Cylinder-head of an internal combustion engine with two intake valves for each cylinder

Claim 1

A cylinder head of an internal combustion engine having two intake valves for each cylinder adjoining each other and arranged eccentrically in relation to the cylinder axis, the first of the two intake valves being arranged at least approximately in a longitudinal median plane of the internal combustion engine, the second intake valve being offset by approximately 90* towards the suction-end sidewall of the cylinder head in relation to the first intake valve, a first inlet duct extending from said cylinder head sidewall in transverse relation thereto to the first intake valve, a second inlet duct extending from said cylinder head sidewall to the second intake valve and having a convex curvature in relation to the cylinder axis, each said inlet duct comprising a spiral-like section wound around the axis of the associated intake valve and inclined towards the valve, whose sense of winding is identical for both inlet ducts, each inlet duct extending at the point of transition to the spirallike section laterally outside the associated intake valve in relation to the cylinder axis and extending at the latter point in an approximately tangential relation to the inner wall of the associated cylinder.