CN113482755A

CN113482755A - Aftertreatment ware and vehicle

Info

Publication number: CN113482755A
Application number: CN202110893057.9A
Authority: CN
Inventors: 黄凯; 杨泽辰; 朱光贞; 王魏男; 何广锐; 姚安峰; 郭力铭
Original assignee: FAW Jiefang Automotive Co Ltd
Current assignee: FAW Jiefang Automotive Co Ltd
Priority date: 2021-08-04
Filing date: 2021-08-04
Publication date: 2021-10-08
Anticipated expiration: 2041-08-04
Also published as: CN113482755B

Abstract

The application relates to an aftertreatment ware and vehicle. The post-processor comprises: the body, the sensing assembly and the protection box detachably mounted outside the body. The protection box has one and accepts the chamber to and the outside a plurality of wear-to-establish holes of chamber and protection box are accepted in the intercommunication, wherein, accept the chamber and be used for acceping sensing component's pencil, wear-to-establish hole is used for supplying the pencil to wear out and accepts the chamber. In actual operation, when each sensor is installed on the post processor, the wire harness of the sensor in the sensing assembly is contained in the containing cavity, and the detection end and the butt joint end of the sensor penetrate through the through hole to be located outside the protection box so as to be connected to corresponding positions on the post processor. At the moment, the wire harness of the sensing assembly is limited in the protection box, the wire harness can be protected from being damaged by high-temperature heat damage, rainwater, splashed silt and sand, the sensor can be protected, rainwater is prevented from entering the two ends of the sensor through the wire harness, signal detection is inaccurate, system failure is avoided, and reliability and accuracy of the sensor are guaranteed.

Description

Aftertreatment ware and vehicle

Technical Field

The application relates to the technical field of automobile post-processing, in particular to a post-processor and a vehicle.

Background

In order to ensure the complete and reliable operation of the vehicle post-processor, a plurality of sensors are usually added on the post-processor to acquire the operating state of each processing unit in the post-processor, and simultaneously, the signals detected by the sensors are completely and correctly transmitted to the vehicle and the engine control unit. When the traditional post processor is provided with sensors, the wire harnesses of the sensors are positioned outside the post processor, and the sensor wire harnesses exposed outside are easily damaged by high temperature, rainwater, splashing silt, sand, stone and the like to damage the sensors.

Disclosure of Invention

In view of the above, it is necessary to provide an aftertreatment device and a vehicle that improve the above-mentioned defects, in order to solve the problem in the prior art that the sensor in the aftertreatment device is easily damaged.

A post-processor comprises a body, a sensing assembly and a protection box detachably arranged outside the body; the protection box is provided with an accommodating cavity and a plurality of through holes for communicating the accommodating cavity with the outside of the protection box;

the accommodating cavity is used for accommodating the wiring harness of the sensor assembly, and the penetrating hole is used for enabling the wiring harness to penetrate out of the accommodating cavity.

In one embodiment, the protection box further has a winding portion, the winding portion is disposed in the accommodating cavity, and the winding portion is used for installing a wiring harness.

In one embodiment, the protection box includes a bottom case and a cover, the bottom case is detachably mounted on the body, the cover detachably covers the bottom case, the bottom case and the cover enclose the accommodating cavity, and the winding portion is disposed on the bottom case.

In one embodiment, the bottom shell is provided with a fixing frame protruding towards the cover body, one end of the fixing frame departing from the bottom shell is bent towards the accommodating cavity to form a first folding edge, and the first folding edge is detachably connected with the cover body.

In one embodiment, the edge of the bottom shell has a first flange protruding towards the outside of the protection box, and the first flange protrudes out of the through hole.

In one embodiment, the protection box further includes a clip, the clip is disposed on the first flange and/or the bottom shell in the receiving cavity, and the clip has a bayonet for guiding the wiring harness.

In one embodiment, the protection box further includes a fixing bracket located in the accommodating cavity, one end of the fixing bracket is fixedly connected to the bottom case, the other end of the fixing bracket extends toward the cover body and is bent to form a second folded edge, the fixing bracket and the bottom case form an accommodating area, and a connecting portion is arranged on the second folded edge.

In one embodiment, the accommodating area has an opening, the opening is arranged opposite to the part between the two ends of the fixing support, and the cover body is provided with a through window which is communicated with the inside and the outside of the protection box corresponding to the opening.

In one embodiment, the protection box further includes a mounting seat located in the receiving cavity, the mounting seat is fixedly connected to the bottom shell and has a mounting position facing the cover, and an edge of the mounting seat has a second flange protruding toward an edge of the protection box.

In one embodiment, the sensing assembly comprises a docking hub, a differential pressure sensor, a nitrogen oxygen sensor and at least one temperature sensor;

the pressure difference sensor is arranged in the accommodating cavity, and the butt joint end of the pressure difference sensor, the high-pressure air taking pipe and the low-pressure air taking pipe respectively penetrate through one penetrating hole and extend out of the protection box; the control box of the nitrogen oxygen sensor is arranged in the accommodating cavity, and a probe and a butt joint end of the nitrogen oxygen sensor respectively penetrate through one penetrating hole and extend out of the protection box; the temperature sensor part is positioned in the accommodating cavity, and the detection end and the butt joint end of the temperature sensor part respectively penetrate through one through hole and extend out of the protection box;

the butt joint ends of the differential pressure sensor, the nitrogen oxygen sensor and each temperature sensor are connected to the butt joint connector.

In one embodiment, the body comprises a support assembly, and a pretreatment unit, a post-treatment unit and a middle cavity which are arranged on the support assembly;

the pretreatment unit comprises a DOC module and a DPF module which are sequentially connected along a first direction; the post-treatment unit comprises a mixer, an SCR module and an ASC module which are sequentially connected along a second direction, the first direction is parallel to and opposite to the second direction, and the middle cavity is positioned on the front sides of the pre-treatment unit and the post-treatment unit in the first direction and is connected and communicated with the DPF module and the mixer;

the DOC module and the DPF module, the DPF module and the intermediate cavity, the intermediate cavity and the mixer and the SCR module are detachably connected through connecting assemblies;

the protective case is mounted to the bracket assembly, which is configured to the vehicle frame.

In one embodiment, the SCR module and the ASC module are integrally connected.

In one embodiment, the support assembly comprises a mounting frame and a connecting structure, the connecting structure connects the pre-processing unit and the post-processing unit, and the mounting frame is connected with the connecting structure;

the protection box is detachably mounted on the connecting structure, and the mounting frame is located on the rear side of the front treatment unit and the rear treatment unit in the first direction and is configured on the frame.

In one embodiment, the heat treatment device further comprises a side heat shield and an upper heat shield, wherein the side heat shield is arranged on one side, away from the pretreatment unit and the aftertreatment unit, of the middle cavity, and the upper heat shield is arranged on one side, away from the pretreatment unit, of the aftertreatment unit.

In addition, this application embodiment still provides a vehicle, includes frame and the aftertreatment ware as in any above-mentioned embodiment, the body is installed in the frame.

When the post processor is used for installing each sensor in the sensing assembly on the post processor in actual operation, the wiring harness of the sensor is contained in the containing cavity, and the detection end and the butt joint end of the sensor penetrate through the through hole to be located outside the protection box so as to be connected to corresponding positions on the post processor. At the moment, the wire harness of the sensing assembly is limited in the protection box, the wire harness can be protected from being damaged by high-temperature heat damage, rainwater, splashed silt and sand, the sensor can be protected, rainwater is prevented from entering the two ends of the sensor through the wire harness, signal detection is inaccurate, system failure is avoided, and reliability and accuracy of the sensor are guaranteed.

Drawings

FIG. 1 is a schematic diagram of a post-processor according to an embodiment of the present application;

FIG. 2 is a schematic diagram of a portion of the post-processor shown in FIG. 1;

FIG. 3 is an internal view of the structure shown in FIG. 2;

FIG. 4 is a schematic diagram of a portion of the post-processor shown in FIG. 1;

FIG. 5 is another aspect diagram of the structure shown in FIG. 4;

fig. 6 is a schematic diagram of a mixer in the post-processor shown in fig. 1.

Description of reference numerals:

a post-processor 10;

a body 100;

a DOC module 110; a DPF module 120; an intermediate chamber 130; a mixer 140; a nozzle 141; a housing 142; a connectivity window 1421; an air outlet 1422; a partition 143; a first cavity a; a second cavity b; a mixing tube 144; a first tube 1441; a second tube 1442; an air intake window c; fins 1443; a fine pore d; a baffle 1444; an SCR module 150; an ASC module 160; an intake pipe 170; an outlet pipe 180; a bracket assembly 190; a mounting frame 191; a connecting structure 192; a strap 1921; intermediate members 1922; a connector 1923; a side heat shield 101; an upper heat shield 102; a high-pressure gas intake pipe 104; a low pressure gas take-off pipe 105; first insulating supports 106; a second insulating support 107;

a protection case 200;

a bottom case 210; a cover 220; a window 221 is arranged in a penetrating way; a winding part 230; a through hole 240; a fixed frame 211; a first flange 212; a clamp 213; a fixed bracket 214; a mounting seat 216; a second turned-over edge 2161; a docking hub 250; a differential pressure sensor 260; a nitrogen oxide sensor 270; a temperature sensor 280.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Generally, a sensor has a detection end and a docking end connected by a wire harness, the detection end is used for detecting target parameter information (such as temperature, pressure, nitrogen oxide content and the like) of a detected object, and the docking end is used for feeding back the target parameter information transmitted by the wire harness to a control side (such as a vehicle controller and an engine controller) and the like. In addition, the doc (diesel Oxidation catalyst) module mentioned in the present application is an abbreviation of a diesel Oxidation Catalytic post-treatment module, the dpf (diesel Particulate filter) module is an abbreviation of a diesel Particulate filter module, the scr (selective Catalytic reduction) module is an abbreviation of a selective Catalytic reduction post-treatment module, and the asc (ammonia Slip catalyst) module is an abbreviation of an ammonia Oxidation Catalytic post-treatment module.

Referring to fig. 1 and 2, an embodiment of the present application provides an aftertreatment device 10 including a main body 100, a sensing element, and a protection box 200 detachably mounted on an exterior of the main body 100. The protection box 200 has a receiving cavity and a plurality of through holes 240 communicating the receiving cavity and the exterior of the protection box 200.

The accommodating cavity is used for accommodating at least a wiring harness of the sensing assembly, and the through hole 240 is used for allowing the wiring harness to penetrate out of the accommodating cavity.

In actual operation, when each sensor in the sensing assembly is mounted on the post-processor 10, the wiring harness of the sensor is accommodated in the accommodating cavity, and the detection end and the butt end of the sensor pass through the through hole 240 and are located outside the protection box 200 so as to be connected to corresponding positions on the post-processor 10. At this moment, the wire harness of the sensing assembly is limited in the protection box 200, can be protected by the protection box 200 from high-temperature heat damage, rainwater, splashed silt and sand, can protect the sensor, and can prevent rainwater from entering the two ends of the sensor through the wire harness to cause inaccurate signal detection and system failure, so that the reliability and accuracy of the sensor are ensured.

It should be noted that the housing cavity can house a wiring harness of the sensor, for example, when the sensor is the temperature sensor 280, the abutting end and the detecting end of the temperature sensor 280 are located outside the protection box 200 to be connected with the corresponding structures on the postprocessor 10, and the wiring harness located between the abutting end and the detecting end can be housed in the protection box 200. Of course, the housing chamber may house not only the wiring harness of the sensor but also the processing structure of the sensor. For example, when the sensor is a nitrogen oxygen sensor 270, the nitrogen oxygen sensor 270 also has a control box located between the docking end and the probing end.

In some embodiments, referring to fig. 3, the protection box 200 further has a wire winding portion 230, the wire winding portion 230 is disposed in the receiving cavity, and the wire winding portion 230 is used for installing and organizing the sensor harness. The wiring harness in the accommodating cavity is arranged under the action of the winding part 230, so that winding is avoided, and later maintenance is facilitated.

Further, referring to fig. 3, the winding portion 230 includes a plurality of clasps, each of which is fixedly connected to the protection box 200 and has a through hole for the wire harness to pass through. During actual operation, the routing of the wiring harness can be planned and arranged through the positions of the arranged clamping rings.

Preferably, the snap ring includes a fixing portion and a ring portion, the fixing portion is fixedly connected to the protection box 200, the ring portion has a via hole, and a gap communicating with the via hole, and the ring portion is rotatably connected to the fixing portion. The ring part is in the pivoted in-process, and the breach is kept away from or is close to the fixed part. When the breach is kept away from the fixed part, the pencil gets into the via hole through the breach, and when the breach was close to the fixed part, the fixed part closed breach. So, can rotate ring portion in order to open the breach and install the pencil when needs installation pencil, rotate ring portion and closed breach after the installation, prevent that the pencil from droing. Of course, the configuration of the winding portion 230 is not limited to the above.

In some embodiments, referring to fig. 3, the protection box 200 includes a bottom case 210 and a cover 220, the bottom case 210 is detachably mounted on the body 100, the cover 220 is detachably covered on the bottom case 210, the bottom case 210 and the cover 220 enclose to form an accommodation cavity, and the winding portion 230 is disposed on the bottom case 210. At this time, the protection box 200 is formed by the bottom case 210 and the cover 220, and when the sensor is mounted, the cover 220 can be detached from the bottom case 210, which facilitates the mounting of the sensor and the harness thereof.

Specifically, in the embodiment, the bottom casing 210 has a fixing frame 211 protruding toward the cover 220, and one end of the fixing frame 211 departing from the bottom casing 210 is bent toward the accommodating cavity to form a first folded edge, and the first folded edge is detachably connected to the cover 220. At this time, the bottom case 210 is connected to the cover 220 through the first folding edge, and the first folding edge has a mounting surface, so that the cover is easy to operate in the connection process, and the connection between the bottom case 210 and the cover 220 is more stable. Meanwhile, the first folding edge is positioned in the accommodating cavity and is not exposed, so that the structure of the protection box 200 is more attractive. In addition, a space is formed between the protruded fixing frame 211 and the accommodating cavity, so that the accommodating cavity has enough space for accommodating the wiring harness. Alternatively, the first flange is threadedly coupled to the cover 220. Further, the fixing frame 211 is convexly disposed at the edge of the bottom case 210, and the fixing frame 211 does not occupy the space of the accommodating cavity, so that the space of the accommodating cavity is more sufficient, the fixing frame 211 does not interfere with the wiring harness, and the wiring harness is more convenient to route.

In a specific embodiment, referring to fig. 3, the edge of the bottom case 210 has a first flange 212 protruding toward the outside of the protection box 200, and the first flange 212 protrudes through the through hole 240. In actual operation, when the wire harness extends out of the through hole 240 from the installation cavity, the first flanging 212 plays a certain supporting role for the wire harness, and the abrasion of the wire harness and the hole opening of the through hole 240 can be avoided. It is to be understood that first cuff 212 is disposed in correspondence with one of the through-holes 240.

Further, referring to fig. 3, the protection box 200 further includes a clip 213, the clip 213 is disposed on the first flange 212 and/or the bottom shell 210 of the receiving cavity, and the clip 213 has a slot for guiding the wiring of the wire harness. In practice, the clip 213 may be disposed on the bottom case 210 in the receiving cavity to serve as a winding structure for guiding the wire bundle, and the wire bundle is inserted into the notch. A collar 213 may also be provided on the first flange 212, and the wiring harness may be routed along the collar 213 after the wiring harness has passed through the aperture, thereby directing the wiring harness to run outside the protective case 200.

In some embodiments, referring to fig. 3, the protection box 200 further includes a fixing bracket 214 located in the receiving cavity, one end of the fixing bracket 214 is fixedly connected to the bottom case 210, the other end of the fixing bracket 214 extends toward the cover 220 and is bent to form a second folded edge, the fixing bracket 214 and the bottom case 210 form a receiving area, and the second folded edge is provided with a connecting portion.

In practice, the differential pressure sensor 260 may be mounted by the fixing bracket 214, specifically, the differential pressure sensor 260 is placed in the receiving area, and the differential pressure sensor 260 and the second flange are coupled by a fastener. Because the differential pressure sensor 260 is installed in a suspension manner, the high-pressure air suction port and the low-pressure air suction port of the differential pressure sensor 260 are conveniently connected with the high-pressure air intake pipe 104 and the low-pressure air intake pipe 105 respectively.

Further, one end of the fixing bracket 214 connected to the bottom case 210 is bent to form a third folded edge, the extending direction of the third folded edge is opposite to that of the second folded edge, and the third folded edge is fixedly connected to the bottom case 210. At this time, the third folded edge is in surface contact with the bottom shell 210, so that the fastener is convenient to mount, and the connection reliability is better.

Further, referring to fig. 2 and 3, the receiving area has an opening, the opening is disposed opposite to a portion between two ends of the fixing bracket 214, and the cover 220 is provided with a through window 221 communicating the inside and the outside of the protection case 200 corresponding to the opening. In actual operation, the high-pressure air suction port and the low-pressure air suction port of the press-fitting sensor are located on the same side, when the press-fitting sensor is installed, one side of the press-fitting sensor with the high-pressure air suction port and the low-pressure air suction port is arranged corresponding to the opening, the cover body 220 is provided with a through window 221 corresponding to the opening, and the high-pressure air taking pipe 104 and the low-pressure air taking pipe 105 are connected with the high-pressure air suction port and the low-pressure air suction port respectively after passing through the through window 221. Thus, the through-hole window 221 is provided to facilitate installation of the high pressure intake pipe 104 and the low pressure intake pipe 105.

In some embodiments, referring to fig. 3, the protection box 200 further includes a mounting seat 216 located in the receiving cavity, the mounting seat 216 is fixedly connected to the bottom case 210 and has a mounting position facing the cover 220, and an edge of the mounting seat 216 has a second flange 2161 protruding toward an edge of the protection box 200. In actual operation, the control box of the nox sensor 270 is installed in the installation site, and the control box has two connection terminals, wherein one of the connection terminals is connected to the probe of the nox sensor 270 through a wire harness, and the other connection terminal is connected to the docking terminal of the nox sensor 270 through a wire harness (for connecting to the vehicle controller or the engine controller). The harness connecting the two terminals is supported by the second turn-up 2161 so as to be prevented from being worn by the mounting base 216.

It should be noted that the post-processor 10 further includes a sensing component, and the sensing component is at least partially accommodated in the accommodating cavity.

In some embodiments, referring to fig. 3 and 4, the sensing assembly includes a docking hub 250, a differential pressure sensor 260, a nitrogen oxide sensor 270, and at least one temperature sensor 280. The differential pressure sensor 260 is arranged in the accommodating cavity, and the butt joint end of the differential pressure sensor 260, the high-pressure air extracting pipe 104 and the low-pressure air extracting pipe 105 respectively pass through one through hole 240 and extend out of the protection box 200; the control box of the nox sensor 270 is disposed in the containing cavity, and the probe and the butt end of the nox sensor 270 respectively pass through one through hole 240 and extend to the outside of the protection box 200. The temperature sensor 280 is partially located in the receiving cavity, and the detecting end and the butt end thereof respectively pass through one through hole 240 and extend to the outside of the protection box 200. The docking ends of differential pressure sensor 260, nitrogen oxygen sensor 270, and each temperature sensor 280 are connected to docking hub 250. At this time, various sensors required for the post-processor 10 are integrated into the protection box 200 of the post-processor 10, and the protection box 200 is used as a standard component of the post-processor 10, thereby realizing modularization of the sensing assembly. Meanwhile, the butt joint ends of the sensors are integrally connected to a butt joint connector 250, and the butt joint connector 250 is used for signal transmission with a vehicle controller or an engine controller, so that the installation steps are reduced, and the overall layout is simplified.

In some embodiments, referring to fig. 1 and 4, the body 100 of the post-processor 10 includes a rack assembly 190 and the pre-processing unit, the post-processing unit, and the intermediate chamber 130 are disposed on the rack assembly 190. The pretreatment unit comprises a DOC module 110 and a DPF module 120 which are sequentially connected along a first direction; the post-treatment unit includes a mixer 140, an SCR module 150, and an ASC module 160 sequentially connected in a second direction, the first direction being parallel and opposite to the second direction, and an intermediate chamber 130 located at a front side of the pre-treatment unit and the post-treatment unit in the first direction and connecting and communicating the DPF module 120 and the mixer 140. The DOC module 110 and the DPF module 120, the DPF module 120 and the middle chamber 130, the middle chamber 130 and the mixer 140, and the mixer 140 and the SCR module 150 are detachably connected by connection assemblies. The protection box 200 is attached to the bracket assembly 190, and the bracket assembly 190 is disposed on the vehicle frame.

In this case, the post-processor 10 having a U-shape is configured by the pre-processing unit, the post-processing unit, and the intermediate chamber 130, so that the space occupied by the post-processor 10 on the vehicle is more reasonable. In addition, the aftertreatment device 10 integrates the DOC module 110, the DPF module 120, the mixer 140, the SCR module 150, and the ASC module 160, which has a good exhaust gas treatment effect and is more environmentally friendly.

Further, the post-processing includes the temperature sensor 280, the differential pressure sensor 260, and the nitrogen oxide sensor 270 in the above-described embodiments. The temperature sensors 280 include four temperature sensors, one of the temperature sensors 280 is used for detecting the temperature of the downstream side of the ACR module in the aftertreatment 10, one of the temperature sensors 280 is used for detecting the temperature of the upstream side of the DOC module 110 in the aftertreatment 10, one of the temperature sensors 280 is used for detecting the temperature of the upstream side of the SCR module 150 in the aftertreatment 10, and one of the temperature sensors 280 is used for detecting the temperature of the upstream side of the DPF module 120. The differential pressure sensor 260 includes one, and the low pressure intake pipe 105 of the differential pressure sensor 260 communicates with the intermediate chamber 130, and the high pressure intake pipe 104 of the differential pressure sensor 260 communicates with the upstream side region of the DPF module 120. The probe of the nitrogen oxygen sensor 270 is connected to the downstream side of the ACR module, and specifically, is disposed on the outlet pipe 180 connected to the downstream side of the ACR module.

As can be appreciated, referring to fig. 1 and 4, the body 100 further includes an inlet pipe 170 and an outlet pipe 180, the inlet pipe 170 being connected to an upstream side of the DOC module 110, and the outlet pipe 180 being connected to a downstream side of the ACR module.

Preferably, the SCR module 150 and the ASC module 160 are integrally connected. At this time, the SCR module 150 and the ASC module 160 are integrated into one module, which is convenient for installation. In practice, the two may be integrated by coating or immersing the ammonia oxidation catalyst on the honeycomb inner walls at the downstream end of the SCR.

The mixer 140 is a mixing structure integrated with a urea nozzle 141. In a preferred embodiment, referring to fig. 6, the mixer 140 includes a housing 142 and a nozzle 141 extending in the second direction, one end of the housing 142 has a communication window 1421 connected to the intermediate chamber 130, the other end of the housing 142 has a plurality of air outlet holes 1422 communicating with the SCR module 150, a cavity, a partition 143 and a mixing pipe 144 are formed inside the housing 142, the partition 143 partitions the cavity into a first cavity a and a second cavity b, the communication window 1421 communicates with the first cavity a, the mixing pipe 144 penetrates the partition 143 and has a first pipe body 1441 in the first cavity a and a second pipe body 1442 in the second pipe body 1442, which communicate with each other, the first pipe body 1441 has a plurality of air inlet windows c arranged around the axial direction thereof, and the second pipe body 1442 has a plurality of fine holes d, and the fine holes d are uniformly distributed in the second pipe body 1442. The nozzle 141 is disposed on the housing 142 and is in communication with the first tube 1441. During actual operation, urea enters the first pipe 1441 from the nozzle 141, gas to be treated enters the first pipe 1441 through the middle cavity 130, the communication window 1421 and the first cavity a to be mixed with urea, the gas to be treated continuously mixes with urea in the process of entering the second pipe 1442, uniformly flows out of the second pipe 1442 and then the second cavity b under the action of the fine holes d in the second pipe 1442, and then the gas outlet 1422 flows to the SCR module 150. Preferably, the first tube 1441 is provided with blades turned inside or outside at the air inlet window c, and the fins 1443 form an acute angle with the circumference of the first tube 1441 where the air inlet window c is located. The blades can form a rotational flow when the gas enters the first pipe 1441, so that the mixing with the urea is accelerated.

Preferably, a baffle 1444 is further provided in the second cavity b, the baffle 1444 is located below the second pipe 1442, and the large baffle 1444 extends from one end of the housing 142 to the other end for guiding the mixed air flowing out of the second pipe 1442. The baffle 1444 may be an arc-shaped baffle, a semicircular baffle, a straight plate, or the like.

In a specific embodiment, the connecting assembly comprises a clamping piece, a convex flange, a sealing gasket and a concave flange which are sequentially connected along a first direction. The sealing gasket is in interference fit with the outer wall of the spigot of the convex flange, the sealing gasket is sealed with the inner wall surface of the step of the concave flange, and finally the clamping piece simultaneously clamps the outer peripheral walls of the concave flange and the convex flange and applies pressing force for tightly connecting the concave flange and the convex flange.

In some embodiments, referring to fig. 5, the rack assembly 190 includes a mounting bracket 191 and a connecting structure 192, the connecting structure 192 connecting the pre-processing unit and the post-processing unit, the mounting bracket 191 connecting the connecting structure 192. The protective box 200 is detachably attached to the connection structure 192, and the mounting frame 191 is located at the rear side of the front and rear treatment units in the first direction and is disposed at the vehicle frame.

In actual operation, the pre-processing unit and the post-processing unit are fixed by the connecting structure 192, then the connecting structure 192 is connected by the mounting frame 191, and finally the mounting frame 191 is mounted on the frame, so that the post-processor 10 is mounted.

In a specific embodiment, the connecting structure 192 includes at least one pair of intermediate plates, a binding band 1921 and a connecting member 1923, the intermediate plates are located between the pre-processing unit and the post-processing unit, two intermediate plates of each pair of intermediate plates are symmetrically arranged along a first plane where the first direction and the second direction are located, two ends of each intermediate plate in a third direction that is located in the first plane and perpendicular to the first direction are respectively formed with a supporting surface adapted to the shapes of the pre-processing unit and the post-processing unit, one end of each pair of connecting frames in the third direction is encircled around the pre-processing unit by a binding band 1921, the other end is encircled around the post-processing unit by a binding band 1921, and two ends of each binding band 1921 are respectively and fixedly connected to the same end of each pair of intermediate plates. Each intermediate member 1922 is provided with a through-hole formed in a first direction, and the connecting member 1923 is coupled to the mounting bracket 191 through the through-hole. In practice, after the front treatment unit, the intermediate chamber 130 and the rear treatment unit are assembled into a U-shape, each pair of intermediate plates are mounted in place, then the intermediate plates, the front treatment unit and the rear treatment unit are fixed by straps 1921, and finally the connectors 1923 and the mounting brackets 191 are connected. The connectors 1923 may be tubes, rods, etc.

In some embodiments, referring to fig. 1, the aftertreatment device 10 further includes a side heat shield 101 and an upper heat shield 102102, the side heat shield 101 being disposed on a side of the intermediate chamber 130 facing away from the pretreatment unit and the aftertreatment unit, the upper heat shield 102102 being mounted on a side of the aftertreatment unit facing away from the pretreatment unit. This makes it possible to protect the pretreatment unit, the post-treatment unit, the sensor unit, and the like in the post-processor 10 from heat. Specifically, a first heat insulation support 106 is arranged on the middle cavity 130, a second heat insulation support 107 is arranged on the post-processing unit, the side heat insulation cover 101 is mounted on the first heat insulation support 106, and the upper heat insulation cover 102102 is mounted on the second heat insulation support 107.

In addition, an embodiment of the present application further provides a vehicle, which includes a frame and the aftertreatment device 10 in any of the above embodiments, wherein the body 100 is mounted on the frame. Since the vehicle includes the post-processor 10, all the advantages mentioned above are not repeated here.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. An aftertreatment device, comprising a body (100), a sensing assembly and a protective box (200) detachably mounted on the outside of the body (100); the protection box (200) is provided with an accommodating cavity and a plurality of through holes (240) which are communicated with the accommodating cavity and the outside of the protection box (200);

2. The post processor as claimed in claim 1, wherein the protection box (200) further has a wire winding portion (230), the wire winding portion (230) is provided in the receiving cavity, and the wire winding portion (230) is used for installing a wire harness.

3. The post-processor according to claim 2, wherein the protection box (200) comprises a bottom case (210) and a cover (220), the bottom case (210) is detachably mounted on the main body (100), the cover (220) is detachably mounted on the bottom case (210), the bottom case (210) and the cover (220) enclose the receiving cavity, and the winding portion (230) is disposed on the bottom case (210).

4. The post-processor according to claim 3, wherein the bottom shell (210) is provided with a fixing frame (211) protruding towards the cover (220), one end of the fixing frame (211) departing from the bottom shell (210) is bent towards the receiving cavity to form a first folding edge, and the first folding edge is detachably connected with the cover (220).

5. The post-processor according to claim 3, characterized in that the edge of the bottom shell (210) has a first flanging (212) projecting towards the outside of the protective box (200), the first flanging (212) projecting out of the through hole (240).

6. The post processor of claim 5, wherein the protective case (200) further comprises a clip (213), the clip (213) is disposed on the first flange (212) and/or the bottom shell (210) in the receiving cavity, and the clip (213) has a bayonet for guiding the wiring of the wire bundle.

7. The post-processor according to claim 3, wherein the protection box (200) further comprises a fixing bracket (214) located in the receiving cavity, one end of the fixing bracket (214) is fixedly connected to the bottom shell (210), the other end of the fixing bracket (214) extends towards the cover (220) and is bent to form a second folded edge, the fixing bracket (214) and the bottom shell (210) form a receiving area, and a connecting portion is arranged on the second folded edge.

8. The post-processor according to claim 7, characterized in that the receiving area has an opening, the opening is arranged opposite to the portion between the two ends of the fixing support (214), and the cover (220) is provided with a through window (221) communicating the inside and the outside of the protection box (200) corresponding to the opening.

9. The post processor as claimed in claim 3, wherein the protection box (200) further comprises a mounting seat (216) located in the receiving cavity, the mounting seat (216) is fixedly connected to the bottom shell (210) and has a mounting position facing the cover (220), and an edge of the mounting seat (216) has a second flange (2161) protruding towards an edge of the protection box (200).

10. The aftertreatment of claim 1, wherein the sensing assembly includes a docking hub (250), a differential pressure sensor (260), a nitrogen oxide sensor (270), and at least one temperature sensor (280);

the differential pressure sensor (260) is arranged in the accommodating cavity, and the butt joint end of the differential pressure sensor (260), the high-pressure air taking pipe and the low-pressure air taking pipe respectively penetrate through one through hole (240) and extend out of the protection box (200); the control box of the nitrogen-oxygen sensor (270) is arranged in the accommodating cavity, and a probe head and a butt joint end of the nitrogen-oxygen sensor (270) respectively penetrate through one through hole (240) and extend out of the protection box (200); the temperature sensor (280) is partially positioned in the accommodating cavity, and the detection end and the butt joint end of the temperature sensor respectively pass through one through hole (240) and extend out of the protection box (200);

the docking ends of the differential pressure sensor (260), the nitrogen oxygen sensor (270), and each of the temperature sensors (280) are connected to the docking hub (250).

11. The post-processor of claim 1, wherein the body (100) comprises a rack assembly (190) and a pre-processing unit, a post-processing unit and an intermediate chamber (130) provided on the rack assembly (190);

the pretreatment unit comprises a DOC module (110) and a DPF module (120) which are sequentially connected along a first direction; the post-treatment unit comprises a mixer (140), an SCR module (150) and an ASC module (160) which are connected in sequence along a second direction, the first direction is parallel to and opposite to the second direction, the middle cavity (130) is positioned at the front side of the pre-treatment unit and the post-treatment unit in the first direction and is connected and communicated with the DPF module (120) and the mixer (140);

the DOC module (110) and the DPF module (120), the DPF module (120) and the intermediate chamber (130), the intermediate chamber (130) and the mixer (140), and the mixer (140) and the SCR module (150) are detachably connected through connection assemblies;

the protective case (200) is attached to the bracket assembly (190), and the bracket assembly (190) is disposed on a vehicle frame.

12. The aftertreatment of claim 11, wherein the SCR module (150) and the ASC module (160) are integrally connected.

13. The aftertreatment of claim 12, wherein the bracket assembly (190) includes a mounting bracket (191) and a connecting structure (192), the connecting structure (192) connecting the pretreatment unit and the aftertreatment unit, the mounting bracket (191) connecting the connecting structure (192);

the protective box (200) is detachably attached to the attachment structure (192), and the mounting bracket (191) is located on the rear side of the pretreatment unit and the post-treatment unit in the first direction and is disposed on the vehicle frame.

14. The aftertreatment device of claim 11, further comprising a side heat shield (101) and an upper heat shield (102), the side heat shield (101) being disposed on a side of the intermediate chamber (130) facing away from the pretreatment unit and the aftertreatment unit, the upper heat shield (102) being mounted on a side of the aftertreatment unit facing away from the pretreatment unit.

15. A vehicle comprising a frame to which the body (100) is mounted and an aftertreatment device (10) according to any one of claims 1 to 14.