Q) What new techologies are available?
There are a number of technologies available to help meet the new standards. The main ones you will hear being spoken about are as follows:
EGR: The main principle behind the technologies is Exhaust Gas Recirculation (EGR). The exhaust gases are treated before being expelled, with particulate matter (PM) and nitrogen oxides (NOx) being removed as part of the process.
DPF: A Diesel Particulate Filter (DPF) collects particulate matter (PM), oxidises it and removes it from the engine cycle.
SCR: Selective Catalytic Reduction (SCR) injects a benign chemical reagent into the exhaust gas flow and converts the nitrogen oxides (NOx) into harmless nitrogen and oxygen. In Europe, this reagent is called AdBlue and in the US, DEF (Diesel Engine Fluid).
Our engines will be using EGR/DPF technology, but not SCR at this stage.
Of course, these processes also require a finely tuned V-ACT engine and specialist fuels and lubricants. The third-generation Volvo EMS-2 (Engine Management System) constantly tunes the engine to ensure the processes are optimised, while ultra-low sulphur fuels and low-ash lubricating oils are essential for effective functioning.
Q) Are there further Stages and Tiers after this?
Yes, the programme of exhaust emission reduction began in 1996 and is set to be fully in place by the beginning of 2015.
For more information, click here to download a copy of "Exhaust Emissions Reduction".
Contact: Arvid Rinaldo