Quote:
Originally Posted by aerohead
In past years the Society of Automotive Engineers SAE published reports on road-testing protocols.
There recommendations were to do a preliminary warm-up cycle of at least 35-kilometers at a continuous 80 km/h in order to stabilize the tires and all lubricants at an equilibrium temperature,and in so doing,stabilize the powertrain losses.
Without the warming cycle,mpg numbers were penalized until the vehicle reached 'equilibrium.'
I wasn't sure that you might be doing this during tests.Just wanted to mention it.  |
I did with stabilizaed fue and coolant temperatures, I'm limited of 3 channels recording with vag-com (1 channel 4.5 Hz, 3 channel 1.5 Hz), I could measure intake temps also (all the test ambient temperature ranged from 18 to 21ºC, 291 to 294K ik think it's the same), I run 2 km of city, 22 km at 122 kmh, 22 km at 94, 22 km at 80, and sometimes some power torque curves or more speed.
TEmperatures oscillations were low, and I seen at 122 and with grill blocked stabilizez temps in first km and minutes. I did test in the same conditions I could. I plot the data in Excel and did averages and std. desv. and all of them are compatible. Maybe 122 runs were affected a lot and better fuel consumption could be measured.
I've seen oil temp in previous Tdi I get on MFA and vag-com, but I need to find if exists on my engine i what channel (I don't have label file of exact block names for my BXE engine).
I used to pre-warm the engine before Vehicle Technical Inspection (ITV in spain) with A/C at maximum
and without turning off the engine when in line, because here opacity and emissions are measured (I clean EGR and Intake if needed as periodical maintenance). I'm scientist but in my University we don't have acces to SAE, because almost of the engeeners are in the Polytechnic University of Valencia.
A sample of what I get with logging includes:
,Group A:,'006,,,,Group B:,'007,,,,Group C:,'015
,,Speed,Bin. Bits,Load,Bin. Bits,,Temperature, ,Temperature,Temperature,,RPM,Torque,Fuel Consump.,Torque
I attached some plots of my fuel consumption model, data logged using vag-com, and a table of averages values and standard devisation.
Added answers and fuel "improvements" using a 90% upper block made from polycarbonate. And different values measured from different cam timing with this new aerodynamic setup. In this thread:
http://ecomodder.com/forum/showthrea...3-a-19233.html