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The equation found on page 994 contains errors and is corrected in the erratum.

This paper describes a quasi-dimensional multi-zone model of the CFR engine. The engine cylinder was divided into multiple zones containing the unburned air-fuel mixture, which experienced different temperature-pressure histories during the compression stroke and flame propagation phases of the engine cycle. This allowed for the simulation of a temperature gradient within the cylinder, which is postulated to be the cause of the Cascading Autoignition characteristic of the CFR engine. A Wiebe function description of the flame front propagation was used to describe the normal combustion process; mass and energy were transferred proportionally from the unburned zones to a single burned zone. A Functional Global Autoignition Model (FGAM) was used to describe the autoignition chemistry in each of the unburned zones and an equilibrium approach was used to determine the composition of the burned zone.