The OM 654q in the B 220 d (combined fuel consumption: 4.5-4.4 l/100 km; combined CO2 emissions: 119-116 g/km)[15] is the first four-cylinder diesel engine to comply with the Euro 6d standard, which does not come into effect until 2020 for new models. An expanded near-engine emission control system with an additional underfloor SCR catalyst makes this possible.
Even in demanding driving situations and under challenging environmental conditions, the B-Class remains within the emission limits. This is achieved by additional selective catalytic reduction (SCR) with an ammonia slip catalyst (ASC) in the exhaust system of the B-Class. This allows a more generous dose of the reduction agent AdBlue®, as any surpluses can be reduced and converted in the SCR. These surpluses (ammonia slip) particularly occur during fast temperature changes in the exhaust tract, e.g. when moving from city traffic to the motorway.
Despite having a lower displacement than its predecessor, reduced to just under two litres, and weighing around 16 percent less, the new diesel powerplant in the B 220 d has an output of 140 kW (190 hp), precisely 10 kW more than the previous engine, and delivers an NEDC combined consumption of 4.2 litres per 100 kilometres.
Please click here to view the full press release.
SOURCE: Daimler
