How would I become a vehicle tech inventor?

I think I've got what it takes to become one of those guys that wears a lab suit and creates ideas for cars and what not & recently came up with a few inventions, drew them out and wrote descriptions of their operation and purpose etc but I'm reluctant to just crop up to a major car manufacturer and go here I've got some bright ideas for you seeing as manufacturers such as honda seem to think that if they like an idea which is offered to them then they mysteriously thought of it before you brought it to them. But with no evidence… How would I become a vehicle tech inventor?

Invent something.

Study automotive engineering or industrial design (depending on what end of the process you want to work on).

Get a degree in vehicle design or no one will take you seriously. Dreamers are ten a penny.

Invent something!

Learn engineering

"crop up to" is not a sensible expression.

ideas for cars and what not?

If you were such a person, you would already be working with cars and be so familiar with cars that you saw their weak and strong points.

I was such a person long ago, and I fit into such a program. Then I found out that the program did not really follow what it seemingly was created for.

I've developed into a safety nut, and you wouldn't believe how great the opposition was to something (a safety innovation) that cost six tenths of a cent (per car) to implement on all the cars of a model year.