GenIII Prius Custom PIDs for Torque app

OK, so I tried it on my Phone and it worked fine. For some reason the tablet didnt want to play nice. I guess its probably the .zip file decoder I was using. Used a different one and it worked like a champ. Also disabled the seat belt beeps.

Very helpful and good info here , much appreciated!
Dave

 

I'm not able to unzip the archive, it claims to be corrupt. Can someone verify they are able to unzip, or would it be possible to repost the archive?

Thanks,
Michael

 

Michael, I was just able to d/l, unzip, and open the CSV file in Excel. My ODBII adapter is enroute from AH Design so I'll get to play soon too.

 

I bought a $15 bluetooth adapter from Amazon and it connected with my old Droid X no problem. I am excited to try out the full version of Torque and see what kind of information I can get. Thanks to all that have worked on the PID!

 

Ok, I received the BT ODBII device from AH Designs on Friday. I had already bought and installed Torque Pro on my Nexus 7. I was trying to follow the steps usbseawolf2000 gave, but Windows 7 would not display a .torque directory.

What I ended up doing was:

• I copied the zip file contents to the root directory of the Nexus 7
• I downloaded a free file manager app
• Using the file manager I copied the .csv file to the .torque/extendedpids
• To turn off the back up beep, I had to create a new PID, it did not import with all the others

Now, does anyone have a suggested list of PIDs they like to monitor the most? The entire list is overwhelming, so I plan to make a subset instead.

 

Has anyone had success in obtaining real-time BSFC (engine efficiency) in Torque (or any other application) utilizing the data from fuel consumption and engine power. I think if a single gauge of overall calculated system efficiency (derived from BSFC and drive-train efficiency) could be displayed it would be a winner not to mention safer.

 

What I found on my 2009 gen 2 Prius is that the engine efficiency is pretty much constant around 30%, independent of RPM, as long as the engine is working, not just idling. I imagine gen 3 would be the same if not better. So the real question is not whether nor how hard to pulse, but rather when to pulse (for pulse and glide). For example it's usually better to pulse uphill and glide downhill.

 

I came to the same conclusion. You can log engine torque, rpm, and fuel flow and then just calculate BSFC in a spreadsheet. Yo will find out that data is not so consistent, I got values from 210 - 260 g/kWh no mater the rpm, the problem is that one value can lag for several seconds or is not so precise, I don't exactly know what it is.

Just read what others are doing in practice, and pulse so that your speed will not fluctuate much. Use terrain, traffic, speed limits in your benefit and don't use the brakes.

 

USB: Do you know when Torque has gauges for both GPH and HP on the same active screen, can a custom 3rd gauge on the same screen use both of these values to perform a real-time calculation to produce the BSFC guage? I've noticed that when gauges are not on the active screen that they are apparently not updating values from the ECU.
Also I've think the HP value is derived from the g sensors, car weight, and speed as it seems to only shows when accelerating, so that won't be too helpful for BSFC in steady state cruising.

 

Thank so much, I'm going to try this. Now I suppose because the Torque and GPH are not captured at the exact same instant in time, this may only be more accurate in steady state conditions??? Do you know if there is a way to ensure the Actual Engine Torque PID to be read immediately (1/30 sec) before the GPH PID or could it happen they are read up to 2 seconds apart if one has 60 PIDs being read at 30 PID/sec? Maybe a case can be made for having a slight delay between the readings as there may be a natural time lag between the injector duty cycle increasing before the torque and rpms increasing. I have a $25 OBD BT device, so I don't know how many PID/sec I'm getting.

Of course if this works, the next step is a "System efficiency" gauge (inverse of BSFC combined with an equation that approximates transmission efficiency, perhaps a simple one at first using RPM and wheel speed PIDs) along with subtracting off the electrical power draw (A/C draw, charging HV) resulting in a simple higher number is better efficiency gauge.

 

My first attempt trying this at lunch today didn't work too well. I added the gauges for each, but the value was either 0.00 or showing a hyphen. I think it's because I didn't put in the correct spacing before/after the * and / operations. I left the PID field as "" Here's what I have for the new entries in the .csv file below. Please advise what I'm doing wrong.

"BSFC1 (Gal/HP)","BSFC (Gal/HP)","","(VAL{GPH}*100) / (VAL{Engine Speed_7E0}*VAL{Actual Engine Torque}/5252)","0","200","Gal/HP","7E0"

"HP BK","HP BK","","(VAL{Engine Speed_7E0}*VAL{Actual Engine Torque}/5252)","0","134","HP","7E0"

NOte: To not have a micro value number for BSFC, I modifed the equation to give larger number.

 

So I got a step closer on the commute home. Got the HP from Actual Engine Torque and Engine Speed working (took the _7E0 off the end) I used "MAF" without the air/fuel ratio just to get me going as fuel rate would be a function of this with air/fuel ratio hopefully fairly constant 14.7. It was interesting to see in real-time (about 1 update/sec) the HP to fuel rate ratio values being lowest corresponding to 10% into the ICE on region in the HSI all the way to the right end of the PWR area. As expected, it showed efficiency clearly dropping off (BSFC getting higher) by being too light or too heavy on the gas pedal, although I would like to add in the air/fuel ratio into the equation just to be more confident in the output. Now if it could update a little faster update rate, do i just reduce the number of gauges, I have about 20 on my tablet right now, or do I strip down the unnecessary entries in the csv file? I just got my first tablet (Hisense Pro 7") last week and first app I purchased was Torque, I figured this was a better deal than getting a Scangauge.

 

So I incorporated VAL{Fuel flow rate} into the equation along with a constant to give me a real-time BSFC value averaging 220 while cruising. However when not in a steady power/speed, it bounces around a lot, I'm finding the HSI or iMPG to more useful in such circumstances, possibly because the car ECU calculates their values much faster than the OBDII bluetooth stream speed.

One separate thing I'm wondering about, is that Torque displays an air/fuel ratio of about 14 most of the time and not 14.7 as I thought it would. Does the Prius run slightly rich for some reason?

 

Sorry for the late response, I have been on vacation.

I used built in fuel flow PID in cc/min, I don't know how accurate that is, checking option to calculate enhanced MPG may be good.

I caculated BSFC (g/kWh) with formula:
= (Fuel_flow/1000 * 60 * 750) / ((Actual_Engine_Torque(Nm) * 2 * 3.14159 * Engine_Speed(rpm)) / 60000)