Variable valve timing adjustable finger follower assembly

A roller finger follower assembly for an internal combustion engine having at least one valve that is opened and closed in a timed manner to port combustion gases for a combustion chamber of the internal combustion engine, the internal combustion engine having at least one cam shaft having at least one cam lobe that is rotated by the cam shaft in accordance with the operating cycle of the internal combustion engine, the cam lobe contacts the roller finger follower assembly periodically to open and close the valve, the roller finger follower assembly comprising:

• a base arm that is pivotally secured to a pivot connection, the base arm having a valve engaging finger that engages the valve at a location spaced from the pivot connection;
• a roller carriage supporting a roller that is adjustably secured to the base arm so that the roller is disposed between the pivot connection and the point at which the finger contacts the valve, the roller being positioned to contact the cam lobe as it is rotated by the cam shaft;
• and
• an adjustment link for shifting the roller carriage relative to the base arm to cause the roller to contact the lobe of the cam shaft within a range of angular positions relative to the cam shaft.

A finger follower cam assembly for an internal combustion engine having at least one valve that is opened and closed in a timed manner to port combustion gases for a combustion chamber of the internal combustion engine, the internal combustion engine having at least one cam shaft having at least one cam lobe that is rotated by the cam shaft in accordance with the operating cycle of the internal combustion engine, the cam lobe contacts the finger follower assembly periodically to open and close the valve, the finger follower assembly comprising:

• a lash pin, the lash pin having a cam portion defining a contoured surface, a first linkage connector and second linkage connector being provided on opposite ends of the lash pin, first and second linkage connectors being secured to a first linkage and a second linkage, respectively;
• an arm to which the lash pin is secured at a first end, the arm having a valve engaging finger that engages the valve at a second end of the arm opposite the lash pin, a roller mounted on the arm between the lash pin and the finger, the roller being positioned to be periodically contacted by the lobe on the cam shaft that causes the valve to open and close periodically, first and second linkages being operatively connected to the roller to adjust the position of the roller on the arm;
• and
• a lash adjuster attached to the engine and being disposed to engage the lash pin, the lash adjuster being secured to the engine and adjustable to change the point at which the elliptical surface of the lash pin contacts the lash adjuster, wherein rotation of the lash pin causes the linkages to move the roller and also changes the point at which the lash adjuster contacts the contoured surface to thereby provide a secondary lash adjustment.