crankcase ventilation system

[silver343124]

I found some usefull scheme of a PCV system for throttled engine;

I did't manage to find scheme for a turbocharged engine, so the question is;
where is a pipe that brings fresh air to the crankcase attached to the main air pipe - after or before air compressor?

Another question is about PCV system on an unthrottled (diesel) engines. As I can understand air is circling the crankcase because of a pressure difference before and after throttle plate. But on diesel engine there is no throttle plate, so how do you get air circling?
I only found something about CDR (Crankcase Depression Regulator) valve.
So anywhone has any knowledge about diesel PCV and can show me some scheme?