Abstract: An engine system having a secondary air injection device include: an engine having a plurality of cylinders; a first intake line in which intake air supplied into the cylinder flows; a second intake line in which intake air supplied into the cylinder flows; a bypass line connecting the first intake line and the second intake line; a first electric supercharger and a second electric supercharger disposed in the first intake line and the second intake line, respectively; an exhaust manifold connected with the plurality of cylinders; an exhaust line connected with the exhaust manifold such that exhaust gas flows to the exhaust line through the exhaust manifold; an exhaust gas purification device disposed in the exhaust line; and a secondary air injection device injecting air into the exhaust manifold or the exhaust line from the intake line.

Abstract: A control method for a turbocharger system may include controlling opening levels of an intake bypass valve, an exhaust bypass valve, and a throttle valve according to a driving condition of a vehicle by a controller, and executing a series of commands by the controller, including determining whether an engine rpm satisfies a set low/medium speed condition, determining whether an acceleration request condition is satisfied when the engine rpm satisfies the set low/medium speed condition, closing the intake bypass valve, and controlling an opening angle of the exhaust bypass valve according to the acceleration request condition.

Abstract: An engine system may include: an engine including cylinders that generate a driving torque by combusting fuel; a first intake manifold connected to an intake line through which flows intake air into some of the plurality of cylinders; a second intake manifold supplying the intake air to the other cylinders of the plurality of cylinders through the first intake manifold; a first exhaust manifold connected to some cylinders that are connected to the first intake manifold; a second exhaust manifold connected to some other cylinders that are connected to the second intake manifold; a recirculation line branched from the second exhaust manifold to be coupled to the second intake manifold; a recirculation inlet valve disposed at a point at which the recirculation line and the second exhaust manifold are joined; and a manifold connection valve disposed on an intake line between the first intake manifold and the second intake manifold.

Abstract: An engine system may include an engine having an intake line flowing an intake gas supplied to the combustion chambers; an intake manifold; a throttle valve provided at a front of the intake manifold and controlling an air amount supplied to the combustion chamber; an electric supercharger provided at the throttle valve and including a motor and an electric compressor operated by the motor to supply the supercharged air to the combustion chamber; an exhaust gas processing device purifying an exhaust gas generated in the combustion chamber; and an exhaust gas recirculation device including a recirculation line branched from the downstream portion of the exhaust gas processing device and joined to the intake line of the upstream portion of the electric compressor, an EGR cooler mounted at the recirculation line, and an EGR valve mounted at a part where the recirculation line and the intake line are joined.

Abstract: An engine system may include: an engine including a first cylinder bank and a second cylinder bank; a variable valve apparatus mounted on the cylinder of the first cylinder bank to selectively deactivate the cylinder and changing operation phases of an intake valve and an exhaust valve; a main exhaust line to which a first exhaust line in which the exhaust gas from the cylinder of the first cylinder bank flows and a second exhaust line in which the exhaust gas from the cylinder of the second cylinder bank flows are joined; and a controller configured for controlling the cylinder of the first cylinder bank to be deactivated according to operation range of an engine, and the exhaust gas from the cylinder of the second cylinder bank to be re-circulated from the second exhaust line to the intake manifold through the first exhaust line and the cylinder of the first cylinder bank.

Abstract: An engine system may include an engine including first and second cylinder banks; a throttle valve; a first exhaust manifold gathering exhaust gas exhausted from the first cylinder bank to be supplied to the first exhaust line; a second exhaust manifold gathering exhaust gas exhausted from the second cylinder bank to be supplied to the second exhaust line; a turbocharger including a turbine rotated by the exhaust gas exhausted through the first exhaust manifold and a compressor rotated in connection with the turbine; a cylinder deactivation (CDA) device selectively deactivating the cylinders of the first cylinder bank; and a supercharger including a motor and an electric compressor operated by the motor.

Abstract: An engine system for removing condensed water may comprise an engine including a plurality of combustion chambers generating driving torque by combustion of fuel; an intake line, in which fresh air flows into the combustion chambers; an exhaust line, in which exhaust gas flows, having been exhausted from the combustion chambers; and an intercooler for cooling compressed air by a compressor of a turbocharger, the intercooler having a coolant circulation line in which coolant flows for cooling the engine.

Abstract: An engine system may include: an engine including a plurality of cylinders generating driving torque by combustion of fuel; a first exhaust manifold connected to some of cylinders of the plurality of cylinders; a second exhaust manifold connected to remaining cylinders of the plurality of cylinders; a turbocharger including a turbine rotated by exhaust gas that is exhausted from the first exhaust manifold and a compressor rotated together with the turbine and compressing air supplied to the cylinders; and an supercharger including a motor and an compressor operated by the motor in order to supply compressed air to the cylinders.

Abstract: An engine system may include an engine, an intake line, a cylinder deactivation (CDA) device mounted at a portion of combustion chambers, a first exhaust manifold connected to combustion chambers mounted with the CDA device, a second exhaust manifold connected to combustion chambers without the CDA device, a first exhaust line flowing exhaust gas exhausted from the first exhaust manifold, a second exhaust line flowing exhaust gas exhausted from the second exhaust manifold, a main exhaust line to which the first exhaust line and the second exhaust line are joined, an exhaust gas processing device at which the main exhaust line is installed, a turbocharger mounted at the first exhaust line, an electric supercharger installed at the intake line to supply supercharged air to the combustion chamber and an electric compressor, and an air injection device supplying the fresh air to the second exhaust manifold or the second exhaust line.

Abstract: A control apparatus of an engine having a turbocharger may include the engine generating power by combustion of a fuel, the turbocharger including a turbine operated by exhaust gas of the engine and a compressor connected to the turbine by a rotating shaft, and thus supercharging air to a combustion chamber provided in the engine by the compressor, a detecting sensor detecting pre-ignition in the combustion chamber of the engine, and a controller controlling supercharging pressure supplied to the combustion chamber by using a required torque, ignition timing of the combustion chamber, and an air-fuel ratio, and thus controlling the pre-ignition in the combustion chamber, when the pre-ignition in the combustion chamber may be detected by the detecting sensor.

Abstract: An engine system may include an engine including first and second cylinder banks; a throttle valve; a first exhaust manifold gathering exhaust gas exhausted from the first cylinder bank to be supplied to the first exhaust line; a second exhaust manifold gathering exhaust gas exhausted from the second cylinder bank to be supplied to the second exhaust line; a turbocharger including a turbine rotated by the exhaust gas exhausted through the first exhaust manifold and a compressor rotated in connection with the turbine; a cylinder deactivation (CDA) device selectively deactivating the cylinders of the first cylinder bank; and a supercharger including a motor and an electric compressor operated by the motor.

Abstract: A method for controlling an exhaust gas recirculation (EGR) system which is provided with an intake throttle valve and an EGR valve driven by a motor may include detecting an engine speed and an amount of intake air for each cylinder of an engine while the engine is operating, determining an amount of air flow supplied to the engine based on the engine speed and the amount of intake air for each cylinder, determining an equivalent cross-section of the EGR valve based on the amount of air flow, determining an opening angle of the EGR valve based on the engine speed, the amount of intake air for each cylinder, the amount of air flow, and the equivalent cross-section of the EGR valve, and controlling the EGR valve according to the opening angle of the EGR valve.

Abstract: An engine system may include an engine having an intake line flowing an intake gas supplied to the combustion chambers; an intake manifold; a throttle valve provided at a front of the intake manifold and controlling an air amount supplied to the combustion chamber; an electric supercharger provided at the throttle valve and including a motor and an electric compressor operated by the motor to supply the supercharged air to the combustion chamber; an exhaust gas processing device purifying an exhaust gas generated in the combustion chamber; and an exhaust gas recirculation device including a recirculation line branched from the downstream portion of the exhaust gas processing device and joined to the intake line of the upstream portion of the electric compressor, an EGR cooler mounted at the recirculation line, and an EGR valve mounted at a part where the recirculation line and the intake line are joined.

Abstract: A method of controlling an electric continuous variable valve timing apparatus improves starting performance of an engine by a simplified phase control for the camshaft. The method, in which intake and exhaust timing of an engine is changed in accordance with a phase of the camshaft, may include: determining whether starting off of the engine is required during driving; recognizing a target phase of the camshaft for next starting of the engine; controlling the phase of the camshaft so that the intake timing of the engine is advanced in accordance with the target phase; and ending the phase control of the camshaft in accordance with a state of the engine or the camshaft.

Abstract: An apparatus for controlling an engine having a variable valve actuator include: an engine including a plurality of cylinders generating a driving torque by burning fuel, an intake valve selectively opened for supplying air and the fuel to the cylinders through an intake manifold, and an exhaust valve selectively opened for exhausting exhaust gas generated from the cylinders to an exhaust manifold; a variable valve actuator disposed in at least one cylinder of the plurality of cylinders and adjusting lift and duration of the intake valve or the exhaust valve; and a controller deactivating the at least one cylinder of the plurality of cylinders through the variable valve actuator according to a driving region of the engine, and recirculating the exhaust gas exhausted from the cylinders into the intake manifold through the deactivated cylinder.

Abstract: An engine cooling system may include a main intake line for supplying external air to an intake manifold attached to an engine including a cylinder block and a cylinder head, a supplementary intake line branched from one side of the main intake line and joined to the other side of the main intake line, an intake route control valve in the main intake line, a main exhaust line for flowing exhaust gas from an exhaust manifold, an exhaust route control valve in the main exhaust line, a turbocharger, an intercooler mounted to the supplementary intake line on a downstream side of the turbocharger, an EGR cooler branched from the exhaust manifold for recirculating the exhaust gas and provided in an EGR line connected to the main intake line; and a cooling line for flowing a coolant supplied from a water pump to cool the EGR cooler, the exhaust route control valve and/or the turbine housing of the turbocharger.

Abstract: An engine having a low pressure EGR system includes: an intake line suctioning outdoor air and transferring the outdoor air to a combustion chamber; a turbocharger actuated by exhaust gas which flows in an exhaust line to compress gas which flows in the intake line; a supercharger installed at a downstream side of the turbocharger; a low pressure EGR line branched at one side of the exhaust line and joined to an upstream side of the turbocharger to recirculate the exhaust gas; a recirculation line branched on the intake line at a downstream side of the supercharger and joined to the intake line at an upstream side of a point where the low EGR line and the intake line meet; and a control unit controlling the actuation of the supercharger. The control unit actuates the supercharger in the case of a coasting driving condition.

Abstract: An control apparatus and method for an engine having a turbocharger may include determining a load condition of the engine by a controller, and opening and closing an intake valve, a throttle valve, and a wastegate valve by the controller according to the load condition of the engine, where a combustion chamber generates power by combusting a fuel, an intake valve adjusts an air/fuel mixed gas flowed into the combustion chamber, a continuously variable valve timing apparatus advances or retards an opening/closing timing of the intake valve, a turbocharger having a turbine and a compressor compressing air flowed into the combustion chamber, a throttle valve adjusting air supplied to the combustion chamber, a wastegate valve adjusting the exhaust gas flowed into the turbine, and a controller controlling the intake valve, the throttle valve, and the wastegate valve according to a load region of the engine.

Abstract: An engine system may include a first intake line configured to supply external air to an intake manifold mounted in a cylinder block of an engine, an intake bypass valve disposed on the first intake line, a second intake line configured to bypass the intake bypass valve, a first exhaust line, through which exhaust gas discharged from an exhaust manifold mounted in the cylinder block flows, an exhaust bypass valve disposed on the first exhaust line, a second exhaust line configured to bypass the exhaust bypass valve, a turbo charger operated by exhaust gas passing through the second exhaust line, and configured to pump intake air flowing in the second intake line, a controller configured to control the intake bypass valve and the exhaust bypass valve, and a turbine housing configured to surround a turbine of the turbo charger. The turbine housing may be made of a material the same as that of a cylinder head of the engine.

Abstract: An engine having a low pressure EGR system includes: an intake line suctioning outdoor air and transferring the outdoor air to a combustion chamber; a turbocharger actuated by exhaust gas which flows in an exhaust line to compress gas which flows in the intake line; a supercharger installed at a downstream side of the turbocharger; a low pressure EGR line branched at one side of the exhaust line and joined to an upstream side of the turbocharger to recirculate the exhaust gas; a recirculation line branched on the intake line at a downstream side of the supercharger and joined to the intake line at an upstream side of a point where the low EGR line and the intake line meet; and a control unit controlling the actuation of the supercharger. The control unit actuates the supercharger in the case of a coasting driving condition.