2009 Chevrolet Corvette C6.R: Direct Fuel Injection
Direct fuel injection — spraying gas straight into the cylinders, in contrast to conventional fuel injection, where gas is mixed with air before entering the engine — has been around since at least 1954, when Mercedes introduced the technology on its legendary 300SL "Gullwing" sports car. But it was difficult to do well and its use went fallow for decades. But recently it has become popular, as computerized engine controls allow precise fuel metering and combustion control, and the advantages of direct injection — cooler operating temperatures and better burn characteristics that allow higher compression ratios — can be exploited. GM's first use of direct injection was on the successful Corvette C6.R endurance racer during the 2009 season. "Motorsports play a key role for us in improving our street cars and power trains," GM Racing head Jim Campbell told CNBC as Chevrolet introduced the direct injection "LT1" 6.2-liter V8 in the 2014 Corvette production car. "[Racing is] a great place to train our engineers in an environment that's very demanding and very fast paced."