Throttle - Revision history

Red marquis: /* Environmental aspects */

2009-06-02T09:27:57Z

Environmental aspects

← Older revision		Revision as of 09:27, 2 June 2009
Line 26:		Line 26:
	Regulation of the throttle is also a mechanism for controlling engine exhaust emissions. In many modern internal combustion engines an electronic throttle is used, eliminating the older accelerator cable.<ref>Victor Albert Walter Hillier and Peter Coombes, ‘'Hillier's Fundamentals of Motor Vehicle Technology'‘, 2004, 544 pages ISBN 0748703179</ref>		Regulation of the throttle is also a mechanism for controlling engine exhaust emissions. In many modern internal combustion engines an electronic throttle is used, eliminating the older accelerator cable.<ref>Victor Albert Walter Hillier and Peter Coombes, ‘'Hillier's Fundamentals of Motor Vehicle Technology'‘, 2004, 544 pages ISBN 0748703179</ref>

	Throttle application via the accelerator pedal also results in increased sound emission from the engine. At lower operating speeds this component of [[roadway noise\|vehicle noise]] is prominent, contrasted with higher operating speeds, for which [[aerodynamic]] and [[tire]] noise are more significant.<ref>[http://www.springerlink.com/content/x1707075n815g604/ C..Michael Hogan, '' Analysis of Highway Noise'', Journal of Water, Air, & Soil Pollution, Vol. 2, No. 3, Biomedical and Life Sciences and Earth and Environmental Science Issue, pages 387-392, Sept., 1973, Springer Verlag, Netherlands ISSN 0049-6979]</ref>		Throttle application via the accelerator pedal also results in increased sound emission from the engine. At lower operating speeds this component of [[roadway noise\|vehicle noise]] is prominent, contrasted with higher operating speeds, for which aerodynamic and [[tire]] noise are more significant.<ref>[http://www.springerlink.com/content/x1707075n815g604/ C..Michael Hogan, '' Analysis of Highway Noise'', Journal of Water, Air, & Soil Pollution, Vol. 2, No. 3, Biomedical and Life Sciences and Earth and Environmental Science Issue, pages 387-392, Sept., 1973, Springer Verlag, Netherlands ISSN 0049-6979]</ref>

	[[Category:Technology]]		[[Category:Technology]]

Red marquis: /* Internal combustion engines */

2009-06-02T09:27:30Z

Internal combustion engines

← Older revision		Revision as of 09:27, 2 June 2009
Line 8:		Line 8:
	The throttle is typically a [[butterfly valve]]. In a [[fuel injection\|fuel-injected]] engine, the throttle valve is housed in the [[throttle body]]. In a carbureted engine, it is found in the carburetor.		The throttle is typically a [[butterfly valve]]. In a [[fuel injection\|fuel-injected]] engine, the throttle valve is housed in the [[throttle body]]. In a carbureted engine, it is found in the carburetor.

	When a throttle is [[wide open throttle\|wide open]], the intake [[Manifold (automotive engineering)\|manifold]] is usually at ambient atmospheric pressure. When the throttle is partially closed, a [[manifold vacuum]] develops as the intake drops below ambient pressure.		When a throttle is [[wide open throttle\|wide open]], the intake [[Manifold (automotive engineering)\|manifold]] is usually at ambient atmospheric pressure. When the throttle is partially closed, a manifold vacuum develops as the intake drops below ambient pressure.

	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 [[Engine Control Unit\|ECU]] greater possibilities in reducing air emissions.		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 [[Engine Control Unit\|ECU]] greater possibilities in reducing air emissions.

	In a reciprocating-engine aircraft, the throttle control is usually a hand-operated lever or knob. It controls the engine power, which may or may not reflect in a change of RPM, depending on the ~~[[Propeller#Aviation\|~~propeller]] installation (fixed-pitch or [[constant speed ~~propeller\|constant speed]]~~).<ref>{{cite web		In a reciprocating-engine aircraft, the throttle control is usually a hand-operated lever or knob. It controls the engine power, which may or may not reflect in a change of RPM, depending on the propeller installation (fixed-pitch or constant speed).<ref>{{cite web
	\| title = Chapter 6: Aircraft Systems		\| title = Chapter 6: Aircraft Systems
	\| work = Pilot's Handbook of Aeronautical Knowledge		\| work = Pilot's Handbook of Aeronautical Knowledge
Line 21:		Line 21:
	\| accessdate = 2009-02-09 }}</ref>		\| accessdate = 2009-02-09 }}</ref>

	Because [[diesel engine]]s use compression ignition, they do not need to control air volumes or mixture (indeed this would be undesirable). Thus they lack a butterfly valve in the intake tract, and do not have a throttle (although recent developments in [[Exhaust Gas Recirculation]] have introduced throttle-style designs<ref>http://delphi.com/manufacturers/cv/powertrain/mvrv/</ref>). They instead regulate engine power by directly controlling the quantity of fuel injected into the cylinder just before top [[dead centre]] (TDC) of the compression stroke.		Because [[diesel engine]]s use compression ignition, they do not need to control air volumes or mixture (indeed this would be undesirable). Thus they lack a butterfly valve in the intake tract, and do not have a throttle (although recent developments in [[Exhaust Gas Recirculation]] have introduced throttle-style designs<ref>http://delphi.com/manufacturers/cv/powertrain/mvrv/</ref>). They instead regulate engine power by directly controlling the quantity of fuel injected into the cylinder just before top dead centre (TDC) of the compression stroke.

	==Environmental aspects==		==Environmental aspects==

Red marquis at 09:24, 2 June 2009

2009-06-02T09:24:27Z

← Older revision		Revision as of 09:24, 2 June 2009
Line 27:		Line 27:

	Throttle application via the accelerator pedal also results in increased sound emission from the engine. At lower operating speeds this component of [[roadway noise\|vehicle noise]] is prominent, contrasted with higher operating speeds, for which [[aerodynamic]] and [[tire]] noise are more significant.<ref>[http://www.springerlink.com/content/x1707075n815g604/ C..Michael Hogan, '' Analysis of Highway Noise'', Journal of Water, Air, & Soil Pollution, Vol. 2, No. 3, Biomedical and Life Sciences and Earth and Environmental Science Issue, pages 387-392, Sept., 1973, Springer Verlag, Netherlands ISSN 0049-6979]</ref>		Throttle application via the accelerator pedal also results in increased sound emission from the engine. At lower operating speeds this component of [[roadway noise\|vehicle noise]] is prominent, contrasted with higher operating speeds, for which [[aerodynamic]] and [[tire]] noise are more significant.<ref>[http://www.springerlink.com/content/x1707075n815g604/ C..Michael Hogan, '' Analysis of Highway Noise'', Journal of Water, Air, & Soil Pollution, Vol. 2, No. 3, Biomedical and Life Sciences and Earth and Environmental Science Issue, pages 387-392, Sept., 1973, Springer Verlag, Netherlands ISSN 0049-6979]</ref>


	~~==References==~~
	~~{{reflist}}~~

	[[Category:Technology]]		[[Category:Technology]]

Red marquis at 09:23, 2 June 2009

2009-06-02T09:23:48Z

← Older revision		Revision as of 09:23, 2 June 2009
Line 4:		Line 4:

	[[Image:USPatent6518683.png\|right\|150px]]		[[Image:USPatent6518683.png\|right\|150px]]
			In a [[petrol]] (gasoline) [[internal combustion engine]], the throttle is a valve that directly regulates the amount of air entering the engine, indirectly controlling the fuel burned on each cycle due to the [[fuel injection\|fuel-injector]] or [[carburetor]] maintaining a relatively constant fuel/air ratio. In a motor vehicle the control used by the driver to regulate power is sometimes called the [[Automobile pedal\|throttle pedal]] or accelerator.

	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 referred to as a 'gas pedal' or 'accelerator'~~.		The throttle is typically a [[butterfly valve]]. In a [[fuel injection\|fuel-injected]] engine, the throttle valve is housed in the [[throttle body]]. In a carbureted engine, it is found in the carburetor.

	~~The~~ throttle is ~~typically a butterfly valve. In a~~ [[~~fuel injection~~\|~~fuel-injected~~]] ~~engine~~, the ~~throttle valve~~ is ~~housed in~~ the throttle ~~body. In~~ a ~~carbureted engine, it is found in the~~ [[~~carburetor~~]]~~. The butterfly valve in a fuel-injected throttle body has one or more holes in it to allow~~ the ~~engine air when idling~~.		When a throttle is [[wide open throttle\|wide open]], the intake [[Manifold (automotive engineering)\|manifold]] is usually at ambient atmospheric pressure. When the throttle is partially closed, a [[manifold vacuum]] develops as the intake drops below ambient pressure.

	~~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~~.		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 [[Engine Control Unit\|ECU]] greater possibilities in reducing air emissions.

	~~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~~ [[~~Engine Control Unit~~\|~~ECU~~]] ~~greater possibilties in reducing air emissions~~.		In a reciprocating-engine aircraft, the throttle control is usually a hand-operated lever or knob. It controls the engine power, which may or may not reflect in a change of RPM, depending on the [[Propeller#Aviation\|propeller]] installation (fixed-pitch or [[constant speed propeller\|constant speed]]).<ref>{{cite web
			\| title = Chapter 6: Aircraft Systems
			\| work = Pilot's Handbook of Aeronautical Knowledge
			\| publisher = [[Federal Aviation Administration]]
			\| year = 2008
			\| url = http://www.faa.gov/library/manuals/aviation/pilot_handbook/media/PHAK%20-%20Chapter%2006.pdf
			\| format = PDF
			\| accessdate = 2009-02-09 }}</ref>

			Because [[diesel engine]]s use compression ignition, they do not need to control air volumes or mixture (indeed this would be undesirable). Thus they lack a butterfly valve in the intake tract, and do not have a throttle (although recent developments in [[Exhaust Gas Recirculation]] have introduced throttle-style designs<ref>http://delphi.com/manufacturers/cv/powertrain/mvrv/</ref>). They instead regulate engine power by directly controlling the quantity of fuel injected into the cylinder just before top [[dead centre]] (TDC) of the compression stroke.

			==Environmental aspects==
			Regulation of the throttle is also a mechanism for controlling engine exhaust emissions. In many modern internal combustion engines an electronic throttle is used, eliminating the older accelerator cable.<ref>Victor Albert Walter Hillier and Peter Coombes, ‘'Hillier's Fundamentals of Motor Vehicle Technology'‘, 2004, 544 pages ISBN 0748703179</ref>

			Throttle application via the accelerator pedal also results in increased sound emission from the engine. At lower operating speeds this component of [[roadway noise\|vehicle noise]] is prominent, contrasted with higher operating speeds, for which [[aerodynamic]] and [[tire]] noise are more significant.<ref>[http://www.springerlink.com/content/x1707075n815g604/ C..Michael Hogan, '' Analysis of Highway Noise'', Journal of Water, Air, & Soil Pollution, Vol. 2, No. 3, Biomedical and Life Sciences and Earth and Environmental Science Issue, pages 387-392, Sept., 1973, Springer Verlag, Netherlands ISSN 0049-6979]</ref>


			==References==
			{{reflist}}

	[[Category:Technology]]		[[Category:Technology]]

MQuan: /* Internal combustion engines */

2006-11-20T20:27:21Z

Internal combustion engines

← Older revision		Revision as of 20:27, 20 November 2006
Line 7:		Line 7:
	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 referred to as a 'gas pedal' or 'accelerator'.		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 referred to as a 'gas pedal' or 'accelerator'.

	The throttle is typically a butterfly valve. In a [[fuel injection\|fuel-injected]] engine, the throttle valve is housed in the [[throttle body]]. In a carbureted engine, it is found in the [[carburetor]]. The butterfly valve in a fuel-injected throttle body has one or more holes in it to allow the engine air when idling.		The throttle is typically a butterfly valve. In a [[fuel injection\|fuel-injected]] engine, the throttle valve is housed in the throttle body. In a carbureted engine, it is found in the [[carburetor]]. The butterfly valve in a fuel-injected throttle body has one or more holes in it to allow the engine air when idling.

	When a throttle is [[wide open ~~throttle\|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.		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.

	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 [[Engine Control Unit\|ECU]] greater possibilties in reducing air emissions.		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 [[Engine Control Unit\|ECU]] greater possibilties in reducing air emissions.

MQuan at 20:27, 20 November 2006

2006-11-20T20:27:00Z

← Older revision		Revision as of 20:27, 20 November 2006
Line 7:		Line 7:
	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 referred to as a 'gas pedal' or 'accelerator'.		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 referred to as a 'gas pedal' or 'accelerator'.

	The throttle is typically a [[butterfly valve]]. In a [[fuel injection\|fuel-injected]] engine, the throttle valve is housed in the [[throttle body]]. In a carbureted engine, it is found in the [[carburetor]]. The butterfly valve in a fuel-injected throttle body has one or more holes in it to allow the engine air when idling.		The throttle is typically a butterfly valve. In a [[fuel injection\|fuel-injected]] engine, the throttle valve is housed in the [[throttle body]]. In a carbureted engine, it is found in the [[carburetor]]. The butterfly valve in a fuel-injected throttle body has one or more holes in it to allow the engine air when idling.

	When a throttle is [[wide open throttle\|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.		When a throttle is [[wide open throttle\|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.

	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 [[Engine Control Unit\|ECU]] greater possibilties in reducing air emissions.		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 [[Engine Control Unit\|ECU]] greater possibilties in reducing air emissions.


	[[Category:~~Engine technology]]~~		[[Category:Technology]]
	~~[[Category:Auto parts~~]]

72.151.20.162 at 01:07, 7 August 2006

2006-08-07T01:07:58Z

← Older revision		Revision as of 01:07, 7 August 2006
Line 7:		Line 7:
	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 referred to as a 'gas pedal' or 'accelerator'.		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 referred to as a 'gas pedal' or 'accelerator'.

	The throttle is typically a [[butterfly valve]]. In a [[fuel injection\|fuel-injected]] engine, the throttle valve is housed in the [[throttle body]]. In a carbureted engine, it is found in the [[carburetor]].		The throttle is typically a [[butterfly valve]]. In a [[fuel injection\|fuel-injected]] engine, the throttle valve is housed in the [[throttle body]]. In a carbureted engine, it is found in the [[carburetor]]. The butterfly valve in a fuel-injected throttle body has one or more holes in it to allow the engine air when idling.

	When a throttle is [[wide open throttle\|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.		When a throttle is [[wide open throttle\|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.

Carguy at 20:01, 27 June 2006

2006-06-27T20:01:51Z

New page

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, or the human controls (pedal, lever, electronic) that the operator uses to indirectly control an engine's power.

== Internal combustion engines ==

[[Image:USPatent6518683.png|right|150px]]

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 referred to as a 'gas pedal' or 'accelerator'.

The throttle is typically a [[butterfly valve]]. In a [[fuel injection|fuel-injected]] engine, the throttle valve is housed in the [[throttle body]]. In a carbureted engine, it is found in the [[carburetor]].

When a throttle is [[wide open throttle|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.

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 [[Engine Control Unit|ECU]] greater possibilties in reducing air emissions.

[[Category:Engine technology]]
[[Category:Auto parts]]