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CN-121976899-A - Vortex diode, exhaust gas circulation system and automobile

CN121976899ACN 121976899 ACN121976899 ACN 121976899ACN-121976899-A

Abstract

The invention relates to the technical field of vehicle engineering, and particularly discloses a vortex diode, an exhaust gas circulation system and an automobile. The vortex disc is internally provided with a vortex cavity, the cross section of the vortex cavity is circular, the vortex cavity comprises an input port and a plurality of output ports, the axis of the input port is coincident with the central line of the vortex cavity, the axis of the output port is coincident with the tangent line of the vortex cavity, a bulge is formed in the vortex cavity, the bulge comprises a conical surface, the axis of the conical surface is coincident with the axis of the input port, the top end of the bulge faces the input port, the radius of the input port is smaller than the maximum radius of the bulge, an axial pipe is communicated with the input port of the vortex cavity, the axis of the axial pipe is coincident with the axis of the input port, the tangential pipe is correspondingly communicated with the output ports of the vortex cavity one by one, and the axis of the tangential pipe is coincident with the axis of the output ports. Instead of the check valve, for improving the EGR driving ability.

Inventors

  • LI JIAXING
  • MA LI
  • LIU YANG
  • XU TIANJIAO
  • CHEN XING

Assignees

  • 一汽解放汽车有限公司

Dates

Publication Date
20260505
Application Date
20260330

Claims (10)

  1. 1. An eddy current diode, comprising: The vortex disc (11) is internally provided with a vortex cavity (111), the cross section of the vortex cavity (111) is circular, the vortex cavity (111) comprises an input port and a plurality of output ports, the axis of the input port is coincident with the central line of the vortex cavity (111), the axis of the output port is coincident with the tangent line of the vortex cavity (111), a bulge (112) is formed in the vortex cavity (111), the bulge (112) comprises a conical surface, the axis of the conical surface is coincident with the axis of the input port, the top end of the bulge (112) faces the input port, and the radius of the input port is smaller than the maximum radius of the conical surface; an axial tube (12) communicating with an input port of the vortex chamber (111), the axis of the axial tube (12) coinciding with the axis of the input port; and the tangential pipes (13) are communicated with the output ports of the vortex cavities (111) in a one-to-one correspondence manner, and the axes of the tangential pipes (13) are coincident with the axes of the output ports.
  2. 2. The vortex diode according to claim 1, characterized in that the cross section of the axial tube (12) is circular, the axial tube (12) comprises an axial air inlet section (121) and an axial transition section (122) which are communicated in sequence, the axial transition section (122) comprises a large diameter end and a small diameter end which are communicated with each other, the small diameter end is communicated with the axial air inlet section (121), the large diameter end is communicated with the air inlet, the inner diameter of the axial tube (12) is gradually increased from the small diameter end to the large diameter end, the inner diameter dimension D1 of the axial air inlet section (121) satisfies D1> D3> D2, D2 is the inner diameter dimension of the small diameter end, and D3 is the inner diameter dimension of the large diameter end.
  3. 3. The vortex diode according to claim 2, characterized in that a first circular arc chamfer is provided between the axial inlet section (121) and the axial transition section (122), which first circular arc chamfer is recessed into the axial tube (12).
  4. 4. The vortex diode according to claim 1, characterized in that the height dimension L1 of the protrusion (112) satisfies 1/2 x L2 +.l1 +.3/4 x L2, L2 being the axial dimension of the vortex chamber (111).
  5. 5. The vortex diode according to claim 1, characterized in that the maximum radial dimension D4 of the protrusion (112) satisfies D4< D5,5 xl2≤d5≤7xl2, D5 being the maximum radial dimension of the vortex chamber (111), L2 being the axial dimension of the vortex chamber (111).
  6. 6. The vortex diode according to claim 1, characterized in that the tangential tube (13) has a circular cross section, the tangential tube (13) comprises a tangential inlet end (131) and a tangential outlet end (132), the tangential inlet end (131) communicates with the outlet of the vortex chamber (111), the tangential outlet end (132) is directed from the tangential inlet end (131), the radius of the tangential tube (13) increases gradually, the inner diameter dimension D6 of the tangential inlet end (131) is such that d6=d1, D1 is the inner diameter dimension of the axial inlet section (121) of the axial tube (12), the inner diameter dimension D7 of the tangential outlet end (132) is such that d7=l2, L2 is the axial dimension of the vortex chamber (111).
  7. 7. The vortex diode according to claim 1, characterized in that the angle α of the generatrix of the inner wall of the tangential tube (13) with the axis of the tangential tube is 4 ° < α <8 °.
  8. 8. An exhaust gas circulation system suitable for an engine assembly, the engine assembly comprising an engine body (100) and an air supply device, characterized by comprising a cooler (2), a radiator (3), a venturi tube (4) and the vortex diode (1) according to any one of claims 1-7, wherein the cooler (2) comprises a first heat exchange side and a second heat exchange side which can exchange heat with each other, an input end a of the first heat exchange side is used for being communicated with an exhaust port of the engine body (100), an output end a of the first heat exchange side, an axial tube (12), a tangential tube (13) and an air suction hole of the venturi tube (4) are sequentially communicated, an exhaust hole of the venturi tube (4) is used for being communicated with an air suction port of the engine body (100), a power gas inlet of the venturi tube (4) is used for being communicated with an output end of the air supply device, an input end b of the second heat exchange side is used for being communicated with a refrigerant output end of the engine body (100), and an output end b of the second heat exchange side is used for being communicated with an input end of the radiator (3) of the engine body (100).
  9. 9. An exhaust gas circulation system suitable for an engine assembly, the engine assembly comprising an engine body (100) and a gas supply device, and being characterized by comprising a cooler (2), a radiator (3), a venturi tube (4) and the vortex diode (1) according to any one of claims 1-7, wherein the cooler (2) comprises a first heat exchange side and a second heat exchange side which can exchange heat with each other, the axial tube (12) is used for being communicated with a gas outlet of the engine body (100), the tangential tube (13), the first heat exchange side and a gas suction hole of the venturi tube (4) are sequentially communicated, a gas outlet of the venturi tube (4) is used for being communicated with the gas suction hole of the engine body (100), a power gas inlet of the venturi tube (4) is used for being communicated with a refrigerant output end of the engine body (100), an output end of the second heat exchange side is communicated with a gas inlet of the radiator (3), and an output end of the venturi tube (4) is used for being communicated with a refrigerant input end of the engine body (100).
  10. 10. An automobile, characterized by comprising a vortex diode (1) according to any one of claims 1-7, or by comprising an exhaust gas recirculation system according to claim 8 or 9.

Description

Vortex diode, exhaust gas circulation system and automobile Technical Field The invention relates to the technical field of vehicle engineering, in particular to an eddy current diode, an exhaust gas circulation system and an automobile. Background The main flow technical route of the natural gas engine in the six-emission stage is equivalent combustion plus EGR technical route, and the aftertreatment system adopts a three-way catalyst. The main stream of the EGR technology currently is a high-pressure EGR technology, more specifically, the EGR technology is to take gas from the front of a turbine, pass through an EGR cooler, then mix with air and natural gas after passing through an EGR valve, and then enter an engine cylinder for combustion. The technical route has the difficulty that the EGR rate is difficult to lift in a medium-low speed and large load area, and the knock control and the heat efficiency of the engine are affected. The current mainstream solution is to add the check valve behind the EGR cooler to be used for utilizing the exhaust pulse to increase the EGR rate of low rotational speed heavy load, utilize the check valve effect obvious, but have the problem that the fracture exists and take place the reliability risk after the long-time operation of check valve block. Therefore, there is a need for an eddy current diode, an exhaust gas recirculation system and an automobile to solve the above problems. Disclosure of Invention The invention aims to provide a vortex diode which is used for replacing a one-way valve and is used for improving EGR driving capability. In one aspect, the present invention provides an eddy current diode comprising: a scroll plate having a circular cross section, wherein the scroll plate has a scroll chamber formed therein, the scroll chamber includes an input port and a plurality of output ports, the axis of the input port coincides with the center line of the scroll chamber, the axis of the output port coincides with the tangent line of the scroll chamber, a protrusion is formed in the scroll chamber, the protrusion includes a tapered surface, the axis of the tapered surface coincides with the axis of the input port, the tip of the protrusion faces the input port, and the radius of the input port is smaller than the maximum radius of the tapered surface; an axial pipe communicating with the input port of the scroll chamber, the axial pipe having an axis coincident with the axis of the input port; and the tangential pipes are communicated with the output ports of the vortex cavities in a one-to-one correspondence manner, and the axes of the tangential pipes are coincident with the axes of the output ports. As a preferable mode of the vortex diode, a cross section of the axial tube is circular, the axial tube includes an axial air inlet section and an axial transition section which are sequentially communicated, the axial transition section includes a large diameter end and a small diameter end which are mutually communicated, the small diameter end is communicated with the axial air inlet section, the large diameter end is communicated with the air inlet, an inner diameter of the axial tube is gradually increased from the small diameter end to the large diameter end, an inner diameter dimension D1 of the axial air inlet section satisfies D1> D3> D2, D2 is an inner diameter dimension of the small diameter end, and D3 is an inner diameter dimension of the large diameter end. As a preferable mode of the vortex diode, a first arc chamfer is arranged between the axial air inlet section and the axial transition section, and the first arc chamfer is recessed into the axial tube. As a preferable mode of the vortex diode, the height dimension L1 of the protrusion satisfies 1/2 xL 2≤L1≤3/4 xL 2, L2 being the axial dimension of the vortex cavity. As a preferable mode of the vortex diode, a maximum radial dimension D4 of the protrusion satisfies D4< D5,5×l2≤d5≤7xl2, D5 is a maximum radial dimension of the vortex chamber, and L2 is an axial dimension of the vortex chamber. As a preferable mode of the vortex diode, the tangential pipe has a circular cross section, the tangential pipe includes a tangential inlet end and a tangential outlet end, the tangential inlet end communicates with the outlet of the vortex chamber, the tangential inlet end is directed toward the tangential outlet end, the radius of the tangential pipe gradually increases, the inner diameter dimension D6 of the tangential inlet end satisfies d6=d1, D1 is the inner diameter dimension of the axial inlet section of the axial pipe, and the inner diameter dimension D7 of the tangential outlet end satisfies d7=l2, L2 is the axial dimension of the vortex chamber. As a preferable mode of the vortex diode, an angle α between a bus bar of an inner wall of the tangential pipe and an axis of the tangential pipe is 4 ° < α <8 °. The exhaust gas circulation system comprises an engine body and a gas supply device, wherein