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Mercedes-Benz Actros: economical and environmentally compatible: The Mercedes-Benz Actros with the latest generation of the OM 471 engine is the perfect combination of economy and ecology – proven in precise tests
OverviewMercedes-Benz Actros: designed for maximum efficiency: Mercedes-Benz Actros: maximum efficiency for long-distance transportMercedes-Benz Actros: economical and environmentally compatible: The Mercedes-Benz Actros with the latest generation of theMercedes-Benz OM 471: economical, powerful and reliable: Consumption reduced, driving dynamics enhanced: the-latest generat
- Benefit for companies: outstanding economy
- Benefit for drivers: further enhanced dynamism
- Benefit for society: maximum environmental compatibility
- Up to three percent lower fuel consumption proven in precise tests
It impresses companies with its outstanding economy, drivers with its dynamism and starting power, society with its low emissions – the Mercedes-Benz Actros with the latest-generation OM 471 heavy-duty engine combines seeming opposites. The economical truck is also an ecological truck. A statement backed up by the long-distance truck's performance data and proven in tough tests.
Benefit for companies: outstanding economy
Never before has a long-distance truck been as systematically designed for maximum efficiency as the Mercedes-Benz Actros. It stands for the ultimate in economy in the tough transport business. With the introduction of the latest-generation OM 471 heavy-duty engine, the already low fuel consumption is further reduced by up to three percent.
This is thanks to sophisticated engine technology such as the second generation of the unique X-Pulse injection system, a patented solution for exhaust gas recirculation and simultaneous control of the exhaust gas turbocharger, a highly precise turbocharger developed and produced in house, plus a wealth of other measures including a longer axle ratio.
Economy also means maximum robustness: several components can be omitted because the engine is systematically pilot-actuated. The motto for this is as simple as it is logical: if it's not installed, it can't wear out. In this way the outstanding reliability of the OM 471 is further enhanced.
Benefit for drivers: further enhanced dynamism
For the driver of the Actros with the latest-generation OM 471, lower fuel consumption nevertheless means greater driving dynamics. A fast and steep increase in output ensures powerful starting and acceleration, even from the bottom of the rev range. Even from idle speed, the engines pull powerfully and almost reach their peak torque before the rev counter even hits 1000 rpm. Some 95 percent of the maximum torque is then available between around 1300 and 1400 rpm, and the rated speed is now 1600 rpm.
Despite nominally identical maximum output and torque data, the engines operate far more powerfully in the most frequently used engine speed range between 1000 and 1500 rpm. On the road this translates into outstanding drivability under all conceivable conditions across an extremely wide engine speed range of around 1000 rpm.
Benefit for society: maximum environmental compatibility
In the case of heavy-duty commercial vehicles, maximum efficiency is automatically linked to the best possible environmental compatibility. The low fuel consumption achieved by the Mercedes-Benz Actros is not only good for the company's bank balance, it also preserves resources: assuming a typical mileage of 130,000 km per year, predominantly demanding routes and full capacity utilisation, the Actros with the latest-generation OM 471 saves around 1100 litres of fuel per year compared to its predecessor. This is equivalent to a reduction in CO2 emissions of around three tonnes for every single truck.
Extremely long maintenance intervals for engine oil service and cleaning of the particulate filter likewise help to protect the environment. The emissions of the Actros with Euro VI emissions standard are already at the limit of detection.
Up to three percent lower fuel consumption proven in precise tests
The Mercedes-Benz test engineers have proven the outstanding economy of the Mercedes-Benz Actros with the latest-generation OM 471 in tough tests – rather than being theoretical, its lower fuel consumption is proven in practice.
Standard test routes include the motorway link from Stuttgart to Hamburg and back, which has been used by the testing department for around two decades. The 1520 km stretch is not only one of the most important main routes in Central Europe, it also offers a varied route profile: a mix of hilly stages, demanding mountain sections and flat stretches.
Daimler Trucks does not just compare its own trucks with each other, competitor models also take part in the tests. Thorough preparation is vital when it comes to making objective measurements. The trucks must be directly comparable in terms of engine power and torque, transmission, axle ratio, and control systems such as Predictive Powertrain Control (PPC). The cabs and the trailers, including the load and tyres, are likewise standardised. Further prerequisites for an in-house comparison test include painstaking checking of all components on an output dynamometer, wind-tunnel measurements for correctly installed and adjusted aerodynamic attachments plus calibration of the speedometer and fuel measuring system.
The vehicles are always driven under the same conditions as the reference vehicle, with as few driver interventions as possible. Additional test requirements include stable general conditions such as avoidance of heavy traffic and environmental influences such as strong winds or rain. Changing drivers and swapping trailers evens out any external influences.
Despite everything and even with the most painstaking of preparations, the fuel consumption differs by up to three percent per tour due to various influences such as the weather or traffic. These differences are evened out by performing several test drives in succession and conducting a detailed assessment.
Meticulous preparation for comparative tests
Certain values show how important maximum neutrality is in comparative tests. A truck's fuel consumption falls by about two percent during its running-in phase from around 80,000 km. Tyre type and brand can influence fuel consumption by around five percent. Different tread depths can have the same effect. The difference between summer and winter diesel likewise affects fuel consumption by around five percent. Last but not least, having one tonne less weight on a 40 t articulated truck used for long-distance transport reduces fuel consumption by around 1.5 percent.
As well as being checked by incorruptible measuring equipment, the fuel consumption is also determined by precise refuelling. Important factors here include an always constant position at the identical fuel pump, precise refuelling up to a specified mark and measurement of the fuel temperature. Even a difference in fuel temperature of around ten degrees makes a difference of about one percent due to the different expansion of the fuel. In a tank holding 500 litres, this means a difference of five litres.
The test engineers have taken all these parameters and many others into account. The result is clear: on the road, the Mercedes-Benz Actros with the new-generation OM 471 really does consume around three percent less fuel. And it has verifiably lower fuel consumption than its competitors. The Actros truly does represent maximum efficiency among the long-distance trucks in its class.