Pirelli's most green technology to reduce emissions from diesel engines is a combination of SCR technology, for the reduction of Nitrogen Oxides (NOx) which is one of the major pollutants in the air, Hydrocarbons (HC) and Carbon Monoxide (CO) and of DPF technology which reduces Particulate Matter (PM).

Thanks to the combination of SCR and DPF Technology FEELPURE™ DOWNOX™ allows EURO II-III-IV vehicles to meet EURO V for all regulated emissions.

• Recrystallized silicon carbide substrate with unique resistance characteristics to high temperature, corrosion and mechanical stress
• Unique SCR-DPF technology  that places the catalyser in front of the DPF with exclusive advantages over similar technologies :

HIGHER NOX REDUCTION
LONGER LIFE OF THE CATALYSER
EXCELLENT SOLUTION FOR URBAN APPLICATIONS

• Emission reduction of Particulate Matter (PM) by over 95% and up to 99.7% of Particles Number (PN) (Source: JRC of Ispra -  Joint Research Centre of the European Community);
• Emission reduction of Nitrogen Oxides (NOx) by over 85%
• Emission reduction of NO2/NOx ratio by over 70%; SCR technology, through the process of catalytic reduction, guarantees a high reduction NO2, the most toxic component of NOx emissions.
• EURO V level for all emissions

• A dedicated distribution and assistance network all over Europe (more than 1000 installers) and in China, Brazil and Chile.

Thanks to the FEELPURE™ AR technology, the optimal DPF solution for urban applications, FEELPURE™ DOWNOX™ is the unique SCR-DPF technology that places the catalyser unit in front of the DPF with explicit advantages over similar technologies:

• HIGHER NOX REDUCTION  thanks to the higher temperature of the exhaust gases in the SCR module;
• LONGER LIFE OF THE CATALYSER mounted before the DPF/regeneration process and being protected from temperature stress
• EXCELLENT SOLUTION FOR URBAN APPLICATIONS: the system burns the particles at lower temperatures then usually requested.

FEELPURE™ DOWNOX™ is composed of:

SCR MODULE

• Catalyser for the reduction of Nitrogen Oxides (NOx)
• UREA dosing Unit

DPF MODULE
FEELPURE™ DOWNOX™, for PM emissions reduction, integrates the FEELPURE™ AR (Aided Regeneration) technology, the optimal DPF solution for urban applications characterized by very low temperature exhaust gases.

FEELPURE™ AR is the advanced aided regeneration technology developed by the engineers of the Pirelli Group for urban and Stop & Go applications with low exhaust gas temperatures.
The aided regeneration consists in introducing external energy into the system (glow-plugs) to start the combustion of the sooth trapped into the filter from 160°C.

FEELPURE™ DOWNOX™ combines peak performance in terms of environmental reductions with an ultra-compact system architecture that minimises the issues involved in installation and maintenance.
The compact size and generally limited space available to install extra components are common features in urban vehicles and FEELPURE™ DOWNOX™ technology has been principally designed with this in mind.
Pirelli research and development has therefore designed:

• EXHAUST MODULE: The FEELPURE™ DOWNOX™ exhaust module groups the SCR catalyst and DPF filter into a single, ultra-compact assembly. The module is then adapted according to the specific mechanics of the vehicle in order to optimise not only the fluid dynamics of the gases, but also to ease installation and maintenance.
• ECU/TANKS MODULE: Pirelli R&D has developed the concept of the TECH_BOX, a single box that groups together all the electronic components of the ECU system  for the continuous diagnosis of the DPF and SCR modules and the UREA and CAM FBC tanks necessary for SCR and DPF. This allows easy installation and rapid access for diagnosis and maintenance.

FEELPURE™ DOWNOX™ allows EURO II-III-IV vehicles to meet EURO V for all regulated emissions:

• Over 95% reduction of Particulate Matter (PM), 99,7% PN (Particles Number);
• Over 85% reduction of Nitrogen Oxides (NOx).
• Over 70% reduction of  NO2/NOx  ratio: SCR technology, through the process of catalytic reduction, guarantees a high reduction NO2, the most toxic component of NOx emissions.
• Emissions Standard EURO V for Hydrocarbons (HC) and Carbon Monoxide (CO).

Source: TUV NORD.

The FEELPURE™ DOWNOX™ exhaust module groups the SCR catalyst and DPF filter into a single, ultra-compact assembly. The module is then adapted according to the specific mechanics of the vehicle in order to optimise not only the fluid dynamics of the gases, but also to ease installation and maintenance.

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