CN201272236Y - Carbon pot control device of automobile fuel evaporation discharge system - Google Patents
Carbon pot control device of automobile fuel evaporation discharge system Download PDFInfo
- Publication number
- CN201272236Y CN201272236Y CNU2008201279322U CN200820127932U CN201272236Y CN 201272236 Y CN201272236 Y CN 201272236Y CN U2008201279322 U CNU2008201279322 U CN U2008201279322U CN 200820127932 U CN200820127932 U CN 200820127932U CN 201272236 Y CN201272236 Y CN 201272236Y
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- Prior art keywords
- canister
- sensor
- carbon
- pipeline
- fuel
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- 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.)
- Expired - Lifetime
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 238000001704 evaporation Methods 0.000 title claims abstract description 25
- 230000008020 evaporation Effects 0.000 title claims abstract description 25
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 24
- 239000000446 fuel Substances 0.000 title abstract description 15
- 150000002430 hydrocarbons Chemical class 0.000 claims description 35
- 239000004215 Carbon black (E152) Substances 0.000 claims description 34
- 229930195733 hydrocarbon Natural products 0.000 claims description 34
- 239000003610 charcoal Substances 0.000 claims description 27
- 239000000295 fuel oil Substances 0.000 claims description 23
- 238000007599 discharging Methods 0.000 claims description 18
- 241001636373 Cannabis cryptic virus Species 0.000 claims description 10
- 239000003921 oil Substances 0.000 claims description 8
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 239000007789 gas Substances 0.000 abstract 3
- 229910052739 hydrogen Inorganic materials 0.000 abstract 1
- 239000001257 hydrogen Substances 0.000 abstract 1
- 238000005406 washing Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 19
- 238000000034 method Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 239000002828 fuel tank Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000008187 granular material Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000003795 desorption Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 239000010761 intermediate fuel oil Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000001745 non-dispersive infrared spectroscopy Methods 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000008186 active pharmaceutical agent Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000005616 pyroelectricity Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
Images
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- Supplying Secondary Fuel Or The Like To Fuel, Air Or Fuel-Air Mixtures (AREA)
Abstract
The utility model discloses a carbon canister control device in an automobile fuel evaporation emission system, belonging to the technical field of controlling evaporation and emission of fuel. The carbon canister control device comprises a carbon canister, a pipeline, a carbon canister control valve and a sensor. The carbon canister is filled with active carbon for washing out the oil gas absorbed on the active carbon; the pipeline bears the circulation of the oil gas; the carbon canister control valve controls the circulation of the oil gas; and the pipeline is connected with the carbon canister and the carbon canister control valve. With the technical proposal, carbon-hydrogen concentration can be obtained in real time, exactly and simply; consequently, the evaporation of the fuel can be controlled more accurately and conveniently.
Description
Technical field
The utility model relates to fuel oil evaporation emission control technique field, the charcoal jar control setup in particularly a kind of vehicle fuel oil evaporation discharging system.
Background technology
In recent years, along with improving constantly of people's environmental protection consciousness, aerial contamination has become the problem that society is paid close attention to.Vehicle fuel oil evaporation discharging system, control the fuel-steam pollution on the environment that produces by fuel tank in the automobile fuel-feed system exactly, the pollution of fuel-steam evaporation accounts for 20% of the hydrocarbon total discharging of automobile greatly, and present automobile has all been installed fuel oil evaporation discharging system.
In vehicle fuel oil evaporation discharging system,, absorb evaporant with carbon canister for the steam that prevents fuel tank directly is dispersed in the atmosphere, when engine operation, by canister vent valve, the oily vapour that is adsorbed in the carbon canister is carried, enter driving engine and burn.
As shown in Figure 1, be the fuel oil evaporation discharging system fundamental diagram, fuel oil evaporation discharging system mainly comprises parts compositions such as canister, CanCV Canister Control Valve, pipeline, and this system disposition has the carbon canister that is installed in fuel tank breather pipe end.Charcoal absorption fuel vapor in the carbon canister only allow air to be discharged in the atmosphere.In order to make carbon canister have power of regeneration, additional pipeline is housed between from the carbon canister to the air inlet pipe.During the driving engine operation, can produce vacuum in the air inlet pipe.When suitable operating mode is worked, charcoal jar desorption valve is opened, under the effect of engine air inlet tube degree of vacuum, fresh air enters the charcoal jar from the free vent of charcoal jar, the fuel oil that is adsorbed onto on the activated carbon granule is washed away, and be drawn onto in the cylinder with the form of oil gas and burn, thereby, avoid fuel-steam to flow to contaminated environment in the atmosphere, also played the effect of fuel-economizing simultaneously.
Fresh air and be adsorbed onto fuel oil on the activated carbon granule and mix that what form is gas mixture can not be known its composition in advance, therefore how to determine that hydrocarbon (CH) concentration becomes the difficult point of charcoal jar control technology.Existingly determine that hydrocarbon concentration method is: in air/fuel ratio (mass ratio of fuel and air) pre-control accurately under the situation, (aviation value of mixture control value is caused by the hydrocarbon composition in the charcoal jar flushing air-flow deviation of air/fuel ratio fully, there are mapping relations in both, so can obtain the information of hydrocarbon composition in the charcoal jar by the deviation of air/fuel ratio.Charcoal jar control setup divides two-way output: one tunnel output control canister vent valve, and control the dutycycle of canister vent valve in real time according to operating mode, thereby change the aperture of control cock; One tunnel output is the control fuel injector indirectly, and according to containing what of gasolene ingredient in the charcoal jar, and how many fuel charges the decision fuel injector should reduce, with the ratio that reaches suction quantity and fuel charge near or reach the requirement of chemical air/fuel ratio.
But this method has weak point: must just can obtain relevant information after deviation appears in gasoline air mixture ratio, what the charcoal jar washed away the hydrocarbon concentration of mixture gas determines to have " hysteresis " property, also is to regulate a kind of " afterwards " to the adjusting of fuel injector.The calculating of hydrocarbon mixture gas is comparatively complicated in addition, and relevant modifying factor is more, and the particularity of result of calculation is difficult to guarantee, brings certain difficulty for the staking-out work of mixture gas.Simultaneously, to take certain resource of ECU and time when calculating hydrocarbon concentration, its burden, real-time guarantees comparatively painstaking.
In a word, existingly determine hydrocarbon concentration method, can't be in real time, accurate and simply obtain hydrocarbon concentration parameter.
Summary of the invention
For real-time, accurately and simply obtain hydrocarbon concentration, the utility model provides the control setup of the charcoal jar in a kind of vehicle fuel oil evaporation discharging system.
Technical scheme in the utility model is as follows:
Charcoal jar control setup in a kind of vehicle fuel oil evaporation discharging system comprises:
Canister is equipped with active carbon, is used to wash away the oil gas that is adsorbed onto on the activated carbon granule;
Pipeline, the circulation that is used to carry oil gas;
CanCV Canister Control Valve is used to control the circulation of oil gas;
Pipeline connects described canister and described CanCV Canister Control Valve;
Also comprise sensor in this device.
Wherein, sensor specifically can be hydrocarbon sensor.
Sensor can be positioned at the pipeline in CanCV Canister Control Valve downstream.
Sensor also can be positioned at the pipeline of CanCV Canister Control Valve upstream.
The quantity of sensor can be one.
By the technical scheme in the utility model, can real-time, accurately and simply obtain hydrocarbon concentration, thus more accurate, control the evaporation of fuel oil easily.
Description of drawings
Fig. 1 is the scheme drawing of vehicle fuel oil evaporation discharging system of the prior art;
Fig. 2 is the scheme drawing of the vehicle fuel oil evaporation discharging system that provides of the utility model.
Description of reference numerals:
1-mixture gas; 2-electric signal; 3-fuel-steam; 4-fuel tank; 5-throttle valve body; 6-canister vent valve;
7-fresh air; 8-charcoal jar; 9-CH sensor.
The specific embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, the utility model embodiment is described in further detail below in conjunction with accompanying drawing.
The utility model provides the control setup of the charcoal jar in a kind of vehicle fuel oil evaporation discharging system.
As shown in Figure 2: be the scheme drawing of embodiment IFO intermediate fuel oil discharge vaporization of the present utility model system.Evaporative emission control system mainly comprises parts compositions such as canister, CanCV Canister Control Valve, hydrocarbon sensor, pipeline.In the technical solution of the utility model, on existing evaporative emission control system basis, wash away gas air inlet pipe junction at induction tract and charcoal jar and install and fix a hydrocarbon sensor.
This system disposition has the carbon canister that is installed in fuel tank breather pipe end.In order to make carbon canister have power of regeneration, additional pipeline is housed between from the carbon canister to the air inlet pipe.During the driving engine operation, can produce vacuum in the air inlet pipe.When suitable operating mode is worked, charcoal jar desorption valve is opened, under the effect of engine air inlet tube degree of vacuum, fresh air enters the charcoal jar from the free vent of charcoal jar, the fuel oil that is adsorbed onto on the activated carbon granule is washed away, gas mixture passes through pipeline then, pass through canister vent valve and hydrocarbon sensor respectively, according to hydrocarbon concentration in the gas mixture of determining, be drawn onto in the cylinder with the form of oil gas and burn, thereby, avoid fuel-steam to flow to contaminated environment in the atmosphere, also played the effect of fuel-economizing simultaneously.
Because gas mixture, need to determine hydrocarbon concentration in the gas mixture, adopt in the present embodiment and wash away gas air inlet pipe junction at induction tract and charcoal jar and install and fix a hydrocarbon sensor, by hydrocarbon concentration in the output voltage demarcation gas mixture of hydrocarbon sensor.
Determine that the concrete grammar of hydrocarbon concentration is as follows in the gas mixture:
Step 1: change and flow through carbon canister, keep the stable of flow simultaneously to the additional pipeline gas concentration between the air inlet pipe.
Step 2: from concentration value is 0 to 100% evenly to get several concentration point, and the output voltage of survey sensor under a certain concentration point is corresponding with output voltage with this concentration point, obtains one group of data.
Step 3: just can form one according to several DS Data Set of measuring is that input value, hydrocarbon concentration are the numerical table of the one dimension of output valve about voltage.In practice, need only output voltage values according to hydrocarbon sensor, utilize this table to adopt the method for one dimension interpolation can obtain hydrocarbon concentration value in the air-flow of the hydrocarbon sensor of flowing through.
According to the hydrocarbon concentration difference of the air-flow of the hydrocarbon sensor of flowing through, the main signal of hydrocarbon sensor output and the ratio of reference signal peak-to-peak value change thereupon, according to the difference of this ratio, utilize complicated formula can draw hydrocarbon concentration.But because the formula complexity, consuming time longer when CPU utilizes this formula to calculate hydrocarbon concentration, we utilize the method for tabling look-up, and have avoided complicated function calculation.This mode is short computing time, and the result is accurate.
When charcoal jar control fuel oil evaporation discharge method was born, because sensor technology is immature, relevant sensor was comparatively expensive, and this is subjected to the restriction of scientific and technological condition at that time.Along with the progress of development of science and technology, sensor technology, the cost of hydrocarbon sensor, precision all reach can large-scale application stage.
Hydrocarbon sensor employing is a kind of electrical modulation NDIR (NDIR) gas sensor in the present embodiment, is mainly used in the existence of monitoring objective gas.It has advantages such as standard transducer size, response fast, built-in temperature compensation probe unit, wide temperature range of operation, low-power consumption.Its principle of work is as follows: sensor contains a long-life tungsten filament infrared light supply, a light chamber that is used for gas diffusion, pyroelectricity infrared detector and an electroregulator that is used for the monitors internal temperature traverse of a two temperature compensation; Infrared light supply adopts fixed voltage, the power supply of fixed frequency (dutycycle is 50%) power supply; The bifocal pyroelectric infrared detector produces corresponding output signal: following object gas concentration for one increases and the main signal (Active Signal) of minimizing, these two signals of reference signal (Reference Signal) that are used for monitoring infrared light intensity are alternating signals synchronous with infrared light supply, in order to measure the peak-to-peak value of these two signals, must and amplify these two signal extractions; The ratio of main signal (ActiveSignal) and reference signal (Reference Signal) peak-to-peak value is independent of infrared intensity variations, and ratio will reduce when object gas occurs; And the minimizing of ratio just can be used for determining the concentration of object gas; The minimizing of ratio is non-linear, and the concentration of gas can obtain by following formula:
[target?gas?concentration]＝(-(ln(1.(1.Ratio/zero)/span))/a)^(1/b)。
The above only is preferred embodiment of the present utility model, and is in order to restriction the utility model, not all within spirit of the present utility model and principle, any modification of being done, is equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (5)
1. the charcoal jar control setup in the vehicle fuel oil evaporation discharging system comprises:
Canister is equipped with active carbon, is used to wash away the oil gas that is adsorbed onto on the described active carbon;
Pipeline, the circulation that is used to carry described oil gas;
CanCV Canister Control Valve is used to control the circulation of described oil gas;
Described pipeline connects described canister and described CanCV Canister Control Valve;
It is characterized in that, also comprise sensor in the described device.
2, the charcoal jar control setup in the vehicle fuel oil evaporation discharging system according to claim 1 is characterized in that described sensor is specially hydrocarbon sensor.
According to the charcoal jar control setup in each described vehicle fuel oil evaporation discharging system in claim 1 or 2, it is characterized in that 3, described sensor is arranged in the described pipeline in described CanCV Canister Control Valve downstream.
According to the charcoal jar control setup in each described vehicle fuel oil evaporation discharging system in claim 1 or 2, it is characterized in that 4, described sensor is arranged in the described pipeline of described CanCV Canister Control Valve upstream.
According to the charcoal jar control setup in each described vehicle fuel oil evaporation discharging system among the claim 1-4, it is characterized in that 5, the quantity of described sensor is one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201279322U CN201272236Y (en) | 2008-07-15 | 2008-07-15 | Carbon pot control device of automobile fuel evaporation discharge system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201279322U CN201272236Y (en) | 2008-07-15 | 2008-07-15 | Carbon pot control device of automobile fuel evaporation discharge system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201272236Y true CN201272236Y (en) | 2009-07-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201279322U Expired - Lifetime CN201272236Y (en) | 2008-07-15 | 2008-07-15 | Carbon pot control device of automobile fuel evaporation discharge system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201272236Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103670816A (en) * | 2012-09-12 | 2014-03-26 | 北汽福田汽车股份有限公司 | Control device and method for desorption of carbon tank and carbon tank desorption control system |
| CN105134422A (en) * | 2015-08-20 | 2015-12-09 | 浙江吉利汽车研究院有限公司 | Vehicle-mounted oil filling and oil and gas recycling system and automobile with same |
| CN115217644A (en) * | 2021-05-10 | 2022-10-21 | 广州汽车集团股份有限公司 | Control method of automobile evaporative emission device |
-
2008
- 2008-07-15 CN CNU2008201279322U patent/CN201272236Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103670816A (en) * | 2012-09-12 | 2014-03-26 | 北汽福田汽车股份有限公司 | Control device and method for desorption of carbon tank and carbon tank desorption control system |
| CN103670816B (en) * | 2012-09-12 | 2016-08-03 | 北汽福田汽车股份有限公司 | Control device, method and canister desorption control system for canister desorption |
| CN105134422A (en) * | 2015-08-20 | 2015-12-09 | 浙江吉利汽车研究院有限公司 | Vehicle-mounted oil filling and oil and gas recycling system and automobile with same |
| CN105134422B (en) * | 2015-08-20 | 2018-01-23 | 浙江吉利汽车研究院有限公司 | Vehicle-mounted oil filling gas recovery system for oil and there is its automobile |
| US10864817B2 (en) | 2015-08-20 | 2020-12-15 | Zhejiang Geely Automobile Research Institute Co., Ltd. | Onboard refueling vapor recovery system and automobile having same |
| CN115217644A (en) * | 2021-05-10 | 2022-10-21 | 广州汽车集团股份有限公司 | Control method of automobile evaporative emission device |
| CN115217644B (en) * | 2021-05-10 | 2023-11-17 | 广州汽车集团股份有限公司 | Control method of automobile evaporation and emission device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090715 |
|
| CX01 | Expiry of patent term |