Hydraulic drive system for a linearly actuated hydraulic piston pump

A linearly actuated hydraulic piston pump comprising:

• a pumping chamber including a pumping element disposed therein;
• a piston chamber including a piston disposed between a first section and a second section of the piston chamber,
• the piston being coupled to the pumping element;
• a control valve including a valve body,
• the valve body defining a valve chamber;
• an inlet port in fluid communication with the valve chamber and a pressurized fluid source;
• a first port in fluid communication with the valve chamber and the first section of the piston chamber;
• a regeneration port in fluid communication with an accumulator, the valve chamber, and the second section of the piston chamber at a first location;
• a second port in fluid communication with the valve chamber and the second section of the piston chamber at a second location;
• an orifice provided between the second port and the second section of the piston chamber,
• the orifice being configured to provide a restriction to a flow of pressurized fluid between the second port and the second section of the piston chamber;
• and
• a spool configured to move between a first spool position and a second spool position within the valve chamber,
• wherein the spool, in the first spool position, fluidly couples the pressurized fluid source to the first section of the piston chamber via the inlet port and the first port, and fluidly couples the accumulator to the second section of the piston chamber via the regeneration port and the second port to drive the piston in a first piston direction;
• and
• wherein the spool, in the second spool position, fluidly couples the first section of the piston chamber to a drain via the first port and a drain port, and fluidly couples the second section of the piston chamber to the pressurized fluid source via the inlet port and the second port to drive the piston in a second piston direction.