earticle

영어

Thermal efficiency of diesel engine is higher than that of gasoline engine. But diesel engine requires more strict environmental regulations, due to the pollution. Vehicle manufacturers continue to develope the more efficient devices, reducing detrimental emission gas. EGR system reduces diesel engine NOx and widely used. However, while technological development and improvement of the technology of the exhaust gas abatement device has been made, the side effect increases the vehicle fire. Recent outbreak of fire in a manufacturer's diesel vehicles has surged, and many experts have pointed out that the cause of the fire is a defect in the EGR system and the ignition of carbon sludge attached to the intake system. The structure and the operating principle of EGR system, which is pointed out as the cause of the fire, are investigated and also, the possibility of the fire by the fire recurrence experiment of the carbon sludge is analysed.