Patent ID: 8640679

Claim:
Method to control an exhaust gas recirculation and a manifold air pressure in an engine, the method comprising: monitoring parameters describing a desired engine state; determining an uncorrected exhaust gas recirculation command and an uncorrected manifold air pressure command based on the monitored parameters; utilizing a feed forward module to generate a feed forward exhaust gas recirculation command and a feed forward manifold air pressure command based upon the uncorrected exhaust gas recirculation command and the uncorrected manifold air pressure command; determining an exhaust gas recirculation error term from a comparison of the uncorrected exhaust gas recirculation command and an exhaust gas recirculation feedback term; determining a manifold air pressure error term from a comparison of the uncorrected manifold air pressure command with a manifold air pressure feedback term; utilizing a decoupling matrix within a multiple input and multiple output (MIMO) controller to determine a MIMO exhaust gas recirculation command and a MIMO manifold air pressure command, said decoupling matrix configured based upon a diagonally dominant model of the engine compensated by the exhaust gas recirculation error term and the manifold air pressure error term; generating an exhaust gas recirculation command based on combining the MIMO exhaust gas recirculation command with the feed forward exhaust gas recirculation command, wherein the feed forward exhaust gas recirculation command bypasses the MIMO controller; generating a manifold air pressure command based upon combining the MIMO manifold air pressure command with the feed forward manifold air pressure command, wherein the feed forward manifold air pressure command bypasses the MIMO controller; controlling the exhaust gas recirculation and the manifold air pressure based upon the determined exhaust gas recirculation command and the determined manifold air pressure command.