CN110159403A - Prevent the method, apparatus and diesel vehicle that dpf regeneration is burnt - Google Patents
Prevent the method, apparatus and diesel vehicle that dpf regeneration is burnt Download PDFInfo
- Publication number
- CN110159403A CN110159403A CN201910639671.5A CN201910639671A CN110159403A CN 110159403 A CN110159403 A CN 110159403A CN 201910639671 A CN201910639671 A CN 201910639671A CN 110159403 A CN110159403 A CN 110159403A
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- Prior art keywords
- dpf
- regeneration
- engine
- high pressure
- burnt
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N9/00—Electrical control of exhaust gas treating apparatus
- F01N9/002—Electrical control of exhaust gas treating apparatus of filter regeneration, e.g. detection of clogging
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Processes For Solid Components From Exhaust (AREA)
Abstract
The present invention provides in a kind of engine driving process, simultaneously when DPF initiative regeneration, DPF head temperature can be stepped up, soot particulate combustion heat release inside DPF, if engine returns to idling operation because of outside traveling environmental change suddenly, soot particulate inside DPF is in oxygen-enriched combusting heat release state, engine idling causes exhaust gas flow is smaller to cause DPF heat dissipation few, its internal temperature steeply rises, after detecting engine operating condition variation, by introducing high pressure draught in the front end DPF, compensate the throughput that exhaust gas reduces part, take away DPF internal heat, reduce DPF peak internal temperatures, it avoids burning.The present invention also provides a kind of diesel engine and the devices for preventing dpf regeneration from burning.
Description
Technical field
The present invention relates to diesel vehicle technical fields, more specifically to a kind of method for preventing dpf regeneration from burning, dress
It sets and diesel vehicle.
Background technique
With diesel emission technology upgrading, using DPF technology, (Diesel Particulate Filter, particulate matter are caught
Catch technology), the PM particulate matters such as the most soot of tail gas can be filtered out, it is effective to reduce PM discharge, meet six exhaust method of state
Rule require.
But as engine on time increases, the soot accumulation weight in DPF is consequently increased, and leads to exhaust back pressure liter
Height, influences dynamic property, the fuel economy of engine, therefore after soot accumulation weight reaches certain amount, need periodically into
Row initiative regeneration, engine is by spraying diesel oil after spray after in cylinder or tail pipe in regenerative process, and diesel oil is in DOC(Diesel
Organic Catalyst, oxidizing catalytic converter) internal oxidition heat release, high temperature is generated, soot high-temperature oxydation is burnt and is removed,
Restore DPF function.
If engine occurs returning idling similar situation suddenly during initiative regeneration, carbon soot particles are rich inside DPF at this time
Oxygen burning, and cause heat dissipation few since exhaust gas flow is smaller, DPF internal temperature steeply rises, and will lead to DPF carrier and burns
It splits, burn and the damaged conditions such as melt.
Application No. is 201811155845.2 patent, a kind of DPF carrier protective device and method are disclosed, to avoid
DPF overheat, using bypass pipe is arranged between Engine exhaust pipeline, booster and after-treatment system, the end of bypass pipe connects
It is connected to high pressure gas bag, and bypass pipe is equipped with valve and is passed through the scheme that heat is discharged gas when DPF bed temperature abruptly increase.
However, its monitoring condition for DPF heating, for when engine stops working suddenly or the engine idle time
When greater than 1min, when above-mentioned two condition triggers, then identification will lead to DPF and generate amount of heat.
However, the condition criterion that above-mentioned patent heats up to DFP, due to the mutation of engine behavior, the row of will lead to
Throughput reduces, and the reproduction operation of DPF needs are determined according to soot accumulated amount, and engine operating condition variation leads to bypass pipe
The working condition of the unlatching of upper valve, DPF can not determine, when DPF, which is in regeneration, to be completed, even if heating in exhaust pipe, to DPF
Carrier influence it is weaker, generate bypass pipe non-productive work the case where, increase vehicle work load, increase energy consumption.
Therefore, how to avoid being vented in vain and increase vehicle energy consumption problem, be that current those skilled in the art are urgently to be resolved
Problem.
Summary of the invention
In view of this, increasing vehicle the present invention provides a kind of method for preventing dpf regeneration from burning to avoid invalid exhaust
Energy consumption problem；The present invention also provides a kind of diesel vehicle and the devices for preventing dpf regeneration from burning.
In order to achieve the above object, the invention provides the following technical scheme:
A method of prevent dpf regeneration from burning, comprising steps of
Step 1), whether monitoring vehicle is that engine is in driving cycle, and DPF initiative regeneration, if so, entering step 2)；
Whether step 2 monitors the engine and dashes forward back idling, if so, entering step 3)；
Step 3), introducing high pressure draught to the front end of the DPF, and detect whether the engine returns back to the driving cycle
Corresponding working speed, if so, the high pressure draught is closed, if not, entering step 4)；
Step 4) keeps the high pressure draught to be introduced to the front end DPF, until the DPF initiative regeneration is completed.
Preferably, in the above-mentioned method for preventing dpf regeneration from burning, the idling of dashing forward back is the engine by the work
Make revolving speed and is down to idling in the given time.
Preferably, in the above-mentioned method for preventing dpf regeneration from burning, the predetermined time is 10s.
Preferably, in the above-mentioned method for preventing dpf regeneration from burning, the high pressure draught is by the company that is arranged before the DPF
The airflow pipeline for passing to air compressor provides.
Preferably, in the above-mentioned method for preventing dpf regeneration from burning, further include before the step 1), when the engine
It works normally, and after the carbon carrying capacity of the DPF reaches initiative regeneration required value, issues initiative regeneration request, carry out initiative regeneration.
A kind of device for preventing dpf regeneration from burning, including gas exhaust piping, be sequentially set to the gas exhaust piping DOC and
DPF is provided with the supply air line of the high high pressure draught of pressure at expulsion in the inner of conveying, the supply air line on the gas exhaust piping
Gas supply end be located at the front end of the DPF；
It further include and when the dpf regeneration, controlling the supply air line and exporting high pressure when engine back dash forward idling by driving cycle
The control device of air-flow.
Preferably, in the above-mentioned device for preventing dpf regeneration from burning, the gas supply end of the supply air line is located at the DOC
Between the DPF.
Preferably, in the above-mentioned device for preventing dpf regeneration from burning, the gas supply end of the supply air line, which is provided with, controls it
The valve switch connector of opening and closing.
Preferably, in the above-mentioned device for preventing dpf regeneration from burning, the inlet end of the supply air line is connected to engine
The outlet side of front end air compressor.
A kind of diesel vehicle is provided with DOC and DPF on gas exhaust piping, is additionally provided on the gas exhaust piping as above any
The device that dpf regeneration is burnt is prevented described in one.
It is provided by the invention to prevent the method that dpf regeneration is burnt, comprising steps of
Step 1), whether monitoring vehicle is that engine is in driving cycle, and DPF initiative regeneration, if so, entering step 2)；
Whether step 2 monitors the engine and dashes forward back idling, if so, entering step 3)；
Step 3), introducing high pressure draught to the front end of DPF, and detect whether engine returns back to the corresponding work turn of driving cycle
Speed, if so, high pressure draught is closed, if not, entering step 4)；
Step 4) keeps high pressure draught to be introduced to the front end DPF, until DPF initiative regeneration is completed.In engine driving process, together
When DPF initiative regeneration when, DPF head temperature can be stepped up, the soot particulate combustion heat release inside DPF, if engine
Because outside traveling environmental change returns to idling operation suddenly, the soot particulate inside DPF is in oxygen-enriched combusting heat release state, hair
Motivation idling causes exhaust gas flow is smaller to cause DPF heat dissipation few, and internal temperature steeply rises, and is detecting engine operating condition change
After change, by introducing high pressure draught in the front end DPF, compensation exhaust gas reduces the throughput of part, takes away DPF internal heat, reduces
DPF peak internal temperatures avoid burning.
Present invention simultaneously provides a kind of devices for preventing dpf regeneration from burning, and prevent dpf regeneration from burning applied to above-mentioned
Method, including gas exhaust piping is sequentially set to the DOC and DPF of gas exhaust piping, it is high in the inner that conveying is provided on gas exhaust piping
The supply air line of the high pressure draught of pressure at expulsion, the gas supply end of supply air line are located at the front end of DPF；It further include when engine is by going
It sails operating condition to dash forward back idling, and when dpf regeneration, the control device of control supply air line output high pressure draught.High pressure draught passes through confession
Air pipe is delivered to gas exhaust piping, and the gas supply end of supply air line is located at the front end of DPF, by control device according to engine condition and
Whether DPF has the initiative reproduced state, controls the opening and closing of supply air line, guarantees that DPF is under reasonable regeneration temperature, avoids burning
It ruins, avoids being vented increase vehicle energy consumption problem in vain.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the flow chart of the method provided by the invention for preventing dpf regeneration from burning；
Fig. 2 is the structural schematic diagram of the device provided by the invention for preventing dpf regeneration from burning.
Specific embodiment
The invention discloses a kind of method for preventing dpf regeneration from burning, avoids invalid exhaust and increase vehicle energy consumption problem；
The present invention also provides a kind of diesel vehicle and the devices for preventing dpf regeneration from burning.
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Whole description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
The embodiment of the present invention, every other reality obtained by those of ordinary skill in the art without making creative efforts
Example is applied, shall fall within the protection scope of the present invention.
As shown in FIG. 1, FIG. 1 is the flow charts of the method provided by the invention for preventing dpf regeneration from burning.
The present invention provides a kind of methods for preventing dpf regeneration from burning, comprising steps of
S01: whether monitoring vehicle is that engine is in driving cycle, and DPF initiative regeneration.
Engine is in driving cycle, and engine speed increases, and extraction flow increases, when DPF enters initiative regeneration at this time,
Soot particulate ignition temperature increases in DPF.
S02: whether monitoring engine dashes forward back idling.
Engine is in normal operating conditions, and extraction flow variation is linear change, is not in flow mutation, DPF by
Stablize in changes in flow rate, is not in temperature jump.And engine speed dash forward back idling when, corresponding emergency brake or vehicle therefore
Barrier, extraction flow mutation, flow, which is rapidly lower, will lead to the high temperature of DPF and will not be taken away by exhaust gas, and DPF can be burnt due to high temperature.
By being monitored engine idling of whether dashing forward back, it can be achieved that controllable to DPF working condition.
S03: introducing high pressure draught to the front end of DPF, and detect whether engine returns back to the corresponding work of driving cycle
Revolving speed, if so, high pressure draught is closed, if not, entering step S04.
High pressure draught introducing takes away dpf regeneration and generates heat, at this time to engine speed real-time monitoring, if being constantly in idle
Speed, extraction flow deficiency need to be continually fed into high pressure draught, and after engine replys driving cycle normal work, then it can stop height
Pressure gas stream is passed through, and the extraction flow of engine is met the requirements.
S04: keeping high pressure draught to be introduced to the front end DPF, until DPF initiative regeneration is completed.
For the case where in DPF initiative regeneration duration, engine cannot return back to nominal situation, then high pressure draught is needed to hold
It is continuous to be passed through, it avoids DPF from generating temperature peak, guarantees safety.
In engine driving process, while when DPF initiative regeneration, DPF head temperature can be stepped up, the carbon inside DPF
Smoke particle object combustion heat release, if engine returns to idling operation because outside travels environmental change suddenly, the soot inside DPF
Grain object is in oxygen-enriched combusting heat release state, and engine idling causes exhaust gas flow is smaller to cause DPF heat dissipation few, and internal temperature is anxious
Play rises, and after detecting engine operating condition variation, by introducing high pressure draught in the front end DPF, compensation exhaust gas reduces part
Throughput takes away DPF internal heat, reduces DPF peak internal temperatures, avoids burning.
In one specific embodiment of this case, idling of dashing forward back is down to idling by working speed for engine in the given time.
Vehicle is in normal driving process, and the working speed of engine is higher than idling at this time, if an emergency situation is encountered, engine can be by
Working speed under former driving status in the given time in be down to idling, then may determine that as idling of dashing forward back.
Preferably, predetermined time 10s.The determination of the duration can be obtained under different rotating speeds by experiment according to engine
It in emergency, is obtained as returned to idling when emergency brake, different durations can also be carried out according to different operating revolving speed
The accurate control of high pressure draught intervention is realized in setting.
In one specific embodiment of this case, high pressure draught is by the airflow pipeline for being connected to air compressor that is arranged before DPF
It provides.
It further include working as engine work, and the carbon carrying capacity of DPF reaches main before S01 in one specific embodiment of this case
After dynamic regeneration requirements value, initiative regeneration request is issued, initiative regeneration is carried out.DPF when the engine is working, is held by S00 step
It is continuous to be monitored, in engine normal use process, after DPF carbon carrying capacity reaches initiative regeneration required value, issue initiative regeneration
Request carries out initiative regeneration.
As shown in Fig. 2, Fig. 2 is the structural schematic diagram of the device provided by the invention for preventing dpf regeneration from burning.
Present invention simultaneously provides a kind of devices for preventing dpf regeneration from burning, and prevent dpf regeneration from burning applied to above-mentioned
Method, including gas exhaust piping 5 is sequentially set to the DOC1 and DPF2 of gas exhaust piping 5, it is high that conveying is provided on gas exhaust piping 5
The supply air line 6 of the high pressure draught of pressure at expulsion in the inner, the gas supply end of supply air line 6 are located at the front end of DPF2；It further include working as
Engine 3 is dashed forward back idling by driving cycle, and when DPF2 regenerates, control supply air line 6 exports the control device of high pressure draught.It is high
Pressure gas stream is delivered to gas exhaust piping 5 by supply air line 6, and the gas supply end of supply air line 6 is located at the front end of DPF2, by control device
Whether had the initiative reproduced state according to 3 state of engine and DPF2, control the opening and closing of supply air line 6, guarantees that DPF is in reasonable
Under regeneration temperature, avoid burning.
In one specific embodiment of this case, the gas supply end of supply air line is between DOC1 and DPF2.Engine is dashed forward back idle
The operating condition of speed, oxygen-enriched combusting in DPF, temperature increase, and compressed air is passed directly into front of DPF, is directly taken away temperature in it,
High temperature is avoided to burn.
In one specific embodiment of this case, the gas supply end of supply air line 6 is provided with the valve switch connector of its opening and closing of control
7.Supply air line is only passed through compressed air in engine speed mutation status, and when engine/DPF is worked normally, air supply pipe
Road is closed, and valve switch connector 7 is arranged, and is avoided newly-increased supply air line 6 from working 5 normal exhaust of gas exhaust piping and is interfered.
In one specific embodiment of this case, the inlet end of supply air line is connected to going out for 3 front end air compressor 4 of engine
Gas end.The air supply that the front end DPF needs is relatively fewer, and supply air line 6 is introduced to the exhaust of air compressor 4, will not be right
The normal work of engine 3 has an impact, and avoids increasing independent gas supply equipment, reduces cost.
What is provided in based on the above embodiment prevents the device that dpf regeneration is burnt, the present invention also provides a kind of diesel vehicle,
Including being provided with DOC and DPF on its gas exhaust piping, which prevents dpf regeneration equipped with what is provided in above-described embodiment
The device burnt.
Since the diesel vehicle uses the device for preventing dpf regeneration from burning of above-described embodiment, so the diesel vehicle is by preventing
The device bring beneficial effect that only dpf regeneration is burnt please refers to above-described embodiment.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (9)
1. a kind of method for preventing dpf regeneration from burning, which is characterized in that comprising steps of
Step 1), whether monitoring vehicle is that engine is in driving cycle, and DPF initiative regeneration, if so, entering step 2)；
Whether step 2 monitors the engine and dashes forward back idling, if so, entering step 3)；
Step 3), introducing high pressure draught to the front end of the DPF, and detect whether the engine returns back to the driving cycle
Corresponding working speed, if so, the high pressure draught is closed, if not, entering step 4)；
Step 4) keeps the high pressure draught to be introduced to the front end DPF, until the DPF initiative regeneration is completed.
2. according to claim 1 prevent the method that dpf regeneration is burnt, which is characterized in that the idling of dashing forward back is described
Engine is down to idling by the working speed in the given time.
3. according to claim 2 prevent the method that dpf regeneration is burnt, which is characterized in that the predetermined time is 10s.
4. according to claim 1 prevent the method that dpf regeneration is burnt, which is characterized in that the high pressure draught is by described
The airflow pipeline for being connected to air compressor being arranged before DPF provides.
5. according to claim 4 prevent the method that dpf regeneration is burnt, which is characterized in that further include before the step 1),
After the carbon carrying capacity of the engine work, and the DPF reaches initiative regeneration required value, initiative regeneration request is issued,
Carry out initiative regeneration.
6. a kind of device for preventing dpf regeneration from burning, which is characterized in that including gas exhaust piping, be sequentially set to the exhaust pipe
The DOC and DPF on road are provided with the supply air line of the high high pressure draught of pressure at expulsion in the inner of conveying, institute on the gas exhaust piping
The gas supply end for stating supply air line is located at the front end of the DPF, and the gas supply end of the supply air line is located at the DOC and DPF
Between；
It further include and when the dpf regeneration, controlling the supply air line and exporting high pressure when engine back dash forward idling by driving cycle
The control device of air-flow.
7. according to claim 6 prevent the device that dpf regeneration is burnt, which is characterized in that the gas supply of the supply air line
End is provided with the valve switch connector of its opening and closing of control.
8. according to claim 7 prevent the device that dpf regeneration is burnt, which is characterized in that the air inlet of the supply air line
End is connected to the outlet side of motor head air compressor.
9. a kind of diesel vehicle, DOC and DPF are provided on gas exhaust piping, which is characterized in that also set on the gas exhaust piping
It is equipped with the device for preventing dpf regeneration from burning as described in any one of claim 6-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910639671.5A CN110159403A (en) | 2019-07-16 | 2019-07-16 | Prevent the method, apparatus and diesel vehicle that dpf regeneration is burnt |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910639671.5A CN110159403A (en) | 2019-07-16 | 2019-07-16 | Prevent the method, apparatus and diesel vehicle that dpf regeneration is burnt |
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| CN110159403A true CN110159403A (en) | 2019-08-23 |
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| CN201910639671.5A Pending CN110159403A (en) | 2019-07-16 | 2019-07-16 | Prevent the method, apparatus and diesel vehicle that dpf regeneration is burnt |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111365099A (en) * | 2020-03-31 | 2020-07-03 | 凯龙高科技股份有限公司 | Idling condition combustor DPF regeneration control system based on parking warm-up |
| CN111828147A (en) * | 2020-06-16 | 2020-10-27 | 义乌吉利动力总成有限公司 | Regeneration method and system for vehicle exhaust |
| CN112780423A (en) * | 2021-01-25 | 2021-05-11 | 潍柴动力股份有限公司 | Protection method of particulate matter trap for engine, engine assembly and vehicle |
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| CN109339919A (en) * | 2018-09-30 | 2019-02-15 | 潍柴动力股份有限公司 | A kind of DPF carrier protective device and method |
| CN109339917A (en) * | 2018-09-30 | 2019-02-15 | 潍柴动力股份有限公司 | The guard method of dpf regeneration |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111365099A (en) * | 2020-03-31 | 2020-07-03 | 凯龙高科技股份有限公司 | Idling condition combustor DPF regeneration control system based on parking warm-up |
| CN111365099B (en) * | 2020-03-31 | 2022-07-05 | 凯龙高科技股份有限公司 | Idling condition combustor DPF regeneration control system based on parking warm-up |
| CN111828147A (en) * | 2020-06-16 | 2020-10-27 | 义乌吉利动力总成有限公司 | Regeneration method and system for vehicle exhaust |
| CN111828147B (en) * | 2020-06-16 | 2022-06-14 | 义乌吉利动力总成有限公司 | Regeneration method and system for vehicle exhaust |
| CN112780423A (en) * | 2021-01-25 | 2021-05-11 | 潍柴动力股份有限公司 | Protection method of particulate matter trap for engine, engine assembly and vehicle |
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Application publication date: 20190823 |