electric cars,vehicles.

i have an idea for electric cars,but have no idea if i can protect or copyright the idea,or who to talk to who might be able to use the idea, IF they think it is a good idea .personally i dont think it has been used yet and if not i think it has potetial.
id be pleased to hear from people who might have suggedtions. at the moment i would rather not post the idea in a public forum.
thanks markus.