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 Proton Prevé V7, ► Official Discussions for Proton Prevé

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dares
post May 12 2012, 08:32 PM

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QUOTE(tkaira @ May 12 2012, 08:26 PM)
hmm.gif from wikipidea.. anyway can anyone confirm this? mat79 perhaps?  tongue.gif ..its good to know types of tech used in cars

cvvt:

Continuous variable valve timing offers a unique ability to have independent control of the intake and exhaust valves in an internal combustion engine. For any engine load criteria, the timing of intake and exhaust can be independently programmed.

vvti:

VVT-i, introduced in 1996, varies the timing of the intake valves by adjusting the relationship between the camshaft drive (belt, scissor-gear or chain) and intake camshaft. Engine oil pressure is applied to an actuator to adjust the camshaft position. Adjustments in the overlap time between the exhaust valve closing and intake valve opening result in improved engine efficiency.

dvvt: (not to be confused with peroduas dvvt which stands for dynamic vvt .its only a normal vvt)

The Dual VVT-i system adjusts timing on both intake and exhaust camshafts. It was first introduced in 1998 on the RS200 Altezza's 3S-GE engine.

Dual VVT-i is also found in Toyota's new generation V6 engine, the 3.5-liter 2GR-FE first appearing on the 2005 Avalon. This engine can now be found on numerous Toyota and Lexus models. By adjusting the valve timing, engine start and stop occurs almost unnoticeably at minimum compression. Fast heating of the catalytic converter to its light-off temperature is possible, thereby reducing hydrocarbon emissions considerably.
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Haha, you were like me not so long ago, quoting the same stuffs.

Anyway, any VVT has the ability to continuously adjust the timing of the valves according to RPM. The Campro CFE can only variate the intake valve while others like the Dual VVT can variate both the intake and exhaust valve. These CVVT, VVT-i, DVVT, Dual VVT-i are all basically the same thing by different companies.
dares
post May 12 2012, 08:36 PM

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QUOTE(maverickng @ May 12 2012, 08:33 PM)
actually i dont expect for fast to get car d,i also dunno why so fast will get sweat.gif maybe i am lucky (i am not tan sri son pls mad.gif )
will told bro to take some pic and upload later rclxms.gif
i booked at ipoh 3s showroom...where my bro gf work...maybe less ppl booking at there gua
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You are Tan Sri. tongue.gif
dares
post May 12 2012, 08:38 PM

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QUOTE(tkaira @ May 12 2012, 08:34 PM)
LOL  laugh.gif same stuffs  sweat.gif ... anyways thnks  icon_rolleyes.gif

edit: i only joined this thread at v4  tongue.gif
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hehe, I should add though, even though these systems achieve the same thing, they may employ different methodology. This is beyond my limited knowledge, though. tongue.gif
dares
post May 12 2012, 10:07 PM

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QUOTE(deepan84 @ May 12 2012, 09:59 PM)
the blue looks different in every pic. haha. some looks dark blue, while some looks green.
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Ini keluar dari instagram kot hmm.gif
dares
post May 12 2012, 11:10 PM

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QUOTE(adrianwtx90 @ May 12 2012, 11:04 PM)
today wanted to test drive a proton. and a kia. this shop has both but the cars are not test drive unit. they give me customer car to drive. i feel so dissapointed. i willl not buy from them. its the one at seapark =.=.

summur dare tell me. cannot "test drive" far. no insurance.
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This shop sells Potong and Kia? blink.gif
dares
post May 12 2012, 11:50 PM

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QUOTE(Rick Federer @ May 12 2012, 11:42 PM)
preve don't have Hill Assist aka ECT??

Then who has tried stopping at a slope and release brake?
How much does the car roll backwards?
Easy to control the foot pressure on the accelerator pedal?
Hill descending using D mode has sufficient engine drag to slow the speed?
Or will it stays at a high gear while descending in D mode?

This is worrying me. I thought Proton says this car got features of cars above 100k but where is the hill assist button??  rclxub.gif
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For CVT, I believe there is a hill-hold feature but it is built into the CVT TCU, no button whatsoever.

That said, the car will roll backwards when you release the brake up a slope, because the clutch needs time to close. I dunno how far because I will usually press the accelerator very soon.

Engine braking during hill-descend is pretty strong, though, even in D mode.
dares
post May 13 2012, 12:03 AM

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QUOTE(FrostLance @ May 13 2012, 12:00 AM)
its different from conventional CVT also le. clutch disgengange thing doesnt happen in teana/lancer if not mistaken.
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They both use torque converter CVTs, I believe.

The Punch Powertrain CVT uses wet clutch.


QUOTE(Rick Federer @ May 13 2012, 12:02 AM)
Ahhhhh.  nod.gif
Thanks for enlightening me. I am used to my altis. I never like to heat up my brakes when descending.
I guess by pushing down to S mode will add another 1000 rpm to drag much more. Right? hmm.gif
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Yep. S will result in stronger engine braking. I am, of course, speaking from experience from using the CVT from my Saga which is also from Punch Powertrain, but different model (Saga is VT2, Preve is VT3).

This post has been edited by dares: May 13 2012, 12:05 AM
dares
post May 13 2012, 01:17 AM

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QUOTE(V12Kompressor @ May 13 2012, 01:12 AM)
both sama saja

VT3 is based on VT2 with stronger and bigger parts.

VT2 is an "evolution" of VT1 which was previously developed by ZF for Mini and Rover, etc.
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Whats the relationship between Punch and ZF?
dares
post May 13 2012, 01:25 AM

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QUOTE(V12Kompressor @ May 13 2012, 01:23 AM)
no relation at all.

ZF wants to concentrate on making conventional automatics and keep on pushing the cog war in automatic transmission because automatics are more popular in Europe, so ZF sell off all its research and patents in CVT to PUNCH. Punch further develop the ZF CVT and the result is VT2, VT3 and VT4. Just good business.
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OOooo OK notworthy.gif


dares
post May 13 2012, 11:30 AM

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QUOTE(adrianwtx90 @ May 13 2012, 10:20 AM)
i think preve got alot potential for mods. since its a turbo with low pressure. we can tweak the presure make higher
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If you wanna mod your preve, wait for the manual CFE variant or buy the IAFM manual variant. The CVT gearbox is already near its operational tolerance limit with the CFE.
dares
post May 13 2012, 11:52 AM

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Car is launched for less than a month, already got people hunting for fc figures sleep.gif

Even if there are any, it wont reflect the long term fc since the engine is so new.

This post has been edited by dares: May 13 2012, 11:53 AM
dares
post May 13 2012, 12:18 PM

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Time for v8 dy.

Where is whitelighter, dhuang dhuang or fenomX?
dares
post May 13 2012, 03:23 PM

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QUOTE(adrianwtx90 @ May 13 2012, 02:51 PM)
As far as I know from what the SA tell me. that part will be replaced/fixed. before sending out already as they are already aware of the issue. so i think you need to just wait for 1000 KM service to get it fixed.

i didnt ask about those that are already driving. but i think your SC should know about this as well. since my SA also know. sure the center would know.


Added on May 13, 2012, 2:56 pm

my SA just tell me one very technical part name. valve or something. i dont recall also what is it. lol
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The OWV issit, that one is engine wor, not CVT.

This post has been edited by dares: May 13 2012, 03:29 PM
dares
post May 13 2012, 03:47 PM

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QUOTE(vignesz @ May 13 2012, 03:32 PM)
Shall i create an event for our TT already? 26th May, PREVOC TT @ Al-Barkath - 1.30pm. I really feel we should meet up soon since the numbers are growing rapidly and it would be a perfect opportunity for all members to come together.
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I am good with the time and venue.
dares
post May 13 2012, 04:00 PM

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26th or 27th I also can. 26th cant be too late though.
dares
post May 13 2012, 05:36 PM

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QUOTE(falkenst115 @ May 13 2012, 04:43 PM)
OCV, oil control valve *perhaps? unsure.gif
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Thanks for correcting smile.gif

I remember it had something to do with the VVT system in the engine.

This post has been edited by dares: May 13 2012, 05:37 PM
dares
post May 13 2012, 06:39 PM

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QUOTE(earthdome @ May 13 2012, 05:41 PM)
i guess since there's now more and more reckless driver on the road, people are now more concern about the safety biggrin.gif hence the premium
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People concerned about reckless drivers driving a proton turbo car haha tongue.gif
dares
post May 13 2012, 09:26 PM

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Samething happened to me once (Saga CVT). Drove back home at nite, reverse into parking, stalled.

What I'd usually do if the car starts to jerk/vibrate while reversing, I'll lift off the accelerator and stop with the brakes, let the engine "catch it's breath", so to speak, then continue reversing. Not sure if it is universally applicable to every incident, though.

It's been talked about at the Saga thread, it does seem that the CVT's reverse gear is a bit finicky.

This post has been edited by dares: May 13 2012, 09:26 PM
dares
post May 13 2012, 10:42 PM

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QUOTE(rich8833 @ May 13 2012, 10:31 PM)
Preve no L2 only S wor.. if anyone do go, please let us know how is the drive up to visit uncle lim?
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Coz CVT no fixed gear ratios, hence tader 3-2-L. Should be no problem going genting in D.

This post has been edited by dares: May 13 2012, 10:42 PM
dares
post May 13 2012, 10:48 PM

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QUOTE(kiapreve @ May 13 2012, 10:45 PM)
Hmm....anyone interest to plan TT at Genting after 1st 1000 service? we can drop by the Bukit Tinggi R&R (Petronas) there to have a photo shooting..
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It's gonna become 2 convoys.

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