Valve seat insert for internal combustion engine profiled to resist valve recession
US10731523B2 · kind B2 · utility
25Cited by
6References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 13, 2018 |
| Grant date | Aug 4, 2020 |
| Priority date | — |
| Expiry date | Nov 13, 2038 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K25/04
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.