Direct fuel injection is one of the key enabling technologies behind Ford’s EcoBoost™.
Paired with turbocharging, direct injection gives the new 3.5-liter EcoBoost engine in the Lincoln MKS the power and torque of a 4.6-liter V-8 with the fuel economy of a V-6. The direct injection technology helps Ford’s EcoBoost deliver advancements of up to 20 percent better fuel economy.
As well, EcoBoost is more Earth-friendly, as it helps reduce CO2 emissions. Direct injection uses high-pressure fuel injectors to spray a fine mist of fuel directly into each cylinder. This precisely controlled fuel delivery improves the engine’s transient response and enables improved emissions, particularly at cold start. The EcoBoost engine cuts CO2 emissions by 15 percent.
Unlike port-fuel-injection (PFI) engines that spray fuel in the intake system, the direct injection system puts the fuel exactly where it needs to be for combustion, making it easier to ignite and burn completely, allowing for improved fuel efficiency. Much like a fine-mist atomizer bottle one might use to keep cool in the summer, the mist generated by the direct injection uses its cool to chill engine intake air, which, in addition to improving fuel economy, also reduces the potential for engine knock.
Quotes
“Direct injection is a significant player in Ford’s strategy to replace larger engines with smaller EcoBoost engines, improving fuel economy by up to 20 percent without sacrificing performance. We’re going to be deploying direct injection to bring a wave of EcoBoost engines into Ford Motor Company products. It starts with the Lincoln MKS and by 2013 more than 90 percent of our North American lineup will offer EcoBoost technology.”
- Brett Hinds, EcoBoost Design Manager
“Cool air is good for an engine because it minimizes the engine knocking phenomenon. Anything you can use to cool the air is good. Injecting the fuel into the cylinder, you cool it on the spot, where you’re going to burn it. Fuel vaporization during the intake stroke cools the air, improving the volumetric efficiency, the breathing of the engine and the knocking tendency.”
- Corey Weaver, EcoBoost Project Leader
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