How do engines work with LPG?

Alternative fuels, hybrid and electric vehicles are becoming fashionable. One of these alternatives is the LPG (liquefied oil gas). Different brands already offer motorizations that work with this fuel and there are assembly kits to adapt vehicles with this alternative. I leave an article in which you talk about LPG and how vehicles that resort to this fuel work:
www.blogmecanicos.com/2014/07/el-gas-ggp...ble-alternative.html