Energy recovery system for hydraulic machine

A method of recovering energy, comprising:

• drawing fluid from a tank;
• pressurizing the fluid with a pump;
• selectively directing pressurized fluid from the pump into an actuator and directing fluid from the actuator to a tank to move the actuator;
• directing fluid discharged from the actuator through a motor to drive the pump;
• and
• redirecting fluid from the motor back to the actuator.

A machine, comprising:

• an undercarriage;
• a boom pivotally connected to the undercarriage;
• a work tool operatively connected to the boom;
• a pair of linear actuators configured to lift the boom and the work tool;
• a tank;
• a pump configured to draw fluid from the tank and pressurize the fluid;
• an actuator control valve movable to selective direct pressurized fluid from the pump to the pair of linear actuators and from the pair of linear actuators to the tank;
• a motor connected to selectively receive fluid discharged from the pair of linear actuators and mechanically connected to the pump;
• an accumulator configured to store fluid discharged from the pair of linear actuators and to direct stored fluid to the motor to drive the pump;
• and
• at least one control valve disposed downstream of the motor and movable to selectively direct fluid discharged from the motor into the tank, into a first chamber of the pair of linear actuators, or into a second chamber of the pair of linear actuators.