Volt regulator for in the car to run a rasperry pi
If you plan to use a LM317 (according to the schematic) it will fry in a second. As you can see on the datasheet, it's recommended to not draw over 1.5Amp.



So this chip doesn't fit your need.

If the system draw more than 5A, you will face some heat problem if you use linear regulator. Hopefully, there is an alternative : Switching power supply / regulator. These king of regulator are a way more efficient (except for low current consomption) than linear regulator. It's also harder to design but you will find a lot of topic here on EE.



Edit

Once you will have acquire some knowledge about switch regulator, you can take a look at TI power supply website. It's a pretty easy way to design what you need.

I'm sure other manufacturer provide same interface, but this one is very clear. (especially for a EE beginner)