Abstract
Keywords:
Diesel Emissions Control, Diesel Particulate filter, Particulate matter, Fuel Borne Catalyst.
Abstract:
The use of a Fuel Borne Catalyst for diesel particulate filter regeneration combined with engine management is a proven technology with now about 2 Million diesel passenger cars equipped in Europe without any recall or failure since its introduction in 2000 [1-3]. Based on this large field experience several improvements have been identified to optimize the global DPF system and particularly to extend the maintenance interval, decrease the overall cost and reach an efficient fit for life solution. For that a global system approach was needed meaning jointdevelopments between all the different suppliers involved in the DPF system.
Concerning the Fuel Borne catalyst Rhodia has recently developed its third generation of product, more concentrated and based on the use of iron-based nanoparticles leading to a higher catalytic oxidation activity and thus allowing a reduction of the dosing rate and the embarked volume. While providing a full and complete regeneration the new FBC still maintains reasonable exothermal peaks during DPF regeneration and acceptable ash density. On another side the on board dosing system has also been optimised with a complete new architecture and a new dosing pump with high accuracy allowing a better vehicle integration and simplification of filling operations.
To conclude the combination of Eolys 3rd generation with the new dosing system as well as new filter designs lead to a global system approach offering a fit for life solution for diesel passenger cars with durability improvement (240000 Km without maintenance), better vehicle integration and costs reduction. The advantages of the combination DPF + FBC offer many opportunities of positioning in other market segments than passenger cars. This paper also presents latest developments on heavy duty vehicles as well as on retrofit applications on public transportations, commercial vehicles, off road and power stations.
Additionally the Fuel borne catalyst can be used in combination with alternative filter technologies such as coated soot filters by improving their efficiency, durability and limiting fuel over consumptions.
Finally other possibilities of FBC integration will be tackled in view of the new coming standards Euro V and Tier 2 bin 5 in the US where the filter will be combined with NOX abatement technologies making the overall thermal management more and more challenging.