Patent ID: 9334828
Filing Date: 2016-05-10
CPC Classification: F02F

Claim Text:
1. An internal combustion engine comprising: a cylinder block having a deck face defining first and second cylinders adjacent to one another, and a block cooling jacket; and a cylinder head having a deck face defining first and second chambers adjacent to one another, the cylinder head defining a first head cooling jacket and a second head cooling jacket configured to operate at a lower pressure than the first head cooling jacket, a majority of the first head cooling jacket positioned between the head deck face and the second head cooling jacket; wherein the first chamber and the first cylinder form a first combustion chamber, and the second chamber and the second cylinder form a second combustion chamber, the first and second combustion chambers separated by a bore bridge; wherein the block cooling jacket has an outlet passage intersecting the block deck face on a first side of the bore bridge; wherein the second head cooling jacket has an inlet passage intersecting the head deck face on a second side of the bore bridge, the inlet passage of the second head jacket being surrounded within the cylinder head by a cooling passage of the first head jacket, the cooling passage of the first head jacket forming a sleeve around the inlet passage of the second head jacket such that the inlet passage of the second head jacket is encircled by the cooling passage of the first cooling jacket in a region of the cylinder head between the head deck face and the second cooling jacket; and wherein coolant flows from the outlet passage along at least one of the block deck face and head deck face and to the inlet passage to cool the bore bridge.