Method for optimizing groove structure of friction plate of wet type friction engagement apparatus
US7234580B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 18, 2005 |
| Grant date | Jun 26, 2007 |
| Priority date | — |
| Expiry date | Oct 13, 2025 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D2069/004
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The object of the present invention is to provide an optimizing method for a groove structure of a friction disk of a wet-type friction engaging element, which can reduce drag torque by increasing outgoing flow of lubricating oil on the friction surface and increasing the content of air in the lubricating oil. The optimizing method for a groove structure of a friction disk of a wet-type friction engagement element comprising a sectoral inner section 12 of a groove 10 widening inwardly formed on the surface of a friction member of the wet-type friction engaging element, wherein the outgoing flow per groove area is calculated based on the entrance angle (opening angle) θ of the inner section 12 and the ratio h/w of the full length w of the groove 10 to the length h of the inner section; and then a range of the entrance angle (opening angle) θ of the inner section and the ratio h/w of the full length w of the groove to the length h of the inner section is determined where the outgoing flow per groove area is at least a certain value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.