Twin turbochargers enable EcoBoost™ to punch above its size in terms of power and responsiveness.
The “boost” of Ford’s new EcoBoost engine technology comes from two small devices the size of an orange. Twin turbochargers harness exhaust gas to pump V-8 power out of the smaller-displacement EcoBoost™ V-6 engine. This technology – in conjunction with direct fuel injection – allows EcoBoost to punch above its size in terms of power and responsiveness.
The EcoBoost V-6 is the first application of smaller twin turbos in a Ford, rather than one larger one. This is to fight turbo lag, the tendency for previous generation turbocharged engines to have hesitation at low engine revs while the turbocharger spooled up to its operating speed.
Sophisticated electronic controls balance boost and torque levels to give the driver the feeling of continuous torque delivery, without turbo “whines” and “whooshes” that characterized some previous-generation turbo engines. As a result, the driver never notices the turbocharger operation.
The EcoBoost turbo system runs at very high temperature, up to 950 degrees Celsius (1,740 degrees Fahrenheit). An air-to-air intercooler is used to cool the compressed intake air before it enters the combustion chamber, and water cooling protects the internal turbo bearings in the high-temperature operating environment.
The EcoBoost has responded robustly in both engine dynamometer test labs and in real world environments ranging from high-temperature conditions to cold conditions down to minus 40 degrees Fahrenheit. Drivability, cold starts, high-altitude running and trailer towing were validated, and the Ford EcoBoost V-6 performed effortlessly in the place a V-8 engine would once have been.
Quotes
“A turbo is basically a large air pump. Increasing the mass of air in the engine increases its power output, and that’s why it’s called ‘boost.’ ”
- Craig Stephens, EcoBoost Powertrain Control System Manager
“EcoBoost gives the driver a very linear torque response. You get peak torque across a very wide engine speed range – usable performance that’s available to you when you pull away from a stoplight or pass someone on a secondary road. You don’t need to wind the engine out to get performance out of it. It’s there all the time.”
- Corey Weaver, EcoBoost Project Leader
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