Abstract
The continued rise in the number of automobiles on the roads is prompting air pollution to emerge as a serious problem due to the harmful exhaust gas emissions throughout the world. Specifically, based on the exhaust gas regulation in North America represented by PZEV, the regulation on evaporative emission, which originates from the intake manifold system when the engine is stopped, is substantially being intensified. And the technology that can meet and satisfy these regulations has been needed. This study aimed to analyze and evaluate the butane working capacity (BWC) of HC adsorption filter according to the shape of it, which was developed to reduce evaporative emission, and the effect of HC adsorption filter on the engine performance. Three kinds of HC adsorption filters for 3L gasoline engine were developed to reduce the evaporative gas emission of the intake system. The mini SHED performance tests for HC adsorption filter with honeycomb type were evaluated according to the test procedure specified by California Air Resources Board (CARB). Variations of evaporative emission gas were observed and analyzed on 1-Day diurnal test and 3-Day diurnal test including hot soak test As a result, HC adsorption filter of the plate type, which was improved compared to that of the corrugated type and also became thinner, indicates higher adsorption performance compared to the corrugated one. The adsorption performance of the honeycomb type, derived from improving the shape of plate type, is 33.5 % higher than that of the corrugated type. The amount of generated evaporative gas emission was 43 mg/test satisfy the PZEV evaporative emission standard, 54 mg/test.
Keywords: PZEV(Partial Zero Emission Vehicle), Evaporative gas, HC adsorption filter, BWC(Butane Working Capacity), Air intake system, Mini SHED