Engine system

摘要

According to an embodiment of the present invention, an engine system includes: an engine having an exhaust pipe and a suction pipe; a turbo charger having a compressor and a turbine; a scavenging bypass line connected between the exhaust pipe and the suction pipe; a humidifier humidifying scavenging gas; an air cooler cooling the scavenging gas; an EGR damper controlling the pressure of exhaust gas; an EGR line connected to the suction pipe; an EGR valve controlling the flow rate of the exhaust gas (EGR gas); a leed valve arranged in the lower side of the EGR valve; and an EGR cooler cooling the EGR gas. According to the present invention, the engine system to decrease the temperature of combustion gas inside a cylinder in order to reduce nitrogen oxides and to prevent the surge generation to prevent a decrease in efficiency of the engine.