Method and code for controlling actuator responsive to oil pressure using oil viscosity measure
US7107828B2 · kind B2 · utility
4Cited by
2References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 24, 2005 |
| Grant date | Sep 19, 2006 |
| Priority date | — |
| Expiry date | Feb 24, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N11/08
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and code for controlling the operation of a deactivatable valve lifter of an internal combustion engine includes determining an oil viscosity measure based upon an engine oil pressure achieved when the engine is operating at a warm engine idle operating condition; determining a minimum oil temperature for actuator operation based on a comparison of the oil viscosity measure with a stored value representing the oil's nominal viscosity; and enabling actuator operation when an instantaneous oil temperature is not less than the minimum oil temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.