CVT Transmission

Zsteve · 02-19-2010, 02:34 PM

can u still get the paddle controls with cvts? meaning is it just an auto or cna they do like the Z and allow the driver to shift too?

Vegasboricua · 02-19-2010, 02:46 PM

I don't know of any Nissan with a CVT with paddles so my guess would be no.

Crash · 02-19-2010, 02:59 PM

The torque limitations are based on the standard CVT style. However, a "chain" version was patented by Larry Anderson that would allow for extremely high amounts of torque based on a chain instead of a belt. The system used "floating sprocket bars" that would allow dynamic sprocket distance selection between the chain and sprocket. Built out of strong metals, this would prove to handle over 1000Lbs/tq.

Anderson was working on fatigue testing last time I'd talked to him. I think his son took over the project and they were scheduled to talk to some large auto manufacturers (I believe GM was one of them). I don't know what happened after that, but I've seen videos of the prototype working and it's pretty interesting. His domain has been taken down since, so he may have sold the patent and it may have been buried.

You can see the prototype of it at 1:17 in this video:

On a side note, CVTs are pretty boring, but if you couple it with an electric motor producing a lot of torque, it'd be far less boring because it'd be a "hold on tight and hit the gas" type situation. Personally I prefer a manual over anything, but there's pros and cons to everything.

Vegasboricua · 02-19-2010, 04:44 PM

Quote:

Originally Posted by Crash

The torque limitations are based on the standard CVT style. However, a "chain" version was patented by Larry Anderson that would allow for extremely high amounts of torque based on a chain instead of a belt. The system used "floating sprocket bars" that would allow dynamic sprocket distance selection between the chain and sprocket. Built out of strong metals, this would prove to handle over 1000Lbs/tq.

Anderson was working on fatigue testing last time I'd talked to him. I think his son took over the project and they were scheduled to talk to some large auto manufacturers (I believe GM was one of them). I don't know what happened after that, but I've seen videos of the prototype working and it's pretty interesting. His domain has been taken down since, so he may have sold the patent and it may have been buried.

You can see the prototype of it at 1:17 in this video:

On a side note, CVTs are pretty boring, but if you couple it with an electric motor producing a lot of torque, it'd be far less boring because it'd be a "hold on tight and hit the gas" type situation. Personally I prefer a manual over anything, but there's pros and cons to everything.

Hmm Intresting....

kdoske · 02-19-2010, 07:48 PM

cool vid. cvt's are not there yet, maybe in the future though

HKYStormFront · 02-19-2010, 09:58 PM

Quote:

Originally Posted by Zsteve

can u still get the paddle controls with cvts? meaning is it just an auto or cna they do like the Z and allow the driver to shift too?

yes there are some that have paddle shifters and simulate the feeling of shifting gears but it's still mushy and kinda defeats the purpose of the CVT. although i understand the concept of CVT and it seems like a good idea really (especially for battery power only cars) i think i'll stick to tradition manuals, autotragics and DSG-style dual clutch auto manuals (GTR, porsche PDK, etc)

OldGuy · 02-19-2010, 10:11 PM

Quote:

Originally Posted by Zsteve

can u still get the paddle controls with cvts? meaning is it just an auto or cna they do like the Z and allow the driver to shift too?

My CVT Altima coupe has a manual shifting feature on the floor tied into the automatic floorshift. It's weird to shift a CVT transmission as it doesn't have actual forward gears.

ChrisSlicks · 02-20-2010, 10:19 AM

Yeah shifting a CVT through virtual gears is pointless and just slows you down. Although CVT's sound weird to us enthusiasts they allow you to harness maximum engine power. Think of the scenario of sitting on the starting line of a drag strip, you launch pretty traditionally and the revs quickly shoot up to near red-line ... and stay there for the entire trip down the strip. You just ran the 1/4 with your engine producing maximum HP for almost the entire length. With a traditional gearbox, be it manual or automatic, you are cycling between 70% and 100% and are only at that 100% peak for a split second before having to go back to 70% power.

As far as chain drive CVT goes, I believe it is already in use by the likes of Audi and Subaru and possibly others. It's the future of automatics.

HKYStormFront · 02-20-2010, 10:58 AM

it feels like your driving a boat tho... at least it sounds that way lol

it looks good on paper... but so do wankel's

mick · 02-20-2010, 11:38 AM

in the old days, one would focus and adjust the light when taking a photograph. the modern cameras got rid of all that. one day, the modern cars probably would do the same to the manual transmission.

HKYStormFront · 02-20-2010, 11:54 AM

Quote:

Originally Posted by mick

in the old days, one would focus and adjust the light when taking a photograph. the modern cameras got rid of all that. one day, the modern cars probably would do the same to the manual transmission.

i still MF when the situation allows and i still shoot full manual mode. even tho i have a very technologically advanced DSLR, it still doesn't know what I want it to do sometimes, especially when it comes to exposure. so in that way, perhaps a true manual trans will never be replaced. having said that, see my above post about dual clutch automated manuals.

Montez · 02-20-2010, 12:46 PM

Quote:

Originally Posted by Vegasboricua

I don't know of any Nissan with a CVT with paddles so my guess would be no.

New Max has same paddle shifters as Z, and a similiar steering wheel and dash. Now as far as torque/power if they wanted to "doubtful although" they could incorporate this tranny into the Z........It could handle the Z's 270ft/lb of torque which is only 9 more ft/lbs than the Max which has 261ft/lb of torque.

DIGItonium · 02-20-2010, 05:07 PM

Quote:

Originally Posted by nogoodname

The CVT lacks the excitement. It's just so boring. Nissan would never put that in their performance cars. Good thing Infiniti's don't have CVT's.

Quote:

Originally Posted by HKYStormFront

only CVT's that nissan makes that i know of right now are for FWD anyway...

Close... Japan's Skyline (our G35) with 8spd CVT.
Nissan Skyline GT-8 | First Drives | Car Reviews | Auto Express

OldGuy · 02-20-2010, 05:45 PM

I think it's a pleasure on the right kind of car---smooth and glides.

Modshack · 02-20-2010, 06:00 PM

Quote:

Originally Posted by OldGuy

I think it's a pleasure on the right kind of car---smooth and glides.

I'm an old guy too, but I don't find that interesting or enjoyable in the least... Maybe when I'm 80 and driving a Buick, but certainly not now at a mere 60....

02-19-2010, 02:34 PM	#16 (permalink)
Zsteve A True Z Fanatic Join Date: Sep 2009 Location: TX Posts: 3,298 Drives: the 2 balled club Rep Power: 22	can u still get the paddle controls with cvts? meaning is it just an auto or cna they do like the Z and allow the driver to shift too? __________________ 2010 LS3 C6 Silver coupe corvette

02-19-2010, 02:46 PM	#17 (permalink)
Vegasboricua Track Member Join Date: Jan 2010 Location: North Las Vegas Age: 36 Posts: 697 Drives: 10 370Z PW M6 BASE Rep Power: 597	I don't know of any Nissan with a CVT with paddles so my guess would be no. __________________ // K&N Drop Ins // Illuminated Kick Plates // 35% Tints // [ Facebook \| Twitter ]

02-19-2010, 02:59 PM	#18 (permalink)
Crash A True Z Fanatic Join Date: Dec 2008 Location: Los Angeles Posts: 1,853 Drives: 02 Corvette Z06 Rep Power: 590	The torque limitations are based on the standard CVT style. However, a "chain" version was patented by Larry Anderson that would allow for extremely high amounts of torque based on a chain instead of a belt. The system used "floating sprocket bars" that would allow dynamic sprocket distance selection between the chain and sprocket. Built out of strong metals, this would prove to handle over 1000Lbs/tq. Anderson was working on fatigue testing last time I'd talked to him. I think his son took over the project and they were scheduled to talk to some large auto manufacturers (I believe GM was one of them). I don't know what happened after that, but I've seen videos of the prototype working and it's pretty interesting. His domain has been taken down since, so he may have sold the patent and it may have been buried. You can see the prototype of it at 1:17 in this video: On a side note, CVTs are pretty boring, but if you couple it with an electric motor producing a lot of torque, it'd be far less boring because it'd be a "hold on tight and hit the gas" type situation. Personally I prefer a manual over anything, but there's pros and cons to everything. __________________ 2002 Corvette Z06 - Totaled 2003 Corvette Z06 50th Anniversary

02-20-2010, 10:19 AM	#23 (permalink)
ChrisSlicks A True Z Fanatic Join Date: Mar 2009 Location: North East Posts: 6,203 Drives: 09 370Z Sport M6 Rep Power: 653	Yeah shifting a CVT through virtual gears is pointless and just slows you down. Although CVT's sound weird to us enthusiasts they allow you to harness maximum engine power. Think of the scenario of sitting on the starting line of a drag strip, you launch pretty traditionally and the revs quickly shoot up to near red-line ... and stay there for the entire trip down the strip. You just ran the 1/4 with your engine producing maximum HP for almost the entire length. With a traditional gearbox, be it manual or automatic, you are cycling between 70% and 100% and are only at that 100% peak for a split second before having to go back to 70% power. As far as chain drive CVT goes, I believe it is already in use by the likes of Audi and Subaru and possibly others. It's the future of automatics. DEpointfive0 likes this.

02-20-2010, 10:58 AM	#24 (permalink)
HKYStormFront A True Z Fanatic Join Date: Apr 2009 Location: Greer, SC Posts: 14,954 Drives: 06 Frontier SE 6spd Rep Power: 52	it feels like your driving a boat tho... at least it sounds that way lol it looks good on paper... but so do wankel's DEpointfive0 likes this. __________________ Patrick // 06 Frontier 6spd Nismosis // Mods: Uprev Tuned @ Z1 Motorsports: 257whp & 292 ft lbs 09 Pontiac G8 GXP // M6 // Sunroof // Tint... For now

02-19-2010, 07:48 PM	#20 (permalink)
kdoske Track Member Join Date: Jul 2009 Location: Louisiana Posts: 541 Drives: 800whp Unicorn FI Z Rep Power: 17	cool vid. cvt's are not there yet, maybe in the future though

02-20-2010, 11:38 AM	#25 (permalink)
mick Track Member Join Date: Jan 2010 Location: California Posts: 903 Drives: Used to drive a 370z Rep Power: 16	in the old days, one would focus and adjust the light when taking a photograph. the modern cameras got rid of all that. one day, the modern cars probably would do the same to the manual transmission. DEpointfive0 likes this.

02-20-2010, 05:45 PM	#29 (permalink)
OldGuy Base Member Join Date: Dec 2009 Location: Greensburg PA Posts: 899 Drives: '09370Z Red Base A7 Rep Power: 16	I think it's a pleasure on the right kind of car---smooth and glides.

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