Micro reciprocating piston internal combustion engines are potentially desirable for high-energy density micro power sources. However. complex subsystem functions hinder the downsizing of reciprocating piston internal combustion engines. The homogeneous charge compression-ignition (HCCI) combustion mode requires no external ignition system; it contributes to structural simplification ... https://ashleyshomestores.shop/product-category/compact-fridge/