Patent ID: 7594501

Claim:
A cylinder head cover for an internal combustion engine, comprising: an oil separator with a vortex chamber extending in a longitudinal direction from a proximal end to a distal end, said vortex chamber comprising: a plurality of parallel sub-chambers each comprising an essentially pipe-shaped wall extending in said longitudinal direction, a gas inlet common to said sub-chambers arranged at said proximal end of said vortex chamber and oriented tangentially to each of said essentially pipe-shaped walls, for tangentially blowing blow-by gas into said sub-chambers, such that a gas vortex flow helically rotating along said essentially pipe-shaped wall in the longitudinal direction from said proximal end to said distal end of said vortex chamber is created in each of said sub-chambers, and at least one gas outlet opening, wherein said gas outlet opening is arranged in the region of said distal end of said vortex chamber.