Patent ID: 6647944
Filing Date: 2003-11-18
Classification: F02F

Abstract:
A cylinder block structure, comprising:a crank case; said crank case being disposed on a first lower surface of a V-type cylinder block; a first set of bearing caps mounted on said crank case; said cylinder block and said first set of bearing caps operably supporting a crank shaft along a center axis of said cylinder block structure; said crank shaft transmitting a distorting horizontal force to at least said first set and a one-side wall of said crank case during an engine operation; means for preventing a distortion of said at least first set and said one-side wall during said engine operation; at least a bulge portion in said means for preventing; and said bulge portion extending away from at least said one-side wall and reinforcing said first set and said one-side wall, whereby said means for preventing resists said distorting horizontal force and prevents said distortion.