CN114000936B - Control method, system and computer readable storage medium for reducing carbon deposition of gasoline particle catcher of direct injection engine - Google Patents
Control method, system and computer readable storage medium for reducing carbon deposition of gasoline particle catcher of direct injection engine Download PDFInfo
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- CN114000936B CN114000936B CN202111213937.3A CN202111213937A CN114000936B CN 114000936 B CN114000936 B CN 114000936B CN 202111213937 A CN202111213937 A CN 202111213937A CN 114000936 B CN114000936 B CN 114000936B
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- engine
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- particle catcher
- oil injection
- gasoline
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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
- 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
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/04—Cleaning of, preventing corrosion or erosion in, or preventing unwanted deposits in, combustion engines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/021—Introducing corrections for particular conditions exterior to the engine
- F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
- F02D41/027—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus
- F02D41/029—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus the exhaust gas treating apparatus being a particulate filter
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- 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)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The invention provides a control method for reducing carbon deposition of a gasoline particle catcher of a direct injection engine. Then, the engine control unit processes based on the received coolant temperature signal to obtain an operating time T during which the engine control unit executes an injection strategy 2 that favors accumulation of carbon in a gasoline particulate trap (GPF). Finally, when the engine control unit judges that the engine running time exceeds the running time T, the oil injection strategy 1 beneficial to engine oil dilution is executed. The invention also provides a control system for reducing carbon deposition of the gasoline particle catcher of the direct injection engine and a computer readable storage medium. The invention is based on an oil injection strategy, effectively reduces the carbon accumulation of the gasoline particle catcher (GPF) under the condition of ensuring the dilution performance of engine oil, and can take both the dilution performance of engine oil and the carbon accumulation performance of the gasoline particle catcher (GPF) into consideration.
Description
Technical Field
The invention belongs to the control technology of an automobile Engine Management System (EMS), and particularly relates to control of accumulated carbon of a gasoline particle catcher (GPF).
Background
In 2016, china issues the latest emission standard of light automobile pollutant emission limit value and measurement method (Chinese sixth stage), the emission limit value of gaseous pollutants in tail gas is tightly increased, the emission of the particulate matters and the particulate matters of an engine are limited, and the limit values are respectively 3.0mg/km and 6.0E+11#/km after 2020. In the face of strict particulate matter emission limits, a gasoline particulate trap (GPF) is an effective treatment technology for reducing particulate matter emission to meet national emission standards, and more vehicle types will be carried with the GPF in the future.
The gasoline particulate trap is typically integrated into a muffler assembly, disposed below the vehicle chassis, and carbon deposition is primarily due to the tendency to occur under low temperature conditions. In areas with the environmental temperature lower than-10 ℃ and below, because fuel atomization is poor, a large amount of soot (soot) generated by combustion is discharged to a gasoline particle catcher (GPF), if an engine runs at a low water temperature for a long time, the gasoline particle catcher (GPF) is overloaded with carbon, the gasoline particle catcher (GPF) is blocked, the exhaust back pressure is increased, the economy and the dynamic performance are seriously deteriorated, and the user satisfaction is influenced.
The GDI gasoline engine fuel is injected directly into the cylinder and the fuel will be injected directly on the piston crown or cylinder wall. If directly injected at the piston crown, a significant amount of soot is generated. If the fuel is directly sprayed on the cylinder wall, part of the fuel can be directly mixed into engine oil, so that the liquid level of the engine oil rises, the engine oil is diluted, and the low-speed running in urban areas is particularly obvious. The conventional oil injection strategy has only a single mode, is prone to engine oil dilution performance, is extremely unfavorable for accumulating carbon in a gasoline particle trap (GPF), and is easy to cause blockage of the gasoline particle trap (GPF).
Patent document CN103016118B discloses a control method for preventing regeneration sintering of a particle catcher, comprising: acquiring regeneration related parameters of the particle catcher, wherein the regeneration related parameters comprise an oxidation catalyst inlet temperature, an oxidation catalyst outlet temperature, a particle catcher outlet temperature, a pressure difference between the front and the rear of the particle catcher and an oxidation catalyst airspeed; and adjusting up or down the fuel injection quantity required by the regeneration of the particle catcher according to the acquired regeneration related parameters, and injecting fuel according to the adjusted fuel injection quantity. The technology mainly relates to a control method for regeneration sintering, which can cause excessive temperature of a catalyst in the active regeneration process, and aims to solve the problem of carbon deposition from the source by reducing the carbon deposition in consideration of how to reduce the carbon deposition.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to provide a control method, a control system and a computer-readable storage medium for reducing the soot of a gasoline particle catcher of a direct injection engine.
The technical scheme of the invention is as follows:
a control method for reducing carbon deposition of a gasoline particle catcher of a direct injection engine comprises the following steps:
firstly, an engine control unit acquires relevant characteristic signals of the whole vehicle and an engine in real time, wherein the characteristic signals comprise engine cooling liquid temperature signals.
Then, the engine control unit processes based on the received coolant temperature signal to obtain an operating time T during which the engine control unit executes an injection strategy 2 that favors accumulation of carbon in a gasoline particulate trap (GPF).
Finally, when the engine control unit judges that the engine running time exceeds the running time T, the oil injection strategy 1 beneficial to engine oil dilution is executed.
The oil injection strategy 2 is to pre-select the most favorable oil injection phase for accumulating carbon of a gasoline particle catcher (GPF) by sweeping the rotation speed and the load on a whole vehicle hub of a low-temperature cabin, and the engine injects oil according to the oil injection phase.
The oil injection strategy 1 is that 1-2 oil injection strategies of optimal engine oil dilution are obtained through CAE simulation, then the whole vehicle verification and calibration are carried out on a low-temperature bin rotating hub, the most favorable oil injection phase for engine oil dilution is selected, and the engine carries out oil injection according to the oil injection phase.
The calculation mode of the running time T is calibrated based on the starting water temperature according to the carbon accumulating characteristic of the engine, and the running time T is a calibratable quantity. The running time T is generally set to be within 100-300 in consideration of the engine oil dilution performance, and is specifically calibrated and verified based on performance targets of the two, so that the carbon deposition performance of the gasoline particle catcher and the engine oil dilution performance are ensured to meet the requirements.
According to the technical scheme, the method is characterized in that the oil injection strategy scheme 1 beneficial to engine oil dilution is formulated through the calibration of the whole vehicle hub of the low-temperature bin, and the oil injection strategy 2 beneficial to carbon accumulation of a gasoline particle catcher (GPF) is formulated. After the engine oil dilution performance is ensured, the accumulated carbon of a gasoline particle catcher (GPF) can be effectively reduced, and the two performances of engine oil dilution and accumulated carbon of the gasoline particle catcher (GPF) are considered. The method can effectively reduce the carbon deposition of the gasoline particle catcher, lead the carbon deposition to be less, and solve the carbon deposition problem from the source.
Drawings
FIG. 1 is a control logic diagram employed by the present invention.
Detailed Description
The technical solutions in the examples of the present invention will be clearly and completely described below with reference to the accompanying drawings in the examples of the present invention. The described examples are only some embodiments, but not all embodiments, of the present invention. All other examples, which a person of ordinary skill in the art would obtain without undue burden based on the embodiments of the invention, are within the scope of the invention.
The embodiment provides a scheme for reducing soot of a gasoline particle catcher (GPF) of a direct injection engine, and combines soot accumulation and engine oil dilution performance of the GPF.
As shown in fig. 1, first, relevant characteristic signals of the whole vehicle and the engine are obtained in real time by an engine control unit. The characteristic signals comprise engine cooling liquid temperature signals, the engine control unit processes the engine cooling liquid temperature signals based on the received cooling liquid temperature signals to obtain the operation time T of an oil injection strategy 2 beneficial to carbon accumulation of a gasoline particle trap (GPF), the engine control unit executes the oil injection strategy 2 beneficial to carbon accumulation of the gasoline particle trap (GPF) in the period of time T, and the engine control unit judges that the engine control unit executes an oil injection strategy scheme 1 beneficial to engine oil dilution after the engine operation time exceeds the operation time T of the oil injection strategy 2. The oil injection strategy 2 can effectively reduce carbon accumulation of a gasoline particle catcher (GPF), and the oil injection strategy 1 can improve the dilution performance of engine oil. The oil injection strategy 2 needs to sweep the point of each rotating speed and load on the whole vehicle hub in advance, and selects the most favorable oil injection phase for accumulating carbon of a gasoline particle catcher (GPF); the oil injection strategy 1 needs to perform whole vehicle calibration on the low-temperature bin rotating hub in advance, and selects the oil injection phase which is most favorable for engine oil dilution.
The invention is described in further detail below in conjunction with the control logic of fig. 1.
And step 1, the engine control unit acquires a starting water temperature signal in real time and inputs the starting water temperature signal to the oil injection mode time calculation module.
And 2, calculating the time T favorable for the carbon accumulation fuel injection mode by a fuel injection mode operation time module, wherein the time T can be calibrated based on the starting water temperature according to the project and the carbon accumulation characteristic of the engine, and is a calibratable quantity. The running time T is generally set to be within 100-300 seconds, and the calibration and verification are specifically carried out based on the performance targets of the two, so that the carbon deposition performance of the gasoline particle catcher and the engine oil dilution performance of the engine are ensured to meet the requirements
Step 3, starting timing of the running time of the engine after starting, wherein the running time is greater than or equal to the time T, and executing an oil injection strategy scheme 1 beneficial to engine oil dilution by an engine control unit; otherwise, the EMS system executes fuel injection strategy 2 that facilitates gasoline particulate trap (GPF) carbon build-up.
The oil injection strategy 2 is to calibrate the whole vehicle hub, and select the most favorable oil injection phase for accumulating carbon of a gasoline particle catcher (GPF); the oil injection strategy 1 needs to be calibrated on the whole vehicle hub, and the most favorable oil injection phase for engine oil dilution is selected.
This example further illustrates the determination of two injection strategies.
The fuel injection strategy 1 determines: firstly, obtaining 1-2 oil injection strategies of optimal engine oil dilution through CAE simulation, then carrying out whole vehicle verification and calibration through rotating a hub in a low-temperature bin, obtaining the rising height of the engine oil liquid level after each scheme test is completed, determining the oil injection strategy with the minimum engine oil liquid level and meeting the target as the oil injection strategy 1, and carrying out oil injection according to the oil injection phase by an engine.
The fuel injection strategy 2 determines: and (3) carrying out oil injection phase scanning point calibration on the low-temperature bin rotating hub, and weighing the GPF every time the test is completed to obtain the carbon deposit quantity. And after all scheme experiments are completed, comparing the accumulated carbon quantity of various schemes, wherein the scheme with the smallest accumulated carbon quantity is an oil injection strategy 2. The engine sprays oil according to the oil spraying phase.
The oil injection strategy 2 is to pre-select the most favorable oil injection phase for accumulating carbon of a gasoline particle catcher (GPF) by sweeping the rotation speed and the load on a whole vehicle hub of a low-temperature cabin, and the engine injects oil according to the oil injection phase.
The oil injection strategy 1 is that 1-2 oil injection strategies of optimal engine oil dilution are obtained through CAE simulation, then the whole vehicle verification and calibration are carried out on a low-temperature bin rotating hub, the most favorable oil injection phase for engine oil dilution is selected, and the engine carries out oil injection according to the oil injection phase.
In a further embodiment, a control system for reducing carbon deposition of a gasoline particle catcher of a direct injection engine is provided, which includes a processor and a memory, where the memory stores a computer program, and when the computer program is executed by the processor, the control method for reducing carbon deposition of a gasoline particle catcher of a direct injection engine described in the previous embodiment is implemented.
In yet another embodiment, a computer readable storage medium is provided, on which a computer program is stored, characterized in that the computer program, when executed by a processor, implements the control method for reducing carbon deposition of a gasoline particulate trap of a direct injection engine according to the previous embodiment.
The above embodiments show that the invention skillfully solves the problems of engine oil dilution and excessive carbon accumulation of a gasoline particle catcher (GPF).
Claims (5)
1. A control method for reducing carbon deposition of a gasoline particle catcher of a direct injection engine is characterized by comprising the following steps:
firstly, an engine control unit acquires relevant characteristic signals of a whole vehicle and an engine in real time, wherein the characteristic signals comprise engine coolant temperature signals;
then, the engine control unit processes the received cooling liquid temperature signal to obtain operation time T, and in the period of time T, the engine control unit executes an oil injection strategy 2 which is beneficial to accumulating carbon of a gasoline particle catcher (GPF);
finally, after the engine control unit judges that the engine running time exceeds the running time T, executing an oil injection strategy 1 which is beneficial to engine oil dilution;
the oil injection strategy 2 is to pre-select the most favorable oil injection phase for accumulating carbon of a gasoline particle catcher (GPF) by sweeping the rotation speed and the load on a whole vehicle hub of a low-temperature bin, and the engine injects oil according to the oil injection phase;
the oil injection strategy 1 is that 1-2 oil injection strategies of optimal engine oil dilution are obtained through CAE simulation, then the whole vehicle verification and calibration are carried out on a low-temperature bin rotating hub, the most favorable oil injection phase for engine oil dilution is selected, and the engine carries out oil injection according to the oil injection phase.
2. The control method for reducing carbon deposition of a gasoline particulate trap of a direct injection engine according to claim 1, wherein the running time T is calculated by calibrating a starting water temperature based on the accumulated carbon characteristic of the engine to a calibratable amount.
3. The control method for reducing carbon deposition in a gasoline particulate trap of a direct injection engine according to claim 1, wherein the running time T is 100 to 300 seconds.
4. The control system for reducing carbon deposition of the gasoline particle catcher of the direct injection engine is characterized by comprising a processor and a memory, wherein the memory is stored with a computer program, and the control method for reducing carbon deposition of the gasoline particle catcher of the direct injection engine is realized according to any one of claims 1-3 when the computer program is executed by the processor.
5. A computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the control method for reducing carbon deposition in a gasoline particulate trap of a direct injection engine according to any one of claims 1 to 3.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111213937.3A CN114000936B (en) | 2021-10-19 | 2021-10-19 | Control method, system and computer readable storage medium for reducing carbon deposition of gasoline particle catcher of direct injection engine |
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| CN202111213937.3A CN114000936B (en) | 2021-10-19 | 2021-10-19 | Control method, system and computer readable storage medium for reducing carbon deposition of gasoline particle catcher of direct injection engine |
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| CN114000936B true CN114000936B (en) | 2023-08-22 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105298601A (en) * | 2015-10-22 | 2016-02-03 | 上海汽车集团股份有限公司 | Method for controlling tail gas particle catcher in idling state of vehicle |
| CN107916972A (en) * | 2017-12-20 | 2018-04-17 | 广州汽车集团股份有限公司 | Engine particle trap initiative regeneration householder method, device, storage medium and system |
| CN109184857A (en) * | 2018-10-23 | 2019-01-11 | 武汉布朗环境能源有限公司 | A kind of efficient detonation cleaning and regeneration method of DPF, control system and device |
| CN110939498A (en) * | 2019-12-16 | 2020-03-31 | 东风汽车集团有限公司 | Supercharged gasoline hybrid vehicle type GPF regeneration device and control method |
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2021
- 2021-10-19 CN CN202111213937.3A patent/CN114000936B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105298601A (en) * | 2015-10-22 | 2016-02-03 | 上海汽车集团股份有限公司 | Method for controlling tail gas particle catcher in idling state of vehicle |
| CN107916972A (en) * | 2017-12-20 | 2018-04-17 | 广州汽车集团股份有限公司 | Engine particle trap initiative regeneration householder method, device, storage medium and system |
| CN109184857A (en) * | 2018-10-23 | 2019-01-11 | 武汉布朗环境能源有限公司 | A kind of efficient detonation cleaning and regeneration method of DPF, control system and device |
| CN110939498A (en) * | 2019-12-16 | 2020-03-31 | 东风汽车集团有限公司 | Supercharged gasoline hybrid vehicle type GPF regeneration device and control method |
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| CN114000936A (en) | 2022-02-01 |
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