Eddy current diode, waste gas circulation system and automobile
By designing the vortex cavity structure and protrusion features of the eddy current diode, the problem of improving the EGR rate in the high-pressure EGR system was solved, achieving engine knock control and thermal efficiency improvement, and avoiding the reliability problem of the one-way valve.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- FAW JIEFANG AUTOMOTIVE CO
- Filing Date
- 2026-03-30
- Publication Date
- 2026-05-05
AI Technical Summary
In existing technologies, high-pressure EGR systems have difficulty improving EGR rates in the low-to-medium speed, high-load range, which affects engine knock control and thermal efficiency improvement. Furthermore, the one-way valve plate is prone to breakage and reliability risks during long-term operation.
Eddy current diodes are used to replace one-way valves. Eddy current diodes include vortex disks, axial tubes and tangential tubes, and are designed as vortex cavity structures to increase the flow path length and turbulence loss. By protruding and destroying the free vortex core, the contact area between the fluid and the solid wall is increased and turbulence is induced, thereby improving the EGR driving capability.
It effectively improves the EGR rate, reduces forward flow resistance, increases mechanical energy loss in reverse flow, solves the reliability problem of the one-way valve, and improves engine knock control and thermal efficiency.
Smart Images
Figure CN121976899A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of vehicle engineering technology, and more particularly to an eddy current diode, an exhaust gas recirculation system, and an automobile. Background Technology
[0002] The mainstream technology for natural gas engines in the China VI emission standard stage is stoichiometric combustion plus EGR technology, with a three-way catalytic converter used in the aftertreatment system. The current mainstream EGR technology is high-pressure EGR, which specifically involves taking air from before the turbine, passing it through an EGR cooler, and then mixing it with air and natural gas before it enters the engine cylinders for combustion. This technology faces the challenge of increasing the EGR rate in the low-to-medium speed, high-load range, affecting engine knock control and thermal efficiency. The current mainstream solution is to add a one-way valve after the EGR cooler to utilize exhaust pulses to increase the EGR rate at low speeds and high loads. While the one-way valve is effective, it suffers from issues such as valve plate breakage after prolonged operation and reliability risks.
[0003] Therefore, there is an urgent need for an eddy current diode, an exhaust gas recirculation system, and a car to solve the above problems. Summary of the Invention
[0004] The purpose of this invention is to provide an eddy current diode to replace a one-way valve and improve EGR driving capability.
[0005] On one hand, the present invention provides an eddy current diode, the eddy current diode comprising: A vortex disk has a vortex cavity inside, the cross-section of which is circular. The vortex cavity includes an inlet and several outlets. The axis of the inlet coincides with the center line of the vortex cavity, and the axis of the outlets coincides with the tangent of the vortex cavity. A protrusion is formed inside the vortex cavity. The protrusion includes a conical surface. The axis of the conical surface coincides with the axis of the inlet. The top of the protrusion faces the inlet. The radius of the inlet is smaller than the maximum radius of the conical surface. An axial tube is connected to the inlet of the aforementioned vortex cavity, and the axis of the axial tube coincides with the axis of the aforementioned inlet. The tangential tube is connected to the output port of the aforementioned vortex cavity in a one-to-one correspondence, and the axis of the tangential tube coincides with the axis of the aforementioned output port.
[0006] As a preferred embodiment of the aforementioned eddy current diode, the cross-section of the aforementioned axial tube is circular. The aforementioned axial tube includes an axial intake section and an axial transition section connected in sequence. The aforementioned axial transition section includes a large-diameter end and a small-diameter end connected to each other. The small-diameter end is connected to the aforementioned axial intake section, and the aforementioned large-diameter end is connected to the aforementioned air inlet. From the aforementioned small-diameter end to the aforementioned large-diameter end, the inner diameter of the aforementioned axial tube gradually increases. The inner diameter dimension D1 of the aforementioned axial intake section satisfies D1 > D3 > D2, where D2 is the inner diameter dimension of the aforementioned small-diameter end, and D3 is the inner diameter dimension of the aforementioned large-diameter end.
[0007] As a preferred embodiment of the aforementioned eddy current diode, a first rounded chamfer is provided between the aforementioned axial intake section and the aforementioned axial transition section, and the aforementioned first rounded chamfer is recessed into the aforementioned axial tube.
[0008] As a preferred embodiment of the aforementioned eddy current diode, the height dimension L1 of the protrusion satisfies 1 / 2×L2≤L1≤3 / 4×L2, where L2 is the axial dimension of the aforementioned eddy cavity.
[0009] As a preferred embodiment of the aforementioned eddy current diode, the maximum radial dimension D4 of the aforementioned protrusion satisfies D4<D5, 5×L2≤D5≤7×L2, where D5 is the maximum radial dimension of the aforementioned eddy cavity, and L2 is the axial dimension of the aforementioned eddy cavity.
[0010] As a preferred embodiment of the aforementioned eddy current diode, the cross-section of the aforementioned tangential tube is circular. The aforementioned tangential tube includes a tangential inlet end and a tangential outlet end. The aforementioned tangential inlet end is connected to the outlet of the aforementioned eddy cavity. From the aforementioned tangential inlet end to the aforementioned tangential outlet end, the radius of the aforementioned tangential tube gradually increases. The inner diameter dimension D6 of the aforementioned tangential inlet end satisfies D6=D1, where D1 is the inner diameter dimension of the axial inlet section of the aforementioned axial tube. The inner diameter dimension D7 of the aforementioned tangential outlet end satisfies D7=L2, where L2 is the axial dimension of the aforementioned eddy cavity.
[0011] As a preferred embodiment of the aforementioned eddy current diode, the angle between the generatrix of the inner wall of the tangential tube and the axis of the tangential tube is α, satisfying 4° < α < 8°.
[0012] An exhaust gas recirculation system is also provided, applicable to an engine assembly. The engine assembly includes an engine body and an air supply device, including a cooler, a radiator, a venturi tube, and the aforementioned eddy current diode. The cooler includes a first heat exchange side and a second heat exchange side capable of exchanging heat with each other. The input end a of the first heat exchange side is connected to the exhaust port of the engine body. The output end a of the first heat exchange side, the axial tube, the tangential tube, and the intake port of the venturi tube are sequentially connected. The exhaust port of the venturi tube is connected to the intake port of the engine body. The power air inlet of the venturi tube is connected to the output end of the air supply device. The input end b of the second heat exchange side is connected to the refrigerant output end of the engine body. The output end b of the second heat exchange side is connected to the input end of the radiator. The output end of the radiator is connected to the refrigerant input end of the engine body.
[0013] An exhaust gas recirculation system is also provided, applicable to an engine assembly, the engine assembly including an engine body and an air supply device, characterized in that it includes a cooler, a radiator, a venturi tube, and the aforementioned eddy current diode; the cooler includes a first heat exchange side and a second heat exchange side capable of exchanging heat with each other; the axial tube is used to communicate with the exhaust port of the engine body; the tangential tube, the first heat exchange side, and the intake port of the venturi tube are sequentially connected; the exhaust port of the venturi tube is used to communicate with the intake port of the engine body; the power air inlet of the venturi tube is used to communicate with the output end of the air supply device; the input end of the second heat exchange side is used to communicate with the refrigerant output end of the engine body; the output end of the second heat exchange side is used to communicate with the input end of the radiator; and the output end of the radiator is used to communicate with the refrigerant input end of the engine body.
[0014] A vehicle is also provided, which includes the aforementioned eddy current diode, or includes the aforementioned exhaust gas recirculation system.
[0015] The eddy current diode provided by this invention has at least the following beneficial effects: The eddy current diode includes...
[0016] This invention provides an eddy current diode, comprising a vortex disk, an axial tube, and a tangential tube. The vortex disk forms a vortex cavity with a circular cross-section. The vortex cavity includes an input port and several output ports. The axis of the input port coincides with the center line of the vortex cavity, and the axis of the output ports coincides with the tangent of the vortex cavity. A protrusion is formed within the vortex cavity, including a conical surface. The axis of the conical surface coincides with the axis of the input port, and the apex of the protrusion faces the input port. The radius of the input port is smaller than the maximum radius of the protrusion. The axial tube is connected to the input port of the vortex cavity, and its axis coincides with the axis of the input port. The tangential tubes are connected to the output ports of the vortex cavity one-to-one, and their axes coincide with the axes of the output ports.
[0017] For example, the vortex disk includes a top wall, a bottom wall, and peripheral side walls. The top wall is parallel to the bottom wall, and the peripheral side walls connect the top wall and the bottom wall and form a seal along the circumference. The inner wall of the vortex disk encloses a vortex cavity, which is a rotating space with a circular cross-section. The top wall of the vortex disk has an inlet, which is a through hole, one end of which communicates with the vortex cavity. The axis of the inlet coincides with the axis of the vortex cavity. Inside the vortex cavity, the bottom wall of the vortex disk has a protrusion. The side wall of the protrusion is a conical surface. The large-diameter end of the conical surface is the bottom end, the bottom of the protrusion is formed on the bottom wall, and the small-diameter end of the conical surface is the top end. The top end of the protrusion faces the inlet, and the axis of the conical surface coincides with the axis of the vortex cavity. The axis of the axial tube coincides with the axis of the inlet of the vortex disk. The maximum radius of the cone surface is the radius of the bottom end. The radius of the inlet is smaller than the maximum radius of the cone surface, which is the axial projection of the vortex cavity. The outline of the inlet is projected onto the cone surface. The peripheral sidewall of the vortex disk has an outlet, which is a through hole. One end of the outlet is connected to the vortex cavity, and the axis of the outlet coincides with the tangent of the vortex cavity. One end of the axial tube is connected to the inlet of the vortex disk, and the other end is used to obtain fluid. The axis of the axial tube coincides with the axis of the inlet. One end of the tangential tube is connected to the outlet of the vortex disk, and the other end is used to output fluid. The axis of the tangential tube coincides with the axis of the outlet.
[0018] The flow direction of fluid from the axial tube to the tangential tube is denoted as the forward direction, and the flow direction from the tangential tube to the axial tube is denoted as the reverse direction. When the fluid passes through the eddy current diode in the forward direction, the fluid enters the vortex cavity along the axial tube. After contacting the convex conical surface along the axial direction, the fluid diffuses in all directions along the conical surface and exits from the tangential tube. In this way, the fluid streamlines smoothly during forward flow, which can effectively reduce forward flow resistance. When the fluid passes through the eddy current diode in the opposite direction, it enters the vortex cavity along the tangential tube. Due to the rotating structure of the vortex cavity, the fluid rotates along the annular sidewall of the vortex cavity, forming a vortex. This not only increases the length of the flow path and turbulence loss, but also causes the pressure to gradually decrease from the edge to the center of rotation in the vortex, making it difficult for the fluid to be discharged through the axial tube directly opposite the center of rotation. Furthermore, since a protrusion is set at the center of the vortex cavity, the protrusion occupies the original position of the vortex core, and its conical surface plays a guiding role. By destroying the free vortex core, increasing the contact area between the fluid and the solid wall, and inducing stronger turbulence and secondary flow, the mechanical energy loss during reverse flow is greatly increased. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the first structure of the eddy current diode in an embodiment of the present invention; Figure 2 This is a schematic diagram of the second structure of the eddy current diode in an embodiment of the present invention; Figure 3 This is a schematic diagram of the third structure of the eddy current diode in an embodiment of the present invention; Figure 4This is a schematic diagram of the fourth structure of the eddy current diode in an embodiment of the present invention; Figure 5 This is a schematic diagram of the fifth structure of the eddy current diode in an embodiment of the present invention.
[0020] In the picture: 1. Eddy current diode; 11. Scroll disk; 111. Scroll cavity; 112. Protrusion; 12. Axial tube; 121. Axial intake section; 122. Axial transition section; 13. Tangential tube; 131. Tangential intake end; 132. Tangential exhaust end; 2. Cooler; 3. Radiator; 4. Venturi tube; 5. EGR valve; 6. Throttle body; 7. Intercooler; 8. Turbocharger; 9. Air filter; 10. Aftertreatment system; 100. Engine body. Detailed Implementation
[0021] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0022] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Furthermore, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0023] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.
[0024] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.
[0025] like Figures 1 to 3 As shown, the present invention provides an eddy current diode 1, which includes a vortex disk 11, an axial tube 12, and a tangential tube 13. The vortex disk 11 forms a vortex cavity 111 inside, the cross-section of which is circular. The vortex cavity 111 includes an input port and several output ports. The axis of the input port coincides with the center line of the vortex cavity 111, and the axis of the output ports coincides with the tangent of the vortex cavity 111. A protrusion 112 is formed inside the vortex cavity 111, and the protrusion 112 includes a conical surface. The axis of the conical surface coincides with the axis of the input port, and the top of the protrusion 112 faces the input port. The radius of the input port is smaller than the maximum radius of the protrusion 112. The axial tube 12 is connected to the input port of the vortex cavity 111, and its axis coincides with the axis of the input port. The tangential tube 13 is connected to each output port of the vortex cavity 111 in a corresponding manner, and its axis coincides with the axis of the output port.
[0026] For example, the vortex disk 11 includes a top wall, a bottom wall, and peripheral side walls. The top wall is parallel to the bottom wall, and the peripheral side walls connect the top wall and the bottom wall and form a seal along the circumference. The inner wall of the vortex disk 11 encloses a vortex cavity 111, which is a rotating space with a circular cross-section. The top wall of the vortex disk 11 has an inlet, which is a through hole. One end of the inlet communicates with the vortex cavity 111, and the axis of the inlet coincides with the axis of the vortex cavity 111. Inside the vortex cavity 111, the bottom wall of the vortex disk 11 has a protrusion 112. The side wall of the protrusion 112 is a conical surface. The large-diameter end of the conical surface is the bottom end, the bottom of the protrusion 112 is formed on the bottom wall, and the small-diameter end of the conical surface is the top end. The top end of the protrusion 112 faces the inlet, and the axis of the conical surface coincides with the axis of the vortex cavity 111. The axes of the protrusion 112 and the inlet of the vortex 11 coincide, meaning the axis of the protrusion 112 coincides with the axis of the inlet of the vortex 11. The maximum radius of the cone is the radius of the bottom end. The radius of the inlet is smaller than the maximum radius of the cone, which is the axial projection of the vortex cavity 111. The outline of the inlet is projected onto the cone. The vortex 11 has an outlet on its peripheral sidewall. The outlet is a through hole, with one end connected to the vortex cavity 111. The axis of the outlet coincides with the tangent of the vortex cavity 111. One end of the axial tube 12 is connected to the inlet of the vortex 11, and the other end is used to obtain fluid. The axis of the axial tube 12 coincides with the axis of the inlet. One end of the tangential tube 13 is connected to the outlet of the vortex 11, and the other end is used to output fluid. The axis of the tangential tube 13 coincides with the axis of the outlet.
[0027] The flow direction of fluid from the axial tube 12 to the tangential tube 13 is denoted as the forward direction, and the flow direction from the tangential tube 13 to the axial tube 12 is denoted as the reverse direction. When the fluid passes through the eddy current diode 1 in the forward direction, the fluid enters the vortex cavity 111 along the axial tube 12. After the fluid contacts the conical surface of the protrusion 112 along the axial direction, it diffuses in all directions along the conical surface and is discharged from the tangential tube 13. In this way, the fluid streamline is smooth during forward flow, which can effectively reduce the forward flow resistance. When the fluid passes through the eddy current diode 1 in the reverse direction, the fluid enters the vortex cavity 111 along the tangential pipe 13. Due to the rotating structure of the vortex cavity 111, the fluid rotates along the annular sidewall of the vortex cavity 111, forming a vortex. This not only increases the length of the flow path and the turbulence loss, but also causes the pressure to gradually decrease from the edge to the center of rotation in the vortex, making it difficult for the fluid to be discharged through the axial pipe 12 facing the center of rotation. Furthermore, since a protrusion 112 is provided at the center of the vortex cavity 111, the protrusion 112 occupies the original position of the vortex core, and its conical surface plays a guiding role. By destroying the free vortex core, increasing the contact area between the fluid and the solid wall, and inducing stronger turbulence and secondary flow, the mechanical energy loss during reverse flow is greatly increased.
[0028] Preferably, the vortex cavity 111 is drum-shaped, that is, the peripheral sidewall of the vortex cavity 111 protrudes outward in an arc shape 112.
[0029] For example, the protrusion 112 is conical or frustum-shaped. Preferably, the protrusion 112 is conical or frustum-shaped.
[0030] Optionally, the cross-section of the axial pipe 12 is circular. The axial pipe 12 includes an axial intake section 121 and an axial transition section 122 connected in sequence. The axial transition section 122 includes a large-diameter end and a small-diameter end that are connected to each other. The small-diameter end is connected to the axial intake section 121, and the large-diameter end is connected to the air inlet. From the small-diameter end to the large-diameter end, the inner diameter of the axial pipe 12 gradually increases. The inner diameter dimension D1 of the axial intake section 121 satisfies D1 > D3 > D2, where D2 is the inner diameter dimension of the small-diameter end and D3 is the inner diameter dimension of the large-diameter end.
[0031] Thus, through the gradual expansion design of the axial transition section 122, the fluid can gradually decelerate and diffuse within the axial tube 12 before entering the air inlet. The flow area of the fluid increases slowly rather than abruptly, avoiding excessive bending of the streamlines and flow separation. This significantly reduces the local resistance loss at the inlet and helps maintain the smoothness of the forward flow.
[0032] It should be noted that increasing the dimensions of D1, D2, and D3 will reduce the pressure drop of the airflow in front of vortex 111, but it will also reduce the gas flow velocity, lower the Reynolds number, and result in a smaller gas pulse.
[0033] For example, the value of D1 ranges from 28mm to 46mm; the value of D2 ranges from 14mm to 26mm; and the value of D3 ranges from 20mm to 30mm.
[0034] Optionally, a first rounded chamfer is provided between the axial intake section 121 and the axial transition section 122, and the first rounded chamfer is recessed into the axial pipe 12.
[0035] For example, the radius R1 of the first chamfer is between 14 mm and 20 mm.
[0036] Optionally, the height dimension L1 of the protrusion 112 satisfies 1 / 2×L2≤L1≤3 / 4×L2, where L2 is the axial dimension of the vortex cavity 111.
[0037] For example, the value of L2 ranges from 20mm to 30mm.
[0038] Optionally, the maximum radial dimension D4 of the protrusion 112 satisfies D4 < D5, 5×L2≤D5≤7×L2, where D5 is the maximum radial dimension of the vortex cavity 111 and L2 is the axial dimension of the vortex cavity 111.
[0039] For example, the value of D4 ranges from 8mm to 20mm, and the value of L2 ranges from 20mm to 30mm.
[0040] Optionally, the cross-section of the tangential pipe 13 is circular. The tangential pipe 13 includes a tangential air inlet end 131 and a tangential exhaust end 132. The tangential air inlet end 131 is connected to the exhaust port of the vortex cavity 111. From the tangential air inlet end 131 to the tangential exhaust end 132, the radius of the tangential pipe 13 gradually increases. The inner diameter dimension D6 of the tangential air inlet end 131 satisfies D6=D1, where D1 is the inner diameter dimension of the axial air inlet section 121 of the axial pipe 12. The inner diameter dimension D7 of the tangential exhaust end 132 satisfies D7=L2, where L2 is the axial dimension of the vortex cavity 111.
[0041] For example, the value of D6 ranges from 28mm to 46mm, and the value of D7 ranges from 20mm to 30mm.
[0042] Optionally, the angle between the generatrix of the inner wall of the tangential tube 13 and the axis of the tangential tube 13 is α, satisfying 4° < α < 8°.
[0043] like Figure 4 As shown, the present invention provides an exhaust gas recirculation system applicable to an engine assembly. The engine assembly includes an engine body 100 and an air supply device. The exhaust gas recirculation system includes a cooler 2, a radiator 3, a venturi tube 4, and the aforementioned eddy current diode 1. The cooler 2 includes a first heat exchange side and a second heat exchange side capable of exchanging heat with each other. The input end a of the first heat exchange side is connected to the exhaust port of the engine body 100. The output end a of the first heat exchange side, the axial pipe 12, the tangential pipe 13, and the intake port of the venturi tube 4 are sequentially connected. The exhaust port of the venturi tube 4 is connected to the intake port of the engine body 100, and the power air inlet of the venturi tube 4 is connected to the output end of the air supply device. The input end b of the second heat exchange side is connected to the refrigerant output end of the engine body 100, and the output end b of the second heat exchange side is connected to the input end of the radiator 3. The output end of the radiator 3 is connected to the refrigerant input end of the engine body 100.
[0044] Thus, the air supply device provides air to the engine body 100. The air passes sequentially through the power inlet and exhaust port of the Venturi tube 4 before entering the engine body 100. The exhaust gas discharged from the engine body 100 through the exhaust port is cooled by the cooler 2, then passes through the eddy current diode 1 and enters the intake port of the Venturi tube 4. Because a high-speed airflow is formed within the Venturi tube 4, the exhaust gas is more easily drawn in and mixed with the air fluid within the Venturi tube 4 before entering the engine body 100. The eddy current diode 1 replaces the one-way valve, satisfying the requirement of unidirectional exhaust gas flow.
[0045] like Figure 5As shown, the present invention also provides another exhaust gas recirculation system suitable for an engine assembly. The engine assembly includes an engine body 100 and an air supply device. The exhaust gas recirculation system includes a cooler 2, a radiator 3, a venturi tube 4, and the aforementioned eddy current diode 1. The cooler 2 includes a first heat exchange side and a second heat exchange side capable of exchanging heat with each other. An axial pipe 12 is used to communicate with the exhaust port of the engine body 100. A tangential pipe 13, the first heat exchange side, and the intake port of the venturi tube 4 are connected in sequence. The exhaust port of the venturi tube 4 is used to communicate with the intake port of the engine body 100. The power air inlet of the venturi tube 4 is used to communicate with the output end of the air supply device. The input end of the second heat exchange side is used to communicate with the refrigerant output end of the engine body 100. The output end of the second heat exchange side is used to communicate with the input end of the radiator 3. The output end of the radiator 3 is used to communicate with the refrigerant input end of the engine body 100.
[0046] Furthermore, the exhaust gas recirculation system also includes an EGR valve 5, the input of which is connected to the output of the eddy current diode 1, and the output of which is connected to the intake port of the venturi tube 4.
[0047] Furthermore, the exhaust gas recirculation system also includes a throttle valve 6, the input end of which is connected to the output end of the air supply device, and the output end of the throttle valve 6 is connected to the power air inlet of the venturi tube 4.
[0048] Furthermore, the exhaust gas recirculation system also includes an intercooler 7, the input end of which is connected to the output end of the air supply device, and the output end of the intercooler 7 is connected to the input end of the throttle valve 6.
[0049] Furthermore, the exhaust gas recirculation system also includes a turbocharger 8, which comprises a turbine end and a compressor end. The input end of the compressor end is connected to the output end of the air supply device, and the output end of the compressor end is connected to the input end of the intercooler 7. The input end of the turbine end is connected to the output end of the engine body 100, and the output end of the turbine end is used to discharge part of the exhaust gas.
[0050] Furthermore, the exhaust gas recirculation system also includes an air filter 9, the input end of which is connected to the output end of the air supply device, and the output end of the air filter 9 is connected to the input end of the compressed air device.
[0051] Furthermore, the exhaust gas recirculation system also includes an after-processor 10, the input of which is connected to the output of the turbine end of the turbocharger 8, and the output of the after-processor 10 is used to discharge exhaust gas from the exhaust gas recirculation system.
[0052] For example, the post-processor 10 can be used to treat carbon monoxide and carbon oxides. It can also be used for particulate capture.
[0053] A vehicle is also provided, including the aforementioned eddy current diode 1, or including the aforementioned exhaust gas recirculation system.
[0054] 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 can make other variations or modifications based on the above description. 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 eddy current diode, characterized in that, include: A vortex disk (11) has a vortex cavity (111) inside it. The cross-section of the vortex cavity (111) is circular. The vortex cavity (111) includes an input port and several output ports. The axis of the input port coincides with the center line of the vortex cavity (111). The axis of the output port coincides with the tangent of the vortex cavity (111). A protrusion (112) is formed inside the vortex cavity (111). The protrusion (112) includes a conical surface. The axis of the conical surface coincides with the axis of the input port. The top of the protrusion (112) faces the input port. The radius of the input port is smaller than the maximum radius of the conical surface. An axial tube (12) is connected to the inlet of the vortex cavity (111), and the axis of the axial tube (12) coincides with the axis of the inlet. The tangential tube (13) is connected to the output port of the vortex cavity (111) in a one-to-one correspondence, and the axis of the tangential tube (13) coincides with the axis of the output port.
2. The eddy current diode according to claim 1, characterized in that, The axial tube (12) has a circular cross-section. The axial tube (12) includes an axial intake section (121) and an axial transition section (122) connected in sequence. The axial transition section (122) includes a large-diameter end and a small-diameter end that are connected to each other. The small-diameter end is connected to the axial intake section (121), and the large-diameter end is connected to the air inlet. From the small-diameter end to the large-diameter end, the inner diameter of the axial tube (12) gradually increases. The inner diameter dimension D1 of the axial intake section (121) satisfies D1 > D3 > D2, where D2 is the inner diameter dimension of the small-diameter end and D3 is the inner diameter dimension of the large-diameter end.
3. The eddy current diode according to claim 2, characterized in that, A first rounded chamfer is provided between the axial intake section (121) and the axial transition section (122), and the first rounded chamfer is recessed into the axial tube (12).
4. The eddy current diode according to claim 1, characterized in that, The height dimension L1 of the protrusion (112) satisfies 1 / 2×L2≤L1≤3 / 4×L2, where L2 is the axial dimension of the vortex cavity (111).
5. The eddy current diode according to claim 1, characterized in that, The maximum radial dimension D4 of the protrusion (112) satisfies D4<D5, 5×L2≤D5≤7×L2, where D5 is the maximum radial dimension of the vortex cavity (111) and L2 is the axial dimension of the vortex cavity (111).
6. The eddy current diode according to claim 1, characterized in that, The cross-section of the tangential tube (13) is circular. The tangential tube (13) includes a tangential air inlet end (131) and a tangential exhaust end (132). The tangential air inlet end (131) is connected to the exhaust port of the vortex cavity (111). From the tangential air inlet end (131) to the tangential exhaust end (132), the radius of the tangential tube (13) gradually increases. The inner diameter dimension D6 of the tangential air inlet end (131) satisfies D6=D1, where D1 is the inner diameter dimension of the axial air inlet section (121) of the axial tube (12). The inner diameter dimension D7 of the tangential exhaust end (132) satisfies D7=L2, where L2 is the axial dimension of the vortex cavity (111).
7. The eddy current diode according to claim 1, characterized in that, The angle between the generatrix of the inner wall of the tangential tube (13) and the axis of the tangential tube is α, which satisfies 4° < α < 8°.
8. An exhaust gas recirculation system suitable for an engine assembly, said engine assembly including an engine body (100) and an air supply device, characterized in that, The system includes a cooler (2), a radiator (3), a venturi tube (4), and an eddy current diode (1) as described in any one of claims 1-7. The cooler (2) includes a first heat exchange side and a second heat exchange side capable of exchanging heat with each other. The input end a of the first heat exchange side is connected to the exhaust port of the engine body (100). The output end a of the first heat exchange side, the axial tube (12), the tangential tube (13), and the intake port of the venturi tube (4) are connected in sequence. The exhaust port of the venturi tube (4) is connected to the intake port of the engine body (100), and the power air inlet of the venturi tube (4) is connected to the output end of the air supply device. The input end b of the second heat exchange side is connected to the refrigerant output end of the engine body (100), and the output end b of the second heat exchange side is connected to the input end of the radiator (3). The output end of the radiator (3) is connected to the refrigerant input end of the engine body (100).
9. An exhaust gas recirculation system suitable for an engine assembly, said engine assembly including an engine body (100) and an air supply device, characterized in that, The device includes a cooler (2), a radiator (3), a venturi tube (4), and an eddy current diode (1) according to any one of claims 1-7. The cooler (2) includes a first heat exchange side and a second heat exchange side capable of exchanging heat with each other. The axial tube (12) is used to communicate with the exhaust port of the engine body (100). The tangential tube (13), the first heat exchange side, and the intake port of the venturi tube (4) are connected in sequence. The exhaust port of the venturi tube (4) is used to communicate with the intake port of the engine body (100). The power air inlet of the venturi tube (4) is used to communicate with the output end of the air supply device. The input end of the second heat exchange side is used to communicate with the refrigerant output end of the engine body (100). The output end of the second heat exchange side is connected with the input end of the radiator (3). The output end of the radiator (3) is used to communicate with the refrigerant input end of the engine body (100).
10. A car, characterized in that, Includes the eddy current diode (1) according to any one of claims 1-7, or includes the exhaust gas recirculation system according to claim 8 or 9.