A New Ignition Delay Formulation Applied to Predict Misfiring During Cold Starting of Diesel Engines

Abstract

<div class="htmlview paragraph">A new formulation is developed for the ignition delay (ID) in diesel engines to account for the effect of piston motion on the global autoignition reaction rates. A differentiation is made between the ID<sub>e</sub> measured in engines and ID<sub>v</sub>, measured in constant volume vessels. In addition, a method is presented to determine the coefficients of the ID<sub>e</sub> correlation from actual engine experimental data. The new formulation for ID<sub>e</sub> is applied to predict the misfiring cycles during the cold starting of diesel engines at different low ambient temperatures. The predictions are compared with experimental results obtained on a multi-cylinder heavy-duty diesel engine.</div>