The new Mercedes-Benz Unimog and Econic: Cleaner, more efficient, more powerful - Strong new image for globally unique concepts
As the new Europe-wide Euro VI emission standards will be valid from 1 January 2014, Mercedes-Benz is rounding off its range of commercial vehicles including the Atego, Antos, Arocs and Actros by launching the two special vehicle product ranges Unimog and Econic to comply with the new regulations. The new engines have up to 90 percent fewer exhaust gas and particulate matter emissions than those used up to now.
New structures for the Unimog product range
In the new set-up for the Unimog implement carriers, the Unimog U 216 and U 218 replace the previous Unimog U 20 as compact entry-level models and are getting closer to the versions with stronger engines now known as U 318, U 423, U 430, U 527 and U 530. Here the first number denotes the size (for instance 4 corresponds to the current Unimog U 400), the following two numbers stand for the first two numbers of horse-power performance, for example 23 for 230 hp. They are all being launched with, amongst other things, a completely redesigned panoramic cab, new work and power hydraulics systems as well as synergetic traction drive which allows changing over from manual transmission to hydrostatic transmission while driving and all of these innovations make an appreciable difference to the efficiency of the Unimog. The extremely mobile off-road Unimog U 4000 und U 5000 have also been given a more advanced design in important details and are now known under the reference numbers U 4023 and U 5023.
For the Econic – the 2 and 3-axle chassis versions now as 4x2, 6x4 and 6x2/4 with electronically steered forward and trailing axles – the concept of the low-entry cab has now been given more potential with a great number of important ergonomic innovations. In addition, it is clearly more cost-effective as it has reduced its fuel consumption and repair and maintenance costs. However the payload remains the same despite the Euro VI.
Facing the future efficiently with BlueEfficiency Power
Two BlueEfficiency Power model series engines with radically new designs ensure that the Unimog complies with Euro VI emission standards and is also much more efficient especially when using implements as here greater output is available. The Econic has also been given two engines from this generation: engine types OM 934 and OM 936 with three 4-cylinder and two 6-cylinder versions and performances ranging from 115 kW (156 hp) to 260 kW (354 hp) with cubic capacities of 5.1 litres and 7.7 litres. The state-of-the-art drive units combine low fuel consumption with extremely clean exhaust gas and ensure that the Unimog is on the road altogether more efficiently despite the great amount of effort invested in its construction to ensure that it complies with Euro VI. For the Econic it has been possible to achieve up to four percent lower fuel consumption. The engines - already successfully used in the Antos and Atego - are very convincing with their improved output and torque and clearly increased acceleration over the whole transmission range. Despite the Euro VI the fuel consumption of the Unimog has also been reduced.
High-tech drive units from a state-of-the-art engine generation
The new solenoid injectors with ten-hole jets provide the best possible injection for every working situation. These new, long-stroke engines with cooled exhaust gas recirculation and a specific engine output of up to 33.8 kW/l (46 hp/l) are among the most effective diesel units. The new 5.1 litre 4-cylinder version also produces a convincing top torque of 650 Nm for the entry-level model Unimog U 216 with 115 kW (156 hp) which remains constant over the whole of the main transmission range from 1200 to 1600 rpm.
The six-cylinder gives a powerful performance
The performance spectrum of the big 7.7 litre in-line 6-cylinder OM 936 follows directly on the heels of the extremely compact four-cylinder version. It is used in both the U 427 and U 430 as well as the U 527 and U 530 and here for both versions with 200 kW (272 hp) or 220 kW (299 hp). This means that the Unimog has been given top-level motorisation. The best torque result lies at 1200 Nm for the 1200 to 1600 speed range. The Econic has been fitted with 6‑cylinder engines providing an output of 220 kW (299 hp) and 260 kW (354 hp).
Economy of space on compact chassis
Great importance was also attached to economy of space when complying with the exhaust gas cleaning standards required by Euro VI which comes into force on 1 January 2014. This was a task which faced the designers with demanding challenges considering the compact chassis of the Unimog vehicles and also the low-entry concept of the Econic. In addition to the recirculation of the exhaust gas inside the engine, cleaning the exhaust gas also involves a system comprising the oxidation catalytic converter, a closed particulate matter filter, AdBlue injection and an SCR catalytic converter connected in a series.
Credits: Daimler AG
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