988-01-29 | 1991-01-08 | Mazda Motor Corporation | Air supply control systems for turbocharged internal combustion engines |
SE514806C2 (sv) | 1998-07-10 | 2001-04-30 | Saab Automobile | Turboladdad motor med delade avgasflöden och startkatalysator |
SE519321C2 (sv) * | 2001-06-29 | 2003-02-11 | Saab Automobile | Sätt att driva en förbränningsmotor samt förbränningsmotor |
US6941755B2 (en) * | 2003-10-28 | 2005-09-13 | Daimlerchrysler Corporation | Integrated bypass and variable geometry configuration for an exhaust gas turbocharger |
JP4395099B2 (ja) * | 2005-05-20 | 2010-01-06 | トヨタ自動車株式会社 | 過給機付き内燃機関の制御装置 |
JP2008095542A (ja) * | 2006-10-06 | 2008-04-24 | Toyota Motor Corp | 内燃機関の制御装置 |
DE102006060907A1 (de) * | 2006-12-20 | 2008-06-26 | Mp-Engineering Gmbh | Abgasturbolader |
US8495992B2 (en) | 2008-02-22 | 2013-07-30 | Borgwarner Inc. | Controlling exhaust gas flow divided between turbocharging and exhaust gas recirculating |
DE102009049993A1 (de) * | 2009-10-20 | 2011-04-21 | Continental Automotive Gmbh | Turbine für einen Abgasturbolader, Abgasturbolader, Kraftfahrzeug und Verfahren zum Betreiben eines Abgasturboladers |
DE102010029109A1 (de) * | 2010-05-19 | 2011-11-24 | Robert Bosch Gmbh | Vorrichtung und Verfahren zum Betreiben einer Antriebsvorrichtung |
JP5528528B2 (ja) * | 2012-11-22 | 2014-06-25 | 三菱電機株式会社 | 内燃機関の制御装置および制御方法 |
-
2015
- 2015-06-02 FR FR1554986A patent/FR3037102B1/fr active Active
-
2016
- 2016-05-27 WO PCT/FR2016/051275 patent/WO2016193598A1/fr active Application Filing
- 2016-05-27 EP EP16733644.5A patent/EP3303798A1/fr not_active Withdrawn
- 2016-05-27 US US15/575,296 patent/US20180171845A1/en not_active Abandoned
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999002830A1 (fr) * | 1997-07-07 | 1999-01-21 | Scania Cv Aktiebolag (Publ) | Turbocompresseur et procede d'installation d'un turbocompresseur |
Also Published As
Publication number | Publication date |
---|---|
FR3037102A1 (fr) | 2016-12-09 |
US20180171845A1 (en) | 2018-06-21 |
FR3037102B1 (fr) | 2019-11-22 |
WO2016193598A1 (fr) | 2016-12-08 |
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