A Heat Release Model for Divided Chamber Diesel Engines

The rate of heat release in an indirect injection engine is modelled on the lines of the observed rate in a direct injection engine. The premixed burning is assumed to take place only in the prechamber. The diffusion burning was modelled to be proportional to the modelled rate of air entrainment and available fuel. The diffusion burning is stopped in the auxiliary chamber, once all the air in it is consumed. Comparison of experimental data with the results of simulation over a wide range of speed and load was encouraging. Different engine parameters were varied and their effects on engine performance are discussed.