Engine system

An engine system, comprising:

• an engine including a first cylinder bank and a second cylinder bank that include a plurality of cylinders in which fuel combusts to generate a driving torque;
• a first intake manifold distributing intake air into a cylinder of the first cylinder bank among the plurality of cylinders;
• a second intake manifold distributing the intake air into a cylinder of the second cylinder bank among the plurality of cylinders;
• a first exhaust manifold collecting exhaust gas from the cylinder of the first cylinder bank and supplying the collected exhaust gas to a first exhaust line;
• a second exhaust manifold collecting exhaust gas from the cylinder of the second cylinder bank and supplying the collected exhaust gas to a second exhaust line;
• an exhaust gas cleaning device continuously connected to the first exhaust manifold through the first exhaust line and selectively connected to the second exhaust manifold through the second exhaust line, and including at least one of catalyst to clean an exhaust gas;
• a first throttle valve controlling an intake amount of the intake air supplied to cylinders of the first cylinder bank through the first intake manifold among the plurality of cylinders;
• a second throttle valve controlling an intake amount of the intake air supplied to cylinders of the second cylinder bank through the second intake manifold among the plurality of cylinders;
• a recirculation line branched from the second exhaust manifold to be coupled to the second intake manifold;
• and
• a recirculation inlet valve disposed at a point at which the recirculation line and the second exhaust line of the second exhaust manifold are joined, wherein the recirculation inlet valve is configured to selectively close the recirculation line or the second exhaust line of the second exhaust manifold,
• wherein a flow of the exhaust gas from the second exhaust manifold to the recirculation line is closed by the recirculation inlet valve in a first condition in which the recirculation inlet valve is in a first position to close the recirculation line,
• wherein a flow of the exhaust gas from the second exhaust manifold to the exhaust gas cleaning device is closed by the recirculation inlet valve in a second condition in which the recirculation inlet valve is in a second position to close the second exhaust line, and
• wherein the first condition is a status of the engine in which the plurality of cylinders is normally activated, and the second condition is a status of the engine in which a predetermined number of cylinders among the plurality of cylinders is deactivated.