Apr 18 2012, 09:36 AM
QUOTE(mat79 @ Apr 18 2012, 08:36 AM)
gudmorning everyone. Did some questioning on sluggish things to my friends, so, technically, even me pening, but try to lay out as simple as i understand.
Whats so much diff in cfe exora n preve throttle response?
Exora bold throttle is sharpen a bit as to counter its weight. While preve being lighter, throttle in d mode is not as sharper as in exora.
This sluggish feeling associate with dbw n cvt clutch based. If torque converter based cvt, normal auto, its not that apparent, but still have lag.
From stagnant, in d mode, is like throttle input ratio changes from 50:50 to 70:30 before its start to become better. It is due to emmision control n safety reason. Its like this. If throttle given out 100% input, its like driving manual car without dbw throttle, rev up to for example 2k rpm where the turbine already spin, lift of clucth, the car will instant lurk forward n n cause wheel spinning or a bit torque steer which is dangerous coz dbw if in full throttle, is very instance. N to control amount of harmful gas emit immediately, so that can reach euro step.
So, its even from stagnant rev up to 2k, turbo still not spooling yet cause throttle still not 100%, until start moving then gradually the throttle change to max ratio, turbine will spooling.
While in S mode, throttle being sharper about 20% from d mode n also rpm also raised 20% from normal d mode, so, u have better throttle response than d mode during stagnant.
Being tuned to be more linear, he used the word refine, the surge is not as strong as bold cfe, but its actually the same.
If used torque converter based, still has lag but then its better, but during moving, pwrloss is higher than clutch based. Same as dsg. Only from standstill to move only. It just a blink of a second. More common term is call throttle lag.
So, he advised, try to go for a second spin. If want to immitate a normal sedate citu driving, rev up a bit like 2k rpm, when the car is already on the move, then ease off a bit the throttle to avoid 2k rpm to have better fc relying on cvvt.
Even when want to take out for sprint, rev up, still feeling slow when start coz of the above mentioned but when it catch up speed, throttle in full,then its ok, when u rev example 3.5k rpm from stagnant, when moving then continue to pressing pedal to reach 4k rpm.
So, i dunno whether my layman explanation is understandable coz cant explain in tech things coz me oso pening :-).
But coz me so used to all prtns using dbw whether from prtn or renault previously, so, dont have any probs.
Maybe everyone shud take a second spin.
Honda Insight also comes with clutch based cvt, and the ample torque (also around 200nm in total engine +electric motor) when motor kicks in.Whats so much diff in cfe exora n preve throttle response?
Exora bold throttle is sharpen a bit as to counter its weight. While preve being lighter, throttle in d mode is not as sharper as in exora.
This sluggish feeling associate with dbw n cvt clutch based. If torque converter based cvt, normal auto, its not that apparent, but still have lag.
From stagnant, in d mode, is like throttle input ratio changes from 50:50 to 70:30 before its start to become better. It is due to emmision control n safety reason. Its like this. If throttle given out 100% input, its like driving manual car without dbw throttle, rev up to for example 2k rpm where the turbine already spin, lift of clucth, the car will instant lurk forward n n cause wheel spinning or a bit torque steer which is dangerous coz dbw if in full throttle, is very instance. N to control amount of harmful gas emit immediately, so that can reach euro step.
So, its even from stagnant rev up to 2k, turbo still not spooling yet cause throttle still not 100%, until start moving then gradually the throttle change to max ratio, turbine will spooling.
While in S mode, throttle being sharper about 20% from d mode n also rpm also raised 20% from normal d mode, so, u have better throttle response than d mode during stagnant.
Being tuned to be more linear, he used the word refine, the surge is not as strong as bold cfe, but its actually the same.
If used torque converter based, still has lag but then its better, but during moving, pwrloss is higher than clutch based. Same as dsg. Only from standstill to move only. It just a blink of a second. More common term is call throttle lag.
So, he advised, try to go for a second spin. If want to immitate a normal sedate citu driving, rev up a bit like 2k rpm, when the car is already on the move, then ease off a bit the throttle to avoid 2k rpm to have better fc relying on cvvt.
Even when want to take out for sprint, rev up, still feeling slow when start coz of the above mentioned but when it catch up speed, throttle in full,then its ok, when u rev example 3.5k rpm from stagnant, when moving then continue to pressing pedal to reach 4k rpm.
So, i dunno whether my layman explanation is understandable coz cant explain in tech things coz me oso pening :-).
But coz me so used to all prtns using dbw whether from prtn or renault previously, so, dont have any probs.
Maybe everyone shud take a second spin.
I can digest what you're trying to say. The hydraulic pressure controlling the cvt clutch varies upon few input, including distance off throttle, rate of throttling, etc.
The Insight somehow using electric boost for torque, the fine tuning by computers done electronically, so its easier, controlling the current for electric motor output, results smoother delivery. Too safe actually. Somehow we still notice jerks when battery charging-discharging, normal for all hybrids, not at all bothering.
While Preve, torque is boosted by turbo, should be harder to fine tune and/or control. Plus the clutching for cvt gearbox, the car can be too safe (hesitant to unleash the power) or too abrupt. Personally i feel Proton did a good job to balance the power delivery.
That few miliseconds lag should be more than acceptable, unless the owner WOT everytime. No driver would do that under normal circumstances. Good job proton.
*WOT = wide open throttle. no to be mistaken for 'woman on top'
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