Modelling the Intake Manifold Dynamics in a Diesel Engine
The goal is to model the intake manifold dynamics in a
turbocharged diesel engine. Pressure and temperature are the central
properties that are modeled and all models are physically based. The
models are implemented and simulated in
Simulink as part of a model representing a complete engine, namely the
Mercedes-Benz OM611, a 2.2 liter four cylinder
turbocharged diesel engine. A research car with this engine and an
extensive measurement system is used to collect measurements needed
for validation of the intake manifold models.
Three intake manifold models are presented and validated. All of them
agree well with measurement data under the condition that exhaust gas
recirculation is not active. When it is active however errors
occurs, this is thought to be because of erroneous modelling of the
EGR system.
Intake manifold models can be used for control and diagnosis purposes.
This has become very important in recent years since tough legislations
about lowering exhaust emissions, and detecting various faults has
been made.
Fredrik Karlsson
2001

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