modes respectively correspond to the activated and deactivated modes in the first mode the lifter 154 provides a mechanical connection between the cam 150 and the pushrod 146 in this manner the cam 150 induces linear motion of the lifter 154 which is transferred to the pushrod 146 in the second mode the lifter 154 functions as a buffer to provide a mechanical disconnect between the cam 150 and the pushrod 146 although the cam 150 induces linear motion of the lifter 154 the linear motion is not transferred to the pushrod 146 the solenoids 156 selectively enable hydraulic fluid flow to the lifters 154 to switch the lifters 154 between the first and second modes although there is generally one solenoid 156 associated with each select cylinder 18 u2032 i e one solenoid for two lifters it is anticipated that more or fewer solenoids 156 can be implemented each solenoid 156 actuates an associated valve 160 shown schematically between open and closed positions in the closed position the valve 160 inhibits pressurized hydraulic fluid flow to the corresponding lifters 154 in the open position the valve 160 enables pressurized fluid flow to the corresponding lifters 154 via a fluid passage 162 the pressurized hydraulic fluid flow is.