EP3108194A1 - Caloporteur de gaz d'échappement - Google Patents
Caloporteur de gaz d'échappementInfo
- Publication number
- EP3108194A1 EP3108194A1 EP15703771.4A EP15703771A EP3108194A1 EP 3108194 A1 EP3108194 A1 EP 3108194A1 EP 15703771 A EP15703771 A EP 15703771A EP 3108194 A1 EP3108194 A1 EP 3108194A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- coolant
- flow
- heat exchanger
- exhaust gas
- gas heat
- 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
- F28D7/16—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
-
- 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
- F02M26/32—Liquid-cooled heat exchangers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/026—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits
- F28F9/0265—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits by using guiding means or impingement means inside the header box
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/026—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits
- F28F9/028—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits by using inserts for modifying the pattern of flow inside the header box, e.g. by using flow restrictors or permeable bodies or blocks with channels
-
- 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
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D21/0001—Recuperative heat exchangers
- F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases
Definitions
- the present invention relates to an exhaust gas heat exchanger according to the preamble of claim 1.
- exhaust gas coolers are used in this context, which are thermally loaded to a high degree by the combustion exhaust gases introduced. The latter can reach temperatures of up to 700 ° C. during operation of the internal combustion engine.
- an exhaust gas heat exchanger with a tube bundle with exhaust-carrying pipes is known, wherein the same bundle of pipes is gripped in each case on the input and output side.
- the tube bundle is surrounded by a through-flow of coolant housing, which thus encloses the tube bundle and the end face is bounded by the two floors.
- a coolant inlet and a coolant outlet are provided for coolant supply and removal.
- Other constructed in a similar manner exhaust gas heat exchanger are known for example from US 2003/0010479 A1 and CN 2018841 17 U.
- a coolant usually flows straight through a pipe into a housing in which a tube bundle transporting combustion gases is arranged and which is delimited on the front side by two plates.
- the inflowing coolant flows into the housing in a predetermined pipe direction and is distributed undefined.
- Due to the undefined distribution of the coolant it is possible for regions to flow through less well, in particular in the region of a bottom, so that there is the risk of local boiling, as a result of which the service life of the exhaust gas heat exchanger is reduced.
- Due to the lack of space a coolant inlet can not usually be mounted directly in the region of the bottom, so that the coolant has the natural tendency to flow away from the primarily to be cooled ground.
- the hot combustion exhaust gas is introduced into the tube bundle, so that there is the danger of local boiling especially in this area.
- the present invention addresses the problem of providing an improved embodiment for an exhaust gas heat exchanger of the generic type, which in particular prevents or at least minimizes the risk of local boiling.
- the present invention is based on the general idea of directing a coolant flow to be introduced into an exhaust gas heat exchanger by means of a corresponding flow directing device to boiling points and thereby achieving optimum cooling in these areas and at the same time the risk of local boiling, which increases in these areas, at least reduce.
- the exhaust gas heat exchanger according to the invention has a tube bundle with exhaust-carrying tubes, which is gripped on the input side and on the output side in each case in a bottom.
- the tube bundle is enclosed by a housing through which coolant flows, which end face is bounded by the two floors and has a coolant inlet and a coolant outlet.
- a diffuser Upstream of the input-side bottom, a diffuser is usually provided, which supplies the hot exhaust gases emitted by the internal combustion engine. These hot combustion exhaust gases impinge directly on the input-side soil, which exposes it to extreme temperature loads.
- a flow-guiding device is arranged in the region of the coolant inlet, which directs the coolant to the places at risk of segregation of the housing, namely to the ground on the input side, where it provides locally enhanced cooling.
- the at least one flow-guiding element is designed, in particular shaped or oriented, such that it effects a change in direction of the coolant flow of approximately 0 ° ⁇ ⁇ 90 °, in particular of approximately 15 ° ⁇ ⁇ 42 °.
- the exhaust gas heat exchanger By the targeted inflow of the coolant in the exhaust gas heat exchanger not only a local boiling in the region of the input side soil can be avoided, but in addition also the temperature stress occurring there can be reduced, whereby the life of the exhaust gas heat exchanger can be increased.
- the exhaust gas heat exchanger according to the invention can be significantly reduced. Refrigerant flow are cooled, whereby, for example, a pump power and a flow rate of coolant can be reduced.
- the flow-guiding device is arranged on a coolant tube which opens into the coolant inlet.
- the arrangement of the flow guide outside of the actual exhaust gas heat exchanger offers the great advantage that its structural components, such as the housing, can remain unchanged. As a result, in particular complex changes in geometry in the housing tool can be avoided.
- the flow guide may for example be formed integrally with the coolant tube or separately welded to this and with this, soldered or screwed.
- the one-piece design offers the great advantage that the coolant tube and the flow can be made as a metallic casting, whereby the provision of Strömungsleit Huawei invention requires only a single conversion of the casting tool for the coolant tube.
- the manufacturing flexibility increases, so that coolant tubes for different exhaust-gas heat exchangers can be equipped with different flow-guiding devices.
- the flow guide is in turn arranged externally to the exhaust gas heat exchanger to a feed nozzle, which is connected to the coolant inlet.
- the flow-guiding device is either integral with the supply pipe. can be formed, in particular in the manner of a metallic casting, or subsequently connected thereto.
- the flow-guiding device has at least one flow-guiding element, which is adjustable or pivotable.
- an adjustable or pivotable flow-guiding element can either be actively adjusted, for example by means of a corresponding adjusting device, or passively, for example as a function of a flow pulse of the coolant.
- the flow guide is pivotally mounted and biased by a spring in a first end position. As a function of the flow impulse of the coolant, the flow guide element is now adjustable against the spring force up to a second end position.
- Such a variable design offers the possibility of optimum flow of the input-side bottom with low coolant flow rates, as well as a limitation of the pressure loss at high coolant flow rates through the self-adjusting cross-sectional change and the yielding flow guide. It is particularly advantageous, instead of the spring, to design the flow guide element as a spring plate and / or as a bent sheet-metal element under prestressing, which is connected on one side to the inner wall of the coolant connection and which bends depending on the flow impulse.
- FIG. 4b is a representation as in Fig. 4a, but with a flow element in its second end position
- an exhaust gas heat exchanger 1 has a tube bundle 2 with exhaust-carrying tubes 3, wherein the tube bundle 2 is gripped on the input side and on the output side respectively in a bottom 4, 5.
- the exhaust gas heat exchanger 1 according to the invention has a housing 7, which flows through a coolant 6 and encloses the tube bundle 2 and is delimited by the two floors 4, 5.
- the housing 7 has a coolant inlet 8 and a coolant outlet 9.
- a flow-guiding device 10 is now arranged in the area of the coolant inlet 8 with a flow-guiding element 1 1, which seals the coolant 6 at siede-vulnerable points of the housing 7, namely in this case at the input-side bottom 4 , distracts.
- the input-side bottom 4 is exposed to an extremely high temperature load and requires increased cooling.
- Fig. 1 it can be seen that the flow guide 10 and the flow guide 1 1 are arranged on a coolant pipe 14, which opens into the coolant inlet 8.
- the flow guide element 1 1 protrudes into the housing 7 of the exhaust gas heat exchanger 1 and causes the required deflection of the coolant flow 6 in the direction of the gang stoolen bottom 4, whereby this effectively cooled and in particular the risk of local boiling can be minimized at least.
- the flow-guiding device 10 and with it also the flow-guiding element 1 1 can be formed integrally with the coolant tube 14, in particular if this is produced, for example, as a metallic casting.
- the flow guide 10 or the flow guide 1 1 made separately to the coolant tube 14 and then connected to this, for example clipped, glued, welded, soldered or pressed.
- the flow guide 1 1 separately to the coolant pipe 14 is formed and a tube 15 in a corresponding pipe on the coolant at the corresponding flow 14 provided opening 16 is inserted. Due to the complementary design of the opening 16 and the associated nose 15 on the flow guide 1 1 can already be a precise alignment of the flow guide 1 1 forced. A fixation of the same on the coolant tube 14 can be done for example by the above-described soldering or welding. Of course, alternatively, a pressing of the nose 15 in the opening 16 is conceivable.
- the flow guide 1 1 can be formed in particular channel-shaped, as can be seen according to the illustrations in FIG. 3.
- the flow guide 1 1 has an engagement length L between 2.0 and 30 mm, more preferably an engagement length L between 2.0 and 10 mm. About this engagement length engages the flow guide 1 1 in the housing 7 of the exhaust gas heat exchanger 1 (see, in particular Fig. 2). If one looks at the flow-guiding device 10 from FIGS. 4a and 4b, it can be seen that in this case the at least one flow-guiding element 1 1 is designed to be adjustable or pivotable, in this case pivotable about an axis A. For adjusting the flow guide 1 1, for example, a not shown adjusting device may be used, which causes an active adjustment of the flow guide 1 1.
- the flow guide 1 1 is pivotally mounted and biased by a spring 17 in a first end position (see Fig .. 4a).
- the flow guide 1 1 is adjustable in response to the flow pulse of the coolant 6 against the spring force of the spring 17 to a second end position shown in FIG. 4b.
- Such a possibility of adjustment offers the great advantage that at a low coolant volume flow optimum flow and thus cooling of the input side bottom 4 can be achieved, whereas at a high coolant volume flow limitation of the pressure loss is achieved by dodging the pivotally mounted flow guide 1 1.
- the flow guide 1 1 is unilaterally connected to the coolant pipe 14 and flow-dependent adjustable between a first and second end position. It is thus not pivotable about the axis A, but can only be bent due to its resilient design in response to the flow pulse of the coolant 6.
- the flow guide 1 1 is thus formed in the manner of a unilaterally connected spring plate.
- Such a flow guide 10 can dispense entirely with the spring 17 and is therefore particularly preferred.
- This embodiment also offers the great advantage that, given a low coolant volume flow, optimal flow and thus cooling of the input-side bottom 4 can be achieved, whereas with a high coolant volume flow limitation of the pressure loss through elastic bending of the unilaterally connected flow guide 1 1 is achieved.
- Such a resilient flow guide 1 1 can be comparatively simple and inexpensive to produce sheet metal stamping and is therefore predestined for use in the exhaust gas heat exchanger 1 according to the invention.
- a connection of the flow guide 1 1 to the coolant tube 14 can be done in a simple manner cohesively, for example by welding or soldering, with an adhesive or other mechanical connection, such as a clip or compression are conceivable. Especially the latter are advantageous because there is no heat input and therefore no delay is to be feared.
- FIGS. 5a to 5c are also considered, a flow-directing device 10 can be seen in the latter, which is arranged on a supply pipe 18.
- the flow guide element 1 1 inserted into the feed connection 18 can have an almost arbitrary opening angle ⁇ and any desired orientation.
- the opening angle ß is to be adapted in terms of its size and orientation to a corresponding application, wherein the opening angle ß can be between 90 and 310 °, in particular between 140 ° and 230 °.
- the flow guide 1 1 additional, not shown openings for targeted regulation of the outflow and the amount of the coolant 6 have. These openings can also be designed as slots and / or holes.
- a change in direction of the coolant flow 6 are forced upon entry into the housing 7, wherein the change in direction between 0 ° ⁇ ⁇ 90 °, preferably between 15 ° ⁇ ⁇ 42 °.
- the length L of the flow guide 1 1 can be 2mm ⁇ L ⁇ 30mm, in particular 2mm ⁇ L ⁇ 10mm.
- the life of the exhaust gas heat exchanger 1 according to the invention can be increased. Due to the fact that the flow guiding device 10 is arranged, for example, in the coolant pipe 14 or in the feed pipe 18, the housing 7 of the exhaust gas heat exchanger 1 can remain unchanged, so that the same tools can continue to be used for the production.
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)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014202447.1A DE102014202447A1 (de) | 2014-02-11 | 2014-02-11 | Abgaswärmeübertrager |
PCT/EP2015/052426 WO2015121148A1 (fr) | 2014-02-11 | 2015-02-05 | Caloporteur de gaz d'échappement |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3108194A1 true EP3108194A1 (fr) | 2016-12-28 |
EP3108194B1 EP3108194B1 (fr) | 2018-05-02 |
Family
ID=52465362
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15703771.4A Not-in-force EP3108194B1 (fr) | 2014-02-11 | 2015-02-05 | Caloporteur de gaz d'échappement |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3108194B1 (fr) |
DE (1) | DE102014202447A1 (fr) |
WO (1) | WO2015121148A1 (fr) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014219078A1 (de) * | 2014-09-22 | 2016-03-24 | Mahle International Gmbh | Vorrichtung zur Zuführung eines Kühlmittels zu einem Wärmeübertrager, vorzugsweise für einen Abgaskühler eines Verbrennungsmotors eines Kraftfahrzeuges |
DE102014226883A1 (de) * | 2014-12-22 | 2016-06-23 | Mahle International Gmbh | Wärmeübertrager |
ES2632687B1 (es) * | 2016-03-14 | 2018-06-25 | Valeo Térmico, S. A. | Intercambiador de calor para gases, en especial de los gases de escape de un motor |
EP3246647B1 (fr) | 2016-05-19 | 2019-10-30 | Borgwarner Emissions Systems Spain, S.L.U. | Dispositif d'échange de chaleur |
EP3309381B1 (fr) * | 2016-10-13 | 2020-03-04 | Mahle International GmbH | Refroidisseur de gaz d'échappement récirculés pour un moteur à combustion interne |
DE102017206201A1 (de) | 2016-10-13 | 2018-04-19 | Mahle International Gmbh | Abgasrückführkühler für eine Brennkraftmaschine |
EP3309494B1 (fr) * | 2016-10-13 | 2021-04-28 | HS Marston Aerospace Limited | Échangeur de chaleur |
DE102017218254A1 (de) * | 2017-10-12 | 2019-04-18 | Mahle International Gmbh | Abgaswärmeübertrager |
EP3786567A1 (fr) * | 2019-08-26 | 2021-03-03 | Valeo Termico S.A. | Refroidisseur egr |
EP3786562B1 (fr) * | 2019-08-28 | 2023-03-29 | Valeo Termico S.A. | Refroidisseur à recirculation de gaz d'échappement |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE29714361U1 (de) * | 1996-08-05 | 1997-12-04 | Joh. Vaillant Gmbh U. Co, 42859 Remscheid | Schichtenspeicher |
US5732688A (en) * | 1996-12-11 | 1998-03-31 | Cummins Engine Company, Inc. | System for controlling recirculated exhaust gas temperature in an internal combustion engine |
JPH1113550A (ja) * | 1997-06-23 | 1999-01-19 | Isuzu Motors Ltd | Egrクーラ |
JPH1113549A (ja) * | 1997-06-23 | 1999-01-19 | Isuzu Motors Ltd | Egrクーラ |
FR2792968B1 (fr) * | 1999-04-29 | 2001-06-29 | Westaflex Automobile | Echangeur thermique en plastique et acier destine a etre dispose dans un circuit d'admission d'air d'un moteur, notamment dans un repartiteur comportant deux chambres et element du circuit d'admission d'air d'un moteur |
US7077190B2 (en) | 2001-07-10 | 2006-07-18 | Denso Corporation | Exhaust gas heat exchanger |
ATE385540T1 (de) * | 2002-05-15 | 2008-02-15 | Behr Gmbh & Co Kg | Abgaswärmetauscher mit ventil |
DE10312788A1 (de) * | 2003-03-21 | 2004-09-30 | Behr Gmbh & Co. Kg | Abgaswärmetauscher und Dichteinrichtung für Abgaswärmetauscher |
CA2443496C (fr) * | 2003-09-30 | 2011-10-11 | Dana Canada Corporation | Echangeurs de chaleur a faisceau comprenant des tubes a extremite de section elargie |
DE20316688U1 (de) * | 2003-10-29 | 2004-03-11 | Behr Gmbh & Co. Kg | Wärmetauscher |
DE102010012192A1 (de) * | 2010-03-19 | 2011-09-22 | Pierburg Gmbh | Kühlmitteleinlassstutzen für einen Wärmetauscher |
CN201884117U (zh) | 2010-12-22 | 2011-06-29 | 中国重汽集团济南动力有限公司 | 发动机用egr冷却器 |
JP5988296B2 (ja) * | 2011-08-10 | 2016-09-07 | 臼井国際産業株式会社 | 多管式熱交換器 |
DE102011081031A1 (de) | 2011-08-16 | 2013-02-21 | Behr Gmbh & Co. Kg | Abgaswärmeübertrager |
DE102013100885B4 (de) * | 2013-01-29 | 2020-02-27 | Benteler Automobiltechnik Gmbh | Wärmetauscher für ein Kraftfahrzeug |
-
2014
- 2014-02-11 DE DE102014202447.1A patent/DE102014202447A1/de not_active Withdrawn
-
2015
- 2015-02-05 EP EP15703771.4A patent/EP3108194B1/fr not_active Not-in-force
- 2015-02-05 WO PCT/EP2015/052426 patent/WO2015121148A1/fr active Application Filing
Also Published As
Publication number | Publication date |
---|---|
EP3108194B1 (fr) | 2018-05-02 |
WO2015121148A1 (fr) | 2015-08-20 |
DE102014202447A1 (de) | 2015-08-13 |
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