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Modeling the internal combustion engineA flexible and computationally economical model of the internal combustion engine was developed for use on large digital computer systems. It is based on a system of ordinary differential equations for cylinder-averaged properties. The computer program is capable of multicycle calculations, with some parameters varying from cycle to cycle, and has restart capabilities. It can accommodate a broad spectrum of reactants, permits changes in physical properties, and offers a wide selection of alternative modeling functions without any reprogramming. It readily adapts to the amount of information available in a particular case because the model is in fact a hierarchy of five models. The models range from a simple model requiring only thermodynamic properties to a complex model demanding full combustion kinetics, transport properties, and poppet valve flow characteristics. Among its many features the model includes heat transfer, valve timing, supercharging, motoring, finite burning rates, cycle-to-cycle variations in air-fuel ratio, humid air, residual and recirculated exhaust gas, and full combustion kinetics.
Document ID
19850011423
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Reference Publication (RP)
Authors
Zeleznik, F. J. (NASA Lewis Research Center Cleveland, OH, United States)
Mcbride, B. J. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 5, 2013
Publication Date
March 1, 1985
Subject Category
Numerical Analysis
Report/Patent Number
E-996
NASA-RP-1094
NAS 1.61:1094
Accession Number
85N19733
Funding Number(s)
PROJECT: RTOP 505-32-72
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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