I’ve always wondered what the fascination with battery technology is, when the proven technology used by trolleys and streetcars for over 120 years is electricity via rail or wire. There are no limitations on range or power delivered electrified lines, and use avoid the inefficiency of power stored in a battery.

I could envision the car of a future being a gasoline engine with complete cylinder deactivation, where the complete engine is shut off by a solenoid disconnecting the rocker arms controlling the valves ala the Active Fuel Management widely used in General Motors pickup trucks today.

On major highways and other high traffic roads where “electric wires” are available, as sensed by a radio signal, the car would automatically pop up trolley poles through the roof like a power radio antenna. Electric consumption and billing information would be transmitted through a signal in the wire to the billing municipality, public authority, or power company.

An electric motor/generator in the transmission of the car would spin the drive train and engine, including pushing up and down engine pistons (using the exhaust in the cylinders and shut valves as a choosen) and flywheel. When braking or going downhill, the motor acting as a generator would put recovered power back into the electric line.

The nice thing about this system is there is no range or weight limitation, and uses existing technologies. You could power even semi-trucks or buses with this technology. Moreover, if you become disconnected temporarily from the electric line, the motion of engine’s pistons decompressing the exhaust left in the cylinders and the standard flywheel, would keep the car coasting until electricity came back or the solenoids reconnected the push-rods to the rocker arm and started feeding the engine gasoline once again (the later could happen basically instantly if there is such a power demand).

Because your still moving the pistons up and end down and compressing waste gases, the engine never gets cold, always has warm coolant to heat the inside of the car, and is always ready to burn gasoline at proper operating temperature whenever electricity is dropped.

I can not imagine a future where cars don’t have at least some kind of internal combustion engine that burns gasoline or diesel, at least part of the time. We have been refining Internal Combustion Engines for 110 years now, and the technology is so well engineered and reliable, that it seems likely that cars will use Internal Combustion Technology of some sort for at least another 110 years, if not longer. Internal Combustion Engines are only going to be come cleaner and less polluting as pollution control standards and technology improves, and they are only going to burn less gas or diesel in decades to come.