The document describes a proposed "green engine", which is an internal combustion engine designed for higher efficiency and lower emissions than traditional engines. The green engine has six phases rather than strokes, uses vanes and rotors rather than a piston, and has multiple modifications to its design. It is proposed as a solution to problems of energy crisis and environmental pollution from vehicle emissions. Key features include direct fuel injection, super-charged mixing of fuel and air, and a higher expansion ratio for increased power and efficiency while reducing emissions. Applications mentioned include use in vehicles, planes, and stationary engines.