[Ovmsdev] Ampera Range

[Michael Jochum]

Hi,

ups.

missed the second/urgent part:

 case 0x2487:  //Distance Traveled on Battery Energy This Drive Cycle
          edrive_distance = KM2MI((can_databuffer[5] + ((unsigned int)can_databuffer[4] << 8)) / 100); // German Volt Report im KM
          if ((edrive_distance > va_drive_distance_bat_max) && (car_chargestate == 4)) va_drive_distance_bat_max = edrive_distance;
        break;

:)

Both in vehicle_voltampera.c

Bye
Michael


Am 22.01.2014 um 21:49 schrieb Michael Jochum <mikeljo at me.com>:

> Hi,
> 
> i use this code:
> 
> case 0x8334:  // SOC
>         car_stale_temps = 60;
>         car_SOC = (char)(((int)value * 39) / 99);
>         car_idealrange = ((unsigned int)car_SOC * (unsigned int)va_drive_distance_bat_max) / 100;
>         car_estrange = car_idealrange;                              // Very kludgy, but ok ...
>         break;
> 
> It works well.
> The only Problem is that it saves only the highest range an don't go down.
> 
> Bye
> Michael
> 
> Am 22.01.2014 um 17:55 schrieb Tom Saxton <tom at idleloop.com>:
> 
>> "Ideal Range" as used by the Roadster doesn't mean "under ideal conditions". Under ideal conditions, the Roadster can go 347 miles.
>> 
>> Ideal range is defined by the EPA rating of the car's range, 244 miles, multiplied by current pack energy estimate divided by nominal pack capacity. The Volt's EPA rated electric range is 35 miles, although you could scale that up to 40 miles to account for the change in EPA testing since the Roadster number was set.
>> 
>>    Tom
>> 
>> From: Denis KRAUTH <denis.krauth at gmail.com>
>> Reply-To: OVMS Developers <ovmsdev at lists.teslaclub.hk>
>> Date: Tuesday, January 21, 2014 at 10:28 PM
>> To: OVMS Developers <ovmsdev at lists.teslaclub.hk>
>> Subject: Re: [Ovmsdev] Ampera Range
>> 
>> Hi,
>>  
>> Yes, I agree. If we can not read the actual range estimation of the car from the bus, then we should use 50 miles (80 km) as ideal range.
>> Estimated range could be something below that, using a multiplyer.
>>  
>> What we could do to get a better estimate, is to use the temperature, as we have the value from the car.
>> It should require a little testing, but we could find out a relation between temperature (both ext. and battery temp.) and the range.
>>  
>> Denis.
>>  
>> De : ovmsdev-bounces at lists.teslaclub.hk [mailto:ovmsdev-bounces at lists.teslaclub.hk] De la part de Paul Churchley
>> Envoyé : mercredi 22 janvier 2014 02:36
>> À : OVMS Developers
>> Objet : Re: [Ovmsdev] Ampera Range
>>  
>> 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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