After “positive experiences” in the American market since autumn 2006, Mercedes is offering its environment-friendly Bluetec diesel emissions control system in European E300 model.
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The automaker said it had achieved a “massive reduction in emissions” and compliance with the Euro 5 standard whilst retaining the same favourable consumption figures.
The Bluetec technology reduces diesel emissions, in particular nitrogen oxides. Among the 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 and ceramic glow plugs, which ensure quick cold starts every time for reduced-compression engines.
Exhaust gas treatment 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.
Mercedes-Benz is set to offer another three V6 Bluetec models in the US – from the GL, M and R-Class ranges – from 2008.
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By GlobalData
