Abstract
Despite continuous progress in methods development, the crank angle resolved calculation of nitric oxide and soot emissions based on a 1- or multi-zone engine working cycle calculation is due to the modelling and calibration effort required, still rarely used as a standard method. Due to increasingly stringent legal regulations and the resulting technical developments, nitric oxides and soot emissions from modern diesel engines have been significantly reduced over recent years. In particular, the detailed analysis of this study underlines that the combustion of a modern diesel engine passes through individual phases that have a differing affect on the formation of pollutants. Additionally modern engines offer many degrees of freedom allowing the combustion process to be specifically affected by changing the engine control unit calibration. This complicates the crank angle based modelling of the emission components. The main focus of this work was to study the effects of modified combustion characteristics on pollutant formation, induced for example by a changed engine control unit calibration. It consists of a detailed analysis and sufficient replication with new extended crank angle resolved emission models. Models that have been used successfully in the past for engines with fewer degrees of freedom are often unsatisfactory when used for modern internal combustion engines. As a significant innovation, data-based methods were considered in addition to thermodynamic methods, especially in the system analysis and in the model development. Only through this combination of different tools is an analysis of relevant phenomena of pollutant formation viable. Additionally model improvements and simplifications are achieved with this combination.
| Translated title of the contribution | Grey-box modelling and analysis of the diesel engine working cycle and pollutant formation |
|---|---|
| Original language | German (Austria) |
| Publication status | Published - Feb 2015 |
Fields of science
- 206002 Electro-medical engineering
- 207109 Pollutant emission
- 202 Electrical Engineering, Electronics, Information Engineering
- 202027 Mechatronics
- 202034 Control engineering
- 203027 Internal combustion engines
- 206001 Biomedical engineering
JKU Focus areas
- Mechatronics and Information Processing