Field of the Invention
The present invention relates to a hybrid intercooler system and a control method thereof, and more particularly, to a hybrid intercooler system that stabilizes a temperature of an intake air passing through an inlet of an intercooler using a water cooler, and significantly increases cooling efficiency of the intercooler using an air cooler, and a control method thereof.
Description of Related Art
Generally, a turbocharger is a supercharging structure that compresses intake air supplied to an engine with exhaust power of an exhaust gas to supply the compressed intake air to a cylinder, thereby increasing intake charging efficiency of the engine and increasing mean effective pressure to increase an output of the engine. The turbocharger has a structure in which a compressor and a turbine generally are disposed in the same axial line, the turbine is rotated by the exhaust power of the exhaust gas output through an exhaust pipe to rotate the compressor disposed in the same axial line as the turbine, to thus compress an air introduced through an intake manifold to be supplied to the cylinder.
Meanwhile, a temperature of the air compressed by the turbocharger described above is increased, therefore when the compressed air is supplied to a combustion chamber, an increase rate of air density is decreased thus causing a deterioration of a charging efficiency or knocking may easily be caused. An intercooler has been provided to decrease the temperature of the supercharged air. In particular, FIG. 1 is a view for describing an intercooler in accordance with the related art. Referring to FIG. 1, a density of an intake air cooled while passing through the intercooler is maintained to be high and a temperature thereof is decreased, thereby improving combustion power.
Generally, the intercooler is divided into an air-cooling type intercooler and a water-cooling type intercooler based on a cooling method. The air-cooling type intercooler has a structure in which the supercharged air passes through a plurality of tubes and is cooled by a cold air passing through a cooling fin integrally formed with the tubes. The water-cooling type intercool has a structure in which the air is cooled by a cooling channel contacting the tubes. In general, the air-cooling type intercooler has excellent cooling efficiency, but has a problem in that the cooling efficiency may be unstable due to a change in a temperature of the outside air, or the like. Further, the water-cooling type intercooler may maintain stable efficiency, but has a problem in that the cooling efficiency thereof is not as good as that of the air-cooling type intercooler.