throttle

throttle
—throttler, n.
/throt"l/, n., v., throttled, throttling.
n.
1. Also called throttle lever. a lever, pedal, handle, etc., for controlling or manipulating a throttle valve.
3. the throat, gullet, or windpipe, as of a horse.
4. at full throttle, at maximum speed.
v.t.
5. to stop the breath of by compressing the throat; strangle.
6. to choke or suffocate in any way.
7. to compress by fastening something tightly around.
8. to silence or check as if by choking: His message was throttled by censorship.
9. Mach.
a. to obstruct or check the flow of (a fluid), as to control the speed of an engine.
b. to reduce the pressure of (a fluid) by passing it from a smaller area to a larger one.
[1350-1400; (v.) ME throtelen, freq. of throten to cut the throat of (someone), strangle, deriv. of THROAT; (n.) prob. dim. of ME throte THROAT; cf. G Drossel]

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Valve for regulating the supply of a fluid (as steam) to an engine, especially the valve controlling the volume of vaporized fuel delivered to the cylinders of an internal-combustion engine.

In an automobile engine, gasoline is held in a chamber above the carburetor. Air flows down through the throat of the carburetor, past the throttle valve, and into the intake manifold. A throat is formed by the reduced diameter, and acceleration of the air through this smaller passage causes a decrease in pressure related to the amount of air flowing. This decrease in throat pressure results in fuel flow from the jet into the airstream. Any increase in airflow caused by change in engine speed or throttle position increases the pressure differential acting on the fuel and causes more fuel to flow. See also venturi tube.

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Universalium. 2010.

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  • Throttle — Throt tle, n. [Dim. of throat. See {Throat}.] 1. The windpipe, or trachea; the weasand. Sir W. Scott. [1913 Webster] 2. (Steam Engine) The throttle valve. [1913 Webster] {Throttle lever} (Steam Engine), the hand lever by which a throttle valve is …   The Collaborative International Dictionary of English

  • Throttle — Throt tle, v. t. [imp. & p. p. {Throttled}; p. pr. & vb. n. {Throttling}.] 1. To compress the throat of; to choke; to strangle. [1913 Webster] Grant him this, and the Parliament hath no more freedom than if it sat in his noose, which, when he… …   The Collaborative International Dictionary of English

  • throttle — [thrät′ l] n. [prob. dim. of THROAT: see LE] 1. Rare the throat or windpipe 2. a valve that regulates the flow of fluids; esp., a butterfly valve that controls the release of fuel vapor from a carburetor, or the control valve in a steam line:… …   English World dictionary

  • throttle up — ˌthrottle ˈup [intransitive] [present tense I/you/we/they throttle up he/she/it throttles up present participle throttling up past tense …   Useful english dictionary

  • throttle — (v.) strangle to death, c.1400, probably from M.E. throte throat (see THROAT (Cf. throat)). The noun, in the mechanical sense, is first recorded 1870s, from throttle valve (1824), but was used earlier as a synonym for throat (1540s); it appears… …   Etymology dictionary

  • throttle — ► NOUN 1) a device controlling the flow of fuel or power to an engine. 2) archaic a person s throat, gullet, or windpipe. ► VERB 1) attack or kill by choking or strangling. 2) control (an engine or vehicle) with a throttle. ORIGIN perhaps from …   English terms dictionary

  • Throttle — Throt tle, v. i. 1. To have the throat obstructed so as to be in danger of suffocation; to choke; to suffocate. [1913 Webster] 2. To breathe hard, as when nearly suffocated. [1913 Webster] [1913 Webster] …   The Collaborative International Dictionary of English

  • throttle — index occlude, shut, stifle Burton s Legal Thesaurus. William C. Burton. 2006 …   Law dictionary

  • throttle — vb *suffocate, asphyxiate, stifle, smother, choke, strangle …   New Dictionary of Synonyms

  • throttle — [v] choke burke, control, gag, inhibit, silence, smother, stifle, strangle, strangulate, suppress; concept 191 Ant. free, release …   New thesaurus

  • Throttle — A throttle is the mechanism by which the flow of a fluid is managed by constriction or obstruction. An engine s power can be increased or decreased by the restriction of inlet gases ( i.e., by the use of a throttle). The term throttle has come to …   Wikipedia

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