Go Back   EcoModder Forum > EcoModding > Hybrids
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 01-26-2010, 10:59 AM   #21 (permalink)
EcoModding Apprentice
 
Join Date: Aug 2008
Location: Lake Charles
Posts: 193

Black Beauty - '09 Honda Accord EX-L
90 day: 27.44 mpg (US)
Thanks: 12
Thanked 11 Times in 10 Posts
Quote:
Originally Posted by NeilBlanchard View Post
The other reason I have heard for why they did the Volt this way, is to force you to always plug it in when you can. It makes just enough as it goes along, and then you will plug it in to get a more efficient energy source.
Good idea.

Engineer the car to drive slower once the battery pack gets low. You would encourage people to charge up more often at the same time reduce gas consumption by FORCING responsible driving habits.

I guess this means that the chances of a cel-phone wearing, redneck Volt driver cutting you off in a highway construction zone is going to be rather slim. Ha!

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 01-26-2010, 11:55 AM   #22 (permalink)
...beats walking...
 
Join Date: Jul 2009
Location: .
Posts: 6,191
Thanks: 179
Thanked 1,521 Times in 1,122 Posts
Quote:
Originally Posted by rgathright View Post
Good idea.

Engineer the car to drive slower once the battery pack gets low. You would encourage people to charge up more often at the same time reduce gas consumption by FORCING responsible driving habits.
...should get really interesting just about the moment you start up and onto the freeway "on" ramp!
  Reply With Quote
Old 01-26-2010, 12:20 PM   #23 (permalink)
EcoModding Apprentice
 
Join Date: Aug 2008
Location: Lake Charles
Posts: 193

Black Beauty - '09 Honda Accord EX-L
90 day: 27.44 mpg (US)
Thanks: 12
Thanked 11 Times in 10 Posts
Quote:
Originally Posted by Old Tele man View Post
...should get really interesting just about the moment you start up and onto the freeway "on" ramp!
No, in this case you would be looking to get on the freeway using a "down" ramp.
  Reply With Quote
Old 01-28-2010, 05:52 PM   #24 (permalink)
Pokémoderator
 
cfg83's Avatar
 
Join Date: Dec 2007
Location: Southern California
Posts: 5,864

1999 Saturn SW2 - '99 Saturn SW2 Wagon
Team Saturn
90 day: 40.49 mpg (US)
Thanks: 439
Thanked 528 Times in 355 Posts
Hello -

I thought this was interesting :

2011 Chevrolet Volt - Chevy Electric Midsize Sedan - Automobile Magazine
Quote:
(Page 3) ... In Sport mode, the electric motor turns the front wheels with 149 horsepower through a single-speed gear reducer (versus 121 horsepower in the Regular mode). The 71-horsepower engine doesn't match that so the battery is allowed to drain a bit below the normal minimal state of charge threshold to assist. When regen is available, that 'borrowed' charge is restored. However, the battery is never fully replenished during driving because it's cheaper and greener to draw that power from the electrical grid by plugging in the charger. In pursuit of a 10-year, 150,000 mile service life, the strategy is to treat the 400 or so lithium-ion cells with kid gloves. That means charging the battery only after it's heated to room temperature by a system that circulates warm anti-freeze through its confines. Also, only half of the battery's full 16 kilowatts of energy is ever intentionally used. While GM has not specified the exact limits, the guess is that the state of the charge is never allowed to drop below 30 percent or rise above 80-percent in the interests of battery longevity.
Does the Prius or Insight try to keep the batteries warm during recharging?

CarloSW2
__________________

What's your EPA MPG? Go Here and find out!
American Solar Energy Society
  Reply With Quote
Old 01-28-2010, 07:30 PM   #25 (permalink)
Left Lane Ecodriver
 
RobertSmalls's Avatar
 
Join Date: Aug 2008
Location: Buffalo, NY, USA
Posts: 2,258

Prius C - '12 Toyota Prius C
Thanks: 79
Thanked 284 Times in 197 Posts
The 2000 Insight simply refuses to charge its batteries very hard when they're very cold. Regen starts to fall off when it's below freezing out, and at 10°F, I have almost none. Assist is also reduced with temperature, and at -20°F the 12V starter gets used. The Volt has lithium ion batteries instead of my NiMH, but I imagine they'll be all but useless in frigid weather.
  Reply With Quote
The Following User Says Thank You to RobertSmalls For This Useful Post:
cfg83 (01-28-2010)
Old 01-28-2010, 10:10 PM   #26 (permalink)
home of the odd vehicles
 
rmay635703's Avatar
 
Join Date: Jun 2008
Location: Somewhere in WI
Posts: 3,328

Silver - '10 Chevy Cobalt XFE
Thanks: 350
Thanked 665 Times in 497 Posts
What I don't get is why they need a 1.4ltr on a series hybrid.

The whole purpose of a series hybrid is to use a taylored high efficiency SINGLE SPEED motor to drive your genny. Like the 60mpg military turbine generator powered humvy we all got our panties in a bind about several years ago. You can easily gain 25% by setting a motor up to be tuned for one speed.

Also to me that would mean a 1ltr NON TURBO should be sufficient to maintain 65mph. (And I doubt GM would have any trouble finding a 1ltr engine, it seems many here still drive one with a GMish badge on it.)

Your goal of coarse would be to fire up the motor to the ideal operating speed REGARDLESS of vehicle speed once the generator charges the batteries a predetermined ideal amount (depends on how long the motor takes to get "ideal") Then shut down and cycle on and off as needed while the vehicle motors along. Sort of like pulse and glide, allows the motor to only operate in its most efficient band.
  Reply With Quote
Old 01-29-2010, 12:05 AM   #27 (permalink)
Master EcoModder
 
NeilBlanchard's Avatar
 
Join Date: May 2008
Location: Maynard, MA Eaarth
Posts: 7,873

Mica Blue - '05 Scion xA RS 2.0
Team Toyota
90 day: 42.48 mpg (US)

Forest - '15 Nissan Leaf S
Team Nissan
90 day: 156.46 mpg (US)

Number 7 - '15 VW e-Golf SEL
TEAM VW AUDI Group
90 day: 155.81 mpg (US)
Thanks: 3,388
Thanked 2,883 Times in 1,812 Posts
That is one way to set up a serial hybrid, but Chevy has not done it that way -- they vary the ICE RPM's to adjust to the required power, and they do not charge the battery with the ICE. The reason they do this (they say) is to force you to recharge it when you get to a plug.

I'm not sure this is the right choice, overall -- but I'm sure it depends on how much you drive it each day. I think that since they had to do parts bin engineering, and used the 1.4L to begin with, they may have made the best choice for this design...
__________________
Sincerely, Neil

http://neilblanchard.blogspot.com/
  Reply With Quote
Old 01-29-2010, 03:34 AM   #28 (permalink)
Pokémoderator
 
cfg83's Avatar
 
Join Date: Dec 2007
Location: Southern California
Posts: 5,864

1999 Saturn SW2 - '99 Saturn SW2 Wagon
Team Saturn
90 day: 40.49 mpg (US)
Thanks: 439
Thanked 528 Times in 355 Posts
NeilBlanchard -

Quote:
Originally Posted by NeilBlanchard View Post
That is one way to set up a serial hybrid, but Chevy has not done it that way -- they vary the ICE RPM's to adjust to the required power, and they do not charge the battery with the ICE. The reason they do this (they say) is to force you to recharge it when you get to a plug.

I'm not sure this is the right choice, overall -- but I'm sure it depends on how much you drive it each day. I think that since they had to do parts bin engineering, and used the 1.4L to begin with, they may have made the best choice for this design...
I agree. We know a 1.0 turbo was in the running. I don't have the URL, but I *thought* a non-turbo 1.0 was also considered (but maybe the 1.0 was always a turbo).

At then end of the day they went with the 1.4. The latest Prius is up to a 1.8 @ 3000 lbs curb weight. A Volt with a 1.4 @ 3500 lbs curb weight is "reasonable" to me.

CarloSW2
__________________

What's your EPA MPG? Go Here and find out!
American Solar Energy Society
  Reply With Quote
Old 01-30-2010, 09:24 PM   #29 (permalink)
home of the odd vehicles
 
rmay635703's Avatar
 
Join Date: Jun 2008
Location: Somewhere in WI
Posts: 3,328

Silver - '10 Chevy Cobalt XFE
Thanks: 350
Thanked 665 Times in 497 Posts
Quote:
Originally Posted by NeilBlanchard View Post
That is one way to set up a serial hybrid, but Chevy has not done it that way -- they vary the ICE RPM's to adjust to the required power, and they do not charge the battery with the ICE. The reason they do this (they say) is to force you to recharge it when you get to a plug.

I'm not sure this is the right choice, overall -- but I'm sure it depends on how much you drive it each day. I think that since they had to do parts bin engineering, and used the 1.4L to begin with, they may have made the best choice for this design...
Sounds to me that they were actually just being lazy as that requires less R&D to determine optimal operation and discharge/recharge intervals.

Any motor, even their stock 1.4l has an ideal power output, keeping the motor there as much as possible is always better than the nearly 50% variation in efficiency when you run the gamut from idle to WOT.

This brings up a point, since the motor is decoupled seems that an ECU reprogram or a manual control of the ice could allow future owners to improve the ICE mode operation of their volt.
  Reply With Quote
Old 01-30-2010, 10:53 PM   #30 (permalink)
Driving the TurboWeasel
 
Join Date: Mar 2009
Location: Steuben County, NY
Posts: 459
Thanks: 14
Thanked 18 Times in 17 Posts
If it works and is affordable to us, then great!

__________________
2012 Chevrolet Cruze Eco 6MT
  Reply With Quote
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
"The Volt" May BE SCRAPPED!- NEVER BUILT!! Jammer Hybrids 460 08-22-2013 08:08 PM
GM to offer 100% battery powered Volt (no engine/generator) MetroMPG Fossil Fuel Free 7 01-14-2010 09:31 PM
News: GM planning dedicated high efficiency hybrid (in addition to the Volt) MetroMPG Hybrids 17 07-16-2009 11:20 PM
GM admits the Volt concept car's aerodynamics suck MetroMPG Aerodynamics 16 12-13-2008 02:16 PM
Chevy Volt and GM Get Big Boost From $700B Bailout Vote Today Matt Herring EcoModding Central 15 10-09-2008 05:20 AM



Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com