Scania utilises gravity to save fuel

  Scania utilises gravity to save fuel

Business Wire

SÖDERTÄLJE, Sweden -- October 2, 2013

In the autumn of 2013 Scania introduces Eco-roll, an advanced system with the
potential to lower customer’s fuel costs by up to two percent. The Eco-roll
system calculates when a truck should use gravity to roll in neutral downhill.

Customers in Europe who order a truck with Scania Opticruise with Active
Prediction starting in the autumn of 2013, will from the first quarter 2014 be
able to save fuel and money by using a new feature, Scania Eco-roll. The
system calculates which is the most fuel efficient, whether to roll down hills
with the transmission in neutral and the engine idling, or to use engine
braking with the fuel supply switched off.

Choosing which is the most fuel-efficient – to cruise down a hill in neutral
or under engine braking – is not as obvious as it may sound. Scania Active
Prediction makes the calculation automatically. If the system chooses Eco-roll
in order to make use of the kinetic energy, then the objective is to roll
downhill in neutral for at least ten seconds since shorter sessions would be
less useful. At the same time the speed should not be so high that engine
braking is engaged, since this negatively affects the fuel energy already
transferred to the engine.

Scania Active Prediction uses both GPS (for positioning) and topographic maps
to control speed. Depending on which performance mode drivers select, the
truck utilises a number of strategies to either use as little fuel as possible
or to optimise a high average speed. Where topographical map data is
available, Scania Eco-roll is standard on long-haulage trucks, provided that
the truck is equipped with Scania Opticruise and Active Prediction, a
two-pedal system and a Euro 6 engine.

A further development of Scania Active Prediction is that the system is now
even better at optimising gear changing strategies. By analysing how much
remains of an uphill gradient, unnecessary gear shifting can be avoided by
utilising the low-rev torque advantage of Scania engines. – – – – –

Scania is one of the world’s leading manufacturers of trucks and buses for
heavy transport applications, and of industrial and marine engines.
Service-related products account for a growing proportion of the company’s
operations, assuring Scania customers of cost-effective transport solutions
and maximum uptime Scania also offers financial services. Employing some
38,600 people, the company operates in about 100 countries. Research and
development activities are concentrated in Sweden, while production takes
place in Europe and South America, with facilities for global interchange of
both components and complete vehicles. In 2012, net sales totalled SEK 79.6
billion and net income amounted to SEK 6.6 billion. Scania press releases are
available on

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For more information, please contact:
Johan Björkegren, Product Information Powertrain
tel. +46 70 161 53 11
Örjan Åslund, Product Affairs
tel. +46 70 289 83 78
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