WO2018225078A1 - Charge-air cooler for a fresh-air system of an internal combustion engine - Google Patents

Charge-air cooler for a fresh-air system of an internal combustion engine Download PDF

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Publication number
WO2018225078A1
WO2018225078A1 PCT/IN2017/050225 IN2017050225W WO2018225078A1 WO 2018225078 A1 WO2018225078 A1 WO 2018225078A1 IN 2017050225 W IN2017050225 W IN 2017050225W WO 2018225078 A1 WO2018225078 A1 WO 2018225078A1
Authority
WO
WIPO (PCT)
Prior art keywords
air
charge
housing
circumferential wall
heat exchanger
Prior art date
Application number
PCT/IN2017/050225
Other languages
French (fr)
Inventor
Mahesh MOHITE
Ellen Hohmann
Original Assignee
Mahle Behr India Private Limited
Mahle International Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mahle Behr India Private Limited, Mahle International Gmbh filed Critical Mahle Behr India Private Limited
Priority to PCT/IN2017/050225 priority Critical patent/WO2018225078A1/en
Publication of WO2018225078A1 publication Critical patent/WO2018225078A1/en

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Classifications

    • 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
    • F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
    • F02B29/04—Cooling of air intake supply
    • F02B29/045—Constructional details of the heat exchangers, e.g. pipes, plates, ribs, insulation, materials, or manufacturing and assembly
    • F02B29/0475—Constructional details of the heat exchangers, e.g. pipes, plates, ribs, insulation, materials, or manufacturing and assembly the intake air cooler being combined with another device, e.g. heater, valve, compressor, filter or EGR cooler, or being assembled on a special engine location
    • 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
    • F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
    • F02B29/04—Cooling of air intake supply
    • 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
    • F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
    • F02B29/04—Cooling of air intake supply
    • F02B29/045—Constructional details of the heat exchangers, e.g. pipes, plates, ribs, insulation, materials, or manufacturing and assembly
    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10242—Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
    • F02M35/10268—Heating, cooling or thermal insulating means
    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10242—Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
    • F02M35/10295—Damping means, e.g. tranquillising chamber to dampen air oscillations
    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
    • F02M35/1255—Intake silencers ; Sound modulation, transmission or amplification using resonance
    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
    • F02M35/1288—Intake silencers ; Sound modulation, transmission or amplification combined with or integrated into other devices ; Plurality of air intake silencers
    • 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

  • TITLE CHARGE-AIR COOLER FOR A FRESH-AIR SYSTEM OF AN INTERNAL COMBUSTION ENGINE
  • the present invention relates to a charge-air cooler for a fresh-air system of an internal combustion engine and to a fresh-air system having such a charge -air cooler.
  • a fresh-air system for an internal combustion engine usually comprises a fresh air tract for guiding and for defining a fresh air path.
  • fresh air flows along the fresh air path through the fresh air tract to the combustion chambers of the internal combustion engine.
  • a charging device such as a compressor of an exhaust gas turbocharger, for example, is arranged in the fresh-air system.
  • so-called shunt resonators which are coupled fluidically and acoustically to the fresh air tract of the fresh-air system.
  • DE 20 2005 01 1 669 Ul discloses a shunt resonator for an intake line of internal combustion engine.
  • the shunt resonator has a cavity which is connected to the intake line via a tube -like connection.
  • an element consisting of a porous material, which reduces acoustic resonator peaks caused by the shunt resonator.
  • the present invention therefore deals with the problem, for a charge-air cooler having a shunt resonator of the generic type, of specifying an improved or at least alternative embodiment which is distinguished in particular by a compact design and thus by a particularly low requirement for installation space with simultaneously low production costs.
  • the basic idea of the invention is accordingly to integrate a shunt resonator for sound damping directly into an air distributor for distributing the charge air to be cooled to the fluid paths present in a heat exchanger of the charge-air cooler.
  • the cavity required to form the shunt resonator is enclosed by two housing parts, which simultaneously also form the entire air distributor for distributing the charge air to the heat exchanger of the charge-air cooler.
  • a particularly compactly constructed air distributor with integrated shunt resonator can be devised, which in addition is also constructed very simply in design terms, which results in not inconsiderable cost advantages in production.
  • separate housing parts for implementing the shunt resonator in addition to those housing parts which also form the air distributor are superfluous.
  • this property of the charge-air cooler according to the invention is associated with considerable cost advantages.
  • the air distributor has an air distributor housing having a first and a second housing part, wherein the first housing part is fixed to the heat exchanger housing.
  • the first housing part is preferably fixed detachably to the heat exchanger housing.
  • the second housing part is permanently connected to the first housing part by means of an integral connection, particularly by a welded joint.
  • the two housing parts enclose a resonator cavity for forming a resonator for the charge air flowing through the air distributor.
  • a shunt resonator is therefore formed by the resonator cavity.
  • the resonator cavity is delimited exclusively by the two housing parts. Providing further housing parts for forming or delimiting the resonator cavity can therefore be dispensed within this embodiment. This results in additional advantages with respect to the production costs of the charge-air cooler.
  • the first housing part comprises a first circumferential wall, which partially encloses an air distributor interior.
  • the first circumferential wall is formed so as to be open on a front side facing the heat exchanger and is fixed to the heat exchanger housing.
  • an air inlet opening for introducing the charge air into the air distributor interior is provided on a front side facing the second housing part.
  • at least one passage opening, through which the air distributor interior communicates fluidically with the resonator cavity, is formed in the first circumferential wall.
  • passage openings there are at least two passage openings, preferably a multiplicity of passage openings, in the first circumferential wall, which are arranged at a distance from one another along a circumferential direction of the first circumferential wall. If multiple passage openings are provided, then these can be arranged uniformly, that is to say with respectively equidistant two passage openings adjacent in the circumferential direction, at a distance or non-uniformly along the circumferential direction. In the latter case, at least two passage openings adjacent to each other in the circumferential direction are at a different distance from each other.
  • the number, geometry and arrangement of the passage opening can be chosen in an application-specific manner such that, with the aid of the shunt resonator, particularly effective sound damping is achieved. In this connection, simulation calculations have shown that very good sound damping properties can be achieved for a large number of different configurations.
  • the at least one passage opening is formed in the manner of a slot.
  • the passage opening is formed by an elongated slot, which extends along the circumferential direction, that is to say transversely with respect to the axial direction.
  • Such a slot-like geometry of the passage opening(s) requires particularly little installation space in the axial direction of the two housing parts.
  • the first circumferential wall tapers away from the heat exchanger, at least in some sections.
  • installation space for the resonator cavity is available radially outside the first circumferential wall.
  • the resonator cavity is separated directly from the air distributor interior by the first circumferential wall. This measure ensures that only little installation space is required.
  • the second housing part comprises a hood -like housing wall, so that the resonator cavity is delimited and enclosed radially on the inside by the first circumferential wall and radially on the outside by the hood-like housing wall.
  • the formation of unnecessary interspaces between the air distributor interior and the resonator cavity is avoided in this way.
  • a particularly compactly constructed charge-air cooler is implemented.
  • the resonator cavity is therefore arranged annularly on the outside around the air distributor interior.
  • the hood -like housing wall of the second housing part merges away from the heat exchanger into a second circumferential wall, which extends the first circumferential wall of the first housing part away from the heat exchanger.
  • the second circumferential wall has an air inlet opening on a front side facing away from the heat exchanger.
  • the first circumferential wall and the second circumferential wall are formed so as to be curved along a common axial direction of the two circumferential walls and preferably have curvature directions opposite to each other.
  • the second circumferential wall is formed so as to be open on a front side opposite the inlet opening.
  • a first fixing edge projects radially outward on the first circumferential wall and is connected integrally to a second fixing edge which projects radially outward from the hood-like housing wall.
  • This integral connection can preferably be a welded connection.
  • the two housing parts can be fixed permanently and stably to one another particularly simply and thus economically, for example by means of laser welding.
  • the two circumferential walls rest on each other with their mutually facing front sides.
  • the charge air that has entered the second housing part through the air inlet opening can be led in a particularly simple way into the first housing part and into the distributor housing interior and then distributed from there to the fluid paths present in the heat exchanger.
  • At least one of the two housing parts is produced from a plastic, preferably from a thermoplastic, most preferably from polyamide. Particularly expediently, this applies both to the first housing part and to the second housing part.
  • the use of plastic housing parts has an advantageous effect on the fabrication costs.
  • the two housing parts can be connected integrally to each other particularly simply and permanently in this case.
  • the invention relates further to a fresh- air system for an internal combustion engine having a charge-air cooler presented above. The previously explained advantages of the charge-air cooler according to the invention therefore also transfer to the fresh-air system.
  • Fig. 1 shows an example of a charge-air cooler according to the invention in an assembled state
  • Fig. 2 shows an exploded illustration of the charge-air cooler
  • FIG. 1 shows an example of a charge-air cooler 1 according to the invention for a fresh-air system of an internal combustion engine in an assembled state.
  • Figure 2 shows the components of the charge-air cooler 1 that are important to the invention in a separate illustration.
  • the charge-air cooler 1 comprises a heat exchanger 2 having a heat exchanger housing 3, in which a plurality of fluid paths 4 are provided for the charge air 5 to be cooled to flow through.
  • the heat exchanger 2 can be constructed in the manner of a stacked -plate heat exchanger, through which the charge air 5 and, fluidically separated from the latter, a coolant can flow.
  • the fluid paths 4 through which the charge air can flow alternate along a stack direction S with coolant paths 6, through which the coolant can flow.
  • the heat exchanger housing 3 comprises multiple housing side walls 22 (in the isometric view of the figures, only two of these housing walls 22 can be seen) made of a metal, preferably of aluminium.
  • the charge-air cooler 1 comprises an air distributor 7, which communicates fluidically with the fluid paths 4.
  • the air distributor 7 comprises an air distributor housing 8 having a first and a second housing part 9a, 9b, wherein the first housing part 9a is fixed - preferably detachably - to the heat exchanger housing 3.
  • the heat exchanger housing 3 can have a housing base 23, of which only an outer edge 24 can be seen in the figures.
  • the first housing part 9a can be fixed by means of a flange section 35, which in turn can be formed to be complementary to the outer edge 24 of the housing base 23.
  • a sealing element can be arranged between the first housing part 9a and the housing base 21.
  • the charge-air cooler 1 can also be equipped with an air collector opposite the air distributor 7, in which the charge air 5 is collected again after flowing through the individual fluid paths 4 of the heat exchanger 2. Since such an air collector is not part of the present invention and the construction of such an air collector of a charge-air cooler 1 additionally belongs to the expertise of the relevant person skilled in the art, the constructional implementation of such an air collector, and also the constructional details relating to the construction of the heat exchanger 2, will not be discussed further below.
  • Both housing parts 9a, 9b enclose a resonator cavity 10, which forms a shunt resonator for the charge air led into the heat exchanger 2 through the air distributor 7.
  • the resonator cavity 10 is delimited exclusively by the two housing parts 9a, 9b.
  • the resonator cavity 10 can, for example, have a volume of about 0.25 litres. Obviously, however, in variants other suitable values for the volume of the resonator cavity 10 are also possible.
  • the first housing part 9a comprises a first circumferential wall 11 , which partially encloses an air distributor interior 12.
  • the first circumferential wall 11 is formed so as to be open on the front side 13 facing the heat exchanger 2 and is fixed to the heat exchanger housing 3.
  • An air inlet opening 26 for introducing the charge air 5 into the air distributor interior 12 is arranged on the front side 14 of the first circumferential wall 11 that faces the second housing part 9b.
  • the first circumferential wall 11 tapers away from the heat exchanger 2 and from the heat exchanger housing 3 towards the second housing part 9b.
  • the second housing part 9b comprises a hood-like housing wall 16, so that the resonator cavity 10 is delimited radially on the inside by the first circumferential wall 11 and radially on the outside by the said hood -like housing wall 16.
  • the resonator cavity 10 is therefore arranged annularly around the distributor interior 12, according to Figure 1.
  • the hood -like housing wall 16 of the second housing part 9b merges away from the heat exchanger 2 into a second circumferential wall 15.
  • the hood -like housing wall 16 and the second circumferential wall 15 are preferably moulded integrally on each other or formed in one part.
  • the second circumferential wall 15 extends the first circumferential wall 11 of the first housing part 9a away from the heat exchanger 2 and, on a front side 17 facing away from the heat exchanger, has an air inlet opening 19. As can be seen from Figures 1 and 2, the second circumferential wall 15 is formed so as to be open on the front side 18 opposite the inlet opening 19.
  • the first and the second circumferential wall 11, 15 are formed so as to be curved along a common axial direction A of the two circumferential walls 11 , 15, with curvature directions opposite to each other.
  • the axial direction A is defined by a central longitudinal axis (not shown) in the region of the two circumferential walls 1 1, 15 in which these have a high cylindrical geometry.
  • the axial direction A extends parallel to the central longitudinal axis.
  • the circumferential direction U runs around the central longitudinal axis.
  • the stack direction S of the heat exchanger 2 runs at right angles to the axial direction A.
  • the two housing parts 9a, 9b of the air distributor 7 can be produced from a plastic, preferably from a thermoplastic, most preferably from polyamide.
  • the second housing part 9b can be connected permanently to the first housing part 9a by means of an integral connection.
  • the first housing part 9a is welded to the second housing part 9b.
  • a first fixing edge 20a projects outwards and is connected integrally to a second fixing edge 20b which projects outwards from the hood-like housing wall 16.
  • Such a welded connection can be produced, for example, by means of laser welding.
  • passage openings 21 through which the air distributor interior 12 communicates iluidically with the resonator cavity 10, are additionally formed in the first circumferential wall 11.
  • the two circumferential walls 11 , 15 rest on each other with their mutually facing front sides 14, 18.
  • six passage openings 21 are arranged in the first circumferential wall 11, arranged uniformly, that is to say spaced apart equidistantly from one another, along a circumferential direction U of the first circumferential wall 11.
  • a non-uniform arrangement of the passage openings 21 is also conceivable.
  • the passage openings 21 can be formed in the manner of slots, as illustrated. In the example of the figures, all the passage openings 21 have the same dimensions. In variants that are not shown, two or more passage openings 21 can also have different dimensions.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

The invention relates to a charge-air cooler (1) for a fresh-air system of an internal combustion engine, - having a heat exchanger (2) which comprises a heat exchanger housing, in which multiple fluid paths (4) for the charge air (5) to be cooled to flow through are formed, - having an air distributor (7) communicating fluidically with the fluid paths (4) for distributing the charge air to the fluid paths (4), - wherein the air distributor (7) comprises an air distributor housing (8) having a first and a second housing part (9a, 9b), - wherein the first housing part (9a) is fixed to the heat exchanger housing (3) and the second housing part (9b) is integrally connected to the first housing part (9a), - wherein the two housing parts (9a, 9b) enclose a resonator cavity (10) for forming a shunt resonator for the charge air (5) flowing through the air distributor (7).

Description

TITLE : CHARGE-AIR COOLER FOR A FRESH-AIR SYSTEM OF AN INTERNAL COMBUSTION ENGINE
The present invention relates to a charge-air cooler for a fresh-air system of an internal combustion engine and to a fresh-air system having such a charge -air cooler.
A fresh-air system for an internal combustion engine usually comprises a fresh air tract for guiding and for defining a fresh air path. During operation of the internal combustion engine, fresh air flows along the fresh air path through the fresh air tract to the combustion chambers of the internal combustion engine. In the case of a turbocharged internal combustion engine, a charging device, such as a compressor of an exhaust gas turbocharger, for example, is arranged in the fresh-air system. in order to improve the damping of sound in the fresh-air system, the prior art knows so-called shunt resonators, which are coupled fluidically and acoustically to the fresh air tract of the fresh-air system.
Thus, for example, DE 20 2005 01 1 669 Ul discloses a shunt resonator for an intake line of internal combustion engine. The shunt resonator has a cavity which is connected to the intake line via a tube -like connection. Arranged within the tube-like connection is an element consisting of a porous material, which reduces acoustic resonator peaks caused by the shunt resonator.
The not inconsiderable requirement for installation space for such a resonator, which is available to an only limited extent in the engine compartment of a motor vehicle, proves to be disadvantageous in such conventional shunt resonators for fresh -air systems. The present invention therefore deals with the problem, for a charge-air cooler having a shunt resonator of the generic type, of specifying an improved or at least alternative embodiment which is distinguished in particular by a compact design and thus by a particularly low requirement for installation space with simultaneously low production costs.
This object is achieved by the subject matter of the independent patent claims. Preferred embodiments are the subject matter of the dependent patent claims.
The basic idea of the invention is accordingly to integrate a shunt resonator for sound damping directly into an air distributor for distributing the charge air to be cooled to the fluid paths present in a heat exchanger of the charge-air cooler. According to the invention, the cavity required to form the shunt resonator is enclosed by two housing parts, which simultaneously also form the entire air distributor for distributing the charge air to the heat exchanger of the charge-air cooler. In this way, a particularly compactly constructed air distributor with integrated shunt resonator can be devised, which in addition is also constructed very simply in design terms, which results in not inconsiderable cost advantages in production. In particular, separate housing parts for implementing the shunt resonator in addition to those housing parts which also form the air distributor are superfluous. In addition, this property of the charge-air cooler according to the invention is associated with considerable cost advantages.
A charge-air cooler according to the invention for a fresh-air system of an internal combustion engine comprises a heat exchanger having a heat exchanger housing, in which multiple fluid paths for the charge air to be cooled to flow through are formed. Furthermore, the charge-air cooler comprises an air distributor communicating fluidically with the fluid paths for distributing the charge air to the individual fluid paths. For this purpose, the air distributor has an air distributor housing having a first and a second housing part, wherein the first housing part is fixed to the heat exchanger housing. The first housing part is preferably fixed detachably to the heat exchanger housing. The second housing part, on the other hand, is permanently connected to the first housing part by means of an integral connection, particularly by a welded joint. According to the invention, the two housing parts enclose a resonator cavity for forming a resonator for the charge air flowing through the air distributor.
Preferably, a shunt resonator is therefore formed by the resonator cavity.
According to a preferred embodiment, the resonator cavity is delimited exclusively by the two housing parts. Providing further housing parts for forming or delimiting the resonator cavity can therefore be dispensed within this embodiment. This results in additional advantages with respect to the production costs of the charge-air cooler.
In an advantageous development, the first housing part comprises a first circumferential wall, which partially encloses an air distributor interior. In this variant, the first circumferential wall is formed so as to be open on a front side facing the heat exchanger and is fixed to the heat exchanger housing. In the first circumferential wall, an air inlet opening for introducing the charge air into the air distributor interior is provided on a front side facing the second housing part. In addition to the inlet opening, at least one passage opening, through which the air distributor interior communicates fluidically with the resonator cavity, is formed in the first circumferential wall. In an advantageous development, there are at least two passage openings, preferably a multiplicity of passage openings, in the first circumferential wall, which are arranged at a distance from one another along a circumferential direction of the first circumferential wall. If multiple passage openings are provided, then these can be arranged uniformly, that is to say with respectively equidistant two passage openings adjacent in the circumferential direction, at a distance or non-uniformly along the circumferential direction. In the latter case, at least two passage openings adjacent to each other in the circumferential direction are at a different distance from each other. The number, geometry and arrangement of the passage opening can be chosen in an application-specific manner such that, with the aid of the shunt resonator, particularly effective sound damping is achieved. In this connection, simulation calculations have shown that very good sound damping properties can be achieved for a large number of different configurations.
According to a further preferred embodiment, the at least one passage opening is formed in the manner of a slot. In this case, the passage opening is formed by an elongated slot, which extends along the circumferential direction, that is to say transversely with respect to the axial direction. Such a slot-like geometry of the passage opening(s) requires particularly little installation space in the axial direction of the two housing parts.
In an advantageous development, the first circumferential wall tapers away from the heat exchanger, at least in some sections. Thus, installation space for the resonator cavity is available radially outside the first circumferential wall. Particularly advantageously, therefore, the resonator cavity is separated directly from the air distributor interior by the first circumferential wall. This measure ensures that only little installation space is required.
Expediently, the second housing part comprises a hood -like housing wall, so that the resonator cavity is delimited and enclosed radially on the inside by the first circumferential wall and radially on the outside by the hood-like housing wall. This results in a cavity volume with annular geometry, which on the outside adjoins the first circumferential wall of the first housing part. The formation of unnecessary interspaces between the air distributor interior and the resonator cavity is avoided in this way. Thus, a particularly compactly constructed charge-air cooler is implemented. Preferably, since in this way a particularly space -saving arrangement results, the resonator cavity is therefore arranged annularly on the outside around the air distributor interior.
In a further advantageous development, the hood -like housing wall of the second housing part merges away from the heat exchanger into a second circumferential wall, which extends the first circumferential wall of the first housing part away from the heat exchanger. The second circumferential wall has an air inlet opening on a front side facing away from the heat exchanger. Thus, in addition only relatively little installation space is needed for the guidance of the charge air to be cooled through the air distributor and for the subsequent distribution of the charge air to the individual fluid paths of the heat exchanger.
Particularly expediently, the first circumferential wall and the second circumferential wall are formed so as to be curved along a common axial direction of the two circumferential walls and preferably have curvature directions opposite to each other. By means of such a geometry, particularly good sound damping can be achieved in the fresh-air system.
Expediently, the second circumferential wall is formed so as to be open on a front side opposite the inlet opening.
According to another preferred embodiment, a first fixing edge projects radially outward on the first circumferential wall and is connected integrally to a second fixing edge which projects radially outward from the hood-like housing wall. This integral connection can preferably be a welded connection. In the likewise preferred scenario in which a plastic such as polyamide, for example, is used as the material for the two housing parts, the two housing parts can be fixed permanently and stably to one another particularly simply and thus economically, for example by means of laser welding.
Particularly preferably, the two circumferential walls rest on each other with their mutually facing front sides. In this way, the charge air that has entered the second housing part through the air inlet opening can be led in a particularly simple way into the first housing part and into the distributor housing interior and then distributed from there to the fluid paths present in the heat exchanger.
Expediently, at least one of the two housing parts is produced from a plastic, preferably from a thermoplastic, most preferably from polyamide. Particularly expediently, this applies both to the first housing part and to the second housing part. The use of plastic housing parts has an advantageous effect on the fabrication costs. Furthermore, the two housing parts can be connected integrally to each other particularly simply and permanently in this case. The invention relates further to a fresh- air system for an internal combustion engine having a charge-air cooler presented above. The previously explained advantages of the charge-air cooler according to the invention therefore also transfer to the fresh-air system.
Further important features and advantages of the invention can be gathered from the sub-claims, from the drawings and from the associated figure description using the drawings.
It goes without saying that the features mentioned above and those still to be explained below can be used not only in the respectively specified combination but also in other combinations or on their own without departing from the scope of the present invention.
Preferred exemplary embodiments of the invention are illustrated in the drawings and will be explained in more detail in the following description.
In the drawings, in each case schematically:
Fig. 1 shows an example of a charge-air cooler according to the invention in an assembled state,
Fig. 2 shows an exploded illustration of the charge-air cooler from
Figure 1.
Figure 1 shows an example of a charge-air cooler 1 according to the invention for a fresh-air system of an internal combustion engine in an assembled state. Figure 2 shows the components of the charge-air cooler 1 that are important to the invention in a separate illustration. According to Figures 1 and 2, the charge-air cooler 1 comprises a heat exchanger 2 having a heat exchanger housing 3, in which a plurality of fluid paths 4 are provided for the charge air 5 to be cooled to flow through. The heat exchanger 2 can be constructed in the manner of a stacked -plate heat exchanger, through which the charge air 5 and, fluidically separated from the latter, a coolant can flow. For this purpose, the fluid paths 4 through which the charge air can flow alternate along a stack direction S with coolant paths 6, through which the coolant can flow. By means of thermal interaction of the charge air 5 with the coolant, the charge air 5 is cooled, so that, after flowing through the charge-air cooler 1, it can be led into the combustion chambers of the internal combustion engine again at reduced temperature. If the charge-air cooler 1 is used in a motor vehicle, then the coolant used can be the ambient air around the vehicle, in that this is led into the charge-air cooler 1 as airstream and led out of the latter again. The heat exchanger housing 3 according to Figures 1 and 2 comprises multiple housing side walls 22 (in the isometric view of the figures, only two of these housing walls 22 can be seen) made of a metal, preferably of aluminium.
To distribute the charge air 5 to be cooled to the individual fluid paths 4, the charge-air cooler 1 comprises an air distributor 7, which communicates fluidically with the fluid paths 4. The air distributor 7 comprises an air distributor housing 8 having a first and a second housing part 9a, 9b, wherein the first housing part 9a is fixed - preferably detachably - to the heat exchanger housing 3. For this purpose, the heat exchanger housing 3 can have a housing base 23, of which only an outer edge 24 can be seen in the figures. The first housing part 9a can be fixed by means of a flange section 35, which in turn can be formed to be complementary to the outer edge 24 of the housing base 23. A sealing element, not specifically illustrated in the figures, can be arranged between the first housing part 9a and the housing base 21.
In an analogous way to the air distributor 7, the charge-air cooler 1 can also be equipped with an air collector opposite the air distributor 7, in which the charge air 5 is collected again after flowing through the individual fluid paths 4 of the heat exchanger 2. Since such an air collector is not part of the present invention and the construction of such an air collector of a charge-air cooler 1 additionally belongs to the expertise of the relevant person skilled in the art, the constructional implementation of such an air collector, and also the constructional details relating to the construction of the heat exchanger 2, will not be discussed further below.
Both housing parts 9a, 9b enclose a resonator cavity 10, which forms a shunt resonator for the charge air led into the heat exchanger 2 through the air distributor 7. As can be seen from Figure 1, the resonator cavity 10 is delimited exclusively by the two housing parts 9a, 9b. In other words, the provision of additional housing parts for delimiting the resonator cavity 10 is dispensed with. The resonator cavity 10 can, for example, have a volume of about 0.25 litres. Obviously, however, in variants other suitable values for the volume of the resonator cavity 10 are also possible.
According to Figures 1 and 2, the first housing part 9a comprises a first circumferential wall 11 , which partially encloses an air distributor interior 12. The first circumferential wall 11 is formed so as to be open on the front side 13 facing the heat exchanger 2 and is fixed to the heat exchanger housing 3. An air inlet opening 26 for introducing the charge air 5 into the air distributor interior 12 is arranged on the front side 14 of the first circumferential wall 11 that faces the second housing part 9b. The first circumferential wall 11 tapers away from the heat exchanger 2 and from the heat exchanger housing 3 towards the second housing part 9b.
The second housing part 9b comprises a hood-like housing wall 16, so that the resonator cavity 10 is delimited radially on the inside by the first circumferential wall 11 and radially on the outside by the said hood -like housing wall 16. The resonator cavity 10 is therefore arranged annularly around the distributor interior 12, according to Figure 1. The hood -like housing wall 16 of the second housing part 9b merges away from the heat exchanger 2 into a second circumferential wall 15. The hood -like housing wall 16 and the second circumferential wall 15 are preferably moulded integrally on each other or formed in one part. The second circumferential wall 15 extends the first circumferential wall 11 of the first housing part 9a away from the heat exchanger 2 and, on a front side 17 facing away from the heat exchanger, has an air inlet opening 19. As can be seen from Figures 1 and 2, the second circumferential wall 15 is formed so as to be open on the front side 18 opposite the inlet opening 19.
The first and the second circumferential wall 11, 15 are formed so as to be curved along a common axial direction A of the two circumferential walls 11 , 15, with curvature directions opposite to each other. In the exemplary scenario, the axial direction A is defined by a central longitudinal axis (not shown) in the region of the two circumferential walls 1 1, 15 in which these have a high cylindrical geometry. The axial direction A extends parallel to the central longitudinal axis. The circumferential direction U runs around the central longitudinal axis. The stack direction S of the heat exchanger 2 runs at right angles to the axial direction A. The two housing parts 9a, 9b of the air distributor 7 can be produced from a plastic, preferably from a thermoplastic, most preferably from polyamide. The second housing part 9b can be connected permanently to the first housing part 9a by means of an integral connection. Particularly preferably, the first housing part 9a is welded to the second housing part 9b. For this purpose, on the first circumferential wall 1 1, a first fixing edge 20a projects outwards and is connected integrally to a second fixing edge 20b which projects outwards from the hood-like housing wall 16. Such a welded connection can be produced, for example, by means of laser welding.
According to Figures 1 and 2 , passage openings 21 , through which the air distributor interior 12 communicates iluidically with the resonator cavity 10, are additionally formed in the first circumferential wall 11. As can be seen from Figure 1 , the two circumferential walls 11 , 15 rest on each other with their mutually facing front sides 14, 18. By way of example, six passage openings 21 are arranged in the first circumferential wall 11, arranged uniformly, that is to say spaced apart equidistantly from one another, along a circumferential direction U of the first circumferential wall 11. In a variant that is not shown, a non-uniform arrangement of the passage openings 21 is also conceivable. A different number of passage openings 21 is also possible. The passage openings 21 can be formed in the manner of slots, as illustrated. In the example of the figures, all the passage openings 21 have the same dimensions. In variants that are not shown, two or more passage openings 21 can also have different dimensions.

Claims

WE CLAIM:
1. Charge-air cooler (1) for a fresh-air system of an internal combustion engine,
- having a heat exchanger (2) which comprises a heat exchanger housing, in which multiple fluid paths (4) for the charge air (5) to be cooled to flow through are formed,
- having an air distributor (7) communicating fluidically with the fluid paths (4) for distributing the charge air to the fluid paths (4) ,
- wherein the air distributor (7) comprises an air distributor housing (8) having a first and a second housing part (9a, 9b) ,
- wherein the first housing part (9a) is fixed to the heat exchanger housing (3) and the second housing part (9b) is integrally connected to the first housing part (9a) ,
- wherein the two housing parts (9a, 9b) enclose a resonator cavity (10) for forming a resonator for the charge air (5) flowing through the air distributor (7).
2. Charge -air cooler according to Claim 1 ,
characterized in that
a shunt resonator is formed by the resonator cavity (10).
3. Charge -air cooler according to Claim 1 or 2,
characterized in that
the resonator cavity (10) is delimited exclusively by the first and second housing parts (9a, 9b).
4. Charge -air cooler according to one of Claims 1 to 3,
characterized in that - the first housing part (9a) comprises a first circumferential wall (11), which partially encloses an air distributor interior (12),
- the first circumferential wall (11) is formed so as to be open on a front side (13) facing the heat exchanger (2) and is fixed to the heat exchanger housing (8),
- an air inlet opening (26) for introducing the charge air (5) into the air distributor interior (12) is provided in the first circumferential wall (1 1) on a front side (14) facing the second housing part (9b) ,
- at least one passage opening (21), through which the air distributor interior (12) communicates fluidically with the resonator cavity (10), is formed in the first circumferential wall (1 1).
5. Charge-air cooler according to one of the preceding claims,
characterized in that
there are at least two passage openings (21), preferably a multiplicity of passage openings, in the first circumferential wall (11), which are arranged at a distance from one another, preferably uniformly or non- uniformly, along a circumferential direction (U) of the first circumferential wall (1 1).
6. Charge- air cooler according to one of the preceding claims,
characterized in that
the at least one passage opening (21) is formed in the manner of a slot.
7. Charge -air cooler according to one of Claims 4 to 6,
characterized in that
the first circumferential wall (11) tapers away from the heat exchanger (2), at least in some sections.
8. Charge -air cooler according to one of Claims 4 to 7, characterized in that
the resonator cavity (10) is arranged annularly around the air distributor interior (12).
9. Charge -air cooler according to one of Claims 4 to 8,
characterized in that
the resonator cavity (10) is separated from the air distributor interior (12) by the first circumferential wall (1 1).
10. Charge-air cooler according to one of the preceding claims,
characterized in that
the second housing part (9b) comprises a hood-like housing wall (16), formed in such a way that the resonator cavity (10) is delimited radially on the inside by the first circumferential wall (11) of the first housing part (9a) and radially on the outside by the hood-like housing wall (16).
11. Charge -air cooler according to Claim 10,
characterized in that
the hood-like housing wall (16) of the second housing part (9b) merges away from the heat exchanger (2) into a second circumferential wall (15), which extends the first circumferential wall (11) of the first housing part (9a) away from the heat exchanger (2) and has an air inlet opening (19) on a front side (17) facing away from the heat exchanger (2).
12. Charge -air cooler according to Claim 1 1,
characterized in that
the first circumferential wall (11) and the second circumferential wall (15) are formed so as to be curved along a common axial direction (A) of the two circumferential walls (1 1, 16), with curvature directions opposite to each other.
13. Charge -air cooler according to Claim 1 1 or 12,
characterized in that
the second circumferential wall (15) is formed so as to be open on a front side (18) opposite the air inlet opening (19).
14. Charge -air cooler according to one of Claims 11 to 13,
characterized in that
a first fixing edge (20a) projects radially outward on the first circumferential wall (11) and is connected integrally to a second fixing edge (20b) which projects radially outward from the hood-like housing wall (16).
15. Charge -air cooler according to one of Claims 11 to 14,
characterized in that
the two circumferential walls (11, 15) rest on each other with their mutually facing front sides (14, 18).
16. Fresh-air system having a charge-air cooler (1) according to one of the preceding claims.
PCT/IN2017/050225 2017-06-05 2017-06-05 Charge-air cooler for a fresh-air system of an internal combustion engine WO2018225078A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/IN2017/050225 WO2018225078A1 (en) 2017-06-05 2017-06-05 Charge-air cooler for a fresh-air system of an internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IN2017/050225 WO2018225078A1 (en) 2017-06-05 2017-06-05 Charge-air cooler for a fresh-air system of an internal combustion engine

Publications (1)

Publication Number Publication Date
WO2018225078A1 true WO2018225078A1 (en) 2018-12-13

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Link
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3531353A1 (en) * 1985-09-03 1987-03-12 Audi Ag Charge air cooler for supercharged internal combustion engine
JPH11280479A (en) * 1998-03-27 1999-10-12 Calsonic Corp Intercooler
DE19818873A1 (en) * 1998-04-28 1999-11-11 Man B & W Diesel Ag Silencer for large high-power diesel internal combustion engine
DE202005011669U1 (en) 2005-07-26 2005-09-29 Daimlerchrysler Ag Bypass resonator for induction passage of internal combustion engine has element consisting of porous material installed inside connection between chamber of resonator and induction pipe
FR2921123A1 (en) * 2007-09-17 2009-03-20 Mark Iv Systemes Moteurs Soc P Supply gas cooling circuit for overheating turbo-compressor of motor vehicle, has complementary cooling unit arranged between exit of turbo-compressor and main heat exchanger and downstream of main heat exchanger and for cooling supply gas

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3531353A1 (en) * 1985-09-03 1987-03-12 Audi Ag Charge air cooler for supercharged internal combustion engine
JPH11280479A (en) * 1998-03-27 1999-10-12 Calsonic Corp Intercooler
DE19818873A1 (en) * 1998-04-28 1999-11-11 Man B & W Diesel Ag Silencer for large high-power diesel internal combustion engine
DE202005011669U1 (en) 2005-07-26 2005-09-29 Daimlerchrysler Ag Bypass resonator for induction passage of internal combustion engine has element consisting of porous material installed inside connection between chamber of resonator and induction pipe
FR2921123A1 (en) * 2007-09-17 2009-03-20 Mark Iv Systemes Moteurs Soc P Supply gas cooling circuit for overheating turbo-compressor of motor vehicle, has complementary cooling unit arranged between exit of turbo-compressor and main heat exchanger and downstream of main heat exchanger and for cooling supply gas

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