Energy recovery system having integrated boom/swing circuits

A method of recovering energy, comprising:

• directing pressurized fluid into a linear actuator to move a work tool;
• storing pressurized fluid from the linear actuator in a boom accumulator;
• directing pressurized fluid into a swing motor to move the work tool;
• storing pressurized fluid from the linear actuator in a swing accumulator;
• and
• selectively communicating the boom and swing accumulators.

A machine, comprising:

• an undercarriage;
• a boom pivotally connected to the undercarriage;
• a work tool operatively connected to the boom;
• a swing motor configured to swing the boom and work tool;
• a pair of linear actuators configured to lift the boom and work tool;
• a boom accumulator configured to selectively collect pressurized fluid from the pair of linear actuators and discharge pressurized fluid back to the pair of linear actuators;
• a swing accumulator configured to selectively collect pressurized fluid from the swing motor and discharge pressurized fluid back to the swing motor;
• a common accumulator passage fluidly connecting the boom accumulator and the swing accumulator;
• a tank;
• a pump configured to draw fluid from the tank and pressurize the fluid;
• at least a first 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 selectively driven by fluid discharged from the boom accumulator and the swing accumulator to power the pump;
• and
• a return passage extending from an outlet of the motor to the common accumulator passage.