What are the disadvantages of green engine?

Abstract

Green engine is one of the most interesting discoveries of the new millenium. There are some unique features that have been used in the manufacture of engines for the first time. This engine has a piston with features like sequential variable compression ratio, direct air intake, direct fuel injection, multi-fuel usage etc. Compared to the contemporary engine, this engine has more efficiency and exosphere emissions are close to zero. The significance of the engine lies in efficiency, when the situation of the limited resources of energy in the current world is considered. Engine prototypes have been developed. The generator is made with green engine. The United Nations Energy Organization designates them all as "primary energy", as well as "conventional energy". Electricity is the only "second energy" obtained from these sources. Currently, energy consumption in the whole world depends on the supply of almost five main energy sources. Petroleum consumption uses about 60 percent of the energy from all sources, so it is the main consumer of energy