BMW S58, Руководство пользователя

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S58�Engine
4.�Engine�Mechanical
20
The�blow-by�gases�pass�through�the�opening�in�the�area�of�no.�6-cylinder�into�the�settling�chamber
in�the�cylinder�head�cover.�From�the�settling�chamber,�the�blow-by�gases�pass�through�the�particle
separator�with�ball�valve�where�they�are�separated�from�the�oil�by�an�artificial-felt�element.�The�blow-
by�gases�separated�from�the�oil�next�pass�either�through�the�crankcase�vent�valve�via�the�cylinder�head
into�the�intake�area�upstream�of�the�intake�valves�or�to�the�intake�area�upstream�of�the�turbocharger,
depending�on�the�engine�operating�mode.�The�separated�oil�is�directed�via�a�return�duct�discharging
into�the�sump�below�the�oil�level.�A�non-return�valve�in�the�lower�part�of�the�crankcase�in�the�area�of�the
sump�ensures�that�no�oil�from�the�sump�can�pass�into�the�crankcase�ventilation�system�from�the�sump.
The�precise�procedure�for�removing�and�installing�the�cylinder�head�cover�can�be�found�in�the�up-to-
date�information�in�the�BMW�workshop�system�ISTA.
Operating�principle
The�standard�function�can�only�be�utilized�while�there�is�a�vacuum�in�the�intake�plenum,�i.e.�in�naturally
aspirated�mode.
In�naturally�aspirated�mode,�the�crankcase�vent�valve�and�the�ball�valve�in�the�particle�separator�in�the
cylinder�head�cover�are�opened�by�the�vacuum�in�the�intake�plenum.�The�blow-by�gases�are�routed�via
the�distributor�rail�integrated�in�the�cylinder�head�cover�directly�into�the�cylinder�head�intake�ports.