MIVEC - Revision history

Red marquis: /* Footnotes */

2008-06-25T06:39:37Z

Footnotes

← Older revision		Revision as of 06:39, 25 June 2008
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	\|-		\|-
	\|}		\|}

			==See Also==
			{{Mitsubishi Motors technologies}}

	==Footnotes==		==Footnotes==
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	</div>		</div>

	~~{{Mitsubishi Motors technologies}}~~

	[[Category:Valve timing tradenames]]		[[Category:Valve timing tradenames]]
	[[Category:Mitsubishi Motors technologies]]		[[Category:Mitsubishi Motors technologies]]

	~~[[ja:MIVEC]]~~
	~~[[it:MIVEC]]~~

Red marquis at 06:39, 25 June 2008

2008-06-25T06:39:06Z

← Older revision		Revision as of 06:39, 25 June 2008
Line 1:		Line 1:
	~~{{Engine Infobox \|~~		'''MIVEC (Mitsubishi Innovative Valve timing Electronic Control system)'''<ref>[http://www.mitsubishi-motors.com/corporate/about_us/technology/performance/e/mivec.html "Latest MMC technologies and near-future goals"], Mitsubishi Motors website</ref> is the brand name of a [[variable valve timing]] [[Internal combustion engine\|engine]] technology developed by [[Mitsubishi Motors]]. MIVEC, as with other similar systems, varies the timing, lift and duration<ref name="outlander">[http://media.mitsubishicars.com/detail?mid=MIT2006083039843&mime=ASC "2007 Mitsubishi Outlander Debuts New-Generation V-6 Engine And Segment-Exclusive Six-Speed Sportronic(R) Transmission"], Mitsubishi Motors North America press release</ref> of the [[poppet valve\|valve]]s by using two different [[camshaft]] profiles. At low speeds, a mild (low-lift) [[cam\|cam lobe]] provides stable [[Idle speed\|idle]], lower [[Exhaust gas\|emissions]] and increased [[torque]] at lower speeds, while above a fixed [[revolutions per minute\|engine speed]] a second set of cam lobes are activated, providing higher lift and duration; therefore a greater quantity of air into the [[combustion chamber]] which increases the power and torque output over a broad engine speed range.
	~~\|Image = '''place image here in 300 pixels'''~~
	~~\|Engine Name = Engine Name~~
	~~\|Manufacturer = '''place manufacturer here - not marque'''~~
	~~\|aka = '''Type aka here, not up there'''~~
	~~\|Type = '''Note what type of fuel it consumes'''~~
	~~\|Production/Introduction = '''produced/introduced from when to when'''~~
	~~\|Status = '''Note if it is''' "''In Production''", "''In Development''", a "''Concept Only''", "''Stillborn''" or "''Discontinued''"~~
	~~\|Displacement = '''in litres, cc's or cu-in.'''~~
	~~\|Aspiration = '''write its type of aspiration'''~~
	~~\|Configuration = '''write the configuration of the cylinders'''~~
	~~\|Cylinders = '''write the number of cylinders present'''~~
	~~\|Fuel System = '''write if it is injected or carburated and the system used'''~~
	~~\|Lubrification = '''indicate the engine's type of lubrification'''~~
	~~\|Output = N/A hp @ N/A rpm<br>N/A lb-ft. of [[torque]] @ N/A rpm~~
	~~\|Bore = '''in inches'''~~
	~~\|Stroke = '''in inches'''~~
	~~\|Compression = '''write compression ratio here'''~~
	~~\|In. Valves = '''in inches'''~~
	~~\|Ex. Valves = '''in inches'''~~
	~~\|Firing Order = '''Firing order of cylinders'''~~
	~~\|Left Bank = '''Write which cylinders are in this bank (write N/A if it it is inline)'''~~
	~~\|Right Bank = '''''(same as above)'''''~~
	~~\|Length = '''in inches'''~~
	~~\|Diameter = '''in inches'''~~
	~~\|Width = '''in inches'''~~
	~~\|Height = '''in inches'''~~
	~~\|Dry Weight = '''lbs. / kg.'''~~
	~~\|Fuel Consumption = '''city/highway (mpg & km/L)'''~~
	~~\|Emission = CO: g/km<br>CO2: g/km<br>NOx: g/km<br>Hydrocarbon: g/km<br>Particulate: g/km~~
	~~\|Chief Engineer = '''write here'''~~
	}}
	~~'''Use the following TEMPLATE as the foundation for the Wikicars' Engine page:'''~~

	~~Start off with a brief Introduction to the particular Engine.~~

	~~===Photos===~~

	~~<gallery>~~
	~~</gallery>~~

	~~==Unique Attributes==~~
	~~If there are any features of this [[automobile\|vehicle]] that sets it apart from other [[automobile\|vehicles]] in its class, then mention those ''unique attributes'' here.~~

	~~==Criticisms==~~
	~~Please make sure to '''''keep critiques in a third-person point of view'''''. If using criticisms from a reputable automotive source, then '''''please make sure to cite the quote'''''.~~


	~~==Worldwide==~~
	~~If the [[automobile\|vehicle]] is sold in other markets worldwide, then this is the section to mention that information. Also, mention if the <MODEL> goes by another name in these other markets.~~

	~~==Design quirks and oddities==~~
	~~Refer to any pop-culture tidbits about the [[Automobile\|vehicle]] in this section.~~

	~~==Awards==~~
	~~List out notable ''awards'' that the model has recieved while in production. '''Boldface''' the company or orgainization that gives out the award, and ''Italicize'' the name of the award.~~

	~~==See Also==~~

	~~==External Links==~~
	~~Please include any external sites that were used in collaborating this data, including manufacturer sites, in this section.~~

	~~[[Category:Engines]]~~

	'''MIVEC (Mitsubishi Innovative Valve timing Electronic Control system)'''<ref>[http://www.mitsubishi-motors.com/corporate/about_us/technology/performance/e/mivec.html "Latest MMC technologies and near-future goals"], Mitsubishi Motors website</ref> is the [[brand name]] of a [[variable valve timing]] [[Internal combustion engine\|engine]] technology developed by [[Mitsubishi Motors]]. MIVEC, as with other similar systems, varies the timing, lift and duration<ref name="outlander">[http://media.mitsubishicars.com/detail?mid=MIT2006083039843&mime=ASC "2007 Mitsubishi Outlander Debuts New-Generation V-6 Engine And Segment-Exclusive Six-Speed Sportronic(R) Transmission"], Mitsubishi Motors North America press release</ref> of the [[poppet valve\|valve]]s by using two different [[camshaft]] profiles. At low speeds, a mild (low-lift) [[cam\|cam lobe]] provides stable [[Idle speed\|idle]], lower [[Exhaust gas\|emissions]] and increased [[torque]] at lower speeds, while above a fixed [[revolutions per minute\|engine speed]] a second set of cam lobes are activated, providing higher lift and duration; therefore a greater quantity of air into the [[combustion chamber]] which increases the power and torque output over a broad engine speed range.

	From [[Mitsubishi_4B1_engine\|4B1]] engine family onward, MIVEC has fully evolved into a [[continuous variable valve timing]] system (dual VVT on intake and exhaust valves).		From [[Mitsubishi_4B1_engine\|4B1]] engine family onward, MIVEC has fully evolved into a [[continuous variable valve timing]] system (dual VVT on intake and exhaust valves).

Red marquis at 06:37, 25 June 2008

2008-06-25T06:37:06Z

← Older revision		Revision as of 06:37, 25 June 2008
Line 1:		Line 1:
			{{Engine Infobox \|
			\|Image = '''place image here in 300 pixels'''
			\|Engine Name = Engine Name
			\|Manufacturer = '''place manufacturer here - not marque'''
			\|aka = '''Type aka here, not up there'''
			\|Type = '''Note what type of fuel it consumes'''
			\|Production/Introduction = '''produced/introduced from when to when'''
			\|Status = '''Note if it is''' "''In Production''", "''In Development''", a "''Concept Only''", "''Stillborn''" or "''Discontinued''"
			\|Displacement = '''in litres, cc's or cu-in.'''
			\|Aspiration = '''write its type of aspiration'''
			\|Configuration = '''write the configuration of the cylinders'''
			\|Cylinders = '''write the number of cylinders present'''
			\|Fuel System = '''write if it is injected or carburated and the system used'''
			\|Lubrification = '''indicate the engine's type of lubrification'''
			\|Output = N/A hp @ N/A rpm<br>N/A lb-ft. of [[torque]] @ N/A rpm
			\|Bore = '''in inches'''
			\|Stroke = '''in inches'''
			\|Compression = '''write compression ratio here'''
			\|In. Valves = '''in inches'''
			\|Ex. Valves = '''in inches'''
			\|Firing Order = '''Firing order of cylinders'''
			\|Left Bank = '''Write which cylinders are in this bank (write N/A if it it is inline)'''
			\|Right Bank = '''''(same as above)'''''
			\|Length = '''in inches'''
			\|Diameter = '''in inches'''
			\|Width = '''in inches'''
			\|Height = '''in inches'''
			\|Dry Weight = '''lbs. / kg.'''
			\|Fuel Consumption = '''city/highway (mpg & km/L)'''
			\|Emission = CO: g/km<br>CO2: g/km<br>NOx: g/km<br>Hydrocarbon: g/km<br>Particulate: g/km
			\|Chief Engineer = '''write here'''
			}}
			'''Use the following TEMPLATE as the foundation for the Wikicars' Engine page:'''

			Start off with a brief Introduction to the particular Engine.

			===Photos===

			<gallery>
			</gallery>

			==Unique Attributes==
			If there are any features of this [[automobile\|vehicle]] that sets it apart from other [[automobile\|vehicles]] in its class, then mention those ''unique attributes'' here.

			==Criticisms==
			Please make sure to '''''keep critiques in a third-person point of view'''''. If using criticisms from a reputable automotive source, then '''''please make sure to cite the quote'''''.


			==Worldwide==
			If the [[automobile\|vehicle]] is sold in other markets worldwide, then this is the section to mention that information. Also, mention if the <MODEL> goes by another name in these other markets.

			==Design quirks and oddities==
			Refer to any pop-culture tidbits about the [[Automobile\|vehicle]] in this section.

			==Awards==
			List out notable ''awards'' that the model has recieved while in production. '''Boldface''' the company or orgainization that gives out the award, and ''Italicize'' the name of the award.

			==See Also==

			==External Links==
			Please include any external sites that were used in collaborating this data, including manufacturer sites, in this section.

			[[Category:Engines]]

	'''MIVEC (Mitsubishi Innovative Valve timing Electronic Control system)'''<ref>[http://www.mitsubishi-motors.com/corporate/about_us/technology/performance/e/mivec.html "Latest MMC technologies and near-future goals"], Mitsubishi Motors website</ref> is the [[brand name]] of a [[variable valve timing]] [[Internal combustion engine\|engine]] technology developed by [[Mitsubishi Motors]]. MIVEC, as with other similar systems, varies the timing, lift and duration<ref name="outlander">[http://media.mitsubishicars.com/detail?mid=MIT2006083039843&mime=ASC "2007 Mitsubishi Outlander Debuts New-Generation V-6 Engine And Segment-Exclusive Six-Speed Sportronic(R) Transmission"], Mitsubishi Motors North America press release</ref> of the [[poppet valve\|valve]]s by using two different [[camshaft]] profiles. At low speeds, a mild (low-lift) [[cam\|cam lobe]] provides stable [[Idle speed\|idle]], lower [[Exhaust gas\|emissions]] and increased [[torque]] at lower speeds, while above a fixed [[revolutions per minute\|engine speed]] a second set of cam lobes are activated, providing higher lift and duration; therefore a greater quantity of air into the [[combustion chamber]] which increases the power and torque output over a broad engine speed range.		'''MIVEC (Mitsubishi Innovative Valve timing Electronic Control system)'''<ref>[http://www.mitsubishi-motors.com/corporate/about_us/technology/performance/e/mivec.html "Latest MMC technologies and near-future goals"], Mitsubishi Motors website</ref> is the [[brand name]] of a [[variable valve timing]] [[Internal combustion engine\|engine]] technology developed by [[Mitsubishi Motors]]. MIVEC, as with other similar systems, varies the timing, lift and duration<ref name="outlander">[http://media.mitsubishicars.com/detail?mid=MIT2006083039843&mime=ASC "2007 Mitsubishi Outlander Debuts New-Generation V-6 Engine And Segment-Exclusive Six-Speed Sportronic(R) Transmission"], Mitsubishi Motors North America press release</ref> of the [[poppet valve\|valve]]s by using two different [[camshaft]] profiles. At low speeds, a mild (low-lift) [[cam\|cam lobe]] provides stable [[Idle speed\|idle]], lower [[Exhaust gas\|emissions]] and increased [[torque]] at lower speeds, while above a fixed [[revolutions per minute\|engine speed]] a second set of cam lobes are activated, providing higher lift and duration; therefore a greater quantity of air into the [[combustion chamber]] which increases the power and torque output over a broad engine speed range.

Digitalrailroader at 08:54, 23 June 2008

2008-06-23T08:54:18Z

New page

'''MIVEC (Mitsubishi Innovative Valve timing Electronic Control system)'''<ref>[http://www.mitsubishi-motors.com/corporate/about_us/technology/performance/e/mivec.html "Latest MMC technologies and near-future goals"], Mitsubishi Motors website</ref> is the [[brand name]] of a [[variable valve timing]] [[Internal combustion engine|engine]] technology developed by [[Mitsubishi Motors]]. MIVEC, as with other similar systems, varies the timing, lift and duration<ref name="outlander">[http://media.mitsubishicars.com/detail?mid=MIT2006083039843&mime=ASC "2007 Mitsubishi Outlander Debuts New-Generation V-6 Engine And Segment-Exclusive Six-Speed Sportronic(R) Transmission"], Mitsubishi Motors North America press release</ref> of the [[poppet valve|valve]]s by using two different [[camshaft]] profiles. At low speeds, a mild (low-lift) [[cam|cam lobe]] provides stable [[Idle speed|idle]], lower [[Exhaust gas|emissions]] and increased [[torque]] at lower speeds, while above a fixed [[revolutions per minute|engine speed]] a second set of cam lobes are activated, providing higher lift and duration; therefore a greater quantity of air into the [[combustion chamber]] which increases the power and torque output over a broad engine speed range.

From [[Mitsubishi_4B1_engine|4B1]] engine family onward, MIVEC has fully evolved into a [[continuous variable valve timing]] system (dual VVT on intake and exhaust valves).
<ref name="newgen">[http://media.mitsubishicars.com/detail?mid=MIT2007010850689&mime=ASC "All-New 2008 Mitsubishi Lancer Delivers Driven-To-Thrill Performance from New 152-HP Engine and Optional CVT"], Mitsubishi Motors North America press release</ref> MIVEC incorporated in [[Mitsubishi_3B2_engine|3B2]], [[Mitsubishi_3A9_engine|3A9]] and [[Mitsubishi_4A9_engine|4A9]] engine family continuously varies only the intake valves. Many older implementations only vary the valve timing (the amount of time per engine revolution that the intake port is open) and not the lift.

MIVEC was first introduced in 1992 in their ''[[Mitsubishi 4G9 engine|4G92]]'' powerplant, a 1,597 cc [[naturally aspirated]] [[DOHC]] 16 valve [[straight-4]].<ref>[http://www.mitsubishi-motors.com/corporate/museum/history/1990/e/index.html History of Mitsubishi, 1990-1999], Mitsubishi Motors website</ref> At the time, the first generation of the system was named ''Mitsubishi Innovative Valve timing and lift Electronic Control''.<ref name="africa"/> The first cars to use this were the [[Mitsubishi Mirage]] [[hatchback]] and the [[Mitsubishi Lancer]] [[sedan]]. While the conventional ''4G92'' engine provided 145 [[Horsepower#PS|PS]] at 7000 [[rpm]],<ref>[http://english.auto.vl.ru/catalog/mitsubishi/mirage/1992_10/18901/ 1992 Mitsubishi Lancer RS specifications], English.auto.vl.ru</ref> the MIVEC-equipped engine could achieve 175 PS at 7500 rpm.<ref>[http://english.auto.vl.ru/catalog/mitsubishi/mirage/1992_10/18913/ 1992 Mitsubishi Lancer Cyborg specifications], English.auto.vl.ru</ref> Similar improvements were seen when the technology was applied to the 1994 [[Mitsubishi FTO]], whose top-spec GPX variant had a ''[[Mitsubishi 6A1 engine|6A12]]'' 1997 cc [[DOHC]] 24 valve [[V6]] with peak power of 200 PS at 7500 rpm.<ref>[http://english.auto.vl.ru/catalog/mitsubishi/fto/1994_10/15651/ 1994 Mitsubishi FTO GPX specifications], English.auto.vl.ru</ref> The GR model, whose otherwise identical powerplant was not MIVEC-equipped, produced 170 PS at 7000 rpm by comparison.<ref>[http://english.auto.vl.ru/catalog/mitsubishi/fto/1994_10/15649/ 1994 Mitsubishi FTO GR specifications], English.auto.vl.ru</ref>

Although initially designed to enhance performance, the system has subsequently been developed to improve [[Fuel economy in automobiles|economy]] and emissions, and has been introduced across Mitsubishi's range of vehicles, from the [[Mitsubishi i|i]] ''[[kei car]]'' to the high-performance [[Lancer Evolution]] sedan.

===Operation===
Some types of variable valve control systems optimize power and torque by varying valve opening times and/or duration. Some of these valve control systems optimize performance at low and mid-range engine speeds. Others focus on enhancing only high-rpm power. MIVEC system provides both of these benefits by controlling valve timing and lift. The basic operation of the MIVEC system is altering the cam profiles and thus tailoring engine performance in response to driver input.<ref name="outlander"/>

In essence, MIVEC serves the same function as "swapping cams", something that car racers might do when modifying older-design engines to produce more power. However, such swaps come with a compromise - generally yielding either greater low-end torque or more high-end horsepower, but not both.
MIVEC achieves both goals. With MIVEC, the "cam swap" occurs automatically at a fixed [[revolutions per minute|engine speed]]. The cam switch operation is transparent to the driver, who is simply rewarded with a smooth flow of power.<ref name="outlander"/>

Two distinct cam profiles are used to provide two engine modes: a low-speed mode, consisting of low-lift cam profiles; and a high-speed mode. The low-lift cams and rocker arms - which drive separate intake valves - are positioned on either side of a centrally located high-lift cam.
Each of the intake valves is operated by a low-lift cam and rocker arm, while placing a T-lever between them allows the valves to follow the action of the high-lift cam.<ref name="outlander"/>

At low speeds, The T-lever's wing section floats freely, enabling the low-lift cams to operate the valves. The intake rocker arms contain internal pistons, which are retained by springs in a lowered position while the engine speed is below the MIVEC switchover point, to avoid contacting the high-lift T-shaped levers. At high speeds, hydraulic pressure elevates the hydraulic pistons, causing the T-lever to push against the rocker arm, which in turn makes the high-lift cam operate the valves.<ref name="outlander"/>

In summary, MIVEC switches to the higher cam profile as engine speed increases, and drops back to the lower cam profile as engine speed decreases. The reduced valve overlap in low-speed mode provides stable idling, while accelerated timing of the intake valve's closing reduces backflow to improve volumetric efficiency, which helps increase engine output as well as reduce lift friction. High-speed mode takes advantage of the pulsating intake effect created by the mode's high lift and retarded timing of intake valve closure. The resulting reduced pumping loss of the larger valve overlap yields higher power output and a reduction in friction. The low- and high-speed modes overlap for a brief period, boosting torque.<ref name="outlander"/>

In the systems latest generation ([[Mitsubishi_4B1_engine|4B1 engine family]]), intake and exhaust cam timing is continuously independently controlled to provide four optimized engine-operating modes:<ref name="newgen"/>
*Under most conditions, to ensure highest fuel efficiency, valve overlap is increased to reduce pumping losses. The exhaust valve opening timing is retarded for higher expansion ratio, enhancing fuel economy.
*When maximum power is demanded (high engine speed and load), intake valve closing timing is retarded to synchronize the intake air pulsations for larger air volume.
*Under low-speed, high load, MIVEC ensures optimal torque delivery with the intake valve closing timing advanced to ensure sufficient air volume. At the same time, the exhaust valve opening timing is retarded to provide a higher expansion ratio and improved efficiency.
*At idle, valve overlap is eliminated to stabilize combustion.

===MIVEC-MD===
In the early years of developing its MIVEC technology, Mitsubishi also introduced a variant dubbed MIVEC-MD (Modulated Displacement),<ref name="mountain">[http://autospeed.drive.com.au/cms/A_2651/article.html "Mountain of MIVECs"], Michael Knowling, ''AutoSpeed'', Issue 346, [[September 3]] [[2005]]</ref><ref name="africa">[http://www.mitsubishi-motors.co.za/featuresites/mm_history/GDI.asp "Mitsubishi Motors History - Engine Technology"], Mitsubishi Motors South Africa website</ref> a form of [[variable displacement]]. Under a light throttle load, the intake and exhaust valves in two of the cylinders would remain closed, and the reduced pumping losses gave a claimed 10–20 percent improvement in fuel economy. Modulated Displacement was dropped around 1996.<ref name="mountain"/>

==Current implementations==
{| class="wikitable"
|-
! style="width:15em" | Engine code
! style="width:15em" | Capacity
! style="width:15em" | Configuration
! style="width:15em" | Year
|-
| align="center" | ''[[Mitsubishi 3A9 engine|3A91]]''
| align="center" | 1124 [[Cubic centimetres|cc]]
| align="center" | [[Straight-3]]
| align="center" | (2003–present)
|-
| align="center" | ''[[Mitsubishi 3B2 engine|3B20]]''
| align="center" | 659 cc
| align="center" | Straight-3
| align="center" | (2005–present)
|-
| align="center" | ''[[Mitsubishi 4A9 engine|4A90]]''
| align="center" | 1332 cc
| align="center" | [[Straight-4]]
| align="center" | (2003–present)
|-
| align="center" | ''[[Mitsubishi 4A9 engine|4A91]]''
| align="center" | 1499 cc
| align="center" | Straight-4
| align="center" | (2003–present)
|-
| align="center" | ''[[Mitsubishi 4B1 engine|4B10]]''
| align="center" | 1798 cc
| align="center" | Straight-4
| align="center" | (2007–present)
|-
| align="center" | ''[[Mitsubishi 4B1 engine|4B11]]''
| align="center" | 1998 cc
| align="center" | Straight-4
| align="center" | (2007–present)
|-
| align="center" | ''[[Mitsubishi 4B1 engine|4B12]]''
| align="center" | 2359 cc
| align="center" | Straight-4
| align="center" | (2005–present)
|-
| align="center" | ''[[Mitsubishi Orion engine|4G15]]''
| align="center" | 1468 cc
| align="center" | Straight-4
| align="center" | (2003–present)
|-
| align="center" | ''[[Mitsubishi Sirius engine|4G69]]''
| align="center" | 2378 cc
| align="center" | Straight-4
| align="center" | (2003–present)
|-
| align="center" | ''[[Mitsubishi 6B3 engine|6B31]]''
| align="center" | 2998 cc
| align="center" | [[V6]]
| align="center" | (2006–present)
|-
| align="center" | ''[[Mitsubishi 6G7 engine|6G75]]''
| align="center" | 3828 cc
| align="center" | V6
| align="center" | (2005–present)
|-
|}

==Past implementations==
{| class="wikitable"
|-
! style="width:15em" | Engine code
! style="width:15em" | Capacity
! style="width:15em" | Configuration
! style="width:15em" | Year
|-
| align="center" | ''[[Mitsubishi Orion engine|4G19]]''
| align="center" | 1343 cc
| align="center" | Straight-4
| align="center" | (2002–2006)
|-
| align="center" | ''[[Mitsubishi 4G9 engine|4G92]]''
| align="center" | 1597 cc
| align="center" | Straight-4
| align="center" | (1992–1999)
|-

| align="center" | ''[[Mitsubishi Sirius engine|4G63T]]''
| align="center" | 1997 cc
| align="center" | Straight-4
| align="center" | (2005–2007)
|-
| align="center" | ''[[Mitsubishi 6A1 engine|6A12]]''
| align="center" | 1998 cc
| align="center" | V6
| align="center" | (1993–1995)
|-
| align="center" | ''[[Mitsubishi 6G7 engine|6G72]]''
| align="center" | 2972 cc
| align="center" | V6
| align="center" | (1995–1997)
|-
|}

==Footnotes==
<div class="references-small">
<references/>
</div>

{{Mitsubishi Motors technologies}}

[[Category:Valve timing tradenames]]
[[Category:Mitsubishi Motors technologies]]

[[ja:MIVEC]]
[[it:MIVEC]]

← Older revision		Revision as of 06:39, 25 June 2008
Line 1:		Line 1:
	~~{{Engine Infobox \|~~		'''MIVEC (Mitsubishi Innovative Valve timing Electronic Control system)'''<ref>[http://www.mitsubishi-motors.com/corporate/about_us/technology/performance/e/mivec.html "Latest MMC technologies and near-future goals"], Mitsubishi Motors website</ref> is the brand name of a [[variable valve timing]] [[Internal combustion engine\|engine]] technology developed by [[Mitsubishi Motors]]. MIVEC, as with other similar systems, varies the timing, lift and duration<ref name="outlander">[http://media.mitsubishicars.com/detail?mid=MIT2006083039843&mime=ASC "2007 Mitsubishi Outlander Debuts New-Generation V-6 Engine And Segment-Exclusive Six-Speed Sportronic(R) Transmission"], Mitsubishi Motors North America press release</ref> of the [[poppet valve\|valve]]s by using two different [[camshaft]] profiles. At low speeds, a mild (low-lift) [[cam\|cam lobe]] provides stable [[Idle speed\|idle]], lower [[Exhaust gas\|emissions]] and increased [[torque]] at lower speeds, while above a fixed [[revolutions per minute\|engine speed]] a second set of cam lobes are activated, providing higher lift and duration; therefore a greater quantity of air into the [[combustion chamber]] which increases the power and torque output over a broad engine speed range.
	~~\|Image = '''place image here in 300 pixels'''~~
	~~\|Engine Name = Engine Name~~
	~~\|Manufacturer = '''place manufacturer here - not marque'''~~
	~~\|aka = '''Type aka here, not up there'''~~
	~~\|Type = '''Note what type of fuel it consumes'''~~
	~~\|Production/Introduction = '''produced/introduced from when to when'''~~
	~~\|Status = '''Note if it is''' "''In Production''", "''In Development''", a "''Concept Only''", "''Stillborn''" or "''Discontinued''"~~
	~~\|Displacement = '''in litres, cc's or cu-in.'''~~
	~~\|Aspiration = '''write its type of aspiration'''~~
	~~\|Configuration = '''write the configuration of the cylinders'''~~
	~~\|Cylinders = '''write the number of cylinders present'''~~
	~~\|Fuel System = '''write if it is injected or carburated and the system used'''~~
	~~\|Lubrification = '''indicate the engine's type of lubrification'''~~
	~~\|Output = N/A hp @ N/A rpm<br>N/A lb-ft. of [[torque]] @ N/A rpm~~
	~~\|Bore = '''in inches'''~~
	~~\|Stroke = '''in inches'''~~
	~~\|Compression = '''write compression ratio here'''~~
	~~\|In. Valves = '''in inches'''~~
	~~\|Ex. Valves = '''in inches'''~~
	~~\|Firing Order = '''Firing order of cylinders'''~~
	~~\|Left Bank = '''Write which cylinders are in this bank (write N/A if it it is inline)'''~~
	~~\|Right Bank = '''''(same as above)'''''~~
	~~\|Length = '''in inches'''~~
	~~\|Diameter = '''in inches'''~~
	~~\|Width = '''in inches'''~~
	~~\|Height = '''in inches'''~~
	~~\|Dry Weight = '''lbs. / kg.'''~~
	~~\|Fuel Consumption = '''city/highway (mpg & km/L)'''~~
	~~\|Emission = CO: g/km<br>CO2: g/km<br>NOx: g/km<br>Hydrocarbon: g/km<br>Particulate: g/km~~
	~~\|Chief Engineer = '''write here'''~~
	}}
	~~'''Use the following TEMPLATE as the foundation for the Wikicars' Engine page:'''~~

	~~Start off with a brief Introduction to the particular Engine.~~

	~~===Photos===~~

	~~<gallery>~~
	~~</gallery>~~

	~~==Unique Attributes==~~
	~~If there are any features of this [[automobile\|vehicle]] that sets it apart from other [[automobile\|vehicles]] in its class, then mention those ''unique attributes'' here.~~

	~~==Criticisms==~~
	~~Please make sure to '''''keep critiques in a third-person point of view'''''. If using criticisms from a reputable automotive source, then '''''please make sure to cite the quote'''''.~~


	~~==Worldwide==~~
	~~If the [[automobile\|vehicle]] is sold in other markets worldwide, then this is the section to mention that information. Also, mention if the <MODEL> goes by another name in these other markets.~~

	~~==Design quirks and oddities==~~
	~~Refer to any pop-culture tidbits about the [[Automobile\|vehicle]] in this section.~~

	~~==Awards==~~
	~~List out notable ''awards'' that the model has recieved while in production. '''Boldface''' the company or orgainization that gives out the award, and ''Italicize'' the name of the award.~~

	~~==See Also==~~

	~~==External Links==~~
	~~Please include any external sites that were used in collaborating this data, including manufacturer sites, in this section.~~

	~~[[Category:Engines]]~~

	'''MIVEC (Mitsubishi Innovative Valve timing Electronic Control system)'''<ref>[http://www.mitsubishi-motors.com/corporate/about_us/technology/performance/e/mivec.html "Latest MMC technologies and near-future goals"], Mitsubishi Motors website</ref> is the [[brand name]] of a [[variable valve timing]] [[Internal combustion engine\|engine]] technology developed by [[Mitsubishi Motors]]. MIVEC, as with other similar systems, varies the timing, lift and duration<ref name="outlander">[http://media.mitsubishicars.com/detail?mid=MIT2006083039843&mime=ASC "2007 Mitsubishi Outlander Debuts New-Generation V-6 Engine And Segment-Exclusive Six-Speed Sportronic(R) Transmission"], Mitsubishi Motors North America press release</ref> of the [[poppet valve\|valve]]s by using two different [[camshaft]] profiles. At low speeds, a mild (low-lift) [[cam\|cam lobe]] provides stable [[Idle speed\|idle]], lower [[Exhaust gas\|emissions]] and increased [[torque]] at lower speeds, while above a fixed [[revolutions per minute\|engine speed]] a second set of cam lobes are activated, providing higher lift and duration; therefore a greater quantity of air into the [[combustion chamber]] which increases the power and torque output over a broad engine speed range.

	From [[Mitsubishi_4B1_engine\|4B1]] engine family onward, MIVEC has fully evolved into a [[continuous variable valve timing]] system (dual VVT on intake and exhaust valves).		From [[Mitsubishi_4B1_engine\|4B1]] engine family onward, MIVEC has fully evolved into a [[continuous variable valve timing]] system (dual VVT on intake and exhaust valves).