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Edited Package: In this reportage you can learn more about exactly how Volvos new engine has been tailored to meet the tough Euro 6 environmental standards. Claes Nilsson, the president of Volvo Trucks, talkes about why it is important to constantly improve the environmental standards.
Volvo Trucks will start production of engines tailored for the tough Euro 6 environmental standards. First of the mark is Volvo's D13 460 hp engine which today powers more than one third of all Volvo Trucks. Compared with today's Euro 5 standards nitrogen oxide emissions drop by nearly 80 % and particulate emissions are halved. The Euro6 engine will hit the market during spring 2013.
Claes Nilsson (President, Volvo Trucks):
"Euro 6 is important as we want to contribute to become a better player and to support the environmental aspects of what we are doing."
Lets have a closer look at the new engine:
First the exhaust gas reaches the DPF, Diesel Particulate Filter, where the particulates are captured and burned.
The flow continues to the AdBlue mixing box, where AdBlue is injected into the exhaust stream.
The exhaust and AdBlue mix go though the two parallel SCR catalysts, where the Nitrogen Oxides are converted into pure nitrogen and H2O water vapour.
At the end, a slip cat takes care of any remaining ammonia and the cleaned exhaust gas comes out of the tail pipe.
Lets look closer at some details:
In order to treat NOX, especially in cold driving conditions such as city driving, the EGR, Exhaust Gas Recirculation, is activated.
It mixes with the cold charge air in order to get less NOX in the combustion, and to get a higher exhaust temperature, which is needed for good SCR functionality.
Another way to increase exhaust gas temperature is to create a back pressure with the exhaust engine brake.
Under normal and tough driving conditions, the DPF filter is self regenerating, but in cool cycles the catalysts and filter need some extra heat.
Diesel is sprayed into the exhaust by the 7th injector,
When the diesel hits the oxidisation catalyst it burns and creates heat for the filter regeneration.
In the near future Volvo will expand its range of Euro 6 engines.
Claes Nilsson (President, Volvo Trucks)
"We start with the most frequent 13 litre and 460 hp engine. Thereafter of course we will have a full range of Euro 6 engines before we get into the legal demand for Euro 6 as of January 1 of 2014".
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