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Old 03-04-2012, 12:51 PM
TDIwyse TDIwyse is offline
Officially Welcomed to the 'Fest
Location: Midwest
Join Date: Sep 2010
Posts: 429
Mein Auto: 4 diesels
Been playing around the BT. It's very powerful compared to the Torque app. Much more data.

Here's what I had it set to log on today's drive:

Coolant temperature
Exhaust Gas Recirculation duty cycle command
Actual boost pressure Actual rail pressure
Exhaust gas pressure before particle filter
Traveled distance with this oil
Average engine speed
Fuel temperature
Engine oil temperature communicated on Low CAN
Command time for main injection 1
Command time for pre-injection 1
Command time for pre-injection 2
Command time for post injection 1
Command time for post injection 2
Traveled distance since last regeneration (16bit)
Actual ash quantity
Soot mass in particle filter
Differential pressure of the particle filter
Absolute pressure in particle filter
Corrected pressure before particle filter
Fuel quantity consumed since last succesful regeneration
Temperature before oxydation catalyst
Temperature before particle filter
Ratio between actual and maximal torque output
Current engine torque output
Desired drive torque

You can adjust the time step on when data is recorded, but it's a slide bar without units. I had it set in the middle which, for all these parameters, resulted in ~ 1.2 sec steps. This isn't fast enough to capture rapidly changing results like what's happening during rapid accelerations. But I included some plots of a section of the drive where I entered a freeway on ramp (coasting at first) and was able to fuel it hard for a bit (but there was a slow vehicle in front of me so I had to let up).

Interesting to see how the pre-injection pulses work. Under hard acceleration it seems it only uses 1 pre injection pulse (pulse # units are in usec). Also interesting to see the pressure across the DPF and the common rail fuel pressure as a function of engine load.

Maybe next weekend I can try to get faster steps while doing some hard runs.
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2011 335d 11.8 sec 120 mph 1/4 mile NHRA certified track

2004 Ram Cummins with lots-o-mods
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