CN106704041A - Control method and device for carbon tank desorption system and carbon tank electromagnetic valve - Google Patents
Control method and device for carbon tank desorption system and carbon tank electromagnetic valve Download PDFInfo
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- CN106704041A CN106704041A CN201510556438.2A CN201510556438A CN106704041A CN 106704041 A CN106704041 A CN 106704041A CN 201510556438 A CN201510556438 A CN 201510556438A CN 106704041 A CN106704041 A CN 106704041A
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- air
- fuel ratio
- numerical value
- diaphragm
- duty cycle
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Abstract
The invention discloses a control method for a carbon tank desorption system. The control method comprises the steps that the air-fuel ratio value, detected through an oxygen sensor, of waste gas in an exhaust pipe is obtained; a duty ratio signal corresponding to the air-fuel ratio value is determined; and the opening height of a membrane in a carbon tank electromagnetic valve is controlled according to the duty ratio signal. According to the method, the flow of gasoline steam can be accurately controlled, the air-fuel ratio of an engine is accurately controlled, and the work efficiency of the carbon tank desorption system is improved. The invention further discloses a control device for the carbon tank desorption system and the carbon tank electromagnetic valve.
Description
Technical field
The present invention relates to Vehicle Engineering, more particularly to a kind of control method of canister desorption system, control
Device processed and Valve EGR.
Background technology
Gasoline is a kind of volatile liquid, and fuel tank often fills up steam, fuel vaporization row at normal temperatures
The effect for putting control system is that steam is introduced into combustion chamber to participate in burning and preventing it from evaporateing into air.
What is played an important role during this is charcoal canister storage system, because activated carbon has adsorption function, when
Automobilism or it is flame-out when, the gasoline vapour of fuel tank enters the top of activated carbon canister by pipeline, fresh
Air then enters activated carbon canister from activated carbon canister bottom.Gasoline vapour is with fresh air is in in-tank mixing and stores
In there is activated carbon canister, the electromagnetism of the EVAP purifier between activated carbon canister and inlet manifold
Valve is opened, and the gasoline vapour in activated carbon canister is inhaled into inlet manifold and participates in burning.Wherein, canister electricity
Magnet valve is the automatically controlled parts that the vacuum of engine is guided to canister, by electronic control unit root
Controlled according to the operating mode of engine, typically just to be worked in the case of engine combustion is good；In canister
There is carbon granule, it reclaims the oil vapour being evaporated in fuel tank, is sent in the case where engine operating condition is good
Burning is participated in combustion chamber, the benefit of canister has at 2 points：First：Reduction noxious gas emission, such as CH,
NOx, CO, CO2, SO2, H2S etc.；Second：Prevent fuel-steam excessive, oil circuit pressure it is excessive go out
Now suppress quick-fried possibility.
But, canister desorption system of the prior art can not be accurately controlled the flow of gasoline vapor,
Therefore cannot realize carrying out precise control to the air-fuel ratio of engine.Therefore, canister desorption system how is made
The flow of precise control gasoline vapor, is those skilled in the art's technical issues that need to address.
The content of the invention
It is an object of the invention to provide a kind of control method of canister desorption system, the method can be controlled accurately
The flow of gasoline vapor processed, realizes carrying out precise control to the air-fuel ratio of engine, improves canister desorption
The operating efficiency of system；The present invention also provides a kind of control device and Valve EGR of canister desorption system.
In order to solve the above technical problems, the present invention provides a kind of control method of canister desorption system, including：
Obtain the air-fuel ratio numerical value of waste gas in the blast pipe that lambda sensor detection is obtained；
It is determined that the duty cycle signals corresponding with the air-fuel ratio numerical value；
According to the duty cycle signals, the height that the diaphragm in control Valve EGR is opened.
Wherein, it is described to determine that the duty cycle signals corresponding with the air-fuel ratio numerical value include：
According to the air-fuel ratio numerical value, by way of mapping, determine in data list and the air-fuel
The duty cycle signals more corresponding than numerical value；Wherein, the air-fuel ratio numerical value is with the duty cycle signals one by one
Correspondence.
Wherein, the control method of the canister desorption system also includes：
The temperature of the coil in detection Valve EGR；
When the temperature of the coil exceedes threshold value, fault alarm is carried out.
Wherein, the control method of the canister desorption system also includes：
Whether detect the height that the diaphragm the is opened diaphragm Lift corresponding with the air-fuel ratio numerical value
Unanimously；
When inconsistent, fault cues are carried out.
The present invention also provides a kind of control device of canister desorption system, including：
Acquisition module, the air-fuel ratio numerical value for obtaining waste gas in the blast pipe that lambda sensor detection is obtained；
Determining module, for determining the duty cycle signals corresponding with the air-fuel ratio numerical value；
Control module, for according to the duty cycle signals, controlling what the diaphragm in Valve EGR was opened
Highly.
Wherein, the determining module is specifically for according to the air-fuel ratio numerical value, by way of mapping,
The duty cycle signals corresponding with the air-fuel ratio numerical value are determined in data list；Wherein, the air-fuel
Corresponded with the duty cycle signals than numerical value.
Wherein, the control device of canister desorption system also includes：
First detection module, the temperature for detecting the coil in Valve EGR；
First alarm module, for when the temperature of the coil exceedes threshold value, carrying out fault alarm.
Wherein, the control device of canister desorption system also includes：
Second detection module, it is corresponding with the air-fuel ratio numerical value for detecting the height that the diaphragm is opened
Diaphragm Lift it is whether consistent；
Second alarm module, the height for being opened when the diaphragm is corresponding with the air-fuel ratio numerical value
When diaphragm Lift is inconsistent, fault cues are carried out.
The present invention also provides a kind of Valve EGR, including：Coil, is arranged at the magnetic of the coil inside
Core, the diaphragm being connected with the magnetic core；
Wherein, the coil produces corresponding magnetic field intensity according to duty cycle signals；The magnetic core root
Corresponding displacement is produced in its operative orientation according to the size of the magnetic field intensity, the diaphragm is according to institute's rheme
Remove and open corresponding height.
Wherein, the magnetic core is cylinder shape magnetic core.
The control method of canister desorption system provided by the present invention, including：Lambda sensor is obtained to detect
To blast pipe in waste gas air-fuel ratio numerical value；It is determined that the dutycycle letter corresponding with the air-fuel ratio numerical value
Number；According to the duty cycle signals, the height that the diaphragm in control Valve EGR is opened.
The air-fuel ratio numerical value that the method passes through acquisition in real time, it is possible to according to air-fuel ratio numerical value and current amplitude
Corresponding relation, the corresponding duty cycle signals of air-fuel ratio numerical value are determined in real time；Again due to duty cycle signals
Difference, the size according to duty cycle signals can control the height that the diaphragm in Valve EGR opens
Just.The amount of the gasoline vapor into cylinder is controlled by the difference of the height of diaphragm unlatching.From
And realize the flow of precise control gasoline vapor.
The method is capable of the flow of precise control gasoline vapor, realizes carrying out accurately the air-fuel ratio of engine
Control, improves the operating efficiency of canister desorption system.
The invention also discloses a kind of control device and Valve EGR of canister desorption system.
Due to the flow of the change control gasoline vapor that the diaphragm in the Valve EGR passes through Lift,
Therefore, be not in frequently to be opened and closed situation, so as to alleviate the abrasion feelings of Valve EGR internal structure
Condition.Improve the operating efficiency of Valve EGR.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to reality
The accompanying drawing to be used needed for example or description of the prior art is applied to be briefly described, it should be apparent that, below
Accompanying drawing in description is only embodiments of the invention, for those of ordinary skill in the art, not
On the premise of paying creative work, other accompanying drawings can also be obtained according to the accompanying drawing for providing.
Fig. 1 is the flow chart of the control method of canister desorption system provided in an embodiment of the present invention；
Fig. 2 is the structured flowchart of the control device of canister desorption system provided in an embodiment of the present invention；
Fig. 3 is the structural representation of Valve EGR provided in an embodiment of the present invention.
Specific embodiment
Core of the invention is to provide a kind of control method of canister desorption system, and the method can be controlled accurately
The flow of gasoline vapor processed, realizes carrying out precise control to the air-fuel ratio of engine, improves canister desorption
The operating efficiency of system；The present invention also provides a kind of control device and Valve EGR of canister desorption system.
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with this hair
Accompanying drawing in bright embodiment, is clearly and completely described to the technical scheme in the embodiment of the present invention,
Obviously, described embodiment is a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained under the premise of creative work is not made
The every other embodiment for obtaining, belongs to the scope of protection of the invention.
Fig. 1 is refer to, Fig. 1 is the flow of the control method of canister desorption system provided in an embodiment of the present invention
Figure；The method can include：
Step s100, the air-fuel ratio numerical value for obtaining waste gas in the blast pipe that lambda sensor detection is obtained；
Wherein, the accurate air-fuel ratio numerical value that obtains is the height for accurately controlling the diaphragm in Valve EGR to open
Basis, also by detection-control-detection cause the control method turn into closed loop control method.The present invention is logical
Cross the air-fuel ratio numerical value for carrying out waste gas in accurate detection blast pipe using lambda sensor.
Step s101, the determination duty cycle signals corresponding with the air-fuel ratio numerical value；
Wherein, in order to realize to the precise control of air-fuel ratio, it is necessary to be adjusted according to air-fuel ratio numerical value in real time
Into the amount of the gasoline vapor of cylinder.Therefore, and duty cycle signals can control the Lift of diaphragm i.e.
The amount into the gasoline vapor of cylinder can be controlled.So changing the height that diaphragm is opened according to air-fuel ratio numerical value
Degree is that air-fuel ratio numerical value has a corresponding relation with the height that diaphragm is opened, thus air-fuel ratio numerical value with account for
Sky also has a corresponding relation than signal accordingly.
Wherein, corresponding relation here can be correspond i.e. one air-fuel ratio numerical value it is corresponding have one
Individual duty cycle signals；Can also be an interval air-fuel ratio numerical value it is corresponding have a duty cycle signals,
Certain interval span very little here.
So, can be accounted for it is determined that corresponding with the air-fuel ratio numerical value by corresponding relation between them
Sky compares signal.
Wherein, the duty cycle signals can be to the control of current signal, or to voltage signal
Control.
Step s102, the height opened according to the duty cycle signals, the diaphragm in control Valve EGR.
Wherein, because the Lift of duty cycle signals and diaphragm also has corresponding relation, therefore, pass through
Duty cycle signals, the height that the diaphragm in control Valve EGR is opened.
Wherein, after the engine started, duty cycle signals are configured according to the value of pre-defined rule.
Specifically, the course of work of canister desorption system is：To Valve EGR input duty cycle signal,
The diaphragm of Valve EGR opens corresponding height, and the oil gas in canister is incorporated into combustion chamber participates in engine
Burning.Waste gas by gas exhaust piping discharge, by lambda sensor detection gas exhaust piping in exhaust air-fuel ratio it is big
Small, lambda sensor is fed back this signal, duty cycle signals is controlled, so as to form closed-loop control system.
Based on above-mentioned technical proposal, the control method of canister desorption system provided in an embodiment of the present invention should
The air-fuel ratio numerical value that method passes through acquisition in real time, it is possible to corresponding with current amplitude according to air-fuel ratio numerical value
Relation, determines the corresponding duty cycle signals of air-fuel ratio numerical value in real time；Again due to the difference of duty cycle signals,
Size according to duty cycle signals can control the height of the height that the diaphragm in Valve EGR opens.It is logical
The difference of the height that diaphragm is opened is crossed to control the amount of the gasoline vapor into cylinder.It is achieved thereby that
The flow of precise control gasoline vapor is come the stream of precise control gasoline vapor by continuous control mode
Amount, realizes carrying out precise control to the air-fuel ratio of engine, improves the operating efficiency of canister desorption system.
Overcome and control oil by opening the control method of time length in signal period interior diaphragm in the prior art
Gas steam flow, this control mode is less efficient for continuous control method.Valve EGR
In closing course is opened, have a certain amount of oil gas and flow through magnetic valve, cause gasoline vapor flow to control
It is inaccurate.
Preferably, it is described to determine that the duty cycle signals corresponding with the air-fuel ratio numerical value include：
According to the air-fuel ratio numerical value, by way of mapping, determine in data list and the air-fuel
The duty cycle signals more corresponding than numerical value；Wherein, the air-fuel ratio numerical value is with the duty cycle signals one by one
Correspondence.
Wherein, air-fuel ratio numerical value is corresponded with the duty cycle signals, can accurately realize continuous control
System.So as to realize that the air-fuel ratio to engine carries out precise control, the work of canister desorption system is improve
Efficiency.
Preferably, above-mentioned control method can also include：
The temperature of the coil in detection Valve EGR；
When the temperature of the coil exceedes threshold value, fault alarm is carried out.
Due to coil after powered up, it is operated according to duty cycle signals, when breaking down, coil
Temperature may be raised, and cause coil to damage, or even vehicle breaks down, therefore, by coil
Temperature detected, can in time remind user's coil fault.Prevent from causing damage lives and properties.
Preferably, above-mentioned control method also includes：
Whether detect the height that the diaphragm the is opened diaphragm Lift corresponding with the air-fuel ratio numerical value
Unanimously；
When inconsistent, fault cues are carried out.
Due to the pin-point accuracy for only having diaphragm to open, continuous control can be accurately realized.So as to realize
Air-fuel ratio to engine carries out precise control, improves the operating efficiency of canister desorption system.Therefore,
Ensure the operating accuracy and efficiency of system, it is necessary to which the Lift to diaphragm is checked, so just may be used
To reach desired effects.Failure for occurring can in time be known and it is repaired.
Based on above-mentioned technical proposal, the control method of canister desorption system provided in an embodiment of the present invention is led to
The difference of the height that diaphragm is opened is crossed to control the amount of the gasoline vapor into cylinder.It is achieved thereby that
The flow of precise control gasoline vapor is come the stream of precise control gasoline vapor by continuous control mode
Amount, realizes carrying out precise control to the air-fuel ratio of engine, improves the operating efficiency of canister desorption system.
Also improve the safe coefficient and order of accuarcy of system.
The control method of canister desorption system is the embodiment of the invention provides, can by the above method
Realize carrying out precise control to the air-fuel ratio of engine, improve the operating efficiency of canister desorption system.
The control device to canister desorption system provided in an embodiment of the present invention is introduced below, hereafter retouches
The control device of the canister desorption system stated can be mutual with the control method of above-described canister desorption system
To should refer to.
Fig. 2 is refer to, Fig. 2 is the structure of the control device of canister desorption system provided in an embodiment of the present invention
Block diagram；The device can include：
Acquisition module 100, the air-fuel ratio number for obtaining waste gas in the blast pipe that lambda sensor detection is obtained
Value；
Determining module 200, for determining the duty cycle signals corresponding with the air-fuel ratio numerical value；
Control module 300, for according to the duty cycle signals, the diaphragm in control Valve EGR to be opened
Height.
Preferably, the determining module is specifically for according to the air-fuel ratio numerical value, by way of mapping,
The duty cycle signals corresponding with the air-fuel ratio numerical value are determined in data list；Wherein, the air-fuel
Corresponded with the duty cycle signals than numerical value.
Preferably, above-mentioned control device also includes：
First detection module, the temperature for detecting the coil in Valve EGR；
First alarm module, for when the temperature of the coil exceedes threshold value, carrying out fault alarm.
Preferably, above-mentioned control device also includes：
Second detection module, it is corresponding with the air-fuel ratio numerical value for detecting the height that the diaphragm is opened
Diaphragm Lift it is whether consistent；
Second alarm module, the height for being opened when the diaphragm is corresponding with the air-fuel ratio numerical value
When diaphragm Lift is inconsistent, fault cues are carried out.
Fig. 3 is refer to, Fig. 3 is the structural representation of Valve EGR provided in an embodiment of the present invention；The carbon
Tank magnetic valve can include：Coil 400, is arranged at the magnetic core 500 of the coil inside, with the magnetic core
Connected diaphragm 600；
Wherein, the coil 400 produces corresponding magnetic field intensity according to duty cycle signals；The magnetic
Core 500 produces corresponding displacement, the diaphragm 600 according to the size of the magnetic field intensity in its operative orientation
Corresponding height is opened according to the displacement.
Wherein, Valve EGR also includes：Lower protection cap, magnetic shell, skeleton, terminal, rubber seal,
Upper protection cap；
Wherein, magnetic core 500 can directly be fixedly connected with diaphragm 600, it is also possible to by miscellaneous part phase
Even, as long as the displacement with the displacement of magnetic core 500 of diaphragm 600 can be realized.
Wherein, here magnetic core 500 and coil 400 are simultaneously not attached to, therefore, it is passed through not to coil 400
Same duty cycle signals, coil 400 produces different size of magnetic field intensity, boosts the magnetic core 500 of hub of a spool
Move up and down, so as to realize the continuous control of flow.
Wherein, it is preferred that magnetic core 500 can be magnetic permanent magnetism core.
Optionally, the magnetic core 500 is cylinder shape magnetic core.
Based on above-mentioned technical proposal, Valve EGR provided in an embodiment of the present invention, by canister electromagnetism
Valve input duty cycle signal so that the diaphragm in Valve EGR is realized continuously opening function.Therefore, carbon
The diaphragm of tank magnetic valve opens efficiency and is lifted, and is reduced for internal structure wear extent, even more realizes
For the continuous control of flow.
Each embodiment is described by the way of progressive in specification, and what each embodiment was stressed is
With the difference of other embodiment, between each embodiment identical similar portion mutually referring to.It is right
For device disclosed in embodiment, because it is corresponded to the method disclosed in Example, so description
Fairly simple, related part is referring to method part illustration.
Professional further appreciates that, respectively shows with reference to what the embodiments described herein was described
The unit and algorithm steps of example, can be realized with electronic hardware, computer software or the combination of the two,
It is general according to function in the above description in order to clearly demonstrate the interchangeability of hardware and software
Describe the composition and step of each example.These functions are performed with hardware or software mode actually,
Depending on the application-specific and design constraint of technical scheme.Professional and technical personnel can be specific to each
Application described function is realized using distinct methods, but this realize it is not considered that beyond this
The scope of invention.
The method that is described with reference to the embodiments described herein or can directly use the step of algorithm hardware,
The software module of computing device, or the two combination is implemented.Software module can be placed in deposits at random
Reservoir (RAM), internal memory, read-only storage (ROM), electrically programmable ROM, electric erasable can be compiled
It is known in journey ROM, register, hard disk, moveable magnetic disc, CD-ROM or technical field to appoint
In the storage medium of other forms of anticipating.
Control method above to canister desorption system provided by the present invention, control device and canister electromagnetism
Valve is described in detail.Specific case used herein is carried out to principle of the invention and implementation method
Illustrate, the explanation of above example is only intended to help and understands the method for the present invention and its core concept.
It should be pointed out that for those skilled in the art, before the principle of the invention is not departed from
Put, some improvement and modification can also be carried out to the present invention, these are improved and modification also falls into the present invention
In scope of the claims.
Claims (10)
1. a kind of control method of canister desorption system, it is characterised in that including：
Obtain the air-fuel ratio numerical value of waste gas in the blast pipe that lambda sensor detection is obtained；
It is determined that the duty cycle signals corresponding with the air-fuel ratio numerical value；
According to the duty cycle signals, the height that the diaphragm in control Valve EGR is opened.
2. control method as claimed in claim 1, it is characterised in that the determination and the air-fuel ratio
The corresponding duty cycle signals of numerical value include：
According to the air-fuel ratio numerical value, by way of mapping, determine in data list and the air-fuel
The duty cycle signals more corresponding than numerical value；Wherein, the air-fuel ratio numerical value is with the duty cycle signals one by one
Correspondence.
3. control method as claimed in claim 1, it is characterised in that also include：
The temperature of the coil in detection Valve EGR；
When the temperature of the coil exceedes threshold value, fault alarm is carried out.
4. control method as claimed in claim 1, it is characterised in that also include：
Whether detect the height that the diaphragm the is opened diaphragm Lift corresponding with the air-fuel ratio numerical value
Unanimously；
When inconsistent, fault cues are carried out.
5. a kind of control device of canister desorption system, it is characterised in that including：
Acquisition module, the air-fuel ratio numerical value for obtaining waste gas in the blast pipe that lambda sensor detection is obtained；
Determining module, for determining the duty cycle signals corresponding with the air-fuel ratio numerical value；
Control module, for according to the duty cycle signals, controlling what the diaphragm in Valve EGR was opened
Highly.
6. control device as claimed in claim 5, it is characterised in that the determining module specifically for
According to the air-fuel ratio numerical value, by way of mapping, determine in data list and the air-fuel ratio number
The corresponding duty cycle signals of value；Wherein, the air-fuel ratio numerical value is corresponded with the duty cycle signals.
7. control device as claimed in claim 5, it is characterised in that also include：
First detection module, the temperature for detecting the coil in Valve EGR；
First alarm module, for when the temperature of the coil exceedes threshold value, carrying out fault alarm.
8. control device as claimed in claim 5, it is characterised in that also include：
Second detection module, it is corresponding with the air-fuel ratio numerical value for detecting the height that the diaphragm is opened
Diaphragm Lift it is whether consistent；
Second alarm module, the height for being opened when the diaphragm is corresponding with the air-fuel ratio numerical value
When diaphragm Lift is inconsistent, fault cues are carried out.
9. a kind of Valve EGR, it is characterised in that including：Coil, is arranged at the coil inside
Magnetic core, the diaphragm being connected with the magnetic core；
Wherein, the coil produces corresponding magnetic field intensity according to duty cycle signals；The magnetic core root
Corresponding displacement is produced in its operative orientation according to the size of the magnetic field intensity, the diaphragm is according to institute's rheme
Remove and open corresponding height.
10. Valve EGR as claimed in claim 9, it is characterised in that the magnetic core is cylinder
Magnetic core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510556438.2A CN106704041A (en) | 2015-09-02 | 2015-09-02 | Control method and device for carbon tank desorption system and carbon tank electromagnetic valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510556438.2A CN106704041A (en) | 2015-09-02 | 2015-09-02 | Control method and device for carbon tank desorption system and carbon tank electromagnetic valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106704041A true CN106704041A (en) | 2017-05-24 |
Family
ID=58929430
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510556438.2A Pending CN106704041A (en) | 2015-09-02 | 2015-09-02 | Control method and device for carbon tank desorption system and carbon tank electromagnetic valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106704041A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109269588A (en) * | 2018-10-17 | 2019-01-25 | 奇瑞汽车股份有限公司 | Cubing equipment and measurement method is desorbed in canister |
| CN111058975A (en) * | 2019-11-29 | 2020-04-24 | 安徽江淮汽车集团股份有限公司 | Method and system for controlling desorption of carbon tank of engine and computer readable storage medium |
| CN112177784A (en) * | 2020-09-30 | 2021-01-05 | 东风汽车集团有限公司 | Opening control method for carbon tank electromagnetic valve |
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| CN109269588A (en) * | 2018-10-17 | 2019-01-25 | 奇瑞汽车股份有限公司 | Cubing equipment and measurement method is desorbed in canister |
| CN111058975A (en) * | 2019-11-29 | 2020-04-24 | 安徽江淮汽车集团股份有限公司 | Method and system for controlling desorption of carbon tank of engine and computer readable storage medium |
| CN111058975B (en) * | 2019-11-29 | 2021-01-26 | 安徽江淮汽车集团股份有限公司 | Method and system for controlling desorption of carbon tank of engine and computer readable storage medium |
| CN112177784A (en) * | 2020-09-30 | 2021-01-05 | 东风汽车集团有限公司 | Opening control method for carbon tank electromagnetic valve |
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Effective date of registration: 20180418 Address after: No. 188, Miyun District, Miyun District, Beijing, Beijing Applicant after: Beijing treasure Car Co., Ltd. Address before: 102206 Changping District City, Shahe, Sha Yang Road, Beijing Applicant before: Beiqi Futian Automobile Co., Ltd. |
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Application publication date: 20170524 |