CN109209584A - Engine DPF tires out carbon rate modifying system and adjusting method - Google Patents
Engine DPF tires out carbon rate modifying system and adjusting method Download PDFInfo
- Publication number
- CN109209584A CN109209584A CN201811032329.0A CN201811032329A CN109209584A CN 109209584 A CN109209584 A CN 109209584A CN 201811032329 A CN201811032329 A CN 201811032329A CN 109209584 A CN109209584 A CN 109209584A
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- CN
- China
- Prior art keywords
- engine
- solenoid valve
- dpf
- oxygen concentration
- air inlet
- 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.)
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Classifications
-
- 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
-
- 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
- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
-
- 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
-
- 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
- F01N3/04—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust using liquids
-
- 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
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/14—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust gas
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention discloses a kind of engine DPF to tire out carbon rate modifying system and adjusting method, wherein the regulating system includes test DPF, oxygen concentration sensor, solenoid valve and main control unit；Wherein, test DPF is connected to the gas exhaust piping of engine, oxygen concentration sensor is arranged in engine and tests on the gas exhaust piping between DPF, gas exhaust piping between the air inlet of solenoid valve and oxygen concentration sensor and test DPF is connected to, and the gas outlet of solenoid valve is connected to the air inlet pipeline of engine；Main control unit is used to receive the oxygen concentration signals that oxygen concentration sensor is sent, and the aperture of solenoid valve is controlled according to oxygen concentration signals.Engine DPF provided by the invention tires out carbon rate modifying system and adjusting method, by controlling electromagnetism valve opening according to oxygen concentration in Engine exhaust pipeline, portion in gas exhaust piping is introduced into air inlet pipeline, to make soot concentration in gas exhaust piping be changed, and then realize the adjusting that DPF tires out carbon rate.
Description
Technical field
The present invention relates to engine exhaust technical field more particularly to a kind of engine DPF tire out carbon rate modifying system and
Adjusting method.
Background technique
With the development of the automobile industry and the promotion of environmental protection requirement, requirement of the country to motor vehicle emission be also increasingly
Height, the limit value of every pollutant requires also to be increasingly stringenter in emission regulation.Engine aftertreatment system is as external purification system
The important component of system plays an important role to the reduction of exhaust contaminant content.
Building block of the DPF as after-treatment system, effect are to reduce particle content in motor exhaust, these
Grain object is mainly the carbon soot particles generated after engine in-cylinder combustion.When the carbon soot particles of DPF caught inside reach certain value,
It will do it regenerative process, by carbon soot particles second-time burning.
DPF different tired carbon rates suffer from corresponding influence to the performance of engine and economy, and therefore, verifying is different
Tire out the DPF characteristic under carbon rate and how to realize that different tired carbon rates is highly important.
Summary of the invention
The object of the present invention is to provide a kind of engine DPF to tire out carbon rate modifying system and adjusting method, above-mentioned to solve
The problems of the prior art realize that DPF tires out the adjusting of carbon rate.
The present invention provides a kind of engine DPF to tire out carbon rate modifying system, wherein includes:
DPF is tested, is connected to the gas exhaust piping of engine；
Oxygen concentration sensor is arranged on the gas exhaust piping between the engine and the test DPF；
Exhaust between solenoid valve, the air inlet of the solenoid valve and the oxygen concentration sensor and the test DPF
Pipeline connection, the gas outlet of the solenoid valve are connected to the air inlet pipeline of engine；
Main control unit, the oxygen concentration signals sent for receiving the oxygen concentration sensor, and according to the oxygen
Concentration signal controls the aperture of the solenoid valve.
Engine DPF as described above tires out carbon rate modifying system, wherein and it further include filter preferably, the mistake
Filter is connected to the air inlet of the solenoid valve.
Engine DPF as described above tires out carbon rate modifying system, wherein and it further include water cooling exchanger preferably, institute
The air inlet for stating water cooling exchanger is connected to the gas outlet of the solenoid valve, the gas outlet of the water cooling exchanger and the air inlet
Pipeline connection.
The present invention also provides a kind of engine DPF to tire out carbon velocity regulating method, wherein includes the following steps:
Under electromagnetism valve closing state, the first oxygen density value in the gas exhaust piping of engine is detected；
Oxygen concentration targets threshold is set according to first oxygen density value；
Opens solenoid valve, make the portion in the gas exhaust piping after the solenoid valve with the air inlet pipe of engine
Fresh air mixing in road；
Detect the second oxygen density value in the gas exhaust piping；
Judge whether second oxygen density value is in the oxygen concentration targets threshold；
If so, the tired carbon rate of detection test DPF；
If not, adjusting the aperture of the solenoid valve.
Engine DPF as described above tires out carbon velocity regulating method, wherein preferably, before opens solenoid valve, also
Include:
Carbon particle filtering is carried out to by the portion before the solenoid valve.
Engine DPF as described above tires out carbon velocity regulating method, wherein preferably, after opens solenoid valve, also
Include:
It is cooled down to by the portion after the solenoid valve.
Engine DPF provided by the invention tires out carbon rate modifying system and adjusting method, by according to the exhaust pipe of engine
Oxygen concentration controls electromagnetism valve opening in road, the portion in gas exhaust piping is introduced air inlet pipeline, to make exhaust pipe
Soot concentration is changed in road, and then realizes the adjusting that DPF tires out carbon rate.
Detailed description of the invention
Specific embodiments of the present invention will be described in further detail with reference to the accompanying drawing.
Fig. 1 is the structural schematic diagram that engine DPF provided in an embodiment of the present invention tires out carbon rate modifying system.
Description of symbols:
100- main control unit 200- tests DPF
300- oxygen concentration sensor 400- solenoid valve
500- engine 600- filter
700- water cooling exchanger 800- gas exhaust piping
900- air inlet pipeline
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, and for explaining only the invention, and is not construed as limiting the claims.
As shown in Figure 1, the embodiment of the invention provides a kind of engine DPF to tire out carbon rate modifying system comprising test
DPF200, oxygen concentration sensor 300, solenoid valve 400 and main control unit 100；Wherein, test DPF200 and engine 500
Gas exhaust piping 800 is connected to, and oxygen concentration sensor 300 is arranged in engine 500 and tests the gas exhaust piping 800 between DPF200
On, the air inlet of solenoid valve 400 is connected to the gas exhaust piping 800 between oxygen concentration sensor 300 and test DPF200, electromagnetism
The gas outlet of valve 400 is connected to the air inlet pipeline 900 of engine 500；Main control unit 100 is for receiving oxygen concentration sensor
300 oxygen concentration signals sent, and according to the aperture of oxygen concentration signals control solenoid valve 400.
Under 400 closed state of solenoid valve, the exhaust gas that engine 500 is discharged under stationary conditions flows directly to test
DPF200, available one stable tired carbon rate.It, can be according to current exhaust pipeline 800 when needing to change tired carbon rate
Middle stable oxygen density value sets another aimed oxygen concn threshold value, and main control unit 100 controls solenoid valve 400 and opens, makes to arrange
Portion in air pipe 800 is mixed by solenoid valve 400 with the fresh air in the air inlet pipeline 900 of engine 500, together
When by the oxygen concentration in 300 real-time detection gas exhaust piping 800 of oxygen concentration sensor, set when oxygen concentration is not up to
When aimed oxygen concn threshold value, main control unit 100 can be adjusted the aperture of solenoid valve 400, with to passing through in the unit time
The amount for crossing the above-mentioned portion of solenoid valve 400 is controlled；When oxygen density value reaches the aimed oxygen concn threshold value of setting
When, the aperture of solenoid valve 400 no longer changes, and oxygen concentration tends towards stability, the tired carbon rate after being changed at this time.
Regulating system provided in this embodiment, which is realized, introduces air inlet pipeline 900 for the portion in gas exhaust piping 800,
Since the specific heat of combustion of exhaust gas is big, increase the specific heat of combustion of cylinder interior gas, while making by above-mentioned portion and air inlet pipeline 900
In fresh air mixing after the corresponding oxygen concentration of unit of fuel that is formed in gaseous mixture reduce, thus reduce burning velocity and
Ignition temperature limits the high temperature for being conducive to oxynitrides generation, oxygen-enriched condition, and then closes the nitrogen oxidation in exhaust
The amount of object is under control；And while the amount of oxynitrides reduces, the relatively burning of deterioration generates relatively more in cylinder
Carbon soot particles be changed the tired carbon rate for testing DPF200 from there through the change of carbon soot particles concentration.
Further, which further includes filter 600, and the air inlet of the filter 600 and solenoid valve 400 connects
It is logical, so as to be filtered to the particle in exhaust stream, to protect engine 500.
Further, which further includes water cooling exchanger 700, the air inlet and electromagnetism of the water cooling exchanger 700
The gas outlet of valve 400 is connected to, and the gas outlet of water cooling exchanger 700 is connected to air inlet pipeline 900；Water cooling exchanger 700 can be right
The gas for flowing through solenoid valve 400 cools down, and the gas after cooling and the fresh air in 500 air inlet pipeline 900 of engine are mixed
Enter in 500 cylinder of engine after conjunction and burn, it is possible thereby to reduce the burning velocity and ignition temperature in cylinder, makes to be conducive to nitrogen oxygen
The high temperature of compound generation, oxygen-enriched condition are limited, and then the amount of the oxynitrides in exhaust is made to be under control；And
While the amount of oxynitrides reduces, the burning of relatively deterioration generates relatively more carbon soot particles in cylinder, to make to survey
The tired carbon rate of examination DPF200 is changed.
The embodiment of the invention also provides a kind of engine DPF to tire out carbon velocity regulating method comprising following steps:
Step 1, under electromagnetism valve closing state, detect the first oxygen density value in the gas exhaust piping of engine.
Step 2 sets oxygen concentration targets threshold according to the first oxygen density value.
Step 3, opens solenoid valve, make the portion in gas exhaust piping after solenoid valve with the air inlet pipeline of engine
In fresh air mixing.
The second oxygen density value in step 4, detection gas exhaust piping.
Step 5 judges whether the second oxygen density value is in oxygen concentration targets threshold；If so, entering step 6；
If not, entering step 7.
The tired carbon rate of step 6, detection test DPF.Wherein, when the second oxygen density value is in oxygen concentration targets threshold
When interior, the aperture of solenoid valve no longer changes, and oxygen concentration tends towards stability, the tired carbon rate after being changed at this time.
Step 7, the aperture of electromagnetic valve for adjusting.Specifically, when oxygen concentration is not up to the aimed oxygen concn threshold value set
When, main control unit can be adjusted the aperture of solenoid valve, to the above-mentioned portion for passing through solenoid valve in the unit time
Amount controlled, and then the amount to the gaseous mixture obtained after being mixed by above-mentioned portion with the fresh air in air inlet pipeline
Controlled, the amount of gaseous mixture entered in engine cylinder be adjusted with realizing, so realize to in-cylinder combustion speed and
The control of ignition temperature.
Further, it before opens solenoid valve, further comprises the steps of:
Carbon particle filtering is carried out to by the portion before solenoid valve, to protect engine.Specifically, in this implementation
In example, carbon particle filtering can be carried out to by the portion before solenoid valve by DPF filter.
Further, it after opens solenoid valve, further comprises the steps of:
It is cooled down to by the portion after solenoid valve, so that in the gas and engine charge pipeline after cooling
Fresh air mixing after enter in engine cylinder and burn, it is possible thereby to reduce the burning velocity and ignition temperature in cylinder,
Make to be conducive to high temperature, oxygen-enriched condition that oxynitrides generates to be limited, and then measure the oxynitrides in exhaust
Control is arrived；And while the amount of oxynitrides reduces, relatively the burning of deterioration generates relatively more soots in cylinder
Grain, so that the tired carbon rate for testing DPF be made to be changed.It specifically, in the present embodiment, can be by water cooling exchanger to warp
The portion crossed after solenoid valve is cooled down.
Engine DPF provided in an embodiment of the present invention tires out carbon rate modifying system and adjusting method, by according to engine
Oxygen concentration controls electromagnetism valve opening in gas exhaust piping, the portion in gas exhaust piping is introduced air inlet pipeline, to make
Soot concentration is changed in gas exhaust piping, and then realizes the adjusting that DPF tires out carbon rate.
Structure, feature and effect of the invention, the above institute are described in detail based on the embodiments shown in the drawings
Only presently preferred embodiments of the present invention is stated, but the present invention does not limit the scope of implementation as shown in the drawings, it is all according to structure of the invention
Think made change or equivalent example modified to equivalent change, when not going beyond the spirit of the description and the drawings,
It should all be within the scope of the present invention.
Claims (6)
1. a kind of engine DPF tires out carbon rate modifying system characterized by comprising
DPF is tested, is connected to the gas exhaust piping of engine；
Oxygen concentration sensor is arranged on the gas exhaust piping between the engine and the test DPF；
Gas exhaust piping between solenoid valve, the air inlet of the solenoid valve and the oxygen concentration sensor and the test DPF
Connection, the gas outlet of the solenoid valve is connected to the air inlet pipeline of engine；
Main control unit, the oxygen concentration signals sent for receiving the oxygen concentration sensor, and according to the oxygen concentration
Signal controls the aperture of the solenoid valve.
2. engine DPF according to claim 1 tires out carbon rate modifying system, which is characterized in that it further include filter, institute
Filter is stated to be connected to the air inlet of the solenoid valve.
3. engine DPF according to claim 1 tires out carbon rate modifying system, which is characterized in that further include water cooling exchange
Device, the air inlet of the water cooling exchanger are connected to the gas outlet of the solenoid valve, the gas outlet of the water cooling exchanger and institute
State air inlet pipeline connection.
4. a kind of engine DPF tires out carbon velocity regulating method, which comprises the steps of:
Under electromagnetism valve closing state, the first oxygen density value in the gas exhaust piping of engine is detected；
Oxygen concentration targets threshold is set according to first oxygen density value；
Opens solenoid valve makes the portion in the gas exhaust piping after the solenoid valve and in the air inlet pipeline of engine
Fresh air mixing；
Detect the second oxygen density value in the gas exhaust piping；
Judge whether second oxygen density value is in the oxygen concentration targets threshold；
If so, the tired carbon rate of detection test DPF；
If not, adjusting the aperture of the solenoid valve.
5. engine DPF according to claim 4 tires out carbon velocity regulating method, which is characterized in that opens solenoid valve it
Before, further includes:
Carbon particle filtering is carried out to by the portion before the solenoid valve.
6. engine DPF according to claim 4 tires out carbon velocity regulating method, which is characterized in that opens solenoid valve it
Afterwards, further includes:
It is cooled down to by the portion after the solenoid valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811032329.0A CN109209584A (en) | 2018-09-05 | 2018-09-05 | Engine DPF tires out carbon rate modifying system and adjusting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811032329.0A CN109209584A (en) | 2018-09-05 | 2018-09-05 | Engine DPF tires out carbon rate modifying system and adjusting method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109209584A true CN109209584A (en) | 2019-01-15 |
Family
ID=64987536
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811032329.0A Pending CN109209584A (en) | 2018-09-05 | 2018-09-05 | Engine DPF tires out carbon rate modifying system and adjusting method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101839161A (en) * | 2009-03-18 | 2010-09-22 | 罗伯特.博世有限公司 | The identification of leaking in the automobile air system |
| US20110023590A1 (en) * | 2009-07-29 | 2011-02-03 | Ford Global Technologies, Llc | Method to detect and mitigate unsolicited exotherms in a diesel aftertreatment system |
| EP2455599A2 (en) * | 2010-11-18 | 2012-05-23 | Hyundai Motor Company | Method for predicting NOx amount and exhaust system using the same |
| US20140150760A1 (en) * | 2012-12-05 | 2014-06-05 | Ford Global Technologies, Llc | Methods and systems for a gas constituent sensor |
| CN105822399A (en) * | 2016-05-04 | 2016-08-03 | 山东大学 | Oxygenating type ammonia catalytic conversion system in aftertreatment of gas engine and control method |
| CN106351720A (en) * | 2016-11-30 | 2017-01-25 | 安徽江淮汽车集团股份有限公司 | Method and system for determining carbon accumulation amount of diesel particle trapper |
-
2018
- 2018-09-05 CN CN201811032329.0A patent/CN109209584A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101839161A (en) * | 2009-03-18 | 2010-09-22 | 罗伯特.博世有限公司 | The identification of leaking in the automobile air system |
| US20110023590A1 (en) * | 2009-07-29 | 2011-02-03 | Ford Global Technologies, Llc | Method to detect and mitigate unsolicited exotherms in a diesel aftertreatment system |
| EP2455599A2 (en) * | 2010-11-18 | 2012-05-23 | Hyundai Motor Company | Method for predicting NOx amount and exhaust system using the same |
| US20140150760A1 (en) * | 2012-12-05 | 2014-06-05 | Ford Global Technologies, Llc | Methods and systems for a gas constituent sensor |
| CN105822399A (en) * | 2016-05-04 | 2016-08-03 | 山东大学 | Oxygenating type ammonia catalytic conversion system in aftertreatment of gas engine and control method |
| CN106351720A (en) * | 2016-11-30 | 2017-01-25 | 安徽江淮汽车集团股份有限公司 | Method and system for determining carbon accumulation amount of diesel particle trapper |
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Address after: 230601 No. 99 Ziyun Road, Hefei Economic and Technological Development Zone, Anhui Province Applicant after: Anhui Jianghuai Automobile Group Limited by Share Ltd Address before: 230601 No. 669 Shixin Road, Taohua Industrial Park, Hefei City, Anhui Province Applicant before: Anhui Jianghuai Automobile Group Limited by Share Ltd |
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Application publication date: 20190115 |