[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [now non-roc]Re: Radiator Fan Question
My apoligies for insulting the towmotor/forklift crowd. However, it
appears that either Toyota/Mitsu/Nissan's engineering is faulty, or your
comprehension of their technology is.
A brief quote from Toyota Canada's Prius hybrid web page concerning that
car's regnerative braking technology:
During deceleration, this system captures the energy that is normally lost
as heat caused by brake friction and stores it in the battery.
You can read the glossy at:
http://www.toyota.ca/cgi-bin/WebObjects/WWW.woa/3/wo/uj60009B500Bq5003/10.5?n201000e%2ehtml
You state below that regnerative braking "only redirects unused energy
back into the battery". Where I come from we call this "recharging" the
battery... :)
Have a nice day.
Drew
On Fri, 10 Mar 2000, Ryan McCarthy wrote:
> Rusty towmotor? The machines I work on are state of the art, cutting edge
> technology. They cost between 15 and 30 thousand dollars apiece. They use
> the latest technologies in electronic control, vehicle management, onboard
> diagnostics and energy management. Do you realize that these companies
> (Toyota, Mitsubishi, Nissan) have been making electric forklifts for
> decades? Where do you think they're getting this technology from. I'm sorry,
> but this is not something new. Regenerative braking only redirects unused
> energy back into the battery. How can a motor consume energy and also
> produce it at the same time? Please, before you tell someone that has been
> wortking with this "cutting edge technology" for many years now that they
> are wrong based on an article you read, become a little more informed.
>
> >
> > The article on the Toyota EV I read did detail the regenerative braking
> > which _was_ used to reclaim electrical energy which _was_ in turn stored
> > in the battery. If it wasn't used to "re"generate the battery, why would
> > it be called regenerative braking? If you are interested, I will see if I
> > can find links with more info. Remember, this is cutting edge electric
> > vehichle technology, not a rusty tow motor in the back warehouse...
> > Major automakers are investing millions in this kind of research - in
> > search of a real-world ZEV.
> >
> > Drew
> >
> > On Thu, 9 Mar 2000, Ryan McCarthy wrote:
> >
> > > Regenerative braking does not charge a battery. I'm an electric forklift
> > > mechanic and a great majority of the machinery I work on uses
> regenerative
> > > braking. What it actually does is just return what has already been
> taken.
> > > Regen braking actually works when you apply a reverse polarity to the
> motor
> > > in order to slow the vehicle. Now, when you do that, there's a bunch of
> > > energy basically that has nothing to do, nowhere to go. If left with no
> > > where to go, it turns into heat. The regen redirects this energy back
> into
> > > the battery so as not to toast your motor and electronic devices. There
> is
> > > no charging taking place. They do, however, use a diode setup that
> actually
> > > can allow an electric motor to produce some of it's own energy. But,
> again,
> > > this just lessens the load on the battery, it does not produce any gains
> in
> > > charge.
> > >
> > > Sorry, school's over...
> > >
> > > Ryan M
> > >
> > >
> > >
> > > >
> > > > Current EV technology is exploiting regenerative braking. The drive
> > > > motors, when enagegd will generate electricity to charge the onboard
> > > > batteries as the vehicle is slowing down. The increased load of the
> > > > motor-generators serves as a brake for the vehicle. I believe that
> > > > Toyota's current hybrid uses this technology, and perhaps GM's next
> > > > generation EV as well?
> > > >
> > > > I'm surprised that there would be any noticeable gain from a fan
> driven
> > > > gnerator. Any power from the fan would come at the expensive of more
> > > > battery energy to the wheels to overcome the increased drag. One of
> those
> > > > fundamental laws of physics teaches us something about this, I
> believe...
> > > > :) I'm not sure I'd reccommend financing this guy's idea... :)
> > > >
> > > > Drew
> > > >
> > > > On Thu, 9 Mar 2000, Ewan Hopkins wrote:
> > > >
> > > > > This reminds me of a news item I saw recently where a guy in
> Scotland
> > > has
> > > > > supposedly developed a system for an electric car which is basically
> a
> > > fan
> > > > > generator in the engine bay, hooked-up to the car's battery cells.
> He
> > > > > reckons that, above 30-40mph, the generator produces enough
> electricity
> > > to
> > > > > usefully extend the range of the car. He's installed a prototype
> into a
> > > > > Honda electric car and he's apparently trying to get together the
> > > funding to
> > > > > exploit this idea commercially.
> > > > >
> > > > >
> > > > > Ewan Hopkins...
> > > > >
> > > > > '85 Storm 2.0
> > > > > '86 GT 1.8
> > > > >
> > > > >
> > > > > >From: "Chris DeLong" <green536@hotmail.com>
> > > > > >To: tberk@mindspring.com, e@sbbs.se
> > > > > >CC: scirocco-l@scirocco.org
> > > > > >Subject: Re: Radiator Fan Question
> > > > > >Date: Wed, 08 Mar 2000 23:21:28 PST
> > > > > >
> > > > > >
> > > > > >>
> > > > > >>Here's the follow up question;
> > > > > >>
> > > > > >>At high speed does the fan's freewheeling actually create energy
> > > > > >>output back into the 12 volt system?
> > > > > >
> > > > > >Unfortunately it would only do this if you had the fan switch
> bypassed
> > > ;)
> > > > > >
> > > > > >>
> > > > > >
> > > > > >
> > > > > >Chris DeLong
> > > > > >ICQ#45030867
> > > > > >Seattle, WA USA
> > > > > >'80 16V Rag
> > > > > >'80 Rocco (new!)
> > > > > >'65 Bus (ugly, but good for campin' W/toaster oven)
> > > > > >'82 GLI (now with a happy shaved, solenoid operated trunk)
> > > > > >'80 'Vert
> > > > > >'61 17 Window
> > > > > >'78 Scirocco
> > > > > >
> > > > > >
> > > > > >______________________________________________________
> > > > > >Get Your Private, Free Email at http://www.hotmail.com
> > > > > >
> > > > > >
> > > > > >--
> > > > > >Email problems to: scirocco-l-probs@scirocco.org To unsubscibe
> send
> > > > > >"unsubscribe scirocco-l" in the message to majordomo@scirocco.org
> > > > > >
> > > > >
> > > > >
> > > > > ______________________________________________________
> > > > > Get Your Private, Free Email at http://www.hotmail.com
> > > > >
> > > > >
> > > > > --
> > > > > Email problems to: scirocco-l-probs@scirocco.org To unsubscibe send
> > > > > "unsubscribe scirocco-l" in the message to majordomo@scirocco.org
> > > > >
> > > >
> > > > Drew MacPherson, Network Analyst, University of Guelph
> > > >
> > > > drew@dyermaker.cs.uoguelph.ca | visit the Massey-Harris
> page:
> > > > http://dyermaker.cs.uoguelph.ca/~drew | http://m-h.cs.uoguelph.ca
> > > >
> > > >
> > > > --
> > > > Email problems to: scirocco-l-probs@scirocco.org To unsubscibe send
> > > > "unsubscribe scirocco-l" in the message to majordomo@scirocco.org
> > > >
> > >
> > >
> > >
> > >
> > > --
> > > Email problems to: scirocco-l-probs@scirocco.org To unsubscibe send
> > > "unsubscribe scirocco-l" in the message to majordomo@scirocco.org
> > >
> >
> > Drew MacPherson, Network Analyst, University of Guelph
> >
> > drew@dyermaker.cs.uoguelph.ca | visit the Massey-Harris page:
> > http://dyermaker.cs.uoguelph.ca/~drew | http://m-h.cs.uoguelph.ca
> >
>
>
>
Drew MacPherson, Network Analyst, University of Guelph
drew@dyermaker.cs.uoguelph.ca | visit the Massey-Harris page:
http://dyermaker.cs.uoguelph.ca/~drew | http://m-h.cs.uoguelph.ca
--
Email problems to: scirocco-l-probs@scirocco.org To unsubscibe send
"unsubscribe scirocco-l" in the message to majordomo@scirocco.org