公开(公告)号：US10989321B2

公开(公告)日：2021-04-27

申请号：US16395944

申请日：2019-04-26

申请人： Caterpillar Inc.

发明人： Ashwin A Hattiangadi ,  Rong Qu ,  Paul Smallidge ,  Karen Snelling ,  Pay Broderson

IPC分类号： F16K25/00 ,  F01L3/22 ,  F16K1/42

摘要： A valve seat insert for a gas exchange valve controlling gas exchange of a cylinder includes an insert body having an inner peripheral surface, an outer peripheral surface, and a valve seating surface structured to contact the gas exchange valve at a closed position and profiled to limit valve recession thereof. The valve seating surface includes an arrangement of linear segments and curved segments forming crowns to contact the gas exchange valve at different wear states. The valve seat insert further includes a base material, and a hard-facing material metallurgically bonded to the base material and forming the valve seating surface.

公开(公告)号：US20200340593A1

公开(公告)日：2020-10-29

申请号：US16395944

申请日：2019-04-26

申请人： Caterpillar Inc.

发明人： Ashwin A Hattiangadi ,  Rong Qu ,  Paul Smallidge ,  Karen Snelling ,  Pay Broderson

IPC分类号： F16K25/00 ,  F16K1/42 ,  F01L3/22

摘要： A valve seat insert for a gas exchange valve controlling gas exchange of a cylinder includes an insert body having an inner peripheral surface, an outer peripheral surface, and a valve seating surface structured to contact the gas exchange valve at a closed position and profiled to limit valve recession thereof. The valve seating surface includes an arrangement of linear segments and curved segments forming crowns to contact the gas exchange valve at different wear states. The valve seat insert further includes a base material, and a hard-facing material metallurgically bonded to the base material and forming the valve seating surface.