In article <email@example.com>,
> and what do these actuator valves do!?what's the function of this star
> wars creation of science?besides cost!!
At low RPM's, the butterfly valve closes, allowing only one intake
valve gets air. This promotes lots of swirl in the combustion chamber,
which helps reduce emissions, increases torque a bit, and help improve
fuel economy. At higher RPM's, the butterfly valve opens, allowing both
intake valves to breath. This allows the engine to generate more power.
On the early 2.5L version in the Contour/Mystique, this opening gave
almost a 'turbo boost' effect during heavy accelleration. Later versions
do a better job of smoothing the transition.
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