Patent ID: 8875670
Filing Date: 2014-11-04
Classification: F01N,F01P,F02B,F02F

Abstract:
1. A cylinder head for an engine comprising: an exhaust manifold coupled to a plurality of exhaust runners, the exhaust manifold including an exhaust manifold opening; an upper cooling jacket at least partially surrounding one or more exhaust ports and exhaust runners, the upper cooling jacket including at least a first inlet and a first outlet; a lower cooling jacket at least partially surrounding the one or more exhaust ports and exhaust runners, the lower cooling jacket including at least a second inlet and a second outlet; a set of crossover coolant passages fluidly coupled between the upper cooling jacket and the lower cooling jacket, the set of crossover coolant passages spaced away from the exhaust manifold and adjacent to a periphery of the cylinder head; and at least an additional set of crossover coolant passages adjacent the exhaust manifold, wherein flow of the additional set of crossover coolant passages is both directed and restricted by cups.