Method of increasing the fatigue strength of crankshafts
US5009001A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 18, 1990 |
| Grant date | Apr 23, 1991 |
| Priority date | — |
| Expiry date | May 18, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49995
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of increasing the fatigue strength of crankshafts for reciprocating engines, especially internal combustion engines, is provided. When converting naturally aspirating production engines to supercharging to increase the power, the fatigue strength of the crankshaft quickly reaches a limit. Since for reasons of economy it is desirable not to alter the geometry of the crackshaft and to avoid expensive fine burnishing to increase the quality of the surface, and hence the fatigue strength associated therewith, the transition radius from the crankshaft pin to the crank web is inductively surface hardened, and at the same time the finish quality of the surface is reduced. The increased costs for the hardening are balanced by the reduced surface machining that is required.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.