On-vehicle evaluation of oil formulation
US8082776B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 26, 2009 |
| Grant date | Dec 27, 2011 |
| Priority date | — |
| Expiry date | Jun 9, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/2888
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
This invention is a method for determining the quality of lubrication oil added to a quantity of used oil in an operating engine or mechanism such as occurs during an oil change or when additional oil is added to maintain the vehicle manufacturer's specified total volume of oil. The method is based on identifying the electrical resistivity characteristics of the oil addition, representative of both the base oil formulation and its additive package, and, through comparison with previously-generated resistivity data on multiple oils identifying the oil addition. The added oil may then be compared with manufacturer specifications for the specific application to determine whether it meets recommended manufacturer requirements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.