Systems and methods for transient control

A method for an engine, comprising:

• during a transition from a lower load to a higher load,
• deactivating operation of dedicated EGR to an engine intake;
• moving a throttle from a first throttle position based on the lower load to beyond a second throttle position based on the higher load before returning to the second throttle position, the second throttle position more open than the first throttle position;
• while moving the throttle, moving a wastegate from a first wastegate position based on the lower load to beyond a second wastegate position based on the higher load before returning to the second wastegate position, the second wastegate position more closed than the first wastegate position.

An engine system, comprising:

• an engine including a first and a second cylinder group;
• a turbine coupled to an exhaust passage;
• a wastegate coupled across the turbine;
• an EGR passage configured to recirculate exhaust from only the first cylinder group to an engine intake supplying aircharge to each of the first and second cylinder group;
• a valve coupled to the EGR passage for diverting at least a portion of the exhaust from the first cylinder group to the exhaust passage, upstream of the turbine;
• a throttle coupled to the engine intake for varying an amount of aircharge to the cylinder groups;
• a controller with computer-readable instructions stored on non-transitory memory for:
• in response to a transition from lower engine load to higher engine load,
• opening the valve to divert exhaust from the first cylinder group to upstream of the turbine;
• and
• during the transition,
• increasing throttle opening beyond a throttle opening corresponding to the higher load while decreasing wastegate opening beyond a wastegate opening corresponding to the higher load;
• and
• then holding the throttle and the wastegate at the increased and decreased opening for a duration before returning the throttle and the wastegate to the opening corresponding to the higher load.