Laser hardened pattern array in cylinder bores
US12241431B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 26, 2024 |
| Grant date | Mar 4, 2025 |
| Priority date | — |
| Expiry date | Feb 26, 2044 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02F2001/008
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An engine block for a vehicle includes a bore surface defining a cylinder bore. The bore surface exhibits a first microstructure and includes a pattern of a plurality of cycloidal features formed in the bore surface. The plurality of cycloidal features each exhibit a first length in a first axis and a second length in a second axis arranged 90 degrees from the first axis. The plurality of cycloidal features also exhibit a ratio of the first length to the second length in a range of 1:1.5 to 1.5:1. The plurality of cycloidal features further exhibit a second microstructure including tempered martensite, wherein the second microstructure is different from the first microstructure. The engine block is included in a vehicle. The cycloidal features are formed with a laser.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.