Intake structure, egr cooler, egr and vehicle

Abstract

The application belongs to the technical field of vehicle exhaust circulation, and discloses an air inlet structure, an EGR cooler, an EGR and a vehicle. The air inlet structure comprises an air inlet shell, and an airflow channel is formed in the air inlet shell. The airflow channel comprises an air inlet pipe section and an air outlet pipe section which are angularly communicated with each other. The size and shape of an air outlet section outlet of the air outlet pipe section are the same as the size and shape of a 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. A projection of the air outlet section inlet on a 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. The air inlet structure can improve the uniformity of exhaust gas entering the EGR cooler and improve the cooling effect and efficiency of the exhaust gas.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle exhaust gas circulation, in particular to an air intake structure, an EGR cooler, an EGR and a vehicle. BACKGROUND

[0002] EGR (Exhaust Gas Recirculation) is mainly used to reduce nitrogen oxides in automobile exhaust emissions. It re-introduces a part of the exhaust gas discharged by the engine into the intake manifold, mixes with fresh air and then enters the combustion chamber, thereby reducing the combustion temperature and reducing the generation of nitrogen oxides. An 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 re-introduced into the intake manifold. The EGR cooler can reduce the temperature of the exhaust gas through a heat exchange process.

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

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

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

[0006] According to one aspect of the present application, the purpose is to provide an air intake structure that 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 purpose, the present application adopts the following technical solutions:

[0008] The air intake structure comprises:

[0009] An air intake shell is formed inside the air intake shell, and the air flow channel comprises an air intake pipe section and an air outlet pipe section that are in angular communication with each other; 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; 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 scheme of the air intake structure provided by the application, the airflow channel further comprises a transition pipe section, which is communicated 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 air outlet section entrance and is recessed towards the upper side wall of the transition pipe section to form a first arc-shaped part;

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

[0013] As a preferred scheme of the air intake structure provided by the application, the radius R2 of the second arc-shaped part is 3-6 times the radius R1 of the first arc-shaped part.

[0014] As a preferred scheme of the air intake structure provided by the application, the upper edge of the air outlet section entrance is flush with the upper side wall of the air outlet pipe section, and in the height direction of the air outlet pipe section, the distance between the lower edge of the air outlet section entrance 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 scheme of the air intake structure provided by the application, the air intake structure further comprises a partition plate, which is arranged in the air intake shell and forms two airflow channels side by side on both sides of the partition plate.

[0016] The arrangement directions of the air intake section entrances of the two air intake pipe sections are the same as the arrangement directions of the air outlet section exits of the two air outlet pipe sections.

[0017] As a preferred scheme of the air intake structure provided by the application, a reinforcing member is connected between the partition plate and the lower side wall of the air outlet pipe section, the reinforcing member is located between the two air outlet pipe sections, the thickness B2 of the reinforcing member is greater than the thickness B3 of the partition plate, B2\B3 is 1.5-3.5; and / or,

[0018] In the height direction of the air outlet pipe section, the height of the reinforcing member 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 scheme of the air intake structure provided by the application, the included angle between the air intake section entrance of the air intake pipe section and the air outlet section exit is 85-95°.

[0020] According to still another aspect of the present application, there is provided an EGR cooler comprising a cooling device and the intake structure according to any one of the preceding aspects, wherein the intake section inlet of the intake pipe section is connected to an exhaust system of an engine, the exhaust section outlet is connected to an airflow inlet of the cooling device, and an airflow outlet of the cooling device is connected to an intake manifold of the engine.

[0021] According to still another aspect of the present application, there is provided an EGR connected to an exhaust system of an engine, comprising the EGR cooler according to the preceding aspect, wherein the EGR cooler is capable of cooling exhaust gas circulating in the EGR.

[0022] According to still another aspect of the present application, there is provided a vehicle comprising an engine and the EGR according to the preceding aspect, wherein the EGR is capable of cooling part of exhaust gas in an exhaust system of the engine and circulating back to an intake manifold of the engine.

[0023] Advantages of the present application:

[0024] The intake structure provided by the present application comprises an intake shell, and an airflow passage is formed in the intake shell, the airflow passage comprising an intake pipe section and an exhaust pipe section which are in angular communication with each other. The exhaust section outlet of the exhaust pipe section has the same size and shape as the cross section of the exhaust pipe section, and the size of the exhaust section inlet of the exhaust pipe section is smaller than the size of the cross section of the exhaust pipe section. The projection of the exhaust section inlet on the plane where the exhaust section outlet is located falls within the range of the exhaust section outlet and covers one side of the exhaust section outlet in the height direction. By angularly arranging the intake pipe section and the exhaust pipe section, the length of the intake structure can be reduced, and the structure is compact to avoid occupying too much space for the arrangement of the downstream cooling device, facilitating the arrangement of the cooling device and improving the cooling effect.

[0025] The EGR cooler provided by the present application can improve the cooling effect and efficiency of exhaust gas by arranging the intake structure.

[0026] The EGR provided by the present application can accelerate the cooling efficiency and effect of the circulating exhaust gas in the EGR by arranging the EGR cooler, thereby improving the efficiency of exhaust gas circulation, ensuring the reduction effect of the combustion temperature after the circulating exhaust gas enters the engine, and effectively reducing the generation of nitrogen oxides.

[0027] The vehicle provided by the application can realize the recycling of engine exhaust gas, effectively reduce the combustion temperature in the engine and reduce the generation of nitrogen oxides. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments of the present application will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art according to the contents of the embodiments of the present application and the drawings without any creative labor.

[0029] Figure 1 is a structural schematic view of the EGR cooler provided by the embodiments of the present application;

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

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

[0032] Figure 4 is a structural schematic view of another air intake structure provided by the embodiments of the present application;

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

[0034] In the drawings:

[0035] 10, cooling device; 11, cooling housing; 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 part; 132, second arc-shaped part; 140, reinforcing rib; 150, feeding channel;

[0037] 200, partition plate;

[0038] 300, reinforcing member. DETAILED DESCRIPTION

[0039] The technical solutions of the present application will be further described below in combination with the drawings and through specific embodiments.

[0040] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0042] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0043] In the description of the present application, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0044] In the description of the present application, it should also be noted that, unless otherwise specified and limited, the terms "set", "connected", "fixed" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, or electrically connected. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0045] In the present application, unless otherwise explicitly specified and limited, "on" or "under" of a first feature to a second feature can include that the first and second features are in direct contact, or can include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, "on", "above" and "over" of a first feature to a second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. "Under", "below" and "underneath" of a first feature to a second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower in horizontal height than the second feature.

[0046] In the present application, the term "and / or", only describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, in the present application, the character " / " generally represents that the front and rear associated objects are in an "or" relationship.

[0047] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

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

[0049] The vehicle provided by the present embodiment includes an engine and an EGR provided by the present embodiment. The EGR is connected to an exhaust system of the engine, and can cool and recycle part of exhaust gas in the exhaust system of the engine to an intake manifold of the engine. The EGR includes an EGR cooler provided by the present embodiment, which can cool the recycled exhaust gas in the EGR.

[0050] Figure 1 The structure of the EGR cooler provided by the present embodiment is shown in the schematic view. Referring to Figure 1 The EGR cooler provided by the present embodiment includes a cooling device 10 and an air intake structure provided by the present embodiment. The inlet of the air intake structure is communicated with the exhaust system of the engine, the outlet of the air intake structure is communicated with the airflow inlet of the cooling device 10, and the airflow outlet of the cooling device 10 is communicated with the intake manifold of the engine.

[0051] Specifically, the EGR cooler further comprises an air outlet structure 20. The air outlet structure 20 is detachably connected to the two ends of the cooling device 10 in the axial direction through the connecting members such as bolts 30, respectively, 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] Specifically, the cooling device 10 comprises a cooling shell 11 and a cooling pipe 12 arranged in the cooling shell 11, and the air inlet structure is connected to the cooling pipe 12 to guide the high-temperature exhaust gas into the cooling pipe 12. The inlet of the air outlet structure 20 is connected to the outlet of the cooling pipe 12 to guide the cooled exhaust gas to the intake manifold of the engine.

[0053] Figure 2 A side view of the air inlet structure provided by the embodiment of the present application is shown, and the air inlet structure provided by the embodiment of the present application comprises an air inlet shell 100. Figure 2 The air inlet shell 100 forms an air flow channel therein. The air flow channel comprises an air inlet pipe section 110 and an air outlet pipe section 120 which are connected to each other at an angle. By arranging the air inlet pipe section 110 and the air outlet pipe section 120 at an angle, the length of the air inlet structure can be reduced, and the structure is compact to avoid occupying too much space of the downstream cooling device 10, and in the same length of space, the arrangement length of the cooling pipe 12 in the cooling device 10 can be increased, which is beneficial to improve the cooling effect.

[0054] Specifically, 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, and 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. Through the above-mentioned improvement of the structure of the air outlet section inlet 122 and the air outlet section outlet 121 of the air outlet pipe section 120, the air flow outlet flow channel structure which is angled and gradually expanded is formed, that is, the flow field of the air flow flowing out of the air inlet pipe section 110 and flowing into the air outlet pipe section 120 is improved, which can form strong rolling flow of the circulating exhaust gas at the air outlet section outlet 121, improve the uniformity of the air flow, ensure the uniformity of the circulating exhaust gas entering the downstream cooling device 10, and further improve the cooling effect and efficiency of the circulating exhaust gas.

[0055] More specifically, the upper edge of the air outlet section inlet 122 is flush with the upper side wall of the air outlet pipe section 120, and 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 defined as L2 in the height direction of the air outlet pipe section 120, and the height dimension of the air outlet pipe section 120 is defined as L1, and L2 / L1 is 0.5-0.8. Through the above setting, the flow smoothness of the air flow flowing out of the air inlet pipe section 110 and flowing into the air outlet pipe section 120 can be ensured, and the problem of reduced flow of air flow caused by the angular design of the air inlet pipe section 110 and the air outlet pipe section 120 for the purpose of enhancing air flow uniformity 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 the present embodiment, the above angle is preferably 90°.

[0057] As a preference, in the present embodiment, the length B1 of the air outlet pipe section 120 is set to 10-20 mm. The length of the air outlet pipe section 120 can be reduced as much as possible on the basis of ensuring the flow of air and the formation of strong cyclone, and further reducing the space occupation of the downstream cooling device 10.

[0058] Figure 3 a side view of an air flow passage of an air inlet structure provided by an embodiment of the present application, Figure 4 a structural schematic view of another air inlet structure provided by an embodiment of the present application, Figure 5 a sectional view of an air flow passage of another air inlet structure provided by an embodiment of the present application along the height direction of an air outlet pipe section. Refer to Figures 3-5 In the present embodiment, the air inlet structure further comprises a partition plate 200, which is arranged in the air inlet shell 100 and partially protrudes out of the air outlet pipe section 120 at the air outlet section outlet 121, and two air flow passages 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. Through the above setting, the circulating exhaust air flow can be divided into two streams at the air flow inlet of the same cooling device 10 for separate cooling, avoiding the interference of the pulse energy between the two streams of circulating exhaust air. And the structures inside the two air flow passages are the same and consistent, which can effectively solve the problem of uneven flow of exhaust air flowing into different cooling pipes 12 of the cooling device 10 from the air inlet structure due to different structures or unreasonable arrangement of multiple air flow passages, and the problem of excessive flow deviation of each cooling pipe 12, which reduces the overall cooling efficiency.

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

[0060] Specifically, the airflow channel further includes a transition section 130. The transition section 130 connects the intake section 110 and the outlet section 120. The lower sidewall of the transition section 130 is connected to the lower edge of the outlet section inlet 122 and is recessed towards the upper sidewall to form a first arcuate portion 131. The upper sidewall of the transition section 130 is connected to the upper edge of the outlet section inlet 122 and is recessed towards the lower sidewall to form a second arcuate portion 132. Through the first arcuate portion 131 and the second arcuate portion 132, the airflow from the intake section 110 can be guided, ensuring smooth flow at the corner between the intake section 110 and the outlet section 120.

[0061] Preferably, the radius R2 of the second arcuate portion 132 is 3 to 6 times the radius R1 of the first arcuate portion 131. This arrangement ensures smooth airflow within the transition pipe section 130 while preventing stress concentration at the intersection of the transition pipe section 130 and the baffle 200.

[0062] Continue to refer to Figure 4 and Figure 5 A reinforcing member 300 is connected between the partition 200 and the lower sidewall of the exhaust pipe section 120. The reinforcing member 300 is located between the two exhaust pipe sections 120, and its thickness B2 is greater than that of the partition 200. This arrangement strengthens the structural strength of the partition 200 near the exhaust outlet 121, a location prone to thermal shock failure, thereby improving the reliability of the intake structure.

[0063] Preferably, to avoid the reinforcing member 300 being too thick and affecting the smooth flow of the circulating exhaust gas, the values ​​of B2 and B3 are in the range of 1.5 to 3.5. Furthermore, in the height direction of the exhaust pipe section 120, the height of the reinforcing member 300 is L4, and the height dimension of the exhaust pipe section 120 is L1, with the values ​​of L4 and L1 ranging from 0.05 to 0.25.

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

[0065] Preferably, in this embodiment, the intake housing 100 is made of heat-resistant cast iron or cast steel. To enhance structural rigidity, such as... Figure 2As shown, a reinforcing rib 140 is provided on the outer side of the air intake housing 100 corresponding to the transition pipe section 130. The reinforcing rib 140 can connect and reinforce the outer side of the air intake housing 100 at the positions corresponding to the air intake pipe section 110 and the air outlet pipe section 120, 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 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 implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. An air intake structure, characterized in that, include: An air intake housing (100) is provided, and an airflow channel is formed within the air intake housing (100). The airflow channel includes an air intake pipe section (110) and an air outlet pipe section (120) that are connected to each other at an angle. The size and shape of the air 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 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 inlet (122) on the plane where the air outlet (121) is located falls within the range of the air outlet (121) and covers one side of the air outlet (121) in the height direction. The airflow channel also includes a transition pipe section (130), which is connected between the air inlet pipe section (110) and the air outlet pipe section (120); The lower sidewall 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 sidewall of the transition pipe section (130) to form a first arc-shaped portion (131). The upper sidewall 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 sidewall of the transition pipe section (130) to form a second arc-shaped portion (132). 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 and L1 are 0.5~0.

8.

2. The intake structure according to claim 1, 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).

3. The intake structure according to claim 1, characterized in that, The air intake structure also includes a baffle (200), which is disposed inside the air intake housing (100) and forms two parallel airflow channels on both sides of the baffle (200); The arrangement direction of the air inlets (111) of the two air inlet pipe sections (110) is the same as the arrangement direction of the air outlets (121) of the two air outlet pipe sections (120).

4. The intake structure according to claim 3, characterized in that, A reinforcing member (300) is connected between the lower sidewall of the partition (200) and the vent pipe section (120). The reinforcing member (300) is located between the two vent 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 1.5~3.5; and / or, In the height direction of the air outlet pipe section (120), the height of the reinforcing member (300) is L4, and the height dimension of the air outlet pipe section (120) is L1, with L4 and L1 being 0.05~0.

25.

5. The intake structure according to any one of claims 1-4, characterized in that, The included angle between the air intake section inlet (111) and the air outlet section outlet (121) of the air intake section (110) is 85~95°.

6. An EGR cooler, characterized in that, The EGR cooler includes a cooling device (10) and an intake structure as described in any one of claims 1-5, wherein the intake section inlet (111) of the intake pipe section (110) is connected to the exhaust system of the engine, the exhaust section outlet (121) is connected to the airflow inlet of the cooling device (10), and the airflow outlet of the cooling device (10) is connected to the intake manifold of the engine.

7. EGR, characterized in that, An exhaust system connected to an engine includes an EGR cooler as described in claim 6, the EGR cooler being capable of cooling the circulating exhaust gas in the EGR.

8. A vehicle, characterized in that, The vehicle includes an engine and an EGR as described in claim 7, the EGR being capable of cooling a portion of the exhaust gases from the engine's exhaust system and recirculating them back into the engine's intake manifold.

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