Gm Global Technolgoy Operations, Inc.

Thomas E Godward

David N Hayden

Ibrahim Riba

In exemplary embodiments, methods, and systems for multivariable torque control of a vehicle are provided. The method includes configuring a processor disposed of in a multivariable controller to determine a set of references associated with Exhaust Gas Recirculation (EGR) by implementing an algorithm based on engine temperature and at least one reference associated with the EGR to generate commands for the control of a set of actuators; Optimizing at least one cam phase position by the control based on a generated command to apply an appropriate level of engine torque for vehicle propulsion; Restricting an allowable range of cam phases associated with operations of an EGR valve for a set of cams based on amounts of humidity and EGR introduced by the EGR valve during an internal combustion phase of vehicle operation; and providing an amount of propulsion torque by an engine in accordance with instructions provided by the processor.

Method and system for a multivariable engine control using cam phasing with a combined humidity and exhaust gas recirculation (EGR) dilution value to schedule restraints, and determine a reference EGR setpoint

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South Lyon, MI, United States of America

Thomas E Godward