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Torque » Torque OBD ECU Scanner » Torque Discussion / Ideas » Questions from a new user

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Author Topic: Questions from a new user
Nosmoke
Member
Posts: 10
Post Questions from a new user
on: July 19, 2018 (GMT)

Could someone please point me to a description of how Torque calculates fuel mileage. I started with the assumption that it would use the fuel flow rate PID and combine that with vehicle speed from either the vehicle speed PID or the GPS speed. Then, I read some docs that suggested the fuel flow rate is calculated from the engine displacement, volumetric efficiency etc (which seems not a very accurate way of doing it).

Also, I tried to do a PID scan from Torque Scan. It tells me there is a “Permissions problem”. which “…requires full application permissions to be able to send specific data to the OBD adaptor. Please enable full permissions in Torque’s plugin settings”. I have enabled all permissions in Android Settings for Torque and Torque Scan shows “No permissions requested”. What else is necessary to get it to work??

Thanks for any help….
Capp777
Member
Posts: 2993
Post Re: Questions from a new user
on: July 19, 2018 (GMT)

I believe there is a setting within Torque itself
that is being requested.

Menu>Settings>Plugins

The formulas used internally by Ian are most
likely not public.

Torque also has a totalizer function which can
be used as well if your vehicle reports the
required sensors in the correct units…

Example:

tot(3600:[0d])/tot(3600:[5e])

Nosmoke
Member
Posts: 10
Post Re: Questions from a new user
on: July 19, 2018 (GMT)

OK, thanks – got the PID scan working.

Any docs anywhere on how to implement the totalizer function? I’ve looked around and can’t find anything.
Capp777
Member
Posts: 2993
Post Re: Questions from a new user
on: July 19, 2018 (GMT)

You would need to create a custom pid
with the equation given…

Long Name: Totalizer
Short Name: Totalizer
Mode/PID: leave blank
Header: leave blank
Equation: tot(3600:[0d])/tot(3600:[5e])
Min: 0.0
Max: 100.0
Scale: x1
Units: km/L
Start/Stop Diagnostic Commands: leave blank

Assuming [0d] returns km/h and [5e] returns
L/h.

After adding display to your dashboard using
its unique long name, reset by long pressing
the display and pressing the reset option.

Note:

0/0 will return NAN until totalizers increase.

https://torque-bhp.com/wiki/Equations

Nosmoke
Member
Posts: 10
Post Re: Questions from a new user
on: July 19, 2018 (GMT)

Merci buckets Capp777 – I will try it.

Oh, and thanks for the link to the docs!

Update: [5e] returns = 0 so I guess that won’t work. :(

Vehicle is 02 Golf TDI (diesel)

Mileage is apparently then calculated by some indirect method(?). This is disappointing as the available VW specific interface VAGCOM does access that data (in l/Hr) and I have been unable to find PIDs for VW products.
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