Half a croissant, on a plate, with a sign in front of it saying '50c'
h a l f b a k e r y
carpe demi

idea: add, search, annotate, link, view, overview, recent, by name, random

meta: news, help, about, links, report a problem

account: browse anonymously, or get an account and write.



Towed vehicle automatically charged

Charge while Towing vehicle behind motorhome
  [vote for,

With so many motorhomes towing autos, Someone should design electric, towable cars that can make use of the rolling movement to charge the electric batteries. When towing across the country and parking the motorhome for the night, the towed vehicle is usually only needed to drive around for short distances, say up to 100 miles, before it is towed again, thus recharging it. Most motorhome driving consists of at least 250 miles a day which should provide sufficient charge. When parked for longer periods, the batteries could also be charged at the RV sites by plugging them in to the 30 or 50 amp circuits normally found there.
jannbrad, Aug 24 2003

Please log in.
If you're not logged in, you can see what this page looks like, but you will not be able to add anything.


       Why not charge it off the motorhome's engine? That way you don't have to lug a generator around with the electric car.
phoenix, Aug 24 2003

       "" ""
thumbwax, Aug 24 2003

       This would simply be an integration issue, since many electric car motor/controller systems work well as generators (used for regenerative braking). You just need to be able to control how much drag the car puts on the motorhome. Even better if the electric car can automatically assist with acceleration and braking.   

       Make sure to recharge at night most of the time though since electricity from the plug is much cheaper than generating it with an internal combustion engine.   

       [phoenix] I'm not sure what you're meaning. The electric car uses it's motor (needed for driving) as a generator, so it's not lugging around anything it doesn't need already. A motorhome's engine generates mechanical energy and uses a small innefficient alternator to produce small amounts of electrical energy. To produce enough electricity to charge an EV, you need a big generator attached to the engine. Luckily you already have one that's attached slightly indirectly through friction with the road.
scad mientist, Aug 25 2003

       <obligatory> RockyHUH! </o>
ato_de, Aug 25 2003

       [scad mientist] I didn't understand you intended the electric car to have a motor-generator. I assumed you were adding a generator to a device that already had a motor.   

       Even with the clarification, it seems a bit...utility specific.
phoenix, Aug 26 2003

       your towed car would act as a regenerative brake behind your RV. essentially, your RV engine is working harder to overcome the resistance of the towed car, generating the energy.   

       It would probably be more efficient to generate the electricity directly from the RV and charge the battery that way
dbsousa, Aug 26 2003

       Gets my vote. Once we can do this, then all we need is two cars. One drives while the other charges, then we switch. Agree with scad, on the need to deal with the issue of friction.
phreno, Aug 30 2003

       You're not using the "rolling movement" to charge the car, you'll be using the RV's engine. It would be cheaper to plug the car in, considering that power companies produce energy much more efficiently than automobiles do. The only time that rolling movement could be used is for regenerative braking.
scarecrow, Dec 26 2003

       just a point but the towed vehicle will be draining power from the rv as the engery it converts has to come from somewhere
engineer1, Feb 13 2004

       The + I gave this idea depends entirely on [scad]'s anno. If regenerative braking is used, this should work well.   

       [phnx] //utility specific// True, but it wouldn't need to be only designed for this. Just design some logic into an already designed electric car. You can then just use any motorhome and have the regenerative breaking in the car kick on whenever the breaklights come on.
Worldgineer, Feb 13 2004

       People who buy RV don't generlly car about the enviorment .. and ways... you would get better result adding a extra alternator to the main car engine and running it to the other car..
gezzuzz, Jul 13 2004

       what gezzuzz said. My boss has a motorhome and he tows his F350 ford pickup with no worries about fuel economy....welcome to California.
beanstorm, Feb 06 2006

       The only, questionable, advantage I can see is that you would be doing more of that noisy polluting internal combustion stuff on the open road and less at your destinations. The overall fuel consumption would be greater, due to all the energy conversion losses and the need to tow the electric car's batteries, than just towing an internal combustion car.
Do people still actually still do this, in these latter days of the fossil fuel orgy? Those who see them should laugh them to scorn.
spidermother, Feb 06 2006


back: main index

business  computer  culture  fashion  food  halfbakery  home  other  product  public  science  sport  vehicle