CN105781696A - Car carbon canister test device - Google Patents
Car carbon canister test device Download PDFInfo
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- CN105781696A CN105781696A CN201410821426.3A CN201410821426A CN105781696A CN 105781696 A CN105781696 A CN 105781696A CN 201410821426 A CN201410821426 A CN 201410821426A CN 105781696 A CN105781696 A CN 105781696A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Supplying Secondary Fuel Or The Like To Fuel, Air Or Fuel-Air Mixtures (AREA)
- Testing Of Engines (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a car carbon canister test device. The test device can be used for meeting the requirement of an adsorption test and a desorption test, and the requirement of the car national IV criteria for the initial work capability test of a carbon canister can be met. According to the technical scheme, a gas pipeline of the carbon canister test device is redesigned, a gas flow is improved, the test state of a tested carbon canister is consistent with the running state of the carbon canister in a car, and therefore the test precision and data stability are greatly improved. Through control over the opening and closing motion of all electromagnetic valves through a PLC, the carbon canister simulation adsorption capability test, the carbon canister simulation desorption capability test and the carbon canister initial work capability test can be met in the same pipeline-connection carbon canister test device, and therefore full-automatic recycling of a benchmark carbon canister is achieved, and equipment measurement difficulties are reduced.
Description
Technical field
The present invention relates to car carbon tank test, particularly relate to same set of assay device can complete adsorption test also can complete desorption test technology.
Background technology
At present, as it is shown in figure 1, there is test function single (only having single absorption or desorption test) the problem that there is test stability, poor repeatability in the principle of the car carbon tank testing equipment on market.Process of the test needs to use simultaneously with reference to canister owing to being in passive adsorption state over a long time, it is necessary to continuous renewal, largely effect on conventional efficient.
Owing to canister is the very important control device that discharges pollutants on automobile, control the core component of vehicle fuel evaporation capacity especially, therefore automobile can be demarcated exploitation by false test data, sizing cause negative impact, and then be further exacerbated by the increase of the pollution of atmospheric environment, automobile fuel consumption amount.
Relevant document also discloses that the principle of part canister testing equipment, the main cause causing its result of the test unstable by analysis be the trystate of canister and canister actual working state on vehicle incomplete same, this development goal having resulted in actual canister work efficiency and Automobile Enterprises has had bigger deviation.
At the beginning of 2014, Light-duty Vehicle state five of China discharge standard GB18352.5 2013 " light-duty vehicle pollutant emission limit and measuring method (the 5th stage of China) " puts into effect, wherein require before evaporative pollutants emission testing to carry out canister adsorption test, and increased " test of canister initial operating capability " newly.As newly-increased supporting authentication item important in state five standard, each big vehicle manufacturers all has bigger test demand after regulation is put into effect, but current assay device is difficult to meet this test demand.
Summary of the invention
The brief overview of one or more aspect given below is to provide the basic comprehension to these aspects.This summarizes the extensive overview of the not all aspect contemplated, and is both not intended to identify the key or decisive key element also non-scope attempting to define any or all aspect of all aspects.Its some concepts being uniquely intended to provide in simplified form one or more aspect think the sequence of more detailed description given later.
It is an object of the invention to solve the problems referred to above, it is provided that a kind of car carbon tank assay device, available test battery device meets adsorption test and the demand of desorption test, it is also possible to meet the demand that automobile state five standard initial operating capability to canister is tested.
nullThe technical scheme is that and present invention is disclosed a kind of car carbon tank assay device，Device includes programmable control circuit、First electronic balance、Second electronic balance、Test canister、Benchmark canister，Wherein test canister is positioned on the first electronic balance，Benchmark canister is positioned on the second electronic balance，The adsorption orifice of test canister connects the mixing source of the first gas source and the second gas source by the first electromagnetic valve，The desorption mouth of test canister connects the first threeway by the second electromagnetic valve，The atmosphere entry of test canister connects the second threeway，The adsorption orifice of benchmark canister connects the second threeway by the 3rd electromagnetic valve，The desorption mouth of benchmark canister connects the first threeway by the 4th electromagnetic valve，Atmosphere entry connection the 3rd threeway of benchmark canister，Second threeway connection the 4th threeway，4th threeway connects the second independent gas source by the 5th electromagnetic valve，4th threeway connection the 3rd threeway，3rd threeway is by the 6th electromagnetic valve connection the 5th threeway，5th threeway connects the first threeway by the 7th electromagnetic valve，5th threeway connection outlet port，Programmable control circuit is by the first electromagnetic valve、Second electromagnetic valve、3rd electromagnetic valve、4th electromagnetic valve、5th electromagnetic valve、The control of the 6th electromagnetic valve and the 7th electromagnetic valve，Implement the mixing gas trend in a device of the first gas and the second gas.
One embodiment of the car carbon tank assay device according to the present invention, is respectively mounted gas flowmeter at the first gas source place and the second gas source place.
One embodiment of the car carbon tank assay device according to the present invention, the first gas is the simulation gas of gasoline vapor, and the second gas is to clean gas.
One embodiment of the car carbon tank assay device according to the present invention, in the emulation adsorption test of test canister, programmable control circuit is by the control to the first electromagnetic valve, the second electromagnetic valve, the 3rd electromagnetic valve, the 4th electromagnetic valve, the 5th electromagnetic valve, the 6th electromagnetic valve and the 7th electromagnetic valve, first the mixing gas making the first gas and the second gas enter the adsorption orifice of test canister from mixing source, after being then passed through the test atmosphere entry of canister, the adsorption orifice of benchmark canister and the atmosphere entry of benchmark canister, finally discharge from outlet port.
One embodiment of the car carbon tank assay device according to the present invention, in the emulation desorption test of test canister, programmable control circuit is by the control to the first electromagnetic valve, the second electromagnetic valve, the 3rd electromagnetic valve, the 4th electromagnetic valve, the 5th electromagnetic valve, the 6th electromagnetic valve and the 7th electromagnetic valve, make the second gas first be respectively enterd the atmosphere entry of test canister and benchmark canister by the 4th threeway from the second independent gas source simultaneously, then respectively enter the desorption mouth of test canister and benchmark canister simultaneously, be aggregated into outlet port finally by the 5th threeway and discharge.
One embodiment of the car carbon tank assay device according to the present invention, in the initial operating capability test of test canister, programmable control circuit, by the control to the first electromagnetic valve, the second electromagnetic valve, the 3rd electromagnetic valve, the 4th electromagnetic valve, the 5th electromagnetic valve, the 6th electromagnetic valve and the 7th electromagnetic valve, repeats emulation adsorption test and the emulation desorption test of test canister.
The present invention contrasts prior art following beneficial effect: the present invention has redesigned the gas piping of canister assay device, improve gas flow process, the trystate making test canister is consistent with running status in the car, thus substantially increasing the stability of test accuracy and data.By the Programmable Logic Controller circuit (PLC) control to the on-off action of each electromagnetic valve, the emulation absorbability test of canister, the emulation desorption ability test of canister and the initial operating capability of canister can be met in the canister assay device that same set of pipeline connects test, it is achieved thereby that the full-automatic reusable edible of benchmark canister, reduce the difficulty of equipment metering.
Accompanying drawing explanation
Fig. 1 illustrates the structure of traditional car carbon tank assay device.
Fig. 2 illustrates that the car carbon tank assay device of the present invention emulates the schematic diagram in adsorption test in canister.
Fig. 3 illustrates that the car carbon tank assay device of the present invention emulates the schematic diagram in desorption test in canister.
Fig. 4 illustrates the car carbon tank assay device of present invention schematic diagram in canister initial operating capability is tested.
Detailed description of the invention
After reading the detailed description that embodiment of the disclosure in conjunction with the following drawings, it is possible to be more fully understood that features described above and the advantage of the present invention.In the accompanying drawings, each assembly is not necessarily drawn to scale, and the assembly with similar correlation properties or feature is likely to be of same or like accompanying drawing labelling.
First canister operation principle on automobile and effect are introduced.Fuel tank often fills up gasoline vapour at normal temperatures, and gasoline car fuel tank, when temperature changes with pressure, can make a large amount of gasoline vapour by passage discharged in air.The effect of evaporative emission control system is steam to be introduced burning and prevents from evaporateing in air.What this process played an important role is charcoal canister.Activated carbon has adsorption function, when automobilism or flame-out time, the gasoline vapour of fuel tank by pipeline enter charcoal canister top, fresh air then from charcoal canister bottom enter charcoal canister.After engine misses, gasoline vapour and fresh air in in-tank mixing and are stored in charcoal canister, when, after engine start, the valve of the EVAP purifier being contained between charcoal canister and inlet manifold is opened, the gasoline vapour in charcoal canister is inhaled into inlet manifold and participates in burning.Thus decreasing leaking of oil gas, being conducive to protection environment and saving the energy.
Fig. 2 illustrates that the car carbon tank assay device of the present invention emulates the principle in adsorption test in canister, Fig. 3 illustrates that the car carbon tank assay device of the present invention emulates the principle in desorption test in canister, and Fig. 4 illustrates the car carbon tank assay device of present invention principle in canister initial operating capability is tested.It is all identical that pipeline in these three test connects.
Please referring also to Fig. 2 to Fig. 4, the car carbon tank assay device of the present invention includes programmable control circuit the 1, first electronic balance the 2, second electronic balance 3, test canister 4, benchmark canister 5, wherein test canister 4 is positioned on the first electronic balance 2, and benchmark canister 5 is positioned on the second electronic balance 3.
The adsorption orifice 4a of test canister 4 connects the first gas source (in the present embodiment for butane by the first electromagnetic valve 61, simulation gas as gasoline vapor) and the second gas source (be nitrogen in this embodiment, as cleaning gas) mixing source, be respectively mounted gas flowmeter 81 and 82 as mixing first gas source in source and the second gas source place.The desorption mouth 4b of test canister 4 connects the first threeway 71 by the second electromagnetic valve 62, and the atmosphere entry 4c of test canister 4 connects the second threeway 72.
The adsorption orifice 5a of benchmark canister 5 connects the second threeway 72 by the 3rd electromagnetic valve 63, and the desorption mouth 5b of benchmark canister 5 connects the first threeway 71 by the 4th electromagnetic valve 64, and the atmosphere entry 5c of benchmark canister 5 connects the 3rd threeway 73.Second threeway 72 connects the 4th threeway 74, and the 4th threeway 74 connects independent the second gas source (in the present embodiment for nitrogen) by the 5th electromagnetic valve 65, and gas flowmeter 83 is installed at this second independent gas source place.4th threeway 74 connects the 3rd threeway 73, and the 3rd threeway 73 connects the 5th threeway 75 by the 6th electromagnetic valve 66, and the 5th threeway 75 connects the first threeway 71 by the 7th electromagnetic valve 67, and the 5th threeway 75 connects outlet port.
Programmable control circuit 1, by the control to first electromagnetic valve the 61, second electromagnetic valve the 62, the 3rd electromagnetic valve the 63, the 4th electromagnetic valve the 64, the 5th electromagnetic valve the 65, the 6th electromagnetic valve 66 and the 7th electromagnetic valve 67, implements the first gas (in the present embodiment for butane) and the mixing gas trend in a device of the second gas (in the present embodiment for nitrogen).
Fig. 2 illustrates that the car carbon tank assay device of the present invention emulates the gas flow in adsorption test in canister.The adsorption test of canister is to use canister pretreatment unit to carry out canister absorption, adopt 50% volume butane and the gaseous mixture of 50% volume nitrogen, canister is made to adsorb with the flow of 40g/h butane, when canister adsorption test, first press Fig. 2 connecting test canister and the benchmark canister of an auxiliary, then use the gaseous mixture simulated oil steam of 50% volume butane and 50% volume nitrogen that canister is adsorbed.The mixing ratio of butane/nitrogen, flow and pressure can accurately control.The first electronic balance 2 and the second electronic balance 3 is used to measure canister weight change trend in processing procedure record.In processing procedure, the oil vapour of gaseous mixture simulation initially enters test canister 4.After test canister 4 absorption is full, oil vapour can enter the benchmark canister 5 of auxiliary naturally；When the quality of benchmark canister 5 increases 2g, then stop test, it is believed that test canister 4 is adsorbed completely.
Native system only need to connect the total interface (adsorption orifice of upper test canister 4 and benchmark canister 5 by Fig. 2, desorption mouth, atmosphere entry), programmable control circuit 1 is by the first electromagnetic valve 61, second electromagnetic valve 62, 3rd electromagnetic valve 63, 4th electromagnetic valve 64, 5th electromagnetic valve 65, the control that gas is moved towards by the control realization of the 6th electromagnetic valve 66 and the 7th electromagnetic valve 67, the trend of the gaseous mixture of butane and nitrogen is: initially enter the atmosphere entry 5c outlet port 9 of the adsorption orifice 5a benchmark canister of the atmosphere entry 4c benchmark canister of the adsorption orifice 4a test canister of test canister 4, the fully automated control of overall process completes, gas trend regulates by automatically controlling of multiple electromagnetic valves, accurate simulation canister real work state on automobile.
Fig. 3 illustrates that the car carbon tank assay device of the present invention emulates the gas flow in desorption test in canister.For simulation test canister duty of real iterative cycles recycling on automobile, state five discharge standard also specify the code of canister desorption test, test requirements document uses (air or nitrogen) to test canister with the flow desorption of 25 ± 5L/min, until it reaches 300 times of canister bed volumes.
Native system only need to connect upper test canister 4 and benchmark canister 5 total interface (adsorption orifice, desorption mouth, atmosphere entry), the programmable control circuit 1 control by gas is moved towards by the control realization of first electromagnetic valve the 61, second electromagnetic valve the 62, the 3rd electromagnetic valve the 63, the 4th electromagnetic valve the 64, the 5th electromagnetic valve the 65, the 6th electromagnetic valve 66 and the 7th electromagnetic valve 67 by Fig. 3.Nitrogen will as cleaning gas, the trend of concrete nitrogen is: first the desorption mouth 5b of desorption mouth 4b and benchmark canister that the atmosphere entry 5c of atmosphere entry 4c and benchmark canister 5 that nitrogen respectively enters test canister 4 by threeway 74 simultaneously respectively enters test canister simultaneously is aggregated into outlet port 9 by threeway 71, the fully automated control of overall process completes, gas trend regulates by automatically controlling of multiple electromagnetic valves, accurate simulation canister real work state on automobile.The present invention, by the design to system pipeline, electromagnetic valve, can test canister and benchmark canister by desorption simultaneously.
Fig. 4 illustrates the gas flow in canister initial operating capability is tested of the car carbon tank assay device of the present invention.The test of canister initial operating capability is the pilot project that state five discharge standard is newly-increased, is also the test function not available for legacy car carbon tank assay device.
Concrete test cycle more complicated (detailed testing regulations is shown in HJ/T390 " Pollutant of Evaporated Gasoline Vehicle control system " 5.2 chapters and sections), have main steps that 6 circulations of repetition (canister adsorption test+canister desorption test), and record the meansigma methods of the canister quality of adsorption of the 5th, 6 circulations, afterwards in conjunction with canister dischargeable capacity value, finally draw canister initial operating capability value.
After this test only need to connect upper test canister and benchmark canister total interface (adsorption orifice, desorption mouth, atmosphere entry) by Fig. 4, system incites somebody to action automatically repeatedly operation function one (the emulation absorption shown in Fig. 2) and function two (the emulation desorption shown in Fig. 3), the brand-new control mode of the pipeline connecting mode brand-new due to the present invention and system electromagnetic valve makes test canister and benchmark canister can circulate and empty, need not manually change benchmark canister, all contents of the test can be automatically performed.
The car carbon tank assay device of the present invention is mainly used in meeting automobile state five discharge standard and the total Test of canister requires (the initial operating capability test emulating adsorption test, the emulation desorption test of canister, canister of canister), simultaneously can also to the various charcoal canisters of different automobile types, simulation canister applying working condition on vehicle, measures in real time to canister situation.
Compared with prior art, advantages of the present invention is as follows:
1) test good stability, test accuracy are high: by the improvement of gas flow chart and perfect, by system pipeline, control system Rule of judgment are redesigned, the trystate making test canister is consistent with the running status at automobile, thus substantially increasing the stability of test accuracy and data.
2) " canister dischargeable capacity " test function is added, so as to meet up-to-date state five discharge standard.
3) achieve can be recycled of " benchmark canister ", improve test efficiency.
4) demarcate, overhaul conveniently: originally single system decomposition is become two autonomous systems freely switched, it is simple to equipment calibration and maintenance.
Thering is provided of this disclosure being previously described is for making any person skilled in the art all can make or use the disclosure.Various amendment of this disclosure all will be apparent from for a person skilled in the art, and the generic principles defined herein can be applied to other variants spirit or scope without departing from the disclosure.Thus, the disclosure is not intended to be limited to example described herein and design, but with disclosed herein principle and novel features consistent the widest scope should be awarded.
Claims (6)
- null1. a car carbon tank assay device，It is characterized in that，Device includes programmable control circuit、First electronic balance、Second electronic balance、Test canister、Benchmark canister，Wherein test canister is positioned on the first electronic balance，Benchmark canister is positioned on the second electronic balance，The adsorption orifice of test canister connects the mixing source of the first gas source and the second gas source by the first electromagnetic valve，The desorption mouth of test canister connects the first threeway by the second electromagnetic valve，The atmosphere entry of test canister connects the second threeway，The adsorption orifice of benchmark canister connects the second threeway by the 3rd electromagnetic valve，The desorption mouth of benchmark canister connects the first threeway by the 4th electromagnetic valve，Atmosphere entry connection the 3rd threeway of benchmark canister，Second threeway connection the 4th threeway，4th threeway connects the second independent gas source by the 5th electromagnetic valve，4th threeway connection the 3rd threeway，3rd threeway is by the 6th electromagnetic valve connection the 5th threeway，5th threeway connects the first threeway by the 7th electromagnetic valve，5th threeway connection outlet port，Programmable control circuit is by the first electromagnetic valve、Second electromagnetic valve、3rd electromagnetic valve、4th electromagnetic valve、5th electromagnetic valve、The control of the 6th electromagnetic valve and the 7th electromagnetic valve，Implement the mixing gas trend in a device of the first gas and the second gas.
- 2. car carbon tank assay device according to claim 1, it is characterised in that be respectively mounted gas flowmeter at the first gas source place and the second gas source place.
- 3. car carbon tank assay device according to claim 1, it is characterised in that the first gas is the simulation gas of gasoline vapor, the second gas is to clean gas.
- 4. car carbon tank assay device according to claim 1, it is characterized in that, in the emulation adsorption test of test canister, programmable control circuit is by the control to the first electromagnetic valve, the second electromagnetic valve, the 3rd electromagnetic valve, the 4th electromagnetic valve, the 5th electromagnetic valve, the 6th electromagnetic valve and the 7th electromagnetic valve, first the mixing gas making the first gas and the second gas enter the adsorption orifice of test canister from mixing source, after being then passed through the test atmosphere entry of canister, the adsorption orifice of benchmark canister and the atmosphere entry of benchmark canister, finally discharge from outlet port.
- 5. car carbon tank assay device according to claim 1, it is characterized in that, in the emulation desorption test of test canister, programmable control circuit is by the first electromagnetic valve, second electromagnetic valve, 3rd electromagnetic valve, 4th electromagnetic valve, 5th electromagnetic valve, the control of the 6th electromagnetic valve and the 7th electromagnetic valve, make the second gas first be respectively enterd the atmosphere entry of test canister and benchmark canister by the 4th threeway from the second independent gas source simultaneously, then respectively enter the desorption mouth of test canister and benchmark canister simultaneously, it is aggregated into outlet port finally by the 5th threeway to discharge.
- 6. car carbon tank assay device according to claim 1, it is characterized in that, in the initial operating capability test of test canister, programmable control circuit, by the control to the first electromagnetic valve, the second electromagnetic valve, the 3rd electromagnetic valve, the 4th electromagnetic valve, the 5th electromagnetic valve, the 6th electromagnetic valve and the 7th electromagnetic valve, repeats emulation adsorption test and the emulation desorption test of test canister.
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| CN201410821426.3A CN105781696B (en) | 2014-12-22 | 2014-12-22 | A kind of automobile canister experimental rig |
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| CN201410821426.3A CN105781696B (en) | 2014-12-22 | 2014-12-22 | A kind of automobile canister experimental rig |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106769104A (en) * | 2017-02-15 | 2017-05-31 | 中国汽车技术研究中心 | Fuel system canister is desorbed nominal data acquisition system |
| CN108827645A (en) * | 2018-03-27 | 2018-11-16 | 江铃汽车股份有限公司 | The hydrocarbon discharge vaporization test method of fuel system |
| CN109209684A (en) * | 2018-08-01 | 2019-01-15 | 上海机动车检测认证技术研究中心有限公司 | A kind of canister desorption detection device |
| CN109612872A (en) * | 2018-12-11 | 2019-04-12 | 江铃汽车股份有限公司 | A kind of canister development approach meeting six discharge vaporization regulation of state |
| CN109900496A (en) * | 2019-03-15 | 2019-06-18 | 堀场仪器（上海）有限公司 | Canister pilot system and its operating method |
| CN110441186A (en) * | 2019-09-05 | 2019-11-12 | 上海机动车检测认证技术研究中心有限公司 | A kind of canister pilot system and its test method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106769104A (en) * | 2017-02-15 | 2017-05-31 | 中国汽车技术研究中心 | Fuel system canister is desorbed nominal data acquisition system |
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| CN109612872B (en) * | 2018-12-11 | 2021-06-15 | 江铃汽车股份有限公司 | Carbon tank development method meeting national six-evaporative emission regulations |
| CN109900496A (en) * | 2019-03-15 | 2019-06-18 | 堀场仪器（上海）有限公司 | Canister pilot system and its operating method |
| CN110441186A (en) * | 2019-09-05 | 2019-11-12 | 上海机动车检测认证技术研究中心有限公司 | A kind of canister pilot system and its test method |
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