This method combines the optimized combustion of the engine in with a system of treatment the exhaust emissions, aiming the reduction of the level of pollutant emissions such as oxide of nitrogen (NOx).The basic factor of the procedure is the use of AdBlue®.

This dilution is sprayed in the exhausts before they reach the catalyst. The high temperature which occurs at that point converts AdBlue® into ammonia. Then; while ammonia and the inimical oxides of nitrogen pass through the catalyst, reacts with each other and converts into nitrogen and water vapours, two elements that are not harmful for the atmosphere.