This paper presents the research results on an innovative concept of a twining injector system to supply a flexible syngas-biogas-hydrogen blend for engines working in a hybrid solar-biomass renewable energy system. The effects of nozzle diameter, injection pressure and nozzle location were considered. Simulation results showed that the twining injector system, including 2 injectors with a nozzle diameter of 5 mm located close to the inlet port and 1-bar injection pressure is suitable for Honda GX200 engine fueled with syngas-biogas-hydrogen. At engine speed of 3000 rpm, for syngas-biogas blend, the injection duration of the first injector is reduced from 120 CA to 23 CA while the second injector keeps the injection duration stable at 120 CA to 50% biogas, then reduced to 74 CA for full biogas injection. For syngas-hydrogen blend, the first injector keeps the stable injection duration of 120 CA to 50% hydrogen, then gradually decreases to 44 CA, corresponding to 100% hydrogen; the injection duration of the second injector decreases from 120 CA to 24 CA and then keeps constant until hydrogen content reaches 70%. The injection duration of each injector for syngas-biogas-hydrogen blend is within the limits between the injection duration of the syngas-biogas and that of the syngas-hydrogen blends. The mixture of syngas-biogas-hydrogen blend and air in the combustion chamber created by twining injector system was more homogeneous than that created by traditional port fuel injection system.

本文介绍了关于双喷射器系统创新概念的研究结果，该系统可为在混合太阳能-生物质可再生能源系统中工作的发动机提供灵活的合成气-沼气-氢混合物。考虑了喷嘴直径、注射压力和喷嘴位置的影响。仿真结果表明，双喷油器系统包括 2 个喷嘴直径为 5 mm 的喷油器，靠近进气口，喷射压力为 1 bar，适用于以合成气-沼气-氢为燃料的本田 GX200 发动机。在发动机转速为 3000 rpm 时，对于合成气-沼气混合物，第一个喷射器的喷射持续时间从 120 CA 减少到 23 CA，而第二个喷射器将喷射持续时间稳定在 120 CA 到 50% 沼气，然后减少到 74 CA用于完全注入沼气。对于合成气-氢气混合物，第一喷油器保持120CA到50%氢气的稳定喷油时间，然后逐渐降低到44CA，对应100%氢气；第二个喷油器的喷油持续时间从120 CA下降到24 CA，然后保持恒定，直到氢含量达到70%。合成气-沼气-氢气混合物的每个喷射器的喷射持续时间在合成气-沼气和合成气-氢气混合物的喷射持续时间之间的限制内。双喷油器系统在燃烧室中产生的合成气-沼气-氢气混合物与空气的混合物比传统进气道燃油喷射系统产生的混合物更均匀。第二个喷油器的喷油持续时间从120 CA下降到24 CA，然后保持恒定，直到氢含量达到70%。合成气-沼气-氢气混合物的每个喷射器的喷射持续时间在合成气-沼气和合成气-氢气混合物的喷射持续时间之间的限制内。双喷油器系统在燃烧室中产生的合成气-沼气-氢气混合物与空气的混合物比传统进气道燃油喷射系统产生的混合物更均匀。第二个喷油器的喷油持续时间从120 CA下降到24 CA，然后保持恒定，直到氢含量达到70%。合成气-沼气-氢气混合物的每个喷射器的喷射持续时间在合成气-沼气和合成气-氢气混合物的喷射持续时间之间的限制内。双喷油器系统在燃烧室中产生的合成气-沼气-氢气混合物与空气的混合物比传统进气道燃油喷射系统产生的混合物更均匀。