KR102255136B1 - Diesel particulate filter cleaning device and cleaning method - Google Patents

Abstract

The present invention relates to a cleaning apparatus for a direct-flame type exhaust gas reducer, capable of minimizing substrate damage within a short time which is around 10 minutes by injecting a direct heating catalyst into a DPF without the removal of the DPF while safely combusting and discharging carbon and ash deposited in a filter, and a cleaning method thereof. More specifically, the cleaning apparatus includes: an enclosed body having a caster installed on a bottom surface to be movable, having a digital pressure gauge and a vacuum gauge installed on a front side, and having a predetermined space therein; a heating catalyst container detachably mounted on an upper side of the enclosed body; an exhaust mounting hose connected from the inside of the enclosed body, and mounted on an exhaust manifold of a vehicle such that a heating catalyst of the heating catalyst container can be supplied; an intake mounting hose connected from the inside of the enclosed body, and mounted on an intake manifold of the vehicle to control an air amount; an adaptor for catalyst injection installed at an end of the exhaust mounting hose to be mounted suitably on the exhaust manifold different depending on the vehicle; and a throttle controller installed at an end of the intake mounting hose to control an intake air amount.

Description

Cleaning device of exhaust gas reduction device and its cleaning method {DIESEL PARTICULATE FILTER CLEANING DEVICE AND CLEANING METHOD}

The present invention relates to a cleaning device and a cleaning method of an exhaust gas reduction device, and more particularly, by directly injecting a heating catalyst into the DPF without removing the exhaust gas reduction device (hereinafter referred to as DPF). The present invention relates to a cleaning device of an exhaust gas reduction device and a cleaning method thereof capable of safely burning and discharging carbon and ash deposited in a filter while minimizing damage to light within a period of time.

The internal combustion engine, represented by gasoline and diesel, discharges exhaust gas discharged with the explosion of fuel, and the exhaust gas of strong pressure generates a loud noise like a race car without a muffler, so it bears the reduction of the output of ordinary cars. And put on a muffler.

Conventionally, only a muffler that simply lowers the pressure was installed, but in the case of diesel engines, not only carbon dioxide and carbon monoxide, but also nitrogen oxides and fine dust in the exhaust gas discharge up to 100 times more harmful substances than gasoline engines. On June 12, 2012, the International Cancer Research Institute (IARC) under the WHO) raised the diesel engine exhaust gas from the 2A class (presumed carcinogen) to the first class carcinogen.

As a result, ceramic and metal microtubes are formed in a honeycomb-shaped structure, and the microtubes are made in a cross section, so that a DPF (Diesel Particulate Filter) that filters particulate matter in the exhaust gas is installed and collected. When a certain amount of foreign matter collected, it was burned at a high temperature (65 degrees Celsius or higher) and discharged to the atmosphere.

In other words, the structure and principle of the DPF is to filter foreign substances, and if the filtered foreign substances accumulate inside, the exhaust gas and the heat of the post-injection are forced to burn them to remove them, and the accumulated foreign substances cause a difference between the pressure at the inlet and the outlet of the DPF. This prevents the engine's output from deteriorating. The principle is that when the pressure at the inlet of the DPF is above a certain value, the ECU (Electronic Control Unit) instructs the fuel to be injected afterwards, and the foreign substances collected in the DPF by the injected fuel It is to reduce the pressure difference between the inlet and outlet of the DPF by burning it and exhausting it.

However, when the vehicle runs at a low rpm and additionally injects fuel, it does not generate enough heat to burn foreign substances, or if the engine is repeatedly turned off after a short distance driving, the foreign substances gradually increase. In this case, in a short period of time. The DPF operates again, which injects more fuel, increases fuel economy, and reduces output.

Accordingly, the work of dissolving foreign substances such as soot, carbon, and ash, etc., was performed by passing chemicals inside.However, although the harsh chemicals clean well, there is a problem that causes environmental pollution and internal damage of DPF.

In addition, an example of a method and apparatus for removing carbon and ash from DPF is disclosed in Korean Patent Registration No. 10-1936125 (announced on January 29, 2019). Here, in order to remove the fixed impurities, there is an environmental problem in removing impurities by applying an impact with high-pressure air after washing and neutralizing in one device, and furthermore, there is an inconvenience of removing the DPF.

In addition, as another previously filed example, the contents disclosed in Korean Patent Registration No. 10-1770686 (announced on Aug. 23, 2017) include strong pneumatic pressure and water pressure to the exhaust port side of the DPF removed from the vehicle and stacked inside the DPF. In addition to the inconvenience of removing the DPF to remove particles, there is a problem in that air is discharged into the atmosphere and pollutants are discharged as it is.

Therefore, there is a desperate need for a cleaning device and method to reduce environmental pollution generated in the DPF cleaning process and facilitate work.

The present invention was conceived to solve the conventional problems as described above, and by directly injecting a heating catalyst into the DPF without removing the DPF, the carbon and ash deposited in the filter are minimized while minimizing damage to the light in a short period of time before and after 10 minutes. It is to provide a cleaning device and a cleaning method of a direct flame type exhaust gas reduction device capable of safely burning and discharging the lamp.

Another object of the present invention is to safely and quickly remove impurities accumulated in DPF to help exhaust and restore back pressure to recover output, reduce fuel, and protect the environment, as well as reduce exhaust gas that can help extend the life of the DPF. It is to provide a cleaning device and a cleaning method for the device.

As a technical means for achieving the above technical problem, a caster is installed to be movable on the bottom surface, a digital pressure gauge and a vacuum gauge are installed on the front side, and a case having a certain space inside, and on the top surface of the case A heating catalyst container that is detachable and mounted in the housing, and is connected from the inside of the housing, and is connected from the inside of the vehicle and an exhaust mounting hose mounted on the exhaust manifold side of the vehicle so that the heating catalyst of the heating catalyst container is supplied. An intake mounting hose mounted on the side of the intake manifold and controlling the amount of air, and an adapter for introducing a catalyst, which is installed at an end of the exhaust mounting hose and can be suitably mounted on the exhaust manifold different for each vehicle; and It is installed at the end of the intake mounting hose and includes a throttle controller capable of controlling the amount of intake air.

According to an embodiment of the present invention, the heating catalyst container may contain a mixture of normal-propyl alcohol, cyclohexane, n-butyl alcohol, and propane.

According to an embodiment of the present invention, the adapter for introducing the catalyst includes a cylindrical body having a through hole formed in the center, a first connector formed on one side of the cylindrical body and connected to the intake mounting hose, and the other side of the cylindrical body. It may include a second connector formed and mounted on the intake manifold.

According to an embodiment of the present invention, the throttle controller has a cylindrical throttle body in which the intake mounting hose is connected to the side, the open bottom is connected to the intake manifold side, and the open top surface is in the form of a cylinder. And, it is installed on the open upper surface of the throttle body, it may include an opening and closing plate that is rotated based on a point to adjust the amount of intake air according to the degree of opening and closing.

According to an embodiment of the present invention, the opening/closing plate includes a plurality of opening/closing holes formed along the circumferential direction with respect to the one point, and an auxiliary that is rotatably installed at the one point to selectively open and close the opening/closing hole. It may include an opening and closing plate.

As another technical means for achieving the above-described technical problem, an exhaust mounting hose connected from the enclosure is mounted on the exhaust manifold while the vehicle is started and the exhaust gas reduction device (DPF) is installed, Step (a) of mounting the intake mounting hose to the intake manifold via a throttle controller capable of adjusting the amount of intake air, maintaining the engine speed of the vehicle at 1200rpm ~ 1500rpm, and maintaining the temperature of the exhaust manifold at 190°C ~ Step (b) of preheating to 210°C, mounting a heating catalyst container to the housing, and introducing a catalyst of the heating catalyst container through the exhaust mounting hose (c), and the exhaust manifold through the catalyst A regeneration step (d) of burning and removing foreign substances accumulated in the filter of the DPF while raising the temperature of 700℃ to 900℃ and lowering the differential pressure sensor value of the DPF to 400 mbar or less, and a preset differential pressure of the DPF When the value is normalized, the step (e) of cooling the temperature of the DPF to 200° C. or less by controlling the amount of intake air through the opening and closing control of the throttle controller.

According to an embodiment of the present invention, prior to the step (a), after removing the connector from the exhaust gas recirculation device (EGR) of the vehicle, the step of completing warming up of the vehicle may be further included.

According to an embodiment of the present invention, it may be mounted on the exhaust manifold through an adapter for introducing a catalyst, which is installed at an end of the exhaust mounting hose in step (a).

According to an embodiment of the present invention, in step (c), the catalyst may be introduced at an atmospheric pressure of 18 to 22 bar through a vacuum gauge installed in the enclosure.

According to an embodiment of the present invention, in step (e), the throttle adjuster may be determined according to the displacement of the vehicle.

The cleaning device and the cleaning method of the exhaust gas reduction device according to the present invention can have the following effects,

First, it is possible to clean quickly with no stripping and direct flame method, and it is also quick to recover, thus extending the life of the DPF and minimizing the loss of social costs.

Second, since carbon or ash is burned and discharged, it can be very helpful in improving the environment.

Third, it is possible to improve the exhaust performance of the vehicle by increasing the cleaning effect.

Other aspects, features, and benefits as described above of certain preferred embodiments of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings.
1 is a perspective view of a cleaning apparatus of an exhaust gas reduction apparatus according to an embodiment of the present invention,
2 is a perspective view of an adapter for introducing a catalyst in the cleaning device of the exhaust gas reduction device according to an embodiment of the present invention,
3 is an exploded perspective view of the throttle controller in the cleaning device of the exhaust gas reduction device according to an embodiment of the present invention,
Figure 4 is a state diagram of use of the throttle adjuster in Figure 3,
5 is a flowchart of an exhaust gas cleaning method according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In describing the embodiments, descriptions of technical contents that are well known in the technical field to which the present invention pertains and are not directly related to the present invention will be omitted. This is to more clearly convey the gist of the present invention by omitting unnecessary description.

For the same reason, some elements in the accompanying drawings are exaggerated, omitted, or schematically illustrated. In addition, the size of each component does not fully reflect the actual size. The same reference numerals are assigned to the same or corresponding components in each drawing.

Advantages and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only these embodiments make the disclosure of the present invention complete, and the general knowledge in the technical field to which the present invention pertains. It is provided to completely inform the scope of the invention to the possessor, and the invention is only defined by the scope of the claims. The same reference numerals refer to the same elements throughout the specification.

Here, FIG. 1 is a perspective view of a cleaning apparatus of an exhaust gas reduction apparatus according to an embodiment of the present invention, and FIG. 2 is a perspective view of an adapter for introducing a catalyst in the cleaning apparatus of an exhaust gas reduction apparatus according to an embodiment of the present invention. 3 is an exploded perspective view of the throttle controller in the cleaning apparatus of the exhaust gas reduction device according to an embodiment of the present invention, FIG. 4 is a state diagram of the throttle controller in FIG. 3, and FIG. 5 is an exhaust gas according to an embodiment of the present invention. This is a flow chart of the gas cleaning method.

First, the exhaust gas reduction device (DPF) is an exhaust gas post-treatment device that collects, burns and removes fine soot particles from the exhaust gas of diesel vehicles, and reduces the combustion temperature of the fine soot particles for normal operation of the DPF. By raising the temperature of the exhaust gas, the combustion is regenerated.

However, since various foreign substances accumulate in the intake air and the combustion chamber during the exhaust gas recirculation process, when the operation rate increases, the combustion efficiency decreases, and fuel economy and performance may be deteriorated. Accordingly, periodic washing of the DPF is required, and accordingly, in the present invention, the washing operation can be performed without removing the DPF by a vehicle.

The cleaning device of the exhaust gas reduction device shown in FIG. 1 is largely attached to the enclosure 100, the digital pressure gauge 104 and the vacuum gauge 106 installed in the enclosure 100, and the enclosure 100. The heating catalytic container 110 to be used, the exhaust mounting hose 120 mounted on the exhaust manifold (not shown) side of the vehicle, and the intake mounting hose mounted on the intake manifold (not shown) side of the vehicle to control the amount of air It may include (140).

First, the housing 100 is made of a metal material in a rectangular shape with a space provided therein, and at least two to four casters 102 are installed on the bottom surface to facilitate movement.

As shown in Fig. 1, two are installed on the rear side of the bottom surface, and a handle is provided on the rear surface so that they can be dragged.

Further, it is chamfered to the front of the upper side of the housing 100 to form an oblique inclined surface, and a digital pressure gauge 104 and a vacuum gauge 106 may be installed on the inclined surface.

Each of the digital pressure gauge 104 and the vacuum gauge 106 may be provided with a knob to adjust the pressure and vacuum according to a preset value.

In addition, the heating catalyst container 110 may be installed on the upper surface of the housing 100 so as to be removable and mountable.

The heating catalyst container 110 is preferably in the same shape or size as household butane gas, and the capacity of the catalyst is sufficiently filled to clean one DPF.

Subsequently, the heating catalyst container 110 may be screwed to the housing 100 or may be the same as the mounting structure of the general request gas.

Here, since a widely used technology is employed for the mounting structure of the heating catalyst container 110, a separate description will be omitted.

The heating catalyst container 110 may be filled with a mixture of normal-propyl alcohol, cyclohexane, n-butyl alcohol, and propane.

Preferably, the content is about 95% of propane (dimethylmethane), 2% of n-butyl alcohol and 2% of n-butyl alcohol, and about 1% of cyclohexane may be included.

Meanwhile, an exhaust mounting hose 120 mounted on the exhaust manifold side of the vehicle may be installed in the housing 100 to supply the heating catalyst of the heating catalyst container 110.

The exhaust mounting hose 120 is internally connected to the heating catalyst container 110, is installed to a certain length, and is mounted on the exhaust manifold of the vehicle.

In addition, an end of the exhaust mounting hose 120 may be mounted through an adapter for introducing a catalyst 130 so that it may be appropriately mounted on an exhaust manifold having a different shape for each vehicle.

As shown in FIG. 2, the adapter 130 for injection of the catalyst is made of a metal material, and a cylindrical body 132 having a through hole having a predetermined size in the center thereof is formed along the length direction, and to one side of the cylindrical body 132. It may be composed of a first connector 134 connected to the intake mounting hose 140 and a second connector 136 formed on the other side of the cylindrical body 132 and mounted on the intake manifold.

The first connector 134 and the second connector 136 are formed with a screw thread to enable screw fastening. In particular, the second connector 136 has a size suitable for this because the size of the second connector 136 is different for each vehicle.

In addition, the intake mounting hose 140 installed in the enclosure 100, such as the exhaust mounting hose 120, is internally connected to the enclosure 100, and is installed to a predetermined length to be mounted on the intake manifold of the vehicle.

Moreover, the end of the intake mounting hose 140 may be mounted on the intake manifold via a throttle controller 150 capable of adjusting the amount of intake air.

The throttle controller 150 is made of a heat-resistant material in a cylindrical shape with open upper and lower sides, and a cylindrical throttle body 152 into which air is introduced is provided, and the intake mounting hose 140 is placed on the side of the throttle body 152. It is connected, and it is connected to the intake manifold side with an open lower surface.

In addition, an opening and closing plate 154 capable of adjusting the amount of intake air may be installed on the opened upper surface.

The opening/closing plate 154 may be similar to or somewhat smaller than the upper surface diameter of the throttle body 152 in the shape of a thin plate made of metal.

The opening/closing plate 154 is installed to be rotatable through a point 155 which is screwed so as to be rotatable to any one of the upper surface thickness portions of the throttle body 152, and based on the one point 155 The degree of opening of the throttle body 152 may be determined by the rotation of the opening and closing plate 154.

Furthermore, a plurality of opening and closing holes 156 are formed in the opening and closing plate 154 along the circumferential direction based on the one point 155, and one point ( An auxiliary opening/closing plate 157 may be further installed so as to be rotatable from 155.

Accordingly, the degree of opening of the throttle body 152 is controlled through the opening/closing plate 154, and a finer amount of air can be adjusted with the auxiliary opening/closing plate 157 on the opening/closing plate 154.

Meanwhile, a storage box 108 provided with a handle to accommodate various parts or equipment may be installed on the front part of the enclosure 100.

A cleaning method using the cleaning device of the exhaust gas reduction device according to the present invention having the above configuration will be described with reference to FIG. 5.

When the vehicle is turned on and the exhaust gas reduction device (DPF) is installed, the exhaust mounting hose connected from the enclosure is mounted on the exhaust manifold, and the intake mounting hose is mediated by a throttle regulator capable of adjusting the amount of intake air. (A) mounting the furnace on the intake manifold, maintaining the engine rotation speed of the vehicle at 1200 rpm to 1500 rpm, and preheating the temperature of the exhaust manifold to 190 °C to 210 °C, and the enclosure (C) mounting a heating catalyst container in the heating catalyst container and introducing the catalyst agent in the heating catalyst container through the exhaust mounting hose, and raising the temperature of the exhaust manifold to 700°C to 900°C through the catalyst agent, and the Regeneration step (d) in which the DPF differential pressure sensor value drops to 400 mbar or less by burning and removes foreign matter deposited on the filter of the DPF, and the value measured by the DPF differential pressure sensor becomes 400 mbar or less. When normalized, the step (e) of cooling the temperature of the DPF to 200° C. or less by controlling the amount of intake air through the opening/closing control of the throttle controller.

In the following, each step will be described in more detail, since the washing operation is performed without removing the DPF, it may be desirable to perform it in a safe place with relatively no risk of fire.

First, at the end of the exhaust muffler of the vehicle, the state of exhaust emission is visually checked, and the overall state of the DPF is checked using a vehicle fault diagnosis scanner (not shown).

For example, it is required to check various temperature data, differential pressure, accumulation amount, EGR operation, ACV operation, and engine oil pollution degree.

Then, before the full-scale step (a), after removing the connector from the exhaust gas recirculation system (EGR) of the vehicle, the warming up of the vehicle is completed.

And according to step (a), while maintaining the starting of the vehicle that has finished warming up, the catalyst for inputting a catalyst suitable for the vehicle is connected to the exhaust mounting hose 120, mounted on the exhaust manifold, and then intake air. The mounting hose 140 is mounted on the intake manifold through the throttle controller 150.

And according to step (b), the rpm of the vehicle is raised for smooth regeneration, so that the engine speed is maintained at 1200 rpm to 1500 rpm, and the temperature of the exhaust manifold is preheated to 190 °C to 210 °C.

A heating catalyst container 110 is mounted on the upper surface of the enclosure 100 while the preset temperature and engine rotation speed are maintained at 1200rpm~1500rpm, and the catalyst in the heating catalyst container 110 is passed through the exhaust mounting hose 120. Step (c)

delete

Practical regeneration step (d) in which the temperature of the exhaust manifold is raised to 700℃~900℃ according to the input of the catalyst, and the value of the differential pressure sensor of the DPF drops to 400mbar or less by burning and removing foreign substances accumulated in the filter of the DPF. Will go through.

That is, in step (d), washing is performed to burn and remove impurities such as soot, carbon, and ash that have been fixed to the DPF.

Subsequently, as the impurities accumulated in the DPF are removed, the pressure difference between the inlet and the outlet of the DPF is reduced and the differential pressure is normalized, and the amount of intake air is adjusted through the throttle controller 150 according to the exhaust amount of the vehicle.

Here, the amount of intake air is increased by rotating the opening/closing plate 154 based on a point 155 of the throttle controller 150, and furthermore, the auxiliary opening/closing plate 157 on the opening/closing plate 154 is also a point 155. While rotating on the basis of, the opening/closing hole 156 is selectively opened and closed to control the amount of intake air.

Therefore, by controlling the amount of air through the throttle controller 150, the temperature of the DPF is cooled from 700°C to 900°C to 200°C or less. Step (e)

In addition, the power of the enclosure 100 is turned off, and the exhaust mounting hose 120 mounted on the exhaust manifold and the intake mounting hose 140 mounted on the intake manifold are removed.

In addition, the heating catalyst container 110 is also removed.

Subsequently, when cooling to the appropriate temperature is completed, the connector of the exhaust gas recirculation device (EGR), which was removed again, is connected, and the learning value reset, initialization, and parts replacement reset are performed using the vehicle fault diagnosis scanner.

According to the above, it is possible to wash in a short time by using a non-detaching and direct flame method, and it is also possible to recover quickly, thereby extending the life of the DPF and minimizing the loss of social costs.

In addition, since carbon or ash is burned and discharged, it can be very helpful in improving the environment.

In addition, it is possible to improve the exhaust performance of the vehicle by increasing the cleaning effect.

Accordingly, the present invention includes a program including a code for implementing the apparatus or method described in the claims of the present specification, and a storage medium readable by a machine (such as a computer) storing such a program. Further, such a program may be transferred electronically through any medium, such as a communication signal transmitted through a wired or wireless connection, and the present invention suitably includes equivalents thereto.

The embodiments of the present invention disclosed in the present specification and drawings are merely provided for specific examples to easily explain the technical content of the present invention and to aid understanding of the present invention, and are not intended to limit the scope of the present invention. In addition, the embodiments according to the present invention described above are merely exemplary, and those of ordinary skill in the art will understand that various modifications and equivalent ranges of embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be determined by the following claims.

100: housing 102: caster
104: digital pressure gauge 106: vacuum gauge
108: storage box 110: heating catalyst container
120: exhaust mounting hose 130: adapter for introducing catalyst
132: cylindrical body 134, 136: first, second connector
140: intake mounting hose 150: throttle regulator
152: throttle body 154: opening and closing plate
155: one point 156: opening and closing hole
157: auxiliary opening and closing plate

Claims (10)

Casters are installed to be movable on the floor, digital pressure gauges and vacuum gauges are installed on the front side, and an enclosure with a certain space inside,
A heating catalyst container that is removed and mounted on the upper surface of the housing,
An exhaust mounting hose connected from the inside of the housing and mounted on the exhaust manifold side of the vehicle to supply the heating catalyst of the heating catalyst container, and
An intake mounting hose connected from the inside of the enclosure and mounted on the intake manifold side of the vehicle to control the amount of air,
An adapter for introducing a catalyst, which is installed at an end of the exhaust mounting hose and can be mounted on the exhaust manifold that is different for each vehicle;
A throttle controller installed at the end of the intake mounting hose and capable of adjusting the amount of intake air,
Cleaning device of an exhaust gas reduction device comprising a.
The method of claim 1,
In the heating catalyst container,
A cleaning device for an exhaust gas reduction device containing a mixture of normal-propyl alcohol, cyclohexane, n-butyl alcohol, and propane. The method of claim 1,
The adapter for introducing the catalyst,
A cylindrical body with a through hole formed in the center,
A first connector formed on one side of the cylindrical body and connected to the intake mounting hose,
A second connector formed on the other side of the cylindrical body and mounted on the intake manifold,
Cleaning device of the exhaust gas reduction device comprising a.
The method of claim 1,
The throttle adjuster,
The intake mounting hose is connected to the side, the open lower surface is connected to the intake manifold side, and the open upper surface is a cylindrical throttle body through which air is introduced,
An opening/closing plate installed on the open upper surface of the throttle body and rotating based on a point to adjust the amount of intake air according to the degree of opening and closing,
Cleaning device of the exhaust gas reduction device comprising a.
The method of claim 4,
In the opening and closing plate,
A plurality of opening and closing holes formed along the circumferential direction based on the one point,
An auxiliary opening/closing plate that is rotatably installed at the one point to selectively open and close the opening/closing hole,
Cleaning device of the exhaust gas reduction device comprising a.
When the vehicle is turned on and the exhaust gas reduction device (DPF) is installed, the exhaust mounting hose connected from the enclosure is mounted on the exhaust manifold, and the intake mounting hose is mediated by a throttle regulator capable of adjusting the amount of intake air. Mounting the furnace on the intake manifold (a);
(B) maintaining the engine speed of the vehicle at 1200 rpm to 1500 rpm and preheating the temperature of the exhaust manifold to 190 °C to 210 °C;
(C) mounting a heating catalyst container in the housing and introducing a catalyst from the heating catalyst container through the exhaust mounting hose;
Regeneration step (d) of raising the temperature of the exhaust manifold through the catalyst to 700°C to 900°C and removing foreign substances deposited on the filter of the DPF by burning while the differential pressure sensor value of the DPF drops to 400 mbar or less. ;
(E) cooling the temperature of the DPF to 200° C. or less by adjusting the amount of intake air through the opening and closing control of the throttle controller when the value measured by the differential pressure sensor of the DPF becomes less than 400 mbar and is normalized;
Cleaning method of an exhaust gas reduction device comprising a.
The method of claim 6,
Before step (a),
Completing warm-up of the vehicle after removing the connector from the exhaust gas recirculation device (EGR) of the vehicle;
Cleaning method of the exhaust gas reduction device further comprising a.
The method of claim 6,
In step (a),
A cleaning method for an exhaust gas reduction device mounted on the exhaust manifold via an adapter for introducing a catalyst installed at an end of the exhaust mounting hose.
delete The method of claim 6,
In step (e),
The throttle adjuster is a cleaning method of an exhaust gas reduction device that is determined according to an exhaust amount of the vehicle.

Images