Buslovers Combining high performance with strict environmental standards was the focus of Scania’s development work for the new V8 engine.
Create the truck engine of the future: a V8 with the highest possible performance that meets Euro 5 requirements and is prepared for later environmental standards. This was the task facing Scania’s engine developers as they began work on the new V8. Five years later, the project has now achieved these objectives.
“Without compromising on fuel consumption, we have succeeded in building a very powerful engine,” says Björn Westman, head of engine development at Scania. Westman leads the V8 development teams.
Lighter and stronger
To achieve 3,500 Nm and 730 horsepower, Scania’s engineers built new features into the engine. The engine block is cast from compacted graphite iron − lighter and stronger than before − and the swept volume has increased from 15.6 to 16.4 litres.
The new engine is also Scania’s first V8 featuring variable turbo geometry and Scania XPI common rail extra-high-pressure fuel injection. Variable turbo geometry ensures uniform high torque at low revs. With the Scania XPI, fuel injection timing and injection pressure can be adjusted with great precision regardless of engine speed. These choices of technology enable the engine to meet the strict EEV standard (enhanced environmentally friendly vehicle), which is tougher than Euro 5, without a particulate filter.
The emission control system is based on selective catalytic reduction (SCR) technology.
“We regard SCR as a technology of the future for this type of engine operation, and we have developed a new advanced engine management system that includes the dosage of AdBlue additive,” says Robert Hedström, project coordinator at Scania’s engine development unit. “The system is also Euro 6-ready.”
Both Westman and Hedström emphasise the new V8’s continuity and affinity with the rest of Scania’s engine range, despite the innovations. All parts and components in the new engine belong to the Scania modular product system.
“By building on our modular philosophy, for example we can use the same cylinder diameter as in other newly developed Scania engines,” says Westman. “This gives our customers reliable access to parts and to tried-and-tested technology.”
The powertrain has been adapted to the new engine and is equipped with the new, fully automated Scania Opticruise gearchanging system. But no major changes were needed. A V8 engine is “gentle” to the powertrain, since it provides more uniform torque to the transmission and drive axle.
A Scania V8 is associated with power, good fuel economy and long service life – since a V8 does not have to work as hard. But, explains Westman, powerful engines will also be required to enable the transport industry to contribute to a more sustainable society.
“We expect more powerful engines to be needed to carry heavier and larger payloads,” he says. “A rig that can haul more cargo is better for society, and fewer large trucks are better than many small ones. This will mean lower overall fuel consumption and CO2 emissions.”
|R 500, R 560, R 620||R 730|
|Swept volume||15.6 litres||16.4 litres|
|Power and torque||500 hp 2500 Nm||730 hp 3500 Nm|
|560 hp 2700 Nm|
|620 hp 3000 Nm|
|Emissions||Euro 5||Euro 5 and EEV|
|Emission control||Scania SCR||Scania SCR|
|Fuel Injection||Scania PDE||Scania XPI|
|Gearbox options||12+2-speed range-splitter||12+2-speed range-splitter|
|Manual gearchanging||Scania Opticruise|
|Scania Opticruise||Scania Retarder|
More information about Scania’s new V8 range at: www.scania.com/V8
We expect more powerful engines to be needed to carry heavier payloads.”
Björn Westman, head of engine development
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