Emission Analysis of Motorcycle ECE Driving Pattern Test and Dissussion on the Screen Criteria of Motorcycle I/M Data

• Main Authors: Ming-Sian He, 何明憲
• Other Authors: 盧昭暉
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/54472075357691352033

碩士 === 國立中興大學 === 機械工程學系所 === 101 === This paper is to investigate the effect of malfunction of components in motorcycle emission control system on the exhaust emission in the driving cycle test and the air fuel ratio variations. It was found that the adjustment of the idling setting can alter the emission in the driving cycle test. Components malfunction may cause increase in emission. Among the malfunctions that have been tested in this paper, the cylinder head temperature sensor and the exhaust oxygen sensor have the most serious effects. As for the generation of emission in the whole testing cycle, it was found that constant speed period has the highest contribution. In addition to that, it was also found that a good relationship exists between the idling emission and the emission of the whole driving cycle test. Because motorcycle is one of the major emission sources in metropolitan area, an emissiom regulation measure is required. I/M test is the way to regulate in used motorcycle. In order to control the quality of testing data, a set of standard is used to screen the improper data. One of the standards is CO2+CO<8%. The effectiveness of this standard was investigated in this paper. It was found that this standard works well to screen out many improper data. However, some improper data may slip out. A complementary standard was proposed in this study in which HC is included. It was also found that the choice of connecting tube in the emission test also plays an important role to determine the final testing value. A loose connector would cause leakage of air into sampling tube and that in turn would result in a higher value of air fuel ratio and lower values of emission data. The depth to insert sampling prob is also important. If the depth is less that 10 cm, the sample will be diluted.