In terms of the reality of the business world you have to either pitch the technology (explain your concept) to private individuals that would be willing to invest in shares of your corporation, and/or you'll need to seek investment capital from the venture capitalists, in that case you
must prepare a business plan to present to them. If you really are sure of the concept and have the ability to demonstrate it on a small scale that's also a necessary component that will be asked of you if they consider your proposal, so be prepared to build a device that demonstrates the principle behind the technology that would power the car.
There are a few engineers and various other knowlegable people here that may be able to help you with the design of such a device, but of course that would mean introducing us to the concept.
