Controlling HCCI ignition timing of biogas by direct injection of solid biomass

The reduction of pollutant emissions from internal combustion engines, and in particular greenhouse gases, must be achieved by optimizing the process choosing fuels with a low carbon impact. Heterogeneous mixture combustions such as Diesel induce difficulty managing pollutants formation even if its principle output efficiency remains favorable. Therefore, it is necessary to distinguish this last point, which refers compression ratio, order move towards homogeneous high ratio. We then speak generically HCCI (Homogeneous Charge Compression Ignition), whose takes place context auto ignition. An important challenge control ignition timing. This paper presents concept initiation reactive gas susceptibility auto-ignition, meets expectation efficiency, via introduction biomass particles. From schematic point view, these particles will play role spark plugs distributed throughout chamber, should have an time much lower than that fuel. For purpose, particle injector was conceived directly inject controlled quantity powder into directly. part challenging point. reproducibility viability were qualitatively validated image analysis acquired at frequency resolution. Thus, system integrated RCM (Rapid Machine) allowing diphasic gas/solid study. preliminary test investigated high-speed video on lean diluted enriched hydrogen (CH4/CO2/H2) fuel-air equivalence ratio (Φ = 0.6), different auto-ignition delays condition experimentation. It shown direct injection small amount able promote reactivity initiate process. study highlights promising effects beginning combustion, bringing locally spot energy, whole chamber. given global contribution weak energy distinguished fuel properties air-fuel or dilution complete optimization