Variable valve actuator assembly integrated with valve bridge

Abstract

A integrated variable valve actuator assembly of a variable valve lift apparatus may include a rocker arm rotating on a rocker shaft and including an oil supply line with selectively provided oil, a fastener penetrating the side of the rocker arm and discharging oil supplied from the oil supply line through the oil passage, a valve bridge located at the bottom of the fastener and pressurizing valves, an actuator device including an actuator piston being inserted in the valve bridge and formed with an oil supply passage, and an actuator spring being inserted in the actuator piston and providing the actuator piston with elastic force, and a variable control device located at the bottom of the actuator piston and adjusting the heights of the actuator piston by a movement generated by the hydraulic pressure of oil supplied from the oil supply passage.

1 . An integrated variable valve actuator assembly comprising:
 a rocker arm rotating on a rocker shaft and including an oil supply line formed therein for selectively supplying oil;   a fastener penetrating a side portion of the rocker arm and including an oil passage formed therein for discharging oil supplied from the oil supply line;   a valve bridge that is located at a lower end of the fastener and applies pressure on valves;   an actuator device including an actuator piston that is inserted in the valve bridge and is formed with an oil supply passage for discharging oil passing through the oil passage, and an actuator spring that is inserted in the actuator piston and exerts elastic force on the actuator piston; and   a variable control device that is located at the lower end of the actuator piston and can move by the pressure of oil supplied through the oil supply passage so as to change the position of the actuator piston.   
     
     
         2 . The integrated variable valve actuator of  claim 1 , wherein a snap ring is located on the exterior circumference of the actuator piston. 
     
     
         3 . The integrated variable valve actuator assembly of  claim 1 , wherein the valve bridge is formed with protrusions at the lower portion of the valve bridge preventing the actuator spring from bending from side to side, and supporting the actuator piston. 
     
     
         4 . The integrated variable valve actuator assembly of  claim 1 , wherein the variable control device comprises:
 a variable control piston that is inserted in an insertion hole of the variable control device formed at the lower portion of the valve bridge and contacts the lower end of the actuator piston;   a variable control spring that contacts the variable control piston and exerts elastic force on the variable control piston; and   a plate that supports the variable control spring.   
     
     
         5 . The integrated variable valve actuator assembly of  claim 4 , wherein a plurality of said variable control devices are provided. 
     
     
         6 . The integrated variable valve actuator assembly of  claim 4 , wherein the variable control piston comprises a body blocking upward or downward movements of the actuator piston and an edge restricting movements of the actuator piston. 
     
     
         7 . The integrated variable valve actuator assembly of  claim 1 , wherein the actuator piston can be positioned at multiple modes. 
     
     
         8 . The integrated variable valve actuator assembly of  claim 7 , wherein the actuator piston can be positioned at a low lift mode or at a high lift mode. 
     
     
         9 . The integrated variable valve actuator assembly of  claim 7 , wherein the displacement of the actuator piston is equal to the diameter of the body in the variable control piston.