This document discusses turbochargers and provides information about how they work. It explains that a turbocharger uses exhaust gas from the engine to power a turbine, which spins an air compressor to force more air into the engine. This allows the engine to burn more fuel and produce more power. The document also notes that turbochargers can increase fuel efficiency by recovering wasted energy from the exhaust. It concludes by stating that turbochargers improve engine performance by compressing more air into each cylinder.