公开(公告)号：EP2616565A1

公开(公告)日：2013-07-24

申请号：EP11755009.5

申请日：2011-08-30

申请人： Daimler AG

发明人： KAISER, Timotheus ,  PFEIFER, Hermann ,  REHM, Wolfgang ,  WEISSKOPF, Karl

IPC分类号： C22C38/00 ,  C22C38/04 ,  C22C38/26 ,  F02F3/00 ,  F02F3/02 ,  C22C38/06 ,  C22C38/18 ,  C22C38/34 ,  C22C38/46 ,  F16J1/01

CPC分类号： F02F3/00 ,  B21K1/18 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/40 ,  C22C38/58 ,  F02F3/0084 ,  F05C2201/0448 ,  F05C2251/042 ,  F16J1/01

摘要： The invention relates to a semifinished product blank, which is suitable for the production of a steel piston (1) for internal combustion engines having cylinder crankcases made of light metal alloys. Such a steel piston (1) comprises at least one upper piston part (4), which has a combustion recess (2) and an annular wall (3), and a lower piston part (4'), which has a piston skirt (5) and a connecting rod bearing (6). The semifinished product blank is suitable for providing the upper piston part (1) or the lower piston part (4) or both, as one piece or two pieces. The semifinished product blank is made of an austenitic steel that is stabilized with Ni, Mn, and N and that has a thermal expansion coefficient in a range of 16 to 21 x 10
-6 K
-1 . The invention further relates to a steel piston itself, which at least has a piston skirt (5) made of an austenitic steel that is stabilized with Ni, Mn, and N. Said piston skirt (5) has a thermal expansion coefficient in a range of 16 to 21 x 10
-6 K
-1 .

公开(公告)号：EP2640949B1

公开(公告)日：2017-11-08

申请号：EP11763594.6

申请日：2011-09-24

申请人： Daimler AG

发明人： KAISER, Timotheus ,  PFEIFER, Hermann ,  REHM, Wolfgang ,  WEISSKOPF, Karl

IPC分类号： F02F3/00 ,  F02F3/12 ,  F02F3/22 ,  F02F3/28 ,  B22D19/00

CPC分类号： F02F3/22 ,  B22D19/0027 ,  B23P15/10 ,  F02F3/003 ,  F02F3/12 ,  F02F3/285 ,  Y10T29/49258

公开(公告)号：EP2616565B1

公开(公告)日：2014-12-03

申请号：EP11755009.5

申请日：2011-08-30

申请人： Daimler AG

发明人： KAISER, Timotheus ,  PFEIFER, Hermann ,  REHM, Wolfgang ,  WEISSKOPF, Karl

IPC分类号： C22C38/00 ,  C22C38/04 ,  C22C38/26 ,  F02F3/00 ,  F02F3/02 ,  C22C38/06 ,  C22C38/18 ,  C22C38/34 ,  C22C38/46 ,  F16J1/01

CPC分类号： F02F3/00 ,  B21K1/18 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/40 ,  C22C38/58 ,  F02F3/0084 ,  F05C2201/0448 ,  F05C2251/042 ,  F16J1/01

公开(公告)号：EP2640949A1

公开(公告)日：2013-09-25

申请号：EP11763594.6

申请日：2011-09-24

申请人： Daimler AG

发明人： KAISER, Timotheus ,  PFEIFER, Hermann ,  REHM, Wolfgang ,  WEISSKOPF, Karl

IPC分类号： F02F3/00 ,  F02F3/12 ,  F02F3/22 ,  F02F3/28 ,  B22D19/00

CPC分类号： F02F3/22 ,  B22D19/0027 ,  B23P15/10 ,  F02F3/003 ,  F02F3/12 ,  F02F3/285 ,  Y10T29/49258

摘要： The present invention provides a cooling duct piston (1) for internal combustion engines. The cooling duct piston has a piston basic body (2) which is connected to a lining part (3) which faces towards an associated combustion chamber. Here, the lining part (3) forms the entirety of the piston surface (4), which faces towards the combustion chamber, of the cooling duct piston (1). An encircling depression (5) is provided in that surface of the piston basic body (2) which faces towards the combustion chamber, wherein the lining part (3) provides a fixed connection at least to that surface of the piston basic body (2) which faces towards the combustion chamber, and in so doing bridges the encircling depression (5), such that a cooling duct (6) is formed by the encircling depression (5) together with the lining part (3) which bridges said depression.

摘要翻译： 用于内燃机的冷却管道活塞（1）。 冷却管道活塞具有连接到面向分配的燃烧室的内衬部分（3）的活塞基体（2）。 这里，内衬部（3）完全形成面向燃烧室的冷却管道活塞（1）的活塞面（4）。 在面向燃烧室的活塞基体（2）的表面设有环绕凹部（5）。 衬里部分（3）至少与活塞基体（2）的面向燃烧室的表面提供永久性连接，从而桥接环绕的凹陷（5），使得环绕的凹陷（5）与衬里 桥接的部分（3）形成冷却管道（6）。