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Porsche 911 Carrera 4S
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With direct injection fueling its 3.8 liter engine, the 911 Carrera 4S engine management system regulates injection timing individually for each cylinder as well as the injection rate for each cylinder bank. This improves the combustion process and fuel economy.
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Direct fuel injection (DFI) improves the internal cooling of the combustion chambers by having the fuel-air charge mixed directly inside each cylinder. This allows a higher compression ratio, which extracts more energy from the fuel, increases power output, and enhances engine efficiency, all at the same time.
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