Originally Posted by Florida_GATOR Who cares about MPG anyway? we are driving sports cars...not prius sedans. I drove a tank called a H1 and i got 5mpg on diesel but
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07-23-2009, 08:52 AM | #16 (permalink) | |
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Why the hate on efficiency and power? If you can have both, embrace it. I will. Too bad the FT-HS never made or the Alessandro Volta. |
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07-23-2009, 09:10 AM | #18 (permalink) |
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There's no hate on either, im just saying trying to make somethings, not everything, green could damage its image. Imagine a badass sports car like the Z having a super quiet electric motor and reduced power to save on emissions...just seems like the two wouldn't work together.
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07-23-2009, 09:35 AM | #19 (permalink) |
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I'm still not a fan of hybrid technology. It's an inefficient, wasteful design compared to an all-electric with a generator for extended range.
The correct design for an all-electric is: 4 electric motors, one in each wheel as an integral part of the hub/wheel, a sizable battery system that's capable, and a very advanced ECU to control the 4 motors and the charging system. There's no gearing and no drivetrain losses in such a setup. You get instant torque from 0rpm at all wheels. Top speed is limited by max engine RPM, but is usually sufficient (120 mph or higher, at the least). You also don't need conventional brakes, as the ECU can reverse current flow to the engines for torque braking that's more powerful than conventional brakes anyways (although I'm sure they'll have to add some kind of mechanical e-brake for power failure scenarios), and you get regenerative braking with that to help battery range. Prototypes of these designs have already been built by multiple smaller companies. Since the ECU can control individual torque at all 4 wheels (both negative (braking) and positive (accel)), it's also possible in software to replace all the functions of "limited slip", "ABS", "traction control", etc with much more advanced and precise variants. They get acceleration times that blow the doors off of just about anything. The only issue is usually the allowable travelling range on a battery pack of reasonable weight. The solution? A tiny (we're talking lawn-mower-sized) 2-cycle gasoline or diesel engine in the trunk, which runs at a fixed RPM very efficiently powering a small generator to keep the batteries topped off. For extended trips, you just gas up the small tank on the generator, and it's still vastly more fuel/power-efficient for the long-haul than any conventional or hybrid. Why automakers continue dragging their feet with this "hybrid" drivetrain stuff, I don't know. Both the tree-huggers and the racers win with an all-electric design. The few that have been hand-built have been very expensive (the batteries and the motors being the huge expense obviously), but if a major auto manufacturer did this they would achieve much better economies of scale and drive the component prices down. |
07-23-2009, 09:39 AM | #20 (permalink) |
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07-23-2009, 10:32 AM | #21 (permalink) |
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Great post wstar!
One reason they have not done this is the retooling costs. They are setup to make the types of vehicles they make. They don't want to spend the money, and have the downtime to retool the factories, and retrain the workers. Not to mention training technicians for repair. IMHO, they should have used the bailout money for this. |
07-23-2009, 10:54 AM | #22 (permalink) | |
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07-23-2009, 10:56 AM | #23 (permalink) |
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none, they would reduce power from the sports car to make it less harmfull to the earth.
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07-23-2009, 02:12 PM | #24 (permalink) |
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HAR!..
when i was a wee bitty fellar.. some of us were into slot cars.. you'd buy em and go to these slot car tracks and race em.. the true gurus of that world did things like taking their itty bitty motors out and rewinding the coils to pull more power somehow.. i think it actually would suck power into their cars and reduce power to others.. dunno though.. hotrodding electric motors will be cool.. perhaps cooler than hydro-carbon based engines... imagine dropping a locomotive electric motor into a volkswagon and showing up a the local track.... |
07-23-2009, 02:58 PM | #25 (permalink) |
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The FT-HS is still under development and should debut some time next year as a 2011 model year.
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07-23-2009, 03:37 PM | #26 (permalink) |
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WStar the four wheel/motor system is going to be a huge leap in how the car handles as well. There is no need for a differential you can program LSD however you want it to react - its going to give unbelievable handling characteristics.
As for our love or hate for hybrids they are going to be here regardless. Its the step consumers need to take going from gas to electric - its part of the psychology of changing technologies. Its the same reason your DVD player is backwards compatible with your CD player, etc. We don't like change even if its for the better so Hybrids are part of the transition. Full electric will be outstanding and with battery technologies changing as rapidly as they have been the future isn't far off. An electric motor will eat any gas motor - its just a matter of time before we can carry enough electrons in our cars to make this possible.
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07-23-2009, 03:39 PM | #27 (permalink) | |
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Hot rodding electric motors is already huge with the R/C guys and the new brushless technology its the software in the speed controller that is making huge leaps in performance including software timing advance, etc...
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07-23-2009, 06:38 PM | #28 (permalink) | |
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I work for several automakers as a supplier, and I do not see any of them "dragging their feet" on all-electric design. The limitations of current battery tech are very real. Did you happen to see the Business Week article on problems with li-on battery packs catching fire? It only takes a single bad cell to start a chain reaction and the best batteries today use hundreds of them. Power grid issues are pretty significant as well. Today's all-electric prototype cars require at least 230VAC service, and would benefit from even higher voltage to shorten charge times to under 4 hours. But in many parts of the U.S. the power grid is struggling to satisfy domestic and industrial demand. Here in the Northeast we are constantly challenged with brownouts and power blips. Adding a few million all-electric cars to this equation will cause many of these systems to fail catastrophically. There are great strides being taken on developing electric motors with better characteristics for automotive use, higher efficiency, better long-term reliability, etc. But until the battery and grid issues are solved, I think we're a ways from being able to take advantage of the technology. Just my $.02 HJM |
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07-24-2009, 12:29 AM | #29 (permalink) | |
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I would be shocked (no pun intended) if you don't have 240VAC in your house. Regardless its not the voltage that will reduce charge times - any voltage can be converted to whatever the battery arrangement is. Higher voltage makes more sense because smaller wires are required to carry the same power. As for the power grid there is so much energy on earth that is untapped.... but that's another long debate. Lets harness some of the wind power, etc. Its a matter of capital investment, etc and until the demand is there the investments won't be made. If we told you 20 years ago our power demands would be what they are today everyone would say impossible yet here we are....
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