Some insights into diesel locomotives misfires for the application of an OBD system

The paper presents the overview of diesel locomotives which are using in Poland with the description of their technical parameters and the influence of a misfire phenomenon for the ecological parameters. We take into consideration the subject of on-board diagnostic of compression-ignition engines (diesel engines) from the future norms point of view and show the directions of the changes in European regulations in the area of compression-ignition engines emission, what confirms the necessity of continuous inspection of misfires. The paper presents the different methods of misfire detection which can be applied in the compression-ignition engine, both the methods used in present produced engines and being in the experiment phase also. We present each of this method showing it failure, virtues and difficulties in practical implementation for diesel locomotive engines.