Cvt? Vvt? Cvvt?

[yahoo1z]

what is the difference between cvt, vvt, and cvvt? i have a 2001 elantra gt, which technology does my engine have. asking so i can get the right badge from kspec, thanks.

[PSUsouthpaw]

the 2001 has none of these. VVT stands for variable valve timing, and CVVT adds the word continuous to it.

2004 and up Elantras have it, and it is similar, though not as effective as the VTEC technology that Honda uses (similar technology/theory) Unfortunately, The Hyundai CVVT doesn't milk as much power out of it as the Honda tech does...and there is currently no way to control the cvvt (like a VTEC controller)

[n0c]

Unfortunately you have non. Only 2003+ Elantras have CVVT. You could still buy the badge though lol.

[05xd]

the 2001 has none of these. VVT stands for variable valve timing, and CVVT adds the word continuous to it.

2004 and up Elantras have it, and it is similar, though not as effective as the VTEC technology that Honda uses (similar technology/theory) Unfortunately, The Hyundai CVVT doesn't milk as much power out of it as the Honda tech does...and there is currently no way to control the cvvt (like a VTEC controller)
Honda's V-TEC actually has a third cam lobe for higher lift.
Hyundai's CVVT just adjust the valve timing not the lift

[txdproject]

fortunately you have the engine that if your considering a turbo is a good .... most kits are easier to get your hands on. cvvt is good im not knocking it buutttt if your going down the land of the turbo or maybe even supercharging you run into lots of problems.

[yahoo1z]

i also saw a cvt badge. what is cvt? does it mean constant valve timming?

[03SilverBullet]

the 2001 has none of these. VVT stands for variable valve timing, and CVVT adds the word continuous to it.

2004 and up Elantras have it, and it is similar, though not as effective as the VTEC technology that Honda uses (similar technology/theory) Unfortunately, The Hyundai CVVT doesn't milk as much power out of it as the Honda tech does...and there is currently no way to control the cvvt (like a VTEC controller)
Some late model 2003's have the CVVT, mine does for example.

[BColeman]

HMMM... I haven't personally heard of the CVT, though I remember seeing a badge on kSpec.com. It might not be related to Elantras, but some other Hyundai vehicle.

[05TidalWave]

CVT...

Although there are different variations on the CVT theme, most passenger cars use a similar setup. Essentially, a CVT transmission operates by varying the working diameters of the two main pulleys in the transmission.

The pulleys have V-shaped grooves in which the connecting belt rides. One side of the pulley is fixed; the other side is moveable, actuated by a hydraulic cylinder. When actuated, the cylinder can increase or reduce the amount of space between the two sides of the pulley. This allows the belt to ride lower or higher along the walls of the pulley, depending on driving conditions, thereby changing the gear ratio. If you think about it, the action is similar to the way a mountain bike shifts gears, by "derailing" the chain from one sprocket to the next — except that, in the case of CVT, this action is infinitely variable, with no "steps" between.

The "stepless" nature of its design is CVT's biggest draw for automotive engineers. Because of this, a CVT can work to keep the engine in its optimum power range, thereby increasing efficiency and gas mileage. A CVT can convert every point on the engine's operating curve to a corresponding point on its own operating curve.

From Edmunds

[BColeman]

AWWW, Yes! Ooooh how I love intelligence. Great work man, that was a nice find.

So essentially, the CVT badge he has found is for those Automatic owners out there wanting some fancing badging. :D

[Keyan]

AWWW, Yes! Ooooh how I love intelligence. Great work man, that was a nice find.

So essentially, the CVT badge he has found is for those Automatic owners out there wanting some fancing badging. :D

No. CVT is a constant variable transmission. It's like having one gear. Engine is always in torque range. Civic HX has it. Nissan Murano has it. Couple other cars have it. it is NOT an automatic transmission

[05TidalWave]

He means auto in the fact that you do not s-hift. TO me, that is an automatic, no manual clutch, no shifting 1-5/7-R = Automatica.

[BColeman]

Constant Variable Transmission = Automatic Transmission

CVT is to Automatic, as 5 speed is to Manual

[fgummett]

we're really getting into semantics here... :rolleyes: the way I see it is that the first transmissons were manual and needed the driver's interventon to change the gears (Manual Transmission) . Later some bright spark invented a way of automatically changing the gears (Automatic Transmisson). CVT does not have gears but instead is a system that makes it possible to vary progressively the transmission ratio. So it allows selection of a infinite number of ratios, (between a minimum and a maximum value). In some systems this uses belts and pulleys. But in as much as you don't need a clutch pedal or gear lever or driver intervention it is like an Automatic Transmission :)

[Kenshin]

*edit* - You beat me to it Fgummet

Technically, no. A traditional Automatic Transmission still has different gear ratios that it automatically shifts between while driving. A CVT (Continuously Variable Transmission) has NO gears or set gear ratios to switch between. By having a V-belt between two pulleys that vary width depending on RPM's, it creates a smooth, seamless transition between it's starting (low) drive ratio to it's final drive ratio, effectively keeping the engine in it's power band at fairly constant revs throughout acceleration while the transmission varies the output ratio to increase vehicle speed, rather than the engine's RPM's rising, then falling as it shifts, then rising, then falling as it shifts... If you've ever ridden a scooter (moped) you'll understand the difference between a traditional auto trans and a CVT.

BUT, to answer the question at hand, your car has none of these three technologies, so putting any of these badges on it = rice.

[05TidalWave]

In the end, no shifting manually = automatic.

[fgummett]

In the end, no shifting manually = automatic.Perhaps that is what it means to you. :) You can Manually shift an Automatic so by your definition that is what then..? There are Manual boxes that have an "automatic" clutch and will shift Automatically or when you flip the flappy-paddle things, there are Shiftronics etc... it's not as simple as that :rolleyes:

[OPZ]

If there is no point at which you manually control the clutch of the car. Its an automatic. If you have a direct involvement of dis-engaging and re-engaging the transmission parts, its a manual. How I see it and why im going to be pissed in the future with these stupid *** automatics.

[KeWLKaT]

This is the way i see it.

3 pedals -> manual

Anything else -> garbage

[05xd]

This is the way i see it.

3 pedals -> manual

Anything else -> garbage
w0rd!
Thats the same thing I was thinking

[Keyan]

This is the way i see it.

3 pedals -> manual

Anything else -> garbage


F1-style-flappy-paddle-gearbox >>>>> all

[BColeman]

Okay, Okay, I get the picture. Though it's semantics, it's still an automatic.

I was reading up on the Dodge Cailber, and they've got the CVT available, though they didn't go into too much detail.

So, does that mean "gear selection" is basically: P, R, N, D, and that's it. Or does it even have a neutral per se.

[mtlelantra]

Yeah, it has a N. Those belt-driven CVTs are pretty crappy from what I've read... you can't tow anything and they're supposedly twice as expensive to fix...

[fgummett]

Yeah, it has a N. Those belt-driven CVTs are pretty crappy from what I've read... you can't tow anything and they're supposedly twice as expensive to fix...They have come and gone before... Volvo tried one in a small car many years ago. I was wondering if they were any better this time around. There's some history here : http://en.wikipedia.org/wiki/Continuously_variable_transmission

[Blastation]

quick question, so how can we tell if you have a cvvt or vvt i think that is what he is asking.

[mtlelantra]

late (generally Californian) 03 models and 04+ use cvvt.

[fgummett]

quick question, so how can we tell if you have a cvvt or vvt i think that is what he is asking.I believe that the question was already answered early on in this thread :rolleyes:

[SuperGLS]

Listen to fgummett, he has everything explained perfectly.

This is the way i see it.

3 pedals -> manual

Anything else -> garbage

That sounded like it was out of F&F, don't ever say it again, ha!

[03SilverBullet]

This is the way i see it.

3 pedals -> manual

Anything else -> garbage
Did you ever think that people (like me) dont like the idea of shifting all the time? Your statement is your statment but IMO its BS. Just because I dont like manual doesnt mean im gonna say its garbage.