The
Stuttgart-based brand
Ultra Low
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"Ultra Low Sulfur Diesel"
(ULSD)
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Mercedes-Benz launches BLUETEC initiative in
Europe
Stuttgart - The
inventor of BLUETEC technology is entering a new era with the new E 300 BLUETEC.
On the back of positive experiences gained in the American market since the
autumn of 2006, the environment-compatible BLUETEC diesel system is now also
available in a passenger car model in the European market.
Mercedes-Benz has achieved a massive
reduction in emissions and compliance with the EU 5 standard whilst retaining
the same favourable consumption figures. Thanks to the intelligent BLUETEC
technology, this compression-ignition engine is one of the world's cleanest
and most efficient drive trains. Environmental compatibility, driving pleasure
and comfort are among the strengths of the new E 300 BLUETEC, with which
Mercedes-Benz is launching its BLUETEC initiative in Europe. Based on the
proven CDI models, this E-Class boasts cutting-edge emissions management
and excellent ecological, economical and dynamic characteristics. The 3.0-litre
V6 engine developing 155 kW/211 hp and an imposing 540 Nm of torque burns
just 7.3 litres* of diesel per 100 kilometres and its emissions levels already
fulfil future Euro stipulations. The E 300 BLUETEC accelerates from 0 to
100 km/h in 7.2 seconds* and is capable of a top speed of 244 km/h*. At the
same time, the BLUETEC model - like all its E-Class stable-mates - combines
the suspension comfort typical of Mercedes with the proverbial "feel-good"
ambience in the interior and outstanding safety standards. The BLUETEC technology
developed by DaimlerChrysler does an excellent job of reducing diesel vehicle
emissions, in particular nitrogen oxides. To this end, the engineers at the
Mercedes-Benz Technology Centre pursue various strategies. For example, in
an initial step the formation of nitrogen oxides in the E 300 BLUETEC has
been reduced through optimisation measures inside the engine.
* provisional data
Among the other measures employed are:
· A reduction in the compression ratio to 16.5:1
· The use of special piezo injectors with reduced hydraulic flow
· An optimised exhaust gas turbocharger with variable turbine geometry
· Optimised exhaust gas recirculation control with raised return rate
· The use of ceramic glow plugs, which ensure quick cold starts every
time for reduced-compression engines |
Complementing the revisions carried out
inside the engine is an efficient exhaust gas treatment system tailored specially
to the E 320 BLUETEC powerplant. This includes the oxidation catalytic converter
- which cuts emissions of carbon monoxide (CO) and unburned hydrocarbons
(HC) - and an additive-free diesel particulate filter. A further developed
NOx storage catalytic converter with a patented onboard ammonia generation
system teams up with an SCR catalytic converter and enables extremely low
nitrogen oxide emissions. This exhaust gas treatment system works without
the need for any additional equipment. |
BLUETEC initiative already seeing
success
Mercedes-Benz first launched its BLUETEC
initiative for passenger cars in the USA. It was here that the E 320 BLUETEC
was launched onto the market in October 2006 as the world's only passenger
car to be fitted with this technology. And Mercedes-Benz is set to offer
another three V6 BLUETEC models in the US - from the GL, M and R-Class ranges
- from 2008. International automotive journalists have been among those to
acknowledge the brand's ongoing commitment to this technology, voting the
E 320 BLUETEC "2007 World Green Car". The members of the jury from 22 countries
praised BLUETEC as a pacesetter for new and extremely clean diesel technology.
BLUETEC is also in use in commercial vehicles. Indeed, the technology has
been proving its mettle here since 2005 and is now available for all commercial
vehicle model series. DaimlerChrysler has already delivered over 60,000
Mercedes-Benz trucks and buses with this pioneering emissions-reducing system.
|
BLUETEC - a building block in the reduction
of CO2
In the ongoing debate on current and future emissions standards for vehicles,
one frequently overlooked fact is that carbon dioxide (CO2) emissions
are not covered by conventional exhaust emissions limits. A car's
CO2 emissions are directly linked to fuel consumption. A reading
such as 140 g CO2/km, for example, is nothing other than an
alternative fuel consumption figure, equating to fuel consumption of around
5.3 l/100 km in diesel engines or 5.9 l/100 km for petrol models. The same
figure would also be recorded by equivalent cars which pumped out their exhaust
gases into the environment unfiltered - i.e. without being treated though
catalytic converters or systems minimising particulate output. In contrast
to CO2 emissions, exhaust components like nitrogen oxide, carbon
monoxide, hydrocarbons and combustion residue in the form of particulates
can all be reduced through exhaust gas treatment - in some cases to the point
where they are barely detectable. This is where the innovative, modular exhaust
gas purification system BLUETEC comes into its own. BLUETEC gives diesel
vehicles the technology they need to operate in an environment-friendly way
and will meet the planned emissions limits of the future as well. In addition
to the E 300 BLUETEC, all future BLUETEC models will satisfy the Euro 5 standard
due to come into force in 2011. BLUETEC thus represents an important building
block in the reduction of CO2 emissions.
Current and future emissions limits for diesel vehicles in the EU*
|
CO
(g/km) |
NOx
(g/km) |
HC + NOx
(g/km) |
Particulate
(g/km) |
EURO 4
All new vehicles from 1.1.2006 |
0.50 |
0.25 |
0.30 |
0.025 |
EURO 5
All new vehicles from 1.1.2011 |
0.50 |
0.18 |
0.23 |
0.005 |
EURO 6
All new vehicles from 1.9.2015 |
0.50 |
0.08 |
0.17 |
0.005 |
* Group M1, passenger-carrying vehicles with a maximum of eight seats not
including the drivers seat, permitted gross vehicle weight up to 2500
kg, NEDC 2000 test procedure
READER COMMENTS
DaimlerChrysler Communications,
Stuttgart (Germany), Auburn Hills (USA), August 10, 2007 |
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