Variable Valve Timing

[BlackSamurai]

Different car manufacturer will name their Variable Valve Timing different, can we have a list of them?

Honda vtec, [size=-1]Variable-Timing & lift, Electronically Controlled[/size]
Toyota vvt-i, Variable Valve Timing with Intelligence
Daihutsu/Perodua DVVT, Dynamic Variable Valve Timing
Hyundai CVVT, Continuously variable valve timing

How about
Suzuki?
Nissan?
Mazda?
Renault?
Merc? (got ar?)
BMW? (got ar?)
Alpa Romeo?

and other car maker?

 

[2zzge]

blacksamurai :
Honda vtec, Variable-Timing & lift, Electronically Controlled.......
"lift" ? i dont see it

what about toyota vvti-L ? this one with LIFT

 

[2zzge]

and i found out this topic is lame.

so boring..this topic discussed over and over again

 

[phantomCL7R]

blacksamurai :
Honda vtec, Variable-Timing & lift, Electronically Controlled.......
"lift" ? i dont see it

what about toyota vvti-L ? this one with LIFT

bro...what do u mean u dont see lift? vtec stands for variable valve timing and electronic lift control...it alters the lift by having three different lift on three different profile of camshaft lobe...all to impart flow..in order to make the intake air swirl on low rpm..come to think of it..i think honda is the first manufacturer to implement both variable valve timing and lift on their production car...valve timing does make a difference in hp but by changing the lift it raises the hp significantly while maintaining the driveability when not in the VTEC high lift mode..cheers guys!!

 

[phantomCL7R]

Different car manufacturer will name their Variable Valve Timing different, can we have a list of them?

Honda vtec, [size=-1]Variable-Timing & lift, Electronically Controlled[/size]
Toyota vvt-i, Variable Valve Timing with Intelligence
Daihutsu/Perodua DVVT, Dynamic Variable Valve Timing
Hyundai CVVT, Continuously variable valve timing

How about
Suzuki?
Nissan?
Mazda?
Renault?
Merc? (got ar?)
BMW? (got ar?)
Alpa Romeo?

and other car maker?

nissan----------neo vvl
bmw-------------vanos

 

[koolspyda]

Over Ten years ago variable valve timing was exotic technology; today it's so.............common

'1988 - Highly fuel-efficient, high-output VTEC engine released.

August 1990 - NSX goes on sale as a 1991 model, the first production car with an all-aluminum chassis and body. The aluminum unit body weighs only 462 pounds, 40% less than steel, with the equivalent strength.

The car is powered by 3.0-liter, DOHC, 24-valve, V-6 engine mated to a 5-speed manual transmission, good for 270 hp, 210 lb-ft of torque and a 0-60 mph time of under six seconds. Acura's breakthrough VTEC(TM) (Variable Valve Timing and Lift Electronic Control) system also makes its U.S. debut in the NSX, solving the trade-off between low-end torque and high-RPM power.

http://www.visionengineer.com/mech/variable_valve_timing.shtml
http://www.mr2sc.com/websites/articles/vvt.htm
http://www.leecao.com/honda/vtec/dohcvtec.html

have fun ......

 

[bridgestoneRE711]

come on , the lifting technology is used by alfa since early 80... they are the pioneer .

 

[TitanRev]

Damn i got some of th infos but left it at home. I remeber a few...

Poscher (did i get the spelling right ?)
VarioCam or VarioCamPlus

BMW got
VANOS or double VANOS

Mazda have
S-VT sequential valve timing

NISSAN have
CVTCS Continuos valve timing control system
NEO VVL

Still got some but cant remember now. Go home already then post more.

 

[gloss]

was Perodua's DVVT (new kambara) using an old system? which they claimed is maintenance free. i thought of recall something in the past.

 

[zan]

come on , the lifting technology is used by alfa since early 80... they are the pioneer .

yeah, bridgestone is rite. alfa was the pioneer with variable valve timing and sells it as a mass market product. but even though the concept is good, alfa could not exploited it and benefited as much so they dropped the concept.

as honda got involved in F1 in mid 80s, they re-developed the system and it was so sucessful that Honda won a few F1 world championships. honda was quick to put it into road cars as well.. this fact is not known by many of our kids as they were too small to remember.

and Alfa engine did employ the Variable Valve TIming system again back in 1996. this time its in the 2.0 16V twin spark engine used by 155 S (facelift), 145 Cloverleaf, 146ti, 156 2.0 Selespeed, 147 2.0 Selespeed and the GTV as well as Spider. but if i am not mistaken, its only activating on the intake valves.

 

[7jz]

yeah, bridgestone is rite. alfa was the pioneer with variable valve timing and sells it as a mass market product. but even though the concept is good, alfa could not exploited it and benefited as much so they dropped the concept.

as honda got involved in F1 in mid 80s, they re-developed the system and it was so sucessful that Honda won a few F1 world championships. honda was quick to put it into road cars as well.. this fact is not known by many of our kids as they were too small to remember.

and Alfa engine did employ the Variable Valve TIming system again back in 1996. this time its in the 2.0 16V twin spark engine used by 155 S (facelift), 145 Cloverleaf, 146ti, 156 2.0 Selespeed, 147 2.0 Selespeed and the GTV as well as Spider. but if i am not mistaken, its only activating on the intake valves.

japan always imitate then improved it

 

[zan]

japan always imitate then improved it

yeah rite...japanese do create new things but when they imitate they do it as the best.

i wonder if proton is imitated by a japanese firm..what will happen?

p/s sighh..another proton bashing topic by me... :D

 

[BlackSamurai]

2zzge,
thanks for replying 2 msgs for this boring & lame thread.


Honda vtec, [size=-1]Variable-Timing & lift, Electronically Controlled
Honda ivtec
[/size] Toyota vvt-i, Variable Valve Timing with Intelligence
Toyota VVTL-i
Daihutsu/Perodua DVVT, Dynamic Variable Valve Timing
Hyundai CVVT, Continuously variable valve timing
Nissan Neo vvt
BMW Vanos, Double Vanos
Mazda [font=Arial,Helvetica][size=-1]S-VT
Ford [/size][/font][font=Arial,Helvetica][size=-1]VCT
Porsche Variocam Plus
[/size][/font]Rover VVC

How about
Suzuki?
Renault?
Merc?
Alpa Romeo?

and other car maker?

Found the following websites explain different type of Variable Valve Timing
http://www.autozine.org/technical_school/engine/vvt_2.htm

apparently, there are different type of VVT system
1) Cam-Changing VVT, example Vtec and NEO VVT

2) Cam Phasing VVT, example, VANOS or VVT-i

3) Cam-Changing + Cam Phasing, example, VVTL-i, Porshce Variocam Plus, i-VTEC

4) Rover unique VVT System.

 

[BlackSamurai]

being a pioneer but never market it are 2 different thing.
How many ppl still remember Microsoft Windows and Mac OS Gui is actually inspired by XEROX R&D?


Japan start imitation, but they no longer doing that.
ROBOTIC technology from Japan is leading the world.

 

[zan]

alfa romeo doesnt have any specific name for its variable valve timing system. i dont know why.

instead of such system, mercedez is using supercharger to increase the horsepower of their engines. same thing for saab and volvo, they use light pressure turbochargers to squeeze more power out of the engine. this save costs by not having to carry out costly research which is also time consuming. optional of coz is higher pressure turbocharge engine.

diferrent manufacturers have different philosophy and thinking.

p/s if not mistaken new suzuki swift also has VVTI. they call it VVT i think.

 

[miveccom]

Mitsubishi = MIVEC ka?

 

[BlackSamurai]

Honda VTEC, Variable-Timing & lift, Electronically Controlled
Honda i-VTEC
Toyota VVT-i, Variable Valve Timing with Intelligence
Toyota VVTL-i
Daihutsu/Perodua DVVT, Dynamic Variable Valve Timing
Hyundai CVVT, Continuously variable valve timing
Nissan/Renault Neo VVT
BMW Vanos, Double Vanos
Mazda S-VT
Ford VCT
Porsche Variocam Plus
Rover VVC
Mitsubish MIVEC, Mitsubishi Innovative Valve timing Electronic Control system
Suzuki VVT

How about

Merc?
Alpa Romeo?

and other car maker?

 

[boggysv]

Campro lor.....proton say gen 2 got campro wan....

 

[BlackSamurai]

haha, sorry, boggysv, can't take that in the list...

 

[Wira v6 MIVEC]

MITSUBISHI=Mitsubishi innovative valve timing n lift electronic controller..
i think u missed out the lift..hehe