Method and device for diagnosing a pop-off valve of a turbocharger
US8244501B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 2, 2009 |
| Grant date | Aug 14, 2012 |
| Priority date | — |
| Expiry date | Sep 16, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method for diagnosing an electrically controllable pop-off valve of a turbo-charging device of an internal combustion engine, which pop-off valve is situated in a pop-off pipe bypassing the compressor, includes: providing a reading regarding an air mass flow supplied by an air supply channel to the internal combustion engine; after the activation of the pop-off valve in order to switch over the pop-off valve, analyzing the time curve of the air mass flow reading in order to determine, within a specified time after the beginning of the activation of the pop-off valve, a local maximum of the air mass flow indicated by the air mass flow reading; and detecting a fault of the electrically controllable pop-off valve if the local maximum of the air mass flow is not able to be determined within the specified time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.