Water jacket spacer

Abstract

A water jacket spacer has a spacer body molded in conformity to the shape of the water jacket and a regulating member whose one side is fixed to the spacer body. The regulating member is composed of a first member which is not water-swellable and is elastically deformable and a second member made of water-swellable elastomer which is integrally fixed to the first member. The regulating member lies in a state not-contacting an opposed wall of the water jacket when inserted into the water jacket together with the spacer body, whereas it blocks a part of cooling water flowing through the water jacket by deforming such that a side of the regulating member not fixed to the spacer body faces toward the opposed wall of the water jacket when the second member swells by absorbing cooling water flown into the water jacket and thereby the first member is elastically deformed.

Description

technical field [0001] The present invention relates to a water jacket liner embedded in a water jacket of a cylinder block for adjusting the flow capacity of cooling water in the water jacket. Background technique [0002] There are open channel type and closed channel type in the cooling structure of the cylinder block in the internal combustion engine, especially the water-cooled engine, through the water jacket. The cooling structure of the open channel type is formed by forming an annular water jacket with an open upper end such as an oblong shape in plan view or a substantially oblong shape with a constricted neck around the cylinder bore of the cylinder block, so that the cooling water flows and circulates to the coupling. The cylinder head and the upper end are enclosed in a water jacket to cool the engine block. [0003] Generally, the cylinder block is manufactured by casting aluminum alloy or the like. Casting is carried out by filling casting material into a mo...

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