Go Back   EcoModder Forum > EcoModding > Fossil Fuel Free
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 03-24-2013, 10:33 PM   #231 (permalink)
Master EcoModder
 
Join Date: Nov 2008
Location: Massachusetts, USA
Posts: 442
Thanks: 1
Thanked 57 Times in 43 Posts
This past Thursday I took my EV on a whooping round trip of 39.6 miles for a job interview! I used heat for 22.6 of those miles and it was some of the hilliest roads I've ever been on!

I ended up putting 15.41 KWh back into the pack. Assuming my charger is 92% efficient, I had an overall efficiency of 358 Wh/Mi from the batteries. That gives me a 58 mile range in the winter when driving 45 MPH and under with hills.

I really want to improve that. I know my heater is knocking off some range, but I also think my tire pressure is too low and I am really wondering if my back being lower than the front is having a massive effect on it. I wasn't also to install my Skunk2 lowering springs on the cheap struts so I think some compatible struts in the front will be in order.

__________________
Civic EV http://2001-civic-ev.blogspot.com/
Solectria Force http://solectriaforce.blogspot.com/
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 03-25-2013, 10:39 AM   #232 (permalink)
EcoModding Apprentice
 
Blue Angel's Avatar
 
Join Date: Feb 2013
Location: Ottawa, ON, Canada
Posts: 182

Cruze Eco MT - '12 Chevrolet Cruze Eco MT
Team Chevy
90 day: 44.29 mpg (US)
Thanks: 17
Thanked 58 Times in 37 Posts
You should weigh the car front and rear to get a weight distribution measurement before modding the suspension. If possible, get the current spring rates and the original f/r distribution and then try to keep the spring rate matched to the weight at each end (based on how the stock car was set up). Failing to do something along these lines could result in a car with pretty strange, and maybe unsafe, at the limit handling.
__________________
2012 Cruze Eco 6MT
If it's slow, it might as well be efficient!

  Reply With Quote
The Following User Says Thank You to Blue Angel For This Useful Post:
gone7 (05-01-2013)
Old 03-25-2013, 10:44 AM   #233 (permalink)
Administrator
 
Daox's Avatar
 
Join Date: Dec 2007
Location: Germantown, WI
Posts: 11,158

CM400E - '81 Honda CM400E
90 day: 51.49 mpg (US)

Daox's Grey Prius - '04 Toyota Prius
Team Toyota
90 day: 49.53 mpg (US)

Daox's Insight - '00 Honda Insight
90 day: 64.33 mpg (US)

Swarthy - '14 Mitsubishi Mirage DE
Mitsubishi
90 day: 56.69 mpg (US)
Thanks: 2,459
Thanked 2,529 Times in 1,526 Posts
358 is fairly reasonable. The warp engines are efficient, but not as much as AC induction motors, so you'll not likely see the 250 Wh/mile that most OEMs seem to go by. Even that I think is more of a 'summer rating'. I haven't heard of what kind of wh/mile Leafs and Volts are getting in winter.
__________________
Current project: A better alternator delete
  Reply With Quote
Old 03-25-2013, 03:11 PM   #234 (permalink)
Master EcoModder
 
Join Date: Nov 2008
Location: Massachusetts, USA
Posts: 442
Thanks: 1
Thanked 57 Times in 43 Posts
Quote:
Originally Posted by Daox View Post
358 is fairly reasonable. The warp engines are efficient, but not as much as AC induction motors, so you'll not likely see the 250 Wh/mile that most OEMs seem to go by. Even that I think is more of a 'summer rating'. I haven't heard of what kind of wh/mile Leafs and Volts are getting in winter.
This past fall I was doing 295 WH/Mi from the wall, and once I did 271 WH/Mi so I know there is some room for improvement. I think what I really need to do is get my volt/current meter installed so I can actually see where I can do better.
__________________
Civic EV http://2001-civic-ev.blogspot.com/
Solectria Force http://solectriaforce.blogspot.com/
  Reply With Quote
Old 03-30-2013, 08:32 AM   #235 (permalink)
Master EcoModder
 
Join Date: Nov 2008
Location: Massachusetts, USA
Posts: 442
Thanks: 1
Thanked 57 Times in 43 Posts
Yesterday I pumped up my tires before going on a 31.4 mile run for the day. I had about 40% 45 MPH highway and the rest 30-35 MPH stop on go traffic. I even had a bit of heat at the end of the day and my final WH/Mi from my Kilowatt meter was 327 WH/Mi!

That gives me a 63.6 mile range to 80% DoD. I'm going to check my tire pressure for real today as I didn't have a gauge so I just eyeballed it. I'm aiming for 40 PSI at the tires.
__________________
Civic EV http://2001-civic-ev.blogspot.com/
Solectria Force http://solectriaforce.blogspot.com/
  Reply With Quote
Old 03-30-2013, 09:30 AM   #236 (permalink)
In the fasting lane
 
RedDevil's Avatar
 
Join Date: Dec 2012
Location: Nieuwegein, the Netherlands
Posts: 3,865

Red Devil - '11 Honda Insight Elegance
Team Honda
90 day: 49.75 mpg (US)

It - '09 Hyundai I10 Active Cool
Team Hyundai
90 day: 29.76 mpg (US)
Thanks: 1,620
Thanked 2,133 Times in 1,375 Posts
You got the batteries in the back, right?
If those behave anything like the NiMH batteries in my hybrid (which vents the battery with air from the passenger compartment) they would benefit from being in the passenger compartment; as they seem to function best under temperatures that we find agreeable ourselves.
When they start to give off some heat after long use you'd need the heater less.
And you get better weight distribution and more boot space.
You do need some shielding though to be safe in case of a blowout.

Just a thought...
__________________
2011 Honda Insight + HID, LEDs, tiny PV panel, extra brake pad return springs, neutral wheel alignment, 44/42 PSI (air), PHEV light (inop), tightened wheel nut.
lifetime FE over 0.17 Gmeter or 0.1 Mmile.



“Great minds discuss ideas; average minds discuss events; small minds discuss people." - Eleanor Roosevelt
  Reply With Quote
Old 03-30-2013, 09:54 AM   #237 (permalink)
Administrator
 
Daox's Avatar
 
Join Date: Dec 2007
Location: Germantown, WI
Posts: 11,158

CM400E - '81 Honda CM400E
90 day: 51.49 mpg (US)

Daox's Grey Prius - '04 Toyota Prius
Team Toyota
90 day: 49.53 mpg (US)

Daox's Insight - '00 Honda Insight
90 day: 64.33 mpg (US)

Swarthy - '14 Mitsubishi Mirage DE
Mitsubishi
90 day: 56.69 mpg (US)
Thanks: 2,459
Thanked 2,529 Times in 1,526 Posts
Good point reddevil. Do you have any battery warming setup? Voltage sag under load is MUCH more pronounced when batteries are cold, thus you need more current for the same acceleration which is harder on the batteries, etc. etc.
__________________
Current project: A better alternator delete
  Reply With Quote
Old 03-30-2013, 10:38 AM   #238 (permalink)
Master EcoModder
 
Join Date: Nov 2008
Location: Massachusetts, USA
Posts: 442
Thanks: 1
Thanked 57 Times in 43 Posts
I don't have any heating setup for the batteries, or any insulation. As it warms up I'm getting I will see a huge increase in efficiency. Next year I will have insulation for my battery pack, but we are having much better weather these days and my current commute is only 33 miles round trip with charging at my destination.
__________________
Civic EV http://2001-civic-ev.blogspot.com/
Solectria Force http://solectriaforce.blogspot.com/
  Reply With Quote
Old 03-30-2013, 02:52 PM   #239 (permalink)
In the fasting lane
 
RedDevil's Avatar
 
Join Date: Dec 2012
Location: Nieuwegein, the Netherlands
Posts: 3,865

Red Devil - '11 Honda Insight Elegance
Team Honda
90 day: 49.75 mpg (US)

It - '09 Hyundai I10 Active Cool
Team Hyundai
90 day: 29.76 mpg (US)
Thanks: 1,620
Thanked 2,133 Times in 1,375 Posts
It works the other way tound too; when it gets hot Honda advises to use the airco to prevent the batteries from overheating, not just yourself. A/C off under desert conditions might hurt the pack...!
__________________
2011 Honda Insight + HID, LEDs, tiny PV panel, extra brake pad return springs, neutral wheel alignment, 44/42 PSI (air), PHEV light (inop), tightened wheel nut.
lifetime FE over 0.17 Gmeter or 0.1 Mmile.



“Great minds discuss ideas; average minds discuss events; small minds discuss people." - Eleanor Roosevelt
  Reply With Quote
Old 03-30-2013, 04:33 PM   #240 (permalink)
Master EcoModder
 
Join Date: Nov 2008
Location: Massachusetts, USA
Posts: 442
Thanks: 1
Thanked 57 Times in 43 Posts
Quote:
Originally Posted by RedDevil View Post
It works the other way tound too; when it gets hot Honda advises to use the airco to prevent the batteries from overheating, not just yourself. A/C off under desert conditions might hurt the pack...!
I don't stress my LiFePO4's enough to make them heat up, and on the hot days my sunroof is open keeping things cool, but I've never had the car past 100 F in the sun in the battery bank.

__________________
Civic EV http://2001-civic-ev.blogspot.com/
Solectria Force http://solectriaforce.blogspot.com/
  Reply With Quote
The Following User Says Thank You to TheSGC For This Useful Post:
Daox (03-31-2013)
Reply  Post New Thread


Thread Tools




Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com