Method for tank venting in an internal combustion engine
US5988151A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 16, 1998 |
| Grant date | Nov 23, 1999 |
| Priority date | — |
| Expiry date | Jan 16, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D41/0032
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A Method for tank venting in an internal combustion engine includes ascertaining a degree of loading of an activated carbon filter. A desired flushing flow is calculated and a pulse duty factor for a tank venting valve is set depending on the level of the degree of loading and a predefined value for a maximum possible fuel mass flow through the tank venting valve. This is done as a function of the desired flushing flow, the temperature of a flushing stream and a pressure gradient at the tank venting valve, in such a way that the lambda deviation, brought about by a flushing procedure, of a lambda controller of the lambda control device, does not exceed a predefined maximum value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.