Continuous variable valve lift apparatus

Abstract

A continuous variable valve lift apparatus may include a camshaft, a first cam disposed on the camshaft, an actuating shaft parallel to the cam shaft, an actuating lever connected to the actuating shaft, a swing arm rotatably coupled to the actuating lever and an engine, a second cam pivotally connected to the swing arm and contacting the first cam to open a valve unit and a control portion which is connected to the actuating shaft and selectively rotates the actuating shaft for pivoting center of the swing arm to move.

1 . A continuous variable valve lift apparatus for a vehicle engine comprising:
 a camshaft;   a first cam disposed on the camshaft;   an actuating shaft parallel to the camshaft;   an actuating lever connected to the actuating shaft;   a swing arm rotatably coupled to the actuating lever and pivotally mounted within a cylinder head of the engine;   a second cam pivotally connected to the swing arm and contacting the first cam to open a valve unit; and   a control portion which is connected to the actuating shaft and selectively rotates the actuating shaft to move a pivoting center of the swing arm.   
     
     
         2 . The continuous variable valve lift apparatus of  claim 1 , wherein:
 a swing arm shaft is disposed to the swing arm; and   the second cam pivots around the swing arm shaft.   
     
     
         3 . The continuous variable valve lift apparatus of  claim 1 , wherein:
 a sliding portion is formed on the actuating lever; and   the swing arm is connected to the actuating lever via a control pin which is inserted into the sliding portion and slides along the sliding portion.   
     
     
         4 . The continuous variable valve lift apparatus of  claim 3 , wherein the sliding portion is formed in a shape such that one end of the sliding potion is closer to the actuating shaft than the other end thereof. 
     
     
         5 . The continuous variable valve lift apparatus of  claim 4 , wherein the sliding portion is formed as an ellipse shape. 
     
     
         6 . The continuous variable valve lift apparatus of  claim 3 , wherein:
 a connecting pin penetrates the actuating shaft and the actuating lever for connecting the actuating shaft and the actuating lever; and   a snap ring is connected to an end of the connecting pin for the connecting pin not to be separated therefrom.   
     
     
         7 . The continuous variable valve lift apparatus of  claim 1 , wherein the second cam comprises:
 a contact portion contacting the first cam; and   a driving portion opening the valve unit.   
     
     
         8 . The continuous variable valve lift apparatus of  claim 7 , wherein a contact portion roller is disposed to the contact portion. 
     
     
         9 . The continuous variable valve lift apparatus of  claim 1 , wherein the control portion comprises:
 a worm wheel disposed to the actuating shaft;   a worm gear engaged with the worm wheel; and   a control motor driving the worm gear.   
     
     
         10 . A continuous variable valve lift apparatus for a vehicle engine comprising:
 a cam shaft;   a first cam disposed on the camshaft;   an actuating shaft parallel to the cam shaft;   an actuating lever connected to the actuating shaft;   a swing arm rotatably coupled to the actuating lever and pivotally mounted within a cylinder head of the engine;   a swing arm shaft disposed to the swing arm;   a second cam pivotally connected to the swing arm and contacting the first cam to open a valve unit; and   a control portion which is connected to the actuating shaft and selectively rotates the actuating shaft to move a pivoting center of the swing arm.   
     
     
         11 . The continuous variable valve lift apparatus of  claim 10 , wherein:
 a sliding portion is formed on the actuating lever; and   the swing arm is connected to the actuating lever via a control pin which is inserted into the sliding portion and slides along the sliding portion.   
     
     
         12 . The continuous variable valve lift apparatus of  claim 11 , wherein the sliding portion is formed in a shape such that one end of the sliding potion is closer to the actuating shaft than the other end thereof. 
     
     
         13 . The continuous variable valve lift apparatus of  claim 12 , wherein the sliding portion is formed as an ellipse shape. 
     
     
         14 . The continuous variable valve lift apparatus of  claim 10 , wherein:
 a connecting pin penetrates the actuating shaft and the actuating lever for connecting the actuating shaft and the actuating lever; and   a snap ring is connected to an end of the connecting pin for the connecting pin not to be separated therefrom.   
     
     
         15 . The continuous variable valve lift apparatus of  claim 10 , wherein the second cam comprises:
 a contact portion contacting the first cam; and   a driving portion opening the valve unit.   
     
     
         16 . The continuous variable valve lift apparatus of  claim 15 , wherein a contact portion roller is disposed to the contact portion. 
     
     
         17 . The continuous variable valve lift apparatus of  claim 10 , wherein the control portion comprises:
 a worm wheel disposed to the actuating shaft;   a worm gear engaged with the worm wheel; and   a control motor driving the worm gear.