Bypass apparatus of oil-cooler and controlling method thereof

Abstract

A bypass apparatus of an oil cooler is provided that includes an oil pump that is configured to supply oil in an oil pan to an engine through an oil cooler and an oil filter. In addition, a solenoid valve is connected to front and rear ends of the oil cooler and is configured to change a circulation path of oil by being opened or closed by a controller.

What is claimed is: 
     
         1 . A bypass apparatus of an oil cooler, comprising:
 an oil pump configured to supply oil in an oil pan to an engine through an oil cooler and an oil filter; and   a solenoid valve connected to front and rear ends of the oil cooler and configured to change a circulation path of oil by being opened or closed by a controller.   
     
     
         2 . The apparatus of  claim 1 , wherein the controller is configured to open the solenoid valve to supply oil to the engine without passing through the oil cooler, when the engine accelerates. 
     
     
         3 . The apparatus of  claim 1 , wherein the controller is configured to close the solenoid valve to supply oil to the engine through the oil cooler, when the engine decelerates. 
     
     
         4 . The apparatus of  claim 1 , wherein the controller is configured to open the solenoid valve to supply oil to the engine without passing through the oil cooler, when the engine is maintained at a predetermined speed and driving torque is to be reduced. 
     
     
         5 . The apparatus of  claim 1 , wherein the controller is configured to close the solenoid valve to supply oil to the engine through the oil cooler, when the engine is maintained at a predetermined speed and oil temperature is to be increased. 
     
     
         6 . A method of controlling a bypass apparatus of an oil cooler of  claim 1 , comprising:
 detecting, by the controller, whether a speed of a running vehicle has changed;   detecting, by the controller, whether a vehicle is being accelerated, when a speed change is detected; and   bypassing, by the controller, the oil cooler by opening a solenoid valve of the bypass apparatus, when acceleration is determined.   
     
     
         7 . The method of  claim 6 , wherein when a speed change is not detected and it is determined that driving torque is to be reduced, the bypassing of the oil cooler is performed, by the controller, by opening the solenoid valve. 
     
     
         8 . The method of  claim 6 , wherein when a speed change is not detected and it is determined that oil temperature is to be increased, the solenoid valve is closed by the controller. 
     
     
         9 . The method of  claim 6 , wherein in response to determining that an engine decelerates the solenoid valve is closed by the controller.