Programmable On/Off Outputs- FuelCons

[sedd]

Is the FuelCons listed as an Output Channel in Programmable On/Off Outputs the same as Fuel Consumption shown in the MegaLog Viewer? MegaLog viewer shows this as gallons per hour (GPH). Can I assume the values in programmable settings are also GPH?

[sedd]

I never did get a response on this one.

I set the sampling rate for the CC/MIN fuelflow at 100 milliseconds (ms) using special options screen under Can-bus testmodes drop down. I used portp megalog data to tell when the output was active. I used the output port named fuelflow on the programmable output selection.

Using the megalog viewer it appears the fuelflow selection I used triggers this programmable output with close response to the fuel flows and pulse width.

[jsmcortina]

I never did get a response on this one.

Did you check the manual?

The available realtime data and logged fields are listing in the Datalogging section of the TunerStudio Reference Manual.

James

[sedd]

I have Megasquirt3_TunerStudio_MS_Lite_Reference-1.4. I looked in that, and will look again.

I am using the full version of tuner studio. Is there another full version manual I need to get?

[slow_hemi6]

From here? http://www.msextra.com/doc/pdf/html/Meg ... .4-50.html
Fuelcons is not listed, as such.

[sedd]

OK, I must be missing something? Could you note the page number that shows the info?

I looked again and only see Fuel flow cc/min listed in the manual I have and you have posted. Page 53 of 335 in the manual I have.

My Megalog shows data for Fuel flow cc/min, and also Fuel Consumption plus Fuel Flow. So there are 3 fuel flows in MegaLog and all provide data.

[slow_hemi6]

Yeah I don't know. I can't see Fuelcons either. So unless it already knows whether you are l/100 or MpgUS or MpgUK from Gauge Setting and Limits tab. But those are not output channels.

[slow_hemi6]

My Megalog shows data for Fuel flow cc/min, and also Fuel Consumption plus Fuel Flow. So there are 3 fuel flows in MegaLog and all provide data.

All of those would be calculated from your injector data, PW and time. For traditional fuel consumption l/100km or MPG you need a speed input. Thats still not really helping you out with what the fuelcons output channels value is. Might have a look in the ini file.

[slow_hemi6]

Code: Select all

fuelflow         = scalar, U16,  220, "cc/min",   1, 0.0 
fuelcons         = scalar, U16,  222, "l/km",   1, 0.0

Looks like it is native l/km

Code: Select all

; calculate instantaneous economy from fuel flow (not calculated in firmware at this time)
    economy_l_km = { vss1_ms_1 ? (fuelflow / (vss1_ms_1 * 60)) : 0 }
;    economy_mpg_us  = { (1 / economy_l_km) * 3.800 / 1.609344 }
    economy_mpg_us  = { vss1_ms_1 ? (2.361 / economy_l_km) : 0 }
    economy_mpg_uk  = { vss1_ms_1 ? (2.825 / economy_l_km) : 0 }
    economy_l_100km = { economy_l_km * 100 }

[sedd]

I have not had time to learn how to read the code. You guys are impressive to do all of this! Is this code in the section on the programmable outputs?

If I understand what you have shown, It looks like fuelflow is the one to use.

As you have noted the other fuelcons is based on speed and not what I want.

many thanks.

[slow_hemi6]

That is taken from the ms3 ini file. It is the file that configures tuner studio to work with a MS3. That first part is taken from the Output Channels section. The part in inverted comas is what the value is.
The second part is further in the ini but shows how the l/100, MpgUS and MpgUK are derived. They are translations. You can see that without a vss those do not work.

[jsmcortina]

The TunerStudio Reference manual (written by me) in the main covers the settings and features related to the firmware. In addition TunerStudio provides other internal calculated fields, but I don't know much about them so they aren't documented. Likewise the "upgrade" features aren't documented. I'm not sure if there are plans from the authors to provide any additional documentation.

James