Cylinder de-activator system

Claim 1

A cylinder de-activator system for an internal combustion engine comprising: a block and an engine head, a plurality of engine cylinders in said block, intake and exhaust valves for each engine cylinder spring loaded to their closed positions, a cam operated valve train operating each said valve, said valve train comprising a rocker lever that has an aperture in its midsection that allows the rocker lever to be rockingly connected to a first mounting stud extending upwardly from said engine head, one end of said rocker lever presses against a coil spring that normally keeps said valve closed and the other end of said rocker lever receives the top of a push rod, hydraulic means for varying the fulcrum position on said first mounting studs about which said rocker lever rocks, said hydraulic means comprising a tubular sleeve having said first mounting stud extending upwardly within, the top of said tubular sleeve having a pressure force transfer surface, a hydraulic cylinder having integral lateral walls that stretch continuously all the way from the bottom of said hydraulic cylinder to its top, the hydraulic cylinder has a top wall that closes that end of the cylinder, a piston is reciprocally mounted within said hydraulic cylinder and it forms a sealed chamber between its top surface and the interior of said hydraulic cylinder, the hydraulic cylinder has a bottom wall that closes that end of the cylinder, said bottom wall having a plurality of bores passing through it into which a plurality of force transfer pins are inserted, the lower end of said pins are supported on the force transfer surface of said tubular sleeve with the top ends of said pins forming pressure contact surfaces against which said piston is forced when hydraulic fluid under pressure enters said sealed chamber in the hydraulic cylinder to activate the valve for re-activating that cylinder of the engine. a fluid pressure system having a source of hydraulic fluid under pressure connected to the sealed chamber in said hydraulic cylinder by at least one tube and control valves in the fluid pressure system to control the hydraulic force exerted against the top of the piston in said hydraulic cylinder.