|The M9R diesel.|
Nissan Motor will showcase an X-TRAIL diesel prototype featuring the 2.0-liter M9R diesel engine at the 2008 Integrated Exhibition of the Environment in Hokkaido (19-21 June) as well at the G8 Hokkaido Toyako Summit’s International Media Center (7-9 July).
Japan is slated to introduce its new emission regulatory standards—“Post New Long-term Regulations”—for all new vehicles starting in October 2009, and all replacement / imported models in September, 2010. Nissan plans to introduce the X-TRAIL diesel, which will comply with the more stringent standards, in September—ahead of the regulations’ implementation.
The 2009 diesel regulations, while maintaining the current requirements for CO and HC, further reduce the NOx and PM standards. The permitted NOx level drops from 0.15 g/km under the New Long Term regulations to 0.08 g/km under the Post New Long Term regime. Acceptable PM levels decrease from 0.014 g/km to 0.005 g/km. These levels for 2009 in Japan are equivalent to the coming Euro 6 levels targeted for 2014. (The permitted NOx levels remain higher than that of US BIN 5/ LEV2.)
The new diesel is based on the M9R diesel engine co-developed with Alliance-partner Renault (the Renault version is the 2.0 dCi, as applied in the new Laguna, Scénic II, Mégane II, Vel Satis and Espace). Technology applied on the engine includes:
- Piezo-electric-controlled injectors;
- Common rail system (1,600 bar);
- Variable nozzle turbos;
- Double swirl ports to allow better efficient mixture of air and fuel;
- Diesel particulate filters (DPF);
- Lean NOx-trap catalysts; and
- Control-system for precise modulation of the DPF and catalysts in tandem with the driving conditions.
Nissan is also developing an advanced diesel powertrain that includes a new HC-NOx trap for emissions control that may be able to meet California’s standard for super-ultra-low emission vehicles (SULEVs). To meet the SULEV standards, hydrocarbons (NMOG) in vehicle emissions must be exhaust reduced by about 90% and NOx levels must be reduced by 70% versus US Tier2 Bin5 and California LEV standards. (Earlier post.)