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  • Helios ACRO is a product of a new generation.
  • Helios ACRO is produced according to the requirements of ISO22241 and DIN70070.
  • Helios ACRO is 32,5% water solution of urea, which is certified in the Executive Agency “Certifying and testing“, according to ISO22241, DIN70070.
  • Helios ACRO is a trade mark registered by AIBO-C Ltd.
  • Download a PDF brochure of Helios ACRO


At the end of 1999 European parliament issued strict restrictions regarding fuming gases of the heavy-freight diesel vehicles. According to these new standards, the emissions of nitric oxides has been reduced in two stages: in May 2005 (EURO 4) and 2008 (EURO 5). The considerable decrease of the values affects on the other emissions: carbon oxide (CO), non burned hydrocarbons (HC), dust (PM).
 Emissions , g/kWh  EURO 3  EURO 4  EURO 5
 Nitric oxides (NOx)  5.0  3.5  2.0
Carbon oxide (CO)  2.0  1.5  1.5
 Non burned hydrocarbons (HC) )  0.66  0.46  0.46
 Dust(PM)  0.1  0.02  0.02
In order to respond to the high requirements of the standards, European producers of heavy-freight vehicles have chosen "selective catalytic reduction" method (SCR method). At this method, as a reduction agent is used 32.5% water solution of urea. This product can be Helios ACRO.

After the burning, the gases come out of the engine and pass through a catalyst, where non burned hydrocarbons, carbon oxide and hard particles additionally oxidize. After that a pump which is controlled by a special unit, sprays urea solution from a separate tank in the hot stream of fuming gases Urea is hydrolyzed to ammonia (NH3) and carbon dioxide (CO2). The ammonia reacts with NO/NO2 mixture and forms nitrogen and water /steam/. In this chemical reaction takes part a catalytic converter containing compounds of transition metals and ceramic carrier . Small quantities of non-participating ammonia can be oxidized in the next catalyst. When SCR technology is used, the engine works at optimum conditions and Helios ACRO achieves fuel economy up to 6 % and decrease of harmful emissions.


partial oxidizing        2NO + O2 --> 2NO2

hydrolysis of urea          (NH2)2CO + H2O --> 2NH3 + CO2

selective reduction      NO + NO2 + 2NH3 --> 2N2 + 3H2O


We can improve operational characteristics of the fuel and engine work if we use additives for diesel fuel HELIOS. Helios 13D and Helios 15D guarantee easier starting, exceptional dynamic, better burning, decrease of harmful emissions and lower fuel consumption.