Modelling of Volumetric Efficiency on a Diesel Engine with Variable Geometry Turbine
The objectives for this master's thesis are to develop a model of
volumetric efficiency for a diesel engine equipped with a Variable
Geometry Turbine, study other existing models and test the models
using real engine measurements. In this work measurements from two
different Scania diesel engines have been used to identify the
parameters in the models and also to validate the models.
Two models have partly been derived in this thesis and two other
existing models are presented. The four described models and a
fifth model have been implemented in Matlab and tested.
Measurements have been used for identifying the parameters in the
models and for validation.
Among the five validated models of volumetric efficiency, one
model called the Overlap and Residual Gas Model (ORM) is
suggested. The model shows very good results in the simulation and
the validation. Often the absolute model errors are in the same
order as the resolution in the equipment used to measure
volumetric efficiency in the engine lab. The suggested model has
captured the physical behavior of an engine equipped with Variable
Geometry Turbine, which no other model studied have done.
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Last updated: 2019-08-05