CN109505705A - A kind of gasoline engine grain catcher DECEL ENLEAN regeneration hierarchical control method and control system - Google Patents
A kind of gasoline engine grain catcher DECEL ENLEAN regeneration hierarchical control method and control system Download PDFInfo
- Publication number
- CN109505705A CN109505705A CN201811574677.0A CN201811574677A CN109505705A CN 109505705 A CN109505705 A CN 109505705A CN 201811574677 A CN201811574677 A CN 201811574677A CN 109505705 A CN109505705 A CN 109505705A
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- China
- Prior art keywords
- carrying capacity
- engine
- fuel delivery
- gpf
- charcoal
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Classifications
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/08—Exhaust gas treatment apparatus parameters
- F02D2200/0812—Particle filter loading
Abstract
The invention discloses a kind of gasoline engine grain catcher DECEL ENLEAN regeneration hierarchical control method and control systems, it realizes the removing of carbon distribution in gasoline engine grain catcher by engine retard oil-break process, vehicle-mounted ECU determines whether to disconnect the fuel delivery of engine according to current accumulation carbon carrying capacity, when disconnecting the fuel delivery of engine, vehicle-mounted ECU calculates the disconnection duration of the fuel delivery of engine using current accumulation carbon carrying capacity.The present invention is not under the premise of increasing extra hardware; control method of the invention is cooperated to realize the removing to carbon distribution in GPF using engine retard oil-break process; so that engine can effectively clear charcoal in high charcoal carrying capacity; GPF can also be protected not damage because regeneration temperature is excessively high simultaneously, to ensure that the service life of GPF.
Description
Technical field
The invention belongs to technical field of automobile control, it is intended to realize the grain catcher (Gasoline of gasoline engine
Particle Filter) control and protection.
Background technique
With discharge and fuel economy regulation it is increasingly harsh, gasoline engine is especially pressurized directly jetting gasoline engine particulate matter and reaches regulation
Target becomes difficult point, and GPF is a kind of effectively direct outer purifier, but gasoline engine is using after GPF, if long-play
In low temperature speed operation, particulate matter can accumulate rapidly blocking GPF, influence also damage engine when engine power performance is serious.
In order to avoid the blocking of GPF has to consider clear charcoal measure, moderating process when using engine accelerator releasing can have
Eliminating particle object is imitated, but can then can in the presence of the risk for burning catalyst converter but if completely closing fuel cut-off control in high charcoal carrying capacity
Increase oil consumption, while being also unfavorable for the removing of charcoal, the blocking of GPF is accumulated and caused to acceleration charcoal.Therefore it needs to consider that setting is closed
The control program of reason make engine in high charcoal carrying capacity can effectively clear charcoal, while can also protect GPF not because of regeneration temperature mistake
It is high and damage.
Summary of the invention
The purpose of the present invention is to provide a kind of gasoline engine grain catcher DECEL ENLEANs to regenerate hierarchical control method, leads to
Cross and the monitoring of real-time charcoal carrying capacity divided and carried out to charcoal carrying capacity region, when calculating DECEL ENLEAN in real time according to different charcoal carrying capacity into
The air capacity entered controls the oil-break time not burn the air capacity of GPF, to guarantee efficiently to remove product using DECEL ENLEAN
Charcoal.
In order to solve the above technical problems, present invention employs such a gasoline engine grain catcher DECEL ENLEAN is estranged again
Grade control method, the removing of carbon distribution in gasoline engine grain catcher, vehicle-mounted ECU root are realized by engine retard oil-break process
The fuel delivery that disconnection engine is determined whether according to current accumulation carbon carrying capacity, when disconnecting the fuel delivery of engine, vehicle
Carry the disconnection duration that ECU calculates the fuel delivery of engine using the charcoal carrying capacity that currently allows to burn.
In a kind of preferred embodiment of the invention, the current calculation formula for accumulating carbon carrying capacity is as follows, currently accumulates carbon
Carrying capacity=cold start charcoal carrying capacity+stable state charcoal carrying capacity * water temperature/air-fuel ratio correction.Wherein cold start charcoal carrying capacity is in -30-90 degree water
The primary tired charcoal weight * number of starts of the lower engine start of temperature, start primary charcoal carrying capacity can be by repeatedly tiring out under different water temperatures
Charcoal again obtains GPF weighing/number；Stable state charcoal carrying capacity can direct measurement standard by laboratory or vehicle-mounted particulate matter measuring apparatus
The generation rate of charcoal particle when 90 degree of coolant water temperature and excess air coefficient are 1, with same under different water temperatures and air-fuel ratio
Measurement method and the measured value of 90 degree of water temperatures and excess air coefficient 1 compare to obtain water temperature/air-fuel ratio correction coefficient.
In a kind of preferred embodiment of the invention, when allowing to disconnect the fuel delivery of engine, including following two
Kind operating condition: fuel delivery allows turn-off time unrestricted and fuel delivery allows turn-off time limited.
In a kind of preferred embodiment of the invention, the fuel delivery of engine allows the condition disconnected to be: current tired
Carbon distribution carrying capacity C≤Limit1, Limit1's is defined as: Limit1 is the lower limit theory carbon carrying capacity accumulated in GPF, in GPF
Less than or equal to the charcoal completely burned of lower limit theory carbon carrying capacity, will not make GPF internal temperature is more than GPF maximum permissible temperature.
In a kind of preferred embodiment of the invention, the condition that the fuel delivery limitation of engine disconnects is: current tired
Carbon distribution carrying capacity > Limit1, Limit1's is defined as: Limit1 is the lower limit theory carbon carrying capacity accumulated in GPF, in lower limit and
Following theory carbon carrying capacity completely burned, will not make GPF internal temperature is more than GPF maximum permissible temperature.
In a kind of preferred embodiment of the invention, the calculation formula of the disconnection duration of the fuel delivery of engine is such as
Under: charcoal carrying capacity=(GPF maximum permissible temperature-GPF Current Temperatures) the * GPF mass * GPF specific heat capacity that currently allows to burn/charcoal heat
Value；The disconnection duration of the fuel delivery of the engine=charcoal carrying capacity C* unit charcoal oxygen demand that currently allows to burn/oxygen supply
Rate.Wherein oxygen delivery rate is the content that oxygen in the unit time air that lambda sensor measures is carried by engine.
In a kind of preferred embodiment of the invention, the fuel delivery of engine forbids the condition disconnected to be: current tired
Carbon distribution carrying capacity >=Limit2, Limit2's is defined as: Limit2 is the upper-bound theory carbon carrying capacity accumulated in GPF, works as engine
Fuel delivery disconnect when, upper-bound theory carbon carrying capacity burn when, the real time temperature of GPF is more than the permission temperature of GPF.
In a kind of preferred embodiment of the invention, following parameter value is preset in the vehicle-mounted ECU: GPF highest permits
Perhaps temperature, GPF mass, GPF specific heat capacity, charcoal calorific value, Limit1, Limit2 and air-fuel ratio correction.
In a kind of preferred embodiment of the invention, the value of Limit1 and Limit2 are obtained by test.
In a kind of preferred embodiment of the invention, specific step is as follows, step 1, calculates gasoline engine granule capturing
Carbon carrying capacity C is currently accumulated in device；Control area is divided into three areas using charcoal carrying capacity limit value Limit1 and Limit2 by step 2
Domain: the disconnection duration of X≤Limit1, the fuel delivery of engine are unrestricted；Limit1 < X < Limit2, the fuel oil of engine
The disconnection duration of supply is limited；Limit2≤X continually develops the fuel delivery of motivation；Step 3, by C assignment in X, according to this
Whether region decision disconnects the fuel delivery of engine, and calculates the disconnection duration of the fuel delivery of engine.
The invention also discloses a kind of gasoline engine grain catcher DECEL ENLEAN generation control systems comprising ECU control
Module receives current accumulation carbon carrying capacity signal, and as current accumulation carbon carrying capacity C≤Limit1, feedback disconnects unrestricted signal to holding
Row structure；When Limit1 < currently accumulates carbon carrying capacity C < Limit2, vehicle-mounted ECU calculates hair using the charcoal carrying capacity that currently allows to burn
The disconnection duration of the fuel delivery of motivation, feedback disconnect constrained signal and disconnect duration signal to executing structure；As Limit2 <
When current accumulation carbon carrying capacity C, feedback forbids cut-off signal to executing structure；According to the Current Temperatures meter of gasoline engine grain catcher
Calculating currently allows charcoal carrying capacity of burning；Temperature detecting module, the Current Temperatures for real-time detection gasoline engine grain catcher are concurrent
It send to ECU control module；Carbon carrying capacity detection module, the current accumulation carbon carrying capacity for real-time detection gasoline engine grain catcher is simultaneously
It is sent to ECU control module；Executing agency, for according to unrestricted signal control engine fuel delivery disconnect duration not by
Limit；For disconnecting duration according to the fuel delivery for disconnecting constrained signal and disconnection duration signal control engine；For according to taboo
Only the fuel delivery of cut-off signal control engine is forbidden disconnecting.
The beneficial effects of the present invention are: the present invention under the premise of not increasing extra hardware, utilizes engine retard oil-break
Process cooperates control method of the invention to realize the removing to carbon distribution in GPF, so that engine can have in high charcoal carrying capacity
Clear charcoal is imitated, while GPF can also be protected not damage because regeneration temperature is excessively high, to ensure that the service life of GPF.
Detailed description of the invention
Fig. 1 is a kind of control stream of gasoline engine grain catcher DECEL ENLEAN regeneration hierarchical control method of the embodiment of the present invention
Journey schematic diagram；
Fig. 2 is a kind of control stream of gasoline engine grain catcher DECEL ENLEAN regeneration hierarchical control method of the embodiment of the present invention
Journey schematic diagram.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, not
For limiting the present invention.
As shown in Figure 1, specific control process of the invention is as follows:
1, currently add up charcoal carrying capacity to GPF first correctly to be estimated, each operating point is obtained based on running operating point
The tired charcoal rate in basis, then establishes empirical equation to each operating point to it and is modified using air-fuel ratio, coolant water temperature, current tired
Carbon distribution carrying capacity C=cold start charcoal carrying capacity+stable state charcoal carrying capacity * water temperature/air-fuel ratio correction, extrapolates current tired charcoal situation, wherein
Cold start charcoal carrying capacity, stable state charcoal carrying capacity, water temperature are read by the monitoring system being arranged in vehicle body and are transmitted to vehicle-mounted ECU.
2, according to the state of charcoal carrying capacity, control area is divided by fuel cut-off control with charcoal carrying capacity limit value Limit1 and Limit2
Three, it is lower than limit value Limit1, is higher than limit value Limit1 and is lower than Limit2, higher than the Limit2 of limit value, Limit1 is defined as GPF
The oil-break time can be infinitely great charcoal carrying capacity limit value, Limit2 is defined as the charcoal carrying capacity limit value entirely without method oil-break, Limit1 and
The value of Limit2 regards specific GPF exemplar characteristic and determines；Limit1 and Limit2 be all by test obtain, wherein
The definition of Limit2: Limit2 is the upper-bound theory carbon carrying capacity accumulated in GPF, when the fuel delivery of engine is disconnected
When opening, when upper-bound theory carbon carrying capacity is burnt, the real time temperature of GPF is more than the permission temperature of GPF.
The definition of Limit1: Limit1 is the lower limit theory carbon carrying capacity accumulated in GPF, when lower limit theory carbon carrying capacity is fired
It burns, the GPF inlet temperature after remaining lower limit theory carbon carrying capacity is no more than GPF accumulation carbon carrying capacity standard and burns after burning does not surpass
Cross GPF maximum permissible temperature.
It the following is the permission charcoal carrying capacity put between Limit1-Limit2 and calculate theoretical formula:
Currently allow charcoal carrying capacity=(GPF maximum permissible temperature-GPF Current Temperatures) the * GPF that burns
Quality * GPF specific heat capacity/charcoal calorific value
The oil-break time=charcoal carrying capacity * unit charcoal the oxygen demand that currently allows to burn/oxygen supply speed
Rate
3, with the increase of charcoal carrying capacity, when charcoal carrying capacity is lower than limit value Limit1, DECEL ENLEAN is unrestricted, when charcoal carrying capacity is super
When crossing Limit1 and being lower than Limit2, burning charcoal carrying capacity is allowed to calculate the air capacity that oil-break allows access into according to what is calculated in real time
To control the oil-break time, according to the charcoal in air capacity burning GPF, GPF overtemperature is avoided in the case where effectively removing charcoal, when
Charcoal carrying capacity forbids oil-break when being higher than limit value Limit2.
The above is only a specific embodiment of the invention, but scope of protection of the present invention is not limited thereto, any to be familiar with
Within the technical scope disclosed by the invention, any changes or substitutions that can be easily thought of by those skilled in the art, should all cover
Within protection scope of the present invention.Therefore, protection scope of the present invention should be with protection scope defined by claims
It is quasi-.
Claims (10)
1. a kind of gasoline engine grain catcher DECEL ENLEAN regenerates hierarchical control method, it is characterised in that: it is subtracted by engine
Quick-break oil process realizes the removing of carbon distribution in gasoline engine grain catcher, and vehicle-mounted ECU judges whether according to current accumulation carbon carrying capacity
The fuel delivery for allowing to disconnect engine, when allowing to disconnect the fuel delivery of engine, vehicle-mounted ECU, which utilizes, currently to be allowed to burn
Charcoal carrying capacity calculates the disconnection duration of the fuel delivery of engine.
2. a kind of gasoline engine grain catcher DECEL ENLEAN according to claim 1 regenerates hierarchical control method, feature
It is:
The calculation formula of current accumulation carbon carrying capacity is as follows,
Current accumulation carbon carrying capacity=cold start charcoal carrying capacity+stable state charcoal carrying capacity * water temperature/air-fuel ratio correction.
3. a kind of gasoline engine grain catcher DECEL ENLEAN according to claim 1 regenerates hierarchical control method, feature
It is:
When allowing to disconnect the fuel delivery of engine, including following two operating condition: fuel delivery allows turn-off time unrestricted
Allow turn-off time limited with fuel delivery.
4. a kind of gasoline engine grain catcher DECEL ENLEAN according to claim 3 regenerates hierarchical control method, feature
It is:
The condition that the fuel delivery of engine allows turn-off time unrestricted is: current accumulation carbon carrying capacity≤Limit1,
Limit1's is defined as: Limit1 is the lower limit theory carbon carrying capacity accumulated in GPF, when lower limit theory carbon carrying capacity is fired completely
It burns, will not make GPF body temperature is more than GPF maximum permissible temperature.
5. a kind of gasoline engine grain catcher DECEL ENLEAN according to claim 3 regenerates hierarchical control method, feature
It is:
The condition that the fuel delivery of engine allows turn-off time limited is: current accumulation carbon carrying capacity > Limit1,
Limit1's is defined as: Limit1 is the lower limit theory carbon carrying capacity accumulated in GPF, when lower limit and following theoretical carbon carrying capacity
Completely burned, will not make GPF inlet temperature is more than GPF maximum permissible temperature.
6. a kind of gasoline engine grain catcher DECEL ENLEAN according to claim 1 regenerates hierarchical control method, feature
It is:
The calculation formula of the disconnection duration of the fuel delivery of engine is as follows:
Currently allow to burn charcoal carrying capacity=(GPF maximum permissible temperature-GPF Current Temperatures) * GPF mass * GPF specific heat capacity/charcoal heat
Value；
The disconnection duration of the fuel delivery of the engine=charcoal carrying capacity * unit charcoal oxygen demand that currently allows to burn/oxygen supply
Rate.
7. a kind of gasoline engine grain catcher DECEL ENLEAN according to claim 1 regenerates hierarchical control method, feature
It is:
The fuel delivery of engine forbids the condition disconnected to be: current accumulation carbon carrying capacity >=Limit2,
Limit2's is defined as: Limit2 is the upper-bound theory carbon carrying capacity accumulated in GPF, when the fuel delivery of engine disconnects
When, when upper-bound theory carbon carrying capacity is burnt, the real time temperature of GPF is more than the permission temperature of GPF.
8. a kind of gasoline engine grain catcher DECEL ENLEAN according to claim 1 regenerates hierarchical control method, feature
Be: being preset with following parameter value in the vehicle-mounted ECU: GPF maximum permissible temperature, GPF mass, GPF specific heat capacity, charcoal calorific value,
Limit1 and Limit2.
9. a kind of gasoline engine grain catcher DECEL ENLEAN according to claim 1 regenerates hierarchical control method, feature
It is:
Specific step is as follows for it,
Step 1 calculates in gasoline engine grain catcher and currently accumulates carbon carrying capacity C；
Control area is divided into three regions using charcoal carrying capacity limit value Limit1 and Limit2 by step 2:
The disconnection duration of X≤Limit1, the fuel delivery of engine are unrestricted；
The disconnection duration of Limit1 < X < Limit2, the fuel delivery of engine are limited；
Limit2≤X continually develops the fuel delivery of motivation；
Whether step 3 disconnects the fuel delivery of engine according to the region decision by C assignment in X, and utilization currently allows to fire
Carrying capacity of making charcoal calculates the disconnection duration of the fuel delivery of engine.
10. a kind of gasoline engine grain catcher DECEL ENLEAN generation control system, it is characterised in that: include:
ECU control module, receives temperature detection and carbon carrying capacity detects signal, determines whether to break according to current accumulation carbon carrying capacity
The fuel delivery started the engine, calculates the disconnection duration of the fuel delivery of engine, and issues control instruction to executing agency；
Temperature detecting module, for real-time detection gasoline engine grain catcher Current Temperatures and be sent to ECU control module；
Carbon carrying capacity detection module, for real-time detection gasoline engine grain catcher current accumulation carbon carrying capacity and be sent to ECU control
Molding block；
Executing agency, it is unrestricted that the fuel delivery for controlling engine according to unrestricted signal disconnects duration；For according to disconnected
The fuel delivery opened constrained signal and disconnect duration signal control engine disconnects duration；Forbid cut-off signal control for basis
The fuel delivery of engine is forbidden disconnecting.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110925065A (en) * | 2019-12-17 | 2020-03-27 | 东风汽车集团有限公司 | Active regeneration grading control method for particle catcher |
| CN111691958A (en) * | 2020-07-31 | 2020-09-22 | 江铃汽车股份有限公司 | Adaptive regeneration control strategy for gasoline particulate filter |
| CN112051077A (en) * | 2020-09-25 | 2020-12-08 | 东风汽车集团有限公司 | GPF reliability test method for whole passenger vehicle |
| CN112343693A (en) * | 2020-09-21 | 2021-02-09 | 东风汽车集团有限公司 | GPF carbon capacity partition estimation method |
| CN112761759A (en) * | 2021-02-01 | 2021-05-07 | 联合汽车电子有限公司 | Method for controlling gasoline engine particle trap fuel cut-off regeneration based on temperature model |
| CN113609437A (en) * | 2021-08-23 | 2021-11-05 | 安徽江淮汽车集团股份有限公司 | Gasoline engine GPF accumulated carbon calculation method |
| CN113756917A (en) * | 2020-06-05 | 2021-12-07 | 比亚迪股份有限公司 | Tail gas treatment method and device and vehicle |
| CN113847126A (en) * | 2021-09-10 | 2021-12-28 | 东风汽车集团股份有限公司 | Hybrid vehicle, ECU thereof, and method and device for controlling passive regeneration of GPF |
| CN114687874A (en) * | 2020-12-29 | 2022-07-01 | 北汽福田汽车股份有限公司 | Regeneration control method, device, medium, equipment and vehicle of particulate matter trap |
| CN114837834A (en) * | 2022-04-18 | 2022-08-02 | 东风柳州汽车有限公司 | Engine fuel cut-off control method, device, equipment and storage medium |
| CN115434792A (en) * | 2021-08-26 | 2022-12-06 | 广州汽车集团股份有限公司 | Active regeneration control method and system for gasoline engine particle catcher |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110925065A (en) * | 2019-12-17 | 2020-03-27 | 东风汽车集团有限公司 | Active regeneration grading control method for particle catcher |
| CN113756917A (en) * | 2020-06-05 | 2021-12-07 | 比亚迪股份有限公司 | Tail gas treatment method and device and vehicle |
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| CN114687874A (en) * | 2020-12-29 | 2022-07-01 | 北汽福田汽车股份有限公司 | Regeneration control method, device, medium, equipment and vehicle of particulate matter trap |
| CN112761759B (en) * | 2021-02-01 | 2022-03-15 | 联合汽车电子有限公司 | Method for controlling gasoline engine particle trap fuel cut-off regeneration based on temperature model |
| CN112761759A (en) * | 2021-02-01 | 2021-05-07 | 联合汽车电子有限公司 | Method for controlling gasoline engine particle trap fuel cut-off regeneration based on temperature model |
| CN113609437A (en) * | 2021-08-23 | 2021-11-05 | 安徽江淮汽车集团股份有限公司 | Gasoline engine GPF accumulated carbon calculation method |
| CN113609437B (en) * | 2021-08-23 | 2024-03-29 | 安徽江淮汽车集团股份有限公司 | Gasoline engine GPF carbon accumulation calculation method |
| CN115434792A (en) * | 2021-08-26 | 2022-12-06 | 广州汽车集团股份有限公司 | Active regeneration control method and system for gasoline engine particle catcher |
| CN115434792B (en) * | 2021-08-26 | 2023-08-15 | 广州汽车集团股份有限公司 | Active regeneration control method and system for gasoline engine particle catcher |
| CN113847126A (en) * | 2021-09-10 | 2021-12-28 | 东风汽车集团股份有限公司 | Hybrid vehicle, ECU thereof, and method and device for controlling passive regeneration of GPF |
| CN113847126B (en) * | 2021-09-10 | 2022-09-27 | 东风汽车集团股份有限公司 | Hybrid vehicle, ECU thereof, and method and device for controlling passive regeneration of GPF |
| CN114837834A (en) * | 2022-04-18 | 2022-08-02 | 东风柳州汽车有限公司 | Engine fuel cut-off control method, device, equipment and storage medium |
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Application publication date: 20190322 |