I see another article about electric vehicles...and primarily about plug-in hybrids. And somehow the electric power grid has been replaced entirely with green energy and demand for exported coal is ignored.
Of course I'm considering global warming rather then local or regional pollution...
But the idea IS elegant. The vehicle is plugged in overnight and then will drive for 40 miles before the internal combustion engine takes over. Then the metro commute is cleaner. (But again most of the plug-in electricity is produced by burning coal and the elegance is lost.) (And if we could avoid burning coal then the coal we don't burn is exported to be burned elsewhere.)
Now consider the most successful currently available all electric vehicle...the Tesla. That car costs $109,000, has two seats, and has a range of 220 miles. Now that car is successful both because it is a small car and because it is a car based on lightweight technology. Then the lightweight car with the batteries added becomes a car of average weight for its size.
Next consider the traditional hybrid vehicle. That vehicle depends on braking of the vehicle to charge the batteries. So that's a vehicle strategy that seeks to avoid lightweight technology. It accepts good charging action in exchange for less than possible efficiency when being driven by the internal combustion engine. Then the plug-in hybrid if its hybrid function is only plug-in...could use lightweight technology in the same way that the totally electric vehicle can !
But now realize that internal combustion engine vehicles can benefit from lightweight technology...in an astounding way. The car could be the size of a Altima, weigh 2200 pounds, use a 2.0 four-cyclinder engine as the premium engine, get 22/32 MPG, and maintain performance standards. Or the car could be the size of a Civic, weigh 1500 pounds, use a 1.0 three-cyclinder engine, get 35/50 MPG , and maintain performance standards.
But what is lightweight vehicle technology ? Well the frame and bodywork are separate, the frame is strong but pinpoint in fucntion and looks like a power transmission tower laid on its side, while the bodywork is lightweight and flexible but supported by the frame. Well the bodywork is very lightweight because the frame makes both lower an upper attachment points. And a bodywork of Lexan or Fiberglass or Royalex has good insulation properties.
However our current lightweight vehicle technologies work like a 2X4 laid laid across a ditch. With the 2X4 on its side it's bouncy but with the 2x4 laid on its edge its rigid. So the vehicle has two lower frame channels (hollow) turned up on edge. Then a fiberglass bodywork is attached to a frame that provides mostly lower bodywork attachments. And so the fiberglass bodywork is itself mostly rigid and not as lightweight as possible. (Okay the Corvette has a separate frame and bodywork and a fiberglass bodywork, the Elise has a separate frame and bodywork and a fiberglass bodywork, while the Solstice has a separate frame and bodywork but a steel bodywork.)
But the internal combustion engine in a lightweight vehicle is a good solution and a currently possible technology. Realize that the internal combustion engine has four valve heads (for less waste during the opening and closing of valves), electronic direct fuel injection, and mechanical variable valve timing. In other words don't throw away the internal combustion engine just as it gets very good...but put internal combustion engines in lightweight vehicles and use smaller engines.