SFI SYSTEM


  1. CONSTRUCTION


    1. The camshaft control actuator rotates the intake camshaft to the advance side or retard side, and consists of a 2-stage cycloid reduction unit which reduces the rotation speed of the cam timing control motor with EDU assembly.

    2. The rotation of the cam timing control motor with EDU assembly rotates the planetary gear via the cycloid reduction unit. By rotating the planetary gear, the intake camshaft fixed into the camshaft gear is rotated to the advance side or retard side.

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      *1 Cam Timing Control Motor with EDU Assembly *2 Signal Rotor
      *3 Sprocket Gear *4 Bearing
      *5 Eccentric Shaft *6 Large Gear
      *7 Planetary Gear *8 Small Gear
      *9 Camshaft Gear *10 Housing
      *11 Sprocket *12 Intake Camshaft
      *a Cycloid Reduction Unit - -

    3. The cycloid reduction unit consists of a sprocket gear, an eccentric shaft, a planetary gear and a camshaft gear.

    4. The eccentric shaft has a circular shape, which is eccentric in relation to the rotation axis of the camshaft, and connects with the sprocket gear.

    5. The sprocket gear has 1 tooth more than the large gear of the planetary gear, and the small gear of the planetary gear has 1 tooth less than the camshaft gear.

    6. Through the eccentric movement of the eccentric shaft, the planetary gear rotates while meshing with the sprocket gear and camshaft gear.

    7. When the eccentric shaft rotates once, the planetary gear moves while meshing with the sprocket gear, and rotates by 1 tooth only. The rotations that are decelerated by the cycloid reduction unit cause the intake camshaft to rotate.

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