The new Mercedes-Benz GLE is the very first SUV anywhere to meet the Euro 6 d standard and level 2 of the RDE, which does not come into force until 2020. Its six-cylinder diesel engine OM 656 for the first time has an additional SCR catalytic converter including an ammonia slip catalytic converter (ASC) in the underbody. As RDE measurements by independent testing institutes prove, the nitrogen oxide emissions drop thanks to this further developed technology in the GLE 400 d 4MATIC[17] (combined fuel consumption: 7.5-7.0 l/100 km; combined CO2 emissions: 199-184 g/km)[18] to on average around 20 milligram per kilometre, and in some individual drives even significantly less than this.
With a rating of 243 kW (330 hp) and 700 Nm, the GLE 400 d is the most powerful series-production diesel SUV ever offered by Mercedes-Benz. Most of the components relevant for efficient emissions reduction are installed directly on the engine. The integrated technology approach combining the new stepped-bowl combustion process, dynamic multi-path exhaust gas recirculation and near-engine emission control system, combined for the first time with variable valve-lift control, makes further reduced consumption with low emissions possible. Thanks to the near-engine insulated configuration, the emission control system has little heat loss and very favourable operating conditions. The measures taken include
- high- and low-pressure exhaust gas recirculation including cooling,
- a diesel oxidation catalytic converter (DOC) to avoid the emission of carbon monoxide (CO) and unburned hydrocarbons (HC),
- a particulate filter with SCR catalytic function (sDPF),
- an SCR catalytic converter (selective catalytic reduction) for reducing nitrogen oxides. For this purpose, ammonia in the form of the carrier AdBlue® is added to the exhaust gases before entering the sDPF,
- an additional selective catalytic reduction (SCR) converter with an ammonia slip catalyst (ASC) in the exhaust tract.
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SOURCE: Daimler
