Method for operating a drive unit and drive unit
US9494099B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 27, 2010 |
| Grant date | Nov 15, 2016 |
| Priority date | — |
| Expiry date | Oct 22, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The invention relates to a method for operating a drive unit, wherein the drive unit has an internal combustion engine, which is provided with at least one fuel pump, which is controlled and/or regulated by a pump control unit and which is intended for introducing fuel into a pressure accumulator; a metering system for introducing fuel, which has been metered by means of a lambda function unit, from the pressure accumulator into the internal combustion engine; and a pressure sensor for determining the pressure in the pressure accumulator; and wherein the output variables of the pump control unit and the lambda function unit are evaluated in order to determine a malfunction of the internal combustion engine. In this case, it is provided that additionally the pressure sensor is subjected to at least a defined test pressure for at least a short period of time and that the pressure that is measured with the pressure sensor is compared with the defined test pressure, in order to determine or rule out a malfunction of the pressure sensor. Furthermore, the invention relates to a drive unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.