Method for detecting fuel discharge from the oil
US9778142B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 10, 2013 |
| Grant date | Oct 3, 2017 |
| Priority date | — |
| Expiry date | Jul 3, 2034 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2250/11
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method is provided for detecting fuel discharge from a lubricant in a housing of an internal combustion engine. A first lambda deviation is measured by a lambda sensor for a first mass air flow supplied in an intake tract of the engine. A second lambda deviation is measured by the lambda sensor for a second mass air flow that differs from the first mass air flow, and is supplied in an intake tract of the engine. An actual comparative value is calculated from the measured first and second lambda deviations. A desired comparative value indicative of the fuel discharge is calculated from a first desired lambda deviation for the first mass air flow, and a second desired lambda deviation is calculated for the second mass air flow. The fuel discharge is detected based on a comparison of the actual comparative value and the desired comparative value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.