Patent ID: 6487997
Filing Date: 2002-12-03
Classification: F01L

Abstract:
A springless poppet valve system comprising:a poppet valve movable between an open position and a closed position, an open cam, a close cam, an open rocker arm having an open cam follower disposed to engage the open cam at an open cam engage point and being operatively connected to the poppet valve at an open valve engage point so as to move the valve from the closed position to the open position when a high lift portion of the open cam engages the open cam follower, a close rocker arm having a close cam follower disposed to engage the close cam at a close cam engage point, and being operatively connected to the poppet valve at a close valve engage point so as to move the valve from the open position to the close position when a high lift portion of the close cam engages the close cam follower, an open hydraulic lifter pivotally connected to the open rocker arm so as to define an open rocker arm fulcrum point and operable to hold the open rocker arm in operative connection with the poppet valve, and a close hydraulic lifter pivotally connected to the close rocker arm so as to define a close rocker arm fulcrum point and operable to hold the close rocker arm in operative connection with the poppet valve, wherein the open rocker arm fulcrum point is disposed between the open cam engage point and the open valve engage point and the close rocker arm fulcrum point is disposed between the close cam engage point and the close valve engage point.