Misfire Detection for Prechamber SI Engines using Ion-Sensing and Rotational Speed Measurements

摘要

A misfire detection study on a prechamber-equipped spark ignition gas combustion engine is presented. The study shows that the logarithm on the absolute-valued ion current can be linearly weighted in order to detect misfire over a broad load range with only one threshold. Results also show that a very low complexity misfire detector can achieve good performance when a linear weighting technique is applied to the squared rotational speed samples. The detection performance based on the combination of rotational speed and ionization measurements is also presented.