Evaluation of Uncertainty in Measurement of N2O Specific Emissions from Diesel Engines
Select a diesel engine that meets the National VI emission standard and perform five World Harmonized Transient Cycles(WHTC)and five World Harmonized Steady State Cycles(WHSC)on the test bench to measure the specific emissions of N2 O pollu-tants,establish a mathematical model,and evaluate measurement uncertainty through theoretical methods.The results indicate that the repeatability of engine measurement has a significant impact on the uncertainty of N2 O pollutant emissions.Therefore,a standardized pre-treatment process to ensure the stability of engine and exhaust gas treatment operation is particularly important for accurately meas-uring N2 O pollutant emissions according to unified standards.
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