Cylinder block for an internal combustion engine

Details Cylinder block for an internal combustion engine Cylinder block for an internal combustion engine

1994-04-28

1995-12-12

Kamen, Noah P.

Internal-combustion engines

Frame construction

Horizontal cylinder

123 4174, 1231932, F02F 700

Patent

active

054740401

ABSTRACT:
A cylinder block for an internal combustion engine includes a bolt boss located between cylinders, the bolt boss being connected to a common wall portion of a siamese bore wall structure by a double bridge structure including a lower bridge and an upper bridge located above the lower bridge. Since a composite moment E.sub.0 acting on the bolt boss during the tightening of a head bolt is directed in a plane including the common wall portion, the composite moment can be born by the common wall portion which has a very large rigidity in a direction perpendicular to the row of cylinder bores. As a result, deformation of the bolt boss is suppressed, and deformation of the cylinder bore and inclination of the top deck are also effectively suppressed.

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