EP1658419A1 - Dispositif de regulation thermique de gaz d'echappement - Google Patents
Dispositif de regulation thermique de gaz d'echappementInfo
- Publication number
- EP1658419A1 EP1658419A1 EP04786013A EP04786013A EP1658419A1 EP 1658419 A1 EP1658419 A1 EP 1658419A1 EP 04786013 A EP04786013 A EP 04786013A EP 04786013 A EP04786013 A EP 04786013A EP 1658419 A1 EP1658419 A1 EP 1658419A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bypass
- tube
- heat exchanger
- outlet
- inlet
- 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- Withdrawn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
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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
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/04—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust using liquids
- F01N3/043—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust using liquids without contact between liquid and exhaust gases
-
- 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
- F01N3/24—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 constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
- F01N3/2882—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices
- F01N3/2889—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices with heat exchangers in a single housing
-
- 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
- F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
- F01N2240/02—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a heat exchanger
-
- 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
- F01N2410/00—By-passing, at least partially, exhaust from inlet to outlet of apparatus, to atmosphere or to other device
-
- 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
- F01N2470/00—Structure or shape of gas passages, pipes or tubes
- F01N2470/24—Concentric tubes or tubes being concentric to housing, e.g. telescopically assembled
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/10—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
- F28D7/103—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically consisting of more than two coaxial conduits or modules of more than two coaxial conduits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
- F28D7/163—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation with conduit assemblies having a particular shape, e.g. square or annular; with assemblies of conduits having different geometrical features; with multiple groups of conduits connected in series or parallel and arranged inside common casing
- F28D7/1653—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation with conduit assemblies having a particular shape, e.g. square or annular; with assemblies of conduits having different geometrical features; with multiple groups of conduits connected in series or parallel and arranged inside common casing the conduit assemblies having a square or rectangular shape
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
- F28D9/0043—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
- F28D9/0043—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another
- F28D9/005—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another the plates having openings therein for both heat-exchange media
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2250/00—Arrangements for modifying the flow of the heat exchange media, e.g. flow guiding means; Particular flow patterns
- F28F2250/06—Derivation channels, e.g. bypass
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
-
- 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 invention relates to devices for thermal regulation of gases flowing along an exhaust line at the outlet of thermal engines of motor vehicles.
- devices for thermal regulation of the exhaust gases which exit a heat engine and go to a catalyst element of the type known under the designation "DENOX" and capable of reducing the nitrogen oxide content.
- These devices include a heat exchanger with an external bypass that allows the gases to reach the right temperature in the catalyst. The gases pass either through the exchanger to be cooled there, or in the bypass not to be cooled.
- the subject of the invention is a device for thermal regulation of exhaust gases from a vehicle engine which overcomes this drawback thanks to the presence of an internal bypass heat exchanger.
- the device for thermal regulation of gases flowing along an exhaust line of a heat engine comprises:
- said device comprising a housing accommodating at least said distribution means and said bypass, the inlet and / or outlet of said heat exchanger being located on the surface of said housing.
- the catalysis element can be used in a wide range of temperatures, or whatever the temperature of the exhaust gases, which makes it possible to operate the engine in lean mixture more often, or even whenever desirable to reduce fuel consumption.
- the heat exchanger and the bypass have at least one communication orifice allowing the introduction of the exhaust gases into said heat exchanger from said bypass.
- the bypass is produced in the form of a central bypass tube coupled by a first end to the inlet of the control device to be supplied by the exhaust gases of the heat engine , a transfer tube surrounding the central bypass tube over at least part of its length for transferring the exhaust gases circulating in the vicinity of a second end of the central tube in the heat exchanger disposed around the transfer tube.
- the heat exchanger makes it possible to cool the exhaust gases which pass through it, effectively, without lowering the temperature of the exhaust gases circulating inside the branch which is too much. separated from the cooling circuit of the exchanger. It should also be noted that such a device can, according to the invention, be applied to the thermal regulation of any type of gas, in particular exhaust gas recirculated at the intake of the engine.
- bypass means are then coupled between the second end of the central bypass tube and an exhaust gas outlet orifice of the regulating device for transmitting the gases leaving the second end of the central bypass tube, either directly to the exhaust gas outlet of the control device when the bypass means are in an open position, either indirectly to the exhaust gas outlet of the control device via the heat exchanger connected to the transfer tube, when the bypass means are in a closed position, or shared between these two directions when the bypass means are in an intermediate position between the open position and the closed position.
- the central bypass tube is crossed in the vicinity of its second end by openings which bring the interior of the central bypass tube into communication with the transfer tube.
- This arrangement prevents gases from entering the heat exchanger when the bypass means (generally a valve) are in a fully open position.
- the openings of the central tube are located very close to the second end of the central tube, which allows the pressure of the exhaust gases to drop before and after passing through the distribution means (generally a valve body). , and to make negligible gas leaks to the heat exchanger.
- the heat exchanger comprises a bundle formed of a multiplicity of parallel tubes arranged all around the transfer tube and assembled with the transfer tube, between a first and a second manifold with which they communicate, the assembly formed by the transfer tube, the ' bundle of tubes and the boxes manifolds being traversed by the exhaust gases passing through the openings of the central bypass tube located near its second end, while the bundle of tubes is cooled by a coolant circulating in the space left free between the tubes of the bundle .
- the exhaust gases pass through the openings at the second end of the central bypass tube and circulate between the walls of the central bypass tube and the transfer tube towards the first manifold of the heat exchanger where they penetrate to distribute through tubes of the tube bundle.
- the exhaust gases are cooled by the coolant which bathes the bundle of tubes before being directed towards the outlet of the regulating device.
- the first manifold consists of an annular flange on which a cylindrical wall depends, while the first manifold is closed by a cover into which open the ends of the bundle tubes and a first end of the transfer tube.
- the second manifold is projecting around a first end of a sleeve in which the second end of the central bypass tube is engaged and comprises a bottom delimited by a cylindrical wall of the sleeve in which the second end is engaged. of the central tube, and a second cylindrical wall surrounding the cylindrical wall of the sleeve, while the second manifold is closed by a cover in 1 P ⁇ U I rf p hnn ⁇ p.nt the ends of the bundle tubes.
- the bottom of the second manifold box advantageously has an annular opening centered on the longitudinal axis of the central bypass tube which places the interior of the second manifold in communication with a trunk-shaped exhaust gas outlet box. cone, connected by its largest base to the second manifold, the smallest base having an outlet orifice through which escape the exhaust gases leaving the regulating device.
- the distribution means comprise a valve body comprising an inlet orifice coupled to the sleeve and an outlet orifice, opposite the inlet orifice, opening into the gas outlet box. exhaust.
- the distribution means advantageously comprise a valve coupled between the heat exchanger and the bypass to transmit the exhaust gases, either directly from the inlet to the outlet when the valve is in the open position, or indirectly to the outlet by 1 'Intermediate heat exchanger when the valve is in the closed position, or shared between these two directions when the valve is in an intermediate position between the open position and the closed position.
- the heat exchanger is advantageously cooled by a mixture of water and glycol.
- the bypass is produced in the form of a straight tube extending between an inlet and an outlet of the regulation, while the gas circulation circuit in the heat exchanger has a U-shape and communicates with the bypass tube, respectively with an upstream intersection on the inlet side and a downstream intersection on the outlet side, the bypass means being coupled between the bypass tube and the heat exchange box.
- the bypass means advantageously comprise a butterfly type valve housed in the bypass tube between the upstream intersection and the downstream intersection.
- the bypass is made in the form of a straight tube extending between an inlet and an outlet of the device, while the heat exchanger is made in the form of plates or tubes parallel to the longitudinal direction of the tube forming the bypass and communicating with the tube forming the bypass respectively with an upstream intersection on the inlet side and a downstream intersection on the outlet side, the distribution means being coupled between the bypass tube and 1 ' heat exchanger .
- the heat exchanger In a fourth and fifth embodiment the heat exchanger, the bypass and the distribution means are enclosed in the same housing.
- the heat exchanger is formed by two half-bundles of parallel plates or tubes composed of two parallel blocks in the form of rectangular parallelipipeds arranged on either side of the same branch conduit extending between an inlet and a out of the housing.
- the valve is pivotally mounted in the bypass duct.
- each half-beam consists of plates traversed by a coolant, separated from each other by spaces or interstices which communicate directly with the bypass duct.
- each half-beam consists of tubes parallel to the longitudinal axis of the conduit which communicate by their respective ends with the bypass conduit via an inlet manifold and a outlet manifold fitted on the external faces of the housing around the ends of the bypass duct.
- the device comprises an internal bypass associated with a heat exchanger, the internal bypass and the heat exchanger being mounted between the inlet and the outlet of the device. .
- the invention in another aspect, relates to an installation for circulating exhaust gases for a heat engine, this installation comprising a device. thermal regulation of exhaust gases as defined above.
- the regulating device is advantageously interposed between a three-way catalyst and a catalysis element, in particular of the "Denox" type.
- FIG. 1 is a schematic sectional view of an exemplary embodiment of a device for thermal regulation of exhaust gases according to the invention
- FIG. 2 is an external front view of the thermal regulation device of FIG. 1;
- FIG. 3 is a diagram of an installation comprising a regulating device according to the invention interposed between a three-way catalyst and a catalysis element;
- Figure 4 is a sectional view of a thermal control device according to a second embodiment of one invention, interposed between a three-way catalyst and a catalyst element;
- FIGS. 5 and 6 are a sectional view and a perspective view of a thermal regulation device according to a third embodiment of the invention comprising a heat exchanger formed by a bundle of parallel plates;
- FIGS. 7 and 8 are sectional views of a thermal regulation device according to a fourth and a fifth embodiment of the invention respectively comprising a heat exchanger formed by a bundle of parallel plates and a bundle of parallel tubes ;
- FIG. 9 an exploded view of a thermal regulation device according to the fourth embodiment of
- FIGS. 10 and 11 are two perspective views of the thermal regulation device of Figure 9, in the assembled state, revealing the path of gas flow in the device when the valve of the distribution circuit is respectively in the open position and in the closed position;
- FIG. 12 is a perspective view of a thermal regulation device according to the fifth embodiment • showing the path of gas flow in the device when the distribution valve is in the open position;
- FIG. 13 a perspective view of a thermal control device according to the fifth embodiment showing the path of gas flow in the device when the valve is in the closed position;
- FIG. 14 a perspective view of a thermal regulation device according to the fifth embodiment showing the cooling circuit of the device.
- the thermal control device of the exhaust gas which is designated by 'reference numeral 1 in Figure 1 is more particularly intended to operate in conjunction with a thermal engine of a motor vehicle.
- the regulating device 1 comprises a central bypass tube 2 with a longitudinal axis XX ′, a first end of which is engaged in a gas inlet collar 3.
- the wall of the central bypass tube 2 is crossed in the vicinity of the second end of the tube by openings 4 which put
- the heat exchanger 5 is formed in a known manner by a bundle formed by a multiplicity of parallel tubes 7 arranged all around the transfer tube 6 in a direction parallel to the axis XX 'and assembled with the transfer tube 6, between a first manifold 8 and a second manifold 9 with which they communicate so that the assembly formed by the transfer tube 6, the bundle of tubes 7 and the manifolds 8 and 9 can be traversed by the exhaust gases.
- the first manifold 8 consists of an annular flange 10 on which a cylindrical wall 11 depends.
- the first manifold 8 is closed by a cover 12, forming a manifold, into which the ends of the tubes 7 of the bundle open and a first end of the transfer tube 6.
- the first manifold 8 is fixed by screws 13 against the gas inlet collar 3.
- the second manifold 9 is formed projecting around a first end of a sleeve 14 in which is engaged the second end of the central bypass tube 2. It consists of a bottom 15 delimited by a cylindrical wall 16 of the sleeve 14 in which is engaged the end of the central bypass tube 2, and a second cylindrical wall 17 surrounding the cylindrical wall 16 of the sleeve.
- the second manifold 9 is closed by a cover 18, forming a collector, into which the ends of the tubes 7 of the bundle open. The cover 18 thus forms the outlet of the heat exchanger.
- the bundle of parallel tubes 7 is disposed inside a cylindrical wall 19 concentric with the central bypass tube 2, closed at its ends by the covers 12 and 18 of the manifolds 8 and 9 and is cooled by a coolant such as as for example, a mixture of water and glycol, coming from the engine cooling circuit, not shown.
- the coolant enters the space left free between the tubes 7 of the bundle and the space delimited by the cylindrical wall 19 and the covers 12 and 18 of the manifolds 8 and 9, by an intake manifold 20 and an exhaust pipe 21 (FIG. 2) connected to the engine cooling circuit.
- the cover 18 thus constitutes the outlet of the heat exchanger 5.
- the bottom 15 of the second manifold 9 has an annular opening 22 delimited by two circular edges centered on the longitudinal axis XX 'of the central bypass tube 2.
- the annular opening 22 connects the interior of the second manifold 9 with an exhaust gas outlet box 24, which has a flange 23 for fixing it to the manifold 9.
- the outlet box 24 has the shape of a truncated cone and is connected by its largest base to the manifold 9, the smallest base comprising an outlet orifice 25 through which escape the exhaust gases leaving the regulating device 1.
- the sleeve 14 also puts the central bypass tube 2 into communication with the outlet box 24 for the exhaust gases by means of a valve 26 provided with a valve 27 and the body of which comprises an inlet port 28 coupled to the sleeve 14 and an outlet orifice 29, opposite the inlet orifice 28, opening opposite the outlet orifice 25.
- the valve body has the shape of a cylinder centered on the axis XX 'and it is connected to the outlet box 24 by a diametrical spacer 30.
- the valve 27 is controlled in rotation by an actuator 31, for example a pneumatic valve, shown in FIG. 2, and makes it possible to control the temperature of the exhaust gases exiting through the orifice 25 of the outlet box 24.
- an actuator 31 for example a pneumatic valve, shown in FIG. 2, and makes it possible to control the temperature of the exhaust gases exiting through the orifice 25 of the outlet box 24.
- the regulating device comprises a box, formed here by the gas inlet collar 3, the cylindrical wall 19 and the outlet box 24.
- This box accommodates at least the distribution means, that is to say here the valve 26 , and the branch 2.
- the inlet 4 and / or the outlet 18 de.1 'heat exchanger are located on the surface of said housing. Optimal operation of the device which has just been described can be obtained by taking particular care that the cross-sections of the exhaust gas flows in the central tube 2 and in the circuit formed by the transfer tube 6 and the heat exchanger. heat 5 are more or less constant, this in order to minimize the pressure drops in the circuits and the thermal losses in the central tube 2.
- the openings 4 of the central tube 2 are placed very close to the second end of the central tube, which allows the pressure of the gases exhaust fall before and after crossing the valve body, and greatly limit gas leakage to the heat exchanger 5.
- the exhaust gas arriving by the inlet flange 3 are directed through the central bypass duct 2 and the valve body 26 directly to the outlet manifold 24.
- the exhaust gases pass through the openings 4 located at the second end of the central bypass tube 2 and circulate between the wall of the central bypass tube 2 and that of the transfer tube 6 towards the first manifold 8 of the heat exchanger 5 where they penetrate to be distributed through the tubes 7 of the tube bundle.
- the exhaust gases are cooled by the coolant which bathes the bundle of tubes 7, then they are directed towards the outlet box 2.
- valve 27 When the valve 27 is in an intermediate open position, it can be controlled so as to control the flow of exhaust gases leaving the valve body 26 and the flow of gas flowing in the heat exchanger 5 to obtain a precise temperature value determined at the outlet in the outlet orifice 25 of the outlet box 24.
- FIG. 3 schematically illustrates the integration of a regulation device 1 according to the invention between a catalyst 32 of the three-way type and a catalyst element 33 of the "Denox" type.
- the catalyst 32 is connected to the manifold 34 of a heat engine 35 and is thus supplied by the latter's exhaust gases.
- the exhaust gases are cooled to the right temperature thanks to the regulating device of the invention, then being sent to the catalysis element 33 which decreases the content of nitrogen oxides in the gases d 'exhaust. These are then evacuated to the outside via a conduit 36.
- the regulating device 1 can be constituted by a regulating device as shown in FIGS. 1 and 2, or also by another regulating device with internal bypass meeting the characteristics of the invention.
- FIG. 4 schematically illustrates another thermal regulation device 1 according to the invention.
- This device 1 comprises an inlet 37 and an inlet 38 connected respectively to the outlet of a catalyst 32 similar to that of FIG. 3, and to the inlet of a catalyst element 33 similar to that of FIG. 3. also shown in Figure 4 the manifold 34 of the exhaust gas and the pipe 36 which discharges the exhaust gas to the outside.
- the bypass is produced here in the form of a straight tube 39 extending between the inlet 37 and the outlet 38 of the thermal regulation device.
- the device further comprises a heat exchanger 40 provided with a TJ-shaped gas circulation circuit communicating with the bypass tube 39, respectively with an upstream intersection 41 on the side of the inlet 37 and with a downstream intersection 42 on the side of the outlet 38.
- the heat exchanger 40 defines two circulation branches 43 and 44 connected by a U-shaped bend 45.
- An intermediate partition 46 defines the inlet and the outlet of the branches 43 and 44.
- the device 1 of FIG. 4 further comprises a butterfly type valve 47 housed in the bypass tube 39 between the upstream intersection and the downstream intersection so as to be coupled between the bypass tube and the heat exchange tube. heat.
- This bypass valve is pivotally mounted about an axis 48.
- the regulating device comprises a housing 39 'which, as in the previous embodiment, receives at. minus the distribution means, ie the valve 47 and the bypass 39.
- the inlet (upstream intersection 41) and / or the outlet (downstream intersection 42) of the heat exchanger are located on the surface of said housing .
- the coolant circulates in a space 45 'left free between the gas circulation branches 43, 44 and the internal wall of the tube 40.
- FIGS. 5 and 6 illustrate an alternative embodiment of the thermal regulation device of FIG. 4.
- This device comprises, like the device of FIG. 4 where the homologous elements bear the same references, a bypass conduit in the form of a tube 39 accommodating distribution means in the form of a valve valve 47 of the butterfly type controlled similarly to the valve 27 of FIG. 1 by an actuator 31.
- the bypass tube 39 plays the role of the housing 39 ′ and extends between an inlet 37 and an outlet 38 connected respectively, as shown in FIG. 3, to the outlet of a catalyst 32 similar to that of FIG. 3, and to the inlet of a catalysis element 33 similar to that of FIG. 3.
- the device further comprises a heat exchanger 40 communicating with the bypass tube 39 respectively with an upstream intersection branch 41 on the side of the inlet 37 and a downstream intersection branch 42 on the side of the outlet 38.
- a heat exchanger 40 communicating with the bypass tube 39 respectively with an upstream intersection branch 41 on the side of the inlet 37 and a downstream intersection branch 42 on the side of the outlet 38.
- the heat exchanger 40 is formed, as shown in FIG. 6, of a bundle of plates or tubes 49 parallel to the longitudinal direction of the tube 39 and traversed by a coolant circulating between an inlet orifice 51 and a outlet orifice 52.
- all or part of the plates 49 can be formed in known manner by turbulence-generating plates.
- valve flap 47 is pivotally mounted in the bypass tube 39 between the upstream intersection branch 41 and the downstream intersection branch 42.
- the gas enters the device through the inlet orifice 37 of the tube 39.
- the regulation of its temperature is controlled by the valve 47 of the valve.
- the valve 47 When the valve 47 is in the open position, the exhaust gases are transmitted directly from the inlet 37 to the outlet 38.
- the valve 47 is in the closed position, the exhaust gases follow a "C" shaped circuit. . They are transmitted in the heat exchanger 40 by the branch of intersection 41 and exit from the heat exchanger 40 by the branch of intersection 42 in the direction of the outlet 38 for entering the catalysis element 38. Finally, when the valve is in an intermediate position, the exhaust gases are shared between the tube 39 and the heat exchanger 40.
- FIG. 7 to 13 illustrate two other embodiments of a regulation device according to the invention.
- the heat exchanger is constituted by two half-bundles of parallel plates or tubes forming two parallel blocks 40a and 40b in the form of parallelipiped rectangles arranged on either side of the same branch conduit 39 extending partially between the inlet 37 and an outlet 38 of the bypass duct 39, the inlet 37 and the outlet 38 being respectively connected to the outlet of a catalyst 32 similar to that of FIG. 3, and to the inlet of an element of catalysis 33 similar to that of FIG. 3.
- the blocks 40a, 40b are kept separate inside the housing 39 'between two parallel rectangular plates 53 and 54 respectively forming a bottom wall 53 and a closing wall 54 of the housing 39'.
- the bypass duct 39 is delimited by the space between the two plates 53 and 54 and by the lateral faces 55 and 56 of the two blocks 40a, 40b facing each other and it is extended outside this space by two portions of tubes 57, 58 allowing the connection of the bypass duct 39 between the outlet of the catalyst 32 and the inlet of the catalyst element 33.
- the valve 47 of the valve is introduced into the bypass tube 39 through an orifice 47a passing through the closure plate 54 of the housing 39 'and is kept suspended in the bypass tube by a support plate 47b screwed onto the closure plate 54 .
- the side walls 59 to 62 of the housing 39 ' are produced by folding at right angles to two opposite ends of the plates 53 and 54 and by fitting the folded ends of each plate into the U formed by the folded parts of the other plate.
- the side walls 59, 60 of the housing 39 ' which are parallel to the bypass duct 39, respectively cover the faces of the blocks 40a, 40b, opposite the side faces 55, 56 of the two blocks 40a, 40b facing each other.
- the blocks 40a, 40b can thus be fixed to the housing 39 'on the walls of the corresponding dihedron formed by the bottom plate 53 and the side walls 59, 60 parallel to the bypass pipe 39.
- Each half-beam is constituted by parallel plates 61 stacked above the bottom plate 53 and traversed by a cooling liquid circulating between an inlet pipe 63a and an outlet pipe 63b.
- the half-beams making up the blocks 40a and 40b are interconnected by a coolant circulation duct 64.
- the plates are separated from each other by spaces or interstices 65 which communicate directly with the bypass duct 39.
- the housing 39 ′ comprises a bottom plate 53, a plate of closure 54 and two side walls 59, 60 parallel to the longitudinal axis of the bypass duct 39.
- the side walls 59, 60 of the housing 39 ', parallel to the bypass duct 39 respectively cover the faces of the blocks 40a, 40b opposite the lateral faces 55, 56 facing the two blocks 40a, 40b.
- the lateral faces 55, 56 facing the blocks 40a, 40b no longer communicate with the bypass duct 39, but they are isolated from it either by a single plate respectively 66, 67 or by two plates separated by an air knife or by a thermally insulating material arranged in a spacer between the bottom wall 53 and the closure wall of the housing 54.
- the blocks 40a, 40b are fixed to the housing 39 'against the walls of the corresponding dihedron formed by the bottom plate 53 and the side walls 59, 60 parallel to the bypass pipe 39.
- the ends of the housing 39 ′ which were covered in FIGS. 9, 10, 11 by the side plates 61, 62 perpendicular to the longitudinal axis of the bypass duct 39 are open and communicate respectively with the inlet and the outlet of the device at through a manifold respectively 68, 69.
- the heat exchanger consists of two half-bundles of tubes 70 parallel to the longitudinal axis of the bypass duct 39.
- the two half-bundles communicate by the respective ends of their tubes 70 with the bypass duct 39 by the intermediate an inlet manifold 68 in the shape of a truncated pyramid at its top and an outlet manifold 69 also in the shape of a truncated pyramid at its top.
- the two manifolds 68 and 69 have their large bases fitted onto the external faces of the housing 39 'around the ends of the bypass duct 39. They communicate respectively with the inlet 37 and the outlet 38 of the device regulating by conduits 57, 58 engaged in orifices made on the smallest bases of the manifolds 68 and 69.
- valve 47 of the valve When the valve 47 of the valve is in the open position, the exhaust gases are transmitted directly from the inlet 37 to the outlet 38 through the bypass duct 39.
- the valve 47 of the valve When the valve 47 of the valve is in the closed position as shown in FIG. 9, the exhaust gases are transmitted into the heat exchanger 40 by the inlet manifold 68 and exit through the outlet manifold 69 after having followed a path in the form of , ⁇ 0 ". Finally when the valve 47 of the valve is in an intermediate position, the exhaust gases are shared between the duct 39 and the heat exchanger 40.
- thermal regulation device 1 As indicated above, the thermal regulation device 1 according to the invention can be used in other applications.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Exhaust Silencers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0310314A FR2859238B1 (fr) | 2003-08-29 | 2003-08-29 | Dispositif de regulation thermique de gaz d'echappement |
FR0315378A FR2859239B1 (fr) | 2003-08-29 | 2003-12-24 | Dispositif de regulation thermique de gaz d'echappement |
PCT/FR2004/002051 WO2005024193A1 (fr) | 2003-08-29 | 2004-07-30 | Dispositif de regulation thermique de gaz d’echappement |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1658419A1 true EP1658419A1 (fr) | 2006-05-24 |
Family
ID=34137709
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04786013A Withdrawn EP1658419A1 (fr) | 2003-08-29 | 2004-07-30 | Dispositif de regulation thermique de gaz d'echappement |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1658419A1 (fr) |
FR (1) | FR2859239B1 (fr) |
WO (1) | WO2005024193A1 (fr) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007105815A1 (fr) * | 2006-03-16 | 2007-09-20 | Toyota Jidosha Kabushiki Kaisha | Dispositif de recuperation de chaleur des gaz d'echappement |
US7610949B2 (en) | 2006-11-13 | 2009-11-03 | Dana Canada Corporation | Heat exchanger with bypass |
US8443593B2 (en) | 2008-12-12 | 2013-05-21 | Westcast Industries, Inc. | Liquid-cooled exhaust valve assembly |
EP2381083A1 (fr) | 2010-04-22 | 2011-10-26 | C.R.F. Società Consortile per Azioni | Unité pour la récuperation et la conversion d'énergie thermique des gaz d'échappement |
US8424296B2 (en) | 2010-06-11 | 2013-04-23 | Dana Canada Corporation | Annular heat exchanger |
US9664087B2 (en) | 2010-07-22 | 2017-05-30 | Wescast Industries, Inc. | Exhaust heat recovery system with bypass |
ITBO20100474A1 (it) | 2010-07-27 | 2012-01-28 | Magneti Marelli Spa | Silenziatore con scambiatore di calore integrato |
FR2978491B1 (fr) * | 2011-07-26 | 2013-08-09 | Peugeot Citroen Automobiles Sa | Ensemble de traitement des gaz d'echappement d'un moteur a combustion comportant une boite d'introduction et de premelange d'un fluide |
KR20140075710A (ko) | 2011-09-09 | 2014-06-19 | 다나 캐나다 코포레이션 | 적층된 플레이트 배기 가스 회수 장치 |
WO2013059941A1 (fr) | 2011-10-28 | 2013-05-02 | Dana Canada Corporation | Refroidisseur d'air de suralimentation à écoulement divisé et à rebords surbaissés, doté d'un collecteur de sortie d'écoulement uniforme |
CN103089372B (zh) * | 2011-10-29 | 2015-05-13 | 刘莞欣 | 换热*** |
ITBO20120626A1 (it) | 2012-11-15 | 2014-05-16 | Magneti Marelli Spa | Scambiatore di calore con recupero di energia termica per un sistema di scarico di un motore a combustione interna |
US9989322B2 (en) | 2013-03-01 | 2018-06-05 | Dana Canada Corporation | Heat recovery device with improved lightweight flow coupling chamber and insertable valve |
EP3591199A1 (fr) * | 2016-11-08 | 2020-01-08 | C.R.F. Società Consortile per Azioni | Unité de conversion d'énergie thermique |
FR3062416A1 (fr) * | 2017-01-27 | 2018-08-03 | Faurecia Systemes D'echappement | Dispositif de traitement des gaz d'echappement, ligne d'echappement et procede de fabrication correspondant |
CN110332829B (zh) * | 2019-04-03 | 2020-07-31 | 新乡北新建材有限公司 | 一种石膏板新型换热器结构 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3050935A (en) * | 1961-01-05 | 1962-08-28 | Socony Mobil Oil Co Inc | Apparatus for catalytically treating internal combustion engine exhaust gases |
US5033264A (en) * | 1989-06-16 | 1991-07-23 | Tecogen Inc. | Compact cogeneration system |
DE4212251C1 (fr) * | 1992-04-11 | 1993-03-18 | Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De | |
FR2755727B1 (fr) * | 1996-11-08 | 1999-01-15 | Valeo Thermique Moteur Sa | Pot catalytique avec protection du catalyseur contre les hautes temperatures |
DE19817341A1 (de) * | 1997-05-02 | 1998-11-05 | Volkswagen Ag | Abgaswärmetauscher |
DE19817340A1 (de) * | 1997-05-02 | 1998-11-05 | Volkswagen Ag | Verfahren zur Erwärmung der Kühlflüssigkeit bei einem Kraftfahrzeug und Abgasanlage |
DE19817342A1 (de) * | 1997-05-02 | 1998-11-05 | Volkswagen Ag | Abgasanlage mit einem Katalysator und einem Wärmetauscher für ein Kraftfahrzeug |
FR2776015B1 (fr) * | 1998-03-11 | 2000-08-11 | Ecia Equip Composants Ind Auto | Organe d'echappement a echangeur de chaleur |
DE10035760A1 (de) * | 2000-07-22 | 2002-01-31 | Daimler Chrysler Ag | Wärmetauscher für Abgas einer Brennkraftmaschine |
US6702190B1 (en) * | 2001-07-02 | 2004-03-09 | Arvin Technologies, Inc. | Heat transfer system for a vehicle |
DE10139424B4 (de) * | 2001-08-17 | 2004-08-05 | Benteler Automobiltechnik Gmbh | Abgasanlage eines Kraftfahrzeugs |
-
2003
- 2003-12-24 FR FR0315378A patent/FR2859239B1/fr not_active Expired - Fee Related
-
2004
- 2004-07-30 WO PCT/FR2004/002051 patent/WO2005024193A1/fr active Application Filing
- 2004-07-30 EP EP04786013A patent/EP1658419A1/fr not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
See references of WO2005024193A1 * |
Also Published As
Publication number | Publication date |
---|---|
FR2859239A1 (fr) | 2005-03-04 |
WO2005024193A1 (fr) | 2005-03-17 |
FR2859239B1 (fr) | 2006-01-20 |
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