This is a Mercedes cylinder head with 4 valves. One valve had to be cutaway in order to show the injection valve and the spark plug..
The following can be shown:
- Function of the 3 remaining valves
- Function of the hydraulic valve tappet
- Function on inlet and outlet channels
- Function of the cutaway GDI injector with Teflon ring (bottom, on the nozzle body), nozzle module, piezo-actor module, coupler module, fuel intake (high pressure), O-ring (leakage line) and electrical connection.