Abstract
Zero-dimensional analysis with detailed kinetic mechanisms has been performed to elucidate the underlying chemistry of the Livengood-Wu integral which has been used to predict and analyze the knocking phenomena in spark ignition engines. Its predictive potential was ascribed to be the similarity between the concentration of the "pertinent reaction product (x)" in the original concept and the simulated logarithmic total concentration of hydroperoxides, log[total-OOH]. It was shown that the integral is a good indicator of ignition for periods before cool flames while the predictability significantly deteriorated for periods after cool flames.
