Methods and systems for providing transient torque response

An engine system comprising:

• a compression device including a compressor positioned in an intake passage;
• a first throttle positioned downstream of the compressor in the intake passage;
• a second throttle positioned upstream of the compressor in the intake passage;
• and
• a controller comprising a processor and computer-readable storage holding instructions executable by the processor to:
• during a transient condition, when a desired inlet manifold pressure is greater than a throttle inlet pressure of the first throttle, if a pressure drop across the second throttle is greater than a pressure threshold, open the second throttle to increase the first throttle inlet pressure.

A method comprising:

• during a transient condition, when a desired inlet manifold pressure is greater than a throttle inlet pressure of a first throttle,
• if a pressure drop across a second throttle that is positioned upstream from the first throttle in an intake passage is greater than a pressure threshold, opening the second throttle to increase the first throttle inlet pressure;
• if a volumetric efficiency is less than a threshold, adjusting a variable valve timing system to decrease an internal EGR trapping in cylinders of the engine;
• and
• if a LP-EGR flow delivered to the intake passage from a LP-EGR system is greater than an EGR threshold, reducing the LP-EGR flow.