Recharging Plug Ins | |||||||||||||||||
ok guys, I'm not an engineer, but here's my idea. I've always wondered why no one has figured out a way to get more "mileage" out of plug in electric cars. These currently seem to have a range of about 40 miles from what I've read. Most car companies today seem to be making more attempts at the hybrid where batteries support a normal size engine. Makes sense to some level b/c gas engines waste a lot idling in traffic, etc. But why not turn things around and make an engine that supports the batteries. Can't modern day generators create enough charge to give plug in car batteries the "juice" they need? My in-laws RV has a diesel generator in it that uses 1/2 gallon per hour, and it runs t.v.'s, refrig/freezer, lights, microwave, etc. What if a small diesel or propane generator was put under the hood of these new plug in electric cars. Then as you ran down the road, the generator could replace the power used up by the batteries and keep them charged. At 1/2 gallon per hour, driving 60 mph, wouldn't that be like getting 120 miles per gallon?
jmmck, Aug 04 2008
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It sounds like you are trying to reinvent the plug-in electric hybrid.
Sounds like you've just described the 'series hybrid', a known technology.
http://en.wikipedia.org/wiki/Hybrid_vehicle_drivetrain
Ferdinand Porsche designed one of these in 1901.
http://en.wikipedia.org/wiki/Lohner-Porsche_Mixte_Hybrid
They're good for efficiency, but you end up having to get all of your power from the electric motor(s)--which means that you won't be satisfied with 33 hp, like a Prius (which also has a 70 hp gas engine). Electric motors of the 100 hp variety (75,000 watts?) are pretty uncommon and usually high-voltage. I havn't seen them in many cars. I believe the all electric Tesla has much higher horsepower--it's listed at 248HP. Also, it goes 220 miles on a charge. But it's $$$.
http://en.wikipedia.org/wiki/Tesla_Roadster
Your friend's diesel generator probably supplies less than 5000 watts. Don't think that would move a car very well.