Controlled flow cooling system for engine head for low...

Details Controlled flow cooling system for engine head for low... Controlled flow cooling system for engine head for low...

F - Mech Eng,Light,Heat,Weapons

02

F

123/249

F02F 1/40 (2006.01)

Patent

CA 1094417

CONTROLLED FLOW COOLING SYSTEM FOR ENGINE HEAD FOR LOW WEIGHT RECIPROCATING ENGINE ABSTRACT OF THE DISCLOSURE 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 straight longitudinally drilled passage, which may include one or more of such passages, is located in the head separating the exhaust and metal valve guides; the passage has a throat area equal to or less than the throat area of either of the grooves in the head. Heat extraction is more easily and flexibly programmed to achieve not only a more uniform wall temperature throughout the head and block, but permit a desirably slightly higher average wall temperature than conventional light metal heads for improvement in fuel economy and thermal efficiency.

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