Estimation of In-Cylinder Pressure Using Spark Plug Discharge Current Measurements
Abstract
In cylinder pressure of spark ignition engines is correlated with several variables of the compression, injection, and ignition processes. Therefore, by monitoring the pressure of each cylinder we can improve the electronic engine supervision and control in terms of fast response and accuracy, thus enabling online diagnosis and overall efficiency improvement. However, the pressure measurement methods proposed until now have not been generally accepted at the production level due to their cost and/or complexity