General view (top view) of the electronic control unit: 1 – on / off button of power supply; 2 – button 0 of mineral fuel feed (DF100%); 3 – button 1 of the fuel composition (Camoil 10% + DF90%); 4 – button 2 of the fuel composition (Camoil 25% + DF75%); 5 – button 3 of the fuel composition (Camoil 50% + DF50%); 6 – button 4 of the fuel composition (Camoil 75% + DF25%); 7 – button for fixing the fuel composition; 8 – digital electronic display; 9 – fixation mode; 10 – fuel composition.