due to the eccentric relationship of the axis of rotation of the eccentric cam 18 and the axis of rotation of the rocker shaft 12 as the primary rocker 20 moves sufficiently in the first direction the roller 32 is caused to move along the curved profile 25 from the recess to the arcuate surface thereby causing no rotation of the secondary rocker 30 and preventing the rockers 26 34 from lifting from the valve tips fig1 and 2 also illustrate the system 10 including an exhaust rocker 38 positioned generally central between the first valve arm 26 and the second valve arm 34 and including an exhaust valve arm 40 the system 10 further includes an exhaust pushrod 48 in constant driving engagement with a receiving surface not shown on the exhaust rocker 38 and an exhaust arm 40 having an exhaust spring 41 mounted thereto for actuating the exhaust valve 56 lastly the system 10 includes an actuator assembly 50 in constant rotational engagement with the rocker shaft 12 for bi directionally rotating the rocker shaft 12 it should be appreciated that the actuator assembly 50 could be a generic phaser a piston lever mechanism or any other mechanical device capable of bi directionally rotating the rocker shaft it should further be appreciated that while fig1 and 2 illustrate a single piston application the system 10 could be adapted to.