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Development Programme funded by the
Ministry of Knowledge Economy in South Korea.
Doosan is the lead partner in the project.
Expected to burn at least 20% less fuel than
a standard DX225 hydraulic excavator, the
Hybrid machine will also dramatically cut CO2
emissions. It is equipped with will be equipped
with a diesel engine, an electric slew motor, an
electric converter and an ultra-capacitor that will
store excess energy during slewing and lightduty
work. The reserve of electricity that has
been generated and stored will then be utilised
to part power the excavator during heavier duty
work. This arrangement allows the speed of the
diesel engine to be reduced.
The next step in the Doosan’s hybrid
machine development programme is likely to be
the application of the technology to both wheel loaders and forklifts. Meanwhile, the company also used Bauma to
provide a visual indication of how its excavators and wheel loaders might appear even further into the future.
Futuristic concept excavator
Colourful graphics and scale models were used to depict a pair of futuristic ‘eco transformers’ – a CX Eco Energy
tracked excavator and a CL Eco Energy wheeled loader. The excavator has four articulating triangular track
assemblies to enable it to traverse rough ground and operate more safely on slopes.
The cab of the CX Eco Energy excavator slides forward to provide the operator with a better view down the hole
when required. However, somewhat surprisingly given the current trend towards short tail machines, this concept unit
has an extending counterweight at the back of what is already a lengthy superstructure!
The ‘star gazers’ have included a hybrid power system and they predict the use of an emotional haptic control
system and intelligent solar-control glass (which will adjust its transparency level and colour according to the weather
conditions).
This glass sounds expensive – let’s hope that vandalism has been eradicated before its introduction!
New Doosan branded breakers
Coming back down to earth, Bauma was used to introduce its new Doosan branded hydraulic breakers for the
European market. Models on show were the DXB170 and the DXB260 (suitable for use on excavators weighing 18 to
28 tonnes and 27 to 37 tonnes respectively).
Other breakers in the DSC36 (for 4 to 10 tonne carriers, DXB100 (10 to 20 tonne carriers) and DXB190 (20 to 30
tonne carriers. The breakers, which incorporate Montabert technology) include an energy recovery system and a
patented valve system.
Wheel loaders represent an important
part of Doosan’s construction equipment
line-up and the company used Bauma to
highlight its replacement of the DL400 with
the new DL420. The DL400 has been
Doosan’s best selling wheel loader as it,
like the DL420, slots into the very important
250 to 300hp segment of the wheel loader
market.
Page 26
This scale model of a CX Eco
Energy tracked excavator
reveals some of the features that
could be included on Doosan
machines in the future.
Cummins QSM 11 in new
DL420 loader
At the heart of the new DL420 is the Tier 3 /
Stage IIIA emissions compliant Cummins
QSM 11 10.8 litre electronically controlled
engine. Rated at 209 kW (284hp) this
To utilise the latest Cummins QSM 11
engine, Doosan has introduced this DL420
to replace its popular DL400.
CP&E Contractors Plant & Equipment Vol 1 No 6