Patent ID: 7021250

Claim:
A cooling structure for an internal combustion engine having an engine block including a plurality of cylinder walls defining a plurality of combustion chambers, each of the combustion chambers having an upper end and a lower end, wherein a fuel-air combination is introduced into the upper end of each combustion chamber for combustion, the cooling structure comprising: a plurality of coolant channels including an upper coolant channel and a lower coolant channel abutting an outer surface of the cylinder walls and fluidly connecting a coolant inlet and a coolant outlet; and a dividing wall extending between the lower coolant channel from the upper coolant channel and defining a crossover channel fluidly connecting the lower coolant channel and the upper coolant channel, wherein the coolant inlet is directly fluidly connected with one of the lower coolant channel and the upper coolant channel and the coolant outlet is directly fluidly connected with the other of the lower coolant channel and the upper coolant channel.