FLANGE PART STRUCTURE OF CRANK CASE LOWER SURFACE

摘要

PROBLEM TO BE SOLVED: To provide a flange part structure of a crank case lower surface having reducing effect against vibration in a left and right direction and an upper and lower direction by increasing stiffness of the flange part of the crank case lower surface. SOLUTION: In a structure of the flange part 3 of the crank case lower surface formed on the lower surface of the crank case 1 and having an attachment flange part 5a formed on an upper surface circumference part of an oil pan 5 attached thereon, the flange part 3 is formed in a cylinder shape along a longitudinal direction at a lower part of the both side walls 2a of the crank case 1 and the lower surface 3a' is used as an attachment surface with the attachment flange part 5a of the oil pan 5. COPYRIGHT: (C)2006,JPO&NCIPI