Hannover Messe Industry

With high pressure to environmental protection

Fraunhofer LBF, /

In 2012, the share of diesel engines in the private car market reached a record high. For the first time, more cars with compression-ignition engines than gasoline-powered cars were sold. However, this means an enormous increase in nitrogen oxide emissions, which is bad for the environment. With the new HIPER Act piezo pump for injection of AdBlue, scientists of the Fraunhofer Adaptronics Alliance have found a new way to reduce nitrogen oxide emissions. This innovative technology was presented at this year’s Hanover Fair in April.

Pump demonstration with piezoelectric actuator

Nitrogen oxides are irritating to the respiratory system and are involved in the generation of acid rain, contribute to smog and ozone formation and accelerate global warming. For some years, AdBlue has been added to the exhaust gas in order to reduce nitrogen oxide emission. AdBlue is an aqueous urea solution for exhaust gas aftertreatment in SCR catalysts. But AdBlue is not just added to the diesel, but injected into the exhaust train.

High-dynamics piezo actuators reduce nitrogen oxide emissions

Researchers of Fraunhofer’s Adaptronics Alliance have developed a new pump based on piezo-ceramic actuators. It operates at very high pressures and thus generates much finer AdBlue droplets, resulting in significantly lower nitrogen emissions. The pump is very compact and suited even for trucks. Thanks to intelligent computer technology, it may be adapted to other applications without much cost and effort.