Go Back   EcoModder Forum > EcoModding > General Efficiency Discussion
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 02-09-2011, 10:12 AM   #1 (permalink)
Master EcoModder
 
NeilBlanchard's Avatar
 
Join Date: May 2008
Location: Maynard, MA Eaarth
Posts: 7,856

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: 3,355
Thanked 2,860 Times in 1,798 Posts
Suspension Efficiencies

Here's how an ideal suspension could work:

Hydraulic springs and dampening to gain regenerative electrical power, and get ride height and leveling all in the same system.

Ride leveling is important especially in a low aerodynamic drag car -- if the "angle of attack" is wrong then much of the low drag benefits are lost. Ride leveling is also important for aspects of drag, and stability. CitroŽn has these features in many of their cars.

The CitroŽn 2CV also has a feature that could be a useful example: it uses a centralized dampener for both the front and rear suspension. If this was combined with a hydraulic *spring* system that also does the dampening, then much more energy could be regained, maybe?

So, how could this work? How much energy could be regained do you think?

__________________
Sincerely, Neil

http://neilblanchard.blogspot.com/
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 02-09-2011, 11:43 AM   #2 (permalink)
Master EcoModder
 
Join Date: Mar 2009
Location: Northeast Ohio
Posts: 269

The Wife's Hot Rod - '09 Pontiac G8 GT
Last 3: 23.22 mpg (US)

Big Outback - '13 Subaru Outback 2.5i

Little Outback - '02 Subaru Impreza Outback Sport
Thanks: 0
Thanked 16 Times in 16 Posts
Neil,

Somewhere on here there was an article about a shock absorber that generated electricity using a coil in the body & magnets on the shaft. Not unlike what you are describing. In that article it stated that a commercial truck could generate in the neighborhood of 1kW of power at highway speeds. I believe MIT was involved.

Don
  Reply With Quote
Old 02-09-2011, 12:43 PM   #3 (permalink)
Master EcoModder
 
NeilBlanchard's Avatar
 
Join Date: May 2008
Location: Maynard, MA Eaarth
Posts: 7,856

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: 3,355
Thanked 2,860 Times in 1,798 Posts
Yep, the company that makes those is called Levant Power:

Levant Power Corp.

They are shock absorbers; not springs; and as far as I know, they do not provide ride leveling or height adjustment.
__________________
Sincerely, Neil

http://neilblanchard.blogspot.com/
  Reply With Quote
Old 02-09-2011, 01:43 PM   #4 (permalink)
...beats walking...
 
Join Date: Jul 2009
Location: .
Posts: 6,191
Thanks: 179
Thanked 1,521 Times in 1,122 Posts
...sounds like a 'suspension' application of the old drum brake double-ended, piston cylinder...accommodates slightly different movement of forward and trailing "shoes."
  Reply With Quote
Old 02-12-2011, 01:25 AM   #5 (permalink)
.........................
 
darcane's Avatar
 
Join Date: Aug 2009
Location: Buckley, WA
Posts: 1,586

Ninja 650R - '06 Kawasaki Ninja 650R
90 day: 52.02 mpg (US)

B*tch - '01 Honda Civic HX
Team Honda
90 day: 38.09 mpg (US)

Ms. Hyde - '06 Cadillac CTS V
Sports Cars
90 day: 16.93 mpg (US)
Thanks: 375
Thanked 480 Times in 311 Posts
Quote:
Originally Posted by NeilBlanchard View Post
Here's how an ideal suspension could work:

Hydraulic springs ...
This makes some sense... but what is a "Hydraulic Spring"?

Hydraulic fluids are typically incompressible, so you can't use a hydraulic cylinder as a spring. If you are thinking of just a hydraulic cylinder replacing the spring and routing the fluid to a some device to harness the power generated... well, the suspension will just collapse once and the car will stay on the ground. You still need an actual spring in the system.

Mike
__________________
2001 Civic HX Mods


Past Cars:
CTS-V

2003 Silverado Mods
  Reply With Quote
Old 02-12-2011, 12:12 PM   #6 (permalink)
The PRC.
 
Join Date: Oct 2009
Location: Elsewhere.
Posts: 5,304
Thanks: 285
Thanked 535 Times in 384 Posts
Quote:
Originally Posted by NeilBlanchard View Post
The CitroŽn 2CV also has a feature that could be a useful example: it uses a centralized dampener for both the front and rear suspension. If this was combined with a hydraulic *spring* system that also does the dampening, then much more energy could be regained, maybe?

So, how could this work? How much energy could be regained do you think?
The 2CV system was designed to keep the car level with the long suspension travel designed to cope with the rural roads of 1930s France - the original design spec said a basket of eggs should be placed on the rear seat and driven across a ploughed field. So the energy gained at one end when the suspension was compressed was used at the other end to raise the suspension - result = car stays level = better ride.

The 2cv was also very light, so if you captured the energy how would this be done ? Batteries are heavy although I have read the posts on aero vs weight for better MPG ?

__________________
[I]So long and thanks for all the fish.[/I]
  Reply With Quote
Reply  Post New Thread


Thread Tools




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