9Introduction of the New Unimog Generation |Model Series 405
Innovations
Overall vehicle
b Note
In parallel to the Unimog Euro VI, the U 400.103/123
will still also be produced with Euro III/V engines.
Numerous optimizations and new features have been phased
into the new Unimog generation. As a result, solutions have
had to be found for the reduction in installation space availa-
ble. The manoeuvrability and compact dimensions (2.15 m
wide) of the vehicle have nevertheless been retained and
existing implements can therefore still be used almost wit-
hout modification.
The holistic rework of the product features of the new Blu-
eTec 6 implement carrier is described below under brief
headings:
The cooling system has been adapted to the new technology.
As a result of the uprated engines with cooled exhaust gas
recirculation, cooling power requirements have also incre-
ased. The development of the modified cooling system was
based on the aim of retaining the compact vehicle concept
while integrating larger radiators at the same time.
The following concept was therefore put in place:
• Arrangement of radiator and A/C condenser on le-hand
side of vehicle. This reduces radiator soiling during wor-
king operations.
• Cleanfix reversible fan with automatic control and high-
speed fan drive as special equipment for dirt-intensive
operations (in preparation).
• Swiveling A/C condenser in combination with a wide-
meshed radiator core and smooth radiator slats for easy
cleaning of the radiator unit.
• Charge air cooler decoupled from the radiator and loca-
ted under the engine hood.
• Greater efficiency of fan hydraulics due to variable dis-
placement pump and demand-based, separate control of
both fans. The benefit results from the reduced energy
requirement and optimized driving and working perfor-
mance, including under extreme conditions.
Integrated exhaust management
With respect to exhaust aertreatment, the new engine ge-
neration uses the BlueTec 6 technology which has already
proven its effectiveness in practical use on mass-produced
heavy duty engines.
The exhaust management system ensures that filter regene-
ration is carried out according to requirements.
• The cooled exhaust gas recirculation system reduces
the proportion of oxygen in the combustion mixture. This
results in the production of less nitrogen oxide during
combustion.
• The camsha adjustment function for increasing the
exhaust temperature supports active regeneration of the
diesel particulate filter during operation.
– This printout will not be recorded by the update service. Status: 03 / 2013 –
