Simulation of ECU in proteus for direct injection controlling flexible syngas-biogas-hydrogen blend in dual fuel engine

Direct injection through a twining injector system enables an increase in output power of dual-fuel engines, improves speed control capacity, and allows the engine to use flexible gaseous fuel blends of syngas-biogas-hydrogen with large variation of compositions. When the injection pressure is reduced from 5 bar to 3 bar, the start injection angle is advanced by 20°CA and the gauge pressure in the cylinder drops by 0.1 bar. In syngas fueling mode, with an injection pressure of 3.5 bar, to achieve f=0.75 at a crankshaft position of 250°CA, the start injection angles are 80°CA, 50°CA, and 25°CA corresponding to engine speeds of 2000 rpm, 2400 rpm, and 2800 rpm, respectively. The gauge pressure in the cylinder increases by 100%, 97%, and 79%, respectively, compared to natural aspiration fueling mode.