https://www.google.com/#q=borboleta do acelerador (trotle va...

Below the venturi is a butterfly valve called the throttle valve — a rotating disc that can be turned end-on to the airflow, so as to hardly restrict the flow at all, or can be rotated so that it (almost) completely blocks the flow of air. This valve controls the flow of air through the carburetor throat and thus the quantity of air/fuel mixture the system will deliver, thereby regulating engine power and speed

http://en.wikipedia.org/wiki/Carburetor

Portuguese term (edited): se abrisse a borboleta do acelerador.

e.g.

Anyhow, who cares about what Tom Cruise is doing? Not like he would even know what to do if he opened up the throttle.
The Bugatti is able to free Xenu from the forcefield that holds him within the mountain, however, because it is so powerful.
http://forums.vwvortex.com/showthread.php?2598777-Tom-Cruise...

The Ultra Cycle was only racing at around half its maximum speed but, if he opened up the throttle any further, he wasn't going to risk setting the survivors on fire.
https://www.fanfiction.net/s/9182654/22/The-Ultra-Crystals-G...

if he gave it the gun