The introduction of downsized engines is a key element of a powertrain strategy to meet future requirements for reduced carbon dioxide emissions and fuel consumption.
Ricardo have developed a number of alternative concepts for downsized DI gasoline engines, each seeking maximum indicated efficiency by maintaining high compression ratio, dilution and other measures.
Each concept has been experimentally investigated using a multi-cylinder turbocharged DI gasoline engines, and the most promising concept – Lean Boost DI (LBDI) – has been further developed with a demonstrator vehicle programme.