Patent ID: 7086357
Filing Date: 2006-08-08
Classification: F01P,F02F

Abstract:
1. In a diesel engine cylinder head comprising: a sidewall; a coolant jacket within said sidewall; a fire-face wall having an inner fire-face wall surface, said fire-face wall having a periphery connected to said sidewall; a chamber wall extending generally parallel to said fire-face wall in substantially spaced relation thereto, said spacing being substantially 0.89 inches, said chamber wall having an inner chamber wall surface facing said inner fire-face wall surface, said fire-face wall and said chamber wall collectively dividing said coolant jacket into a lower jacket chamber and an upper jacket chamber; a plurality of exhaust port wall portions extending through said coolant receiving jacket and embracing a portion of said fire-face wall, each exhaust port wall portion of said plurality of exhaust port wall portions defining a respective valve controllable exhaust port opening through said fire-face wall; a plurality of stud bosses located adjacent said sidewall and in spaced relation with respect to said plurality of exhaust port wall portions; a plurality of partition walls in said lower jacket chamber, one partition wall for each exhaust port wall portion, wherein each partition wall extends outwardly in substantially tangent relation from its respective exhaust port wall portion and connects with a respective stud boss; a plurality of coolant inlet ports formed in said fire-face wall and opening into said lower jacket chamber adjacent a periphery thereof; a plurality of coolant by-pass ports formed in said chamber wall fluidically connecting said lower jacket chamber to said upper jacket, said by-pass ports having a cross-section of substantially 0.25 inches; a plurality of densely packed spines located at said inner fire-face wall surface substantially adjacent said plurality of exhaust port wall portions, wherein the spines have a density of substantially 9.8 spines per square inch; and a radial rib connected with said fire-face wall and said sidewall, said rib having a rib opening formed therein; wherein an improvement thereto comprises: a coolant by-pass opening formed in each partition wall adjacent its respective exhaust port wall portion; a spine density of substantially less than five spines per square inch; spacing said inner chamber wall surface with respect to said inner fire-face wall surface substantially between 0.75 inches and 0.25 inches; said by-pass ports having a cross-section of substantially between 0.1875 inches and 0.0625 inches; and said radial rib extending complete and free of said rib opening.