|The Vision C 220 BLUETEC.|
Mercedes-Benz is unveiling its BLUETEC emission-control technology in combination with a consumption-optimized four-cylinder engine at the 2007 Geneva Motor Show.
With output of 125 kW (170 hp) and a peak torque of 400 Nm (295 lb-ft), the Vision C 220 BLUETEC offers fuel consumption of 5.5 liters per hundred kilometers (43 mpg US) on the NEDC, due largely to modified diesel engine technology and an intelligent system of energy management.
The six-cylinder E320 BLUETEC which went on sale in North American in October 2006 consumes 6.7 liters/100km (35 mpg US). Following the US launch, the company will also introduce BLUETEC in other markets. The technology is currently being adapted to European market requirements and further Mercedes Benz models, the aim being to also offer BLUETEC in passenger cars for European
The four-cylinder engine in the Vision C 220 BLUETEC, like the standard-production engines, includes four valves per cylinder, third-generation common-rail direct injection, a turbocharger with a variable nozzle turbine and exhaust gas recirculation. A highly sensitive electronic engine management unit reacts precisely to an extremely wide range of operating conditions and, in so doing, optimizes the combustion processes.
The BLUETEC technology in the Vision C 220 BLUETEC still includes an oxidizing catalytic converter, which reduces emissions of carbon monoxide (CO) and unburned hydrocarbons (HC), as well as a particulate filter. A modified NOx storage catalytic converter with a substantially extended service life, including patented on-board ammonia generation, is combined with an additional SCR catalytic converter to minimize nitrogen oxides. This process of exhaust-gas aftertreatment requires no additives (such as AdBlue for urea SCR).
The Vision C 220 BLUETEC is prepared for the more stringent European emission limits imposed by Euro 6, which will apply to all new vehicles from September 1, 2015. Euro 6 stipulates NOx limits of 0.08g/km—about 30% of the current Euro 4 limits. (The US 50-state Tier 2 Bin 5 standard requires 0.07 g/mi—or 0.043 g/km). All Mercedes-Benz diesel vehicles with a particulate filter fitted as standard already undercut the particulate limits that will apply from 2011 onwards.
For the US market, Mercedes-Benz will be offering three further V6 BLUETEC models—R Class, M-Class and GL-Class—with Tier 2 Bin 5 certification for all 50 states from as early as 2008.
On the standard-production version of the new C-Class, which will also premiere at the Geneva Motor Show, Mercedes-Benz has reduced lifecycle CO2 emissions by 15% (nine tonnes) compared to the prior generation; NOx emissions by 20%; and hydrocarbons by 12% according to a study certified by the German technical inspection authorities (TÜV).