Innovations Overall vehicle 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 following concept was therefore put in place: • Arrangement of radiator and A/C condenser on left-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.
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. Integrated exhaust management With respect to exhaust aftertreatment, 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 camshaft adjustment function for increasing the exhaust temperature supports active regeneration of the diesel particulate filter during operation. b b Note In parallel to the Unimog Euro VI, the U 400.103/123 will still also be produced with Euro III/V engines. 9 Introduction of the New Unimog Generation | Model Series 405 – This printout will not be recorded by the update service. Status: 03 / 2013 –