KR102297510B1 - Combustion device for vehicle exhaust gas reduction device - Google Patents

Abstract

The present invention relates to a combustion apparatus for a vehicle exhaust gas reduction apparatus, comprising: a mainframe in which an exhaust gas inflow pipe is connected to communicate with one outer circumferential surface on one side, a space is formed therein, a burner mounting unit is formed to mount a burner on one end unit, and a fuel gas outlet is formed on the other end unit for discharging combustion gas; and a combustion unit formed in the mainframe and connected to the burner mounting unit. The combustion unit includes: a gas transfer pipe engaged with an opening unit of the exhaust gas inflow pipe and connected to communicate with the burner mounting unit and supplying a part of the exhaust gas directly to the burner; an outer pipe body in which one end is formed toward the middle of the opening unit of the exhaust gas inflow pipe, and the other end is formed to have an inclined outer surface toward the combustion gas outlet, so that the inner cross-sectional area is gradually reduced from the end to the other end, and on the outer circumferential surface, a large number of first inflow holes are formed in a circumferential direction; and an inner pipe body engaged with the inside of the outer pipe body and having a space by being apart from the inner circumferential surface of the outer pipe body, and communicating with the burner mounting unit. The present invention aims to provide the combustion apparatus for a vehicle exhaust gas reduction apparatus, which is capable of maintaining the combustion rate in a stable manner.

Description

Combustion device for vehicle exhaust gas reduction device

The present invention relates to a combustion device for an exhaust gas reduction device for a vehicle that removes soot by burning exhaust gas generated during driving of the vehicle.

An engine is an internal combustion engine that converts thermal energy into mechanical energy when fuel is mixed with air and explodes, and is widely used in vehicles, generators, and the like.

Diesel engines have excellent thermal efficiency and are used in most large-power generators.

Diesel engines are pointed out as major causes of air pollution because they emit a large amount of particulate matter, such as soot, along with harmful substances such as carbon monoxide, hydrocarbons, and nitrogen oxides, while having excellent thermal efficiency.

As a way to solve this problem, a device for reducing exhaust gas fumes is installed in the exhaust port of the diesel engine.

The filter used in such a soot reduction device purifies the exhaust gas by collecting particulate matter in the exhaust gas of the diesel engine.

Among the various types of filters, the regenerative filter can be regenerated by applying heat to it and burning particulate matter collected therein.

Republic of Korea Patent No. 10-1138251 discloses a smoke reduction device for a vehicle.

On the other hand, in the conventional vehicle exhaust gas reduction device, the combustion efficiency of carbon, which is mainly mixed in exhaust gas, does not exhibit a satisfactory effect, and thus the lifespan of the filter is shortened and the replacement period of the filter is shortened, which inevitably increases the maintenance cost. If the replacement cycle is not properly observed, there is a problem that air pollution is caused.

That is, in order to increase the combustion efficiency, the exhaust gas must be intensively supplied to the center of the flame.

However, the prior art has a disadvantage in that the combustion efficiency is lowered because the structure for inducing the exhaust gas to be introduced and burned in the burner flame is insufficient, and thus the removal of carbon is insufficient.

The present invention has been devised to solve the problems of the prior art, and the exhaust gas can be concentrated and supplied to the burner flame, so that the removal efficiency can be significantly increased by burning the carbon particles contained in the exhaust gas, thereby extending the filter life. An object of the present invention is to provide a combustion apparatus for an exhaust gas reduction apparatus for a vehicle in which maintenance costs can be reduced.

The above object of the present invention is that the exhaust gas inlet pipe is connected to one side of the outer circumferential surface, a space is formed therein, a burner mounting part to which a burner is mounted is formed at one end, and combustion to discharge combustion gas at the other end. a body formed with a gas outlet; a combustion unit formed inside the main body and connected to the burner mounting unit;

The combustion unit,

a support coupled to the opening of the exhaust gas inlet pipe, and a gas transfer pipe having one end coupled to the support and the other end connected to a burner mounting unit to directly supply a portion of the exhaust gas to the burner;

One end is formed toward the middle of the opening of the exhaust gas inlet pipe, and the other end has an outer surface inclined toward the combustion gas outlet so that the internal cross-sectional area becomes gradually smaller from one end to the other end. an exterior body formed in a direction, each of the first inlet holes having a first vane inclined toward the inside;

an inner tube coupled to the inside of the outer body, spaced apart from the inner circumferential surface of the outer body to form a space, a plurality of sixth inlet holes are formed, and an inner tube to communicate with the burner mounting part;

It can be achieved by the combustion device of the exhaust gas reduction device for a vehicle including; a blocking member formed at the end of the exterior body and mounted in close contact with the inner circumferential surface of the body.

The gas transfer pipe has openings formed at both ends, one end of the opening is coupled to the support, and the other end of the opening is coupled to the burner mounting part, and is formed to be inclined downward from one end to the other end so that the flow of exhaust gas can be smooth. do.

The support is composed of a central fitting hole to which the gas transport pipe is coupled, and a plurality of supporters radially formed on the outer circumferential surface of the central fitting hole, and a plurality of vent holes through which the exhaust gas passes are formed between the plurality of supporters. do.

One end of the first vane of the outer body is connected to the inner circumferential surface of the first inlet hole, and is inclined inwardly to form an inclination angle of 40 to 50°, and the inner tube body has a plurality of sixth inlet holes, It is characterized in that the end of the vane 1 is formed so as to be in contact with the sixth inlet hole of the inner tube so that the exhaust gas flowing in through the first inlet hole is supplied to the sixth inlet hole.

The blocking member separates the combustion part from the inside of the main body to form a gas retention chamber in which exhaust gas can stay for a predetermined time.

The blocking member has a circular plate shape, a plurality of holes are formed, exhaust gas can be transported through the plurality of holes, and a combustion action is additionally generated by a flame at the rear of the blocking member so that it is suitable for high output. characterized in that

The hole has a diameter of 2 to 4 mm, and a plurality of holes are formed in the circumferential direction of the blocking member.

According to the present invention, it is classified into low output and high output according to the vehicle displacement, and in the case of high output, the exhaust gas can be transferred to the rear through the hole of the blocking member, and the combustion can be performed again in the rear, so that it is rapidly accelerated in the high-speed section Even in the case of igniting, the ignition state can be stably maintained and the combustion rate can be stably maintained.

1 is a perspective view of a combustion device of an exhaust gas reduction device for a vehicle according to the present invention;
2 is an exploded perspective view of the combustion device of the exhaust gas reduction device for a vehicle according to the present invention;
3 is a cross-sectional perspective view of a 'combustion unit' of the combustion device of the exhaust gas reduction device for a vehicle according to the present invention;
4 is a cross-sectional view of FIG. 3 ;
5 is a perspective view showing a 'combustion unit' according to another embodiment;
6 is a perspective view showing the action of a 'combustion unit' according to another embodiment;
7 is a graph showing experimental data of an embodiment without a hole in the blocking member;
8 is a graph showing experimental data of an embodiment in which a plurality of holes are formed in the blocking member.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. However, since various changes may be made to the embodiments, the scope of the patent application is not limited or limited by these embodiments. It should be understood that all modifications, equivalents and substitutes for the embodiments are included in the scope of the rights.

Specific structural or functional descriptions of the embodiments are disclosed for purposes of illustration only, and may be changed and implemented in various forms. Accordingly, the embodiments are not limited to a specific disclosure form, and the scope of the present specification includes changes, equivalents, or substitutes included in the technical spirit.

Although terms such as first or second may be used to describe various components, these terms should be interpreted only for the purpose of distinguishing one component from another. For example, a first component may be termed a second component, and similarly, a second component may also be termed a first component.

When a component is referred to as being “connected to” another component, it may be directly connected or connected to the other component, but it should be understood that another component may exist in between.

The terms used in the examples are used for description purposes only, and should not be construed as limiting. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present specification, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the embodiment belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

In addition, in the description with reference to the accompanying drawings, the same components are given the same reference numerals regardless of the reference numerals, and the overlapping description thereof will be omitted. In the description of the embodiment, if it is determined that a detailed description of a related known technology may unnecessarily obscure the gist of the embodiment, the detailed description thereof will be omitted.

Advantages and features of the present invention and methods of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in a variety of different forms, and only these embodiments allow the disclosure of the present invention to be complete, and common knowledge in the technical field to which the present invention belongs It is provided to fully inform the possessor of the scope of the invention, and the present invention is only defined by the scope of the claims.

In the embodiments of the present invention, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. have meaning Terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in an embodiment of the present invention, an ideal or excessively formal meaning is not interpreted as

The shapes, sizes, proportions, angles, numbers, etc. disclosed in the drawings for explaining the embodiments of the present invention are exemplary, and thus the present invention is not limited to the illustrated matters. In addition, in describing the present invention, if it is determined that a detailed description of a related known technology may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. When 'include', 'have', 'consist', etc. mentioned in this specification are used, other parts may be added unless 'only' is used. When a component is expressed in the singular, the case in which the plural is included is included unless otherwise explicitly stated.

In interpreting the components, it is interpreted as including an error range even if there is no separate explicit description.

In the case of a description of the positional relationship, for example, when the positional relationship of two parts is described as 'on', 'on', 'on', 'beside', etc., 'right' Alternatively, one or more other parts may be positioned between the two parts unless 'directly' is used.

Reference to an element or layer “on” another element or layer includes any intervening layer or other element directly on or in the middle of another element. Like reference numerals refer to like elements throughout.

The size and thickness of each component shown in the drawings are illustrated for convenience of description, and the present invention is not necessarily limited to the size and thickness of the illustrated component.

Each feature of the various embodiments of the present invention may be partially or wholly combined or combined with each other, and technically various interlocking and driving are possible, as will be fully understood by those skilled in the art, and each embodiment may be independently implemented with respect to each other, It may be possible to implement together in a related relationship.

Among the accompanying drawings, FIG. 1 is a perspective view of a combustion device of an exhaust gas reduction device for a vehicle according to the present invention, FIG. 2 is an exploded perspective view of the combustion device of an exhaust gas reduction device for a vehicle according to the present invention, and FIG. A cross-sectional perspective view of a 'combustion unit' of the combustion device of the exhaust gas reduction device for a vehicle, FIG. 4 is a cross-sectional view of FIG. 3, FIG. 5 is a perspective view showing a 'combustion unit' according to another embodiment, FIG. 6 is another embodiment A perspective view showing the action of the 'combustion unit' according to the example, FIG. 7 is a graph showing experimental data of an embodiment in which there is no hole in the blocking member, and FIG. 8 is a graph showing experimental data of an embodiment in which a plurality of holes are formed in the blocking member. .

1 to 6, in the exhaust gas reduction device for a vehicle according to the present invention, the exhaust gas inlet pipe 21 is connected to one side of the outer circumferential surface, a space is formed therein, and a burner (not shown) a main body (2) having a burner mounting part (24) to which it is mounted, and having a combustion gas outlet (25) for discharging combustion gas at the other end thereof; and a combustion part (4) formed inside the body (2) and connected to the burner mounting part (24).

The main body 2 is made of a cylindrical tube with both ends open, an opening hole is formed on one side so that the burner mounting part 24 is coupled, and the exhaust gas inlet pipe 21 is coupled to the burner mounting part 24 at a right angle.

The main body 2 is spaced apart from the outer surface so that a heat dissipation part 22 is further formed to prevent heat transfer, and a filter 26 passing through the combustion gas outlet 25 is formed.

The burner mounting part 24 has a flange 242 formed on the outside, a coupling hole 244 is formed therein, and the combustion part 4 is coupled to the coupling hole 244 to be installed in the body 2 .

The exhaust gas flowing in from the exhaust gas inlet pipe 21 is directly introduced into the combustion unit 4 .

The combustion part 4 is connected to the burner mounting part 24, a plurality of through holes are formed to allow exhaust gas to flow in, and the flame F of the burner B is burned inside, and the exterior having openings on both sides The sieve 3, the inner tube body 5 coupled to the inside of the outer body 3, a gas transfer pipe 7 for supplying a part of the exhaust gas directly to the burner mounting part 24, and the outer body 3 ) is formed at the end, and the blocking member 34 is mounted in close contact with the inner peripheral surface of the body (2); includes.

One end of the outer body 3 is formed toward the middle of the opening 210 of the exhaust gas inlet pipe 21, and the other end has an outer surface inclined toward the combustion gas outlet 25 so that the internal cross-sectional area increases from one end to the other end. It is formed gradually smaller, and a plurality of first inlet holes 310 are formed in the circumferential direction on the outer circumferential surface, and the first vanes 312 are formed to be inclined toward the inside in each of the first inlet holes 310 .

One end of the first vane 312 of the exterior body 3 is connected to the inner circumferential surface of the first inlet hole 310 and is inclined inwardly to form an inclination angle of 40 to 50°.

The outer surface of the outer body 3 is convexly protruded to form a peak 30 in the circumferential direction, and the tip 30 is convexly formed to correspond to the center of the opening of the exhaust gas inlet pipe 21 . .

The outer body 3 is formed with first and second tapered portions 31 and 32 that are inclined downward from the tip 30 to both sides, and the first tapered portion 31 is formed toward the combustion gas outlet 25 , , the second tapered portion 32 is formed toward the burner mounting portion 24 .

The inner tube body 5 is coupled to the inside of the outer body 3, is spaced apart from the inner circumferential surface of the outer body 3 to form a spaced space, a plurality of sixth inlet holes 540 are formed, and the burner mounting part ( 24) to communicate.

The inner tube body 5 is spaced apart from the outer body 3 to form a chamber 550 , and the first tapered part 31 has a plurality of sixth inlet holes 540 communicating with the chamber 550 uniformly. Exhaust gas may be introduced in large quantities.

Therefore, the exhaust gas uniformly introduced in a large amount can be burned quickly and stably by the flame of the burner, so that the combustion efficiency can be maintained.

On the other hand, a support 72 coupled to the opening 210 of the exhaust gas inlet pipe 21, one end is coupled to the support 72, and the other end is connected to pass through the burner mounting part 24 to remove a portion of the exhaust gas. A gas delivery pipe 7 to be directly supplied to the burner; is included.

The gas transport pipe 7 has openings formed at both ends, one end of the opening is coupled to the support 72, and the other end of the opening is coupled to the burner mounting part 24, and is inclined downward from one end to the other end to flow the exhaust gas. to make this go smoothly.

The support 72 is composed of a central fitting hole 722 to which the gas transport pipe 7 is coupled, and a plurality of supporters 724 radially formed on the outer circumferential surface of the central fitting hole 722, and a plurality of supporters ( A plurality of vent holes 726 through which exhaust gas passes are formed between 724 .

On the other hand, a blocking member 34 is formed at the distal end of the outer body 3 , and the blocking member 34 is in close contact with the inner circumferential surface of the main body 2 to form a partition wall.

The blocking member 34 separates the combustion unit 4 and the interior of the body 2 to form a gas retention chamber 728 in which the exhaust gas can stay for a predetermined time.

The blocking member 34 is coupled to the end of the first tapered portion 31 of the outer body 3 , and is made of a circular plate protruding outward, and is an opening at the end of the combustion tube portion 54 on the lead-out side of the inner tube body 5 . A through hole 340 is formed to communicate with the body 2 and is mounted in close contact with the inner circumferential surface of the main body 2 .

Therefore, the exhaust gas introduced through the exhaust gas inlet pipe 21 is introduced into the combustion unit 4 while staying only in the space inside the body 2 partitioned by the blocking member 34, so that the entire amount can be combusted.

A plurality of first inlet holes 310 are formed in the first tapered portion 31 in the circumferential direction, and a first vane 312 is formed for each of the first inlet holes 310 , and downward toward the blocking member 34 . formed obliquely.

5 and 6, the blocking member 34 has a circular plate shape, a plurality of holes 342 are formed, and exhaust gas can be transferred through the plurality of holes 342, and the blocking member 34 is blocked. A combustion action is further generated by the flame at the rear of the member 34, making it suitable for high output.

According to one example, the hole 342 has a diameter of 2 to 4 mm, and a plurality of holes are formed in the circumferential direction of the blocking member 34 . Preferably, the number of holes 342 may consist of 20 to 25. Of course, this is only an example, and the number may be added or subtracted as needed.

The standard of high output and low output is set to less than 156 horsepower, low output, high output, and less than 176 horsepower.

As a result of an experiment by dividing the test into a low speed section and a high speed section, it is confirmed that the difference between forming the hole 342 or not forming the hole 342 in the low speed section is not significant.

The low speed is less than 60 km, and the high speed is less than 80 km.

However, it can be seen that the graph is a little more stable by drilling the hole 342 in the high-speed section (= great pressure is generated).

This is because, at the moment when the device is being regenerated (ignition state), if the driver accelerates rapidly, if there is no hole 342, the ignition state is disturbed and the fire is weakened.

This is because it can also be expressed as a symptom of extinguishing during regeneration, the present invention drills a number of holes 342 in the blocking member 34 in order to overcome this disadvantage, so that all exhaust gases do not pass through the place where ignition occurs. It was possible to maintain the shape of the flame by allowing some to flow through the side.

7 is a graph showing experimental data of an embodiment in which there is no hole in the blocking member.

The definition of each item indicated in the graph is as follows.

P1 is the pressure of the exhaust gas,

T1 is the temperature of the current vehicle exhaust gas,

T2 is the temperature of the exhaust gas that has passed through the combustion chamber (internal temperature during regeneration),

T3 is the temperature of the exhaust gas that has passed through the DOC filter,

T4 is the temperature of the exhaust gas that has passed through the DPF filter.

Referring to FIG. 7 , it can be seen that the temperature of the temperature T2 of the exhaust gas that has passed through the combustion chamber changes rapidly during rapid acceleration.

As a result, it can be seen that the exhaust gas pressure P1 is increased.

Meanwhile, FIG. 8 is a graph showing experimental data of an embodiment in which a plurality of holes 342 are formed in the blocking member 34 .

Referring to FIG. 8 , it can be seen that, during high-speed driving, the stability of the exhaust gas temperature T1 and the exhaust gas pressure P1 and the temperature vertical range of the temperature T2 of the exhaust gas exiting the combustion chamber are reduced.

Although the embodiments of the present invention have been described in more detail with reference to the accompanying drawings, the present invention is not necessarily limited to these embodiments, and various modifications may be made within the scope without departing from the technical spirit of the present invention. . Therefore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these embodiments. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. The protection scope of the present invention should be construed by the following claims, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

Therefore, other implementations, other embodiments, and equivalents to the claims are also within the scope of the following claims.

2: main body 3: exterior body
4: combustion part 5; inner body
21: exhaust gas inlet pipe 24: burner mounting part
25: flue gas outlet 26: filter
30: tip 31: first tapered part
34: blocking member 54: extraction side combustion pipe part
53: Hwantok 52; Combustion tube inlet

Claims (3)

The exhaust gas inlet pipe is connected to one side of the outer circumferential surface, a space is formed therein, a burner mounting portion for mounting a burner is formed at one end, and a combustion gas outlet for discharging combustion gas is formed at the other end thereof;
It includes; a combustion unit formed inside the main body and connected to the burner mounting unit;
The combustion unit,
a support coupled to the opening of the exhaust gas inlet pipe, and a gas transfer pipe having one end coupled to the support and the other end connected to a burner mounting unit to directly supply a portion of the exhaust gas to the burner;
One end is formed toward the middle of the opening of the exhaust gas inlet pipe, and the other end has an outer surface inclined toward the combustion gas outlet so that the internal cross-sectional area becomes smaller from one end to the other end. an exterior body formed in a direction, each of the first inlet holes having a first vane inclined toward the inside;
an inner tube coupled to the inside of the outer body, spaced apart from the inner circumferential surface of the outer body to form a spaced space, a plurality of sixth inlet holes formed, and an inner tube to communicate with the burner mounting part;
a blocking member formed at an end of the outer body, mounted in close contact with the inner circumferential surface of the main body, and separating the combustion unit from the inside of the main body to form a gas retention chamber in which exhaust gas can reside;
Combustion device of an exhaust gas reduction device for a vehicle, characterized in that it comprises a. The method of claim 1,
The gas pipe is
Openings are formed at both ends, the opening at one end is coupled to the support, the opening at the other end is coupled to the burner mounting part, and is formed to be inclined downward from one end to the other end,
The support is composed of a central fitting hole to which the gas transport pipe is coupled, and a plurality of supporters radially formed on the outer circumferential surface of the central fitting hole, and a plurality of vent holes through which the exhaust gas passes between the plurality of supporters are formed. A combustion device for a vehicle exhaust gas reduction device. The method of claim 1,
One end of the first vane of the exterior body is connected to the inner circumferential surface of the first inlet hole, and is bent inwardly to form an inclination angle of 40 to 50°,
The inner tube body has a plurality of sixth inlet holes, and the end of the first vane is formed to be in contact with the sixth inlet hole of the inner tube body so that the exhaust gas flowing in through the first inlet hole is supplied to the sixth inlet hole. will,
The blocking member is characterized in that a plurality of holes are formed, exhaust gas can be transported through the plurality of holes, and a combustion action is additionally generated by a flame at the rear of the blocking member to be suitable for high output. Combustion device for vehicle exhaust gas reduction device.

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