论文信息 - Deterioration of gasoline vehicle emissions and effectiveness of tune-up for high-polluted vehicles

Deterioration of gasoline vehicle emissions and effectiveness of tune-up for high-polluted vehicles

This study investigates the emissions using a chassis dynamometer for three types of passenger vehicles, including new vehicles, in-use vehicles, and highly polluted vehicles, based on the US federal test procedure (FTP-75). In-use high emitters, emit about 5–12 times more CO, NOx and HC. Emission tests before and after repair and maintenance for high emitters indicated that tune-ups fail to reduce emissions because of deterioration of the three-way catalyst over time.

Yung Chen Yao | Jiun-Horng Tsai | Hung-Lung Chiang | Wen Yuan Ho

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