CN110793785A - Test device for calibrating desorption control strategy of automobile activated carbon canister - Google Patents
Test device for calibrating desorption control strategy of automobile activated carbon canister Download PDFInfo
- Publication number
- CN110793785A CN110793785A CN201911150921.5A CN201911150921A CN110793785A CN 110793785 A CN110793785 A CN 110793785A CN 201911150921 A CN201911150921 A CN 201911150921A CN 110793785 A CN110793785 A CN 110793785A
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- CN
- China
- Prior art keywords
- activated carbon
- desorption
- pressure
- carbon canister
- control strategy
- 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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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 123
- 238000003795 desorption Methods 0.000 title claims abstract description 44
- 238000012360 testing method Methods 0.000 title claims abstract description 31
- 238000011217 control strategy Methods 0.000 title claims abstract description 28
- 239000004215 Carbon black (E152) Substances 0.000 claims abstract description 25
- 229930195733 hydrocarbon Natural products 0.000 claims abstract description 25
- 150000002430 hydrocarbons Chemical class 0.000 claims abstract description 25
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 23
- 229910052799 carbon Inorganic materials 0.000 claims description 11
- 239000007789 gas Substances 0.000 abstract description 14
- 239000003344 environmental pollutant Substances 0.000 abstract description 11
- 231100000719 pollutant Toxicity 0.000 abstract description 11
- 238000000034 method Methods 0.000 abstract description 6
- 238000013461 design Methods 0.000 abstract description 3
- 238000011161 development Methods 0.000 abstract description 3
- 238000000605 extraction Methods 0.000 abstract description 2
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 2
- 239000001257 hydrogen Substances 0.000 abstract description 2
- 239000002828 fuel tank Substances 0.000 description 7
- 238000001179 sorption measurement Methods 0.000 description 6
- 239000000446 fuel Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000003610 charcoal Substances 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Supplying Secondary Fuel Or The Like To Fuel, Air Or Fuel-Air Mixtures (AREA)
Abstract
The invention provides a test device for calibrating a desorption control strategy of an automobile activated carbon canister, which comprises a controller, an oil tank, the activated carbon canister and a hydrocarbon concentration detector, wherein the controller is connected with the oil tank; the air outlet of the oil tank is connected with the oil-gas inlet of the activated carbon tank, the desorption port of the activated carbon tank is connected with one end of the electromagnetic valve, the other end of the electromagnetic valve is connected with the inlet of the pressure stabilizing box, and the outlet of the pressure stabilizing box is connected with the extraction opening of the pressure-adjustable vacuum pump; the air inlet of the carbon-hydrogen concentration detector is connected with the atmosphere port of the activated carbon canister or the air outlet of the pressure-adjustable vacuum pump. The invention relates to a test device for calibrating a desorption control strategy of an automobile activated carbon canister, which is matched with a controller, an oil tank, the activated carbon canister, an electromagnetic valve, a hydrocarbon concentration detector, a pressure stabilizing box and an adjustable pressure vacuum pump; the method can realize rapid and independent completion of the calibration of the desorption control strategy of the activated carbon tank, does not need to carry out an oiling pollutant emission test of the whole vehicle, and shortens the design development and desorption calibration periods of the activated carbon tank.
Description
Technical Field
The invention belongs to the technical field of automobiles, and particularly relates to a test device for calibrating an automobile activated carbon canister desorption control strategy.
Background
A large amount of fuel vapor is discharged from a fuel filling port in the automobile refueling process, and the emission of hydrocarbon pollutants is formed. A VII type test (namely an oiling pollutant emission test) is specially and newly added in the national VI emission standard to control oiling pollutant emission, and the oiling emission of a single vehicle is regulated to be lower than 0.05g/test, so that the existing national V fuel system is difficult to meet the requirements. The control to refuel the emission is at present tending to increase on-vehicle refuel vapor recovery unit, its theory of operation is in, the car refuels the in-process, the fuel constantly flows into the fuel tank, the liquid level risees the gas in the continuous extrusion fuel tank, the inside gas pressure of fuel tank risees, simultaneously because the volatility of petrol self and the flow of petrol, the inside a large amount of petrol vapour that can produce of fuel tank, the petrol vapour that produces in the fuel tank passes through the fuel tank gas outlet and gets into the activated carbon jar, by the activated carbon adsorption in the activated carbon jar, prevent that petrol vapour from leaking in the middle of the atmosphere, reduce hydrocarbon pollutant's emission. When the vehicle runs, the desorption electromagnetic valve on the desorption pipeline connecting the carbon canister and the engine is opened according to a preset control strategy, air is sucked from the atmosphere port of the carbon canister under the action of the vacuum pressure of the air inlet manifold, gas flows through the carbon canister and takes away oil gas adsorbed by activated carbon, flows out of the carbon canister through the desorption port, enters the air inlet manifold of the engine and finally enters the engine cylinder to be burnt, so that the activated carbon canister is desorbed and blown, and the adsorption working capacity is recovered again.
Under the prior art, for calibrating the carbon canister desorption control strategy, the carbon canister and the electromagnetic valve need to be installed on the whole vehicle, and the engine is allowed to run really to complete carbon canister desorption. Because it can't directly learn whether the canister desorption is accomplished to and when to accomplish not have monitoring device, can only judge whether the desorption satisfies the requirement through the adsorption effect of refueling pollutant emission test inspection canister, there are calibration steps loaded down with trivial details, experimental cycle length and the high problem of test cost.
Disclosure of Invention
In view of the above, the invention aims to provide a test device for calibrating a desorption control strategy of an automobile activated carbon canister, which is matched with a controller, an oil tank, the activated carbon canister, an electromagnetic valve, a hydrocarbon concentration detector, a pressure stabilizing box and an adjustable pressure vacuum pump; the method can realize rapid and independent completion of the calibration of the desorption control strategy of the activated carbon tank, does not need to carry out an oiling pollutant emission test of the whole vehicle, and shortens the design development and desorption calibration periods of the activated carbon tank.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a test device for calibrating a desorption control strategy of an automobile activated carbon canister comprises a controller, an oil tank, the activated carbon canister and a hydrocarbon concentration detector; the air outlet of the oil tank is connected with the oil-gas inlet of the activated carbon tank, the desorption port of the activated carbon tank is connected with one end of the electromagnetic valve, the other end of the electromagnetic valve is connected with the inlet of the pressure stabilizing box, and the outlet of the pressure stabilizing box is connected with the extraction opening of the pressure-adjustable vacuum pump; the air inlet of the carbon-hydrogen concentration detector is connected with an atmospheric port of the activated carbon canister or an air outlet of the pressure-adjustable vacuum pump; a pressure stabilizing box pressure sensor is arranged in the pressure stabilizing box; the control end of the electromagnetic valve, the control end of the pressure-adjustable vacuum pump, the signal end of the pressure stabilizing box pressure sensor and the signal end of the hydrocarbon concentration detector are all connected with the controller.
Further, the controller is respectively connected with an ambient temperature sensor and an ambient pressure sensor.
In this embodiment, the controller may be a central controller or a PLC controller.
Furthermore, an oil filling pipe is arranged on the oil tank.
Compared with the prior art, the test device for calibrating the desorption control strategy of the automobile activated carbon canister has the following advantages:
the invention relates to a test device for calibrating a desorption control strategy of an automobile activated carbon canister, which is matched with a controller, an oil tank, the activated carbon canister, an electromagnetic valve, a hydrocarbon concentration detector, a pressure stabilizing box and an adjustable pressure vacuum pump, can realize the rapid and independent calibration of the desorption control strategy of the activated carbon canister, does not need to carry out an oiling pollutant emission test of the whole automobile, and shortens the design development of the activated carbon canister and the period of desorption calibration.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention.
In the drawings:
FIG. 1 is a schematic diagram of a canister pre-processing state of a testing apparatus for calibrating a desorption control strategy of an automotive activated canister according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a desorption calibration state of a canister of a testing apparatus for calibrating a desorption control strategy of an automotive activated canister according to an embodiment of the present invention;
fig. 3 is a schematic view of a use flow of a test device for calibrating a desorption control strategy of an automobile activated carbon canister according to an embodiment of the present invention.
Description of reference numerals:
1-a controller; 2-ambient temperature sensor; 3-an ambient pressure sensor; 4-air outlet; 5-oil filling pipe; 6-an oil tank; 7-oil gas inlet; 8-activated carbon canister; 9-atmosphere port; 10-a desorption port; 11-a solenoid valve; 12-a surge tank; 13-an adjustable pressure vacuum pump; 14-a hydrocarbon concentration detector; 15-pressure stabilizing box pressure sensor.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1-2, a test device for calibrating a desorption control strategy of an automobile activated carbon canister comprises a controller 1, an oil tank 6, an activated carbon canister 8 and a hydrocarbon concentration detector 14; an air outlet 4 of the oil tank 6 is connected with an oil gas inlet 7 of an activated carbon tank 8, a desorption port 10 of the activated carbon tank 8 is connected with one end of an electromagnetic valve 11, the other end of the electromagnetic valve 11 is connected with an inlet of a pressure stabilizing box 12, and an outlet of the pressure stabilizing box 12 is connected with an air suction port of an adjustable pressure vacuum pump 13; an air inlet of the hydrocarbon concentration detector 14 is connected with an atmosphere port 9 of the activated carbon canister 8 or an air outlet of the pressure-adjustable vacuum pump 13; a pressure stabilizing box pressure sensor 15 is arranged in the pressure stabilizing box 12; the control end of the electromagnetic valve 11, the control end of the adjustable pressure vacuum pump 13, the signal end of the pressure stabilizing box pressure sensor 15 and the signal end of the hydrocarbon concentration detector 14 are all connected with the controller 1.
Further, the controller 1 is connected to an ambient temperature sensor 2 and an ambient pressure sensor 3, respectively.
In this embodiment, the controller 1 may be a central controller or a PLC controller.
As shown in fig. 1-2, a filler pipe 5 is provided on the oil tank 6.
In this embodiment, the process for calibrating the desorption control strategy of the activated carbon canister of the vehicle is as follows:
as shown in fig. 3, if the activated carbon canister 8 is not used, canister pretreatment is performed first, including canister complete adsorption and canister complete desorption:
and (3) complete adsorption of the carbon canister: the test device is connected as shown in fig. 1, at this time, the adjustable pressure vacuum pump 13 does not work, the electromagnetic valve 11 is closed, and the atmosphere port 9 of the activated carbon canister 8 is connected with the hydrocarbon concentration detector 14; firstly, carrying out the complete adsorption operation of the carbon canister: and continuously filling oil into the oil tank 6 at the oil filling temperature of 20 +/-1 ℃ and the oil filling speed of 37 +/-1L/min until the hydrocarbon concentration detector 14 detects that the hydrocarbon gas is discharged from the atmosphere port 9 of the activated carbon tank 8, and emptying the oil tank 6 after the activated carbon tank 8 is considered to be completely adsorbed.
And then continuing to perform complete desorption of the carbon canister: the test device is connected as shown in fig. 2, the hydrocarbon concentration detector 14 is connected with the air outlet of the adjustable pressure vacuum pump 13, the controller 1 is used for controlling the vacuum pressure of the adjustable pressure vacuum pump 13 to be 5kPa, the electromagnetic valve 11 is normally opened, and desorption operation is carried out until the hydrocarbon concentration detector 14 does not detect hydrocarbon gas.
After completing the charcoal jar preliminary treatment, begin activated carbon jar desorption control strategy and mark, if the charcoal jar used, then need not the preliminary treatment, can directly begin to mark:
step one, the oil tank 6 is filled with oil: the connection state of the test apparatus shown in fig. 2 is adopted to perform refueling operation of the fuel tank 6 according to the refueling requirements of the refueling pollutant emission test (VII test) in the limit of light automobile pollutant emission and the measurement method (sixth stage of china). Wherein the oiling temperature is 20 ℃ plus or minus 1 ℃, the oiling speed is 37L/min plus or minus 1L/min, the oiling amount is 85 percent plus or minus 0.5L, the volume of the oil tank is nominal, the adjustable pressure vacuum pump 13 does not work in the oiling operation, and the electromagnetic valve 11 is closed.
Secondly, inputting calibration control parameters: the general knowledge in the prior art: in the running process of the automobile according to the refueling pollutant emission test (VII type test), the vacuum pressure change curve data of the engine intake manifold is input into the controller 1, the adjustable pressure vacuum pump 13 is controlled to be started by taking the data as a standard, and the vacuum pressure in the pressure stabilizing box 12 is matched with the input vacuum pressure change curve of the engine intake manifold by the pressure stabilizing box pressure sensor 15.
Inputting the control strategy of the activated carbon canister 8 into the controller 1, controlling the opening and closing of the electromagnetic valve 11 by taking the control strategy as a standard, calibrating the activated carbon canister 8, detecting the hydrocarbon concentration in the gas discharged by the adjustable pressure vacuum pump 13 through the hydrocarbon concentration detector 14, and judging whether the desorption of the activated carbon canister 8 is finished. And if the desorption of the activated carbon canister 8 is not finished, modifying the control strategy of the activated carbon canister 8 in the controller 1, returning to the first step of oil tank 6 for refueling, and starting the circulation again until the desorbed gas detected by the hydrocarbon concentration detector 14 does not contain hydrocarbon gas, and finally finishing the calibration of the desorption control strategy of the activated carbon canister.
In the above technical solutions, the data of the vacuum pressure variation curve of the intake manifold of the engine belongs to the common knowledge in the field, and it also belongs to the common technical means in the field that the pressure variation curve and the canister desorption control strategy are stored in the controller 1.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. The utility model provides a test device that is used for car active carbon jar desorption control strategy to markd which characterized in that: comprises a controller (1), an oil tank (6), an activated carbon canister (8) and a hydrocarbon concentration detector (14); an air outlet (4) of the oil tank (6) is connected with an oil-gas inlet (7) of the activated carbon tank (8), a desorption port (10) of the activated carbon tank (8) is connected with one end of an electromagnetic valve (11), the other end of the electromagnetic valve (11) is connected with an inlet of a pressure stabilizing box (12), and an outlet of the pressure stabilizing box (12) is connected with an air suction port of an adjustable pressure vacuum pump (13); the air inlet of the hydrocarbon concentration detector (14) is connected with the atmospheric port (9) of the activated carbon canister (8) or the air outlet of the adjustable pressure vacuum pump (13); a pressure stabilizing box pressure sensor (15) is arranged in the pressure stabilizing box (12); the control end of the electromagnetic valve (11), the control end of the adjustable pressure vacuum pump (13), the signal end of the pressure stabilizing box pressure sensor (15) and the signal end of the hydrocarbon concentration detector (14) are all connected with the controller (1).
2. The test device for calibrating the desorption control strategy of the activated carbon canister of the automobile as claimed in claim 1, wherein: the controller (1) is respectively connected with the ambient temperature sensor (2) and the ambient pressure sensor (3).
3. The test device for calibrating the desorption control strategy of the activated carbon canister of the automobile as claimed in claim 1, wherein: an oil filling pipe (5) is arranged on the oil tank (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911150921.5A CN110793785A (en) | 2019-11-21 | 2019-11-21 | Test device for calibrating desorption control strategy of automobile activated carbon canister |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911150921.5A CN110793785A (en) | 2019-11-21 | 2019-11-21 | Test device for calibrating desorption control strategy of automobile activated carbon canister |
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| Publication Number | Publication Date |
|---|---|
| CN110793785A true CN110793785A (en) | 2020-02-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911150921.5A Pending CN110793785A (en) | 2019-11-21 | 2019-11-21 | Test device for calibrating desorption control strategy of automobile activated carbon canister |
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| CN (1) | CN110793785A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114199754A (en) * | 2021-11-17 | 2022-03-18 | 柳州舜泽尔汽车零部件有限公司 | Method for detecting cleanliness of national six-carbon canister of automobile |
| CN115045779A (en) * | 2022-07-15 | 2022-09-13 | 江铃汽车股份有限公司 | Experimental method and system for detecting hydrocarbon evaporation emission in refueling process |
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| CN210638901U (en) * | 2019-11-21 | 2020-05-29 | 中国汽车技术研究中心有限公司 | Test device for calibrating desorption control strategy of automobile activated carbon canister |
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2019
- 2019-11-21 CN CN201911150921.5A patent/CN110793785A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114199754A (en) * | 2021-11-17 | 2022-03-18 | 柳州舜泽尔汽车零部件有限公司 | Method for detecting cleanliness of national six-carbon canister of automobile |
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| CN115045779B (en) * | 2022-07-15 | 2023-11-14 | 江铃汽车股份有限公司 | Experimental method and system for detecting hydrocarbon evaporation emission in oiling process |
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Effective date of registration: 20230327 Address after: 300300 68 pioneer East Road, Dongli District, Tianjin Applicant after: CHINA AUTOMOTIVE TECHNOLOGY AND RESEARCH CENTER Co.,Ltd. Applicant after: CATARC AUTOMOTIVE TEST CENTER (TIANJIN) Co.,Ltd. Address before: 300300 68 pioneer East Road, Dongli District, Tianjin Applicant before: CHINA AUTOMOTIVE TECHNOLOGY AND RESEARCH CENTER Co.,Ltd. Applicant before: CATARC (TIANJIN) AUTOMOTIVE ENGINEERING RESEARCH INSTITUTE Co.,Ltd. |