GT4 Question about CVT gearboxes

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Quattro

Quattro

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hi all,

Here's a, I believe, unasked question... Are the CVT gearboxes like on the Honda Jazz (Fit) and Toyota Prius finally how they should be?? :indiff:

When you drive a Jazz in GT: P or Concept 2002, you can't accelerate on e.g. 3000rpm, you have to redline it to move on!?! :yuck:

Are they propper CVT's now?

Thanx in advance

Quattro
 
Well, I have not tried the Prius, but one of my friends has been driving that open-wheel electric Toyota, and it only has one gear.
 
the open wheel electric toyota probably not fitted with a CVT. Electric step motors do not require gears as normal combustion engines do.
 
Indeed, in Prologue there was this Toyota car with only one gear.... fast but pretty boring :)
Still no GT4 owner who can answer my question? :)
 
Well it's not that CVT = 1 gear. As a matter of fact CVT = infinite gears.
 
Well, I tried the Prius, and the way it seems to work is that you hear the RPMs rise as you accelerate until it is close to redline, then it just stays there and you keep accelerating. Unless you lose too much speed, it will always stay at the high RPMs if you let off and then get back on it. Does that sound like how it is supposed to work?
 
Do you ever have to shift though? How a CVT works is the gearing can be changed to keep the engine in the optimal power band, by having effectively an infinite number of gears to select from. What you describe Neuro sounds correct, but I'm not all that familar with CVTs.

And I know of some electric cars with multiple gears. I've spoken with the designer of one, the two seater with the passenger behind the driver, quite a small car, looks kinda goofy, but has 1000 ft/lbs of torque... its insane off the line.
 
neurokinetik
Well, I tried the Prius, and the way it seems to work is that you hear the RPMs rise as you accelerate until it is close to redline, then it just stays there and you keep accelerating. Unless you lose too much speed, it will always stay at the high RPMs if you let off and then get back on it. Does that sound like how it is supposed to work?
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The point of a CVT is, as stated before, that you can always accelerate at the optimum revs... so you can accelerate to 100kph with a continous 3000rpm if you're in no race :) , or you can give it some stick and put it continiously at 6000rpm if you're in a hurry :)

The point is... in GT p or GTC you can only accelerate at the redline... which is stupid!! Only the Prius in GT p is decent...
 
If you take the Nissan race care in GTC.... that one is really special. It uses a CVT but with 7 defined gearings. In each of those gearings there is still CVT principle. It feels rather strange. But the benefits are obvious. The car accelerates like a rocket.

http://image.i-bbs.sijex.net/bbs/gt4/1104741064358o.jpg

that car I ment.
 
Quattro
The point of a CVT is, as stated before, that you can always accelerate at the optimum revs... so you can accelerate to 100kph with a continous 3000rpm if you're in no race :) , or you can give it some stick and put it continiously at 6000rpm if you're in a hurry :)

The point is... in GT p or GTC you can only accelerate at the redline... which is stupid!! Only the Prius in GT p is decent...
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I'll have to try accelerating at less than WOT next time, because maybe it does let you accelerate at the lower RPM, I just didn't drive it that way.

Azuremen
Do you ever have to shift though? How a CVT works is the gearing can be changed to keep the engine in the optimal power band, by having effectively an infinite number of gears to select from. What you describe Neuro sounds correct, but I'm not all that familar with CVTs.
Click to expand...

With the CVT in the Prius, you don't shift. There isn't even an option for it.

The other interesting thing about the Prius is the HUD. It is totally different than most of the cars in the game, showing your fuel efficiency, etc. And it has this icon on the left that looks like the dashboard of the Pod Racer from Star Wars Ep. 1. :lol:
 
I know you can't shift a CVT. I was asking to verify if it was a CVT.

Seems they copied the rather unique gauge and display system found in the Prius in real life as well.
 
you can shift a CVT. It's a matter of programming the thing into fixed ratios. The positive effects are extremely smooth gear switching.

In 1997 I graduated at Van Doorne's Transmissions in the Netherlands for my study at the University. During that time they had a video of the Williams F1 team testing with a CVT. The car was 2-3 seconds faster than the normal geared car. As Williams was the dominant team during that time allready, the Formula 1 organisation decided that all automatic shifting was banned from that time. But I can tell you one thing, it is absolutly godsmacking weird to not hear a drop in RPM when an F1 car enters a corner.
 
Thank you for the information. That would make sense, since as you stated, its a matter of programming...

And that would be unnerving... not hearing a drop in revs when going into a corner.
 
CVT's can be extremely comfortable. And that is it's problem. People expect a slight kick in the but during gear changing.

The most common application of CVT is to enable automatic gear changing with high level of comfort. But it can be altered with the electronic controlled hydraulics to make it act like a normal hand geared or conventional automatic transmission.

In the early days of CVT it built op a very bad reputation as a women's car. It was first used broadly in the Dutch car DAF. Very small cars with very small power. They wrote history as they could go as fast backwards as they did run forward. In Holland the held races with these cars cars till the late 80's. You can imagine it was quite funny to see. But deadly for the reputation of the concept op CVT.

Personally I like a manual shifted car better than a CVT. My brains need the link between more engine noise and acceleration. It's like a drug. It's why I like playing GT so much.
 
The Skyline GT-8 oughta be interesting. It uses a CVT that has been programmed to have 8, yes 8 gears shifted manually. I believe it can also be set in normal CVT mode as well. I wonder if we'll be able to switch between the two in game?
 
In GT4, the CVT in the Honda Jazz doesnt really work 100% correctly. Most of the time you have to floor it to get any acceleration whatsoever- causing the RPM to hang a few hundred revs shy of redline. Very annoying to hear that constant screaming of the engine.
 
F-Fifty
In GT4, the CVT in the Honda Jazz doesnt really work 100% correctly. Most of the time you have to floor it to get any acceleration whatsoever- causing the RPM to hang a few hundred revs shy of redline. Very annoying to hear that constant screaming of the engine.
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Well, that is the exact same thing that my wife's Jazz does... If I put the foot down it automatically jumps to close to the redline before it even starts moving.

It makes perfect sense that the car revs up to the point where there is max torque from the get go. It accelerates faster that way.

It is weird if you are not used to it but it is what is meant to do.

The whole CVT experience is weird the first few times. You find yourself speeding quite often because you subcontiously expect the revs to rise, get the kick from the upshift and then the revs to be lower. Since there is no kick you keep on pressing the gas pedal and the next thing you know you are doing 60MPH in a 45 Zone... :-)
 
Quattro
Indeed, in Prologue there was this Toyota car with only one gear.... fast but pretty boring :)
Still no GT4 owner who can answer my question? :)
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alot like driving automatic... not very involving 👎
 
I drive a Fit irl... and I love taking the fit around in GT4... They've pretty much got it spot on...
 
Mr.Slow
Well, that is the exact same thing that my wife's Jazz does... If I put the foot down it automatically jumps to close to the redline before it even starts moving.

It makes perfect sense that the car revs up to the point where there is max torque from the get go. It accelerates faster that way.
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It makes sense only if you want the best possible acceleration at the expense of shortened engine and transmission life and much poorer fuel economy. It doesn't, however, make sense under normal driving conditions. In the game, you simply won't go anywhere unless you go full throttle. I can't imagine a real life car lasting very long if it needs to be near redline to simply accelerate, be it slowly or even moderately :)
 
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