KR20230068798A - A combine - Google Patents

Abstract

Disclosed is a combine that prevents the malfunction or failure of a sensor controller due to exposure to vibration and high-temperature environments and improves the maintainability of the sensor controllers. The combine according to the present invention, in a structure in which a post-processing device is disposed in a first space between a threshing unit and a grain tank unit, comprises: a case unit covering the post-processing device in the first space; a component mounting box installed in a recessed form toward the inside of the case unit at an opening in the front center of the case unit facing the grain tank unit; a component mounting plate disposed on a first vertical plane side of the component mounting box at a predetermined distance from the first vertical plane; and a mounting base for supporting the component mounting box to be located in the opening. The sensor controllers are mounted on a first side of the component mounting plate facing the grain tank unit. A mounting base is located inside the case unit at the rear of the component mounting box on the other side of the first side.

Description

combine {A combine}

The present invention relates to a combine, and more particularly, to a combine equipped with an exhaust gas post-processing device for reducing pollutants in exhaust gas.

Combines generally adopt diesel engines due to the nature of work requiring strong power. However, as is well known, diesel engines have the problem of emitting more harmful gases and pollutants than engines using other fuels. Therefore, as exhaust gas regulations are becoming increasingly strict, attempts are being made at combines to satisfy the regulations. .

One of the attempts to reduce the pollution level of the exhaust gas of the combine is the installation of a post-processing device for purifying exhaust gas. The objects to be purified in the exhaust gas are mainly nitrogen oxides (NOx) and particulate matter (hereinafter referred to as 'PM'). Post-processing devices are generally applied.

However, in the case of a combine, unlike other agricultural vehicles, it is a configuration in which several mechanical elements such as a harvesting device, a threshing device, a sorting device, and a grain tank are integrated into one mechanical device, Its structure is very complex, and therefore there is no choice but to have a large space limitation in attaching the exhaust gas aftertreatment device.

Accordingly, a technique for effectively utilizing the limited space of the combine to additionally mount a post-processing device without a separate design change has been known (see Prior Patent Document 1 below). This is a technology that utilizes the free space between the threshing unit and the grain tank of an existing combine, and is characterized in that a post-processing device is configured in a form that can be placed in the free space and installed in the free space.

However, in most of the prior art in which the post-processing device is disposed between the threshing unit and the grain tank unit, including Prior Patent Document 1, it is possible to safely mount various sensor (temperature, differential pressure, Knox sensor, etc.) controllers, which are essential components of the post-processing system. There is a problem in that controllers are exposed to high temperatures and vibration environments and cause malfunctions or breakdowns.

In addition, simply arranging various sensor controllers around the measurement target according to the location of the measurement target (temperature measurement target, differential pressure measurement target, Knox measurement target, etc.) causes the sensor controllers to be distributed and placed here and there. There is a problem in that efficiency and maintenance of sensor controllers are greatly reduced.

Korean Patent Publication No. 10-2015-0111174 (published on October 5, 2015)

The problem to be solved by the present invention is to safely protect the sensor controllers from vibration and high temperature environments to prevent malfunction or failure, and to provide a combine with improved maintainability for the sensor controllers.

As a means for solving the problems, the present invention is a combine in which a post-processing device is disposed in the first space between the threshing unit and the grain tank unit,

a casing covering the post-processing device in the first space;

a component mounting box installed in an opening in the center of the front face of the case unit facing the grain tank unit in a recessed form toward the inside of the case unit;

a component mounting plate spaced apart from the first vertical plane at a distance from the first vertical plane of the component mounting box; and

It includes; a mount for supporting the component mounting box to be located in the opening,

Sensor controllers are mounted on the first surface of the component mounting plate facing the grain tank unit,

It provides a combine, characterized in that the mounting stand is located inside the case portion behind the component mounting box opposite to the first surface.

Here, the post-processing device includes a Diesel Oxidation Catalyst (DOC) and a Selective Catalytic Reduction (SCR), and the DOC may be disposed relatively upward in the first space, and the SCR may be disposed below the DOC. .

In addition, the upper surface of the case portion may be configured to be inclined downward in a direction facing the grain tank portion, and the lower plate portion of the component mounting box may be configured to be downwardly inclined in the same direction as the upper surface portion of the case portion.

The case unit may be composed of a front case having the opening and a rear case defining an accommodation space for accommodating the post-processing device therein together with the front case, and the front case and the rear case are attached to the fuselage frame. It may be configured to partition the accommodation space by being fixed to one side and the other side of the mounting table to be mounted, respectively.

In addition, the upper part of the component mounting box is fixed to the top of the mounting table with two or more first fixing bolts, the lower part is fixed to the middle of the mounting table with two or more second fixing bolts, and the component mounting plate is fixed to the first vertical surface. It may be fixed to the mounting base by two or more through bolts passing through.

At this time, an oscillation bolt integrally equipped with anti-vibration rubber is interposed between the mounting table and each through bolt, and the anti-vibration bolt is installed in the fastening hole of the fixing bracket configured in the mounting table to move from the mounting table to the component mounting plate. It may be configured to absorb transmitted vibration in the middle.

In addition, the sensor controller applied to the present invention includes a differential pressure sensor controller for controlling a differential pressure sensor for detecting exhaust gas pressures in the front and rear of the catalyst filter in the SCR constituting the post-processing device, and the front end of the SCR and a NOx sensor controller for controlling a NOx sensor for detecting a mass flow rate of nitrogen oxides in exhaust gas passing through an exhaust pipe connected to the rear end.

In addition, the component mounting plate may be made of a metal or non-metal material having a low heat transfer rate.

According to the combine according to an embodiment of the present invention, a dedicated mounting box for mounting the sensor controller is configured between the threshing unit and the grain tank unit, and a dedicated mounting plate is configured in a form capable of vibration isolation to mount the sensor controllers By forming the configuration, the sensor controllers are safely protected from vibration and high-temperature environments, and malfunction or failure can be prevented.

In addition, unlike the conventional configuration in which sensor controllers are distributed and arranged here and there, a dedicated mounting box is placed to form a configuration in which various sensor controllers (temperature, differential pressure, Knox sensor, etc.), which are essential components of the post-processing system, are mounted, so that the sensor controller The management of the fields can be performed efficiently, and the maintainability can also be greatly improved.

1 is a right side view of a combine according to an embodiment of the present invention.
Figure 2 is a left side view of the combine according to an embodiment of the present invention.
3 is a plan view of a combine according to an embodiment of the present invention.
Figure 4 is a schematic diagram of a threshing unit applied to a combine according to an embodiment of the present invention.
Figure 5 is a schematic view of the driving body of the combine viewed from the rear to show the arrangement structure of the post-processing device.
Figure 6 is a schematic view of the case portion shown in Figure 5 as viewed from the direction of the grain tank portion.
Figure 7 is a perspective view of the case portion shown in Figure 6;
8 is an exploded view of a case part;
9 is a view in which the case part is omitted to show the configuration of a post-processing device installed in a component mounting box and an inner space of the case part.
10 is an enlarged view of a main part of the present invention showing an enlarged component mounting box.
11 is an exploded perspective view showing a mounting base, a component mounting box, and a component mounting plate separated from each other;
FIG. 12 is a cross-sectional view of FIG. 9 viewed along the line AA.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In describing the present invention, detailed descriptions of well-known configurations will be omitted, and detailed descriptions of configurations that may unnecessarily obscure the subject matter of the present invention will be omitted.

1 and 2 are side views of a combine according to an embodiment of the present invention viewed from the right and left sides, respectively, and FIG. 3 is a plan view of the combine shown in FIGS. 1 and 2 as viewed from above. With reference to these drawings, the overall configuration of a combine according to an embodiment of the present invention will be first schematically reviewed.

The combine according to the embodiment of the present invention shown in FIGS. 1 to 3 is largely composed of a traveling body (1) and a harvesting unit (3) in front of the traveling body (1). The traveling body 1 has a caterpillar driving wheel 2, and the harvesting unit 3 is installed at the front end of the traveling body 1 at a downward slope toward the front of the traveling body 1 through the harvesting frame 32. It is connected so that it can be moved up and down.

The reaping unit 3 is provided with two sets of bariquant type reapers with opposite operating directions, and the crops cut by the reaping unit are supplied by a conveying means (symbol omitted) constituting the reaping unit 3. It is safely conveyed by the chain 4 and moved to the threshing part 5 on one side of the traveling machine 1 by the supply chain 4.

While passing through the threshing unit 5, threshing of the crop ears and at the same time, sorting work to filter out the pits and straws included with the grains of the threshing-treated crops is performed, and the grains finally selected through the sorting work are It is transported to the grain tank part 9 inside the other side of the machine, temporarily stored, and discharged out of the traveling machine 1 through an auger 6.

Operations related to the raising and lowering of the reaping unit 3 and the operation of the aircraft are performed through several lever operations of the aircraft manipulation unit 7 provided on the other side of the traveling aircraft 1, and the aircraft manipulation unit 7, that is, the lower driver's seat and the grain tank unit ( 9) An engine 10 generating output for driving various devices provided in the combine and driving the aircraft is substantially disposed in the extra space between them.

The gas control unit 7 may be a structure exposed to the outside (Non cabin type) or a configuration protected by a cabin (Cabin type) as shown in the drawing, and between the grain tank unit 9 and the gas control unit 7, the engine room ( sign omitted) is formed. In addition, the engine 10 is mounted in the engine room, and an openable dustproof cover assembly 11 between the airframe control unit 7 and the grain tank unit 9 covers the engine room from the side.

The dustproof cover assembly 11 is a modularized configuration of a rotary screen for filtering foreign substances introduced with the outside air, circulating water for engine cooling, oil for driving various hydraulic devices, and a cooling unit (not shown) for intake cooling. A cooling fan (not shown) for cooling the engine 10 is positioned between the engine 10 and the dustproof cover assembly 11 .

Figure 4 is a schematic diagram schematically showing a threshing unit of a combine for threshing and sorting of crops provided from the harvesting unit.

Referring to FIG. 4, the threshing unit 5 includes a threshing tub 50 and a water net 54 disposed below the threshing tub 50. On the circumferential surface of the threshing tub 50, feeding teeth 52 for scraping grains attached to the crop ears are attached in a regular arrangement, and the water net 54 is spaced apart from the threshing tub at a predetermined distance to cover the lower area of the threshing tub. arranged in an enclosing form.

The threshing tub 50 is rotated by engine power, and threshing by the impact action according to the rotation of the threshing tub 50, the sweeping action by the rapid teeth, and the frictional action between the threshing tub 50 and the water net 54. Threshing is performed on the crops conveyed to the unit 5, and the grains threshed through this threshing process pass through the water net 54 and fall to the sorting unit 8 below it.

The sorting unit 8 includes an shaking sorting unit 80 for shaking and sorting grains threshed through the threshing part 5 and a sorting wind generator 85 that generates wind for weight sorting. The rocking separator 80 is rocked back and forth, left and right in the form of a key, which is a tool used when filtering chaff or tickles, and the sorting wind generator 85 is sorted toward the rocking separator 80 provides wind for

For more precise sorting across multiple stages, the shaking separator 80 consists of a feed pan 82, a chaff sieve 83 continuous to the rear of the feed pan, and a sieve case 81 surrounding them. In this case, the feed pan 82 has a configuration in which wedge-shaped uneven pieces inclined with respect to the grain propagation direction are formed at regular intervals, and the chaff sieve 83 includes a plurality of chaff pins (symbols omitted).

Among the grains passing through the chaff sieve 83, the grains having a relatively heavy specific gravity fall to the side of the first transfer screw 87 at the rear of the sorting wind generator 85, and through this to the grain tank part 9 inside the other side of the machine. Among the grains that have passed through the chaff sieve 83, relatively light grains and gum balls are blown toward the second conveying screw 89 under the influence of the wind generated by the sorting wind generator 85.

The objects to be sorted (grains, gum, etc.) sent to the second transfer screw 89 are conveyed back to the feed pan 82 through the second transfer screw 89, and gums such as filth or straw filtered during the checkweighing process. The etc. are sucked into the exhaust fan 86 disposed at the rear of the threshing unit 5 and then discharged to the outside of the gas through an outlet formed at the rear of the gas.

5 is a schematic view of the combine driving body viewed from the rear to show the arrangement structure of the post-processing device, and FIG. 6 is a schematic view of the case portion shown in FIG. 5 as viewed from the direction of the grain tank portion, showing the grain tank portion and the threshing portion. It is a drawing omitting the . And Figure 7 is a perspective view of the case portion shown in Figure 6.

5 to 7, between the threshing unit 5 and the grain tank unit 9, a predetermined space (hereinafter referred to as 'first space') due to the separation of the threshing unit 5 and the grain tank unit 9 (S1)') is partitioned. A post-processing device 16 is disposed in the first space S1. Here, the post-processing device 16 functions to purify harmful gases and pollutants included in exhaust gas discharged from the engine after combustion.

The case part 30 covers and protects the post-processing device 16 disposed in the first space S1. An opening 34 having a predetermined size is formed in the center of the front surface of the case unit 30 facing the grain tank unit 9 (the surface facing the grain tank unit), and the opening 34 has a portion of the case unit 30. The component mounting box 40 is installed in the form of being recessed inward. A component mounting plate 50 for mounting the sensor controllers 62 and 64 is disposed in the component mounting box 40 .

The case part 30 is configured so that the upper surface part 33 is inclined downward in a direction facing the grain tank part 9 so that a large amount of dust generated and scattered during grain harvesting can be discharged downward without being accumulated. . In addition, the lower plate 42 of the component mounting box 40 is also configured to be inclined downward in the same direction as the upper surface of the case 30, thereby preventing stacking such as loss of money.

FIG. 8 is an exploded view of the case part, and FIG. 9 is a view in which the case part is omitted to show the configuration of a post-processing device installed in a component mounting box and an inner space of the case part.

Referring to FIGS. 8 and 9 , the case portion 30 may be divided into two parts, a front case 32 and a rear case 36 in the left and right width directions of the traveling body. The opening 34 is formed in the front case 32 with a size corresponding to the component mounting box 40, and the rear case 36 together with the front case 32 has the post-processing device 16 therein. ) It is configured to partition the receiving space for accommodation.

The front case 32 and the rear case 36 are fixed to one side and the other side of the mounting table 20, respectively, in the form of covering the mounting table 20 installed on the fuselage frame 14 to partition the accommodation space. . In addition, since the component mounting box 40 is fixed to one side of the mounting table 20 to which the front case 32 is fixed, the mounting table 20 has the component mounting box 40 positioned at the opening 34. play a supporting role in doing so.

The post-treatment device 16 may be composed of a Diesel Oxidation Catalyst (DOC) and a Selective Catalytic Reduction (SCR) device. Here, the DOC (17) raises the temperature of nitrogen oxides (NOx) to adsorb and remove them, and the SCR (19) reacts ammonia hydrolyzed with nitrogen oxides (NOx) using urea as a catalyst as a catalyst to produce nitrogen that is harmless to the environment. convert

The DOC 17 may have a configuration in which SOF (Soluble Organic Fraction) components are oxidized by filling a honeycomb carrier with a metal catalyst, such as platinum (Pt). The DOC 17 may be composed of a cell structure having a plurality of through-holes having a polygonal cross section and an outer wall surrounding the cell structure, and is disposed prior to the SCR 19 based on the exhaust gas flow direction.

The SCR (19) has its inlet side connected to the outlet of the DOC (17) through an outlet pipe (152) extending from the exhaust gas discharge side of the DOC (17), so that the exhaust gas is primary through the DOC (17). After the purification process, it flows into the SCR (19) and undergoes a secondary purification process, and the final purification process exhaust gas is discharged to the atmosphere through the tail pipe 155 connected to the exhaust gas discharge side of the SCR (19).

In this way, when the post-processing device 16 composed of the DOC 17 and the SCR 19 is disposed in the first space S1, the DOC 17 is disposed relatively upward as shown in FIG. 9 and FIG. , the SCR 19 may be disposed below the DOC 17. At this time, the DOC (17) is firmly fixed on the top of the mounting table (20) through a separate dedicated bracket (sign omitted), and the SCR (19) is installed on the inside of the mounting table (20) with another dedicated bracket or an SCR fixing clamp ( 28, see FIG. 11), it can be firmly fixed.

In FIG. 9 , reference numeral 150 denotes an inlet pipe that connects an engine exhaust side and an exhaust gas inlet side of the DOC 17 so that exhaust gas can flow.

FIG. 10 is an enlarged view of a main part of the present invention showing an enlarged component mounting box, and FIG. 11 is a perspective view showing a mounting stand, a component mounting box, and a component mounting plate separated. 12 is a cross-sectional view of FIG. 9 viewed along line A-A.

Referring to FIGS. 10 to 12 , the component mounting plate 50 is disposed on the side of the first vertical surface 41 of the component mounting box 40 at a distance from the first vertical surface 41 . At this time, the sensor controllers 62 and 64 are mounted on the first surface (52, the surface facing the grain tank) of the component mounting plate 50 facing the grain tank unit 9, and the first surface 52 The mounting stand 20 is located inside the case part 30 at the rear of the component mounting box 40 on the opposite side of the part mounting box 40 .

The lower end of the mount 20 may be firmly fixed to the fuselage frame 14 by bolts or welding, and the component mounting box 40 may be fixed to the mount 20 . Preferably, two upper parts of the component mounting box 40 are fixed to the upper end of the mounting table 20 with two or more first fixing bolts B1, and the lower part (the aforementioned lower plate 42) is the mounting table. It may be fixed with two or more second fixing bolts (B2) in the middle of (20).

And the component mounting plate 50 is mounted on the mount 20 through two or more through bolts B3, preferably three through bolts B3 penetrating the first vertical surface 41 of the component mounting box 40. ) It can be fixed to the fixing bracket 22 integrally constituted. At this time, an anti-vibration bolt 54 integrally equipped with an anti-vibration rubber 55 may be interposed between the fixing bracket 22 and each through-bolt B3 as shown in the enlarged view of the main part of FIG. 12 .

The anti-vibration bolt 54 is installed in the anti-vibration bolt fastening hole 23 where the threaded part is formed in the fixing bracket 22, and absorbs or alleviates vibration transmitted from the mount 20 to the component mounting plate 50 in the middle. . As a result, vibration transmitted from the mounting table 20 to the component mounting plate 50 is greatly reduced, and malfunction or failure of the sensor controllers 62 and 64 due to vibration can be prevented.

The post-processing device 16 recovers performance through periodic regeneration based on detection information of the differential pressure sensor. At this time, as the regeneration generally proceeds in the form of increasing the exhaust gas temperature through fuel post-injection control to burn the PM stored in the filter, the temperature around the after-processing device 16 is in progress while regeneration for device performance recovery is in progress. will go up significantly.

Due to this, the sensor controllers 62 and 64 mounted on the component mounting box 40 may be exposed to a high-temperature environment and cause malfunction or failure. Therefore, the component mounting plate 50 on which the sensor controllers 62 and 64 are mounted is made of a metal or non-metal material having a low heat transfer rate (or high heat rejection rate), so that the heat generated by the post-processing device 16 is transferred to the sensor controller ( 62, 64) is desirable to minimize.

Meanwhile, the sensor controller mounted on the component mounting plate 50 controls a differential pressure sensor (not shown) for detecting exhaust gas pressures in front and rear of the catalyst filter in the SCR 19. (62) and a NOx sensor controller (64) for controlling a NOx sensor (not shown) for detecting the mass flow rate of nitrogen oxides in the exhaust gas passing through the exhaust pipe connected to the front and rear ends of the SCR (19) can

For reference, the differential pressure sensor controller 62 calculates the difference between the exhaust gas pressure values in front and rear of the catalytic filter measured by the differential pressure sensors in the front and rear of the catalytic filter, and transfers it to a controller that determines whether to regenerate the aftertreatment device 16, The Knox sensor controller 64 calculates the amount of reducing agent used to purify nitrogen oxides in the SCR 19 based on the measured value of the mass flow rate of the Knox sensor and transfers it to the controller of the post-processing device 16.

As mentioned above, reference numeral 28 in FIG. 11 denotes a pair of SCR fixing clamps provided to stably fix the SCR 19 to the inside of the mount 20.

Most of the combines in which the post-processing device is placed between the conventional threshing unit and the grain tank unit do not have a dedicated space to safely mount various sensor (temperature, differential pressure, Knox sensor, etc.) controllers, which are essential components of the post-processing system, There is a problem that the controllers are exposed to high temperatures and vibration environments, causing malfunctions or breakdowns.

In particular, simply arranging various sensor controllers around the measurement target according to the location of the measurement target (temperature measurement target, differential pressure measurement target, Knox measurement target, etc.) causes the sensor controllers to be distributed and arranged here and there. There is a problem in that efficiency and maintenance of sensor controllers are greatly reduced.

On the other hand, according to the combine according to the embodiment of the present invention, a dedicated mounting box for mounting the sensor controller is configured between the threshing unit and the grain tank unit, and a dedicated mounting plate is configured in a form capable of vibration isolation, so that the sensor controllers By forming a mounted configuration, sensor controllers are safely protected from vibration and high temperature environments, and malfunction or breakdown can be prevented.

In addition, unlike the conventional configuration in which sensor controllers are distributed and arranged here and there, a dedicated mounting box is placed to form a configuration in which various sensor controllers (temperature, differential pressure, Knox sensor, etc.), which are essential components of the post-processing system, are mounted, so that the sensor controller The management of the fields can be performed efficiently, and the maintainability can also be greatly improved.

In the above detailed description of the present invention, only special embodiments have been described accordingly. However, it should be understood that the present invention is not limited to the particular forms mentioned in the detailed description, but rather it is understood to include all modifications, equivalents and substitutes within the spirit and scope of the present invention as defined by the appended claims. It should be.

1: body 2: driving wheel
3: reaping unit 4: supply chain
6: Auger 7: Aircraft control unit (driver's seat)
5: threshing unit 8: sorting unit
9: grain tank unit 10: engine
11: dust cover assembly 14: aircraft frame
16: post-processing device 17: DOC (Diesel Oxidation Catalyst)
19: SCR (Selective Catalytic Reduction) 20: Mounting table
22: fixing bracket 30: case part
32: front case 33: upper surface of the front case
34: opening 40: component mounting box
41: first vertical surface 42: lower plate of component mounting box
50: component mounting plate 52: first surface
54: anti-vibration bolt 55: anti-vibration rubber
62: differential pressure sensor controller 64: Knox sensor controller
B1: 1st fixing bolt B2: 2nd fixing bolt
B3: through bolt
S1: first space

Claims (9)

In the combine in which the post-processing device is disposed in the first space between the threshing unit and the grain tank unit,
a casing covering the post-processing device in the first space;
a component mounting box installed in an opening in the center of the front face of the case unit facing the grain tank unit in a recessed form toward the inside of the case unit;
a component mounting plate spaced apart from the first vertical plane at a distance from the first vertical plane of the component mounting box; and
It includes; a mount for supporting the component mounting box to be located in the opening,
Sensor controllers are mounted on the first surface of the component mounting plate facing the grain tank unit,
The combine, characterized in that the mounting base is located inside the case part behind the component mounting box opposite to the first surface.
According to claim 1,
The post-processing device includes a Diesel Oxidation Catalyst (DOC) and a Selective Catalytic Reduction (SCR),
The combine, characterized in that the DOC is disposed relatively above in the first space, and the SCR is disposed below the DOC.
According to claim 1,
The upper surface of the case portion is configured to be inclined downward in a direction facing the grain tank portion,
A combine, characterized in that the lower plate of the component mounting box is inclined downward in the same direction as the upper surface of the case.
According to claim 1,
The case part,
A front case in which the opening is formed;
It consists of a rear case that divides an accommodation space for accommodating the post-processing device therein together with the front case,
The front case and the rear case are fixed to one side and the other side of the mount mounted on the body frame, respectively, to divide the accommodation space.
According to claim 1,
The upper part of the component mounting box is fixed to the top of the mounting table with two or more first fixing bolts, and the lower part is fixed to the middle of the mounting table with two or more second fixing bolts.
The component mounting plate is a combine, characterized in that fixed to the mounting base by two or more through bolts penetrating the first vertical surface.
According to claim 5,
A combine, characterized in that an anti-vibration bolt integrally provided with anti-vibration rubber is interposed between the mount and each through-bolt.
According to claim 6
The anti-vibration bolt is installed in the anti-vibration bolt fastening hole of the fixing bracket configured in the mounting table to absorb vibration transmitted from the mounting table to the component mounting plate in the middle.
According to claim 1
The sensor controller,
A differential pressure sensor controller for controlling a differential pressure sensor for detecting exhaust gas pressures in front and rear of the catalyst filter in the SCR constituting the post-processing device;
The combine characterized in that it comprises a NOx sensor controller for controlling a NOx sensor for detecting the mass flow rate of nitrogen oxides in the exhaust gas passing through the exhaust pipe connected to the front and rear ends of the SCR.
According to claim 1,
The combine, characterized in that the component mounting plate is composed of a metal or non-metal material with a low heat transfer rate.

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