Dual vvti

[Jchuacl]

The VVTLi did have variable lift but they did not use it after the models for celica ss2/trd sports m and Will VS have been phased out.

 

 

dual vvti no big deal. It is all about cam phasing on both the intake and the exhaust valves nia. If you talk about Valvematic then i agree, yes thats something to talk about since it brings in variable cam lift woohoo

 

[SeriousGuy]

dual vvti no big deal. It is all about cam phasing on both the intake and the exhaust valves nia. If you talk about Valvematic then i agree, yes thats something to talk about since it brings in variable cam lift woohoo

yup , i already said , dual vvt-i last time already got , nothing special .

[Happily1986]

The VVTLi did have variable lift but they did not use it after the models for celica ss2/trd sports m and Will VS have been phased out.

 

difference is that VVTL-i cannot meet Euro emission standards, Valvematic can.

[Good-Carbuyer]

seen the new altis dual vvti.

like sibei power, but does it increase the fc?

Hmm... having fun of twins babies instead of two babies space a couple of years apart? Pay more, but value-for-money?

[Good-Carbuyer]

it's supposed to safe fuel coz the dual vvti make combustion, intake and outlet valves, operate according to speed, load, mixture etc etc...

Fiat Uno 4 cylinders with 2 valves each about the same FC as Japanese 4 cyclinders with 4 valves each. Could dual vvti be marketing strategy or product deficiency compensation?

[Good-Carbuyer]

ya and how much of that car up the lorry, involved in accident, and killed how many drivers?

Some marketing strategy?

[Nez]

Altis is best fuel efficient when Dual VVT-i and CVT transmission work together. 7 speed Super CVT-i transmission comes with 2.0 and 1.8 models. There are 3 driving zones of CVT, idle zone, economy zone and power zone. When you are driving in economy zone, the green leaf ECO indicator will light up. Any increase in speed will not increase engine RPM. Dual VVT-i 2.0 and 1.8 also come with ACIS (Acoustic Control Induction System) which is an intake air control valve to optimize power and torque.

 

For full detail of new Altis, e.g. Dual VVT-i, Super CVT-i, Eco Tech, Safety, etc download E-Catalog. Unzip and double click AltisCatalog.exe to extract. Detail is presented in Adobe Flash video.

[Darthrevan]

the green leaf ECO indicator should be used in all vehicles to encourage drivers to drive efficiently

[Mini-itx2010]

seen the new altis dual vvti.

like sibei power, but does it increase the fc?

 

No, the new (or rather old) dual VVTI is designed for better FC. But its not alot better than single VVTI. THis is because controlling the exhaust cam phasing is not as critical as intake cam phasing. There will still be some improvement though.

[Mini-itx2010]

Fiat Uno 4 cylinders with 2 valves each about the same FC as Japanese 4 cyclinders with 4 valves each. Could dual vvti be marketing strategy or product deficiency compensation?

 

Dual VVTI has been around for a very long time already. However, its previously restricted to more high end Toyota cars like Altezza (using the 3SGE BEAMS engine) and Celica with the 2ZZGE engine.

 

Now this technology is just coming down to more mainstream levels. An engine with dual VVTI is definitely better than w/o. Its not a gimmick. VVTI does work and is used by literally all car maunfacturers under different name (eg. MIVEC for Mitsubishi etc).

 

Take note that some more advance systems controls both cam phasing and lift. Eg. BMW valvetronic, Toyota Valvematic, Porsche VarioCam Plus....etc.....

[Good-Carbuyer]

Dual VVTI has been around for a very long time already. However, its previously restricted to more high end Toyota cars like Altezza (using the 3SGE BEAMS engine) and Celica with the 2ZZGE engine.

 

Now this technology is just coming down to more mainstream levels. An engine with dual VVTI is definitely better than w/o. Its not a gimmick. VVTI does work and is used by literally all car maunfacturers under different name (eg. MIVEC for Mitsubishi etc).

 

Take note that some more advance systems controls both cam phasing and lift. Eg. BMW valvetronic, Toyota Valvematic, Porsche VarioCam Plus....etc.....

Let us hope they can do better FC than 28.83km/L my previous Hyundai Accent 1.5L did.

[Mini-itx2010]

Let us hope they can do better FC than 28.83km/L my previous Hyundai Accent 1.5L did.

 

This I don't know. Cause FC is not determined but just engine alone. ECU mapping, transmission, weight, drag etc. all contribute to FC. There is also the right foot factor.

 

Dual VVTI is not going to give you tremedous improvement over single VVTI, I would say just around 5-8% more only. If can hit 10% better FC considered very good already.

[Good-Carbuyer]

This I don't know. Cause FC is not determined but just engine alone. ECU mapping, transmission, weight, drag etc. all contribute to FC. There is also the right foot factor.

 

Dual VVTI is not going to give you tremedous improvement over single VVTI, I would say just around 5-8% more only. If can hit 10% better FC considered very good already.

Detouring traffic jams = 2km/L better FC (25% for the route I commute to work and back home)

[Bulls_is_back]

The 2ZZGE is VVTL-i, a dual camshaft profile system similar to i-VTEC.

 

The 1998 version of the 3S-GE found in the Altezza RS200 came with dual VVT-i (variable timing on both the intake and exhaust cams). I believe this is probably the first Toyota implementation of the Dual VVT-i system. These make around 200hp stock on paper.

 

[Keithchue]

nope...i tested the JAZZ and ALtis side by side, i feel that jazz delivers the power better, it should be the 5at box that they have, altis just strains the engine. smoother delivery of power... both test drives carry about the same weight...

[Expertz]

altis as fast as 1.8 civic?

seriously? 2.5L altis out in the market already ah?

 

altis was never known to be a fast car, civics on the other hand are always slightly faster than cars of their same category

for a 1.6L altis to match a 1.8L civic, either the altis has a turbo inside or the altis must have a 2.5L engine

[Jchuacl]

2zzge only has variable intake valve timing system and does not have it for the exhaust valve.

 

Dual VVTI has been around for a very long time already. However, its previously restricted to more high end Toyota cars like Altezza (using the 3SGE BEAMS engine) and Celica with the 2ZZGE engine.

 

Now this technology is just coming down to more mainstream levels. An engine with dual VVTI is definitely better than w/o. Its not a gimmick. VVTI does work and is used by literally all car maunfacturers under different name (eg. MIVEC for Mitsubishi etc).

 

Take note that some more advance systems controls both cam phasing and lift. Eg. BMW valvetronic, Toyota Valvematic, Porsche VarioCam Plus....etc.....

 

[Mini-itx2010]

2zzge only has variable intake valve timing system and does not have it for the exhaust valve.

 

Thats the 1ZZFE thats single VVTI used in Celica SS1. The SS2 Celica uses 2ZZGE that has dual VVTLI. Its has both variable valve timing + lift. Its the most advance of any VVT implementation by Toyota. Sadly, it doesn't meet EuroIV emissions and Toyota discontinued it.

 

Howeer Lotus is still using the 2ZZGE including a supercharged version. So the Exige you see today are all Toyota powered!