CN115853621A - GPF service regeneration burning rate optimization method - Google Patents
GPF service regeneration burning rate optimization method Download PDFInfo
- Publication number
- CN115853621A CN115853621A CN202211709480.XA CN202211709480A CN115853621A CN 115853621 A CN115853621 A CN 115853621A CN 202211709480 A CN202211709480 A CN 202211709480A CN 115853621 A CN115853621 A CN 115853621A
- Authority
- CN
- China
- Prior art keywords
- gpf
- service
- regeneration
- optimization method
- rate optimization
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000008929 regeneration Effects 0.000 title claims abstract description 45
- 238000011069 regeneration method Methods 0.000 title claims abstract description 45
- 238000005457 optimization Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 21
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 23
- 238000002485 combustion reaction Methods 0.000 claims abstract description 15
- 230000001172 regenerating effect Effects 0.000 claims abstract description 11
- 238000011068 loading method Methods 0.000 claims abstract description 10
- 239000000446 fuel Substances 0.000 claims abstract description 6
- 230000003197 catalytic effect Effects 0.000 claims description 3
- 239000002245 particle Substances 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 abstract description 4
- 239000013618 particulate matter Substances 0.000 description 5
- 238000009825 accumulation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000001960 triggered effect Effects 0.000 description 3
- 238000006555 catalytic reaction Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Landscapes
- Exhaust Gas After Treatment (AREA)
Abstract
The invention discloses a GPF service regeneration combustion rate optimization, which is characterized in that a GDF target temperature is set to be 690 ℃, a combustion rate R =1000 { (Mori-Mleft)/T }, and a load RL = the actual fresh air inflow sucked by each cycle of an engine/the theoretical impulse of a working volume of a full cylinder in a standard state; wherein Mori is the initial carbon loading, T is the stable regeneration combustion time, and Mleft is the residual carbon loading; the air-fuel ratio set value is improved by 2-3%. The invention can safely improve the GPF exhaust temperature to 650-700 ℃, accelerate the accumulated carbon combustion and ensure that the carbon particles of the GPF can be basically eliminated in one service regeneration cycle; the method is an efficient GPF service regenerative combustion control technology.
Description
Technical Field
The invention relates to the technical field of automobile electronic control, in particular to a GPF service regenerative combustion rate optimization method.
Background
The particulate matter emission of gasoline engines is one of the pollutants that needs to be controlled in automobile emissions, and especially for direct injection engines, the cycle particulate matter emission is ten times that of the air intake injection engines. Since the beginning of the six-stage national regulation, the quality and quantity of particulate matter emissions fall within the scope of regulatory control. In order to reduce the amount of particulate matter discharged, various technologies have been developed, in which a Gasoline Particulate Filter (GPF) is one of the means for reducing the particulate matter discharge from the viewpoint of exhaust aftertreatment.
After installation of a GPF in a vehicle exhaust system, nearly 90% of the particulate emissions may be filtered. The particulate product of engine combustion contains carbon particles (gasoline combustion) and ash (engine oil combustion) which are trapped by the GPF and accumulate in the GPF. The accumulation of carbon particles and ash can improve the filtration coefficient of GPF in the early stage, and when the accumulation is too large, the exhaust back pressure of the engine can be increased, and the oil consumption is increased. Therefore, the GPF is regenerated at the right time. However, the vehicle running condition is quite complex, especially when the vehicle running time is too long, carbon particles in the GPF increase, and compared with the traditional GPF service regeneration, the carbon particles in the GPF can not be eliminated to the maximum within the same time during service regeneration.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a GPF service regeneration burning rate optimization method.
The invention provides the following technical scheme: a GPF service regeneration burning rate optimization method comprises the following steps:
setting a GDF target temperature to be 690 ℃, a combustion rate R =1000 { (Mori-Mleft)/T }, and a load RL = actual fresh air intake amount per cycle of an engine/theoretical impulse of a standard state full cylinder working volume;
wherein Mori is the initial carbon loading, T is the stable regeneration combustion time, and Mleft is the residual carbon loading;
the air-fuel ratio set value is improved by 2-3%.
Further, the service regeneration high idle speed is reduced by 8%.
Further, the engine catalytic efficiency at the time of NOx catalysis was reduced by 80%.
Further, the high-idle misfire rate threshold is reduced to 95%.
Further, the GDF target temperature is the average of the temperatures at 1/6 of the inlet of the GPF sample and at 5/6 of the inlet of the GPF sample.
Further, the GDF exhaust temperature is 650-700 deg.C.
Compared with the prior art, the invention provides a GPF service regenerative burning rate optimization method, which has the following beneficial effects:
the invention can safely improve the GPF exhaust temperature to 650-700 ℃, accelerate the accumulated carbon combustion and ensure that the carbon particles of the GPF can be basically eliminated in one service regeneration cycle; the method is an efficient GPF service regenerative combustion control technology.
Drawings
FIG. 1 is a system architecture diagram of the present invention;
FIG. 2 is a modified GPF sample test chart of the present invention;
FIG. 3 is an actual view of the GPF exhaust temperature and burning model of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, a GPF service regeneration burning rate optimization method, as shown in fig. 1, for a GPF regeneration service general strategy diagram, the system first calculates CCFs (GPF internal accumulation and ash amount characterization values) characterizing the amount of soot and ash inside the GPF. And then, respectively calculating the carbon smoke amount and the ash amount to provide regeneration requirements for the regeneration coordination module. When the engine runs in a working condition interval suitable for regeneration, the active regeneration is triggered by reducing the excess air coefficient and pushing back the ignition angle. And starting a service regeneration starting mode, starting a vehicle diagnostic instrument to trigger service regeneration, increasing the rotation speed of an engine, adjusting a target air-fuel ratio and a GPF target exhaust temperature, increasing the GPF temperature, and further performing charcoal burning.
As shown in fig. 2, this is a schematic diagram of a GPF service regeneration sample modification, and after the GPF is modified, various parameters can be obviously monitored, so that the purpose of adjusting parameters in a datamation manner can be achieved, preparation is made for subsequent EMS software optimization for up-adjusting the exhaust temperature of the GPF, and an EMS optimization value is finally obtained.
During normal GPF service regeneration, the exhaust temperature is mainly controlled to be above 580 degrees (carbon particle chemical reaction C +02= C02), the engine performance is limited, most GPF service regeneration temperatures are controlled to be at the balance point of 600-650 degrees, but in actual vehicle road driving, as users face various working conditions, the carbon carrying capacity of GPF is increased, the original service regeneration strategy is used, the carbon carrying capacity of GPF cannot be completely eliminated only by controlling the exhaust temperature to be near 600 degrees, the exhaust temperature during GPF service regeneration needs to be increased to quickly eliminate the carbon particles in GPF, the exhaust temperature is increased, fire is caused, NOx exceeds the standard, the GPF is too large, and other influences are caused.
The strategy is to increase the original air-fuel ratio set value (initially set to be 1.1) by 2-3%, and set the GPF target temperature 690 ℃, which is the average of the temperatures at the GPF inlet 1/6 and the GPF inlet 5/6. The burning rate was set as: r =1000 { (Mori-Mleft)/T }, where Mori is the initial carbon loading, T is the stable regenerative burn time, and Mleft is the residual carbon loading.
Load RL = theoretical impulse of the engine per cycle intake of actual fresh intake air/standard state full of cylinder swept volume.
The exhaust temperature of GPF service regeneration can reach 650-700 ℃, the service regeneration high idle speed of about 8% is reduced (the idle speed of the technology can be reduced from 3000r/min to 2800 r/min), the catalytic efficiency of the related engine in the process of NOX catalysis is reduced by 80% (the step can reduce the excessive NOX gaseous matter caused by the rise of the exhaust temperature), and 95% of the high belt speed fire rate threshold value is adjusted (the step can avoid the false fire alarm of the engine caused by the over-lean air-fuel ratio and the fluctuation of the engine speed). Service interruption is not triggered while GPF service regeneration is met;
as shown in fig. 3, as a result of increasing the GPF burning rate after the strategy is implemented, line 1 is a temperature value (680 degrees) during the regeneration of the optimized GPF service, line 2 is a temperature (630 degrees) during the regeneration of the GPF service before the optimization, line 3 is a change (16 g-11 g) in the carbon loading during the regeneration of the GPF service before the optimization, line 4 is a change (16 g-7 g) in the carbon loading during the regeneration of the GPF service after the optimization, and when the GPF service regeneration is satisfied, the service interruption is not triggered, and the burning efficiency is increased by more than 150%. Note: comparisons are made at the same service regeneration time.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A GPF service regeneration burning rate optimization method is characterized in that: the method comprises the following steps:
setting a GDF target temperature to be 690 ℃, a combustion rate R =1000 { (Mori-Mleft)/T }, and a load RL = actual fresh air intake amount per cycle of an engine/theoretical impulse of a standard state full cylinder working volume;
wherein Mori is the initial carbon loading, T is the stable regeneration combustion time, and Mleft is the residual carbon loading;
the air-fuel ratio set value is improved by 2-3%.
2. The GPF service regenerative burn rate optimization method of claim 1, characterized by: the reduction of 8% of the service regeneration high idle speed.
3. The GPF service regenerative burn rate optimization method of claim 2, characterized by: reduce the engine catalytic efficiency when NOx is catalyzed by 80%.
4. The GPF service regeneration burn rate optimization method of claim 3, wherein: the high-idle misfire rate threshold is reduced to 95%.
5. The GPF service regenerative burn rate optimization method of claim 1, characterized by: the GDF target temperature is the average of the temperatures at GPF inlet 1/6 and GPF inlet 5/6.
6. The GPF service regeneration burn rate optimization method of claim 5, wherein: the GDF exhaust temperature is 650-700 deg.C.
7. A GPF service regenerative burn rate optimization system, characterized by: the system comprises an automobile diagnostic instrument, an EMS and a service regeneration module;
the diagnostic instrument is used for controlling the start and interruption of the regeneration service, the EMS collects data to the service regeneration module, and the service regeneration module executes the GPF service regeneration burning rate optimization method of claims 1-6.
8. The GPF service regenerative burn rate optimization method according to claim 7, characterized in that: the temperature sensor is arranged at 1/6 position of the GDF sample inlet and 5/6 position of the inlet and used for detecting the temperature at the two positions so as to monitor the GDF temperature.
9. An apparatus, characterized by: comprises a memory having a computer processing program stored thereon;
a processor for use in a computer processing program in a memory to implement a GPF service regenerative burn rate optimization method as claimed in any one of claims 1 to 6.
10. A storage medium having a computer processing program stored thereon, characterized in that: the program when executed by a processor chip implements the steps of the GPF service regeneration burn rate optimization method of any of claims 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211709480.XA CN115853621A (en) | 2022-12-29 | 2022-12-29 | GPF service regeneration burning rate optimization method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211709480.XA CN115853621A (en) | 2022-12-29 | 2022-12-29 | GPF service regeneration burning rate optimization method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115853621A true CN115853621A (en) | 2023-03-28 |
Family
ID=85655993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211709480.XA Pending CN115853621A (en) | 2022-12-29 | 2022-12-29 | GPF service regeneration burning rate optimization method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115853621A (en) |
-
2022
- 2022-12-29 CN CN202211709480.XA patent/CN115853621A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3839235A1 (en) | Method and system for controlling dpf regeneration, and engine | |
| JP4404531B2 (en) | A method for initiating particulate filter regeneration for a direct injection diesel engine using a common rail injection system. | |
| CN102052179B (en) | Method for controlling fuel of a spark ignited engine while regenerating a particulate filter | |
| US7275365B2 (en) | Method for controlling temperature in a diesel particulate filter during regeneration | |
| CN102373989B (en) | Target particulate matter filter regeneration and temperature control system | |
| CN104863670B (en) | A kind of gasoline engine particulate matter filtration system and renovation process | |
| CN102003257A (en) | Control of diesel particulate filter regeneration duration | |
| CN109667642B (en) | Method for judging DPF regeneration of diesel engine | |
| JP5218664B2 (en) | Exhaust gas purification device for internal combustion engine | |
| JP4544011B2 (en) | Internal combustion engine exhaust purification system | |
| JP2019044670A (en) | Exhaust emission control system for internal combustion engine | |
| JP5332575B2 (en) | Exhaust gas purification device for internal combustion engine | |
| KR20120011563A (en) | Exhaust gas post processing system and control method thereof | |
| JP2003500596A (en) | Method and apparatus for controlling an internal combustion engine | |
| KR20060117947A (en) | Method for controlling the regeneration of a particulate filter | |
| CN112127979B (en) | Regeneration method and system of particulate matter catcher, engine and motor vehicle | |
| CN102305118B (en) | The system and method for control delivery temperature during particulate matter filter regeneration | |
| KR20120011564A (en) | Exhaust gas post processing system and system performing this | |
| US20120102921A1 (en) | System and method for controlling regeneration of an exhaust after-treatment device | |
| CN115853621A (en) | GPF service regeneration burning rate optimization method | |
| JP2002276340A (en) | Exhaust emission control device and exhaust emission control method | |
| JP2010090875A (en) | Exhaust gas control device for internal combustion engine | |
| JP2003155921A (en) | Exhaust emission control device of internal combustion engine | |
| KR20160050201A (en) | Apparatus and method for regenerating diesel particular matter filter | |
| JP4356583B2 (en) | Fuel injection control device for internal combustion engine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20240425 Address after: 241000 No. 8, Changchun Road, Wuhu economic and Technological Development Zone, Anhui, China Applicant after: CHERY AUTOMOBILE Co.,Ltd. Country or region after: China Address before: 241000 Building 8, science and Technology Industrial Park, 717 Zhongshan South Road, Yijiang District, Wuhu City, Anhui Province Applicant before: Chery Commercial Vehicles (Anhui) Co., Ltd. Country or region before: China |
|
| TA01 | Transfer of patent application right |