First Drive: Falcon Ecoboost

[jpd80]

Originally Posted by chevypower

the shutdown technology minimizes air and fuel intake when it shuts down half of its cylinders, but it does not gain efficiency because all of the parts are still moving. You are right that if the turbos do not spool, the engine will not suck in as much fuel. The smaller turbo engine is more efficient because you do not waste as much energy moving bigger pistons up and down. With the EcoBoost, the if the rpm were equal to a non turbo version of the same engine, the EcoBoost would consume more fuel with the turbos spooling. But to get the same power, less rpm would be needed. On the EcoBoost, the turbos help with low-end torque with minimal throttle input.

Variable displacement is key here,
Ford's research shows that 80% of running is done at less than 50% throttle opening so most of the
timean Ecoboost 2.0 can be run at light throttle on Miller cycle and behave like a Hi Comp 1.4 or 1.6
but it can equally re size itself to become the equivalent of a 3.5 V6 when needed.

Unlike older turbo engines with less sophisticated technology, Ecoboost engines don't need t0
as run rich at part boost for detonation protection, the new software programming does that
by using the VCT, Injection timing/phasing and increased EGR so at part throttle, it's like a diesel..