Direct fuel injection was finally gaining traction in mainstream cars by 2009. The innovation, which shoots fuel into engine cylinders at extremely high pressures, brought with it the benefits of more precise fuel metering, for better efficiency and power, as well as reduced combustion temperatures that allowed for higher combustion ratios.
“Delivering fuel to the fire was every early engine designer’s worst headache. After more than a century of these headaches, an ideal means of getting fuel to the fire is finally gaining production applications. Direct injection-squirting pressurized fuel straight into each cylinder-is the key to keeping internal-combustion engines relevant in the future.”