公开(公告)号：EP4317518A1

公开(公告)日：2024-02-07

申请号：EP22778975.7

申请日：2022-03-30

申请人： Weichai Power Co., Ltd.

发明人： MA, Fei ,  WANG, Ninglu ,  GUO, Lingyan ,  WAN, Shanhong ,  HUANG, Guolong ,  ZANG, Qiangzhen

IPC分类号： C23C4/073 ,  C23C4/11 ,  C23C4/02 ,  C23C4/18 ,  C23C24/04 ,  F02F3/12 ,  C23C4/129 ,  C23C4/134

摘要： Provided are a composite coating, a piston, an engine and a vehicle. The composite coating comprises a metal bonding layer, a transition layer, a ceramic layer and a sealing layer which are sequentially laminated, wherein the metal bonding layer is configured to be bonded with a piston basic body, the metal bonding layer is a rare earth metal modified bonding layer, and the transition layer is a rare earth metal modified zirconia layer; and the present invention is configured to solve the problem of a short service life of a piston due to a surface coating of the piston being prone to falling off.

公开(公告)号：EP4186993A1

公开(公告)日：2023-05-31

申请号：EP20946075.7

申请日：2020-12-07

申请人： Weichai Power Co., Ltd.

发明人： MA, Fei ,  HAN, Jinfeng ,  QI, Shaobao ,  GUO, Lingyan

IPC分类号： C23C28/00 ,  C23C14/16 ,  C23C14/35 ,  C25D11/26 ,  F02F3/12

摘要： A piston manufacturing method and a piston are provided. The piston manufacturing method includes: coating a top surface of a piston base (1) using a magnetron injection method, so as to form a metal layer (2), where the metal layer (2) is a composite metal layer (2) made of aluminum oxide and zirconium oxide; and carrying out an electrochemical reaction on the metal layer (2) using a micro-arc oxidation method, so as to form a ceramic layer (3), where the ceramic layer (3) has a porous structure.

公开(公告)号：EP4180647A1

公开(公告)日：2023-05-17

申请号：EP20944794.5

申请日：2020-12-07

申请人： Weichai Power Co., Ltd.

发明人： LI, Zhijie ,  QI, Shaobao ,  WANG, Shijie ,  MA, Fei ,  XIA, Yuan

IPC分类号： F02F3/00 ,  F02F3/10 ,  C25D7/04 ,  C25D15/00 ,  C25D3/02

摘要： Provided are a piston, a piston manufacturing device, and a piston manufacturing method. The piston includes a piston base (100), a porous function layer (101), a micropore filling layer (102), and a closing layer (103). The porous function layer (101) is disposed on a top surface of the piston base (100). The micropore filling layer (102) is disposed on a top surface of the porous function layer (101). The diameter of a pore in the micropore filling layer (102) is smaller than the diameter of a pore in the porous function layer (101). The closing layer (103) is disposed on a top surface of the micropore filling layer (102) and configured to partially block the pores in the micropore filling layer (102).