Controlled flow cooling system for engine head for low weight reciprocating engine

Abstract From the Canadian patent

A light metal die-cast head employs a low volume cooling system which eliminates the conventional intricate water jacket and replaces it with continuous grooves which wrap hemi-cylindrically about each combustion cylinder in a thinly spaced relation. The grooves are exposed along their length at the deck surface of the head. There is a critically located straight drilled passage along with two such grooves in the head, the combination of which is restricted in throat area when compared to the throat area of similar grooves in a cast iron engine block. This results in a high velocity flow in the head and a low velocity flow in the block when they are connected in series flow relation. The …