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Encyclopedia > Throttle

In an engine, the throttle is the mechanism by which the engine's power is increased or decreased. Throttle may refer to both the part inside the engine which directly regulates the fuel flow, but it can also include the human controls (pedal, lever, electronic) that the operator uses to indirectly control an engine's power. An engine is something that produces some effect from a given input. ...

Internal combustion engines

In an internal combustion engine, the throttle is a valve that directly regulates the amount of air entering the engine, and indirectly controls the amount of fuel, and thus regulates the engine speed. In a vehicle, the control that human operators use may be refered to as a 'gas pedal' or 'accelerator'. Image File history File links USPatent6518683. ... A colorized automobile engine The internal combustion engine is a heat engine in which the burning of a fuel occurs in a confined space called a combustion chamber. ...

In larger ICE engines, the throttle is typically a butterfly valve. When a throttle is wide open, the intake manifold is usually at ambient atmospheric pressure. When the throttle is partially closed, a manifold vacuum develops as the intake drops below ambient pressure. A Butterfly valve is a type of flow control device, used to make a fluid start or stop flowing through a section of pipe. ... Wide Open Throttle (WOT) refers to an internal combustion engines maximum intake of air and fuel that occurs when the throttle plates inside the carburetor or throttle body are wide open, providing the least resistance to the incoming air. ... Manifold vacuum or engine vacuum is a phenomenon found in internal combustion engines burning petroleum on the Otto Cycle, where incoming air is channeled in such a way as to create a reduction in air pressure (a vacuum). ...

In a fuel-injected engine, the throttle valve is housed in the throttle body. In a carbureted engine, it's found in the carburetor. The examples and perspective in this article or section may not represent a worldwide view. ... Fuel injection is a technology used in internal combustion engines to mix the fuel with air prior to combustion. ... Stromberg side-draft carburetor The carburetor (American spelling, a. ...

Usually the throttle valve is mechanically linked with the throttle pedal or lever. In vehicles with electronic throttle control, the throttle valve is electronically controlled, which allows the ECU greater possibilties in reducing air emissions. Electronic throttle control (ETC) is an automobile technology which severs the direct link between the accelerator pedal and the throttle. ... An Engine Control Unit (ECU) is an electronic device, fundamentally a computer, that is part of an internal combustion engine, which reads several sensors in the engine and uses the information to control the ignition systems of the engine. ...

Other engines

Most engines have some kind of throttle control, though the particular way that power is regulated is often different. An engine is something that produces some effect from a given input. ...

Liquid rockets are throttled by controlling the pumps which send liquid fuel and oxidizer to the combustion chamber. Solid rockets are more difficult to throttle, but some may have mechanisms for this. Rockets are classified by the propellant used in their engines. ... The Space Shuttle Columbia is initially launched with the help of solid-fuel boosters Solid rockets are rockets with a motor that uses solid propellants (fuel/oxidizer). ...

In a jet engine, engine output is also directly controlled by changing the amount of fuel flowing into the combustion chamber, usually with an autothrottle. A Pratt and Whitney turbofan engine for the F-15 Eagle is tested at Robins Air Force Base, Georgia, USA. The tunnel behind the engine muffles noise and allows exhaust to escape. ... An autothrottle (automatic throttle) allows the pilot to control the power setting of an of an aircrafts engines automatically. ...

  Results from FactBites:
EbikesNW: Throttle or Pedal Activation (566 words)
On occasion prospective customers assume that throttle control is "better", while our actual experience has shown that when the pedal-activated system is actually experienced it is often favored by cyclists.
And, unless the objective is to not move your legs at all (a curious one for a cyclist) you need only to pedal very lightly for the power to stay on with a pedal-activated bike.
A throttled bike needs to be pedalled concurrently with the motor on a steep hill—of course, depending on what constitutes a "steep" hill, the power of the bike, the weight of the rider etc.
IntrArts Creative Media - throttled (707 words)
I have included several sample configuration files and prepped this release to be included with Throttled Pro 1.1.
03/24/04 - throttled 0.3.1 is a minor release that allows you to change the TTL of iTunes packets with the -T flag.
throttled now catches all file transfers without any configuration thanks to a new ipfw rule style from the minds of wincent.org.
  More results at FactBites »



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