Fuel Injection System Working Explanation

I need a clear, technically accurate breakdown of how the fuel injection system functions inside a modern internal-combustion engine. The spotlight is strictly on this component set—pump, injectors, rail,... (Budget: ₹12500 - ₹37500 INR, Jobs: AutoCAD, Automotive Engineering, CAD/CAM, Engineering Drawing, English (US) Translator, Illustration, Solidworks, Technical Writing)