![]() ![]() The equations of one dimensional compressible flow in pipes are solved by using the Courant, Isaacson and Rees (CIR) method, and a short description of the boundary conditions is also given. The gas properties are dependent on temperature and chemical composition of the gas, which are evaluated at each crank-angle. The gas-wall heat transfer calculations are based on Annand heat transfer model for ICE. The combustion is modeled as a single zone model, with the fuel burning rate described by Wiebe functions. The engine model has been fully implemented in the Matlab-Simulink environment: a zero-dimensional submodel is used for modeling the cylinder and exhaust manifold thermodynamics, while a one-dimensional model is used for the intake system, in order to take into account the wave action phenomena. For a single cylinder engine running at relatively high engine speeds, the amount of air trapped into the cylinder strongly depends on intake pressure wave effects: it is essential, therefore, the development of a model that has the ability to resolve the wave-action phenomena, if successful simulation of the VVT system effects is to be performed. One of the objectives of this work is to study the effects of a Variable Valve Timing (VVT) system on the behavior of a single-cylinder, four-stroke engine installed on a motor scooter. This paper describes the development of a control-oriented model that allows the simulation of the Internal Combustion Engine (ICE) thermodynamics, including pressure wave effects. Development of a Control-Oriented Engine Model Including Wave Action Effects ![]()
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February 2023
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