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 CVT(CHAT), User may share your exprience here.

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Boy96
post Aug 13 2014, 11:17 PM

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QUOTE(dstl1128 @ Aug 13 2014, 10:54 AM)
Very common. Saw it everytime with the brake light so bright on my face. That's why we have so many gearbox failure eg, DSG, CVT, AT, MT (not gearbox but clutch wear fast), yes even MT some pple just engaged in 1 and on the pressed on the clutch that long.
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Not really, for me I put it to N while pressing my brake, too lazy to pull up the handbrake..
cskean
post Aug 13 2014, 11:25 PM

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I always change my CVT fluid every 20k km, so far still working strong(touch wood).

And I always shift to N and press brake.

If the waiting time is too long, I just use handbreak...


syahmie8
post Aug 14 2014, 04:13 AM

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hi guys, anyone have change cvt oil of saga flx outside proton service centre? how much the cost? oil brand used? thank you.
dstl1128
post Aug 14 2014, 08:12 AM

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QUOTE(briantft @ Aug 13 2014, 10:24 PM)
The CVT for Prius is using timing chain so no replacement nor rubber effect will be detected; transmission fluid is WS grade so no need to change within the lifespan of the car, but if you want to get it replace every 100k km, be my guess...
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Not even a chain. It is more similar to an auto than CVT.

And that WS no need to change bullshit from UMW... doh.gif Reached 80k km and that WS bright pink becomes a pure black (and stinky smells)... more couldy than engine oil from LM MoS2.

Icetea87
post Aug 14 2014, 08:27 AM

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QUOTE(briantft @ Aug 13 2014, 10:24 PM)
To be honest bro, i think it is really the saga's cvt only, not all the cvt are behaving like that. So far, i have driven only 2 types of cvt before, the Prius E-CVT and Altis's 7 speed CVT, so i can only tell the characteristics of these 2 cvts. For Prius's CVT, you can't feel the gear switching and changing like you normally will feel from normal AT or DCT/DSG. This, you got no feeling at all. At first, i though it was slow but when i tested it with OBD and apps, it shows from 0-100km/h, within 10 second. Well, it is not sports car fast but i can say it is relatively fast, with 1425kg in weight. If you floor the accelerator pedal, no tyre spinning will happen caz of traction control and VSC, you don't get to spin the tyre. Then if you look at dashboard, the speed shown will jump quite fast and suddenly, you reached 150km/h. The CVT for Prius is using timing chain so no replacement nor rubber effect will be detected; transmission fluid is WS grade so no need to change within the lifespan of the car, but if you want to get it replace every 100k km, be my guess. It is exceptionally quiet, smooth, powerful and not so fun to drive like manual or DSG/DCT but if you opt for something comfortable for you and ur passenger, or piece of mind during busy traffic period, CVT is a very good choice.
Altis's CVT is 7 speed but Toyota has made a kinda funny "features" and for some reasonss, UMW added a simulated gear changing sound whenever you press the gas pedal to imitate the gear changing incident like normal AT has, but you dun get the feel of gear changing but only the gear changing sound. For CVT, gear ration basically is quite wide, though Altis's cvt is 7 speed but still, because of the unique characteristics of cvt, gear changing can't really be felt. This 7 speed cvt is relatively smooth, no jerky nor lag in power, easy control and transmission of power is almost instant, whenever you press the gas pedal, the engine and transmission will feed the car up to the speed that you want, say overtaking other vehicle is easy, no delay and fast.
Between car with AT, DSG/DCT and cvt, i will go for cvt over the other 2 options. Only if the reliability and durability of DSG/DCT has significant improved, no way i will go for it though they are the most fun to drive. No offense to P1, but my dad's saga also have the same behavior like you have described. Once compare with the CVT in Prius and Altis, i am curious as well why so much different between Toyota and P1.
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bro, thanks for the detail write up of the cvt from diff manufacturer. So far i have no experience in driving both of the toyota's mentioned but i did ride in one of the prius taxi in singapore and i have to agree with you that the ride of the prius is smooth and the vehicle move forward with no sign of jerkiness even in low speed.

as for driving experience, i only manage to test drive the previous version slyphy and preve. As for the slyphy I found that the ride was smooth and the pick up was rather 'mild' for a 2.0 car , (maybe i am so used to my manual mazda 323 that i own before the saga , shift down and rev up, can feel the 'push back' feeling biggrin.gif).
As for the preve, i do not feel the same feeling of lacking power that i found in my saga. Maybe the engine is much more powerful.

The other forumers here are right, some young blood like me do not know appreciate the 'smoothness' yet.

i am looking forward to test drive those cvt rather than my current ride. i think only then i will appreciate the cvt advantages of a real CVT. proton cvt esp for the saga.....i rest my case. only hope i have is to change the car as soon as i can.
Icetea87
post Aug 14 2014, 08:34 AM

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QUOTE(Matrix @ Aug 13 2014, 12:32 PM)
1) I don't think power delivery is that slow...it's just perception, more likely like 0.5 to 1 second. For my Inspira...going from 120km - 160km/h is really fast...My City also accelerate pretty fast. No complains at all...its more engine issue than CVT characteristic.

2) Engine rough sound - Again Engine issue....not CVT.

3) Jerkiness - This might be Punch CVT issue or need tuning....doesn't experience any jerkiness with Inspira or City.

4) FC - The gearbox can only do so much, if stuck in jam, any car also die....but Campro engine is known fuel sucker. However, if you put CVT in the similar cars, you can get better FC...ex: City vs VIOS vs Almera....City winrar in FC, as proven in PaulTan's test. All 1.5L engine, not the latest engines...VIOS especially ancient...LOL.
I think most of the things you highlight is an Engine issue rather than typical CVT characteristic for fair comparison.
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bro, thanks for the reply.

from the way i see it, inspira use engine and gearbox that was tune from mitsu. and the mitsu engineers get it right.

fuel consumption of my 1.3 campro really can fight with a 2.0 hahaha....thinking of it right now, make me think why i didn;t get the myvi or any older 1.8 or 2.0 used before i buy the saga. *regret*

Icetea87
post Aug 14 2014, 08:38 AM

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QUOTE(efaceninja @ Aug 13 2014, 12:34 PM)
I think this should mostly attribute to the campro engine rather than cvt?
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campro certainly lack the refinement and efficiency of other engine esp the 1.3 one.
SUSMatrix
post Aug 14 2014, 08:45 AM

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QUOTE(Icetea87 @ Aug 14 2014, 08:34 AM)
bro, thanks for the reply.

from the way i see it, inspira use engine and gearbox that was tune from mitsu. and the mitsu engineers get it right.

fuel consumption of my 1.3 campro really can fight with a 2.0 hahaha....thinking of it right now, make me think why i didn;t get the myvi or any older 1.8 or 2.0 used before i buy the saga. *regret*
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Inspira sucks fuel in city also...normal about 7km/l for me coz I drive short distance and heavy jam at Bandar Utama/Ldp/Kota Damansara .Can go even lower when in stand still traffic....but since its 2.0l, ok lah.

Surely your saga is better?
Icetea87
post Aug 14 2014, 08:58 AM

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QUOTE(Matrix @ Aug 14 2014, 08:45 AM)
Inspira sucks fuel in city also...normal about 7km/l for me coz I drive short distance and heavy jam at Bandar Utama/Ldp/Kota Damansara .Can go even lower when in stand still traffic....but since its 2.0l, ok lah.

Surely your saga is better?
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so far, the best fuel consumption i ever get from my car was 17 cents/ km which translate to 12.35 km/l for a 70% highway and 30% town driving. Ipoh to seremban .... 90-120 kmh all the way.

worst fuel consumption is 9-11 km/l when i drive to work from pj to kl back and forth to work. avg speed 30 km/h hahaha... no heavy rev, and try to minimize start and go as much as i can in slow traffic., just let the car glide in d

used to do a lot of high rev due to lack of power but i didn;t measure the fuel bill but the needle sure drop very fast.

7km/l for a 2.0 car comfort. I think it is worth it. Maybe i will be wrong. Wait till i own a 2.0 then i will know .

This post has been edited by Icetea87: Aug 14 2014, 09:10 AM
efaceninja
post Aug 14 2014, 10:10 AM

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QUOTE(briantft @ Aug 13 2014, 10:24 PM)
The CVT for Prius is using timing chain so no replacement nor rubber effect will be detected;
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Prius's transmission is not exactly a cvt as you know it. The name cvt (eCVT) is there just so the customer won't be too confused. And also, the rubber band effect is not because of the transmission using rubber/belting. It is because of the TCU unable to decide which ratio to use, and keep changing the ratio, and thus you feel the rubber band effect.
efaceninja
post Aug 14 2014, 11:29 AM

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QUOTE(briantft @ Aug 13 2014, 10:24 PM)
Altis's CVT is 7 speed but Toyota has made a kinda funny "features" and for some reasonss, UMW added a simulated gear changing sound whenever you press the gas pedal to imitate the gear changing incident like normal AT has, but you dun get the feel of gear changing but only the gear changing sound. For CVT, gear ration basically is quite wide, though Altis's cvt is 7 speed but still, because of the unique characteristics of cvt, gear changing can't really be felt. This 7 speed cvt is relatively smooth, no jerky nor lag in power, easy control and transmission of power is almost instant, whenever you press the gas pedal, the engine and transmission will feed the car up to the speed that you want, say overtaking other vehicle is easy, no delay and fast.
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CVT don't have '7-speed', '8-speed' per se. CVT has almost infinite number's of gear ratio. the 7-speed here on altis is actually just 7 virtual gear ratio that makes the cvt behaves like a 7-speed auto when you choose to, because it feels more sporty. under normal operation, CVT is smooth and there's no '7-speed' thing.

and for the simulated gear changing sound... Altis got this??? i'm not sure, never sit in the a 2014 Altis before. for me it sounds... very unlikely. hopefully other ppl can clarify.
efaceninja
post Aug 14 2014, 11:38 AM

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*double post

This post has been edited by efaceninja: Aug 14 2014, 11:45 AM
SUSmelvinho
post Aug 14 2014, 12:29 PM

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In Invecs III CVT also got stimulate gear changing
briantft
post Aug 14 2014, 01:23 PM

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QUOTE(efaceninja @ Aug 14 2014, 12:29 PM)
CVT don't have '7-speed', '8-speed' per se.  CVT has almost infinite number's of gear ratio.  the 7-speed here on altis is actually just 7 virtual gear ratio that makes the cvt behaves like a 7-speed auto when you choose to, because it feels more sporty.  under normal operation, CVT is smooth and there's no '7-speed' thing.

and for the simulated gear changing sound... Altis got this??? i'm not sure, never sit in the a 2014 Altis before.  for me it sounds... very unlikely.  hopefully other ppl can clarify.
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This is what i don't really understand why Toyota put the simulated gear changing sound, perhaps to ease the perception/curiosity/neverouness of driver in general regarding though AT, it will give you the sound (not the feel) of gear changing in AT but not CVT.
As for the CVT transmission, it does have certain sets of gear ratio (could be from 1.12 to 2.113 as for example for first gear/first set). It is wider and the ECU will have it selected as according to the input from driver (depends on the speed), which is different the AT with fixed gear ration. 7-speed CVT means it has a upper and lower gear ration to be selected as according to the input from driver, not really the definition of infinite as in math.
I am not sure about other variant of Altis caz here in MY we have 3 models, 1.8E, 2.0G & 2.0V, and i only find the simulated sound in 2.0V. To be honest, i find it really funny and something like "extra piece of fish" (in cantonese).....
briantft
post Aug 14 2014, 01:34 PM

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QUOTE(dstl1128 @ Aug 14 2014, 09:12 AM)
Not even a chain. It is more similar to an auto than CVT.

And that WS no need to change bullshit from UMW...  doh.gif  Reached 80k km and that WS bright pink becomes a pure black (and stinky smells)... more couldy than engine oil from LM MoS2.
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Hmmm, not getting the info from UMW but some of the 3rd generation pre-FL Prius owners went to inspect the transmission fluid and turn out it is still relatively clean. And also my Prius too, approaching 80k km and the fluid still can be considered as like new. I am not sure why, but compare to Camry and Vios, i realize Vios's transmission fluid tend to getting dirty and replacement of fluid needed like every 50k-60k. My last ride, Vios, i found the transmission fluid to be relatively dirty after just 60k km.
For my opinion, if after inspection and found the transmission fluid is dirty, get it replace. Overall cost will be less than RM500 including labor and new transmission fluid.
efaceninja
post Aug 14 2014, 02:12 PM

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QUOTE(briantft @ Aug 14 2014, 01:23 PM)
This is what i don't really understand why Toyota put the simulated gear changing sound, perhaps to ease the perception/curiosity/neverouness of driver in general regarding though AT, it will give you the sound (not the feel) of gear changing in AT but not CVT.
As for the CVT transmission, it does have certain sets of gear ratio (could be from 1.12 to 2.113 as for example for first gear/first set). It is wider and the ECU will have it selected as according to the input from driver (depends on the speed), which is different the AT with fixed gear ration. 7-speed CVT means it has a upper and lower gear ration to be selected as according to the input from driver, not really the definition of infinite as in math.
I am not sure about other variant of Altis caz here in MY we have 3 models, 1.8E, 2.0G & 2.0V, and i only find the simulated sound in 2.0V. To be honest, i find it really funny and something like "extra piece of fish" (in cantonese).....
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yes, CVT does has an upper end ratio and a lower end ratio. but in between, it is supposed to be almost infinite (limited by TCU i suppose), not just 7 speed. the 7-speed is only when you switch to "sport mode", instead of almost infinite gear ratio, the TCU set it to a pre-defined set of 7 ratio. If you but it in D, then its the almost infinite gear ratio mode. if you fully accelerate in normal CVT mode, you won't see the engine RPM goes up and down in between gear change, because there's no gear to change. instead, RPM just roar to 5k maybe 6k RPM, and hold there, while the speed keep going faster and faster.

and when you say "... for example for first gear/first set...", it means that your understanding on CVT is wrong already. CVT don't have first gear/first set, because, it only got ONE set. this ONE set can keep changing in diameter and thus the ratio.


this is my understanding on CVT gear. driven on old gen City's CVT and also CKD Jazz Hybrid's CVT.
briantft
post Aug 14 2014, 03:09 PM

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QUOTE(efaceninja @ Aug 14 2014, 03:12 PM)
yes, CVT does has an upper end ratio and a lower end ratio.  but in between, it is supposed to be almost infinite (limited by TCU i suppose), not just 7 speed.  the 7-speed is only when you switch to "sport mode", instead of almost infinite gear ratio, the TCU set it to a pre-defined set of 7 ratio.  If you but it in D, then its the almost infinite gear ratio mode.  if you fully accelerate in normal CVT mode, you won't see the engine RPM goes up and down in between gear change, because there's no gear to change. instead, RPM just roar to 5k maybe 6k RPM, and hold there, while the speed keep going faster and faster.

and when you say "... for example for first gear/first set...", it means that your understanding on CVT is wrong already.  CVT don't have first gear/first set, because, it only got ONE set.  this ONE set can keep changing in diameter and thus the ratio.


this is my understanding on CVT gear.  driven on old gen City's CVT and also CKD Jazz Hybrid's CVT.
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good info bro, btw, i will attach the simulated gear switching/changing of Altis's cvt. Pay attention about 2:00 onward:



Well, i can't tell for sure for every cvt, because there are many different setting of cvt, please refer to the link below for the variances of cvt as according to different manufacturer. For Toyota & Nissan, these 2 are adapting not so convention cvt set up as their CVTs are made up of a pulley system, with cones at each pulley, all connected by a chain belt. These cones move closer together or further apart to increase or decrease the diameter at which the belt operates. The ratio here is important, and is selected automatically based on factors like gas pedal position, vehicle speed and engine speed.

What all this means is that a CVT doesn’t shift at all like a traditional gearbox. The ratios are always changing in order to find the perfect combination for speed, fuel efficiency or both. They even come with buttons/OD/paddle swifter to help shift between pre-set ratios which helps mimic a traditional automatic. 



http://en.wikipedia.org/wiki/Continuously_...le_transmission

I am interesting to know more about Honda's cvt, Audi's multitronic or even Mitsubishi's INVECS. Different manufacturer has different setting on their cvt transmission which the philosophy behind is really interesting.

This post has been edited by briantft: Aug 14 2014, 03:23 PM
dares
post Aug 14 2014, 05:00 PM

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Proton's Punch CVT ie the ones in Saga/Preve uses a wet clutch, whereas those in Sylphy/Altis uses torque converter. So it stands to reason that a clutch-based transmission will definitely be less smooth and jerks more than that of a torque converter, especially during low speed. It has less to do with Campro being refined or not.

The reasoning behind using a wet clutch is for efficiency, as for how efficient it is....well it seems different people has different results.

I have heard so many complaining CVT (any CVT, not just Proton/Mitsu/Honda etc. etc.) is inefficient la, pickup slow la, sucks power la, sucks fuel la. It is really starting to get tiring. You cannot drive a CVT like a normal AT car and expect the same characteristics.

If you want to buy a CVT car, invest some time in learning how to drive one for the best results, instead of stomping on the gas pedal and shouting "WHY WON'T YOU GO??!!!"

One thing is true though, CVT is more fragile than regular slushboxes and overheats relatively easily. If you intend to buy a car to touge every weekend, look somewhere else.

This post has been edited by dares: Aug 14 2014, 05:02 PM
briantft
post Aug 14 2014, 06:57 PM

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QUOTE(dares @ Aug 14 2014, 06:00 PM)
Proton's Punch CVT ie the ones in Saga/Preve uses a wet clutch, whereas those in Sylphy/Altis uses torque converter. So it stands to reason that a clutch-based transmission will definitely be less smooth and jerks more than that of a torque converter, especially during low speed. It has less to do with Campro being refined or not.

The reasoning behind using a wet clutch is for efficiency, as for how efficient it is....well it seems different people has different results.

I have heard so many complaining CVT (any CVT, not just Proton/Mitsu/Honda etc. etc.) is inefficient la, pickup slow la, sucks power la, sucks fuel la. It is really starting to get tiring. You cannot drive a CVT like a normal AT car and expect the same characteristics.

If you want to buy a CVT car, invest some time in learning how to drive one for the best results, instead of stomping on the gas pedal and shouting "WHY WON'T YOU GO??!!!"

One thing is true though, CVT is more fragile than regular slushboxes and overheats relatively easily. If you intend to buy a car to touge every weekend, look somewhere else.
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Great, thanks for the info bro. I can't tell the different in terms of mechanical set up of torque converter or wet clutch but if compare between Altis and saga, saga's cvt is really jerky and inefficient. I almost thought saga is using normal 4-speed AT instead of cvt. For the complaints regarding CVT, may be due to manufacturer's defect, may be due to the driver's bios perception and expectation or even, they though CVT is like AT, should have the push/gear changing feel and sound and so on. Even me, when i just got my Prius, i even called back to service center ask if the transmission was something wrong caz i can't hear or feel any gear changing. It takes time to get familiar with cvt caz it is really different than AT.
Icetea87
post Aug 14 2014, 09:52 PM

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be it a torque converter based or wet clutch based, a car has to respond to its user needs and also the driver feel when driving. if other company can deal with torque converter, why proton stick with wet clutch? isn't it torque converter easier to fix and give better respond to the driver esp in the klang valley where traffic jam is normal and low speed travelling is almost unavoidable?

not to be rude, but when i pay money. i expect the car to drive well be it at or cvt or manual. jerkiness in the morning and low speed is not something that we should experience esp for a new car.

for now, the cheapest car in the market with cvt will be the saga , and i believe a lot of ppl buy the cvt saga for the daily usage. if we want people to adapt to new tech, we must introduce the advantages and convenience of the tech. if not , we will forever stuck with the 4at like what perodua and toyota do.

This post has been edited by Icetea87: Aug 14 2014, 10:03 PM

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