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 waste exhaust energy and forcing more air into the engine at lower rpm. It concludes that turbochargers improve engine performance by increasing air intake into the combustion chamber.