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CN-122014389-A - Exhaust system, diesel engine and vehicle

CN122014389ACN 122014389 ACN122014389 ACN 122014389ACN-122014389-A

Abstract

The invention provides an exhaust system, a diesel engine and a vehicle, which comprise an exhaust aftertreatment device, a heating box assembly and a control valve assembly, wherein the exhaust aftertreatment device is provided with an exhaust pipe assembly, one end of the exhaust pipe assembly is provided with a first tail gas outlet, the heating box assembly is arranged adjacent to a urea mixing cavity of the exhaust aftertreatment device, the heating box assembly is arranged at a distance from the exhaust pipe assembly, part of the heating box assembly is connected with the exhaust aftertreatment device and is provided with a heating cavity, the heating cavity is communicated with an exhaust channel of the aftertreatment device of the exhaust pipe assembly through a diversion channel of the diversion pipe, part of the control valve assembly is arranged in the exhaust channel of the aftertreatment device, the control valve assembly is arranged at a distance from the heating box assembly, and part of the control valve assembly is connected with the diversion pipe. The invention aims to solve the technical problem that the traditional exhaust system is low Wen Niaosu and easy to crystallize.

Inventors

  • LIU SHOUSHUN

Assignees

  • 一汽解放汽车有限公司

Dates

Publication Date
20260512
Application Date
20260311

Claims (10)

  1. 1. An exhaust system, comprising: An exhaust aftertreatment device (50), the exhaust aftertreatment device (50) having an exhaust pipe assembly with a first exhaust gas outlet at one end; -a heating tank assembly (10), said heating tank assembly (10) being arranged adjacent to a urea mixing chamber (501) of said exhaust-gas aftertreatment device (50), said heating tank assembly (10) being arranged at a distance from said exhaust-gas pipe assembly, a part of said heating tank assembly (10) being connected to said exhaust-gas aftertreatment device (50), said heating tank assembly (10) having a heating chamber, said heating chamber being in communication with an aftertreatment-gas channel of said exhaust-gas pipe assembly via a shunt channel of a shunt tube (20); A control valve assembly (30), a portion of the control valve assembly (30) being disposed within the aftertreatment exhaust passage, the control valve assembly (30) being disposed a distance from the heating box assembly (10), the control valve assembly (30) being located below the shunt tube (20), a portion of the control valve assembly (30) being connected to the shunt tube (20); Wherein the control valve assembly (30) has a first operating position in which at least part of the exhaust gases exiting the exhaust gas aftertreatment device (50) is conducted into the heating chamber via the shunt tube (20), and wherein the control valve assembly (30) has a second operating position in which the exhaust gases are conducted out.
  2. 2. An exhaust system according to claim 1, characterized in that the exhaust system further comprises: Temperature sensor (40), temperature sensor (40) are located control valve subassembly (30) with shunt tubes (20) top, part temperature sensor (40) set up in the aftertreatment ware exhaust passage, temperature sensor (40) with heating cabinet subassembly (10) interval sets up, temperature sensor (40) with the blast pipe subassembly is connected, temperature sensor (40) are used for acquireing the temperature data of tail gas.
  3. 3. The exhaust system according to claim 1 or 2, characterized in that the control valve assembly (30) comprises: The driving module is positioned at one side of the exhaust pipe assembly, and part of the driving module is connected with the shunt pipe (20); the valve block module is positioned in the exhaust channel of the post-processor, the valve block module is rotationally connected with the exhaust pipe assembly, and the execution end of the driving module is connected with one end of the valve block module; the actuating end of the driving module is controlled to enable the valve plate module to be located at the first working position or the second working position.
  4. 4. The exhaust system of claim 3, wherein the valve plate module comprises: The rotating shaft (304) is arranged along the radial extension of the exhaust pipe assembly, part of the rotating shaft (304) is positioned in an exhaust channel of the post-processor, part of the rotating shaft (304) is rotationally connected with the exhaust pipe assembly, and the execution end of the driving module is connected with one end of the rotating shaft (304); The distribution valve plate (302) is arranged in the exhaust passage of the aftertreatment device, the distribution valve plate (302) is positioned at one side of the rotating shaft (304), and part of the distribution valve plate (302) is connected with the rotating shaft (304); the rotating shaft (304) can drive the distributing valve plate (302) to rotate by controlling the executing end of the driving module, so as to adjust the flow area of the exhaust channel of the post-processor passing through the tail gas.
  5. 5. The exhaust system of claim 4, wherein the drive module comprises: the driving unit (301), the driving unit (301) is arranged at intervals with the exhaust pipe assembly, and the fixed end of the driving unit (301) is connected with the shunt pipe (20); The rotary arm (303) is positioned on one side of the exhaust pipe assembly, one end of the rotary arm (303) is movably connected with the execution end of the driving unit (301), and the other end of the rotary arm (303) is connected with one end of the rotating shaft (304); Wherein, the actuating end of the driving unit (301) is controlled, so that the rotating arm (303) can drive the rotating shaft (304) to rotate.
  6. 6. The exhaust system according to claim 1, characterized in that the heating box assembly (10) comprises: The box body (101) is provided with the heating cavity, part of the box body (101) is connected with the exhaust aftertreatment device (50), the box body (101) is provided with a heating air inlet and a heating air outlet, the heating air inlet and the heating air outlet are respectively communicated with the heating cavity, one side of the exhaust pipe assembly is provided with a second exhaust port (504), and the heating air inlet is communicated with the second exhaust port (504) through the shunt pipe (20); The heating exhaust pipe (103), heating exhaust pipe (103) set up one side of box (101), heating exhaust pipe (103) one end with box (101) are connected, the heating gas outlet with heating exhaust pipe (103) heat post processor exhaust passage is linked together.
  7. 7. The exhaust system of claim 6, wherein the heating air inlet is located below the heating air outlet and/or the second air outlet (504) is located above the heating air inlet.
  8. 8. The exhaust system of claim 2, wherein the exhaust pipe assembly comprises: An upper exhaust pipe (502), wherein the upper exhaust pipe (502) is provided with a second exhaust inlet and a second exhaust outlet, the first exhaust inlet is communicated with the exhaust outlet of the exhaust aftertreatment device (50), part of the temperature sensor (40) is positioned in an upper exhaust channel of the upper exhaust pipe (502), and the temperature sensor (40) is connected with the upper exhaust pipe (502); Lower blast pipe (503), last blast pipe (502) have first tail gas import with first tail gas export, lower blast pipe (503) are located the below of going up blast pipe (502), the second tail gas export with first tail gas import is linked together, heating cabinet subassembly (10) with lower blast pipe (503) are passed through shunt tubes (20) are connected, and part control valve subassembly (30) set up in the lower exhaust passage of lower blast pipe (503), go up the exhaust passage with lower exhaust passage constitutes the aftertreatment ware exhaust passage.
  9. 9. A diesel engine comprising an exhaust system, characterized in that the exhaust system is an exhaust system according to any one of claims 1-8.
  10. 10. A vehicle comprising a diesel engine, wherein the diesel engine is the diesel engine of claim 9.

Description

Exhaust system, diesel engine and vehicle Technical Field The invention relates to the technical field of diesel engine exhaust, in particular to an exhaust system, a diesel engine and a vehicle. Background The problem that urea crystallization and uneven mixing of urea and tail gas easily occur in the traditional diesel engine exhaust aftertreatment system under low temperature working condition, exhaust waste heat can not be effectively utilized, the heating structure is unreasonable with exhaust aftertreatment ware overall arrangement, and tail gas split control precision is not enough, and then leads to tail gas purification inefficiency, exhaust system job stabilization nature poor. In view of the above problems, no effective solution has been proposed at present. Disclosure of Invention The invention mainly aims to provide an exhaust system, a diesel engine and a vehicle, so as to solve the technical problem that a traditional exhaust system is low Wen Niaosu and easy to crystallize. In order to achieve the above object, according to one aspect of the present invention, there is provided an exhaust system comprising an exhaust aftertreatment device having an exhaust pipe assembly with a first exhaust gas outlet at one end thereof, a heating tank assembly disposed adjacent to a urea mixing chamber of the exhaust aftertreatment device, the heating tank assembly being disposed at a distance from the exhaust pipe assembly, a portion of the heating tank assembly being connected to the exhaust aftertreatment device, the heating tank assembly having a heating chamber in communication with a aftertreatment exhaust gas passage of the exhaust pipe assembly through a shunt passage of the shunt tube, a control valve assembly disposed within the aftertreatment device exhaust passage, the control valve assembly being disposed at a distance from the heating tank assembly, the control valve assembly being located below the shunt tube, a portion of the control valve assembly being connected to the shunt tube, wherein the control valve assembly has a first operating position for directing at least a portion of exhaust gas discharged from the exhaust aftertreatment device into the heating chamber through the shunt tube, and a second operating position for directing the exhaust gas out of the heating chamber. Further, the exhaust system further comprises a temperature sensor, wherein the temperature sensor is positioned above the control valve assembly and the shunt pipe, part of the temperature sensor is arranged in an exhaust channel of the post-processor, the temperature sensor is arranged at intervals with the heating box assembly, the temperature sensor is connected with the exhaust pipe assembly, and the temperature sensor is used for acquiring temperature data of tail gas. The control valve assembly comprises a driving module, a valve plate module and a valve plate module, wherein the driving module is positioned on one side of the exhaust pipe assembly, a part of driving modules are connected with the shunt pipe, the valve plate module is positioned in an exhaust channel of the post-processor, the valve plate module is rotationally connected with the exhaust pipe assembly, and the execution end of the driving module is connected with one end of the valve plate module, wherein the execution end of the driving module is controlled to enable the valve plate module to be positioned at a first working position or a second working position. The valve plate module comprises a rotating shaft, a distributing valve plate and a driving module, wherein the rotating shaft is arranged in a radial extending mode along the exhaust pipe assembly, part of the rotating shaft is positioned in an exhaust channel of the post-processor, part of the rotating shaft is in rotating connection with the exhaust pipe assembly, the executing end of the driving module is connected with one end of the rotating shaft, the distributing valve plate is arranged in the exhaust channel of the post-processor, the distributing valve plate is positioned on one side of the rotating shaft, and part of the distributing valve plate is connected with the rotating shaft, wherein the rotating shaft can drive the distributing valve plate to rotate by controlling the executing end of the driving module so as to adjust the flow area of the exhaust channel of the post-processor, which passes through tail gas. The driving module comprises a driving unit, a rotating arm and a rotating arm, wherein the driving unit is arranged at intervals with the exhaust pipe assembly, the fixed end of the driving unit is connected with the shunt pipe, the rotating arm is positioned on one side of the exhaust pipe assembly, one end of the rotating arm is movably connected with the executing end of the driving unit, the other end of the rotating arm is connected with one end of the rotating shaft, and the executing end of the driving unit is controlled to enable the rotating arm to d