throttle

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Related to throttling back: throttle down

throttle

1. any device that controls the quantity of fuel or fuel and air mixture entering an engine
2. an informal or dialect word for throat

Throttle

 

a device whose cross section is considerably smaller than that of the pipeline leading to it. A throttle regulates the flow rate and changes other parameters (temperature, humidity, and superheating) of a working body flowing in a closed channel.

Throttles are mounted in front of a steam turbine to control loading by throttling the steam; in high-pressure steam lines they are used to reduce pressure at the point where the steam enters a low-pressure steam line (for example, in heating systems). They are also used in compressors and blowers to decrease the pressure of the gas at the intake and in refrigerators to expand the compressed gas in order to cool it. One type of throttle is an accelerator, which controls the supply of the fuel mixture to the cylinders of internal-combustion engines.

throttle

[′thräd·əl]
(mechanical engineering)

throttle

The control in an aircraft engine that regulates the power or thrust the pilot desires the engine to develop. It is basically a control unit, which controls the amount of fuel or the fuel-air mixture that can enter the engine. It is controlled by a throttle lever in the cockpit. This lever is referred to colloquially as a throttle. Also called a power lever or a thrust lever. See throttle friction nut.

throttle

To cause something to slow down or speed up. When automobiles first emerged at the turn of the 20th century up until the 1940s, they used to have a throttle. It was a lever that increased the engine speed as it was pulled out. See CPU throttling, throttled transfer and bandwidth throttling.
References in periodicals archive ?
Rowena Simpson added: "The effects of the economic downturn are being felt everywhere, but while many companies are throttling back, we have total confidence in our product and are determined to continue the growth of the Giraffe brand in 2009.
And sometime the quickest path forward involves throttling back a little, slowing down, and getting out of the firehose's stream.
Throttling back a high-speed machine to run such materials is an inefficient use of the extra investment.
I was throttling back when I got in close, and the bow-wave was moving the basket all over the place.
As they came back toward the launching ramp, we could see the operator trying to the get the motor to shift, but had apparently forgotten the part about throttling back before attempting to shift.
There has even been merchant pig made available from North American blast furnaces that are now pigging excessive hot metal instead of "beaching" the iron or throttling back the blast furnaces.