EP1934458A1 - Refroidisseur de gaz recircules - Google Patents
Refroidisseur de gaz recirculesInfo
- Publication number
- EP1934458A1 EP1934458A1 EP06831259A EP06831259A EP1934458A1 EP 1934458 A1 EP1934458 A1 EP 1934458A1 EP 06831259 A EP06831259 A EP 06831259A EP 06831259 A EP06831259 A EP 06831259A EP 1934458 A1 EP1934458 A1 EP 1934458A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cooler
- ducts
- exchanger
- outlet
- duct
- 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.)
- Granted
Links
Classifications
-
- 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
- F28D7/06—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 having a single U-bend
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
- F02M26/29—Constructional details of the coolers, e.g. pipes, plates, ribs, insulation or materials
- F02M26/30—Connections of coolers to other devices, e.g. to valves, heaters, compressors or filters; Coolers characterised by their location on the engine
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/65—Constructional details of EGR valves
- F02M26/71—Multi-way valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
- F28F27/02—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus for controlling the distribution of heat-exchange media between different channels
-
- 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
- F02M26/50—Arrangements or methods for preventing or reducing deposits, corrosion or wear caused by impurities
-
- 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
Definitions
- the present invention relates to recirculated gas coolers, called EGR gas, or EGR gas (exhaust gas recirculation).
- EGR gas exhaust gas recirculation
- EGR circuit exhaust gas recirculation of exhaust gas in the intake
- specific coolers for these gases makes it possible to further increase this depollution.
- a major problem is that the recirculation of the exhaust gas leads to a significant fouling of the components that are in this EGR circuit. This is why we can proceed to cleaning / cleaning sessions by fully opening the EGR valve (the EGR valve regulates the flow of EGR gas that starts at the intake) when the engine is on a specific operating zone.
- This method described in patent application FR2833653, makes it possible to thermally eliminate the deposits accumulating in the EGR circuit.
- Document J P20043400099 relates to an EGR system of an internal combustion engine comprising two groups of separate cylinders.
- This EGR system has the particularity of being able to reverse the flow of exhaust gas flowing in the duct, and consequently in the coolers, by modifying the pressures of the exhaust gases between the first and the second group of cylinders.
- a major disadvantage is that it is necessary to have two groups of separate cylinders in which the exhaust gas pressures can be modified.
- the invention aims to solve the problem of fouling EGR coolers.
- the invention proposes for this purpose a recirculated gas cooler defining an inlet duct and a recirculated gas outlet duct and having a heat exchanger configured in U with an inlet duct and an outlet duct.
- the cooler comprises a pair of crossed ducts for bypassing the recirculated gases and a mobile distributor between a first position allowing the recirculated gas flow to pass through the exchanger in one direction, and a second position allowing the flow of gas recirculated to cross the exchanger in the opposite direction.
- FIGS. 1, 2, 3, 4 , 5, 6 and 7 show a first embodiment.
- - Figures 8, 9, 10 and 1 1 show a second embodiment.
- the cooler 1 of recirculated gas comprises a heat exchanger 2 configured in a U, that is to say it comprises inlet ducts e2 and outlet s2 which open substantially on the same side.
- the cooler 1 defines an inlet duct e1 and an outlet duct if recirculated gas.
- the cooler 1 comprises an additional pair of crossed conduits for bypassing the recirculated gases and a distributor.
- the distributor is in communication with the inlet ducts E1 output e2 of the cooler, the crossed bypass ducts, and the inlet ducts e2 and outlet s2 of the exchanger 2.
- the distributor is movable between two positions: the first position allows the flow of recirculated gas through the exchanger 2 in one direction (said normal direction), and the second position allows the flow of recirculated gas through the exchanger 2 in the opposite direction. According to a first embodiment shown in FIGS.
- the distributor is a slidable distributor 5 between a first position allowing the recirculated gas flow to pass through the exchanger 2 in one direction (in the normal sense), and a second position allowing the flow of recirculated gas to pass through the exchanger 2 in the opposite direction.
- the drawer 5 can be moved by any actuator known to those skilled in the art.
- the slide 5 slides in an enclosure 4. It has two pairs of communication ports (5a, 5d, 5b, 5c) (FIG.
- the orifices (5a, 5d, 5b, 5c) of each pair are each capable of being in communication with one of the two ducts (e2, s2) of the heat exchanger (2).
- the orifices (e2, s2) of the heat exchanger 2 may be elongated to allow this communication.
- the orifices 5a and 5d which are offset in height can communicate according to the position of the drawer 5 with the outlet duct s2 of the exchanger 2, and the orifices 5b and 5c which are also offset in height can communicate according to the position of the drawer 5 with the inlet duct e2 of the exchanger 2.
- the inlet ducts e1 and outlet si of the cooler and the two crossed bypass ducts (de1, ds1) are arranged so as to be able to communicate with an orifice (5a, 5d, 5b, 5c) of the drawer 5.
- the crossed ducts of branches (de1, ds1) are upstream of the drawer 5.
- these crossed ducts downstream of the drawer on the input ducts e2 and outlet s2 of the exchanger 2, and adapt the inlet ducts e1 and outlet if cooler 1 to give them an elongated shape of the type of the ducts of the exchanger 2.
- the crossed bypass ducts serve to guide the flow of EGR gas in the opposite direction, they are connected to the inlet ducts e1 and outlet if cooler 1; the bypass duct de1 is connected to the inlet duct e1 and returns the EGR gas side of the outlet duct if; the ds1 bypass duct is connected to the outlet duct if and sends the gases EG R on the side of the inlet duct e1.
- the crossed ducts (de1, ds1) of branches are deactivated. Only the ducts e1 and si are activated: the inlet duct e1 of the cooler 1 communicates with the orifice 5b of the spool 5 and the flow of gas goes into the inlet duct e2 of the exchanger 2. The duct if the cooler 1 communicates with the orifice 5d of the spool 5, and the EGR gas flow arrives from the outlet pipe s2 of the exchanger 2 and goes to the outlet duct if cooler r 1.
- the inlet bypass duct de1 of the cooler 1 communicates with the orifice 5a of the drawer 5.
- the duct output bypass ds1 of the cooler 1 communicates with the orifice 5c of the spool 5.
- the flow of EGR gas arrives via the inlet duct e1 of the cooler 1, passes through the inlet bypass duct de1, passes through the orifice 5a, passes through the inlet duct e2 of the exchanger 2 and then through the outlet duct s2, then passes through the orifice 5c of the spool 5, passes through the outlet bypass duct ds1 and leaves the cooler 1 by the outlet duct if.
- the cooler 1 according to the invention may also comprise a bypass 6 of the exchanger 2.
- This bypass 6 is arranged, in this first embodiment, upstream of the spool valve 5.
- I l allows to connect the inlet ducts e1 and outlet if cooler 1.
- the bypass 6 defines for this purpose a connecting pipe which comprises a valve or a shutter.
- the distributor is a rotary ball valve 7 between a first position allowing the stream of recirculated gases to pass through the exchanger (2) in one direction, and a second position allowing the flow of recirculated gas to cross the exchanger (2) in the opposite direction.
- the cooler 1 comprises an inlet duct e1 and an outlet duct 11 if which open on the rotary plug 7.
- An additional duct e '1 connected to the conduit e1 opens on the 7.
- another additional duct is connected to the duct if open on the plug 7.
- the exchanger 2 comprises an inlet duct e2 and an outlet duct s2.
- the exchanger 2 also comprises two crossed bypass conduits de2 and ds2.
- the crossed bypass ducts serve to guide the flow of EGR gas in the opposite direction;
- the inlet bypass duct de2 is connected to the inlet duct e2 and returns the EGR gas side of the outlet duct s2;
- the outlet bypass duct ds2 is connected to the outlet duct s2 and returns the EGR gas from the side of the inlet duct e2.
- the plug 7 has the shape of a cylindrical piece which defines two parallel transverse bores 8 and 9.
- the axes of the bores 8 and 9 are arranged on the same longitudinal plane of the plug 7.
- the transverse bores (8, 9) are capable of communicating on the one hand the input ducts (e1, e2) between them and the output ducts (s1, s2) between them, and on the other hand the additional ducts (é1, s'1) with the crossed bypass ducts (d ⁇ 2, ds2)
- the axes of the inlet ducts e1, é1 opening on the plug 7, the axes of the inlet ducts e2, ds2 opening on the plug 7, and the axis of the bore 8 are located substantially in the same radial plane to the plug 7.
- the ends of the ducts e1, e'1, e2, ds2 are distributed so that the bore 8 connects on the one hand the duct e1 and the duct e2, and on the other hand the duct e1 and the duct ds2.
- the dispenser may comprise a third position making it possible to pass the exchanger (2).
- the plug 7 defines for this purpose a longitudinal groove 10 of a length for connecting the ducts e1 and si. When the plug 7 is in this position, the holes 8 and 9 do not communicate with any of the conduits.
- An advantage of the present invention is that it is possible, during a chilling phase of the cooler, to reverse the flow of EGR gas in order to completely clean the exchanger. Another advantage is that one can standardize the natural fouling of the exchanger, alternating the flow of EGR gas in the exchanger. Another advantage is that controlled cooling of the EGR gases can be done by controlling the position of the plug 7 in the vicinity of the first and second positions. To achieve this, the groove 10 made in the plug 7 is disposed near the bores 8 and 9. Part of the flow can then pass through the exchanger 2 in the normal or inverted direction, and the other passes directly through the groove 10 to stand out, the sum of the two parts guaranteeing a flow of gas independent of the position of the plug 7.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Exhaust-Gas Circulating Devices (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0552968A FR2891589A1 (fr) | 2005-09-30 | 2005-09-30 | Refroidisseur de gaz recircules |
PCT/FR2006/050973 WO2007039700A1 (fr) | 2005-09-30 | 2006-10-02 | Refroidisseur de gaz recircules |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1934458A1 true EP1934458A1 (fr) | 2008-06-25 |
EP1934458B1 EP1934458B1 (fr) | 2011-11-30 |
Family
ID=36636992
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06831259A Not-in-force EP1934458B1 (fr) | 2005-09-30 | 2006-10-02 | Refroidisseur de gaz recircules |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1934458B1 (fr) |
AT (1) | ATE535701T1 (fr) |
FR (1) | FR2891589A1 (fr) |
WO (1) | WO2007039700A1 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007038882A1 (de) | 2007-08-17 | 2009-02-19 | Pierburg Gmbh | Abgaskühlvorrichtung für eine Verbrennungskraftmaschine |
DE102014106386B4 (de) * | 2014-05-07 | 2016-08-11 | Benteler Automobiltechnik Gmbh | Abgaswärmetauscher mit Bypassrohr |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1138888B1 (fr) * | 2000-03-27 | 2005-05-18 | Toyota Jidosha Kabushiki Kaisha | Dispositif de purification des gaz d'échappement d'un moteur à combustion interne |
LU90761B1 (en) * | 2001-04-20 | 2002-10-21 | Delphi Tech Inc | Device for exhaust gas recirculation |
US7011080B2 (en) * | 2002-06-21 | 2006-03-14 | Detroit Diesel Corporation | Working fluid circuit for a turbocharged engine having exhaust gas recirculation |
JP4299054B2 (ja) * | 2003-05-19 | 2009-07-22 | トヨタ自動車株式会社 | 内燃機関のegr装置 |
-
2005
- 2005-09-30 FR FR0552968A patent/FR2891589A1/fr active Pending
-
2006
- 2006-10-02 AT AT06831259T patent/ATE535701T1/de active
- 2006-10-02 EP EP06831259A patent/EP1934458B1/fr not_active Not-in-force
- 2006-10-02 WO PCT/FR2006/050973 patent/WO2007039700A1/fr active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2007039700A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP1934458B1 (fr) | 2011-11-30 |
FR2891589A1 (fr) | 2007-04-06 |
ATE535701T1 (de) | 2011-12-15 |
WO2007039700A1 (fr) | 2007-04-12 |
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