Model-based boost pressure control with system voltage disturbance rejection
Actuation systems for automotive boost control incorporate a vacuum tank and
PWM controlled vacuum valves to increase the boosting system flexibility. Physical models for
the actuator system are constructed using measurement data from a dynamometer with an
engine having a two stage turbo system. The actuator model is integrated in a complete Mean
Value Engine Model and a boost pressure controller is constructed. Based on the actuator model
a nonlinear compensator, capable of rejecting disturbances from system voltage, is developed.
A boost pressure controller is developed for the vacuum actuator and engine, using IMC. The
complete controller is evaluated in an engine test cell where its performance is quantified and
system voltage disturbance rejection is demonstrated.
Ivan Criscuolo, Oskar Leufven, Andreas Thomasson and Lars Eriksson
2011
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