Test method and test device of emission of methanol automobile exhaust contaminant

Abstract

The invention relates to a test method and a test device of the emission of methanol automobile exhaust contaminant. The method comprises the following steps: setting parameters of a methanal samplingpump, then operating a methanol test automobile on a chassis dynamometer, collecting methanal automobile exhaust in the cycle operation process, continuously diluting and mixing collected exhaust byusing air, and sampling and analyzing methanal exhaust contaminant after the cycle operation of the methanol test automobile is finished; separating by a chromatographic column and measuring by a highperformance liquid chromatograph, thereby analyzing and calculating the concentration of the absorbed methanal and calculating the emission quality of the methanal contaminant by adopting a formula:M[HCHO]=V[mix]*C[HCHO] / d. The invention mainly provides the test method and the test device which can realize that the content of conventional contaminants of carbon monoxide (CO), hydrocarbon (HC), nitric oxide (NOX) and particulate matter (PM) as well as the content of unconventional exhaust contaminant methanal (HCHO) can be collected and analyzed simultaneously and the emission concentration of the methanol automobile exhaust can be accurately tested during a test circulation, and solves the technical problem that the emission concentration of the methanal in the automotive exhaust can notbe accurately tested and quantitatively evaluated.

Description

technical field [0001] The invention relates to a method and a device for testing the emission of exhaust pollutants from automobiles, in particular to a method and a device for testing the emission of exhaust pollutants from methanol automobiles. Background technique [0002] At present, countries around the world are increasingly aware of environmental protection, and the restrictions on pollutants emitted by vehicles are becoming more and more stringent. Especially with the development and use of some new energy vehicles such as gas vehicles, alcohol ether vehicles, and biomass fuel vehicles, people no longer only pay attention to the conventional exhaust pollutants of vehicles, such as carbon monoxide (CO), carbon dioxide (CO 2 ), hydrocarbons (HC), nitrogen oxides (NO X ) and particulate matter (PM) emissions, and at the same time began to explore and study unconventional emissions from vehicles, such as formaldehyde emissions. [0003] Now there is a Chinese patent a...

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Problems solved by technology

[0004] The present invention mainly provides a method that can simultaneously collect and analyze carbon monoxide (CO), hydrocarbons (HC), and nitrogen oxides (NO) emitted from automobile exhaust in the same test cycle process. X ) and particulate matter (PM) conventional pollutant content and formaldehyde (HCHO) non-conventional emission pollutant content, can accurately detect the test method and device of methanol automobile exhaust emission concentration; solve the problem of formaldehyde in automobile exhaust existing in the prior art The technical problem that the emission concentration cannot be accurately detected and quantitatively evaluated

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