Engine system

An engine system, comprising:

• an engine including a combustion chamber generating driving force by combustion of fuel therein;
• an intake line through which outside air supplied to the combustion chamber flows;
• an exhaust line through which exhaust gas discharged from the combustion chamber flows;
• a turbocharger including a turbine rotating by the exhaust gas discharged from the combustion chamber and a compressor rotating in conjunction with the turbine and compressing the outside air;
• an exhaust gas recirculation device including an exhaust gas recirculation (EGR) line branched from the exhaust line and joining the intake line, an EGR cooler provided in the EGR line, and an EGR valve provided in the EGR line;
• an intercooler provided in the intake line downstream of the compressor and configured to cool the outside air compressed by the compressor and a recirculation gas recirculated by the exhaust gas recirculation device;
• a bypass line branched from the intake line upstream of the intercooler and joining the intake line downstream of the intercooler;
• a condensed water separation line branched from the intake line upstream of the intercooler and joining the intake line upstream of the intercooler;
• a condensed water separation module provided in the condensed water separation line and configured to separate condensed water contained in a mixture flowing through the condensed water separation line;
• and
• a four-way valve provided in the intake line between the compressor and the intercooler, and selectively operated so that the mixture of the outside air and the recirculation gas introduced to the upstream of the intercooler passes through the intercooler, flows through the bypass line, or flows through the condensed water separation line.