Doosan has launched the new DX350LC-7 Stage V 36t crawler excavator, which features its D-ECOPOWER technology.
The DX350LC-7 is the first Stage V model to feature Doosan’s innovative D-ECOPOWER technology, providing operators with higher productivity and lower fuel consumption per hour, as well as smoother controls.
Like the new DX300LC-7 30t Stage V model launched earlier in 2019, the DX350LC-7 excavator builds on the successful design of the previous Stage IV machine, said Doosan.
“As well as higher performance and cost-savings, the new DX350LC-7 Stage V excavator provides major enhancements in operator comfort, uptime and return on investment, with a strong focus on low fuel consumption, increased power, robustness and versatility,” the company stated.
The D-ECOPOWER technology focuses on the role of the hydraulics system and Doosan said it demonstrates its continuous iteration of all the processes and components utilised in the company’s new generation products to achieve “unprecedented levels” of diesel energy efficiency.
Doosan’s D-ECOPOWER technology utilises an electronic pressure-controlled pump within a closed centre hydraulic system to accomplish increases of up to 26% in productivity and up to 12% in fuel consumption improvements, depending on the mode selected. A closed centred main control valve minimises pressure loss, while the electric pressure-controlled pump manages and optimises engine power more effectively.
The D-ECOPOWER system uses nine sensors to detect the amount of hydraulic oil necessary to accomplish a specific task and precisely meter the amount of oil required rather than continuously forcing a fixed amount of oil through the system, thereby improving efficiency. Software is utilised to electronically reproduce the full benefits of an open centre hydraulic system with very little energy loss. The hydraulic system and engine horsepower are fully optimised and synchronised, further reducing losses within the system.
Improved feedback to the operator through the joystick results in improved machine control and less operator fatigue, said Doosan. The acceleration and deceleration of the excavator workgroup functions are smoother, allowing operators to perform repetitive swinging and digging motions with less jerking movements.
To meet Stage V engine emission regulations, the new DX350LC-7 excavator is powered by the latest generation Doosan DL08 diesel engine, providing 209 kW of power at 1,800 RPM.