公开(公告)号：EP1448918B1

公开(公告)日：2006-12-06

申请号：EP02764411.1

申请日：2002-08-13

申请人： Mahle Metal Leve S.A.

发明人： TOMANIK, Antonio Eduardo Meirelles ,  ZABEU, Clayton, Barcelos ,  ALMEIDA, Germano, Moreira ,  LOPES, José Roberto

IPC分类号： F16J9/00 ,  F16J9/22 ,  F02F3/00

CPC分类号： F16J9/20 ,  F02F3/00 ,  F05C2251/042 ,  F16J9/22

摘要： A piston for an internal combustion engine of the type presenting circumferential grooves (10), each groove (10) housing a respective piston ring (20), at least one first upper groove (10) presenting a profile having upper and lower lateral walls (11, 12) radially outwardly inclined towards the piston top by an angle of inclination such as to compensate, at least partially, the deformations to which the piston is submitted when in a critical higher load operational condition, in order to maximize the distribution of the seating contact between at least one of the upper and lower lateral walls (21, 22) of the piston ring (20) and an adjacent lateral wall (11, 12) of the groove (10), as well as to minimize the wear that determines the useful life of the groove (10).

公开(公告)号：EP1448918A1

公开(公告)日：2004-08-25

申请号：EP02764411.1

申请日：2002-08-13

申请人： Mahle Metal Leve S.A.

发明人： TOMANIK, Antonio Eduardo Meirelles ,  ZABEU, Clayton, Barcelos ,  ALMEIDA, Germano, Moreira ,  LOPES, José Roberto

IPC分类号： F16J9/00 ,  F16J9/22 ,  F02F3/00

CPC分类号： F16J9/20 ,  F02F3/00 ,  F05C2251/042 ,  F16J9/22

摘要： A piston for an internal combustion engine of the type presenting circumferential grooves (10), each groove (10) housing a respective piston ring (20), at least one first upper groove (10) presenting a profile having upper and lower lateral walls (11, 12) radially outwardly inclined towards the piston top by an angle of inclination such as to compensate, at least partially, the deformations to which the piston is submitted when in a critical higher load operational condition, in order to maximize the distribution of the seating contact between at least one of the upper and lower lateral walls (21, 22) of the piston ring (20) and an adjacent lateral wall (11, 12) of the groove (10), as well as to minimize the wear that determines the useful life of the groove (10).