Rotation control apparatus of cvvt

Abstract

The present disclosure provides generally for a rotation control apparatus of a CVVT (Continuous Variable Valve Timing) that includes an advanced-angle compensating unit. This unit may be disposed at a rotor to always apply torque in an advancing direction of the rotor between the rotor and a stator. This unit may achieve self-locking of a lock pin to provide rotational control of a CVVT.

What is claimed is: 
     
         1 . A rotation control apparatus of a Continuous Variable Valve Timing (CVVT), the apparatus comprising:
 a stator;   a rotor positioned for rotation relative to the stator and having an advancing direction and a lock pin;   an advanced-angle compensating unit disposed at the rotor and having a side, the advanced-angle compensating unit operable to apply torque in the advancing direction of the rotor between the rotor and the stator, the advanced-angle compensating unit operable to achieve self-locking of the lock pin; and   a stopper locking the side of the advanced-angle compensating unit and releasing the advanced-angle compensating unit after the advanced-angle compensating unit reaches a predetermined position.   
     
     
         2 . The apparatus of  claim 1 , wherein the advanced-angle compensating unit is a bias spring. 
     
     
         3 . The apparatus of  claim 1 , wherein the advanced-angle compensating unit has a first end connected to the rotor. 
     
     
         4 . The apparatus of  claim 1 , wherein the advanced-angle compensating unit has a second end connected to the stator. 
     
     
         5 . The apparatus of  claim 3 , wherein the stopper is inserted in the rotor at the first end of the advanced-angle compensating unit. 
     
     
         6 . The apparatus of  claim 3 , wherein the rotor comprises a rotational groove forming a predetermined range such that the first end of the advanced-angle compensating unit rotates within the predetermined range. 
     
     
         7 . The apparatus of  claim 1  wherein the advanced-angle compensating unit has a first end connected to the rotor and a second end connected to the stator, the stopper being inserted in the rotor at the first end of the advanced-angle compensating unit, the rotor comprising a rotational groove forming a predetermined range such that the first end of the advanced-angle compensating unit rotates within the predetermined range. 
     
     
         8 . The apparatus of  claim 1  further comprising a solenoid valve to perform locking, and the rotor having a retarding direction. 
     
     
         9 . The apparatus of  claim 8 , wherein the advanced-angle compensating unit is compressed when the rotor rotates in the retarding direction, and the advanced-angle compensating unit increases torque of the rotor with a compressive force when the rotor rotates in the advancing direction, and
 the locking pin is continuously locked by the solenoid valve when the rotor rotates in the advancing direction.   
     
     
         10 . The apparatus of  claim 9  wherein the locking pin is automatically locked. 
     
     
         11 . The apparatus of  claim 1 , wherein the advanced-angle compensating unit always applies torque in the advancing direction of the rotor. 
     
     
         12 . The apparatus of  claim 1 , wherein the advanced-angle compensating unit continuously applies torque in the advancing direction of the rotor.