Browse Publications Technical Papers 2019-01-1288

A framework for Model based Detection of Misfire in a Gasoline Engine with Dynamic Skip Fire 2019-01-1288

Taking advent of a more detailed control oriented engine model, a framework is proposed for model based detection of a misfire condition in a gasoline engine with dynamic skip fire. Model based techniques form the compact description of plant behavior and has a number of benefits. Along with conventional engine inputs, in the proposed framework ‘cylinder skip sequence’ is also fed to the engine model. In turn for a given cylinder skip pattern, the first principle based engine model precisely constructs the crankshaft angular speed fluctuation pattern. Construct of the crankshaft angular speed fluctuation pattern is shown for three cases, the conventional engine configuration, gasoline engine with dynamic skip fire and gasoline engine with dynamic skip fire having intermittent misfire condition. With the help of frequency domain components of the model output during different engine operational conditions, steady state and transient, simulation results are generated to show the efficacy of the proposed framework.


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