The Chevy Volt was originally kinda-sorta along the lines of what you proposed.
E.g. http://www.plugincars.com/exclusive-video-want-know-exactly-how-chevy-volt-powertrain-works-95344.html (with videos).
There are lots and lots of compromises in making an electric car. I wouldn't be surprised if packaging was one of the reasons why they don't put a motor near each wheel. Reliability and maintenance might be better/easier with a single motor and drive shafts, etc., to the relevant pair(s) of wheels, also too.
Crash test results might be a constraint, too (having lots of mass near the center of the car, rather than at each wheel).
Just a guess.
HTH a little.
Cheers,
Scott.
There are lots and lots of compromises in making an electric car. I wouldn't be surprised if packaging was one of the reasons why they don't put a motor near each wheel. Reliability and maintenance might be better/easier with a single motor and drive shafts, etc., to the relevant pair(s) of wheels, also too.
Crash test results might be a constraint, too (having lots of mass near the center of the car, rather than at each wheel).
Just a guess.
HTH a little.
Cheers,
Scott.