CN102141500B - Testing method for effective gasoline operational capability of motorbike activated carbon pot and obtained activated carbon pot - Google Patents
Testing method for effective gasoline operational capability of motorbike activated carbon pot and obtained activated carbon pot Download PDFInfo
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- CN102141500B CN102141500B CN201010103531.5A CN201010103531A CN102141500B CN 102141500 B CN102141500 B CN 102141500B CN 201010103531 A CN201010103531 A CN 201010103531A CN 102141500 B CN102141500 B CN 102141500B
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Abstract
The invention relates to a testing method for the effective gasoline operational capability of a motorbike activated carbon pot and the obtained activated carbon pot, wherein the effective gasoline operational capability of the activated carbon pot is used for testing the fuel steam flow of a vehicle in a fuel tank in a daytime aeration loss test; the more complete desorption is carried out on the desorption flow according to the preprocessing working conditions of the tested vehicle; and the desorption flow at the moment is the effective gasoline operational capability of the activated carbon pot. Thus, the invention provides an activated carbon pot device which has the advantages of low cost, good desorption effect and easiness for layout on the tested vehicle, and an evaporation discharge test reaches the standard. According to the invention, the problems that the desorption of a large activated carbon pot is not complete, the discharge exceeds the standard, the installation is difficult, the cost is high and the like are solved, the matching technique of the motorbike activated carbon pot is completely simplified, thus the method and pot provided by the invention have the advantages of clear target, correct direction, distinct thought and extremely strong technical strategy pertinence, can be used for achieving the matching of the motorbike activated carbon pot, reducing the blindness of a fuel evaporation test and enhancing the matching success rate of the activated carbon pot.
Description
Technical field
The present invention relates to a kind of method of testing and gained charcoal canister of motorcycle charcoal canister effective gasoline ability to work.
Background technology
Country was from 1 day July in 2008, come into effect < < motorcycle pollutant emission limit and measuring method (operating condition method) > > (GB14622-2007), < < trail bike pollutant emission limit and measuring method > > (GB18176-2007) and < < motorcycle and trail bike fuel evaporation pollutant emission limit and measuring method > > (GB20998-2007).In motorcycle industry, tackle fuel evaporation rules at present and all adopt charcoal canister adsorbed gasoline steam, fuel evaporation control system and vehicle matching principle are, in the situation that guaranteeing that each pipeline and junction are not leaked, only need to determine that charcoal canister effective gasoline ability to work is greater than fuel tank evaporation capacity and can passes through fuel evaporation rules.Yet charcoal canister effective gasoline ability to work parameter is according to the measurement of test method of < < environmental protection product technical requirement Pollutant of Evaporated Gasoline Vehicle control system (device) > > (HJT390-2007) regulation at present; the charcoal canister effective gasoline ability to work of this measurement of test method is less than normal; the canned charcoal volume of activated charcoal mating with car load is larger, brings following problem in matching process:
1. generally less than normal according to < < environmental protection product technical requirement Pollutant of Evaporated Gasoline Vehicle control system (device) > > (HJT390-2007) regulation test charcoal canister effective gasoline ability to work; while causing mating with motorcycle tank evaporation capacity, select volume larger, the charcoal canister that ability to work is higher.Make the canned charcoal volume of activated charcoal excessive, filling powdered carbon quality and housing cost increase, and cause procurement price too high.
2. because the design desorption rate of control system is definite value, select the excessive charcoal canister internal pressure drops of volume excessive, aeration resistance is excessive, cause charcoal canister desorption when pre-service not thorough, its effective working volume is a part for charcoal canister overall volume, in charcoal canister inside, formed the dead angle of many absorption, by causing, the result of discharge vaporization test is higher, even exceeds discharge vaporization limit value.
3. charcoal canister volume is excessive, causes at vehicle body, to install very difficultly, need to move and even revise body outer skin and meet installation requirement related components, has increased extra cost.
There is larger difference in the method for testing charcoal canister effective gasoline ability to work in the effective gasoline ability to work method of testing of < < environmental protection product technical requirement Pollutant of Evaporated Gasoline Vehicle control system (device) > > (HJT 390-2007) test charcoal canister and claims; mainly contain 3 points, specific as follows:
1. charcoal canister absorption flow
The absorption flow of < < environmental protection product technical requirement Pollutant of Evaporated Gasoline Vehicle control system (device) > > (HJT 390-2007) regulation is constant rate 2.4L/min; and claims regulation charcoal canister absorption flow is the fuel vapor flow in test vehicle diurnal breathing loss process fuel tank; and vapor flow rate can increase with the increase of heating-up temperature; for changing value, average discharge is far smaller than 2.4L/min.
2. gasoline vapour temperature
The gasoline vapour temperature of < < environmental protection product technical requirement Pollutant of Evaporated Gasoline Vehicle control system (device) > > (HJT 390-2007) regulation is steady temperature (52 ± 2) ℃; and during claims regulation test charcoal canister effective gasoline ability to work; gasoline vapour temperature rises to 41 ℃ from 21 ℃ in 60min, and therefore in whole process, the gasoline vapour temperature of charcoal canister absorption is all less than (52 ± 2) ℃.The difference of temperature is brought the difference of absorption flow, causes charcoal canister effective gasoline ability to work different.Fig. 2 data show the impact of environment temperature on charcoal canister effective gasoline ability to work.
3. charcoal canister desorption rate
The desorption flow of < < environmental protection product technical requirement Pollutant of Evaporated Gasoline Vehicle control system (device) > > (HJT 390-2007) regulation is (25 ± 1) L/min or its maximum desorption rate, and desorption gas total amount is 600 times of canned charcoal volumes of activated charcoal.And to the desorption flow of charcoal canister, be relevant to the pre-service operating mode of test vehicle in claims, desorption gas total amount is the desorption rate of test vehicle pre-service operating mode, and now desorption rate depends on the negative pressure in desorption hole, the size in aperture.
That in claims 2, enumerates determines that according to different types of fuel tank the canned charcoal volume of activated charcoal is to be based upon on charcoal canister filling X-type powdered carbon, Fig. 1 is the index parameter of X-type activated carbon powder, if take the better activated carbon powder of serviceability, can further dwindle the canned charcoal volume of activated charcoal.In < < environmental protection product technical requirement Pollutant of Evaporated Gasoline Vehicle control system (device) > > (HJT 390-2007), mention the effective butane working capacity of charcoal canister in addition; the canned charcoal volume of charcoal obtaining is accordingly compared with obtain the canned charcoal volume of charcoal according to effective gasoline ability to work, and volume does not have great difference.
Summary of the invention
For overcoming above-mentioned drawback, the object of the present invention is to provide a kind of method of testing and gained charcoal canister of motorcycle charcoal canister effective gasoline ability to work.
The object of the invention can reach by following technical measures, charcoal canister effective gasoline ability to work method of testing is reappraised, time of day while testing in conjunction with motorcycle fuel evaporation, retests charcoal canister effective gasoline ability to work parameter.The time of day of considering motorcycle fuel evaporation test fuel tank, obtains charcoal canister effective gasoline ability to work according to Fig. 3 test macro.The absorption flow of charcoal canister is the flow of fuel vapor in fuel tank in test vehicle diurnal breathing loss process, temperature variation is followed the regulation of < < motorcycle and trail bike fuel evaporation pollutant emission limit and measuring method > > (GB20998-2007), see Fig. 3, Fig. 4.It comprises the following steps:
1. the absorption flow of charcoal canister effective gasoline ability to work is the flow of fuel vapor in fuel tank in test vehicle diurnal breathing loss process.
2. the desorption flow of charcoal canister effective gasoline ability to work carries out more thorough desorption according to test vehicle pre-service operating mode; Desorption rate is now charcoal canister effective gasoline ability to work.
For same charcoal canister, adopt the effective gasoline ability to work of above-mentioned method of testing test and differ greatly according to the effective gasoline ability to work of the measurement of test method of < < environmental protection product technical requirement Pollutant of Evaporated Gasoline Vehicle control system (device) > > (HJT 390-2007) regulation, the former is far longer than the latter's effective gasoline ability to work at the charcoal canister effective gasoline ability to work of test, can greatly dwindle charcoal canister volume thus, reduce test number (TN), thereby minimizing cost of development, efficiently solve above-mentioned drawback.
The charcoal canister effective gasoline ability to work simultaneously obtaining according to above-mentioned method of testing, determines effective working volume of charcoal canister.For not isometric fuel tank, the evaporation capacity of its fuel tank is different, and the charcoal canister effective gasoline ability to work of Optimum Matching also should difference with it in institute.But in the production application of charcoal canister, consider volume of fuel tank diversity, if each fuel tank is all designed to a charcoal canister for correspondence with it, can increase mold developing cost, EVAP Evaporative System cost of development is increased.Therefore, can take above-mentioned method of testing to retest charcoal canister effective gasoline ability to work.For different classes of fuel tank kind, considering on the basis of safety coefficient, provided respectively the dress charcoal volume scope of the X-type activated carbon powder of charcoal canister filling Fig. 1 description: a. is more than or equal to the fuel tank that 6L is less than 8L, and the canned charcoal volume of activated charcoal matching is more than or equal to 70ml and is less than 80ml; B. be more than or equal to the fuel tank that 8L is less than 10L, the corresponding canned charcoal volume of activated charcoal is more than or equal to 80ml and is less than 90ml with it; C. be more than or equal to the fuel tank that 10L is less than 14L, the corresponding canned charcoal volume of activated charcoal is more than or equal to 90ml and is less than 140ml with it; D. be more than or equal to the fuel tank that 14L is less than 17L, the corresponding canned charcoal volume of activated charcoal is more than or equal to 140ml and is less than 170ml with it; E. be more than or equal to the fuel tank that 17L is less than 20L, the corresponding canned charcoal volume of activated charcoal is more than or equal to 170ml and is less than 200ml with it.
Fig. 5 is that two vehicle is adopting identical fuel evaporation control system and loading the X-type powdered carbon that Fig. 1 describes, and changes the charcoal canister fuel evaporation pollutant emission test results of different dress charcoal volumes.Wherein mate 200ml charcoal tank and be according to the measurement of test method of < < environmental protection product technical requirement Pollutant of Evaporated Gasoline Vehicle control system (device) > > (HJT 390-2007) regulation, and 120ml charcoal tank is the charcoal tank of the content design according to the present invention.
Accompanying drawing explanation
Fig. 1 is the index parameter of charcoal canister filling X-type powdered carbon;
Fig. 2 is the impact of environment temperature on charcoal canister gasoline ability to work;
Fig. 3 is that the present invention assesses charcoal canister effective gasoline ability to work test macro-auxiliary law schematic diagram;
Fig. 4 is charcoal canister desorption test schematic diagram of the present invention;
Fig. 5 is for adopting the charcoal canister exhaust contaminant of vehicle result table of less dress charcoal volume.
At Fig. 3, in Fig. 4,1 is control module, and 2 is heating arrangement, and 3 is fuel tank, 4 is gasoline evaporation route, and 5 is solenoid valve, and 6 is adsorption orifice, and 7 is plug I, 8 is desorption mouth, and 9 is charcoal canister I, and 10 is Precision Electronics Balance I, and 11 is atmospheric air port, 12 is fuel vapor passage, and 13 is adsorption orifice, and 14 is plug II, and 15 is desorption mouth, 16 is charcoal canister II, and 17 is atmospheric air port, and 18 is Precision Electronics Balance II, and 19 is PCV operation valve, the negative pressure signal mouth of carburetor, 21 is carburetor, and 22 is draft tube, and 23 is engine.
Embodiment
Referring to Fig. 3, Fig. 4, when fuel tank 3 according to < < motorcycle and trail bike fuel evaporation pollutant emission limit and measuring method > > (GB20998-2007) in C5.4.9 heating curves formula heating, thermal source and temperature are controlled by heating arrangement 2 and control module 1; Can be at the interior formation steam pressure of fuel tank 3 during fuel evaporation, under certain pressure, steam is along with gasoline evaporation route 4, enters charcoal canister I9 absorbed by activated charcoal from the adsorption orifice 6 of charcoal canister I9.Setting charcoal canister I9 original weight is m
0, when being heated to 60min, by Precision Electronics Balance I10, Precision Electronics Balance II18 observes the weight change of charcoal canister I9 and charcoal canister II16.If the weight of charcoal canister II16 does not change in one hour, now record charcoal canister I9 weight m
1.Now continue to keep fuel vapor temperature, until changing appears in the weight of charcoal canister II16, now record charcoal canister I9 weight m
2, shut electromagnetic valve 5.Take off charcoal canister I9 and carry out desorption test according to the pre-service of regulation in < < motorcycle and trail bike fuel evaporation pollutant emission limit and measuring method > > (GB20998-2007).See Fig. 4.When engine operation reaches certain rotating speed, negative pressure signal mouth 20 places of carburetor produce negative pressure, when it rises to certain pressure, PCV operation valve 19 is opened, desorption mouth 8 negative pressure of charcoal canister I9 make extraneous air enter charcoal canister I9 from atmospheric air port 11 simultaneously, make to be adsorbed on the fuel vapor on activated charcoal in charcoal canister I9 and carry out desorption, then enter engine 23 burnings through carburetor 21 and draft tube 22.Charcoal canister I9, after pre-service, records gravimetric value m now
3, desorption rate (m
2-m
3) be the effective gasoline ability to work of charcoal canister I9, if (m
2-m
3) be more than or equal to (m
1-m
0) can judge that charcoal canister I9 desorption is more thorough, charcoal canister I9 can absorb the fuel vapor of fuel tank 3 completely, meets the demands.If the weight of charcoal canister II16 is increasing in one hour, illustrate that charcoal canister I9 is breakdown, fuel vapor enters charcoal canister I9 by fuel vapor passage 12 from the adsorption orifice 13 of charcoal canister II16 and is absorbed by activated charcoal, charcoal canister I9 does not meet testing requirements, can change the charcoal canister that volume is larger and carry out above-mentioned test, until the weight of charcoal canister II16 does not change in process of the test.
Claims (2)
1. the method for testing of a motorcycle charcoal canister effective gasoline ability to work, it is characterized in that absorption flow is the fuel vapor flow in test vehicle diurnal breathing loss test fuel tank, desorption flow carries out according to test vehicle pre-service operating mode, the desorption rate obtaining is charcoal canister effective gasoline ability to work, and it comprises the following steps:
1) absorption flow of charcoal canister effective gasoline ability to work is the fuel vapor flow in test vehicle diurnal breathing loss process fuel tank;
2) the desorption flow of charcoal canister effective gasoline ability to work carries out more thorough desorption according to test vehicle pre-service operating mode; Desorption rate is now charcoal canister effective gasoline ability to work.
2. the method for testing gained charcoal canister of motorcycle charcoal canister effective gasoline ability to work according to claim 1, it is characterized in that: for different classes of fuel tank kind, considering on the basis of safety coefficient, provided respectively the dress charcoal volume scope of the X-type activated carbon powder of charcoal canister filling Fig. 1 description: a. is more than or equal to the fuel tank that 6L is less than 8L, and the canned charcoal volume of activated charcoal matching is more than or equal to 70ml and is less than 80ml; B. be more than or equal to the fuel tank that 8L is less than 10L, the corresponding canned charcoal volume of activated charcoal is more than or equal to 80ml and is less than 90ml with it; C. be more than or equal to the fuel tank that 10L is less than 14L, the corresponding canned charcoal volume of activated charcoal is more than or equal to 90ml and is less than 140ml with it; D. be more than or equal to the fuel tank that 14L is less than 17L, the corresponding canned charcoal volume of activated charcoal is more than or equal to 140ml and is less than 170ml with it; E. be more than or equal to the fuel tank that 17L is less than 20L, the corresponding canned charcoal volume of activated charcoal is more than or equal to 170ml and is less than 200ml with it.
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| CN102141500B true CN102141500B (en) | 2014-04-16 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105781696B (en) * | 2014-12-22 | 2018-03-02 | 上海机动车检测认证技术研究中心有限公司 | A kind of automobile canister experimental rig |
| CN105427404B (en) * | 2015-11-06 | 2017-12-19 | 清华大学 | Motor vehicle actual condition oil-gas generation and desorption vehicle carried data collecting system and method |
| CN106769104B (en) * | 2017-02-15 | 2023-10-20 | 中国汽车技术研究中心有限公司 | Fuel system carbon tank desorption calibration data acquisition system |
| CN108918281A (en) * | 2018-07-13 | 2018-11-30 | 奇瑞汽车股份有限公司 | A kind of simple charcoal canister breakdown test rack |
| CN110793785A (en) * | 2019-11-21 | 2020-02-14 | 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 |
| CN116481825A (en) * | 2023-03-08 | 2023-07-25 | 中国环境科学研究院 | Test method for simplifying whole vehicle emission and operation loss |
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Effective date of registration: 20180920 Address after: 402760 111 Yongjia Avenue, Bi Quan street, Bishan District, Chongqing. Patentee after: Chongqing Jialing Industrial Co., Ltd. Address before: 400032 Chongqing Shapingba District double monument 2301 mail box Patentee before: China Jialing Industry Co., Ltd. (Group) |
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