KR20110054237A - Exhaust gas reduction apparatus - Google Patents

Abstract

PURPOSE: An exhaust gas reducing device is provided to prevent a filter from being cooled and improve the reproduction capacity of a filter by blocking low temperature exhaust gas flowing in the filter. CONSTITUTION: An exhaust gas reducing device comprises a diesel particulate filter(20), a flow path partition(40), an opening and closing member(60), and a drive unit(80). The diesel particulate filter is placed on a flow path for the outflow of exhaust gas. The diesel particulate filter has a cylindrical form having a collection space. The flow path partition is placed on one side between both sides of the filter. An exhaust gas connection hole(44) corresponding to a collection space is partitioned by the flow path partition. One or more opening and closing members are placed in the flow path partition. The opening and closing member reciprocates between the open position and the close position for opening and closing the connection hole. The drive unit selectively opens and closes the connection hole by the opening and closing member.

Description

Exhaust gas reduction device {EXHAUST GAS REDUCTION APPARATUS}

The present invention relates to an exhaust gas reducing device, and more particularly, to exhaust the low-temperature exhaust gas flowing into the filter at the time of regeneration of the filter to prevent cooling of the exhaust gas, thereby improving the regeneration capacity of the filter. It relates to an abatement device.

In general, diesel engines have an advantage over gasoline engines in fuel economy and power output. However, diesel engines have a disadvantage in that, unlike gasoline engines, harmful substances such as particulate matter (PM) are discharged together when exhaust gas is discharged.

Since these particulate matters are recognized as a cause of air pollution, in many countries, restrictions on the emission of harmful substances such as particulate matters are being tightened.

On the other hand, in order to meet the emission regulations of countries for harmful substances, such as particulate matter, technologies that can reduce the harmful substances have emerged. As a technique capable of reducing harmful substances such as particulate matter, particulate matter is collected through a diesel particulate filter (DPM) in an exhaust gas flow path between a diesel engine and a muffler.

Here, the filter collects particulate matter discharged together with the exhaust gas. The method of regenerating particulate matter trapped in the filter burns the particulate matter trapped in the filter by directly heating the filter. In order to directly heat the filter, the filter is connected to an electrode portion to which power is applied.

However, the conventional method of directly heating the filter has a problem that excessive energy is required to heat the filter by cooling the filter when the exhaust gas flowing into the filter is low temperature. In addition, since a conventional filter generally has one collecting space, there is also a problem that the service life of the filter is reduced due to overheating or subcooling of the filter.

Accordingly, an object of the present invention is to provide an exhaust gas reducing device having an improved structure so that low temperature exhaust gas flowing into a filter can be blocked to prevent cooling of the filter.

In addition, another object of the present invention is to provide an exhaust gas reducing device that can improve the trapping performance of the filter and prevent overheating by forming a plurality of trapping spaces of the filter.

The objects of the present invention are not limited to the above-mentioned objects, and other objects which are not mentioned will be clearly understood by those skilled in the art from the following description.

Means for Solving the Problems According to the present invention, a diesel particulate filter having a cylindrical shape is disposed on a flow path through which exhaust gas flows out from an engine and has at least two collection spaces for collecting particulate matter contained in the exhaust gas. (Diesel Particulate Filter), and at least one flow path partition portion formed on at least one side of both sides of the filter and communicating passages of exhaust gases corresponding to at least two collection spaces, and at least one flow path partition portion. And a driving member for reciprocating between an open position and a closing position for opening and closing the communication port, and for providing a driving force to the opening and closing member so that the communication port is selectively opened and closed by the opening and closing member. It is made by an exhaust gas reducing device characterized in that it comprises a unit.

Here, a plurality of power supply units for supplying power to the filter and the collecting spaces to be applied to the collection space divided into at least two or more power from the power supply, heating the collection spaces of the filter An electrode portion of the filter, a temperature sensing portion sensing the temperature of the filter, and a communication port selectively opened and closed by the opening / closing member based on a signal detected by the temperature sensing portion. It may further include a control unit for controlling the drive unit for providing a driving force to the opening and closing member.

The driving unit may include a motor generating a driving force and a driving shaft interposed between the motor and the opening / closing member to transmit the driving force provided from the motor to the opening / closing member.

The communication port is preferably equally divided radially with respect to the center of the flow path compartment.

Preferably, the communication port may be divided into areas equal to the area of the flow path compartment.

On the other hand, the flow path section, the first flow path partition portion is formed in the radially equally divided first communication section, the second passage is formed in concentric circles with a smaller area than the first flow path partition portion, the radially equally divided second communication It may include a second euro compartment portion in which a sphere is formed.

And, the axis of the drive shaft penetrates along the center of the flow path partition, the opening and closing member is connected to the drive shaft is preferably reciprocally rotated between the open position and the closed position of the communication port.

The air supply unit is rotatably connected between the engine and the opening and closing member so as to be interlocked with the rotational movement of the opening and closing member, and an air supply unit has a supply path for combustion gas, oxidant, fuel and air or reducing agent supplied into the filter. can do.

In addition, preferably, the drive shaft and the opening and closing member may be provided in plural numbers, and the communication holes, which are divided in area, may be opened and closed in a flap manner.

The axis of the drive shaft penetrates along the center of the flow path partition, and the opening and closing member is connected to the drive shaft, the first opening and closing member reciprocally rotated to open and close the first communication port, and is connected to the drive shaft The second communication port may include a second opening / closing member which is reciprocally rotated to open and close the second communication port.

It is preferable that the first opening and closing member and the second opening and closing member are connected to separate drive shafts, and are independently reciprocally rotated to open and close the first communication opening and the second communication opening, respectively.

The flow path block and the opening and closing member are disposed on both sides of the filter, and the control unit controls the driving unit to open and close the communication port by interlocking the opening and closing members disposed on both sides of the filter. Do.

Preferably, the filter may be made of silicon carbide (SiC).

Preferably, the filter may be coated with an oxidation catalyst or a storage reduction catalyst.

At least one of the opening and closing member and the air supply unit may be provided with a combustion device for generating a high temperature combustion gas.

Preferably, the opening and closing member may be provided with an ignition device for starting combustion when fuel and air are supplied.

In addition, preferably, the opening and closing member may be formed with at least one vent hole corresponding to 1 to 25% of the opening and closing member.

Specific details of other embodiments are included in the detailed description and drawings.

Therefore, according to the above-mentioned means for solving the problem, a flow path block portion having a plurality of communication ports corresponding to the plurality of collecting spaces is disposed on at least one side of the filter in which the plurality of collecting spaces is formed, and the plurality of communicating holes can be selectively opened and closed. It is possible to block the low-temperature exhaust gas flowing into each collection space by mounting the opening and closing member, thereby providing an exhaust gas reducing device that can reduce the energy required for heating the filter.

In addition, by blocking the exhaust gas containing a large amount of oxygen, it is possible to easily create a reducing atmosphere of the storage reduction catalyst to achieve an effective reduction reaction.

The effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

Advantages and features of the present invention, and a configuration and method for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, only the embodiments are to make the disclosure of the present invention complete, and common knowledge in the art to which the present invention pertains. It is provided to fully inform the person having the scope of the invention, which is defined only by the scope of the claims. For reference, in describing the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

Prior to the description, a preferred embodiment of the exhaust gas reducing device according to the present invention includes the first to fourth embodiments. In the description of the embodiments, the first and second embodiments have been described with the same reference numerals in the same name, but the third embodiment has the same name as the first and second embodiments, Note that the compartment and the opening and closing member are described with different reference numerals in advance. In addition, the exhaust gas reducing apparatus according to the fourth exemplary embodiment of the present invention is described with the same reference numerals for the same configuration of the first embodiment, but it is noted that the air supply unit is described with different reference numerals.

In addition, hereinafter, as an exemplary embodiment of the present invention, the exhaust gas reducing device mounted on a vehicle, but will be described in advance that all can be applied to a device using a diesel engine, such as a ship.

1 is a schematic cross-sectional view of an exhaust gas reducing device according to a preferred embodiment of the present invention.

As shown in FIG. 1, the exhaust gas reducing device 1 according to the present invention includes a housing 10, a filter 20, a flow path partition 40, an opening and closing member 60, a driving unit 80, and a power supply. The supply unit 100, an electrode unit 120, a temperature sensing unit 160, and a controller 180 are included.

The housing 10 includes a housing body 12, an inlet 14 and an outlet 16. The housing body 12 basically receives the filter 20, the flow path partition 40, and the opening and closing member 60. The housing body 12 is provided in a cylindrical shape in consideration of the flow resistance of the exhaust gas flowing therein. Of course, unlike the present invention, the housing body 12 may be provided in various shapes such as a rectangular cylinder in addition to the cylindrical shape.

Inlet 14 is formed between the diesel engine (not shown) and the filter 20 serves as a flow path for guiding the exhaust gas discharged from the diesel engine to the filter 20. In addition, the outlet 16 is formed between the filter 20 and a muffler (not shown) to serve as a flow path for guiding the exhaust gas passing through the filter 20 to the muffler.

Here, the inlet 14 and the outlet 16 are formed on both sides of the housing body 12 along the longitudinal direction of the housing body 12. However, the inlet 14 and the outlet 16 are only formed along the longitudinal direction of the housing body 12 as an embodiment of the present invention, the inlet 14 and outlet 16 is the length of the housing body 12 It may be formed in the transverse direction with respect to the direction.

Next, FIG. 2 is an exploded perspective view of a flow path compartment and a filter equipped with the opening and closing member of the exhaust gas reducing device according to the first embodiment of the present invention, and FIG. 3 is a flow path compartment including the opening and closing member shown in FIG. 2. And a combined perspective view of the filter.

As shown in FIG. 2 and FIG. 3 as an embodiment of the present invention, the filter 20 is disposed on a flow path through which exhaust gas is discharged from a diesel engine, and is a cylindrical diesel collecting particulate matter contained in the exhaust gas. A particulate particulate filter (DPM) 20.

The filter 20 has a filter body 22 made of a ceramic material containing silicon carbide (SiC). Here, the filter body 22 is partitioned into four collection spaces 24 by the partition wall as an embodiment of the present invention. That is, the collection space 24 of the filter 20 is partitioned into four collection spaces 24 by partition walls divided by 90 degrees. The collection space 24 of the filter 20 serves to collect particulate matter included in the exhaust gas as well as the flow path through which the exhaust gas flows.

Although the filter body 22 of the present invention is shown as a vacant space for illustration of other related configurations, the interior of the filter body 22 is composed of a plurality of cells, such as a honeycomb structure. Thus, the interior of the filter body 22 is composed of a plurality of cells to improve the collection performance of particulate matter contained in the exhaust gas.

The flow path partition portion 40 includes a partition body 42 and a communication port 44 formed in the partition body 42. The flow path block 40 is disposed on one side of the filter 20 adjacent to the inlet 14 as a first embodiment of the present invention.

The partition body 42 is provided in a cylindrical shape corresponding to the shape of the filter 20. In one embodiment of the present invention, the partition body 42 has a cylindrical shape to correspond to the cylindrical filter 20. The partition body 42 is coupled to one side of the filter 20. In addition, a communication port 44 is formed in the partition body 42 to communicate with the collection space 24 of the filter 20 by the partition wall.

The communication port 44 is formed in plurality by partitions arranged in the partition body 42. Four communication ports 44 according to the first embodiment of the present invention are formed corresponding to the collection space 24 of the filter 20. Each communication port 44 communicates with the collection space 24 of the filter 20 to ensure ventilation of the exhaust gas. That is, the communication port 44 is formed to be radially divided evenly with respect to the center of the flow path block 40.

Next, the opening and closing member 60 is disposed in the flow path block 40 and reciprocated between an open position and a closed position for opening and closing the communication port 44. One opening and closing member 60 is disposed in the flow path block 40 as a first embodiment of the present invention. The opening and closing member 60 is connected to the driving unit 80 to selectively open and close the communication port 44 by the driving force from the driving unit 80. The opening and closing member 60 is connected to the drive shaft 84 penetrated along the center of the flow path partition portion 40, and is reciprocally rotated between the open position and the closed position by the driving force of the drive shaft 84.

For example, the opening and closing member 60 is operated to selectively open and close the four communication ports 44. That is, when one of the four communication ports 44 is closed by the opening and closing member 60, the remaining three communication ports 44 are opened. The opening and closing member 60 rotates in the horizontal direction of the longitudinal direction of the partition body 42 by the driving force provided from the driving unit 80. One opening and closing member 60 is disclosed as one embodiment of the present invention, but two may be disclosed. At this time, the opening and closing member 60 is preferably disposed to face each other in order to avoid mutual interference.

The drive unit 80 includes a motor 82 and a drive shaft 84. The driving unit 80 serves to provide a driving force to the opening and closing member 60 so that the communication port 44 is selectively opened and closed by the opening and closing member 60.

The motor 82 is a device for generating a driving force. The motor 82 may be a general DC motor and an AC motor. However, the motor 82 according to an embodiment of the present invention preferably uses a stepping motor capable of adjusting the rotation angle of the drive shaft 84.

The drive shaft 84 includes a first drive shaft 84a and a second drive shaft 84b. The first drive shaft 84a is connected to the motor 82 and interlocks with the driving force from the motor 82. In addition, the second driving shaft 84b is connected to the opening and closing member 60 to provide driving force to the opening and closing member 60. Here, the first drive shaft (84a) and the second drive shaft (84b) is an embodiment, a known technique is meshed by a bevel gear (bevel gear). Of course, the motor 82 and the drive shaft 84 may be accommodated inside the flow path block 40 and directly connected to the opening and closing member 60. As such, the driving unit 80 may be applied with various known driving methods that may provide driving force to the opening and closing member 60.

The power supply unit 100 is composed of a battery for generating a voltage of 12V or 24V. The power supply unit 100 is electrically connected to the electrode unit 120 to be described later to supply power to the electrode unit 120.

The electrode unit 120 is connected to the filter 20 to heat the filter 20. The electrode unit 120 heats the filter 20 by using the power applied from the power supply unit 100. In one embodiment of the present invention, two electrode units 120 are connected to both sides of the filter 20, that is, to each collection space 24. However, only one electrode unit 120 may be connected to each collection space 24. The electrode unit 120 connected to each collection space 24 heats only the collection space 24. Of course, the partition wall is preferably a heat insulating member for the insulation of each collection space (24).

On the other hand, the exhaust gas reducing device 1 according to a preferred embodiment of the present invention further includes a power amplifier 140 for amplifying the power from the power supply unit 100 to supply to the electrode unit 120.

Here, the process of heating the filter 20 by the power supply unit 100, the electrode unit 120 and the power amplifier 140 is as follows. As the temperature of the filter 20 increases by supplying power from the power supply unit 100, the resistance of the filter 20 decreases, so that the lower the temperature of the filter 20, the higher the voltage and the higher the temperature of the filter 20. The lower the voltage, the more efficient it is. At this time, the power amplifier 140 is preferably an amplification factor can be adjusted. In this case, the amplification factor of the power amplifier 140 may be controlled by the controller 180, and the energization time may be adjusted by frequency modulation.

The temperature detector 160 is provided in the filter 20 to sense the temperature of the filter 20. The signal detected by the temperature sensor 160 is transmitted to the controller 180. The temperature sensing unit 160 of the present invention is preferably provided corresponding to the plurality of collection spaces 24 so as to sense the temperature of each collection space 24 of the filter 20. The signal sensed by the temperature sensing unit 160 disposed in each collection space 24 is transmitted to the controller 180, and the controller 180 controls the operation of the opening and closing member 60 according to the detection signal. Of course, the operation control of the opening and closing member 60 is linked to the control of the drive unit (80).

The control unit 180 provides a driving unit for providing a driving force to the opening and closing member 60 so that the communication port 44 is selectively opened and closed by the opening and closing member 60 based on the signal detected by the temperature sensing unit 160. Control the operation of 80. For example, when it is determined that the detection signal from the temperature sensing unit 160 disposed in any one of the plurality of collecting spaces 24 is lower than the preset temperature, the controller 180 of the corresponding collecting space 24 is selected. Control the operation of the opening and closing member 60 so that the communication port 44 is closed. Operation control of the opening and closing member 60 is made through the operation control of the drive unit 80 under the control of the controller 180.

4 is a schematic cross-sectional configuration diagram in which a flow path block and an opening / closing member are disposed on both sides of a filter of the exhaust gas reducing device illustrated in FIG. 1.

As shown in FIG. 4, the flow path block 40 is disposed at both sides of the filter 20. Of course, two opening / closing members 60 are also disposed corresponding to the two flow path block portions 40. The controller 180 controls the operation of the two opening and closing members 60 so that the two opening and closing members 60 simultaneously open and close the communication port 44 of the flow path compartment 40 provided on both sides of the filter 20. do. For example, when one collection space 24 is closed, the communication ports 44 adjacent to both sides of the collection space 24 are closed by the two opening / closing members 60 to prevent the exhaust gas from flowing back. When the exhaust gas passes through the filter 20, the communication ports 44 on both sides are opened to ensure the ventilation of the exhaust gas.

5 is an operation front view and a plan view of the flow path compartment and the opening and closing member of the exhaust gas reducing device according to the second embodiment of the present invention.

(A) shown in FIG. 5 is a front view of the flow path block part 40, and the flow path block part 40 forms a plurality of communication ports 44 which are equally divided in area with respect to the area of the flow path block part 40. . (b) is a top view of the flow path block part 40, and the several opening / closing member 60 which opens and closes each of the some communication port 44 is arrange | positioned.

Here, the plurality of opening and closing members 60 open and close the plurality of communication ports 44 in a flap manner, respectively. The flap opening and closing member 60 is connected to the drive shaft 84, respectively, to open and close each communication port 44 under the control of the controller 180. The four opening and closing members 60 may be arranged to close the three communication ports 44 under the control of the controller 180, or may open the three communication ports 44. The opening and closing operation of the opening and closing member 60 may be made in various combinations under the control of the controller.

6 is an operation front view of the flow path compartment and the opening and closing member of the exhaust gas reducing device according to the third embodiment of the present invention.

As shown in FIG. 6, the flow path partitioning portion 340 of the exhaust gas reducing device 1 according to the third embodiment of the present invention may include the first flow passage partitioning portion 342 and the second flow passage partitioning portion 344. Include. In addition, the opening and closing member 360 of the exhaust gas reducing device 1 according to the third embodiment of the present invention includes a first opening and closing member 362 and the second opening and closing member 364.

The first flow path partitioning section 342 has a first communication port 342a divided radially and evenly. As one embodiment of the present invention, the first communication port 342a is divided into four by partition walls.

The second flow path block 344 has a smaller area than the first flow path block 342 and is formed concentrically, and has a second communication port 344a equally divided radially. The second communication port 344a is partitioned into four by partition walls. Of course, the collection space 24 of the filter 20 corresponds to the first communication port 342a and the second communication port 344a respectively formed in the first flow path partition 342 and the second flow path partition 344. It is preferable that the compartment is formed in a double.

The opening / closing member 360 includes a first opening / closing member 362 that opens and closes the first communication opening 342a of the first flow passage partitioning section 342, and a second communication opening 344a of the second flow passage partitioning section 344. It includes a second opening and closing member 364 to open and close the. Here, the first opening and closing member 362 and the second opening and closing member 364 are each independently reciprocated rotation.

The first opening / closing member 362 and the second opening / closing member 364 are reciprocally rotated by the drive shaft 84 penetrated along the centers of the first flow path partition portion 342 and the second flow path flow passage portion 344. Here, as an embodiment of the present invention, the first opening and closing member 362 and the second opening and closing member 364 is connected to the same drive shaft 84, the drive shaft 84 is provided in duplicate to the first coupled to the release and coupling The opening and closing member 362 and the second opening and closing member 364 may be independently reciprocally rotated.

Thus, the exhaust gas reducing device 1 according to the third embodiment of the present invention can block the low-temperature exhaust gas flowing into each collection space 24 by dividing the collection space 24 of the filter 20 into two. There is an advantage.

Finally, Figure 7 is a perspective view of the opening and closing member, the flow path compartment, the filter and the air supply of the exhaust gas reducing device according to a fourth embodiment of the present invention.

As shown in FIG. 7, the exhaust gas reducing device 1 according to the fourth embodiment of the present invention includes a housing 10, a filter 20, a flow path partition 40, an opening and closing member 60, and a driving unit. 80, a power supply unit 100, an electrode unit 120, a temperature sensing unit 160, a controller 180, and an air supply unit 400.

Here, the housing 10, the filter 20, the flow path block 40, the opening and closing member 60, the drive unit 80, the power supply unit 100, the electrode unit 120, the temperature sensing unit 160 and Since the controller 180 is the same as the first embodiment of the present invention, a description thereof will be omitted below.

The air supply unit 400 is rotatably connected to the rotational movement of the opening and closing member 60 between the engine and the opening and closing member 60. The air supply unit 400 is provided with a supply path of a combustion gas, an oxidizing agent, or a reducing agent supplied into the filter 20. The air supply unit 400 includes an air supply pipe 420, an injection pipe 440, and a rotation connector 460.

The air supply pipe 420 is connected to the opening and closing member 60 to communicate with the opening and closing member 60. The air supply pipe 420 forms an eccentricity on the rotation axis of the rotation connector 460 and is connected to the opening and closing member 60. The air supply pipe 420 is rotated in conjunction with the rotation of the opening and closing member 60, and forms a flow path through which the combustion gas, oxidant or reducing agent injected from the injection pipe 440 flows into the filter 20.

Injection tube 440 is in communication with the engine such that the combustion gas from the engine and the oxidant or reducing agent are guided into the filter 20. Combustion gas, oxidant, fuel and air or reducing agent injected into the injection pipe 440 are guided to the air supply pipe 420 described above and are supplied into the filter 20.

The rotary connector 460 is interposed between the air supply pipe 420 and the injection pipe 440. The rotary connector 460 is connected to the air supply pipe 420 so that the air supply pipe 420 is interlocked according to the rotational movement of the opening and closing member 60. Here, the air supply pipe 420 with respect to the rotary connector 460 is rotated by the rotary connector 460 to be eccentrically rotated. The rotary connector 460 may be connected to the air supply pipe 420 in various coupling manners such as a rotable joint. When fuel and air are introduced, an ignition device may be added to the opening and closing member to start combustion.

Thus, at least one side of the filter in which the plurality of collecting spaces are formed is arranged a flow path compartment formed with a plurality of communication ports corresponding to the plurality of collecting spaces, and equipped with an opening and closing member for selectively opening and closing the plurality of communication ports It is possible to block the low-temperature exhaust gas flowing into the collection space, thereby reducing the energy required for heating the filter.

In addition, it is possible to efficiently reduce the nitrogen oxide stored in the storage reduction catalyst by forming an atmosphere necessary for reduction. In addition, it is possible to easily regenerate the filter by administering a high temperature exhaust gas or an oxidant through the air supply.

When regeneration of the filter is required, only a part of the exhaust gas may be passed to promote the oxidation reaction. For this, at least one or more vents corresponding to 1 to 25% of the opening and closing member may be formed in the opening and closing member to assist the regeneration. have.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, . Therefore, it should be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

1 is a schematic cross-sectional view of an apparatus for reducing exhaust gas according to a preferred embodiment of the present invention;

2 is an exploded perspective view of a flow path compartment and a filter equipped with an opening and closing member of an exhaust gas reducing device according to a first embodiment of the present invention;

3 is a perspective view of the combination of the flow path block and the filter equipped with the opening and closing member shown in FIG.

4 is a schematic cross-sectional configuration diagram in which a flow path block and an opening / closing member are disposed on both sides of a filter of the exhaust gas reducing device shown in FIG. 1;

5 is an operation front view and a plan view of the flow path compartment and the opening and closing member of the exhaust gas reducing device according to a second embodiment of the present invention;

6 is an operation front view of the flow path compartment and the opening and closing member of the exhaust gas reducing apparatus according to the third embodiment of the present invention;

7 is a perspective view of an opening / closing member, a flow path block, a filter, and an air supply unit of the exhaust gas reducing device according to the fourth embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

 20: filter 24: collecting space

 40: euro compartment 44: communication sphere

 60: opening and closing member 80: drive unit

100: power supply 120: electrode

160: temperature detection unit 180: control unit

340: euro compartment 342: the first euro compartment

342a: first communication port 344: second euro compartment

344a: second communication port 360: opening and closing member

362: first opening and closing member 364: second opening and closing member

400: air supply unit 420: air supply pipe

460: rotary connection

Claims (17)

A diesel particulate filter disposed in a flow path through which the exhaust gas flows from the engine and having at least two collection spaces for collecting particulate matter contained in the exhaust gas; A flow passage partition portion disposed on at least one side of both sides of the filter and having a communication port for exhaust gas corresponding to at least two collection spaces; An opening / closing member disposed in at least one passage section and reciprocating between an open position and a closed position for opening and closing the communication port; And a driving unit for providing a driving force to the opening and closing member so that the communication port is selectively opened and closed by the opening and closing member. The method of claim 1, A power supply unit supplying power to the filter; A plurality of electrode units provided in the collection spaces so that power from the power supply unit is applied to the collection spaces partitioned into at least two or more, and heating the collection spaces of the filter; A temperature sensing unit provided in the filter and sensing a temperature of the filter; And a control unit for controlling the driving unit to provide a driving force to the opening and closing member so that the communication port is selectively opened and closed by the opening and closing member based on the signal sensed by the temperature sensing unit. Exhaust gas reduction device. The method of claim 2, The drive unit, A motor for generating a driving force; And a driving shaft interposed between the motor and the opening / closing member to transmit the driving force provided from the motor to the opening / closing member. The method of claim 3, The communication port is an exhaust gas reduction device, characterized in that divided evenly radially with respect to the center of the flow path section. The method of claim 3, The communication port is an exhaust gas reduction device, characterized in that divided by the area equal to the area of the flow path partition. The method of claim 3, The flow path compartment, A first flow passage section in which a first communication port divided radially equally is formed; And a second flow passage portion having a smaller area than the first flow passage portion and formed in a concentric circle, the second flow passage portion having a radially equally divided second communication hole formed therein. The method of claim 4, wherein The axis of the drive shaft penetrates along the center of the flow path compartment, The opening and closing member is connected to the drive shaft, the exhaust gas reducing device characterized in that the reciprocating rotational movement between the open position and the closed position of the communication port. The method of claim 1, The air supply unit is rotatably connected between the engine and the opening and closing member so as to be interlocked with the rotational movement of the opening and closing member, and an air supply unit has a supply path for combustion gas, oxidant, fuel and air or reducing agent supplied into the filter. Exhaust gas reduction device, characterized in that. The method of claim 5, The drive shaft and the opening and closing member is provided in plurality, the exhaust gas reducing device, characterized in that for opening and closing the communication holes divided into equal parts of the area (flap) respectively. The method of claim 6, The axis of the drive shaft penetrates along the center of the flow path compartment, The opening and closing member, A first opening / closing member connected to the drive shaft, the first opening and closing member being reciprocally rotated to open and close the first communication port; And a second opening / closing member connected to the drive shaft and reciprocally rotated to open and close the second communication port. The method of claim 10, The first opening and closing member and the second opening and closing member is connected to a separate drive shaft, the exhaust gas reducing device, characterized in that the first communication port and the second communication port is independently reciprocating rotationally open and closed, respectively. . The method of claim 2, The flow path compartment and the opening and closing member are disposed on both side surfaces of the filter, And the control unit controls the driving unit so that the opening and closing members disposed on both sides of the filter are linked to open and close the communication port. The method of claim 1, The filter is exhaust gas reducing device, characterized in that provided with silicon carbide (SiC). The method of claim 1, The exhaust gas reducing device, characterized in that the filter is coated with an oxidation catalyst or a storage reduction catalyst. The method of claim 8, At least one of the opening and closing member and the air supply unit is provided with a combustion device for generating a high temperature combustion gas. The method according to claim 6 or 8, The switching member is provided with an ignition device for starting the combustion when the fuel and air is supplied to the opening and closing member. The method according to claim 6 or 8, Exhaust gas reduction device, characterized in that the opening and closing member is formed with at least one vent hole corresponding to 1 to 25% of the opening and closing member.

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