A contribution to Innovation and environmental technologies 

A diesel engine with no emissions of particulate matter nor oxides of nitrogen

Our Inergy Automotive Systems joint venture is working on technologies for a clean diesel engine that does not release particulate matter, nor emissions of nitrogen oxides.

When compared with a gasoline engine, a diesel engine releases little CO2, but it does produce fine particles and oxides of nitrogen (NOx), which are toxic to health and to the environment. To meet the challenge, Inergy Automotive Systems, in collaboration with partners, has developed the DINOX system, involving on-board storage and injection into the exhaust gases of a urea-based additive which ensures the selective reduction of NOx.

Also, the particle filter that stops fine dust can be regenerated by combustion in the filter itself once the additive, produced by Rhodia, is added to the fuel.

Inergy has developed a storage system, and a high-pressure pump able to automatically inject minute quantities of the concentrated additive each time the tank is filled with diesel fuel. The automotive industry’s demand is high enough for Selective Catalytic Reduction (SCR) systems to start being produced in 2008, which is two years earlier than initially envisaged.