Tuning and Validation of an MVEM for a Turbocharged Gasoline Engine
One of the tools that is used when developing an engine control system
is the Mean Value Engine Model (MVEM). The thesis examines the
possibility of using an MVEM that originally was designed to model a
SAAB B235R engine to model the considerably different GM Ecotec LNF
engine.
Engine data was measured at Vehicular Systems laboratory and the
measurements were then used to tune the parameters of the MVEM's
submodels.
The majority of the components in the original MVEM could be tuned to
a good or acceptable performance without any modifications. The
submodels describing the port air mass flow, compressor air mass flow
and turbine efficiency would all benefit from being modified or
replaced, this was however only done for the turbine efficiency model,
leaving the improvements of the remaining two submodels as future
work.
Stefan Tuvesson
2009

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