GregH
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Leaf Number: 26967
Location: Irvine, CA

Re: CANbus 0-60 time

Fri Aug 19, 2011 2:39 pm

I seem to recall both volts and amps being divide by 2.. Ie 0.5V and 0.5A resolution. I'm now buffering the amps and showing the average of the 25 samples every 1/4 sec which gives me the illusion of something closer to 0.1A resolution (putting my trust in the dither).

I've also noted the 85+ kw power on full speed acceleration.. Pretty cool as we'd been told the motor was only 80kw.

I don't really have data logging on my display so I'm graphing the current at the bottom of the 128 pixel screen with the option of a sample every 2.5, 10, or 60 seconds (ie, the last 5min, 20min or 2hrs).. I hope to use this to catch charger "sips" during balancing at end of charge.. This morning again tried to go to 100% and only reached 274 RAhC/SOC#... forced it tom charge again and got to 276, but no sign of sips after. I hate not having regen driving at 90+% SOC.. Just feels wrong.
'17 blue Volt Premier w/ACC
'12 SL black Leaf
'11 SL blue Leaf
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garygid
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Leaf Number: 000855
Location: Laguna Hills, Orange Co, CA

Re: CANbus 0-60 time

Sat Aug 20, 2011 1:16 am

It would help to know exactly what bits you use, and your scaling.

Volts need to be (roughly) between 300 and 400 for the pack.

The 16-amp L2 charging DC Pack amps should be about 8 or 9 amps (when near full, before tapering off), I suspect.
See SOC/GID-Meter and CAN-Do Info
2010 Prius, now for sale
2011 LEAF, sold in 2015
2018 Tesla Model 3
2014 Tesla S, Model 3 in 2019
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GroundLoop
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Re: CANbus 0-60 time

Sat Aug 20, 2011 9:19 pm

Sparky, I have a a Race Tech DL1 you can borrow if you want to compare these numbers to accelerometer/GPS readings. I think it has enough resolution you could confirm some of these scaling values.

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Brightonuk
Posts: 489
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Delivery Date: 28 Nov 2011
Location: Plantation , FL
Contact: Website WLM

Re: CANbus 0-60 time

Fri Feb 17, 2012 12:09 pm

So it is confirmed 0-60 9 seconds?

Does anyone know the 0-94 time (I was going to try it this morning, got to 83mph in the hammer lane on I75 and I passed a State Trooper in the slow lane) so I hit eco mode fast.............no ticket :D

Reddy
Posts: 1544
Joined: Fri Feb 11, 2011 3:09 pm
Delivery Date: 18 Aug 2011
Leaf Number: 006828
Location: Pasco, WA

Re: CANbus 0-60 time

Fri Feb 17, 2012 1:00 pm

Herm wrote:With a long and steady braking run you could work out the kwh/m number for the regen events.. then we would know efficient regen is in recovering energy.

We know regen is not 100% efficient but it would be nice to pin down the real number.

My thoughts as well. I would suggest running up to 60 mph then slowing down under three conditions:
1) In D only allowing the car to slow down to less than 10 mph, maybe even 5 mph before braking.
2) In ECO to the same stop or speed.
3) In ECO, but braking steadily at about twice the force of ECO regen down to the same stop or speed.

Then let's integrate those graphs.

Reddy.
Reddy
2011 SL; 9 bar, 45.80 AHr; 45,000 mi; rcv'd Aug 18, 2011
Long: http://www.mynissanleaf.com/viewtopic.p ... al#p226115"
Cold: http://www.mynissanleaf.com/viewtopic.p ... 60#p243033"

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TomT
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Leaf Number: 000360
Location: California, now Georgia
Contact: Website

Re: CANbus 0-60 time

Fri Feb 17, 2012 1:06 pm

Around 9.7 is what most of the instrumented tests have shown...

Brightonuk wrote:So it is confirmed 0-60 9 seconds?
Leaf SL 2011 to 2016, Volt Premier 2016 to 2019, and now:
2019 Model 3; LR, RWD, FSD, 19" Sport Wheels, silver/black; built 3/17/19, delivered 3/29/19.

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Brightonuk
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Delivery Date: 28 Nov 2011
Location: Plantation , FL
Contact: Website WLM

Re: CANbus 0-60 time

Fri Feb 17, 2012 1:25 pm

Wow it seems so much faster

I hope to pull a few Leaf drivers to a car meet tonight and as some of the cars are gonna be small imports with big exhausts you know the type I think this question may be asked.

In addition, can anyone tell me how far can you go? :lol:

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LTLFTcomposite
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Leaf Number: 5926
Location: Central FL

Re: CANbus 0-60 time

Fri Feb 17, 2012 1:43 pm

That 0-60 curve is more like a straight line than a curve. How does that compare to gas cars?

Just for laughs I went up against a friend's 550i at a light. For the first 50-100 feet I was ahead of him, then he left me in the dust. Totally non-scientific of course, as it could have just been reaction time hitting the gas.
LTL
White 2012 SV delivered 10 Dec 2011 returned 25 Nov 2014 replaced with stopgap ICE Sentra
[35 months] [35K miles] [9 Bars]
2013 Volt replaced after 36 months/30k miles with ICE Rogue
2016 SV-adjacent May 2016 lost 4th bar March 2018

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TomT
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Contact: Website

Re: CANbus 0-60 time

Fri Feb 17, 2012 1:53 pm

The inverter is not 100% efficient so it is going to have to pull more than 80Kw from the pack to send 80Kw to the motor... The car measures the power flowing in to the inverter, not going to the motor. Thus, that is exactly what I would expect to see.

GregH wrote:I've also noted the 85+ kw power on full speed acceleration.. Pretty cool as we'd been told the motor was only 80kw.
Last edited by TomT on Fri Feb 17, 2012 3:19 pm, edited 1 time in total.
Leaf SL 2011 to 2016, Volt Premier 2016 to 2019, and now:
2019 Model 3; LR, RWD, FSD, 19" Sport Wheels, silver/black; built 3/17/19, delivered 3/29/19.

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Nubo
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Delivery Date: 31 Oct 2014
Location: Vallejo, CA

Re: CANbus 0-60 time

Fri Feb 17, 2012 2:55 pm

My LEAF often chirps the tires a bit under full accel from a stop. Those graphs look like it feels. Sudden movement, a very brief lull, wheels chirp, and then the railgun effect :)
I noticed you're still working with polymers.

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