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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 07-05-2011, 07:09 PM   #1 (permalink)
DieselMiser
 
ConnClark's Avatar
 
Join Date: Jun 2008
Location: Richland,WA
Posts: 966

Das Schlepper Frog - '85 Mercedes Benz 300SD
90 day: 23.23 mpg (US)

Gentoo320 - '04 Mercedes C320 4Matic
90 day: 22.44 mpg (US)
Thanks: 46
Thanked 227 Times in 156 Posts
Alternator modifications

I found a paper on improving alternator efficiency. With out a whole lot of work one could bump there car alternator efficiency by 4%.

http://itee.uq.edu.au/~aupec/aupec04.../PaperID82.pdf

__________________
  Reply With Quote
The Following User Says Thank You to ConnClark For This Useful Post:
Cd (07-28-2011)
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 07-05-2011, 09:34 PM   #2 (permalink)
DieselMiser
 
ConnClark's Avatar
 
Join Date: Jun 2008
Location: Richland,WA
Posts: 966

Das Schlepper Frog - '85 Mercedes Benz 300SD
90 day: 23.23 mpg (US)

Gentoo320 - '04 Mercedes C320 4Matic
90 day: 22.44 mpg (US)
Thanks: 46
Thanked 227 Times in 156 Posts
I'm also wondering about replacing the diodes in the alternator with ones that have a lower voltage drop.
__________________
  Reply With Quote
Old 07-06-2011, 04:41 AM   #3 (permalink)
aero guerrilla
 
Piwoslaw's Avatar
 
Join Date: Oct 2008
Location: Warsaw, Poland
Posts: 3,541

Svietlana II - '13 Peugeot 308SW e-HDI 6sp
90 day: 58.1 mpg (US)
Thanks: 1,056
Thanked 629 Times in 396 Posts
Downloaded for reading. Looks interesting.
__________________
e·co·mod·ding: the art of turning vehicles into what they should be

What matters is where you're going, not how fast.

"... we humans tend to screw up everything that's good enough as it is...or everything that we're attracted to, we love to go and defile it." - Chris Cornell

Piwoslaw's Peugeot 307sw modding thread

  Reply With Quote
Old 07-08-2011, 03:46 PM   #4 (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
Save time; Disconnect Alternator And Run On Battery

Some of you may remember me, I have always been a supporter of the idea of just disconnecting your alternator to increase MPG.

I did this on:
2004 4.7L Dodge Dakota
2004 Jeep TJ
2009 Honda Accord

I had no problems and was able to drive 75 miles before reaching 12.1 volts on the stock battery.

Today, I have a Group 24 Gel Cel in the trunk of my Honda and a quick alternator disconnect that can be used to turn off the alternator and go for about 50 miles in the summer heat without any worries.
  Reply With Quote
Old 07-08-2011, 04:23 PM   #5 (permalink)
EcoModding Lurker
 
Join Date: Jan 2008
Location: Maine
Posts: 77
Thanks: 9
Thanked 7 Times in 7 Posts
...or you could slow down by 1 MPH and probably get just as much benefit!
  Reply With Quote
Old 07-08-2011, 04:39 PM   #6 (permalink)
The PRC.
 
Join Date: Oct 2009
Location: Elsewhere.
Posts: 5,304
Thanks: 285
Thanked 535 Times in 384 Posts
Hyundai i10 "Blue" model in the UK has an "Alternator Management System" which seems to monitor when the engine is under load (e.g. climbing hills, accelerating hard) and reduces the demand from the Alternator from the engine. It also increases it when it can such as in gear downhill coasting etc.

Linky

Here is a pic from the brochure



The "Blue" (named after the VW/Merc "Blue" eco technology - well they don't want to give the Green Party any credit do they ?) failed for me because it's too expensive for what it is.
__________________
[I]So long and thanks for all the fish.[/I]
  Reply With Quote
Old 07-08-2011, 06:21 PM   #7 (permalink)
1995 Previa LE S/C Driver
 
Join Date: Dec 2009
Location: Stillwater, America
Posts: 59
Thanks: 31
Thanked 8 Times in 7 Posts
The engine being under higher load can demand more from the electrical system -- but I could be thinking in terms of points and condensor ignition. Changes in voltage can result in a weaker spark, which is the last thing you'd want.

Another mod that could be worthwhile (for those of us who love our forced-air HVAC) would be to replace the blower motor with something more efficient, or to lighten the fan blade assembly to reduce the torque needed to turn it. Maybe even to add an ultra-low speed to the blower motor so the A/C can be run with minimum blower electrical load. Most A/C will not engage the compressor if the fan isn't running, so to have a fractional amperage fan setting, or even an override if you're in the "Fresh" mode so that the A/C will run with the fan off, can save some electrical demand.

Tie the fan speed automatically dropping under high engine load with the alternator cutting out under the same conditions, so that you're not burdening the battery so much up those hills, and downhill, the battery recharges just that much faster.
  Reply With Quote
Old 07-08-2011, 07:03 PM   #8 (permalink)
EcoModding Lurker
 
Join Date: May 2011
Location: land of enchantment
Posts: 6
Thanks: 0
Thanked 1 Time in 1 Post
What about one of those "flexable" solar panels on the roof to keep the battery charged?
  Reply With Quote
Old 07-08-2011, 07:43 PM   #9 (permalink)
DieselMiser
 
ConnClark's Avatar
 
Join Date: Jun 2008
Location: Richland,WA
Posts: 966

Das Schlepper Frog - '85 Mercedes Benz 300SD
90 day: 23.23 mpg (US)

Gentoo320 - '04 Mercedes C320 4Matic
90 day: 22.44 mpg (US)
Thanks: 46
Thanked 227 Times in 156 Posts
Another interesting paper showing typical losses for each part of the alternator as well as potential savings of improving alternator efficiency.

http://www.delcoremy.com/Documents/H...ite-Paper.aspx

In it they say that the two leading losses of efficiency of an alternator are the Ohmic loss of the wire and the diode voltage drop.
__________________
  Reply With Quote
The Following User Says Thank You to ConnClark For This Useful Post:
ECONORAM (05-16-2013)
Old 07-08-2011, 07:50 PM   #10 (permalink)
EcoModding Apprentice
 
Join Date: Jun 2010
Location: New York
Posts: 239
Thanks: 0
Thanked 17 Times in 15 Posts
Quote:
Originally Posted by rgathright View Post
Some of you may remember me, I have always been a supporter of the idea of just disconnecting your alternator to increase MPG.

I did this on:
2004 4.7L Dodge Dakota
2004 Jeep TJ
2009 Honda Accord

I had no problems and was able to drive 75 miles before reaching 12.1 volts on the stock battery.

Today, I have a Group 24 Gel Cel in the trunk of my Honda and a quick alternator disconnect that can be used to turn off the alternator and go for about 50 miles in the summer heat without any worries.
On the Honda do you really gain much as Honda uses a 2 stage load alternator , ELD (runs at low outputs with low loads to increase mpg ) ?


Last edited by EdKiefer; 07-08-2011 at 07:55 PM..
  Reply With Quote
Reply  Post New Thread


Thread Tools




Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com