Air inlet structure, EGR cooler, EGR and vehicle

Abstract

The invention belongs to the technical field of vehicle exhaust gas circulation, and discloses an air inlet structure, an EGR cooler, an EGR and a vehicle. The air inlet structure comprises an air inlet shell, an air flow channel is formed in the air inlet shell, and the air flow channel comprises an air inlet pipe section and an air outlet pipe section which are communicated with each other at an angle. The size and the shape of an air outlet section outlet of the air outlet pipe section are the same as the size and the shape of the cross section of the air outlet pipe section, the size of an air outlet section inlet of the air outlet pipe section is smaller than the size of the cross section of the air outlet pipe section, and the projection of the air outlet section inlet on the plane where the air outlet section outlet is located falls within the range of the air outlet section outlet. And one side of the outlet of the air outlet section in the height direction is covered. The air inlet structure can improve the uniformity of waste gas entering the EGR cooler and improve the cooling effect and efficiency of the waste gas.

Description

Technical Field

[0001] The invention relates to the technical field of vehicle exhaust gas circulation, and in particular to an intake structure, an EGR cooler, an EGR and a vehicle. Background Art

[0002] EGR (Exhaust Gas Recirculation) is mainly used to reduce nitrogen oxides in automobile exhaust emissions. It reintroduces part of the exhaust gas discharged by the engine into the intake manifold, tumbles with fresh air before entering the combustion chamber, thereby reducing the combustion temperature and reducing the generation of nitrogen oxides. The EGR cooler is an important component of EGR. In order to improve efficiency and ensure engine performance, an EGR cooler is usually used to cool the exhaust gas reintroduced into the intake manifold. The EGR cooler can reduce the temperature of the exhaust gas through a heat exchange process.

[0003] In order to prevent the interference between the two pulse energies when the two exhaust gases of the engine enter the EGR cooler and affect the subsequent cooling effect, a split-flow intake structure is used in the prior art to introduce the two exhaust gases into the EGR cooler separately.

[0004] The above-mentioned prior art only considers avoiding the impact of the collision interference between the two exhaust gases of the engine on the cooling effect, but does not consider the impact of the intake uniformity on the cooling effect.

[0005] Therefore, there is an urgent need for an intake structure, an EGR cooler, an EGR and a vehicle to solve the above problems. Summary of the invention

[0006] According to one aspect of the present invention, an object is to provide an air intake structure, which can improve the uniformity of exhaust gas entering the EGR cooler and improve the cooling effect and efficiency of the exhaust gas.

[0007] To achieve this object, the present invention adopts the following technical solutions:

[0008] Air intake structure, including:

[0009] An air inlet shell, wherein an air flow channel is formed inside the air inlet shell, and the air flow channel includes an air inlet pipe section and an air outlet pipe section connected to each other at an angle; the size and shape of the air outlet section outlet of the air outlet pipe section are the same as the size and shape of the cross-section of the air outlet pipe section, the size of the air outlet section inlet of the air outlet pipe section is smaller than the size of the cross-section of the air outlet pipe section, and the projection of the air outlet section inlet on the plane where the air outlet section outlet is located falls within the range of the air outlet section outlet and covers one side of the air outlet section outlet in the height direction.

[0010] As a preferred solution of the air intake structure provided by the present invention, the air flow channel further includes a transition pipe section, and the transition pipe section is connected between the air intake pipe section and the air outlet pipe section;

[0011] The lower side wall of the transition pipe section is connected to the lower edge of the inlet of the gas outlet section, and is recessed toward the upper side wall of the transition pipe section to form a first arc-shaped portion;

[0012] The upper side wall of the transition pipe section is connected to the upper edge of the inlet of the air outlet section, and is recessed toward the lower side wall of the transition pipe section to form a second arc-shaped portion.

[0013] As a preferred solution of the air intake structure provided by the present invention, the radius R2 of the second arc-shaped portion is 3 to 6 times the radius R1 of the first arc-shaped portion.

[0014] As a preferred solution of the air intake structure provided by the present invention, the upper edge of the inlet of the air outlet section is flush with the upper side wall of the air outlet pipe section, in the height direction of the air outlet pipe section, the distance between the lower edge of the inlet of the air outlet section and the lower side wall of the air outlet pipe section is L2, the height dimension of the air outlet pipe section is L1, and L2\L1 is 0.5~0.8.

[0015] As a preferred solution of the air intake structure provided by the present invention, the air intake structure further comprises a partition plate, the partition plate is arranged in the air intake housing, and two air flow channels arranged side by side are formed on both sides of the partition plate;

[0016] The arrangement direction of the air inlet section inlets of the two air inlet pipe sections is the same as the arrangement direction of the air outlet section outlets of the two air outlet pipe sections.

[0017] As a preferred solution of the air intake structure provided by the present invention, a reinforcement member is connected between the baffle and the lower side wall of the air outlet pipe section, the reinforcement member is located between the two air outlet pipe sections, the thickness B2 of the reinforcement member is greater than the thickness B3 of the baffle, B2\B3 is 1.5 to 3.5; and / or,

[0018] In the height direction of the air outlet pipe section, the height of the reinforcement is L4, the height dimension of the air outlet pipe section is L1, and L4\L1 is 0.05-0.25.

[0019] As a preferred solution of the air intake structure provided by the present invention, the angle between the air intake section inlet of the air intake pipe section and the air outlet section outlet is 85-95°.

[0020] According to another aspect of the present invention, an object is to provide an EGR cooler, which includes a cooling device and an intake structure as described in any of the above schemes, the intake section inlet of the intake pipe section is connected to the exhaust system of the engine, the outlet of the outlet section is connected to the air flow inlet of the cooling device, and the air flow outlet of the cooling device is connected to the intake manifold of the engine.

[0021] According to another aspect of the present invention, an object is to provide an EGR, which is connected to the exhaust system of the engine and includes an EGR cooler as described in the above solution, and the EGR cooler can cool the circulating exhaust gas in the EGR.

[0022] According to another aspect of the present invention, an object is to provide a vehicle, comprising an engine and an EGR as described in the above scheme, wherein the EGR can cool down part of the exhaust gas in the exhaust system of the engine and circulate it back to the intake manifold of the engine.

[0023] Beneficial effects of the present invention:

[0024] The air intake structure provided by the present invention includes an air intake shell, and an air flow channel is formed in the air intake shell. The air flow channel includes an air intake pipe section and an air outlet pipe section connected to each other at an angle. The size and shape of the outlet of the air outlet pipe section are the same as the size and shape of the cross section of the air outlet pipe section. The size of the air outlet inlet of the air outlet pipe section is smaller than the size of the cross section of the air outlet pipe section. The projection of the air outlet inlet on the plane where the air outlet section outlet is located falls within the range of the air outlet section outlet and covers one side of the air outlet section outlet in the height direction. By arranging the air intake pipe section and the air outlet pipe section at an angle, the length dimension of the air intake structure can be reduced, and the structure is compact to avoid excessive occupation of the layout space of the downstream cooling device, which is convenient for the layout of the cooling device and is conducive to improving the cooling effect. Through the above-mentioned structural improvements to the outlet section inlet and outlet of the outlet pipe section, an angled and gradually expanding flow channel structure is formed, that is, the flow field of the airflow flowing out of the inlet pipe section and flowing into the outlet pipe section is improved, which can make the circulating exhaust gas at the outlet of the outlet section form a strong tumbling flow, improve the uniformity of the airflow, ensure the uniformity of the circulating exhaust gas when entering the downstream cooling device, and then improve the cooling effect and efficiency of the circulating exhaust gas.

[0025] The EGR cooler provided by the present invention can improve the cooling effect and cooling efficiency of the exhaust gas by providing the above-mentioned air intake structure.

[0026] The EGR provided by the present invention can accelerate the cooling efficiency and effect of the circulating exhaust gas in the EGR by setting the above-mentioned EGR cooler, thereby improving the efficiency of exhaust gas circulation, ensuring the effect of reducing the combustion temperature of the circulating exhaust gas after entering the engine, and effectively reducing the generation of nitrogen oxides.

[0027] The vehicle provided by the present invention can realize the recycling of engine exhaust gas by arranging the above-mentioned EGR, and can effectively reduce the combustion temperature in the engine and reduce the generation of nitrogen oxides. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0029] Figure 1 is a schematic structural diagram of an EGR cooler provided by an embodiment of the present invention;

[0030] Figure 2 is a side view of an air intake structure provided by an embodiment of the present invention;

[0031] Figure 3 is a side view of an air flow channel of an air intake structure provided by an embodiment of the present invention;

[0032] Figure 4 is a structural schematic diagram of another air intake structure provided by an embodiment of the present invention;

[0033] Figure 5 It is a cross-sectional view of an air flow channel of another air intake structure provided by an embodiment of the present invention along the height direction of an air outlet pipe section.

[0034] In the figure:

[0035] 10. Cooling device; 11. Cooling shell; 12. Cooling pipe; 20. Air outlet structure; 30. Bolt;

[0036] 100, air inlet housing; 110, air inlet pipe section; 111, air inlet section inlet; 120, air outlet pipe section; 121, air outlet section outlet; 122, air outlet section inlet; 130, transition pipe section; 131, first arc-shaped portion; 132, second arc-shaped portion; 140, reinforcing ribs; 150, feeding channel;

[0037] 200, partition;

[0038] 300. Reinforcement. DETAILED DESCRIPTION

[0039] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0040] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0043] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or are the positions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0044] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", and "fix" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0046] In this embodiment, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in the present invention generally indicates that the associated objects before and after are in an "or" relationship.

[0047] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0048] The present embodiment provides an intake structure, an EGR cooler, an EGR, and a vehicle.

[0049] The vehicle provided in this embodiment includes an engine and an EGR provided in this embodiment. The EGR is connected to the exhaust system of the engine, and can cool down part of the exhaust gas in the exhaust system of the engine and circulate it back to the intake manifold of the engine. The EGR includes the EGR cooler provided in this embodiment, and the EGR cooler can cool the circulating exhaust gas in the EGR.

[0050] Figure 1 The schematic diagram of the structure of the EGR cooler provided by the embodiment of the present invention is shown. Figure 1 The EGR cooler provided in this embodiment includes a cooling device 10 and an intake structure provided in this embodiment, the inlet of the intake structure is connected to the exhaust system of the engine, the outlet of the intake structure is connected to the air flow inlet of the cooling device 10, and the air flow outlet of the cooling device 10 is connected to the intake manifold of the engine.

[0051] Specifically, the EGR cooler further includes an air outlet structure 20. The air outlet structure 20 and the air intake structure are detachably connected to the two ends of the cooling device 10 in the axial direction through connecting members such as bolts 30, and the air outlet structure 20 can be connected to the intake manifold of the engine to discharge the cooled exhaust gas out of the cooling device 10.

[0052] More specifically, the cooling device 10 includes a cooling housing 11 and a cooling pipe 12, wherein the cooling pipe 12 is disposed in the cooling housing 11, and the air intake structure is connected to the cooling pipe 12, and can guide the high-temperature exhaust gas to the cooling pipe 12. The inlet of the air outlet structure 20 is connected to the outlet of the cooling pipe 12, and can guide the cooled exhaust gas to the intake manifold of the engine.

[0053] Figure 2 A side view of an air intake structure provided by an embodiment of the present invention is shown, referring to Figure 2 The air intake structure provided in this embodiment includes an air intake housing 100. An air flow channel is formed in the air intake housing 100. The air flow channel includes an air intake pipe section 110 and an air outlet pipe section 120 connected to each other at an angle. By arranging the air intake pipe section 110 and the air outlet pipe section 120 at an angle, the length of the air intake structure can be reduced, and the structure is compact to avoid excessive occupation of the layout space of the downstream cooling device 10. In the same length of space, it is convenient to increase the layout length of the cooling pipe 12 in the cooling device 10, which is beneficial to improving the cooling effect.

[0054] Specifically, the size and shape of the outlet section outlet 121 of the outlet pipe section 120 are the same as the size and shape of the cross section of the outlet pipe section 120, the size of the outlet section inlet 122 of the outlet pipe section 120 is smaller than the size of the cross section of the outlet pipe section 120, and the projection of the outlet section inlet 122 on the plane where the outlet section outlet 121 is located falls within the range of the outlet section outlet 121 and covers one side of the outlet section outlet 121 in the height direction. Through the above-mentioned structural improvement of the outlet section inlet 122 and the outlet section outlet 121 of the outlet pipe section 120, an angled and gradually expanding airflow outflow channel structure is formed, that is, the flow field of the airflow flowing out of the inlet pipe section 110 and flowing into the outlet pipe section 120 is improved, and the circulating exhaust gas at the outlet section outlet 121 can form a strong tumble flow, improve the uniformity of the airflow, ensure the uniformity of the circulating exhaust gas when entering the downstream cooling device 10, and thus improve the cooling effect and efficiency of the circulating exhaust gas.

[0055] Specifically, the upper edge of the outlet section inlet 122 is flush with the upper side wall of the outlet pipe section 120. In the height direction of the outlet pipe section 120, the distance between the lower edge of the outlet section inlet 122 and the lower side wall of the outlet pipe section 120 is defined as L2, and the height dimension of the outlet pipe section 120 is defined as L1, and L2\L1 is 0.5-0.8. Through the above arrangement, the smoothness of the airflow flowing out of the air inlet pipe section 110 and into the outlet pipe section 120 can be ensured, and the problem of reduced fluidity of the airflow caused by the angled design of the air inlet pipe section 110 and the air outlet pipe section 120 in order to enhance the uniformity of the airflow is improved.

[0056] More specifically, the angle between the air inlet section inlet 111 of the air inlet pipe section 110 and the air outlet section outlet 121 is 85-95°. In this embodiment, the angle is preferably 90°.

[0057] Preferably, in this embodiment, the length B1 of the air outlet pipe section 120 is set to 10-20 mm, so as to reduce the length of the air outlet pipe section 120 as much as possible while ensuring the fluidity of the air flow and the formation of a strong swirl, thereby reducing the space occupied by the downstream cooling device 10 .

[0058] Figure 3 A side view of an air flow channel of an air intake structure provided by an embodiment of the present invention is shown. Figure 4 A schematic diagram showing another air intake structure provided by an embodiment of the present invention is shown. Figure 5 A cross-sectional view of an air flow channel of another air intake structure provided by an embodiment of the present invention along the height direction of the air outlet pipe section is shown. Figure 3-Figure 5 In this embodiment, the air intake structure further includes a baffle 200, which is arranged in the air intake housing 100 and partially extends out of the air outlet pipe section 120 at the outlet section outlet 121, forming two side-by-side air flow channels on both sides of the baffle 200. The arrangement direction of the air intake section inlet 111 of the two air intake pipe sections 110 is the same as the arrangement direction of the air outlet section outlet 121 of the two air outlet pipe sections 120. Through the above arrangement, the circulating exhaust gas flow can be divided into two streams at the air intake of the same cooling device 10 for separate cooling, thereby avoiding the interference of pulse energy between the two circulating exhaust gas streams. Moreover, the internal structures of the two air flow channels are the same and the directions are consistent, which can effectively solve the problem of uneven flow of the exhaust gas flow entering different cooling pipes 12 of the cooling device 10 from the air intake structure due to different structures or unreasonable settings of multiple air flow channels, resulting in excessive deviation of the flow of each cooling pipe 12, thereby reducing the overall cooling efficiency.

[0059] In this embodiment, by providing the partition 200 and arranging the air inlet pipe section 110 and the air outlet pipe section 120 at an angle, the flow deviation of the circulating exhaust gas entering each cooling pipe 12 can be maintained within ±15%.

[0060] Specifically, the airflow channel also includes a transition pipe section 130. The transition pipe section 130 is connected between the air inlet section 110 and the air outlet section 120. The lower side wall of the transition pipe section 130 is connected to the lower edge of the air outlet section inlet 122, and is recessed toward the upper side wall of the transition pipe section 130 to form a first arc-shaped portion 131. The upper side wall of the transition pipe section 130 is connected to the upper edge of the air outlet section inlet 122, and is recessed toward the lower side wall of the transition pipe section 130 to form a second arc-shaped portion 132. Through the above-mentioned first arc-shaped portion 131 and second arc-shaped portion 132, the airflow flowing out of the air inlet section 110 can be guided so that it can flow smoothly at the corner position between the air inlet section 110 and the air outlet section 120.

[0061] Preferably, the radius R2 of the second arc portion 132 is 3 to 6 times the radius R1 of the first arc portion 131. The above arrangement can ensure smoothness of airflow in the transition pipe section 130 and avoid stress concentration at the intersection of the transition pipe section 130 and the partition plate 200.

[0062] Continue to refer to Figure 4 and Figure 5 A reinforcing member 300 is connected between the baffle 200 and the lower side wall of the air outlet pipe section 120. The reinforcing member 300 is located between the two air outlet pipe sections 120. The thickness B2 of the reinforcing member 300 is greater than the thickness B3 of the baffle 200. Through the above arrangement, the structural strength of the baffle 200 can be enhanced at a position close to the outlet 121 of the air outlet section where thermal shock failure is prone to occur, thereby improving the reliability of the air intake structure.

[0063] Preferably, in order to prevent the reinforcement 300 from being too thick and affecting the smoothness of the circulating exhaust gas flow, the value range of B2\B3 is 1.5 to 3.5. In the height direction of the outlet pipe section 120, the height of the reinforcement 300 is L4, the height dimension of the outlet pipe section 120 is L1, and the value range of L4\L1 is 0.05 to 0.25.

[0064] Specifically, an arc-shaped transition needs to be provided between the reinforcement member 300 and the partition plate 200 to avoid stress concentration caused by structural mutation and adverse effects on the flow of airflow.

[0065] Preferably, in this embodiment, the air intake housing 100 is made of heat-resistant cast iron or cast steel to enhance structural rigidity. Figure 2As shown, a reinforcing rib 140 is provided at a position corresponding to the transition pipe section 130 on the outside of the air intake housing 100, and the reinforcing rib 140 can connect and reinforce the positions corresponding to the air intake pipe section 110 and the air outlet pipe section 120 on the outside of the air intake housing 100, thereby improving the structural reliability of the air intake housing 100. At the same time, in order to facilitate the flow of liquid during the casting process, a shrinkage-feeding channel 150 is provided between the upper edges of the air intake pipe section 110 and the air outlet pipe section 120 in the height direction.

[0066] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. Air intake structure, characterized in that: include: An air intake housing (100), wherein an air flow channel is formed in the air intake housing (100), wherein the air flow channel comprises an air intake pipe section (110) and an air outlet pipe section (120) which are connected to each other at an angle; the size and shape of the air outlet section outlet (121) of the air outlet pipe section (120) are the same as the size and shape of the cross section of the air outlet pipe section (120); the size of the air outlet section inlet (122) of the air outlet pipe section (120) is smaller than the size of the cross section of the air outlet pipe section (120); the projection of the air outlet section inlet (122) on the plane where the air outlet section outlet (121) is located falls within the range of the air outlet section outlet (121) and covers one side of the air outlet section outlet (121) in the height direction.

2. The air intake structure according to claim 1, characterized in that: The air flow channel further comprises a transition pipe section (130), wherein the transition pipe section (130) is connected between the air inlet pipe section (110) and the air outlet pipe section (120); The lower side wall of the transition pipe section (130) is connected to the lower edge of the outlet section inlet (122), and is recessed toward the upper side wall of the transition pipe section (130) to form a first arc-shaped portion (131); The upper side wall of the transition pipe section (130) is connected to the upper edge of the outlet section inlet (122), and is recessed toward the lower side wall of the transition pipe section (130) to form a second arc-shaped portion (132).

3. The air intake structure according to claim 2, characterized in that: The radius R2 of the second arc-shaped portion (132) is 3 to 6 times the radius R1 of the first arc-shaped portion (131).

4. The air intake structure according to claim 1, characterized in that: The upper edge of the air outlet section inlet (122) is flush with the upper side wall of the air outlet pipe section (120); in the height direction of the air outlet pipe section (120), the distance between the lower edge of the air outlet section inlet (122) and the lower side wall of the air outlet pipe section (120) is L2; ​​the height dimension of the air outlet pipe section (120) is L1, and L2\L1 is 0.5 to 0.

8.

5. The air intake structure according to claim 1, characterized in that: The air intake structure further comprises a partition plate (200), wherein the partition plate (200) is arranged in the air intake housing (100), and two air flow channels arranged side by side are formed on both sides of the partition plate (200); The arrangement direction of the air inlet section inlets (111) of the two air inlet pipe sections (110) is the same as the arrangement direction of the air outlet section outlets (121) of the two air outlet pipe sections (120).

6. The air intake structure according to claim 5, characterized in that: A reinforcing member (300) is connected between the partition (200) and the lower side wall of the air outlet pipe section (120), the reinforcing member (300) is located between the two air outlet pipe sections (120), the thickness B2 of the reinforcing member (300) is greater than the thickness B3 of the partition (200), and B2\B3 is 1.5 to 3.5; and / or, In the height direction of the air outlet pipe section (120), the height of the reinforcement member (300) is L4, the height dimension of the air outlet pipe section (120) is L1, and L4\L1 is 0.05-0.

25.

7. The air intake structure according to any one of claims 1 to 6, characterized in that: The angle between the air inlet section inlet (111) of the air inlet pipe section (110) and the air outlet section outlet (121) is 85-95°.

8. EGR cooler, characterized in that: The EGR cooler comprises a cooling device (10) and an intake structure as described in any one of claims 1 to 7, the intake section inlet (111) of the intake pipe section (110) is connected to the exhaust system of the engine, the outlet section outlet (121) is connected to the air flow inlet of the cooling device (10), and the air flow outlet of the cooling device (10) is connected to the intake manifold of the engine.

9. EGR, characterized in that An exhaust system connected to an engine comprises the EGR cooler as claimed in claim 8, wherein the EGR cooler is capable of cooling the circulating exhaust gas in the EGR.

10. A vehicle, characterized in that The vehicle includes an engine and the EGR as claimed in claim 9, wherein the EGR is capable of cooling a portion of the exhaust gas in the exhaust system of the engine and circulating it back to the intake manifold of the engine.

Images