CN105715393B - A kind of non-cooled EGR control method, device and engine - Google Patents
A kind of non-cooled EGR control method, device and engine Download PDFInfo
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- CN105715393B CN105715393B CN201610089564.6A CN201610089564A CN105715393B CN 105715393 B CN105715393 B CN 105715393B CN 201610089564 A CN201610089564 A CN 201610089564A CN 105715393 B CN105715393 B CN 105715393B
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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
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D41/0047—Controlling exhaust gas recirculation [EGR]
- F02D41/0065—Specific aspects of external EGR control
-
- 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
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D41/0047—Controlling exhaust gas recirculation [EGR]
- F02D41/0065—Specific aspects of external EGR control
- F02D41/0072—Estimating, calculating or determining the EGR rate, amount or flow
-
- 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
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D41/0047—Controlling exhaust gas recirculation [EGR]
- F02D41/0077—Control of the EGR valve or actuator, e.g. duty cycle, closed loop control of position
-
- 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
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D41/0047—Controlling exhaust gas recirculation [EGR]
- F02D41/0065—Specific aspects of external EGR control
- F02D2041/0067—Determining the EGR temperature
-
- 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
- F02D2200/04—Engine intake system parameters
- F02D2200/0406—Intake manifold pressure
-
- 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
- F02D2200/04—Engine intake system parameters
- F02D2200/0414—Air temperature
-
- 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
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D41/1446—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being exhaust temperatures
-
- 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
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D41/1448—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an exhaust gas pressure
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust-Gas Circulating Devices (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
The present invention provides a kind of non-cooled EGR control methods, comprising: obtains intake and exhaust pressure difference when exhaust gas discharge；Obtain EGR valve aperture when exhaust gas discharge；It according to the intake and exhaust pressure difference and the EGR valve aperture, is composed by EGR exhaust flow arteries and veins, obtains the exhaust gas flow for entering back into engine when exhaust gas discharge.The present invention also provides a kind of non-cooled EGR control device and include the engine of the device, wherein described device includes first acquisition unit, second acquisition unit and calibration unit.The present invention can satisfy application requirement when six non-cooled EGR engine heating mode of Europe, guarantees that the stability of engine and control precision can effectively promote engine exhaust temperature at the same time, reduces NOx emission, reduce SCR and crystallize risk.
Description
Technical field
The present invention relates to engine art more particularly to a kind of non-cooled EGR control methods, device and engine.
Background technique
Particle PM and nitrogen oxide NOx caused by diesel engine are two kinds of most important pollutants in discharge.Currently, Europe six
Every kilometer of soot emissions of standard diesel engine running car are lower than 5 milligrams, and nitric oxide discharge is lower than 80 milligrams, and tail gas is dirty
Dye object discharge has dropped down to the level almost not measured.As emission regulation demands are increasingly stringenter, diesel exhaust gas heat management skill
Art is more and more widely used.
In the prior art, exhaust gas treating method mainly includes cooling exhaust gas recirculatioon EGR (Exhaut Gas
) and high-efficient selective catalytic reduction method SCR (Selective Catalytic Reduction) Recirculation.Such as Fig. 3
Shown, in cooling EGR method, the main function of cooler for recycled exhaust gas, which is to cool down by coolant liquid, participates in the useless of recycle burning
Gas is reduced the exhaust gas temperature into cylinder.In cooling EGR method, the exhaust gas temperature after reduction is not able to satisfy subsequent SCR
There is crystallization risk in high transformation efficiency temperature requirements, SCR, at the same time, the discharge amount of NOx is higher.
Summary of the invention
For the defects in the prior art, the present invention provides a kind of non-cooled EGR control method, device and engine,
For meeting the application requirement of the non-cooled EGR engine heating mode in Europe six, guaranteeing the stability of engine and controlling precision, with
, meanwhile, it is capable to effectively promote engine exhaust temperature, reduction NOx emission reduces SCR and crystallizes risk for this.
On the one hand, the present invention provides a kind of non-cooled EGR control methods, which comprises
Obtain intake and exhaust pressure difference when exhaust gas discharge；
Obtain EGR valve aperture when exhaust gas discharge；
It according to the intake and exhaust pressure difference and the EGR valve aperture, is composed by EGR exhaust flow arteries and veins, obtains exhaust gas discharge
When enter back into the exhaust gas flow of engine.
Preferably, the intake and exhaust pressure difference obtained when exhaust gas is discharged, comprising:
In exhaust gas discharge, exhaust pressure value and air inlet pressure force value are obtained；
According to the exhaust pressure value and the air inlet pressure force value, obtain intake and exhaust pressure difference when exhaust gas discharge, it is described into
It is vented the difference that pressure difference is the exhaust pressure value and the air inlet pressure force value.
Preferably, after entering back into the exhaust gas flow of engine when obtaining exhaust gas discharge, the method also includes:
In exhaust gas discharge, exhaust gas temperature value is obtained；
According to the exhaust gas flow and the exhaust gas temperature value, by temperature correction coefficient, when obtaining exhaust gas discharge again into
Enter the first amendment exhaust gas flow of engine.
Preferably, it is entered back into when obtaining exhaust gas and being discharged after the first amendment exhaust gas flow of engine, the method is also
Include:
It enters back into and starts when obtaining exhaust gas discharge by air inflow fair curve according to the first amendment exhaust gas flow
Second amendment exhaust gas flow of machine；
Wherein, the air inflow fair curve is according to pressure and air inlet before pressure before whirlpool and admission pressure setting value and whirlpool
Pressure measured value obtains.
Preferably, the method also includes:
Obtain inlet air temperature value；
The inlet air temperature value is compared with preset threshold；
If the inlet air temperature value is greater than preset threshold, by the aperture regulation of EGR valve to default substitution value.
On the other hand, the present invention provides a kind of non-cooled EGR control device, described device includes:
First acquisition unit, for obtaining intake and exhaust pressure difference when exhaust gas discharge；
Second acquisition unit, for obtaining EGR valve aperture when exhaust gas discharge；
Unit is demarcated, for being composed by EGR exhaust flow arteries and veins according to the intake and exhaust pressure difference and the EGR valve aperture,
Obtain the exhaust gas flow that engine is entered back into when exhaust gas discharge.
Preferably, described device further includes the first amending unit, is specifically used for,
In exhaust gas discharge, exhaust gas temperature value is obtained；
According to the exhaust gas flow and the exhaust gas temperature value, by temperature correction coefficient, when obtaining exhaust gas discharge again into
Enter the first amendment exhaust gas flow of engine.
Preferably, described device further includes the second amending unit, is specifically used for,
It enters back into and starts when obtaining exhaust gas discharge by air inflow fair curve according to the first amendment exhaust gas flow
Second amendment exhaust gas flow of machine；
Wherein, the air inflow fair curve is according to pressure and air inlet before pressure before whirlpool and admission pressure setting value and whirlpool
Pressure measured value obtains.
Preferably, described device further includes protection location, is specifically used for,
Obtain inlet air temperature value；
The inlet air temperature value is compared with preset threshold；
If the inlet air temperature value is greater than preset threshold, by the aperture regulation of EGR valve to default substitution value.
In another aspect, the present invention provides a kind of engine, including air filter, booster, air inlet restriction valve TV, in it is cold
Device, EGR valve, motor, oxidation catalytic converter DOC, particle trapper DPF, selective catalytic reduction SCR, silencer and
Pipeline, the engine further include a kind of non-cooled EGR control device.
As shown from the above technical solution, the present invention provides a kind of non-cooled EGR control method, device and engine, roots
Intake and exhaust pressure difference and EGR valve aperture when being discharged according to exhaust gas, by EGR exhaust flow arteries and veins compose, obtain exhaust gas discharge when again into
Enter the exhaust gas flow of engine.The present invention can satisfy application requirement when six non-cooled EGR engine heating mode of Europe, guarantee
The stability and control precision of engine can effectively promote engine exhaust temperature at the same time, reduce NOx emission, reduce
SCR crystallizes risk.
Detailed description of the invention
In order to illustrate more clearly of the embodiment of the present disclosure or technical solution in the prior art, 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
Disclosed some embodiments for those of ordinary skill in the art without creative efforts, can be with
Other attached drawings are obtained according to these figures.
Fig. 1 is a kind of flow diagram for non-cooled EGR control method that one embodiment of the invention provides；
Fig. 2 is a kind of structural schematic diagram for non-cooled EGR control device that one embodiment of the invention provides；
Fig. 3 is a kind of structural schematic diagram for engine that one embodiment of the invention provides；
Fig. 4 is the structural schematic diagram of cooling EGR engine in the prior art；
Fig. 5 is the schematic diagram of non-cooled EGR control method provided by the invention；
Fig. 6 is the schematic diagram of non-cooled EGR engine guard method provided by the invention.
Specific embodiment
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
Site preparation 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
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Partial words as mentioned in the embodiments of the present invention are illustrated below.
It is cold that non-cooled EGR (Exhaust Gas Recirculation) refers to that EGR gas is carried out without subcooler
But and being introduced directly into air inlet pipe makes it burn once again；TV (Throttle Valve) refers to air inlet restriction valve, for controlling
Engine new charge amount；DOC (Diesel Oxidation Catalyst) refers to oxidation catalytic converter, for aoxidizing HC
Improve delivery temperature；DPF (Diesel Particulate Filter) refers to particle trapper, in filtering exhaust
Grain object；SCR (Selective Catalyst Reduction) refers to selective recall reduction, for reducing engine NOx row
It puts；NOx refers to nitrogen oxides, one of engine exhaust ingredient；Heating mode: in engine low load region using related
Measure fast lifting delivery temperature is to meet the mode of SCR high transformation efficiency.
Fig. 1 shows a kind of flow diagram of non-cooled EGR control method of one embodiment of the invention offer, such as Fig. 1
Shown, this method comprises the following steps:
Intake and exhaust pressure difference when S1, acquisition exhaust gas discharge.
It is understood that intake and exhaust pressure difference is the difference of exhaust pressure value and air inlet pressure force value.Wherein, exhaust pressure value
For the gas pressure value of exhaust pipe, air inlet pressure force value is the gas pressure value of air inlet pipe.
Specifically, as shown in figure 3, the installation of back pressure transducer be it is selectable, when seated, exhaust pressure value
It is measured and is obtained by back pressure transducer；When being fitted without, exhaust pressure value is calculated by model and is obtained.Air inlet pressure force value
It is measured and is obtained by air inlet pressure sensor.
EGR valve aperture when S2, acquisition exhaust gas discharge.
It is understood that the aperture of EGR valve determines the circulation area of EGR valve.Specifically, EGR valve is obtained
Aperture the circulation area of EGR valve is obtained according to valve signature curve.
S3, exhaust gas row is obtained by EGR exhaust flow arteries and veins spectrum according to the intake and exhaust pressure difference and the EGR valve aperture
The exhaust gas flow of engine is entered back into when out.
It is understood that pipeline area and intake and exhaust pressure difference can correspond to and flow through the pipeline when one timing of fluid temperature (F.T.)
Certain flow.As a result, according to the intake and exhaust pressure difference of acquisition and EGR valve aperture, composed by EGR exhaust flow arteries and veins, it is available
Flow through the exhaust gas flow of EGR valve.
Wherein, by demarcating the aperture of EGR valve, EGR is demarcated when corresponding EGR flow leads to area and intake and exhaust pressure difference
Exhaust gas flow arteries and veins spectrum.Further, the exhaust gas flow for flowing through EGR valve is to enter back into the waste gas stream that engine burns
Amount.
The present embodiment is mainly used for engine heating mode and promotes delivery temperature.Engine heating mode is concentrated mainly on low
NOx emission can be greatly lowered in the low row's temperature area of load, the present embodiment while promoting engine exhaust temperature, mitigate SCR
The burden of system will not influence engine emission existing and calculating new charge amount deviation.
In another embodiment provided by the invention, the method also includes following steps:
S4, the first amendment exhaust gas flow that engine is entered back into when exhaust gas discharge is obtained.
Specifically, step S4 includes the following steps:
In exhaust gas discharge, exhaust gas temperature value is obtained；
According to the exhaust gas flow and the exhaust gas temperature value, by temperature correction coefficient, when obtaining exhaust gas discharge again into
Enter the first amendment exhaust gas flow of engine.
It is understood that passing through temperature adjustmemt as shown in figure 5, when the temperature is changed, the density of gas can change
Coefficient is modified exhaust gas flow, guarantees the accuracy of exhaust gas flow.
Specifically, as shown in figure 3, the installation of exhaust gas temperature sensor be it is selectable, when seated, exhaust gas temperature value
It is measured and is obtained by exhaust gas temperature sensor；When being fitted without, exhaust gas temperature value is calculated by model and is obtained.
S5, the second amendment exhaust gas flow that engine is entered back into when exhaust gas discharge is obtained.
Specifically, step S5 includes the following steps:
It enters back into and starts when obtaining exhaust gas discharge by air inflow fair curve according to the first amendment exhaust gas flow
Second amendment exhaust gas flow of machine；
Wherein, the air inflow fair curve is according to pressure and air inlet before pressure before whirlpool and admission pressure setting value and whirlpool
Pressure measured value obtains.
It is understood that and increasing as shown in figure 5, exhaust gas flow is mainly influenced by circulation area and driving pressure difference
The consistency of depressor, EGR valve and pipeline influences whether the computational accuracy of exhaust gas flow.When EGR valve is closed, whirlpool is demarcated
Preceding pressure/admission pressure setting value arteries and veins is composed, pressure and admission pressure before whirlpool when acquiring different EGR valve apertures under different operating conditions
It is worth and measures and calculates new charge amount, air inflow fair curve is fitted by relevant calculation, guarantees the normal work of EGR valve
The accuracy of new charge amount is calculated when making.
In another embodiment provided by the invention, the method also includes following steps:
If S6, the inlet air temperature value are greater than preset threshold, by the aperture regulation of EGR valve to default substitution value.
Specifically, step S6 includes the following steps:
Obtain inlet air temperature value；
The inlet air temperature value is compared with preset threshold；
If the inlet air temperature value is greater than preset threshold, by the aperture regulation of EGR valve to default substitution value.
It is understood that working as air inlet as shown in fig. 6, judge whether engine exception occurs by intake air temperature signals
When temperature exceeds a certain limit value, to prevent temperature is excessively high from leading to sensor degradation or engine performance deterioration, EGR valve is controlled at this time
Aperture eliminates influence of the egr system to engine, to substitution value to carry out the investigation of relevant issues.
The present embodiment can satisfy application requirement when six non-cooled EGR engine heating mode of Europe, guarantee engine
Stability and control precision can effectively promote engine exhaust temperature at the same time, reduce NOx emission, reduce SCR crystallization
Risk.
Fig. 2 shows a kind of structural schematic diagram for non-cooled EGR control device that one embodiment of the invention provides, such as Fig. 2
Shown, which includes first acquisition unit 21, second acquisition unit 22 and calibration unit 23.Wherein:
First acquisition unit 21, for obtaining intake and exhaust pressure difference when exhaust gas discharge；
Second acquisition unit 22, for obtaining EGR valve aperture when exhaust gas discharge；
Unit 23 is demarcated, for passing through EGR exhaust flow arteries and veins according to the intake and exhaust pressure difference and the EGR valve aperture
Spectrum obtains the exhaust gas flow that engine is entered back into when exhaust gas discharge.
In the present embodiment, described device further includes the first amending unit, is specifically used for,
In exhaust gas discharge, exhaust gas temperature value is obtained；
According to the exhaust gas flow and the exhaust gas temperature value, by temperature correction coefficient, when obtaining exhaust gas discharge again into
Enter the first amendment exhaust gas flow of engine.
In the present embodiment, described device further includes the second amending unit, is specifically used for,
It enters back into and starts when obtaining exhaust gas discharge by air inflow fair curve according to the first amendment exhaust gas flow
Second amendment exhaust gas flow of machine；
Wherein, the air inflow fair curve is according to pressure and air inlet before pressure before whirlpool and admission pressure setting value and whirlpool
Pressure measured value obtains.
In the present embodiment, described device further includes protection location, is specifically used for,
Obtain inlet air temperature value；
The inlet air temperature value is compared with preset threshold；
If the inlet air temperature value is greater than preset threshold, by the aperture regulation of EGR valve to default substitution value.
The present embodiment can satisfy application requirement when six non-cooled EGR engine heating mode of Europe, guarantee engine
Stability and control precision can effectively promote engine exhaust temperature at the same time, reduce NOx emission, reduce SCR crystallization
Risk.
Fig. 3 shows a kind of structural schematic diagram of engine of one embodiment of the invention offer, as shown in figure 3, this starts
Machine includes air filter, booster, air inlet restriction valve TV, intercooler, EGR valve, motor, oxidation catalytic converter DOC, micro-
Grain trap DPF, selective catalytic reduction SCR, silencer and pipeline, the engine further include non-cooled EGR control device.
The present embodiment guarantees the control precision and right when the application of non-cooled egr system by non-cooled EGR control device
The protection of engine can satisfy requirement without increasing any components.Compared with cooling EGR method, it is cooling to remove EGR
Device reduces engine component, improves engine reliability.Compared with efficient SCR technology, promoted in engine low load region
NOx emission is greatly lowered while row's temperature, reduces crystallization risk.
In the description of the present invention it should be noted that the orientation or positional relationship of the instructions such as term " on ", "lower" is base
In orientation or positional relationship shown in the drawings, it is merely for convenience of description of the present invention and simplification of the description, rather than indication or suggestion
Signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to this
The limitation of invention.Unless otherwise clearly defined and limited, term " installation ", " connected ", " connection " shall be understood in a broad sense, example
Such as, it may be fixed connection or may be dismantle connection, or integral connection；It can be mechanical connection, be also possible to be electrically connected
It connects；It can be directly connected, the connection inside two elements can also be can be indirectly connected through an intermediary.For this
For the those of ordinary skill in field, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
It should also be noted that, herein, relational terms such as first and second and the like are used merely to one
Entity or operation are distinguished with another entity or operation, without necessarily requiring or implying between these entities or operation
There are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant are intended to contain
Lid non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
The above embodiments are only used to illustrate the present invention, and not limitation of the present invention, in relation to the common of technical field
Technical staff can also make a variety of changes and modification without departing from the spirit and scope of the present invention, therefore all
Equivalent technical solution also belongs to scope of the invention, and scope of patent protection of the invention should be defined by the claims.
Claims (6)
1. a kind of non-cooled EGR control method, which is characterized in that the described method includes:
Obtain intake and exhaust pressure difference when exhaust gas discharge；
Obtain EGR valve aperture when exhaust gas discharge；
It according to the intake and exhaust pressure difference and the EGR valve aperture, is composed, is obtained when exhaust gas is discharged again by EGR exhaust flow arteries and veins
Into the exhaust gas flow of engine；
After entering back into the exhaust gas flow of engine when obtaining exhaust gas discharge, the method also includes:
In exhaust gas discharge, exhaust gas temperature value is obtained；
Hair is entered back into when obtaining exhaust gas discharge by temperature correction coefficient according to the exhaust gas flow and the exhaust gas temperature value
First amendment exhaust gas flow of motivation；
It is entered back into when obtaining exhaust gas and being discharged after the first amendment exhaust gas flow of engine, the method also includes:
Engine is entered back into when obtaining exhaust gas discharge by air inflow fair curve according to the first amendment exhaust gas flow
Second amendment exhaust gas flow；
Wherein, the air inflow fair curve is according to pressure and admission pressure before pressure before whirlpool and admission pressure setting value and whirlpool
Measured value obtains.
2. the method according to claim 1, wherein the intake and exhaust pressure difference obtained when exhaust gas is discharged, comprising:
In exhaust gas discharge, exhaust pressure value and air inlet pressure force value are obtained；
According to the exhaust pressure value and the air inlet pressure force value, intake and exhaust pressure difference when exhaust gas discharge, the intake and exhaust are obtained
Pressure difference is the difference of the exhaust pressure value and the air inlet pressure force value.
3. -2 described in any item methods according to claim 1, which is characterized in that the method also includes:
Obtain inlet air temperature value；
The inlet air temperature value is compared with preset threshold；
If the inlet air temperature value is greater than preset threshold, by the aperture regulation of EGR valve to default substitution value.
4. a kind of non-cooled EGR control device, which is characterized in that described device includes:
First acquisition unit, for obtaining intake and exhaust pressure difference when exhaust gas discharge；
Second acquisition unit, for obtaining EGR valve aperture when exhaust gas discharge；
Unit is demarcated, for being composed by EGR exhaust flow arteries and veins according to the intake and exhaust pressure difference and the EGR valve aperture, is obtained
Exhaust gas enters back into the exhaust gas flow of engine when being discharged；
Described device further includes the first amending unit, is specifically used for,
In exhaust gas discharge, exhaust gas temperature value is obtained；
Hair is entered back into when obtaining exhaust gas discharge by temperature correction coefficient according to the exhaust gas flow and the exhaust gas temperature value
First amendment exhaust gas flow of motivation；
Described device further includes the second amending unit, is specifically used for,
Engine is entered back into when obtaining exhaust gas discharge by air inflow fair curve according to the first amendment exhaust gas flow
Second amendment exhaust gas flow；
Wherein, the air inflow fair curve is according to pressure and admission pressure before pressure before whirlpool and admission pressure setting value and whirlpool
Measured value obtains.
5. device according to claim 4, which is characterized in that described device further includes protection location, is specifically used for,
Obtain inlet air temperature value；
The inlet air temperature value is compared with preset threshold；
If the inlet air temperature value is greater than preset threshold, by the aperture regulation of EGR valve to default substitution value.
6. a kind of engine, including air filter, booster, air inlet restriction valve TV, intercooler, EGR valve, motor, oxidation
Catalyst DOC, particle trapper DPF, selective catalytic reduction SCR, silencer and pipeline, which is characterized in that the hair
Motivation further includes according to the described in any item devices of claim 4~5.
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| CN201610089564.6A CN105715393B (en) | 2016-02-17 | 2016-02-17 | A kind of non-cooled EGR control method, device and engine |
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| CN201610089564.6A CN105715393B (en) | 2016-02-17 | 2016-02-17 | A kind of non-cooled EGR control method, device and engine |
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| CN112780455A (en) * | 2021-03-05 | 2021-05-11 | 温州市温纳汽车配件有限公司 | EGR valve control method for engine |
| CN113756998A (en) * | 2021-09-02 | 2021-12-07 | 宁波协诚电动工具有限公司 | Method for acquiring air flow and commercial vehicle |
| CN116150894B (en) * | 2023-04-19 | 2023-07-18 | 潍柴动力股份有限公司 | Design method of exhaust gas emission pipeline, exhaust gas emission pipeline and vehicle |
| CN117432539B (en) * | 2023-12-18 | 2024-03-19 | 潍柴动力股份有限公司 | Opening control method and device of EGR (exhaust gas Recirculation) system, electronic equipment and storage medium |
| CN117418947B (en) * | 2023-12-18 | 2024-04-16 | 潍柴动力股份有限公司 | Control method and device of EGR (exhaust gas Recirculation) system, electronic equipment and storage medium |
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