Bore bridge cooling passage

摘要

A tool and a method of using the tool are provided for forming an engine component. The engine has a block defining a first cylinder and a second cylinder spaced apart by a bore bridge. The bore bridge defines a first cooling passage spaced apart from a deck face and extending transversely, and a second cooling passage positioned between the first passage and the deck face and extending transversely. The first and second passages are formed by a casting skin. In forming the engine component, a die is provided that defines a locator recess and at least one core. An insert is positioned into the recess on the die. The insert has a cast shell surrounding a lost core. The component is die cast with the die and the insert to form a cooling jacket. The insert is adapted to form the cooling passages for the bore bridge.

主权项

1. A tool for forming an engine component comprising:
a die having a support member defining first and second locator recesses positioned between first and second cores adapted to form a cylinder cooling jacket; and an insert having a lost core center generally encapsulated by a die cast aluminum shell, the insert having first and second locator protrusions sized to be received by the first and second locator recesses respectively, the insert adapted to form a cooling passage for a bore bridge of the engine component between adjacent cylinders; wherein the insert has a first post and a second post spaced apart from the first post, a first rail extending from an end of the first post to an end of the second post, and a second rail extending from an intermediate region of the first post to an intermediate region of the second post, wherein the first locator protrusion extends from another end of the first post, and the second locator protrusion extends from another end of the second post, wherein a diameter of each locator protrusion is greater than a diameter of an associated post.