The metal piece is a vibration carrier that leads to the excitation of a plasma formation in the fuel (in the combustion chamber).
This means that the fuel is pretreated in such a way that it is broken down into ionized gas chains, resulting in ideal conditions for optimum combustion and clean exhaust gases. Fuels such as gasoline and diesel are hydrocarbons that contain not only C-H bonds but also C-C bonds. No oxygen O can attach to the C-C bonds, so these bonds are found in the exhaust gas as soot (carbon). The "BE-Fuelsaver" splits the C-C bonds in the fuel, and the two Cs can now form additional bonds with the oxygen O. The additional bonds with oxygen increase the combustion performance of the engine in the combustion chamber due to the higher gas content. If one drives at a constant speed under identical ambient conditions or in a constant cycle, the fuel consumption decreases when using the "BE-Fuelsaver". Due to the increased amount of oxygen during combustion, the CO content can be reduced; the reduction of particulate matter in the exhaust gas can be measured in any case.