Piston oil jet apparatus of engine

Abstract

A piston oil jet apparatus of an engine includes a control valve guide installed inside a cylinder block which includes a cylinder in which a piston is lifted and including an oil inlet provided at one side and oil supply holes controlling oil supply at another side. A control valve is coupled to the control valve guide and opens/closes the oil supply holes. A piston cooling jet is connected to the oil supply holes to inject a cooling oil toward the piston. An actuator moves the control valve.

What is claimed is: 
     
         1 . A piston oil jet apparatus of an engine comprising:
 a control valve guide installed in a cylinder block which includes a cylinder in which a piston is lifted, the control valve guide including an oil inlet formed at one side thereof and oil supply holes which control cooling oil supply at another side thereof;   a control valve coupled to the control valve guide and opening or closing the oil supply holes;   a piston cooling jet connected to the oil supply holes to inject a cooling oil toward the piston; and   an actuator moving the control valve.   
     
     
         2 . The piston oil jet apparatus of  claim 1 , wherein
 the control valve is inserted into the control valve guide to open or close the oil supply holes.   
     
     
         3 . The piston oil jet apparatus of  claim 2 , wherein
 the actuator is an electric motor which rotates the control valve to open or close the oil supply holes.   
     
     
         4 . The piston oil jet apparatus of  claim 2 , wherein the control valve guide has a circular pipe shape, and
 wherein the control valve contacts an interior circumference of the circular pipe having a curved surface to open or close the oil supply holes in a forward rotation and a reverse rotation.   
     
     
         5 . The piston oil jet apparatus of  claim 4 , wherein the cylinder is provided in plural, and
 wherein the control valve guide has the oil supply holes respectively corresponding to each cylinder.   
     
     
         6 . The piston oil jet apparatus of  claim 5 , wherein the control valve includes opening/closing members corresponding to the respective oil supply holes, and
 a rotation shaft connected to and rotating the opening/closing members.   
     
     
         7 . The piston oil jet apparatus of  claim 6 , wherein
 the opening/closing members are have a semicircular shape corresponding to the circular interior circumference of the control valve guide and connected to the rotation shaft disposed at a center of the control valve guide by a connecting member.   
     
     
         8 . The piston oil jet apparatus of  claim 6 , wherein
 the oil supply holes are formed on the same side in a diameter direction of the control valve guide.   
     
     
         9 . The piston oil jet apparatus of  claim 4 , wherein the control valve guide further includes bearings attached to both ends thereof, and
 wherein the control valve is supported by the bearings.