Liebherr has announced the industry’s first hydraulic hybrid drive for mobile harbour cranes. The new Pactronic - hybrid drive system addresses two critical issues: increasing handling performance and reducing fuel consumption. The Liebherr Pactronic is a new hydraulic hybrid drive system. It is characterized by an energy storage device. A hydraulic accumulator supplements the fluid pump in delivering power to the system. It serves as a pressure storage reservoir incorporating a gas in conjunction with a hydraulic fluid. Energy is stored in this compressed gas to be released upon demand.