Publications:Robust tuning of Individual Cylinders AFR in SI Engines with the Ion Current
From ISLAB/CAISR
| Title | Robust tuning of Individual Cylinders AFR in SI Engines with the Ion Current |
|---|---|
| Author | Nicholas Wickström and Stefan Byttner and Ulf Holmberg |
| Year | 2005 |
| PublicationType | Journal Paper |
| Journal | SAE Transactions |
| HostPublication | |
| Conference | SAE World Congress & exhibition 2005 |
| DOI | http://dx.doi.org/10.4271/2005-01-0020 |
| Diva url | http://hh.diva-portal.org/smash/record.jsf?searchId=1&pid=diva2:404648 |
| Abstract | A method for robust tuning of individual cylinders air-fuel ratio is proposed. The fuel injection is adjusted so that each cylinder has the same air-fuel ratio in inner control loops, and the resulting air-fuel ratio in the exhaust pipe is controlled with an exhaust gas oxygen sensor (EGO) in an outer control loop to achieve stoichiometric air-fuel ratio. Correction factors to provide cylinder individual fuel injection timing are calculated based on measurements of the ion currents for the individual cylinders. An implementation in a production vehicle is shown with results from driving on the highway. |
