Method and device for determining the ambient pressure by means of a charge pressure sensor in a turbocharged engine
US7945371B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 25, 2007 |
| Grant date | May 17, 2011 |
| Priority date | — |
| Expiry date | Apr 11, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In turbocharged engines, there is the problem that, in particular under load, the ambient pressure (AMP) cannot be determined directly from the measurement values of a charge-pressure sensor (8). In order to avoid the installation of a further pressure sensor which is suitable for the detection of the ambient pressure (AMP), it is proposed that, during a negative load step of the internal combustion engine in which a switch takes place from supercharged engine operation into non-supercharged engine operation, the charge-pressure sensor (8) measures the transient profile of the charge pressure (PUT). A value for the ambient pressure (AMP) is determined from the transient profile of the charge pressure (PUT). Through the pressure value for the present ambient pressure (AMP), it is possible to optimize the engine operation for example when travelling up a slope.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.