On implementing this plan, till the end of the year, 1206 vehicles were tested. There were 1155 vehicles passed from the smoke emission tests. Whereas 51 vehicles, which represents 4.2% of the tested vehicles, were failed. There were 350 vehicles were performed on-road free accelerating smoke testing. It was found that 16.3% of the tested vehicles were failed. This percentage is about 4 times higher than that was tested in the smoke testing station. On performing visual smoke discriminating, 1582 vehicles were reported to be doubtfully emitted more smoke than the exhaust regulations. Among these vehicles, 523 vehicles, which were registered in Chia-Yi city, were recalled to take full load smoke examination in the station. It was found that, there were 42 vehicles failed from the tests. In this project, 197 diesel samples were taken directly from on-road vehicle fuel tanks for sulfur content analysis. 41 out from these fuel samples, about one fifth, were found to be unqualified with sulfur content. However, the unqualified rate for the fuels sampled from smoke testing station or user’s parking areas were found to be only 9.5 %. To propagate the concept of diesel smoke emissions reduction and to publicize there test sequences and procedures, 2000 relevant documents were prepared and distributed to drivers and the car owners. Technical seminar and discussion meetings were held to give open communicating opportunities to the publics.

Diesel powered vehicle smoke testing,Fuel quality monitoring program