A hydraulic energy handling system, a hydraulic parallel hybrid driveline and a working machine

A hydraulic energy handling system for a working machine (10), the hydraulic energy handling system comprising:

• a high-pressure side;
• a low-pressure side;
• a hydraulic machine for mechanically driving, and being mechanically driven by, a mechanical driveline of the working machine;
• at least one high-pressure hydraulic energy storage connected to the high-pressure side;
• a hydraulic motor having an inlet side and an outlet side;
• a hydraulic pump arranged to supply hydraulic fluid to the inlet side of the hydraulic motor;
• and
• a return line for conducting hydraulic fluid to a hydraulic tank;
• wherein the hydraulic energy handling system further comprises:
• a pressure relief valve connected between the high-pressure side and the return line, the pressure relief valve being arranged to discharge excess hydraulic energy from the high-pressure side to the return line in order to provide a braking force on the mechanical driveline;
• and
• a priority valve arrangement connected to the outlet side of the hydraulic motor, the priority valve arrangement being configured to direct a prioritized flow of hydraulic fluid to the low-pressure side.