CN105699021A - Vehicle fuel evaporation system air tightness detection method - Google Patents
Vehicle fuel evaporation system air tightness detection method Download PDFInfo
- Publication number
- CN105699021A CN105699021A CN201610020977.9A CN201610020977A CN105699021A CN 105699021 A CN105699021 A CN 105699021A CN 201610020977 A CN201610020977 A CN 201610020977A CN 105699021 A CN105699021 A CN 105699021A
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- pressure
- vehicle
- vehicle fuel
- evaporation system
- fuel evaporation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Supplying Secondary Fuel Or The Like To Fuel, Air Or Fuel-Air Mixtures (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
Abstract
The invention discloses a vehicle fuel evaporation system air tightness detection method. The method comprises the following steps of closing an automobile engine and connecting an outlet end pipeline of a flowmeter of test equipment to a vehicle fuel evaporation system inlet; disconnecting a vehicle storage battery cathode line and opening a pressure source to pressurize, wherein a pressure value is 3-15kPa; and maintaining the pressure for 10-50 minutes, wherein when decrease of a pressure maintaining pressure value is less than or equal to 0.1%, a fuel system does not leaked; and when the decrease of the pressure maintaining pressure value is greater than 0.1%, leakage exists in the fuel system. Through the pressure source, pressure is slowly exerted on the vehicle fuel evaporation system via a delivery pipe; and air is dried and processed by a gas cleaning apparatus and then reaches the vehicle fuel evaporation system so that starting performance of a vehicle is not influenced. The method is suitable for air tightness detection of any gasoline car fuel evaporation system and generalization is high. Pressure supply of equipment is fast and stable, test time is short and efficiency is high. Operation is simple and the method is convenient for popularization and application.
Description
Technical field
The present invention relates to airtight detection technique field, be specifically related to a kind of suitable in vehicle fuel vapo(u)rization system air-tightness detection method。
Background technology
Evaporative pollutants emission testing is the national legislation test have to passed through before vehicle listing。The air-tightness degree of vehicle fuel vapo(u)rization system largely effects on passing through of evaporative pollutants emission testing。
Evaporative pollutants discharges, and refers to outside car exhaust pipes, from the carbon compound steam of fuel (gasoline) system loss of automobile, including:
(1) hot soak loss: after running car a period of time, stands the carbon compound of the fuel vaporization system discharge of automobile。
(2) fuel tank breathing loss (gas exchange loss): due to the carbon compound of variations in temperature discharge in fuel tank。
The detected content of evaporative pollutants emission testing is mainly Hydrocarbon produced by vehicle fuel vapo(u)rization system, cleans valve and connecting line etc. including group refueling lid, oil filler neck, fuel tank, canister assembly, canister。Test requirements document vehicle, through hot soak loss and gas exchange loss discharges round the clock Hydrocarbon quality sum, is not more than 2g。
At present, the bubble-tight detection of vehicle fuel vapo(u)rization system being adopted two kinds of methods, one is that vehicle moves to production line or test chamber, uses fixing large-scale detection equipment to test the air-tightness of its EVAP Evaporative System。But its equipment of this method structure complexity, pipeline mostly is metal hard tube, and equipment is heavy irremovable, is not easy to vehicle in field operation。Two is drive vehicle into confined chamber, does evaporative pollutants emission testing, is judged the air-tightness of fuel system by result of the test。But this method, confined chamber is required strict, cost is high, every time detection testing expenses unit up to ten thousand, and cost is high。
Summary of the invention
It is an object of the invention to provide a kind of airtight method of testing of vehicle fuel vapo(u)rization system, solve test environment of the prior art restricted, use equipment is fixed, the defect that testing expense cost is high, it is achieved the randomness of testing location and environment, the purpose that equipment cost is low。
The present invention realizes above-mentioned purpose by the following technical solutions。Vehicle fuel vapo(u)rization system air-tightness detection method, pressure source outlet is connected with triple valve inlet through Manual one-way valve and air purifier successively by pipeline, the outlet of three-way valve one end is connected with Pressure gauge by pipeline, other end outlet is connected with vehicle fuel vapo(u)rization system through effusion meter by pipeline, and its airtight testing procedure is as follows:
1) closing automobile electromotor, and the port of export pipeline of the effusion meter of this test equipment is connected vehicle fuel vapo(u)rization system import；
2) disconnecting vehicle accumulator negative line, open pressure source pressurization, force value is 3～15kPa；
3) closing Manual one-way valve, Pressure gauge is shown as dwell pressure, pressurize 10～50 minutes；
4) pressure when record pressurize terminates, when dwell pressure value decline≤0.1%, fuel system is not revealed；As dwell pressure value decline > 0.1%, there is leakage in fuel system。
The present invention is slowly pressed to vehicle fuel vapo(u)rization system through conveying pipe by pressure source, and piezometer display applies pressure, and effusion meter shows by flow, and pressurizer guarantees that the pressure arrived in EVAP Evaporative System is not revealed。Air is by, after gas cleaning plant dried, arriving vehicle fuel vapo(u)rization system, it is ensured that enters the cleaning gas within vehicle fuel vapo(u)rization system, free from admixture, does not affect the startability of vehicle。Suitable in the air-leakage test of any gasoline car EVAP Evaporative System, generalization is high。This equipment voltage supply is fast, stable, and the testing time is short, and efficiency is high, simple to operate, it is simple to popularization and application。
Accompanying drawing explanation
Fig. 1 is the system structure schematic diagram of the present invention。
In figure: 1. pressure source, 2. gas transmission pipeline, 3. Manual one-way valve, 4. air purifier, 5. three-way valve, 6. Pressure gauge, 7. effusion meter, 8. vehicle fuel vapo(u)rization system。
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described。Referring to Fig. 1, vehicle fuel vapo(u)rization system air-tightness detection method, pressure source 1 is exported and is connected with three-way valve 5 entrance through Manual one-way valve 3 and air purifier 4 successively by pipeline 2, the outlet of three-way valve 5 one end is connected with Pressure gauge 6 by pipeline 2, other end outlet is connected with vehicle fuel vapo(u)rization system 8 through effusion meter 7 by pipeline 2, and its airtight testing procedure is as follows:
1) closing automobile electromotor, and the port of export pipeline 2 of the effusion meter 7 of this test equipment is connected vehicle fuel vapo(u)rization system 8 import；
2) disconnecting vehicle accumulator negative line, to prevent vehicle fire, open pressure source 1 and pressurize, force value is 3～15kPa；
3) closing Manual one-way valve 3, Pressure gauge 6 is shown as dwell pressure, pressurize 10～50 minutes；
4) pressure when record pressurize terminates, when dwell pressure value decline≤0.1%, fuel system is not revealed；As dwell pressure value decline > 0.1%, there is leakage in fuel system。
Embodiment 1:Test: connect flexible gas transmission pipeline 2 to vehicle fuel vapo(u)rization system import, by pressure source 1 manual pressure to requiring pressure, closes pressurizer 3 and carries out pressurize。Off-test, opens pressurizer 3 pressure release, and disconnects the connection of gas transmission pipeline 2 and vehicle fuel vapo(u)rization system。Pressure source 1 moulding pressure value is 3～5kPa；Namely Pressure gauge 6 is shown as dwell pressure, stops pressurization, and pressurize 50 minutes；When pressurize terminates, recording dwell pressure decline situation, when force value declines, when being shown as the 0.08% of dwell pressure value, fuel system is not revealed；When force value declines, when being shown as the 0.15% of dwell pressure value, there is leakage in fuel system。
Embodiment 2:Pressure source 1 moulding pressure value is 5-8kPa；Namely Pressure gauge 6 is shown as dwell pressure, stops pressurization, and pressurize 40 minutes, and other are identical with embodiment 1。
Embodiment 3:Pressure source 1 moulding pressure value is 8 ~ 12kPa；Namely Pressure gauge 6 is shown as dwell pressure, stops pressurization, and pressurize 30 minutes, and other are identical with embodiment 1。
Embodiment 4:Pressure source 1 moulding pressure value is 12 ~ 15kPa；Namely Pressure gauge 6 is shown as dwell pressure, stops pressurization, and pressurize 10 ~ 20 minutes, and other are identical with embodiment 1。
The present invention passes through the airtight test equipment of vehicle fuel vapo(u)rization system, and the gas transmission pipeline 2 being connected with pressure source 1 is embedded with groove type snap joint, and the import with pressurizer matches, it is achieved be quickly connected with pressurizer。Being equipped with plug-in type conversion equipment on the gas transmission pipeline 2 being connected with vehicle fuel vapo(u)rization system 8, its caliber matches with the caliber of vehicle fuel vapo(u)rization system import。The present invention can realize any gasoline vehicle is carried out EVAP Evaporative System airtight detection whenever and wherever possible。
Claims (1)
1. vehicle fuel vapo(u)rization system air-tightness detection method, pressure source (1) outlet is connected with three-way valve (5) entrance through Manual one-way valve (3) and air purifier (4) successively by pipeline (2), the outlet of three-way valve (5) one end is connected with Pressure gauge (6) by pipeline (2), other end outlet is connected with vehicle fuel vapo(u)rization system (8) through effusion meter (7) by pipeline (2), and its airtight testing procedure is as follows:
1) closing automobile electromotor, and the port of export pipeline (2) of the effusion meter (7) of this test equipment is connected vehicle fuel vapo(u)rization system (8) import；
2) disconnecting vehicle accumulator negative line, open pressure source (1) pressurization, force value is 3～15kPa；
3) closing Manual one-way valve (3), Pressure gauge (6) is shown as dwell pressure, pressurize 10～50 minutes；
4) pressure when record pressurize terminates, when dwell pressure value decline≤0.1%, fuel system is not revealed；As dwell pressure value decline > 0.1%, there is leakage in fuel system。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610020977.9A CN105699021A (en) | 2016-01-13 | 2016-01-13 | Vehicle fuel evaporation system air tightness detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610020977.9A CN105699021A (en) | 2016-01-13 | 2016-01-13 | Vehicle fuel evaporation system air tightness detection method |
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| CN105699021A true CN105699021A (en) | 2016-06-22 |
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| CN201610020977.9A Pending CN105699021A (en) | 2016-01-13 | 2016-01-13 | Vehicle fuel evaporation system air tightness detection method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106441933A (en) * | 2016-09-21 | 2017-02-22 | 奇瑞汽车股份有限公司 | Fuel oil system air permeability testing frame and its testing method |
| CN108332925A (en) * | 2017-12-30 | 2018-07-27 | 芜湖慧盈自动化设备有限公司 | A kind of bottle leak-checking apparatus |
| CN108344545A (en) * | 2017-12-30 | 2018-07-31 | 芜湖慧盈自动化设备有限公司 | A kind of automatic gripper detection device of bottle |
| CN110095228A (en) * | 2019-05-29 | 2019-08-06 | 深圳市康士柏实业有限公司 | For the detection of fuel evaporation checkout and diagnosis equipment and the test macro and test method of measurement and calibration |
| CN110274799A (en) * | 2019-06-20 | 2019-09-24 | 神龙汽车有限公司 | The discharge vaporization test device and test method of auto parts and components |
| CN110657926A (en) * | 2019-10-11 | 2020-01-07 | 安徽江淮汽车集团股份有限公司 | Device and method for detecting leakage of fuel evaporation system |
| CN111947854A (en) * | 2020-08-13 | 2020-11-17 | 安徽高坚机械科技有限公司 | Air tightness detection device for automobile fuel oil high-pressure pump |
| CN112857821A (en) * | 2020-12-24 | 2021-05-28 | 联合汽车电子有限公司 | Failure recognition device and failure recognition method for fuel distribution pipe assembly |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106441933A (en) * | 2016-09-21 | 2017-02-22 | 奇瑞汽车股份有限公司 | Fuel oil system air permeability testing frame and its testing method |
| CN108332925A (en) * | 2017-12-30 | 2018-07-27 | 芜湖慧盈自动化设备有限公司 | A kind of bottle leak-checking apparatus |
| CN108344545A (en) * | 2017-12-30 | 2018-07-31 | 芜湖慧盈自动化设备有限公司 | A kind of automatic gripper detection device of bottle |
| CN110095228A (en) * | 2019-05-29 | 2019-08-06 | 深圳市康士柏实业有限公司 | For the detection of fuel evaporation checkout and diagnosis equipment and the test macro and test method of measurement and calibration |
| CN110274799A (en) * | 2019-06-20 | 2019-09-24 | 神龙汽车有限公司 | The discharge vaporization test device and test method of auto parts and components |
| CN110657926A (en) * | 2019-10-11 | 2020-01-07 | 安徽江淮汽车集团股份有限公司 | Device and method for detecting leakage of fuel evaporation system |
| CN111947854A (en) * | 2020-08-13 | 2020-11-17 | 安徽高坚机械科技有限公司 | Air tightness detection device for automobile fuel oil high-pressure pump |
| CN111947854B (en) * | 2020-08-13 | 2022-08-02 | 安徽高坚机械科技有限公司 | Air tightness detection device for automobile fuel oil high-pressure pump |
| CN112857821A (en) * | 2020-12-24 | 2021-05-28 | 联合汽车电子有限公司 | Failure recognition device and failure recognition method for fuel distribution pipe assembly |
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Application publication date: 20160622 |