Engine oil viscosity diagnostic systems and methods
US7677086B2 · kind B2 · utility
9Cited by
1References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 12, 2007 |
| Grant date | Mar 16, 2010 |
| Priority date | — |
| Expiry date | Apr 19, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/2888
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An engine oil viscosity measurement system is provided. The system includes: a solenoid response module that determines an actual response time based on a position signal; an expected response module that determines an expected response time based on a system voltage and engine oil temperature; and a diagnostic module that diagnoses viscosity of the engine oil based on the actual response time and the expected response time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.