Hey everybody. I thought I'd share with you some musings I've been having lately on the evolution of the car, and how the automobile could be improved. My personal philosophy is highly environmentally conscious, and I try to dedicate myself to living in as wise and sustainable a way as possible. Now, I'm ALSO a car geek, so naturally the two collide and leave me wondering how to make the automobile as efficient as possible. I thought at least some of you might be interested. I think this concept is pretty viable, especially in a future that I believe will be defined by rising fuel prices as demand begins to catch up to supply. Basically, it's a hybrid. The Toyota Prius is a credible stab at the idea, but it's nowhere near what it could be. So here's my idea. If you need more info on the various technologies, ask me.- The bodystyle would be something very similar to the Vibe, only lower drag. A nice smooth profile would cut drag to around .20 or .22, which is respectable. The body itself would, most realistically, be an aluminum spaceframe. This is already in production in the Audi A2 and A8. This type of construction uses extruded aluminum beams linked together like a skeleton. It looks sort of like a "birdcage" race car body. Body panels would be composite plastic, like Saturn- light weight, no dents, no painting. The advantage is 1/3 weight savings. For even lighter weight and higher efficiency, use carbon fiber for all or part of the spaceframe. Maybe some sort of composite plasic for doors, hood, and hatch. - Power would be supplied by a small, highly advanced rotary engine. The advantage here would be light weight. I'd use a Russian refinement of the standard Wankel rotary that is as clean and efficient as a piston engine. Look up "Wankel engine" on google for how this type of engine works. The engine would crank out no more than 30hp (probably closer to 20hp) and be roughly the size of a coffee pot. It would burn compressed natural gas or propane. Or perhaps alcohol.- Huh? you say. That's not enough to power a car! It'd be a slug! Nope, I reply. That rotary engine is hooked up to a flywheel generator. The engine only runs for about 2 minutes out of 12. It exists solely to spin up to speed a heavy carbon-fiber cylinder. This cylinder is lined with magnets and spins around a wire-wrapped stationary core. It's inside a vacuum chamber that reduces friction, and it generates power using the heavy wheel's momentum. Every so often, the wheel is kicked up to speed again by the engine. The rest of the time, the flywheel stores power in its momentum and generates power off of that. Advantage: the engine runs very seldom, and can be run at its most efficient RPM when it does run. Maybe there's a capacitor bank to store electricity for passing or mountain driving. Engine + generator= about the size of a small trash can. Maybe two feet long, 9 or 10 inches wide at the absolute most. - This power is fed to compact, efifcient electric motors in the wheels of the car. No transmission, no diffs, no driveshafts to gobble up power with friction losses. Electric motors create 100% of their power at any RPM range, so all that's required is modulating the amount of power the motor gets. In-hub, the motor has maximum efficiiency. Go to
http://www.e-traction.com for more info. Alternative technology: An new Japanese development may, if valid, lead to electric motors 80% more efficient than existing ones, and would be perfectly suited to this application. This would allow the engine and flywheel generator to be even tinier. Brakes would be regenerative, feeding power into a small battery for EVEN MORE efficiency. - Depending on your desires, the car could be rear-wheel drive, front-wheel drive, or 4wd. Maybe 2wd for efficiency in the summer, and swap in 2 extra (rented?) motor wheels for traction in the winter? Rear-wheel for sporty driving, if you want. That's the meat of it. I suspect, engineered right, this sucker could be getting well over 100-120mpg, or the natural gas equivalent. Maybe even more; I'm just guessing. It would also be incredibly roomy inside for its exterior size. Electric motors' high torque would give it incredible off-the-line performance and pickup. How is this possible? Through a lightweight body, and avoiding the power losses of drivetrain and big, clunky internal combustion engines that rarely run at their most efficient. Plus, a high-energy alternative clean fuel for tailpipe emissions cleaner than the air you're breathing right now. The idea could be extended to small economy cars (200 mpg), minivans, SUV's, you name it. The bigger the vehicle, the less efficient you can be, but you could still probably get a good 60-70mpg from a midsize SUV. I think it's an idea whose time has come. So why the hell isn't this being pursued seriously, instead of impractical hydrogen cars and fuel cells? It could be made with technology that exists right now, without needing expensive new infrastructure and energy sources. It could run on regular gas just as easy as anything else. Pontiac: BUILD THE SUCKER! (Probably not, but I can hope.)