Abstract: An engine system having a coolant control valve may include a cylinder head including an intake side head coolant jacket for cooling an intake side thereof and an exhaust side head coolant jacket for cooling an exhaust side thereof formed in the cylinder head, a cylinder block arranged on a lower side of the cylinder head and having an intake side block coolant jacket for cooling an intake side of the cylinder block and an exhaust side block coolant jacket for cooling an exhaust side cylinder block formed therein, and a coolant control valve arranged for independently controlling coolant flowing through the intake side head coolant jacket, the exhaust side head coolant jacket, the intake side block coolant jacket and the exhaust side block coolant jacket.

Abstract: An engine system may include a first cylindrical valve in which a first outlet is formed from an interior surface to an exterior surface thereof and a second cylindrical valve inserted into the first cylindrical valve, an exterior circumference thereof sliding on the interior circumference of the first cylindrical valve, wherein a second outlet is formed to the second cylindrical valve corresponding to the first outlet, and the second cylindrical valve is separately rotatable in the first cylindrical valve, a drive portion that is engaged to the first cylindrical valve and the second cylindrical valve and disposed to respectively rotate the first cylindrical valve and the second cylindrical valve, and a control portion that controls the drive portion depending on a driving condition such that an overlapped area of the first outlet and the second outlet is controlled and coolant flowing the overlapped area is controlled.

Abstract: An engine system having a coolant control valve may include a cylinder head including an intake side head coolant jacket for cooling an intake side thereof and an exhaust side head coolant jacket for cooling an exhaust side thereof formed in the cylinder head, a cylinder block arranged on a lower side of the cylinder head and having an intake side block coolant jacket for cooling an intake side of the cylinder block and an exhaust side block coolant jacket for cooling an exhaust side cylinder block formed therein, and a coolant control valve arranged for independently controlling coolant flowing through the intake side head coolant jacket, the exhaust side head coolant jacket, the intake side block coolant jacket and the exhaust side block coolant jacket.

Abstract: An engine system may include a first cylindrical valve in which a first outlet is formed from an interior surface to an exterior surface thereof and a second cylindrical valve inserted into the first cylindrical valve, an exterior circumference thereof sliding on the interior circumference of the first cylindrical valve, wherein a second outlet is formed to the second cylindrical valve corresponding to the first outlet, and the second cylindrical valve is separately rotatable in the first cylindrical valve, a drive portion that is engaged to the first cylindrical valve and the second cylindrical valve and disposed to respectively rotate the first cylindrical valve and the second cylindrical valve, and a control portion that controls the drive portion depending on a driving condition such that an overlapped area of the first outlet and the second outlet is controlled and coolant flowing the overlapped area is controlled.

Abstract: An engine system having a control valve may include a multi flow rate control valve that circulates a coolant supplied a side of the multi flow rate control valve to at least two heat exchangers, a pressure cap that is connected to a supply line, which connects the multi flow rate control valve to the at least two heat exchangers, and is operated by a pressure that is transferred from the supply line to release the pressure or exhaust the coolant through an outlet, a reservoir tank that is mounted at one side of the pressure cap and is formed to house the coolant exhausted from the pressure cap, and a connection line that connects the outlet with the reservoir tank to release the pressure from the pressure cap or exhaust the coolant from the pressure cap.