[Ovmsdev] Twizy45 testing needed

Tue Feb 4 23:31:05 HKT 2014

I think you missed saying 'allegedly' or 'hypothetically' in the below post. As in 'allegedly doing 50kph' or 'hypothetically 60kph' ;-)

Regards, Mark

> On 4 Feb, 2014, at 4:17 pm, "Julien (JaXX) Banchet" <jaxx at jaxx.org> wrote:
> 
> 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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>> 
> 
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