CN214366320U - Exhaust aftertreatment system and vehicle - Google Patents

Exhaust aftertreatment system and vehicle Download PDF

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Publication number
CN214366320U
CN214366320U CN202022895418.7U CN202022895418U CN214366320U CN 214366320 U CN214366320 U CN 214366320U CN 202022895418 U CN202022895418 U CN 202022895418U CN 214366320 U CN214366320 U CN 214366320U
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Prior art keywords
bevel gear
tail gas
driving
fan
exhaust gas
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CN202022895418.7U
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Chinese (zh)
Inventor
张涛
谢欣男
王树森
梁昌水
曹原
丁保安
邬忠永
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Weichai Power Co Ltd
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Weichai Power Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/728—Onshore wind turbines

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  • Exhaust Gas After Treatment (AREA)

Abstract

The utility model discloses a tail gas aftertreatment system and vehicle, the utility model discloses a tail gas aftertreatment system is including the tail gas aftertreatment device who is used for carrying out the processing to vehicle exhaust for with the leading-in tail gas aftertreatment device's of tail gas mixer, be provided with the hybrid fan who is used for mixing tail gas in the tail gas mixer. The utility model discloses utilize the additional rotary power of hybrid fan to drive the tail gas intensive mixing, can improve the mixing uniformity of tail gas, and then improve the conversion efficiency of tail gas aftertreatment system to the pollutant, reduce whole car pollutant discharge effectively.

Description

Exhaust aftertreatment system and vehicle
Technical Field
The utility model relates to an engine exhaust handles technical field, and more specifically says, relates to a tail gas aftertreatment system, still relates to a vehicle.
Background
In the tail gas aftertreatment technique of engine, partial region that the tail gas mixes the inhomogeneous result in is too thick or rare, can cause the influence to the conversion efficiency of pollutant, and the long-time maldistribution of gas mixture can also reduce the life of catalyst moreover, causes exhaust system local temperature to hang down excessively and produces the crystallization.
At present, the exhaust power of mainly relying on tail gas self produces the whirl through whirl structures such as spinning disk or whirl hole at the flow in-process, mixes vehicle tail gas, and the homogeneity of mixing is relatively poor, has still increased exhaust resistance.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model discloses an aim at discloses an exhaust aftertreatment system to improve the mixing uniformity of tail gas, and then improve the conversion efficiency of exhaust aftertreatment system to the pollutant.
Another object of the present invention is to disclose a vehicle having the above exhaust gas after-treatment system.
In order to achieve the above object, the utility model discloses a following technical scheme:
an exhaust aftertreatment system comprising an exhaust aftertreatment device for treating vehicle exhaust, further comprising:
and the tail gas mixer is used for guiding tail gas into the tail gas post-treatment device, and a mixing fan for mixing the tail gas is arranged in the tail gas mixer.
Preferably, in the exhaust gas aftertreatment system, the blades of the mixing fan are arranged along the exhaust gas flow direction in the exhaust gas mixer.
Preferably, in the exhaust gas after-treatment system, the mixing fan is a centrifugal fan.
Preferably, in the exhaust gas after-treatment system, the driving member for driving the hybrid fan to rotate is a driving fan located at an exhaust port of the exhaust gas after-treatment device, and the driving fan is capable of rotating under the action of the exhaust pressure of the exhaust gas after-treatment device and wind power generated by vehicle speed running.
Preferably, in the exhaust gas after-treatment system, the driving fan is connected to the mixing fan through a transmission device.
Preferably, in the exhaust gas after-treatment system, the transmission device includes:
the transmission case is provided with an input shaft and an output shaft, the input shaft is coaxially connected with the driving fan, and the output shaft extends into the tail gas mixer;
the first driving bevel gear is arranged in the transmission case and sleeved on the input shaft;
the first driven bevel gear can be meshed with the first driving bevel gear, is arranged in the transmission box and is sleeved on the output shaft;
the second driving bevel gear is sleeved at the end part of the output shaft extending into the tail gas mixer;
and the second driven bevel gear is coaxially connected with a rotating shaft of the mixing fan and meshed with the second driving bevel gear.
Preferably, the exhaust gas aftertreatment system further comprises a driving member capable of driving the first driving bevel gear to move axially so as to mesh with and separate from the first driven bevel gear;
a controller for controlling the drive member;
when the vehicle speed is less than a target vehicle speed value or the engine speed is in an idle state and the duration time exceeds a target time interval, the controller controls the driving piece to drive the first driving bevel gear to be separated from the first driven bevel gear; when the vehicle speed is greater than the target vehicle speed value, the controller controls the driving piece to drive the first driving bevel gear to be meshed with the first driven bevel gear.
According to the above technical scheme, the utility model discloses a tail gas after-treatment system is including the tail gas after-treatment device that is used for carrying out the processing to vehicle exhaust for with the leading-in tail gas after-treatment device's of tail gas mixer, be provided with the hybrid fan who is used for mixing tail gas in the tail gas mixer.
The utility model discloses utilize the additional rotary power of hybrid fan to drive the tail gas intensive mixing, can improve the mixing uniformity of tail gas, and then improve the conversion efficiency of tail gas aftertreatment system to the pollutant, reduce whole car pollutant discharge effectively.
The utility model also discloses a vehicle, including tail gas aftertreatment system, tail gas aftertreatment system is any kind of above-mentioned tail gas aftertreatment system, because above-mentioned tail gas aftertreatment system has above-mentioned effect, the vehicle that has above-mentioned tail gas aftertreatment system has same effect, so this paper is no longer repeated.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an exhaust gas aftertreatment system according to an embodiment of the present invention;
FIG. 2 is a partially enlarged structural view of A in FIG. 1;
fig. 3 is a schematic structural diagram of a hybrid fan according to an embodiment of the present invention.
Detailed Description
The embodiment of the utility model discloses tail gas aftertreatment system can improve the mixing uniformity of tail gas, and then improves the conversion efficiency of tail gas aftertreatment system to the pollutant.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-3, an exhaust gas post-treatment system disclosed in the embodiment of the present invention includes an exhaust gas post-treatment device 1 for treating vehicle exhaust gas, an exhaust gas mixer 2 for guiding exhaust gas into the exhaust gas post-treatment device 1, and a mixing fan 10 for mixing exhaust gas is disposed in the exhaust gas mixer 2.
The utility model discloses utilize the rotary power of hybrid fan 10 additional to drive the tail gas intensive mixing, can improve the mixing uniformity of tail gas, and then improve the conversion efficiency of tail gas aftertreatment system to the pollutant, reduce whole car pollutant emission effectively.
The utility model discloses be applied to five, six stages of commercial car trades in state such as truck, passenger train, the device is simple, and the cost is lower.
Specifically, the utility model discloses an exhaust aftertreatment device 1 includes DOC, DPF, SCR. DOC (diesel oxidation catalyst for short) is used for catalytic oxidation to oxidize HC and CO in tail gas and part of SOF in PM, and NO is oxidized into NO2And participating in the rapid reaction of SCR. A DPF (particulate trap for short), which can trap particulate emissions before they enter the atmosphere; SCR (selective catalytic reduction for short) is to inject urea under the action of catalyst to selectively react with NO in flue gasxReaction to produce non-polluted N2And H2O。
Preferably, the blades of the mixing fan 10 are arranged in the exhaust gas flow direction in the exhaust gas mixer 2. The blades extend in the axial direction of the exhaust mixer 2 and do not block the flow of air. The utility model discloses a blade parallel with exhaust airflow direction rotates and drives the gas mixture, and is less to the exhaust resistance influence, does benefit to the discharge of tail gas.
Further, the mixing fan 10 is a centrifugal fan. The gas flow direction of the centrifugal fan is perpendicular to the rotating shaft, and the tail gas uniformly mixing effect is good. Of course, the above-mentioned mixing fan 10 may also adopt other types of fans capable of promoting air turbulence, such as an axial flow fan and the like.
In a specific embodiment, the driving member for driving the hybrid fan 10 to rotate is a driving fan 4 located at the exhaust port of the exhaust gas aftertreatment device 1, and the driving fan 4 can rotate under the action of the exhaust gas pressure of the exhaust gas aftertreatment device 1 and the wind force generated by the vehicle speed running. When the whole vehicle runs, the exhaust and natural wind drive the blades of the driving fan 4 to rotate, and further drive the mixing fan 10 to rotate, so that the tail gas is fully mixed.
In the embodiment, the power generated by natural wind and exhaust tail wind generated by vehicle speed running is used as the power source for driving the fan 4, so that an independent power source is not needed, the structure is simple, and the energy is saved.
It is to be understood that the present invention may also utilize a separate power source, such as an electric motor, to drive the rotation of the hybrid fan 10.
For ease of assembly, the driving fan 4 is connected to the mixing fan 10 via a transmission. Of course, depending on the actual layout, the driving fan 4 can also be directly coaxially connected to the mixing fan 10.
Preferably, the transmission device comprises a transmission case 6 provided with an input shaft 5 and an output shaft 3, the input shaft 5 is coaxially connected with the driving fan 4, and the output shaft 3 extends into the tail gas mixer 2; a first driving bevel gear 7 arranged in the transmission case 6 and sleeved on the input shaft 5; the first driven bevel gear 8 can be meshed with the first driving bevel gear 7, and the first driven bevel gear 8 is arranged in the transmission case 6 and sleeved on the output shaft 3; the second driving bevel gear 11 is sleeved at the end part of the output shaft 3 extending into the tail gas mixer 2; and a second driven bevel gear 12 coaxially connected to a rotation shaft of the mixing fan 10, the second driven bevel gear 12 being engaged with the second driving bevel gear 11.
Under the power that the natural wind that the speed of a motor vehicle produced and exhaust tail-gas were produced, drive fan 4 takes input shaft 5 to rotate together, drives output shaft 3 through first initiative bevel gear 7, first driven bevel gear 8 and rotates, and output shaft 3 passes through second initiative bevel gear 11, second driven bevel gear 12 and gives power transmission for hybrid fan 10 next, drives hybrid fan 10 and rotates, and then mixes the tail-gas in the tail-gas mixer 2.
The transmission device of the embodiment utilizes two bevel gear sets to transmit the power of the driving fan 4 to the hybrid fan 10, and has simple structure and small occupied space; of course, the transmission device may also be a chain transmission, a gear transmission or a belt transmission mechanism.
In order to further optimize the technical scheme, the exhaust gas aftertreatment system further comprises a driving piece which can drive the first driving bevel gear 7 to axially move so as to realize the engagement and disengagement with the first driven bevel gear 8; a controller 9 for controlling the driving member; when the vehicle speed is less than a target vehicle speed value or the engine speed is in an idle state and the duration time exceeds a target time interval, the controller 9 controls the driving piece to drive the first driving bevel gear 7 to be separated from the first driven bevel gear 8; when the vehicle speed is greater than the target vehicle speed value, the controller 9 controls the driving piece to drive the first driving bevel gear 7 to be meshed with the first driven bevel gear 8.
Specifically, the controller 9 employs an ECU (Electronic Control Unit, abbreviation of Electronic Control Unit). The target vehicle speed value is 20 km/h. The target time interval was 2 min.
When the whole vehicle runs at a low speed, bevel gears in the transmission case 6 are separated to drive the fan 4 to idle. When the vehicle speed is higher than 20km/h, bevel gears in the transmission case 6 are meshed to drive the fan 4 to drive the centrifugal fan in the tail gas mixer 2 to rotate through the transmission device; when the engine speed is in an idle state and the duration time exceeds 2min, bevel gears in the transmission case 6 are separated, and the driving fan 4 is recovered to an idle state.
Therefore, the centrifugal fan of the utility model can rotate when the exhaust emission is large, thereby prolonging the service life of the centrifugal fan.
It is understood that the first driving bevel gear 7 and the first driven bevel gear 8 of the present invention may be engaged at all times.
The embodiment of the utility model provides a still disclose a vehicle, including tail gas aftertreatment system, tail gas aftertreatment system is the tail gas aftertreatment system that any above-mentioned embodiment provided, can improve the mixing uniformity of tail gas, and then improves tail gas aftertreatment system to the conversion efficiency of pollutant, and its advantage is brought by tail gas aftertreatment system, and relevant part in above-mentioned embodiment is referred to specific please, just no longer gives details here.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (8)

1. An exhaust gas aftertreatment system comprising an exhaust gas aftertreatment device (1) for treating vehicle exhaust gases, characterized in that it further comprises:
the tail gas mixer (2) is used for guiding tail gas into the tail gas post-treatment device (1), and a mixing fan (10) used for mixing the tail gas is arranged in the tail gas mixer (2).
2. The exhaust gas aftertreatment system according to claim 1, characterized in that the blades of the mixing fan (10) are arranged in the exhaust gas flow direction in the exhaust gas mixer (2).
3. The exhaust gas aftertreatment system according to claim 1, wherein the mixing fan (10) is a centrifugal fan.
4. The exhaust gas aftertreatment system according to claim 1, wherein the driving element for driving the hybrid fan (10) in rotation is a driving fan (4) located at an exhaust port of the exhaust gas aftertreatment device (1), and the driving fan (4) is capable of rotating under the exhaust pressure of the exhaust gas aftertreatment device (1) and the wind force generated by vehicle speed running.
5. The exhaust gas aftertreatment system according to claim 4, characterized in that the driving fan (4) is connected with the mixing fan (10) by a transmission.
6. The exhaust aftertreatment system of claim 5, wherein the transmission comprises:
the tail gas mixer is characterized by comprising a transmission case (6) provided with an input shaft (5) and an output shaft (3), wherein the input shaft (5) is coaxially connected with the driving fan (4), and the output shaft (3) extends into the tail gas mixer (2);
the first driving bevel gear (7) is arranged in the transmission case (6) and sleeved on the input shaft (5);
the first driven bevel gear (8) can be meshed with the first driving bevel gear (7), and the first driven bevel gear (8) is arranged in the transmission case (6) and sleeved on the output shaft (3);
the second driving bevel gear (11) is sleeved at the end part of the output shaft (3) extending into the tail gas mixer (2);
and the second driven bevel gear (12) is coaxially connected with the rotating shaft of the mixing fan (10), and the second driven bevel gear (12) is meshed with the second driving bevel gear (11).
7. The exhaust aftertreatment system according to claim 6, further comprising a drive member capable of driving the first drive bevel gear (7) to move axially to engage and disengage the first driven bevel gear (8);
a controller (9) for controlling the drive member;
when the vehicle speed is less than a target vehicle speed value or the engine speed is in an idle state and the duration time exceeds a target time interval, the controller (9) controls a driving piece to drive the first driving bevel gear (7) to be separated from the first driven bevel gear (8); when the vehicle speed is greater than the target vehicle speed value, the controller (9) controls the driving piece to drive the first driving bevel gear (7) to be meshed with the first driven bevel gear (8).
8. A vehicle comprising an exhaust gas after-treatment system, characterized in that the exhaust gas after-treatment system is an exhaust gas after-treatment system according to any one of claims 1-7.
CN202022895418.7U 2020-12-03 2020-12-03 Exhaust aftertreatment system and vehicle Active CN214366320U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202022895418.7U CN214366320U (en) 2020-12-03 2020-12-03 Exhaust aftertreatment system and vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202022895418.7U CN214366320U (en) 2020-12-03 2020-12-03 Exhaust aftertreatment system and vehicle

Publications (1)

Publication Number Publication Date
CN214366320U true CN214366320U (en) 2021-10-08

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202022895418.7U Active CN214366320U (en) 2020-12-03 2020-12-03 Exhaust aftertreatment system and vehicle

Country Status (1)

Country Link
CN (1) CN214366320U (en)

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