Patent ID: 7143754

Claim:
A device comprising a cylinder head and a cylinder head cover, for mounting onto an engine block of an internal combustion engine, the cylinder head comprising an upper chamber, a camshaft housing, an oil core, and perforations, wherein the perforations are in a part of the cylinder head separating the oil core from the camshaft housing, the cylinder head cover comprising a passageway, a cylinder head cover chamber lined with alternately opposing walls defining baffles, a bottom wall having openings, and a collection chamber at an upper part of the cylinder head cover, wherein the cylinder head and the cylinder head cover have, integrated within them, first passages arranged to allow waste gases loaded with oil, the waste gases resulting from combustion and compression, to circulate up to the upper chamber of the cylinder head wherein the gases are partially de-oiled by settling, to provide settled oil that re-descends into the oil core through the perforations of the cylinder head, the passageway in the cylinder head cover being arranged to allow the circulation of the partially de-oiled gas from the upper chamber of the cylinder head through the cylinder head cover chamber comprising the baffles, until the gas is completely de-oiled by settling, to provide settled oil depositing on the bottom wall of the cylinder head cover chamber, downstream of the baffles, the settled oil passing through the openings of the bottom wall and into the upper chamber of the cylinder head, and the de-oiled gas passing into the collection chamber of the cylinder head cover, and wherein the cylinder head and cylinder head cover have a set of ducts arranged to allow de-oiled gases to be routed from the collection chamber of the cylinder head cover to the site of an intake valve mounted in the cylinder head.