Vehicle EGR cooler

Abstract

Vehicle exhaust gas recirculation (EGR) cooler, which includes the following: a housing (100) provided in a cylinder block (10) located outside a water jacket (11) of an internal combustion engine mounted in a vehicle, and which includes a cooling fluid inlet (110) and a cooling fluid outlet (120); a single or multiple gas pipes (200, 250, 260) arranged within the housing (100) and configuring an exhaust gas flow path; a pipe plate (300) containing pipe entry holes (310) into which opposite ends of the gas pipes (200, 250, 260) are inserted and attached; and a gas cover (400) coupled to the housing (100) on an outside of the tube plate (300) and comprising an exhaust inlet (410) connected to one end of the gas tube (200) and an exhaust outlet (420) connected to the other end of the gas tube (200), wherein the cooling fluid outlet (120) is provided on the gas cover (400) arranged outside the cylinder block (10) and the cooling fluid outlet (120) is formed in the vicinity of the exhaust gas outlet (420).

Description

[Technical field]

[0001] The present invention relates to a vehicle exhaust gas recirculation cooler (vehicle EGR cooler) for cooling a recirculated exhaust gas of a vehicle engine and in particular to a vehicle EGR cooler which is inserted into an engine block in which an outlet for a coolant is provided outside the engine block, which thus facilitates an adjustment of the diameter of the outlet and a change in its design. [State of the art]

[0002] Exhaust fumes from motor vehicles generally contain a large amount of harmful substances such as carbon monoxide, nitrogen oxides, hydrocarbons, and the like. In particular, the amount of harmful substances emitted, such as nitrogen oxides, increases as the temperature of an engine rises.

[0003] Currently, emissions regulations are being tightened in every country. To comply with these stricter regulations, vehicles are equipped with various devices to reduce harmful substances such as nitrogen oxides in their exhaust.

[0004] In particular, the components of the combustion fuel in vehicles equipped with a diesel engine differ from those in vehicles equipped with a gasoline engine, so that vehicles equipped with a diesel engine are fitted with a device such as a diesel particulate filter (DPF) or exhaust gas recirculation (EGR) to reduce harmful exhaust gases such as nitrogen oxides in order to comply with emissions regulations.

[0005] In general, the DPF collects particulate matter (PM) contained in exhaust gases and injects fuel into an exhaust pipe at a front end of the filter to force the particles to burn, thereby reducing escaping gas and regenerating the filter.

[0006] The EGR system is used to draw in a portion of a vehicle's exhaust gas along with a mixer in order to lower the temperature of a combustion chamber and reduce the outflow of harmful substances such as nitrogen oxides and sulfur oxides.

[0007] Furthermore, due to stricter regulations regarding atmospheric pollution, EGR coolers are currently being used worldwide to reduce the temperature of the EGR gas. The exhaust gas flowing into the EGR cooler is cooled by a coolant (cooling fluid) that flows out of the engine.

[0008] Related technology is contained in the Korean patent KR 10 0 748 756 B1 (title: EGR cooler of EGR system for vehicle, registration date: August 6, 2007).

[0009] The EGR cooler of the prior art comprises a cooling body with a coolant inlet line and a coolant outlet line at its opposite ends and with several gas pipes arranged parallel in a longitudinal direction within the cooling body, wherein a line valve is provided on one side of the cooling body.

[0010] Thus, an exhaust gas at a high temperature can be cooled by a recirculation system in which a coolant supplied via the coolant inlet line exchanges heat with an exhaust gas flowing within the gas lines in the interior of the cooling sink, with the coolant that has exchanged heat flowing out through the coolant outlet line.

[0011] In the case of an engine block inlet type EGR cooler, a cooling element is inserted into an engine block to receive a coolant flowing within the engine block to cool the exhaust gas and to allow the coolant to flow back into the engine block. The engine block inlet type EGR cooler with the configuration described above includes both a coolant inlet line and a coolant outlet line located within the engine block, which in this case creates the following problem.

[0012] Firstly, because of the coolant inlet and outlet lines, it is not easy to modify the design of a power engine block assembly.

[0013] Secondly, if a power engine block arrangement is changed, the design of the coolant inlet line and the coolant outlet line must be modified, which unnecessarily increases costs.

[0014] Thirdly, the coolant flow is limited and the heat exchange efficiency deteriorates due to the coolant pressure drop, as the shapes of the coolant inlet and outlet pipes are limited and not easily changed.

[0015] Fourthly, engine performance may be reduced due to deteriorated exhaust gas cooling efficiency if a coolant pressure drop occurs and if the heat exchange efficiency deteriorates as mentioned above.

[0016] KR 10 2017 0 011 151 A discloses a vehicle exhaust gas recirculation cooler with a housing, a gas pipe, a pipe plate and a gas cover according to claim 1. However, KR 10 2017 0 011 151 A does not disclose that the cooling fluid outlet is provided on the gas cover arranged outside the cylinder block and that the cooling fluid outlet is formed in the vicinity of the exhaust gas outlet.

[0017] DE 101 19 484 A1 discloses a liquid-cooled internal combustion engine with an exhaust gas recirculation system with an EGR heat exchanger (exhaust gas recirculation heat exchanger) having an exhaust gas inlet opening and an exhaust gas outlet opening, a coolant inlet opening and a coolant outlet opening, wherein the exhaust gas inlet opening, the exhaust gas outlet opening, the coolant inlet opening and the coolant outlet opening are arranged in one mounting plane. (Revelation) (Technical Problem)

[0018] One object of the present invention is to create a vehicle EGR cooler in which a coolant outlet line of a coolant body is provided on an outside of an engine block through a plate over which an exhaust gas flows in and out, thus facilitating the adjustment of a diameter of a coolant outlet and a change in its design. (Technical solution)

[0019] According to the invention, a vehicle exhaust gas recirculation (EGR) cooler comprises: a housing 100 provided in a cylinder block 10 located outside a water jacket 11 of an internal combustion engine mounted in a vehicle, and comprising a cooling fluid inlet 110 and a cooling fluid outlet 120; one or more gas pipes 200, 250, 260 arranged within the housing 100 and configuring an exhaust gas flow path; a pipe plate 300 comprising pipe entry holes 310 into which opposite ends of the gas pipes 200, 250, 260 are inserted and attached;and a gas cover 400, which is coupled to the housing 100 on an outside of the tube plate 300 and which has an exhaust inlet 10 connected to one end of the gas tube 200 and an exhaust outlet 420 connected to the other end of the gas tube 200, wherein the cooling fluid outlet 120 is provided on the gas cover 400 arranged outside the cylinder block 10 and the cooling fluid outlet 120 is formed in the vicinity of the exhaust outlet 420.

[0020] The coolant inlet 110 can be located adjacent to the cylinder block 10 and the coolant outlet 120 can be located outside the cylinder block 10.

[0021] Furthermore, the cooling fluid outlet 120 can be provided outside the cylinder block 10 through the tube plate 300 and through the gas cover 400.

[0022] Furthermore, the cooling fluid outlet 120 can include: a first outlet hole 121 provided at the tube plate 300; a second outlet 122 corresponding to the first outlet hole 121 provided at the gas cover 400; and an outflow line 125 connected at one end to the second outlet hole 122.

[0023] Furthermore, the first and second outlet holes 121 and 122 can be located near one of the pipe entry holes 310.

[0024] The first and second outlet holes 121 and 122 can be located near the exhaust outlet 420.

[0025] The gas pipe 250 can contain several rows 251, 252, 253, 254, which are arranged in a width direction of the pipe plate and spaced apart from each other, and wherein the pipe of each row 251, 252, 253, 254 has several stages.

[0026] Furthermore, the gas pipe 250 can be configured such that the number of stages of the pipes 251, 254 in at least one row arranged on an outermost side is less than the number of stages of the pipes 252, 253 in an adjacent row.

[0027] Furthermore, the gas pipe 260 can be configured in such a way that several rows 261, 262, 263 are arranged and spaced apart from each other in a lateral direction of the pipe plate 300 and that they are arranged diagonally in the lateral direction of the pipe plate 300.

[0028] Furthermore, the vehicle EGR cooler 1 may also include: a sealing element 600, which is provided between the tube plate 300 and the gas cover 400.

[0029] Furthermore, the sealing element 600 can be provided between the pipe plate 300, in which the first and second outlet holes 121 and 122 and the pipe entry holes 310 are provided, and the gas cover 400.

[0030] In the vehicle EGR cooler 1, the pipe plate 300, the sealing element 600 and the gas cover 400 can be coupled by a screw.

[0031] Furthermore, in the vehicle EGR cooler 1, the pipe plate 300 and the gas cover 400 can be coupled by brazing.

[0032] Furthermore, the housing 100 can be arranged in contact with the outer wall of the cylinder block 10 or be provided as a single unit with the cylinder block 10.

[0033] The gas tube 200 can include: a flat section 210 extending horizontally in a longitudinal direction of the housing 100; a first curved section 220 bent outwards from one end of the flat section 210; and a second curved section 230 bent outwards from the other end of the flat section 210, wherein the first and second curved sections 230 are bent and rounded in such a way that they have a predetermined curvature R at opposite ends of the flat section 210.

[0034] Furthermore, the tube plate 300 can contain a cooling fluid guide section 320 in which its inner surface protrudes at a point corresponding to the flat section 210 in the direction of the flat section 210. (Beneficial effects)

[0035] According to the vehicle EGR cooler of the embodiment of the present invention configured as described above, it is possible to easily adjust the diameter of the coolant outlet line through which coolant flows out, or to easily adjust its design, so that the coolant outlet line can be easily replaced when an engine block assembly design is changed.

[0036] Furthermore, an unnecessary increase in costs can be avoided, since the design of the coolant inlet line and the coolant outlet line does not need to be changed when a power engine block arrangement is modified.

[0037] Since the shape of the coolant outlet pipe is slightly modified, the outlet pipe can also be designed to be optimized for the coolant flow, so that a coolant can flow easily and the heat exchange efficiency can be improved.

[0038] Since the heat exchange efficiency is improved, the exhaust gas cooling efficiency is also improved, and the engine performance may be improved. (Description of the drawings) Fig. Figure 1 is a front view showing a condition in which an EGR cooler according to the present invention is mounted on the outside of an engine cylinder. Fig. Figure 2 is a perspective exploded view of an EGR cooler according to the present invention. Fig. Figure 3 is a front view showing a state in which a housing is removed from a vehicle EGR cooler according to the present invention. Fig. Figure 4 is a perspective view of a gas pipe arrangement of a general EGR cooler and a top view of a pipe plate to which a gas pipe is coupled. Fig. Figure 5 is a perspective view of a gas pipe arrangement and a top view of a pipe plate with which a gas pipe is coupled, according to a first embodiment of the present invention. Fig. Figure 6 is a perspective view of a gas pipe arrangement and a top view of a pipe plate with which a gas pipe is coupled, according to a second embodiment of the present invention. Fig. Figure 7 is a perspective view of a gas pipe arrangement and a top view of a pipe plate with which a gas pipe is coupled, according to a third embodiment of the present invention. Fig. Figure 8 is an enlarged perspective partial exploded view of an EGR cooler according to the present invention. Fig. Figure 9 is a perspective view of one side of a gas cover to which a housing is coupled, according to an embodiment of the present invention. - Description of reference symbols - 1 EGR cooler 100 cases 120 Coolant outlet 122 second outlet hole 200 gas pipe 110 Coolant inlet 121 first outlet hole 125 Outlet line 300 pipe plate 400 Gas Cover 420 Exhaust outlet 500 seals 600 sealing element 410 Exhaust inlet (Best execution method)

[0039] Fig. Figure 1 is a front view of a vehicle EGR cooler 1 according to an embodiment of the present invention and Fig. Figure 2 is a perspective exploded view of the vehicle EGR cooler 1 according to an embodiment of the present invention. Fig. Figure 3 is a front view showing a state in which a housing 100 is removed from the vehicle EGR cooler 1, according to an embodiment of the present invention.

[0040] As in Fig. 1 and Fig. As shown in Figure 2, the vehicle EGR cooler 1 according to the present invention comprises a housing 100, gas pipes 200, a pipe plate 300 and a gas cover 400.

[0041] The housing 100 contains a cooling fluid inlet 110 and a cooling fluid outlet 120, and includes a space for receiving a cooling fluid flowing in through the cooling fluid inlet 110. The cooling fluid used here is generally a coolant, although it can be replaced by any other cooling fluid.

[0042] As in Fig. As shown in Figure 1, the housing 100 corresponds to an outer wall surface of a cylinder block 10 located outside a water jacket 11 of an internal combustion engine mounted in a vehicle, and is in contact with the outer wall surface of the cylinder block 10.

[0043] In another embodiment, the housing 100 can be provided as a single unit with an engine block. In this case, the manufacturing time and manufacturing costs of the housing 100 of the EGR cooler 1 can be reduced due to a reduction in the number of assembly processes, and the space required for the installation of the EGR cooler 1 in the engine compartment of the vehicle can be minimized.

[0044] The coolant inlet 110 can be located adjacent to the cylinder block 10, receiving coolant flowing within the cylinder block 10 and supplying the received coolant to the interior of the housing 100. The coolant outlet 120 can be located on the outside of the cylinder block 10, i.e., adjacent to the tube plate 300 and the gas cover 400, to facilitate adjustment of the coolant outlet diameter and modification of its design. A specific configuration of the coolant outlet 120 is described with reference to the accompanying drawings. In another embodiment, the coolant inlet 110 can be formed integrally with the cylinder block 10.

[0045] The gas pipes 200 are arranged in several stages and in several rows, spaced apart vertically to form an exhaust gas flow path within the housing 100. This means that exhaust gas flows through the multiple gas pipes 200 and exchanges heat with a cooling fluid located inside the housing, thus cooling the exhaust gas flowing inside.

[0046] As in Fig. 1, Fig. 2 to Fig. Figure 3 shows that the gas pipe 200 of the vehicle EGR cooler 1 according to an embodiment of the present invention comprises a first curved section 220, a second curved section 230 and a flat section 210.

[0047] The flat section 210 runs horizontally in a longitudinal direction of the housing 100. The first curved section 220 is bent at one end of the flat section 210 and the second curved section 230 is bent at the other end of the flat section 210.

[0048] The second curved section 230 is opposite the first curved section 220 and has the same length as the first curved section 220. This means that the gas pipe 200 can have a "C" shape overall.

[0049] In the gas pipe 200, the first curved section 220 and the second curved section 230 can be bent in such a way that they are rounded at the opposite ends of the flat section 210 to have a predetermined curvature R.

[0050] Meanwhile, the pipe plate 300, which allows opposite ends of the gas pipes 200 to be inserted into it, contains pipe entry holes 310 corresponding to the number of multiple gas pipes 200.

[0051] In particular, the tube plate 300 includes a cooling fluid guide section 320, the inner surface of which protrudes towards the flat section 210 of the gas tube 200 at a point corresponding to the flat section 210, thus improving the flowability of the cooling fluid flowing into the housing 100.

[0052] In other words, without the cooling fluid guide section 320, some of the cooling fluid can flow within the housing 100 to a space between a tube located under the gas tubes 200 at the outermost section adjacent to the tube plate 300 and an inner surface of the tube plate 300, and immediately flow out to the cooling fluid outlet 120 without exchanging heat with the gas tube 200.

[0053] To prevent this, the cooling fluid guide section 320 is provided between the gas tubes 200 and the tube plate 300, so that most of the cooling fluid flowing in through the cooling fluid inlet 110 flows along a path in which the gas tubes 200 are located and subsequently flows out to the cooling fluid outlet 120, thus improving the flowability of the cooling fluid.

[0054] Furthermore, the vehicle EGR cooler 1 according to the present invention includes a gas cover 400, which is coupled to the housing 100 from an outside of the tube plate 300 and which has an exhaust gas inlet 410, which is provided on one side of it in a longitudinal direction, and an exhaust gas outlet 420, which is provided on the other side of it.

[0055] The exhaust gas inlet 410 and the exhaust gas outlet 420 can vary in terms of angle according to application models, wherein the exhaust gas inlet 410 can be arranged longitudinally on the same side as the cooling fluid inlet 110 of the housing 100 or longitudinally on the opposite side.

[0056] Fig. Figure 4 is a perspective view showing an arrangement of a general gas pipe 20 and a pipe plate 30 to which the gas pipe 20 is coupled. As shown, the general gas pipe 20 is arranged in a three-row configuration, containing pipes 21, 22, and 23 of the first to third rows, wherein pipes 21, 22, and 23 of the first to third rows each contain four pipes, i.e., a (1-1)th pipe to a (1-4)th pipe 21-1, 21-2, 21-3, and 21-4, arranged in several stages to form rows.

[0057] The arrangement of the gas pipes 20 can be more easily understood in light of the arrangement of the pipe entry holes 31 in the pipe plate 30 to which the gas pipes 20 are coupled. The pipe entry holes 31 are provided at opposite ends of the pipe plate 30 such that one end and the other end of the gas pipes 20 are inserted therein, the positions of the pipe entry holes 31 being determined depending on the arrangement of the gas pipes 20.

[0058] The arrangement of the gas pipes 200, 250 and 260 according to various embodiments of the present invention is described in detail below with reference to the accompanying drawings.

[0059] Fig. Figure 5 is a perspective view showing an arrangement of a gas pipe 200 and a pipe plate 300, to which the gas pipe 200 is coupled. Fig. Figure 6 is a perspective view showing an arrangement of a gas pipe 250 and the pipe plate 350 to which the gas pipe 250 is coupled and Fig. Figure 7 is a perspective view showing an arrangement of a gas pipe 260 and a pipe plate 360 ​​with which the gas pipe 260 is coupled. Design 1 (thermally expandable type)

[0060] Based on Fig. 5. According to the first embodiment of the present invention, the gas pipe 200 has a further row compared to the general gas pipe 200 described above. That is, the gas pipe 200 contains pipes 201, 202, 203 and 204 of a first to fourth row, wherein the pipes 201, 202, 203 and 204 of the first to fourth row each contain, in four stages forming a row, a (1-1)th to a (1-4)th pipe 201-1, 201-2, 201-3 and 201-4.

[0061] The arrangement of the gas pipes 200 can be readily understood in light of the arrangement of the pipe entry holes 310 in the pipe plate 300, to which the gas pipes 200 are coupled. The pipe entry holes 310 are provided at opposite ends of the pipe plate 300 such that one end and the other end of the gas pipe 200 are inserted therein, the positions of the pipe entry holes 310 being determined depending on the arrangement of the gas pipes 200. The pipe entry holes 310 of this embodiment have a 4 × 4 shape.

[0062] The arrangement of the gas pipes 200 as described above allows a larger quantity of exchange gas to exchange heat with the cooling fluid, which improves the cooling performance of the exhaust gas. Design 2 (flow amplification type 1)

[0063] Based on Fig. 6 The gas pipe 250 according to the second embodiment of the present invention includes gas pipes 200 in which the gas pipe 200 in the outermost row is removed compared to the gas pipes 200 of the first embodiment. That is, the gas pipes 250 are arranged in four rows, containing pipes 251, 252, 253, and 254 of the first to fourth rows. The pipes 251, 252, 253, and 254 of the first to fourth rows are each configured such that four stages form a row, and the pipe 251 of the first row is configured such that three stages, such as the (1-1)th to (1-3)th pipes 251-1, 251-2, and 251-3, form a row.

[0064] The arrangement of the gas pipes 250 can be readily understood in light of the arrangement of the pipe entry holes 351 in the pipe plate 350, to which the gas pipes 250 are coupled. The pipe entry holes 351 are provided at opposite ends of the pipe plate 300 such that one end and the other end of the gas pipes 200 are inserted therein, the positions of the pipe entry holes 351 being determined depending on the arrangement of the gas pipes 250. The pipe entry holes 351 of this embodiment have a 4 × 3 and 3 × 1 shape.

[0065] The arrangement of the gas tubes 250 as described above can prevent the flow performance of the cooling fluid flowing within the housing 100 from deteriorating as the number of tube rows increases. - Design 3 (flow improvement type 2)

[0066] Based on Fig. According to the third embodiment of the present invention, the gas pipe 260 contains rows arranged diagonally relative to the general gas pipe 20. That is, the gas pipes 260 are arranged in three rows, comprising pipes 261, 262, and 263 of the first to third rows. The pipes 261, 262, and 263 of the first to third rows are configured such that four of them form a row, with the pipes 261, 262, and 263 of the first to third rows being arranged diagonally in a lateral direction of the pipe plate 300.

[0067] The arrangement of the gas pipes 260 can be readily understood in view of the arrangement of the pipe entry holes 361 of the pipe plate 360, to which the gas pipes 260 are coupled. The pipe entry holes 361 are provided at opposite ends of the pipe plate 360 ​​such that one end and the other end of the gas pipes 260 are inserted therein, the positions of the pipe entry holes 361 being determined depending on an arrangement of the gas pipes 260.

[0068] The arrangement of the gas pipes 260 as described above can prevent the flow performance of the cooling fluid flowing between the closely spaced pipes from deteriorating.

[0069] Fig. Figure 8 is a perspective exploded view of a coolant outlet 120 according to an embodiment of the present invention and Fig. Figure 9 is a perspective view of one side of the gas cover 400, with which the housing 100 is coupled, according to an embodiment of the present invention.

[0070] The cooling fluid outlet 120, which is a characteristic component of the present invention, is described in detail. As in Fig. 1, Fig. 2, Fig. 3, Fig. 4 to Fig. As shown in Figure 5, the cooling fluid outlet 120 contains a first outlet hole 121, a second outlet hole 122 and a second outflow line 125.

[0071] As described above, the cooling fluid outlet 120 can be exposed to the outside of the cylinder block 10 through the tube plate 300 and through the gas cover 400.

[0072] The first outlet hole 121 can be provided on the tube plate 300 and communicate with a space in which the coolant flows within the housing 100, and the second outlet hole 122 can be provided on the gas cover 400 at a location corresponding to the first outlet hole 121 and communicate with the space in which the coolant flows within the housing 100. In particular, the first and second outlet holes 121 and 122 can be provided near the exhaust outlet 420, which is located longitudinally on the opposite side of the gas cover 400, so that the coolant flowing in through the coolant inlet 110 can exchange sufficient heat with the gas tube 200 and subsequently flow out through the first and second outlet holes 121 and 122. The outflow line 125 is configured such that one end of it is connected to the second outlet hole 122 and the other end of it is exposed outside the gas cover 400.

[0073] Since the size of the first and second outlet holes 121 and 122 can be easily adjusted, and since the design of the outlet pipe 125 is not limited by the configuration described above, the diameter of the outlet and the design of the outflow line can be optimized for the flow of the coolant, allowing the coolant to flow freely, thus improving the heat exchange efficiency.

[0074] As in Fig. As shown in Figure 2, the vehicle EGR cooler 1 according to an embodiment of the present invention may also include a seal 500 and a sealing element 600.

[0075] The seal 500 is mainly installed between the housing 100 and the tube plate 300 to prevent the cooling fluid from leaking out of the housing 100 to the outside of the housing 100.

[0076] The seal 500 can have an essentially rectangular plate shape, can correspond to the shape of an outer circumferential surface of the housing 100 and can be coupled to the housing 100 by a screw.

[0077] The sealing element 600 is additionally provided between the tube plate 300 and the gas cover 400 to prevent exhaust gas flowing in through the exhaust gas inlet 410 and exhaust gas flowing out through the exhaust gas outlet 420 from escaping. Secondarily, the sealing element 600 also prevents coolant from escaping outside the housing 100 when coolant flows out of the housing 100 through the coolant outlet 120. Thus, the sealing element 600 can include a pair of exhaust gas flow chambers 610, located at an exhaust gas inlet and an exhaust gas outlet, respectively, and a coolant flow chamber 650 adjacent to a coolant outlet, as well as sealing sections that exclude the exhaust gas flow chamber 610 and the coolant flow chamber 650.

[0078] The sealing element 600 can correspond to a shape of an outer circumferential surface of the gas cover 400 and can be coupled between the pipe plate 300 and the gas cover 400 by a screw, similar to the seal.

[0079] The tube plate 300 and the gas cover 400 in the vehicle EGR cooler of the present invention can be coupled here without the sealing element 600 by brazing.

[0080] The present invention should not be understood as being limited to the embodiment mentioned above. The present invention can be applied by a person skilled in the art to various fields and modified in various ways without deviating from the scope of protection claimed in the claims. Thus, it is obvious to a person skilled in the art that these modifications and adaptations fall within the scope of protection of the present invention.

Claims

[1] Vehicle exhaust gas recirculation (EGR) cooler comprising the following: a housing (100) provided in a cylinder block (10) located outside a water jacket (11) of an internal combustion engine mounted in a vehicle, and which includes a cooling fluid inlet (110) and a cooling fluid outlet (120); a single or multiple gas pipes (200, 250, 260) arranged within the housing (100) and configuring an exhaust gas flow path; a pipe plate (300) containing pipe entry holes (310) into which opposite ends of the gas pipes (200, 250, 260) are inserted and attached; and a gas cover (400) coupled to the housing (100) on an outside of the tube plate (300) and comprising an exhaust inlet (410) connected to one end of the gas tube (200) and an exhaust outlet (420) connected to the other end of the gas tube (200), wherein the cooling fluid outlet (120) is provided on the gas cover (400) arranged outside the cylinder block (10) and the cooling fluid outlet (120) is formed in the vicinity of the exhaust gas outlet (420). [2] Vehicle EGR cooler according to claim 1, wherein the coolant inlet (110) is provided adjacent to the cylinder block (10) and the coolant outlet (120) is provided outside the cylinder block (10). [3] Vehicle EGR cooler according to claim 1, wherein the cooling fluid outlet (120) is provided outside the cylinder block (10) by the tube plate (300) and by the gas cover (400). [4] Vehicle EGR cooler according to claim 3, wherein the cooling fluid outlet (120) contains: a first outlet hole (121) provided at the pipe plate (300); a second outlet (122) which is provided at the gas cover (400) corresponding to the first outlet hole (121); and an outflow line (125) having one end connected to the second outlet hole (122). [5] Vehicle EGR cooler according to claim 4, wherein the first and second outlet holes (121, 122) are provided near one of the pipe entry holes (310). [6] Vehicle EGR cooler according to claim 4, wherein the first and second outlet holes (121, 122) are provided near the exhaust outlet (420). [7] Vehicle EGR cooler according to claim 1, wherein the gas pipe (250) contains several rows (251, 252, 253, 254) arranged in a width direction of the pipe plate and spaced apart from each other, and wherein the pipe of each row (251, 252, 253, 254) has several stages. [8] Vehicle EGR cooler according to claim 7, wherein the gas pipe (250) is configured such that the number of stages of the pipes (251, 254) in at least one row arranged on an outermost side is less than the number of stages of the pipes (252, 253) in an adjacent row. [9] Vehicle EGR cooler according to claim 1, wherein the gas pipe (260) is configured in such a way that several rows (261, 262, 263) are arranged and spaced apart from each other in a width direction of the tube plate (300) and are arranged diagonally in the width direction of the tube plate (300). [10] Vehicle EGR cooler according to claim 1, further comprising: a sealing element (600) that is provided between the pipe plate (300) and the gas cover (400). [11] Vehicle EGR cooler according to claim 10, wherein the sealing element (600) is provided between the tube plate (300) in which the first and second outlet holes (121) and (122) and the pipe entry holes (310) are provided, and the gas cover (400). [12] Vehicle EGR cooler according to claim 10, wherein the tube plate (300), the sealing element (600) and the gas cover (400) are coupled by a screw. [13] Vehicle EGR cooler according to claim 1, wherein the tube plate (300) and the gas cover (400) are coupled by brazing. [14] Vehicle EGR cooler according to claim 1, wherein the housing (100) is arranged in contact with the outer wall of the cylinder block (10) or is provided as one piece with the cylinder block (10). [15] Vehicle EGR cooler according to claim 1, wherein the gas pipe (200) contains: a flat section (210) that runs horizontally in a longitudinal direction of the housing (100); a first curved section (220) which is bent from one end of the flat section (210) outwards from the housing (100); and a second curved section 230, which is bent from the other end of the flat section (210) outwards from the housing (100), wherein the first and second curved section (230) are bent and rounded in such a way that they have a predetermined curvature (R) at opposite ends of the flat section (210). [16] Vehicle EGR cooler according to claim 15, wherein the tube plate (300) includes a cooling fluid guide section (320) in which an inner surface of the tube plate protrudes at a location corresponding to the flat section (210) in the direction of the flat section (210).

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