G501 管内の脈動流れと温度分布の関係(GS5-1 内部流,一般セッション)

抄録

In recent years, the number of cars and motorcycles has increased around the world and now reached more than a billion. The environmental pollution is caused by the emission from automobiles, being critical problem. As one of the countermeasures, higher and higher level standards of emissions have been defined in developed countries. Catalytic converters are one of the most important parts of vehicles' emissions control system, its operating temperature being very high. Vehicles emit most of their pollution during the first a few minutes of engine operation before the catalytic converter has warmed up sufficiently to be effective. Therefore, this study focuses on heating the converter up to the operating temperature, using wave phenomena formed in the exhaust pipe. As a result, the temperature and the pressure oscillation in the converter were measured with respect to the revolution of engine and these data Were compared with each other. The intensity of pressure wave in converter was found to be related to the temperature rises.