Small-size closed chamber for measuring evaporative emission of fuel of motorcycle

Abstract

The invention discloses a small-size closed chamber for measuring evaporative emission of fuel of a motorcycle.The small-size closed chamber comprises a closed chamber box body, gas collection bags, a temperature control device, a hydrogen flame ionization type hydrocarbon analyzer, a pressure adjusting device, a circulation air duct, a fuel tank heating system, a rack and a control platform; a suspended ceiling is arranged at the ceiling of the closed chamber box body, and the gas collection bags are placed on the suspended ceiling; the closed chamber box body is a cubic box body, the circulation air duct and the temperature control device are fixed to the back side of the closed chamber box body, and circulating fans are mounted in the circulation air duct.The closed chamber is good in air-tightness, accurate in measured data and good in test reproducibility.Meanwhile, the closed chamber fully takes particularity of a measured object and price acceptable to domestic enterprises into consideration, on the premise that relevant test laws and regulations are met, independent design and development are conducted, equipment cost is greatly lowered, the engineering purpose of miniaturizing a fuel evaporation closed chamber is achieved, and the closed chamber can meet requirements of national standards.

Description

technical field [0001] The invention relates to an airtight chamber, in particular to a small airtight chamber used for measuring the evaporative emission of motorcycle fuel. Background technique [0002] There are three main emission sources of motor vehicles polluting the environment: exhaust emissions, crankcase blow-by and fuel evaporation. Among them, exhaust emissions and crankcase blow-by have attracted the attention of motorcycle manufacturers and have taken corresponding control measures, but motorcycle fuel evaporation Emissions have not attracted enough attention. At present, only a few countries and regions in the world have implemented motorcycle fuel evaporative emission regulations. In 2007, my country also promulgated and implemented the "Motorcycle and Moped Fuel Evaporative Pollutant Emission Limits and Measurement Methods" standard. [0003] Fuel evaporative emissions from motor vehicles are one of the sources of HC pollutants in the atmosphere. Studying...

AI Technical Summary

Problems solved by technology

This method has relatively simple equipment and low purchase cost, but the test is not accurate, has large deviation, poor reproducibility and consistency, etc.

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