Invention Grant
- Patent Title: Valve seat insert for internal combustion engine profiled to resist valve recession
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Application No.: US16188547Application Date: 2018-11-13
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Publication No.: US10731523B2Publication Date: 2020-08-04
- Inventor: Rong Qu , Ashwin Hattiangadi , Sanjay Kumar , Kevin D. Yoder
- Applicant: Caterpillar Inc.
- Applicant Address: US IL Peoria
- Assignee: Caterpillar Inc.
- Current Assignee: Caterpillar Inc.
- Current Assignee Address: US IL Peoria
- Agency: Brannon Sowers & Cracraft
- Main IPC: F01L3/04
- IPC: F01L3/04 ; F01L3/22 ; F02M21/02 ; F16K1/42 ; F16K25/04 ; F16K25/00

Abstract:
An internal combustion engine includes a valve seat insert within an engine housing, and a gas exchange valve. The valve seat insert has a compound valve seat with a valve recession-resistive profile formed by a leading radius contacted by the valve seat at an early wear state of the valve head and valve seat insert, a trailing radius contacted by the valve head at a later wear state of the valve head and valve seat insert, and an outer seat face. The compound valve seat is shaped and proportioned to cushion contact by a gas exchange valve and retard valve recession.
Public/Granted literature
- US20200149440A1 VALVE SEAT INSERT FOR INTERNAL COMBUSTION ENGINE PROFILED TO RESIST VALVE RECESSION Public/Granted day:2020-05-14
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