2.5톤 노후 디젤트럭의 NGV화에 따른 기관성능 및 배기특성

Heavy duty diesel vehicles are the worst polluters of our environment, although it make up only few percent of all vehicles on the road, because it emit a lot of emission, especially particulate matter (PM). Pollution-control measures of old model year's vehicles are more urgent, because it were regulated by lower emissions standards and engine performances were deteriorated. Therefore, we have studied the retrofit technology of 2.5ton superannuated diesel truk to CNG truk and the optimization technology of engine performances for a low emission. Test results showed that the torque and the power with CNG were almost same as those of pure diesel oil. Also, NOx and CO after catalytic converter was very low. But the THC after catalytic converter was decreased a little compared to before catalytic converter.