Fluid controlling system for an engine

In an engine having a cylinder, a piston reciprocally moveable in the cylinder, a head defining a port and a valve seat opening into said cylinder, and an engine valve having a valve stem, said engine piston, cylinder and head defining a combustion chamber in which gas is pressurized in response to combustion, said engine valve being moveable between an open position spaced from said valve seat in said port and a closed position against said valve seat, the improvement comprising:

• a spring associated with the engine valve and adapted for biasing said engine valve toward the open position, said engine valve being an outwardly opening valve;
• a pressurized fluid source having a pressure magnitude biasing the valve in a direction opposed to the force of the spring on the valve;
• a low pressure fluid source;
• a first hydraulic cylinder having a piston, a head end, and a rod end, said first hydraulic cylinder head end having a pressure chamber;
• a second hydraulic cylinder having a piston, a head end, and a rod end, said second hydraulic cylinder head end having a pressure chamber, said first hydraulic cylinder being fixedly connected to the second hydraulic cylinder, said rod end of the first hydraulic cylinder being fixedly connected to the piston of the second hydraulic cylinder, said piston of the second hydraulic cylinder being fixedly connected to the engine valve stem, and said first and second hydraulic pistons each having a displacement area sized relative one to the other with the displacement area of the first hydraulic piston being less than the displacement area of the second hydraulic piston;
• a fluid pathway from the first hydraulic cylinder pressure chamber, through the valve stem and into the combustion chamber;
• means connected to the high and low pressure fluid sources for controlling the passage of fluid into and from the first and second hydraulic cylinder pressure chambers and into the combustion chamber.