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 ♠ ♠ ♠Proton Prevé V4♠ ♠ ♠, ► Official Discussions for Proton Prevé

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FaezFarhan
post Apr 19 2012, 12:43 AM

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QUOTE(JC999 @ Apr 19 2012, 12:30 AM)
i read the wielding part is really bad, looks as if the car is like kereta potong.. anyone care to confirm?
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Not the CAR laaaa, the DOOR.
V12Kompressor
post Apr 19 2012, 01:42 AM

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QUOTE(FaezFarhan @ Apr 19 2012, 12:43 AM)
Not the CAR laaaa, the DOOR.
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biasalah, over reacting over small matter. -.-
Saya_Dhuang
post Apr 19 2012, 01:44 AM

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Hi there guys.. Kindly add me to the buyer's list too.

CFE
Solid White
Booking Date: 14/03/2012

Got a very nice info here, thanks to u guys!
mat79
post Apr 19 2012, 02:14 AM

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erm, if not mistaken, prtn already used one piece door stamping gen2, tailor welded blanks door saga,exora, and preve i think, door sash + doorpanel, using double spot, robotic plasma welding.

I thinkla :-), dengor2 khabar anginla, ingress corp supply the door to prtn preve. So, better ask them lah, ha...ha...

The door sash is made using roll forming method, only using this method, u can used advance high strength steel(ahss) aka ultra high tensile steel(uhss) as the material coz in cold forming method, its really hard to shape ahss to complex shape coz of its rigidity.

Then the door structure is normally used high strength steel low alloy(hsla), and the trapezoidal impact beam, unique to proton n lotus, start in satria neo n upward(not tabular impact beam as some others using) inside the door also ahss using roll forming.

So, combining the door sash n door panel is using robotic(not human, unless humanoid :-)) plasma welding, double spot, for strength n better corrosion resistant. Ops, forget to mentioned, all high strength steel using in car are galvanised steel(corrosion resistant coating steel). Plus, its now painted in white(thats why they called it body in white as the preve chasis during power of one event), then another layers of colors paint.

So, in other words, using this method, the door will enhance its strength by combining two type of steels(ahss for door sash n hsla for door structure), n door sash is stronger than before as in using tailor welded blanks. Coz previously, only being protected by ahss impact beam inside the door, but door sash still not as strong as ahss(trip or dp), but now, the whole door has the same strength. Yup, i think better they (prtn)conceal with rubber next time, so that people will not do their own professional analysis.

Malas betul nk taip panjang2 dlm hp, dont ask me again about this coz juz copy the word from some fella fren :-). Further info, maybe u can contact the above mentioned kot :-).

130kmh, pull to S mode, possible of course, the impossible for .....to catch u.

Cvt, ask kristof ler. Or maybe u just visit autoworld to understand better, wet clutch cvt. The suggestion method, to overcome throttle lag from dbw, put in s mode, to overcome torque retention by cvt,before century sprint, when u waiting at junction, dont used footbrake(meaning car already stop, but its normal u still pressing the brake especially at steep road), used handbrake instead, ur right foot already at the gas pedal,
when everything clear, then lift the handbrake and press the pedal :-).

Wah, mcm pemberita sukan plak. If want to know why this n there in wet clutch cvt, n how it is differ from torque converter or dry clutch cvt, then refer to kristof, he's the expert. Me just a layman explanation, already explain about clutch, many didnt understand, then refer to him, he can answer u, deeply.

Sorry fenomx, my children are sick, so, bz taking care of them after work.

Aahhh., children just sleeping. Me, already tired . Salam.
TSFenomX
post Apr 19 2012, 02:23 AM

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QUOTE(mat79 @ Apr 19 2012, 02:14 AM)


130kmh, pull to S mode, possible of course, the impossible for .....to catch u.



Sorry fenomx, my children are sick, so, bz taking care of them after work.

Aahhh., children just sleeping. Me, already tired . Salam.
*
Jangan sorry sorry, thank you so much for your explanation ;D
means i'm going to play with this, it wont spoil the gearbox right if i'm at highway driving very fast then get bored, pull to S mode directly and play with the blood rush ;D

Harap harap your children will recover soon. Salam ya!
Nightstalker1993
post Apr 19 2012, 02:31 AM

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QUOTE(ckk125 @ Apr 18 2012, 09:48 PM)
this is on a RM132K car, can almost buy 2 preve already...

user posted image
this is on a toyota altis.
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see what i mean. cakap pasal toyota bad qc, nobody talks about it doh.gif
dares
post Apr 19 2012, 02:41 AM

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Just in case there are any confusion why use the handbrake as opposed to the footbrake, as recommended by mat79, that is because the wet clutch opens (disengages the cvt from the engine) when...

1. The gear is in N or P
2. The brake pedal is pressed (my understanding is it will not be opened as wide as in condition 1, therefore still creating drag.)

So, from Kristof's explanation, my understanding is that, when you are pressing the brakes, and release it to press the gas pedal, the clutch needs time to close, hence the lag experienced. If you dont want to feel this throttle lag, you either...

1. Wait a moment before pressing the gas pedal, by when the clutch will be completely closed, or
2. use the handbrake to stop the car from moving, but keep you gear in D. This way the clutch never opens, and once you relase the handbrake the car is ready to go right away.

The torque converter cvt does not have this lag issue because it simply does not open nor close.

Mat79,pls correct me if I am mistaken.

This post has been edited by dares: Apr 19 2012, 02:53 AM
setsunagn0000
post Apr 19 2012, 02:42 AM

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QUOTE(Nightstalker1993 @ Apr 19 2012, 02:31 AM)
see what i mean. cakap pasal toyota bad qc, nobody talks about it doh.gif
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true.. when comes to proton everyone bash like no tomorrow but other car brands like toyota they give tones of excuses and say is a small matter instead mad.gif
Nightstalker1993
post Apr 19 2012, 02:53 AM

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QUOTE(dares @ Apr 19 2012, 02:41 AM)
Just in case there are any confusion why use the handbrake as opposed to the footbrake, as recommended by mat79, that is because the wet clutch opens (disengages the cvt from the engine) when...

1. The gear is in N or P
2. The brake pedal is pressed (my understanding is it will not be opened as wide as in condition 1, therefore still creating drag.)

So, from Kristof's explanation, my understanding is that, when you are pressing the brakes, and release it to press the gas pedal, the clutch needs time to close, hence the lag experienced. If you dont want to feel this throttle lag, you either...

1. Wait a moment before pressing the gas pedal, by when the clutch will be completely closed, or
2. use the handbrake to stop the car from moving, but keep you gear in D. This way the clutch never opens, and once you relase the handbrake the car is ready to go right away.

Mat79,pls correct me if I am mistaken.
*
QUOTE
I have several question regarding CVT for exora bold(CVT3) and saga flx (CVT2):

1) I notice that exora bold still roll back on even slight /gradual slope(not-too-steep slope). Normal auto gear vehicle only will roll back when the slope is too steep, if it is not steep enough, it's will lock at there. Is there anyway to make CVT lock it when reach slight/gradual slope? It is kinda dangerous esp for new driver.
You are correct. This is a know "issue", but is a design feature actually. Two things contribute to this:
First thing is what we call idle neutral, unlike all regular older AT's that have a constantly dragging torque converter or clutch, we open our clutch (a wet clutch, more pressure = more drag, even more pressure closes it) almost completely when you are pressing the brake and standing still. this way fuel is saved. If you release the brake a little time is needed to apply pressure to our clutch again. that is when you roll back a little, rollback only occurs on hills steeper than 10%.
secondly the engine cannot deliver a lot of power idling, when aircon is on, heavy car, on a hill, we can start closing the clutch in order not to roll back, but that will cause the engine to stall. When you apply trottle you will notice first the clutch opens a little bit so engine revs up, than we start closing the clutch, during revving up, you can encounter rollback.

What to do? use handbrake in stead of brake, this way we not shift to neutral (we only read regular brake signal not handbrake), use enough trottle, this way the engine produces engough power to close the clutch in one move.


http://forum.autoworld.com.my/index.php?sh...pic=103354&st=0

post #3
TSFenomX
post Apr 19 2012, 02:53 AM

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i feel like going to those thread to comment but i don't think so it is appropriate as i'm a thread started for preve some more, so i better stay mutual to avoid more unnecessary fights.

hey guys, wanna create a TT for Preve?
mat79
post Apr 19 2012, 02:53 AM

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QUOTE(dares @ Apr 19 2012, 02:41 AM)
Just in case there are any confusion why use the handbrake as opposed to the footbrake, as recommended by mat79, that is because the wet clutch opens (disengages the cvt from the engine) when...

1. The gear is in N or P
2. The brake pedal is pressed (my understanding is it will not be opened as wide as in condition 1, therefore still creating drag.)

So, from Kristof's explanation, my understanding is that, when you are pressing the brakes, and release it to press the gas pedal, the clutch needs time to close, hence the lag experienced. If you dont want to feel this throttle lag, you either...

1. Wait a moment before pressing the gas pedal, by when the clutch will be completely closed, or
2. use the handbrake to stop the car from moving, but keep you gear in D. This way the clutch never opens, and once you relase the handbrake the car is ready to go right away.

Mat79,pls correct me if I am mistaken.
*
yup, thumb up :-), only no 2 below, only use handbrake when car already stop(so no need to press the brake), dont stop the car using handbrake, nanti pusing2, bahaya ooo :-).
I know, typo. Just morning troll. Bubye, off now.
Nightstalker1993
post Apr 19 2012, 02:53 AM

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QUOTE(FenomX @ Apr 19 2012, 02:53 AM)
i feel like going to those thread to comment but i don't think so it is appropriate as i'm a thread started for preve some more, so i better stay mutual to avoid more unnecessary fights.

hey guys, wanna create a TT for Preve?
*
I no drive Preve, but i test-drive before. Boleh? tongue.gif laugh.gif
mat79
post Apr 19 2012, 02:54 AM

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QUOTE(dares @ Apr 19 2012, 02:41 AM)
Just in case there are any confusion why use the handbrake as opposed to the footbrake, as recommended by mat79, that is because the wet clutch opens (disengages the cvt from the engine) when...

1. The gear is in N or P
2. The brake pedal is pressed (my understanding is it will not be opened as wide as in condition 1, therefore still creating drag.)

So, from Kristof's explanation, my understanding is that, when you are pressing the brakes, and release it to press the gas pedal, the clutch needs time to close, hence the lag experienced. If you dont want to feel this throttle lag, you either...

1. Wait a moment before pressing the gas pedal, by when the clutch will be completely closed, or
2. use the handbrake to stop the car from moving, but keep you gear in D. This way the clutch never opens, and once you relase the handbrake the car is ready to go right away.

Mat79,pls correct me if I am mistaken.
*
yup, thumb up :-), only no 2 below, only use handbrake when car already stop(so no need to press the brake), dont stop the car using handbrake, nanti pusing2, bahaya ooo :-).
I know, typo. Just morning troll. Bubye, off now. Ops, tq fenomx.
TSFenomX
post Apr 19 2012, 02:55 AM

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QUOTE(Nightstalker1993 @ Apr 19 2012, 02:53 AM)
I no drive Preve, but i test-drive before. Boleh? tongue.gif laugh.gif
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lai lai no problem, we can have some TT about preve also, maybe brainwash you then you go buy straight away ;D
dares
post Apr 19 2012, 02:56 AM

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QUOTE(Nightstalker1993 @ Apr 19 2012, 02:53 AM)
So i got it right, right?

QUOTE(mat79 @ Apr 19 2012, 02:53 AM)
yup, thumb up :-), only no 2 below, only use handbrake when car already stop(so no need to press the brake), dont stop the car using handbrake, nanti pusing2, bahaya ooo :-).
I know, typo. Just morning troll. Bubye, off now.
*
Oh ya sori. Hehe, thanks for correcting.
Nightstalker1993
post Apr 19 2012, 02:57 AM

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QUOTE(FenomX @ Apr 19 2012, 02:55 AM)
lai lai no problem, we can have some TT about preve also, maybe brainwash you then you go buy straight away ;D
*
sorry bro, already spent more than 10k on my Waja in 6 months time in modifications. Don't think i'll change anytime soon tongue.gif laugh.gif


Added on April 19, 2012, 2:58 am
QUOTE(dares @ Apr 19 2012, 02:56 AM)
So i got it right, right?
Oh ya sori. Hehe, thanks for correcting.
*
you just missed the part where the CVT only detects input from the main brakes and not the handbrake. Thats why when you pull the handbrake, the clutch is still slightly engaged compared to when you press the brakes it is fully open smile.gif

This post has been edited by Nightstalker1993: Apr 19 2012, 02:58 AM
TSFenomX
post Apr 19 2012, 02:58 AM

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QUOTE(Nightstalker1993 @ Apr 19 2012, 02:57 AM)
sorry bro, already spent more than 10k on my Waja in 6 months time in modifications. Don't think i'll change anytime soon tongue.gif laugh.gif
*
wahhhh shocking.gif shocking.gif shocking.gif shocking.gif

come discuss make friends, it is about the communities ma, maybe can share share experience in automotive industries or driving experience and also learn something, i very noob in automotive industries one but now learning a lot from this thread.
Nightstalker1993
post Apr 19 2012, 02:59 AM

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QUOTE(FenomX @ Apr 19 2012, 02:58 AM)
wahhhh  shocking.gif  shocking.gif  shocking.gif  shocking.gif

come discuss make friends, it is about the communities ma, maybe can share share experience in automotive industries or driving experience and also learn something, i very noob in automotive industries one but now learning a lot from this thread.
*
Thanks to DSZ mat79 in the thread thumbup.gif
TSFenomX
post Apr 19 2012, 03:00 AM

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QUOTE(Nightstalker1993 @ Apr 19 2012, 02:59 AM)
Thanks to DSZ mat79 in the thread thumbup.gif
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he must join the TT, i think i should put an announcement in first thread asking suggestion for TT ;D
dares
post Apr 19 2012, 03:01 AM

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QUOTE(Nightstalker1993 @ Apr 19 2012, 02:57 AM)
sorry bro, already spent more than 10k on my Waja in 6 months time in modifications. Don't think i'll change anytime soon tongue.gif laugh.gif


Added on April 19, 2012, 2:58 am

you just missed the part where the CVT only detects input from the main brakes and not the handbrake. Thats why when you pull the handbrake, the clutch is still slightly engaged compared to when you press the brakes it is fully open smile.gif
*
Cool, thanks nod.gif

Correction to the first two points too, the clutch is fully opened when the footbrakes are applied.

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