KR20170069478A - A control method of hci module and a control apparatus thereof - Google Patents

Abstract

The present invention relates to a method and apparatus for controlling an HCI module. A control method of an HCI module according to the present invention includes a DPF regeneration step (S100) of injecting fuel to a front end of a DOC and burning and removing PM collected in the DPF; A first regenerating / discharging condition determining step (S200) of determining, after the DPF regeneration step (S100), whether the temperature of the front end of the DOC is less than a predetermined reference temperature (a); If the temperature of the front end of the DOC is equal to or higher than the predetermined reference temperature (a) in the first regenerating / discharging condition determining step (S200), a DPF regeneration stopping condition determining step of determining whether the engine RPM is less than a predetermined idle RPM (S300); A DPF regeneration completion determination step (S400) for determining whether the DPF regeneration rate is equal to or greater than a predetermined reference rate (c) when the engine RPM is equal to or greater than the predetermined idle RPM (b) in the DPF regeneration stopping condition determination step (S300); And the DPF regeneration rate for preventing the caulking of the HCI nozzle 400 when the DPF regeneration rate is equal to or greater than the predetermined reference rate c in the DPF regeneration completion determination step S400, And an ending step S500. According to the present invention, it is possible to increase the reliability of the vehicle by injecting residual fuel inside the injection pipe in a spray form using compressed air in a section in which fuel injection is stopped (for example, an idle state). In addition, the clogging of the HCI nozzle can be prevented, and the durability can be increased while maintaining the performance of the HCI nozzle.

Description

TECHNICAL FIELD [0001] The present invention relates to a control method and apparatus for a HCI module,

The present invention relates to a HCI module control method and apparatus, and more particularly, to a HCI module control method and apparatus capable of increasing durability while maintaining the performance of an HCI nozzle.

PM (Particulate Material) and NOx among exhaust gases of diesel engines are substances that are reduced by catalytic devices at the downstream of engine exhaust due to global exhaust gas regulations. Among them, PM is collected by DPF (Diesel Particulate Filter), and the amount of PM released into the atmosphere is reduced.

In order to maintain the purifying performance of the DPF serving as above, the DPF is regenerated periodically or when a predetermined amount of PM is collected. That is, PM captured in the DPF at a high temperature is burned and removed. At this time, the high temperature is obtained by injecting HC (Hydrocarbon), ie, diesel fuel, into the front of the DOC (Diesel Oxidation Catalyst) to cause an oxidation reaction in the DOC.

As described above, the apparatus for injecting diesel fuel at the front of the DOC is composed of an HCI (Hydrocarbon Injection) module and an HCI nozzle. The HCI module receives diesel fuel from the engine of the vehicle, receives the compressed air from the vehicle's air tank, and transmits the compressed air to the HCI nozzle (see FIG. 1). In the HCI nozzle, the diesel fuel must be injected in the form of droplets to generate a high temperature for the PM combustion in the DOC (see FIG. 2).

Also, compressed air removes diesel fuel remaining at the ends of the injection pipe and the HCI nozzle between the HCI module and the HCI nozzle after the regeneration, and cools the injection pipe and the HCI nozzle heated by the exhaust heat. Such compressed air is supplied to the HCI nozzle in i) immediately before regeneration, ii) immediately after regeneration, and iii) in the non-regeneration interval. Here, the termination of regeneration means a regeneration completion state in which the PM is removed to a certain amount or less in the DPF, or a regeneration stop state in which the DOC front end temperature is out of the catalyst activation temperature at which the regeneration temperature falls below a predetermined temperature.

However, there is a period in which the diesel fuel injection is stopped in the HCI nozzle although the regeneration is not terminated during the running of the vehicle, such as i) just before the start of the regeneration, ii) immediately after the regeneration end, and iii) in the non-regeneration period. For example, the engine is in an idle state due to a signal stop or the like. In other words, since the PM is not removed under regeneration during the regeneration and the exhaust gas flow is not smooth in the idle state even when the DOC shear temperature is sufficiently high, the fuel injection valve is blocked in the HCI module in order to prevent the fuel from becoming rich in the front of the DOC So that fuel injection from the nozzle is stopped.

In this case, the residual fuel remaining in the injection pipe between the HCI module and the HCI nozzle drops in droplet form at the end of the HCI nozzle by its own weight (see FIG. 3). Accordingly, the droplet-shaped fuel is accumulated on the bottom of the exhaust pipe, and if the exhaust gas is discharged from the engine at a high temperature, it causes a fire inside the exhaust pipe.

Further, when the residual fuel discharge is completed, the exhaust gas flows into the HCI nozzle due to the difference between the pressure inside the injection pipe and the exhaust pipe. Accordingly, there is a problem that coking that clogs the HCI nozzle occurs due to a specific component existing in the exhaust gas (see FIG. 4), which hinders injection of diesel fuel in the HCI nozzle.

Patent Registration No. 10-438095 (2014.08.29)

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a fuel injection system for an internal combustion engine, which uses compressed air in a section where fuel injection is stopped The present invention also provides an HCI module control method and apparatus capable of preventing the exhaust gas from being adversely introduced into the nozzle when the residual fuel is exhausted.

A control method of an HCI module according to the present invention includes a DPF regeneration step (S100) of injecting fuel to a front end of a DOC and burning and removing PM collected in the DPF; A first regenerating / discharging condition determining step (S200) of determining, after the DPF regeneration step (S100), whether the temperature of the front end of the DOC is less than a predetermined reference temperature (a); If the temperature of the front end of the DOC is equal to or higher than the predetermined reference temperature (a) in the first regenerating / discharging condition determining step (S200), a DPF regeneration stopping condition determining step of determining whether the engine RPM is less than a predetermined idle RPM (S300); A DPF regeneration completion determination step (S400) for determining whether the DPF regeneration rate is equal to or greater than a predetermined reference rate (c) when the engine RPM is equal to or greater than the predetermined idle RPM (b) in the DPF regeneration stopping condition determination step (S300); And the DPF regeneration rate for preventing the caulking of the HCI nozzle 400 when the DPF regeneration rate is equal to or greater than the predetermined reference rate c in the DPF regeneration completion determination step S400, And an ending step S500.

The DPF regeneration step S100 is to close the fuel injection valve 240 and the fuel shutoff valve 230 and to open the air injection valve 250 for a predetermined cooling time t1 to cool the injection tube 300 Step S110: After the cooling step S110, the fuel injection valve 240 and the fuel shutoff valve 230 are opened, the air injection valve 250 is closed, and the fuel is charged into the injection pipe 300 (S120); And a DPF regeneration start step (S130) of repeatedly opening and closing the fuel injection valve (240) at a predetermined first reference period (T1) after the charging step (S120).

The control method of the HCI module is characterized in that the DPF regeneration end step (S500) is performed when the temperature of the front end of the DOC is less than a predetermined reference temperature (a) in the first regenerating / discharging condition determining step (S200) .

The control method of the HCI module is characterized in that the DPF regeneration start step (S130) is performed when the DPF regeneration rate is less than the predetermined reference rate (c) in the step of determining completion of regeneration of the DPF (S400).

The DPF regeneration termination step S500 may include closing the fuel injection valve 240 and the fuel shutoff valve 230 and repeatedly opening and closing the air injection valve 250 by a predetermined reference number n, (S510) of opening and closing the air injection valve (250) repeatedly and opening the air injection valve (250) for a predetermined removal time (t2) to remove fuel in the injection pipe (300); And the air injection valve 250 is repeatedly opened and closed at a predetermined second reference period T2 to prevent the HCI nozzle 400 from being caulked, And a nozzle holding step (S520).

In the control method of the HCI module, when the engine RPM is less than the predetermined idle RPM (b) in the DPF regeneration stopping condition determination step S300, the fuel injection valve 240 is shut off and the fuel shutoff valve 230 is closed. And a DPF regeneration suspending step (S600) of opening and closing the air injection valve (250) repeatedly at a predetermined opening time (d) and a predetermined closing time (e).

The control method of the HCI module includes a second regenerating / exiting condition determining step (S700) for determining whether the temperature of the front end of the DOC is lower than the predetermined reference temperature (a) after the DPF regeneration stopping step (S600) .

In the control method of the HCI module, when the temperature of the front end of the DOC is less than the predetermined reference temperature (a) in the second regenerating / discharging condition determining step S700, the DPF regeneration is terminated (S500) .

The control method of the HCI module determines whether the engine RPM is equal to or greater than a preset start RPM (f) when the temperature of the front end of the DOC is equal to or higher than the preset reference temperature (a) in the second regenerating / And a DPF regeneration restoration condition determination step (S800).

In the control method of the HCI module, when the engine RPM is equal to or greater than the predetermined start RPM (f) in the DPF regeneration start condition determination step (S800), the step of cooling the injection pipe (S110) is performed .

In the control method of the HCI module, when the engine RPM is less than the preset start RPM (f) in the DPF regeneration start condition determination step S800, the DPF regeneration stop step S600 is performed.

The control method of the HCI module is stored in the storage medium according to the present invention.

The controller of the HCI module according to the present invention includes the storage medium 100; A fuel line 210 to which fuel is supplied from the engine E and an air line 220 to which compressed air is supplied from the air tank A, An HCI module 200 to which a fuel shutoff valve 230 and a fuel injection valve 240 are mounted and an air injection valve 250 is mounted on the air line 220; A spray pipe 300 extending from a junction point of the fuel line 210 and the air line 220 and communicating the HCI module 200 with the HCI nozzle 400; The HCI nozzle 400 injecting fuel or compressed air to the front end of the DOC; A temperature sensor 500 for measuring the temperatures of the front and rear ends of the DOC; A differential pressure sensor 600 installed at the front and rear ends of the DPF to measure the amount of PM deposited inside the DPF; And the control method of the HCI module stored in the storage medium 100 based on the temperature of the front end of the DOC, the RPM of the engine, and the amount of PM deposited inside the DPF, And a control unit 700 for controlling opening and closing of the fuel injection valve 240 and the air injection valve 250.

As described above, according to the present invention, the residual fuel inside the injection pipe is injected in the form of spray using compressed air in a section in which fuel injection is stopped (for example, an idle state) have.

In addition, the clogging of the HCI nozzle can be prevented, and the durability can be increased while maintaining the performance of the HCI nozzle.

1 is a view for explaining an HCI module and an HCI nozzle;
Figs. 2 to 4 are diagrams for explaining problems of the prior art; Fig.
5 is a conceptual diagram of a control method of an HCI module according to the present invention.
6 to 9 are flowcharts of a method of controlling an HCI module according to the present invention.
10 is a block diagram of a control apparatus for an HCI module according to the present invention.

It is to be understood that the words or words used in the present specification and claims are not to be construed in a conventional or dictionary sense and that the inventor can properly define the concept of a term to describe its invention in the best way And should be construed in accordance with the meaning and concept consistent with the technical idea of the present invention. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and are not intended to represent all of the technical ideas of the present invention. Therefore, various equivalents It should be understood that water and variations may be present. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 5 is a conceptual diagram of a control method of an HCI module according to the present invention, and FIGS. 6 to 9 are flowcharts of a control method of an HCI module according to the present invention. 5 to 10, a method of controlling an HCI module according to the present invention includes a DPF regeneration step S100, a first regeneration exit condition determination step S200, a DPF regeneration stopping condition determination step S300, A completion judgment step S400 and a DPF regeneration end step S500.

The DPF regeneration step S100 is a step of injecting fuel to the front end of the DOC and burning PM collected in the DPF to be removed. The DPF regeneration step S100 includes a step S110 of cooling the injection pipe 300, a step S120 of filling the fuel, and a DPF regeneration start step S130.

In the step S110 of cooling the injection pipe 300, the fuel injection valve 240 and the fuel shutoff valve 230 are closed, and the air injection valve 250 is opened for a predetermined cooling time t1, 300). This is because, when the injection pipe 300 is at a high temperature, the fuel injected for DPF regeneration can form sludge, thereby preventing proper fuel injection. At this time, the predetermined cooling time t1 may be set to about 15 seconds, but the present invention is not limited thereto and may be set differently depending on the type of vehicle, the temperature of the injection pipe, and the like.

After the cooling step S110, the fuel injection valve 240 and the fuel shutoff valve 230 are opened and the air injection valve 250 is closed in step S120, Thereby filling the interior of the capillary 300 with fuel. That is, in order to facilitate fuel injection in the HCI nozzle 400 during the DPF regeneration, the fuel is filled in the injection pipe 300 before injecting the fuel to the front end of the DOC in the HCI nozzle 400.

In the DPF regeneration start step S130, after the charging step S120, the fuel injection valve 240 is repeatedly opened and closed at a predetermined first reference period T1. Accordingly, the fuel is injected from the HCI nozzle 400 to the front end of the DOC, thereby raising the temperature of the exhaust gas through the oxidation reaction in the DOC and burning the PM trapped in the DPF. The predetermined first reference period T1 may be set differently according to the type of the vehicle or the like.

The first regeneration condition determining step S200 determines whether the temperature of the front end of the DOC is less than a predetermined reference temperature a. If the temperature of the front end of the DOC is less than the preset reference temperature (a), the DPF regeneration end step (S500) is performed. The predetermined reference temperature (a) is the lowest catalyst activation temperature of the DOC, and may be set differently depending on the type of the DOC. That is, when the temperature of the front end of the DOC is less than the predetermined reference temperature (a), the DOC is not activated, so that regeneration of the DPF does not occur. Therefore, even if the fuel is injected to the front end of the DOC, the injected fuel is not oxidized and is discharged to the atmosphere as it is, which may cause a problem of fuel consumption deterioration and air pollution. In order to prevent this, a condition in which the temperature of the front end of the DOC is less than a predetermined reference temperature (a) is set as a regeneration / escape condition of the DPF.

The DPF regeneration stopping condition determination step S300 is a step of determining whether the engine RPM is less than the predetermined idle RPM (b) when the temperature of the front end of the DOC is equal to or higher than the preset reference temperature a. That is, during the running of the vehicle, it is determined that the regeneration is not terminated but the period in which the diesel fuel injection is stopped in the HCI nozzle 400 (for example, the engine is in the idle state due to a signal stop). Regeneration of the DPF is inefficient because the exhaust gas flow is not smooth even when the DOC shear temperature is sufficiently high in the engine idle state. Therefore, in this case, in order to prevent the fuel from being injected into the front end of the DOC, the DPF regeneration stop condition determination step (S300) is performed. The predetermined idle RPM (b) is an RPM in the idle state of the vehicle, and may be set differently according to the type of vehicle or the like.

The DPF regeneration completion judgment step (S400) is a step of judging whether the DPF regeneration rate is equal to or greater than a predetermined reference rate (c) when the engine RPM is equal to or greater than the predetermined idle RPM (b). That is, when the regeneration of the DPF is completed, there is almost no PM to be burned. Therefore, there is no need to inject fuel to the front end of the DOC, and only fuel efficiency is deteriorated at the front end of the DOC. Therefore, in order to prevent this, it is judged whether or not the DPF is completely regenerated. In the DPF regeneration completion judgment step (S400), the DPF regeneration rate can be calculated from the amount of PM trapped in the DPF before the step S100 and the amount of the PM after the steps S100 to S300. Further, the amount of PM is measured by the differential pressure sensor 600 mounted at the front and rear of the DPF. At this time, the predetermined reference ratio (c%) may be set differently according to the type of the vehicle or the like.

If the DPF regeneration rate is less than the preset reference rate c in the DPF regeneration completion determination step S400, the DPF regeneration start step S130 is performed again. That is, the condition for the DPF regeneration is satisfied but the regeneration of the DPF is insufficient, so that the DPF regeneration is continuously performed.

In the DPF regeneration end step S500, when the DPF regeneration rate is equal to or higher than the predetermined reference ratio c, the fuel inside the injection pipe 300 is removed to prevent caulking of the HCI nozzle 400. [ To this end, the DPF regeneration termination step S500 carries out the step S510 of removing the fuel inside the injection pipe 300 and the HCI nozzle maintenance step S520. That is, the residual fuel inside the injection pipe 300 is accumulated on the bottom of the exhaust pipe in the form of a droplet to cause a fire inside the exhaust pipe, or the exhaust gas flows into the HCI nozzle to prevent the clogging of the HCI nozzle.

The step S510 of removing the fuel inside the injection pipe 300 closes the fuel injection valve 240 and the fuel shutoff valve 230 and repeats the air injection valve 250 by a predetermined reference number n And repeatedly opens and closes the air injection valve 250, and then opens the air injection valve 250 for a predetermined removal time t2. Accordingly, the residual fuel inside the injection pipe 300 is exhausted from the HCI nozzle 400 to the front end of the DOC by the compressed air. At this time, the predetermined reference number n may be set to 20, and the predetermined removal time t2 may be set to 60 seconds, but the present invention is not limited thereto and may be set differently depending on the type of vehicle or the like have.

In the HCI nozzle maintenance step S520, after the step S510 of removing the fuel in the injection pipe, the air injection valve 250 is moved to a predetermined second reference period T2 to prevent caution of the HCI nozzle 400 ). The predetermined second reference period T2 may be set to 120 seconds, and the open time may be set to 5 seconds, but it is not limited thereto and may be set differently depending on the type of vehicle and the like.

In the DPF regeneration suspending step S600, when the engine RPM is less than the predetermined idle RPM (b) in the DPF regeneration stopping condition determining step S300, the fuel injection valve 240 is shut off and the fuel shutoff valve 230 And the air injection valve 250 is repeatedly opened and closed at a predetermined opening time d and a predetermined closing time e. That is, the state of the current vehicle is in a state in which the regeneration is not terminated but the diesel fuel injection is stopped in the HCI nozzle 400 (for example, the engine is in an idle state due to a signal stop). The DPF regeneration is inefficient because the exhaust gas flow is not smooth even when the DOC shear temperature is sufficiently high in the engine idle state, and in this case, it is necessary to prevent the fuel from being injected into the front end of the DOC.

Therefore, in the DPF regeneration suspending step (S600), the fuel injection valve 240 is closed and the fuel shutoff valve 230 is opened. Even if the fuel cutoff valve 230 is opened, the fuel injection valve 240 is closed, so that the fuel is no longer injected into the injection pipe 300. Also, since the air injection valve 250 is repeatedly opened and closed (i.e., purged), the residual fuel inside the injection pipe 300 is discharged to the front end of the DOC in spray form. Therefore, accumulation of the residual fuel inside the injection tube 300 in the form of droplets on the bottom of the exhaust pipe can be prevented. In addition, since the air injection valve 250 is repeatedly opened and closed (i.e., purged), it is possible to prevent the exhaust gas from flowing into the HCI nozzle 400 and to prevent the exhaust gas from flowing into the injection pipe 300 and the HCI nozzle 400 The cooling phenomenon can be prevented.

The predetermined open time d and the predetermined closing time e prevent the residual fuel in the injection pipe 300 from being discharged to the front end of the DOC in a spray form to prevent the exhaust gas from flowing into the HCI nozzle 400 And an optimal opening time and closing time for sufficiently cooling the injection tube 300 and the HCI nozzle 400 so as to prevent the coking phenomenon. Therefore, the predetermined opening time d and the predetermined closing time e may be experimentally measured, and may be set differently depending on the type of vehicle or the like.

The second regenerative escape condition determination step S700 is a step of determining whether the temperature of the front end of the DOC is less than the preset reference temperature a after the DPF regeneration stop step S600. The preset reference temperature (a) may be set to a minimum catalyst activation temperature of the DOC, as in the first regeneration / exit condition determination step (S200), depending on the type of the DOC. If the temperature of the front end of the DOC is less than the preset reference temperature (a), the step of terminating the DPF regeneration is performed (S500). That is, when the temperature of the front end of the DOC is less than the predetermined reference temperature (a), the DOC is not activated, so that regeneration of the DPF does not occur. Therefore, even if the fuel is injected to the front end of the DOC, the injected fuel is not oxidized and is discharged to the atmosphere as it is, which may cause a problem of fuel consumption deterioration and air pollution. In order to prevent this, a condition in which the temperature of the front end of the DOC is less than a predetermined reference temperature (a) is set as a regeneration / escape condition of the DPF.

In the DPF regeneration condition determination step S800, when the temperature of the front end of the DOC is equal to or greater than the preset reference temperature a, the engine RPM is determined as the predetermined starting RPM (f) Or more. That is, when the vehicle is no longer in the idle state, the flow of the exhaust gas is sufficiently smooth, so that the stopped DPF regeneration can be resumed. Accordingly, it is determined whether the engine RPM is equal to or greater than a predetermined start RPM (f), and it is determined whether or not the vehicle has escaped the idle state. The predetermined starting RPM (f) is an engine RPM when the vehicle starts to move in the idle state, and may be set differently according to the type of the vehicle or the like.

If the engine RPM is equal to or greater than the predetermined start RPM (f) in the DPF regeneration start condition determination step S800, a step S110 of cooling the injection pipe to resume the DPF regeneration is performed. This is because the vehicle has escaped the idle state, so that the DPF regeneration can be performed from the beginning.

If the engine RPM is less than the predetermined start RPM (f) in the DPF regeneration start condition determination step S800, the DPF regeneration stop step S600 is performed so as to maintain the regeneration stop state of the DPF. This is to prevent the DPF from being restarted because the vehicle has not yet escaped the idle state.

10 is a block diagram of a control apparatus for an HCI module according to the present invention. Referring to FIG. 10, the controller of the HCI module according to the present invention includes a storage medium 100, an HCI module 200, a spray tube 300, an HCI nozzle 400, a temperature sensor 500, 600 and a control unit 700.

The control method of the HCI module is stored in the storage medium 100.

The HCI module 200 includes a fuel line 210 to which fuel is supplied from the engine E and an air line 220 to which compressed air is supplied from the air tank A, A fuel shutoff valve 230 and a fuel injection valve 240 are sequentially mounted from the side of the air injection valve E and an air injection valve 250 is mounted on the air line 220.

The injection pipe 300 extends from the merging point of the fuel line 210 and the air line 220 to communicate the HCI module 200 and the HCI nozzle 400.

The HCI nozzle 400 injects fuel or compressed air to the front end of the DOC, and the temperature sensor 500 measures the temperatures before and after the DOC. The differential pressure sensor 600 is mounted on the front and rear ends of the DPF, And measures the amount of PM deposited inside the DPF.

The control unit 700 controls the amount of PM accumulated in the DPF according to the control method of the HCI module stored in the storage medium 100, based on the temperature of the front end of the DOC, the RPM of the engine, (230), the fuel injection valve (240), and the air injection valve (250).

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory only and are not restrictive of the invention, as claimed, and will be fully understood by those of ordinary skill in the art. The present invention is not limited thereto. It will be apparent to those skilled in the art that various substitutions, modifications and variations are possible within the scope of the present invention, and it is obvious that those parts easily changeable by those skilled in the art are included in the scope of the present invention .

100 storage medium
200 HCI module
210 fuel line
220 Airline
230 Fuel shutoff valve
240 Fuel injection valve
250 air injection valve
300 minutes
400 HCI Nozzle
500 temperature sensor
600 differential pressure sensor
700 controller

Claims (16)

A DPF regeneration step (S100) in which fuel is injected into a front end of the DOC to burn and remove PM collected in the DPF;
A first regenerating / discharging condition determining step (S200) of determining, after the DPF regeneration step (S100), whether the temperature of the front end of the DOC is less than a predetermined reference temperature (a);
If the temperature of the front end of the DOC is equal to or higher than the predetermined reference temperature (a) in the first regenerating / discharging condition determining step (S200), a DPF regeneration stopping condition determining step of determining whether the engine RPM is less than a predetermined idle RPM (S300);
A DPF regeneration completion determination step (S400) for determining whether the DPF regeneration rate is equal to or greater than a predetermined reference rate (c) when the engine RPM is equal to or greater than the predetermined idle RPM (b) in the DPF regeneration suspension condition determination step (S300); And
If the DPF regeneration rate is equal to or higher than the predetermined reference rate c in the DPF regeneration completion determination step S400, the DPF regeneration ending process for removing the fuel in the injection pipe 300 and preventing the caulking of the HCI nozzle 400 Step S500;
The method comprising the steps of: The method according to claim 1,
The DPF regeneration step S100 is to close the fuel injection valve 240 and the fuel shutoff valve 230 and to open the air injection valve 250 for a predetermined cooling time t1 to cool the injection tube 300 Step S110:
And controlling the HCI module based on the control information. 3. The method of claim 2,
The DPF regeneration step S100 may include opening the fuel injection valve 240 and the fuel shutoff valve 230 after the cooling step S110 and closing the air injection valve 250, (S120) charging fuel into the fuel cell stack 300;
And controlling the HCI module based on the control information. The method of claim 3,
The DPF regeneration step S100 may include a DPF regeneration start step S130 for repeatedly opening and closing the fuel injection valve 240 at a predetermined first reference period T1 after the charging step S120;
And controlling the HCI module based on the control information. 5. The method of claim 4,
Wherein the DPF regeneration start step (S130) is performed when the DPF regeneration rate is less than the preset reference rate (c) in the DPF regeneration completion determination step (S400). The method according to claim 1,
Wherein the DPF regeneration termination step (S500) is performed when the temperature of the front end of the DOC is less than a preset reference temperature (a) in the first regenerating / discharging condition determining step (S200). The method according to claim 1,
The DPF regeneration termination step S500 may include closing the fuel injection valve 240 and the fuel shutoff valve 230 and repeatedly opening and closing the air injection valve 250 by a predetermined reference number n, (S510) of opening and closing the air injection valve (250) repeatedly and opening the air injection valve (250) for a predetermined removal time (t2) to remove fuel in the injection pipe (300);
And controlling the HCI module based on the control information. 8. The method of claim 7,
The DPF regeneration termination step S500 may include the step of removing the fuel in the injection line after the step S510 to prevent the air injection valve 250 from being caulked by the HCI nozzle 400 at a predetermined second reference period T2) (S520);
And controlling the HCI module based on the control information. The method according to claim 1,
If the engine RPM is less than the predetermined idle RPM (b) in the DPF regeneration stopping condition determining step S300, the fuel injection valve 240 is closed, the fuel shutoff valve 230 is opened, (S600) for repeatedly opening and closing the DPF regeneration opening (250) at a predetermined opening time (d) and a predetermined closing time (e);
And controlling the HCI module based on the control information. 10. The method of claim 9,
A second regenerating / exiting condition determining step (S700) for determining whether the temperature of the front end of the DOC is less than the predetermined reference temperature (a) after the DPF regeneration stopping step (S600);
And controlling the HCI module based on the control information. 11. The method of claim 10,
(S500) ending the DPF regeneration when the temperature of the front end of the DOC is less than the predetermined reference temperature (a) in the second regenerating / discharging condition determining step (S700). Control method. 11. The method of claim 10,
If the temperature of the front end of the DOC is equal to or higher than the predetermined reference temperature (a) in the second regenerating / discharging condition determining step (S700), a DPF regeneration condition determining step of determining whether the engine RPM is equal to or greater than a predetermined starting RPM (S800);
And controlling the HCI module based on the control information. 13. The method of claim 12,
Wherein when the engine RPM is equal to or greater than the predetermined start RPM (f) in the step S800 of determining the DPF regeneration condition, the step (S110) of cooling the injection pipe is performed. 13. The method of claim 12,
Wherein the DPF regeneration stopping step S600 is performed when the engine RPM is less than the predetermined start RPM (f) in the DPF regeneration condition determination step S800. A storage medium storing a control method of an HCI module according to any one of claims 1 to 14. A storage medium (100) according to claim 15;
A fuel line 210 to which fuel is supplied from the engine E and an air line 220 to which compressed air is supplied from the air tank A, An HCI module 200 to which a fuel shutoff valve 230 and a fuel injection valve 240 are mounted and an air injection valve 250 is mounted on the air line 220;
A spray pipe 300 extending from a junction point of the fuel line 210 and the air line 220 and communicating the HCI module 200 with the HCI nozzle 400;
The HCI nozzle 400 injecting fuel or compressed air to the front end of the DOC;
A temperature sensor 500 for measuring the temperatures of the front and rear ends of the DOC;
A differential pressure sensor 600 installed at the front and rear ends of the DPF to measure the amount of PM deposited inside the DPF; And
The fuel cut-off valve 230, the fuel (not shown), and the fuel control valve 230 are controlled according to the control method of the HCI module stored in the storage medium 100 based on the temperature of the front end of the DOC, the RPM of the engine, A control unit 700 for controlling the opening and closing of the injection valve 240 and the air injection valve 250;
And a controller for controlling the HCI module.

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