Doosan has
launched the new DX350LC-7 Stage V 36 tonne crawler excavator.
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 30 tonne Stage V model launched earlier in 2019, the DX350LC-7
excavator builds on the very successful design of the previous Stage IV
machine. 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
D-ECOPOWER technology focuses on the role of the hydraulics system and
demonstrates Doosan’s 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. 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
1800 RPM.
The DL08
engine offers a new solution to exceed Stage V regulations without exhaust gas
recirculation (EGR), that boosts the quantity of air available during
combustion, increasing the temperature of the process and greatly reducing the
amount of particulates produced. This is combined with super-efficient
DOC/DPF+SCR after-treatment technology to ensure minimal emissions.
Thanks to
the new technology, maintenance of the diesel particulate filter (DPF) has been
greatly reduced, with no maintenance required until the machine has operated
for 8000 hours.
With the
DX350LC-7, Doosan has tried to ensure that productivity and environment
protection are truly compatible. The enhanced fuel efficiency of the DL08
engine in combination with a new hydraulic main valve and the new generation
SPC3 Smart Power Controls, provides overall fuel efficiency increases of +10%
in the S mode and +6% in the P+ mode compared to the previous generation
machine.
These are
two in a range of four power modes now available on the DX350LC-7, which help
to simplify the operation of the new excavator compared to the more complex
choice of eight power modes and SPC combinations in the previous generation
machine. The operator is able to set the power mode (P+, P, S or E) in both
one-way and two-way working modes.
