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Passenger vehicle PM test system and method

A test method and technology for passenger vehicles, applied in the field of in-vehicle environmental health and environmental protection, can solve problems such as inapplicability, difficulty in complete vehicle, aerosol protection and filtration testing, etc., to achieve difficult adsorption, increase reliability, improve efficiency and The effect of accuracy

Active Publication Date: 2020-09-01
CHINA AUTOMOTIVE ENG RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a PM test method for a passenger car, which solves the problem of the existing method for testing particulate matter, which is not suitable for aerosol particles with smaller diameters, and it is difficult to carry out effective aerosol protection and filtration tests on the whole vehicle. technical issues

Method used

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  • Passenger vehicle PM test system and method

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Effect test

Embodiment 1

[0055] An embodiment of the PM test method of a passenger car vehicle according to the present invention is basically as attached figure 1 Shown: Including steps: S1. Pretreatment: make the temperature and humidity of the environmental chamber and the concentration of PM2.5 in the vehicle meet the preset requirements; S2. Airtightness test: evaluate the airtightness of the whole vehicle by increasing the concentration of PM2.5 in the car ; S3, total purification efficiency test: calculate the total purification efficiency; S4, natural sedimentation rate test: calculate the natural sedimentation rate; S5, calculation of internal circulation purification efficiency: internal circulation purification efficiency = total purification efficiency - natural sedimentation rate.

[0056] In this embodiment, a NaCl aerosol generating device is used as the source of particle pollution. The NaCl aerosol particles produced by the device have a particle mass median diameter of 0.6um, which ca...

Embodiment 2

[0073] The only difference from Example 1 is that the particulate matter simulation generating device uses cigarette smoke as the simulated dust source of particulate matter pollution, uses an automatic cigarette lighter to send the smoke into the environmental chamber through positive pressure, and the particle size distribution of the cigarette smoke is 0.1-0.75um. The particle dust source is introduced into the environmental cabin, and through the air mixing and circulation system of the environmental cabin, a relatively stable particulate pollution environment is created. The particle concentration change in the vehicle is tested within 0.5 hours. Through data calculation, the barrier and protection performance of the vehicle to particulate matter is investigated. The particle flow rate of the cigarette smoke generator is generally 1-5L / min. Due to the fast combustion speed, it is suitable for producing particle pollution concentrations in a large environment; and the partic...

Embodiment 3

[0075] The only difference from Embodiment 1 is that in this embodiment, the aerosol is formed by the smoke smoked by the driver, who sits in the driving seat. In the process of smoking, the generation of aerosol can be divided into two parts: first, the smoke that the driver spits out when he smokes; second, the smoke that diffuses from the natural combustion of the cigarette when the driver does not smoke. Therefore, in the test environment in this implementation, in order to ensure that the test results are closer to the actual situation, it is necessary to make corresponding corrections to the particle generation process.

[0076] In this implementation, the driver sits in the driving position and smokes. When he takes a puff of cigarette, he spits out the smoke and puts the burning cigarette in the ashtray on the right hand side; Cigarettes in the ashtray on the right hand side, cycle through. In order to properly simplify the test process, it can be considered that ther...

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Abstract

The invention relates to the field of environmental health and environmental protection in a vehicle, in particular to a passenger vehicle PM test method. The method comprises the following steps: S1,performing preprocessing: enabling the temperature and humidity of an environmental cabin and the PM2.5 concentration in a vehicle to meet preset requirements; S2, carrying out leakproofness testing;to be specific, evaluating the leakproofness of the whole vehicle through increment of the PM2.5 concentration in the vehicle; S3, testing the total purification efficiency: calculating the total purification efficiency; S4, testing a natural sedimentation rate: calculating the natural sedimentation rate; and S5, calculating the internal circulation purification efficiency; enabling the internalcirculation purification efficiency to be equal to a result of subtracting the natural sedimentation rate from the total purification efficiency and. Therefore, technical problems that an existing method for testing particulate matter is not suitable for aerosol particles with smaller diameters, and aerosol effective protection and filtering testing are difficult to carry out on a whole vehicle are effectively solved.

Description

technical field [0001] The invention relates to the field of environmental health and environmental protection in vehicles, in particular to a PM testing system and method for a passenger vehicle. Background technique [0002] Particulate matter, also known as PM, refers to various solid or liquid particles uniformly dispersed in an aerosol system. Studies have shown that there are significant differences in the composition of particulate matter emitted by different types of motor vehicles, but the most abundant components are OC (organic carbon) and EC (elemental carbon). The content of OC in the particulate matter emitted by gasoline vehicles is the highest, followed by EC; the content of EC in the particulate matter emitted by diesel vehicles is the highest, followed by OC. Hydrocarbons are the main components of OC, such as alkanes, alkenes, aromatic hydrocarbons and polycyclic aromatic hydrocarbons, in addition to nitrosamines, nitrogen heterocycles, cyclic ketones, qu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M17/007G01N15/04G01N15/06
CPCG01M17/007G01N15/04G01N15/06G01N15/075
Inventor 何海峰宫宝利雷剑梅江楠游刚李琦艾森林赵军霞许凯羿韩松刘丹凤王笠力
Owner CHINA AUTOMOTIVE ENG RES INST
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