| Scania home construction - cleanest truck engine ever |
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 Outline of purification steps. Click image for larger version
Scania is now showing off their first truck engines that meet emission limits Euro 6. This means that particulate emissions are reduced by almost 85 percent compared to Euro 5, and emissions of nitrogen oxides are reduced by 80 percent. Fuel consumption remains unchanged.
The secret is a newly designed small muffler jar containing an oxidation
catalyst and a full flow particulate filter, followed by two parallel
SCR catalysts (which appear with the addition of urea, thus Ad Blue) and
catalysts for ammonia slip. It takes care of those that pass its own
engine cleaning system that operates in the combustion chamber, with
variable turbocharger and exhaust gas recirculation (EGR). Although the
combustion chamber has been trimmed by the pistons had a slightly
curling. The muffler is also a series of sensors that measure
temperature and pressure drop across the particulate filter, the
information that makes motor control more precisely and also tells you
when the particulate filter needed cleaning.
- All development work has been done internally at Scania. We have
combined all the new technologies that Scania has developed in recent
years: EGR (EGR), variable geometry turbo, common-rail injection, SCR
(Selective Catalytic Reduction) and particle filtering. For it is our
new control technology for engine and emission control has now been
integrated into a system, "said Jonas Hofsten, as with the title Senior
Vice President Power train Development is the head of Scania’s engine
development, in a statement.
How clean needs a large diesel engine be? In order to meet Euro 6 will
only emit 0.4 grams of nitrogen oxides and 0.01 g of particles per kWh,
levels of the 1900s was barely measurable. But truck manufacturers have
no alternative, anyone who wants to sell cars in Europe and North
America must have engines that meet these requirements. And all will do
it.
What then is interesting for the market is about differences in cost and
fuel consumption in relation to performance. Scania's engineers have
managed to keep fuel consumption is unchanged from Euro 5 engines,
although Ad Blue tank and the new modern truck system make the vehicle
200 kg heavier. Catalytic converters are fairly expensive, but it was
cost is usually a concern for the marketing department.
When Euro 6 is introduced December 31, 2012 means that for the first
time that the emission limits in Europe, North America (EPA10) and Japan
(Post NLT) of basically equal. It is also the first step to using the
same cycle all over the world.
The engines that Scania is now placing on the market are straight sixes in 13 liters which gives 440 or 480 horsepower. |
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| Last Updated ( Saturday, 02 April 2011 ) |
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