CRANKCASE OF PISTON INTERNAL COMBUSTION ENGINE Russian patent published in 2002 - IPC

FIELD: mechanical engineering. SUBSTANCE: crankcase of piston internal combustion engine has main bearing split supports, each being formed by intercylinder partition limited from below by plane of mating with sump and cover installed in seat with interference over side planes. Slots or projections with vertical side walls are made in lower part of each partition on plane of mating with sump at both sides of cover. Lower outer surface of cover is made in form of horizontal plane to which yoke with side projections adjoins. Cover and yoke are fastened by two studs. Said studs driven into body of intercylinder partition pass through holes in cover and yoke. Yoke presses lower side parts of intercylinder partition to cover by its projections. Reliable connection at side planes is provided. EFFECT: increased rigidity of main supports and crankcase as a whole, improved reliability of horizontal ties at crankcase-cover split. 2 dwg