[Ovmsdev] Ampera Range

[Paul Churchley]

Yes Mark, I agree. I am very surprised at such a low figure myself. I could
imagine 35 miles, rather than kms, as a typical range which I often get in
winter but in summer I always get 40-45 miles and have had 50 miles on a
few occasions.

I like the idea of using features and they are easy to set and change.

Regards, Paul


On 22 January 2014 01:43, Mark Webb-Johnson <mark at webb-johnson.net> wrote:

> Paul,
>
> Wow. 50 miles ideal vs 35km in the code is quite a difference. I wonder
> why the code is so conservative?
>
> The current logic is, indeed, to use SOC% to calculate the ideal and
> estimated ranges.
>
> Setting defaults for ideal to X and estimated to Y, per 100% SOC, seems
> sensible. It is possible to use 'features' to store these - those are 8bit
> integers and there are a few available for such uses.
>
> Regards, Mark.
>
> On 22 Jan, 2014, at 9:36 am, Paul Churchley <paul at churchley.org> wrote:
>
> In my experience the range from 100% in ideal conditions rarely exceeds 50
> miles. It does occasionally and many have done well over that but for the
> vast majority, for the vast majority of the time, an ideal conditions range
> is 50 miles.
>
> We have the SOC% so can we not simply use that to adjust the ideal range?
>
> My normal range varies from about 45 miles to about 30 miles depending on
> temp, speed etc so can we just adjust the ideal range by say, 4/5 to give
> typical range?
>
> I realise that these are not scientific ways to estimate range but perhaps
> that is about as good as we can expect for now? We can adjust these
> multipliers once we have had a chance to test it out.
>
> Could we use parameters to set a personal 100% ideal range and 100%
> typical range? The module could then provide a personal range based on our
> personal parameters and as we get better (or worse!) as EV driving so we
> could then adjust our personal preferences and tune our own personal range.
>
>
>
> On 22 January 2014 01:24, Mark Webb-Johnson <mark at webb-johnson.net> wrote:
>
>>
>> Seems to be a hard-coded constant:
>>
>> va_drive_distance_bat_max = MiFromKm(35);    // initial Battery distance
>> in km
>>
>>
>> I think we could be a bit 'smarter' with this - particularly given the
>> 'ideal' and 'estimated' range indicators we have.
>>
>> Any ideas?
>>
>> Regards, Mark.
>>
>> On 22 Jan, 2014, at 12:17 am, Steve Gadd <ste_gadd at hotmail.com> wrote:
>>
>> That's odd because i've just noticed that in the past few days - the
>> range now being displayed on my Volt, which used to be as you described, is
>> now quite acurate?
>>
>> Steve.
>>
>>
>>
>> ------------------------------
>> Date: Sat, 18 Jan 2014 08:58:56 +0000
>> From: paul at churchley.org
>> To: ovmsdev at lists.teslaclub.hk
>> Subject: [Ovmsdev] Ampera Range
>>
>> Just a bit of feedback regarding the range displayed on the phone app for
>> the Ampera.
>>
>> A full charge currently displays a range of about 22 miles. This is
>> probably a bit over half the real range and well below the estimated range
>> on the car dash.
>>
>>
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