[Ovmsdev] Twizy45 testing needed

Tue Feb 4 16:17:59 HKT 2014

Hi,

Sorry for the late extra report.

Well, it gave me time to try the setings with a bit more time.

I bet some had a concern about the effect of these settings on range. 
Well after a few days of adapting, I can say that it has very little 
effect on range, less than a 10% cutback depending on driving habits, 
though achieving better and needless to say "Safer" performances.

I'm mostly against vehicle modifications of such sort, that said, on a 
country to country basis, the 45kmh limitation on 50kmh limited roads is 
in the end a bit dangerous where people are aggressive to the least 
while driving (I've only had good surprises in most surrounding 
countries). Therefor, being able to reach 50kmh, or even a tad more to 
keep up with the flow, avoids being pushed (or bullied) too much. (I did 
try 60 (+2) on some 70kmh segments, but rarely ever went over 50 in 
general. The simple fact of having a bit extra watts in the wheel shows 
that the Twizy deserves respect, the bullying evaporates with it :-)

But this can be a subject of much debate.

So again, with all the subjectivity this post can have, I believe that 
Michael has done a tremendous job! Thanks !

Oh, be aware: despite the bitter cold and it's effect on the traction 
battery, I estimate I kept my previous average of 70km of range, and 
still have my usual 3 stars on the eco-meter, though it takes a sensibly 
softer foot on the pedal. But, these mods will drastically change the 
speed of variation of the range-meter. Extra power with extra recup 
makes the estimation less smooth, obviously :-)

All I need now is a "Low Service Battery" alert, idiots managed to turn 
just about everything on (mainly the warning lights) and killed the 
service battery the other night :-)

Hugs and drive Safe !

JaXX
( damn, despite being the coolest driver in town, I hope no cops are 
reading this, my name is on the car o_O )

Le 27/01/2014 12:44, Michael Balzer a écrit :
> The "knock" sound is due to the gear box being coupled a little bit 
> loosely. This knock can also be heard on rapid load changes.
>
> That's why the "start" ramp is normally so slow (3% on the T45, 4% on 
> the T80), SEVCON calls this parameter "oscillation damping for loose 
> gear boxes".
>
> So 100% instead is of course a radical change ;-), experiment with 
> this value (first RAMPS param) until it sounds ok.
>
> Range will be affected by "race modes", but you can also configure 
> "eco" modes as well. You can also gain a little bit range through 
> higher recuperation, if you carefully use the power plus. It's all in 
> your foot :-)
>
> Regards,
> Michael
>
>
> Am 27.01.2014 09:14, schrieb Julien (JaXX) Banchet:
>> :)
>>
>> Well, 11km run, with a few higher speed portions.
>> Achieves illegal speeds swiftly ! (I'll put it back to normal)
>>
>> RAMPS/SMOOTHING combo kicks, literally.
>>
>> Actually, when putting the power on, you can hear a "knock" sound, 
>> like if the motor made a x° rotation to sync in some position, but I 
>> could be wrong.
>>
>> At low speeds, pushing or releasing the accelerator is immediate 
>> followed by the expected behavior, making the car rock a bit.
>>
>> Range seems affected, no massively but there is a difference, of 
>> course, will have to see that over time, plus it was freezing.
>>
>> see ya soon !
>>
>>
>>
>> Le 27/01/2014 02:17, Mark Webb-Johnson a écrit :
>>> The flexibility in the tuning of this is making me very jealous!
>>>
>>> Mark.
>>>
>>> On 27 Jan, 2014, at 3:14 am, Julien (JaXX) Banchet <jaxx at jaxx.org> 
>>> wrote:
>>>
>>>> Sure will try tomorrow !
>>>>
>>>> Maybe something like this
>>>>
>>>> CFG RECUP 25 35
>>>> CFG TSMAP N 100 100 80 50
>>>> CFG TSMAP B 75 100 80 60
>>>>
>>>>> 39 will have a recup kick with breaks (urban situation anyways, 
>>>>> barely ever over that speed, unless I leave early enough :-) )
>>>> the sub 33kmh will have near matching values between neutral and 
>>>> breaking, a no surprise zone in other words
>>>>
>>>> Won’t be getting back much more juice in the end but well, it’s 
>>>> still that :)
>>>>
>>>> Will give a shoot to the RAMPS/SMOOTH combo as well,
>>>>
>>>> MfG,
>>>>
>>>> JaXX
>>>>
>>>>
>>>> ------------------------------------------------------
>>>> De: Michael Balzer dexter at expeedo.de
>>>> Répondre: Michael Balzer dexter at expeedo.de
>>>> Date: 26 janvier 2014 at 19:58:38
>>>> À: Julien (JaXX) Banchet jaxx at jaxx.org, ovmsdev at lists.teslaclub.hk 
>>>> ovmsdev at lists.teslaclub.hk
>>>> Sujet: Re: [Ovmsdev] Twizy45 testing needed
>>>>
>>>>> Hi Julien,
>>>>>
>>>>> thanks :-)
>>>>>
>>>>> Great to read everything works as designed :-)
>>>>>
>>>>> Supplementing the POWER command, you should also try
>>>>>
>>>>> RAMPS 100 100
>>>>> +
>>>>> SMOOTH 0
>>>>>
>>>>> -- this sets start and acceleration ramps to maximum speed and
>>>>> disables
>>>>> smoothing. This makes the Twizy much more responsive to the throttle
>>>>> and
>>>>> can make more difference than the 11% torque increase (120% will
>>>>> be cut
>>>>> down internally to 111%).
>>>>>
>>>>> For RECUP, take a look at docs/Twizy-Torque-Speed-Profiles.ods:
>>>>> you can
>>>>> shape the braking recuperation strength per speed. Try:
>>>>>
>>>>> TSMAP B 80 100 60 40
>>>>>
>>>>> -- this is from sheet 2 "Recup1" and will shift the braking recup
>>>>> max to
>>>>> ~39 kph. This works pretty well on the T80 with 40% braking recup
>>>>> level.
>>>>> Btw: the TSMAP speed points are at the same for the T45.
>>>>>
>>>>> Regards,
>>>>> Michael
>>>>>
>>>>>
>>>>> Am 26.01.2014 19:20, schrieb Julien (JaXX) Banchet:
>>>>>> Hi all,
>>>>>>
>>>>>> Hi Michael,
>>>>>>
>>>>>> Listen, first things first:
>>>>>> Wow, what a f*cki’n crazy great job you’ve done there !!!
>>>>>>
>>>>>> Now: well, works as expected on my Twizy45,
>>>>>> Tried these on a very short run:
>>>>>> POWER 120 115 110 (I believe I feel a slight difference, but not
>>>>> that obvious)
>>>>>> SPEED 60 75 (didn’t have any slope to go beyond, got up to 60 neat
>>>>> and fast, kind of surprising/scary at first)
>>>>>> RECUP 27 42
>>>>>>
>>>>>> Ok, Recup: 27 instead of the default 21 (on the T45) is sensible,
>>>>> at the limit of slowing down a bit to fast for the following cars
>>>>> without a brake light
>>>>>> 42 on brake is scary: you’re already at 27, once you barely touch
>>>>> the brake, 42% recuperation kicks in after half a second, so you
>>>>> get your expected friction-brake slowdown and boom, an extra
>>>>> slow down from recuperation… 42 is really too agressive, making
>>>>> an in between/modulated foot controlled slowdown nearly impossible…
>>>>>> Will try 25 35 (Delta of 10% instead of 15%)
>>>>>>
>>>>>> We’ll see…
>>>>>>
>>>>>> Again: w00t! in town the crazy parisians will be less tempted
>>>>> to push me over the road as long as I can keep up with their illegal
>>>>> speeds !
>>>>>> (note: This is to be done at your own risk, mostly legal)
>>>>>>
>>>>>>
>>>>>>
>>>>>> (sorry for the lack of mail quote, I deactivated the digest mode
>>>>> which is kind of a pita)
>>>>>> -- 
>>>>>> Julien (JaXX) Banchet
>>>>> -- 
>>>>> Michael Balzer * Paradestr. 8 * D-42107 Wuppertal
>>>>> Fon 0202 / 272 2201 * Handy 0176 / 206 989 26
>>>>>
>>>>>
>>>> -- 
>>>> Julien (JaXX) Banchet
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