A new 770 horsepower output V8 headlines an updated range of heavy duty Scania engines announced last week.
The commercial vehicle manufacturer has launched new V8 engines it said sets a new benchmark of on-road output, vastly improved fuel efficiency in addition to the record 770 hp rating.
Total savings can reach six per cent – or more – under the right conditions claimed Scania, when the recently unveiled G33 gearbox is included in the powertrain.
The fuel savings are reportedly the result of extensive fine-tuning and development by Scania’s engineers, involving technologies at the forefront of internal combustion engine development.
Among them, and provided by more than 70 new parts, are reduced internal friction, higher compression ratios, improved aftertreatment systems and a new powerful engine management system (EMS).
Locally, the Swedish truck maker has not confirmed when the new range will be available in Australia.
The new flagship 770 hp engine produces 3700 Nm of torque between 1000-1450 rpm, an increase of 40 hp and 200 Nm on Scania’s previous top of the line 730 hp engine.
The new range of Euro 6 compliant engines comprises the 530, 590, 660 and 770 hp outputs, all of which share the same 16.4-litre advanced technology compacted graphite iron block.
For Euro 5 customers, Scania continues to offer the 620 hp V8 which will be mated to the new generation G33CM gearbox.
“We have built upon Scania’s vast V8 experience and continue to improve what generations of skilled engineers have learnt, created and achieved before us,” says Göran Lindh, Chief Engineer for Scania’s V8 engines.
“There are no quantum leaps, it is all about refining things and adding the latest technology. The new EMS enables a smarter and more advanced engine control software with higher accuracy. We can calculate more precisely how much fuel is needed and when.”
The EMS (Engine Management System) interacts with the AMS (Aftertreatment Management System). Both are critical to meet the current and coming Euro 6 regulations regarding NOx and particles.
Scania has added a new concept where AdBlue is injected twice: once directly after the exhaust brake and a second dose at the “normal” position in the silencer itself. With the extra dosing, the evaporation of the AdBlue is improved during low load cycles since the temperature is higher near the outlet manifold. With the extra dosing, the aftertreatment strategy is improved and also contributes to better fuel efficiency.
The updated V8 range is now equipped with a new high-pressure fuel pump where the pumping elements are individually controlled through Active Inlet Metering. The overall pressure and inlet control will be enhanced with improved diagnostics for increased uptime and performance. The new pump is also optimised for minimising engine oil consumption. Also, the compression ratio and the maximum cylinder pressure has been raised, to further improve combustion and fuel efficiency.
With its massive output of 770 hp, the new DC16 123 engine replaces the previous 730 hp by shedding certain heavy components and simplifying others has lowered its weight by up to 75 kilograms.
“Here the biggest difference is evident,” says Lindh. “The increased power comes together with huge fuel savings, a result we were able to reach thanks to the introduction of the latest technologies. It has an SCR-only after-treatment system, a robust, fixed geometry turbocharger and the same kind of single-bank exhaust manifolds as the other three V8s.”
The powerful DC16 123 produces its 770 hp with the help of bigger injectors and a fixed geometry turbocharger using ball bearings. The result is faster response and improved combustion.
“The new single-bank manifolds actually come with an additional advantage,” said Lindh. “Not only are they lighter and more efficient but they also contribute to the distinctive V8 sound, the typical ‘blatt’ that so many Scania customers and V8 fans appreciate. It does not generate more noise, but this is rather the result of how the exhaust gases are allowed to collide, due to the firing order, inside the manifold on their way out.”