A vehicle system controls a compression ignition internal combustion engine equipped
with a supercharger system including a plurality of superchargers. The compression
ignition internal combustion engine has an exhaust gas recirculation (EGR) system.
The vehicle system determines a desired intake manifold supercharging state (tQac)
and a desired EGR rate (Megr). The vehicle system includes control logics, each
having a first input parameter and a second input parameter, for determining desired
set points (Rvnt1 & Rvnt2) for the plurality of superchargers, respectively.
The desired set points are used to control the plurality of superchargers, respectively.
The vehicle system also includes control logic for determining the first input
parameters in response to the desired intake manifold supercharging state. The
vehicle system further includes control logic for determining the second input
parameters in response to the desired EGR rate.
