Methods and systems for exhaust-gas recirculation

An exhaust-gas recirculation arrangement, comprising:

• an intake passage comprising a barrier downstream of a throttle, wherein the barrier is biased relative to a central axis of the intake passage, wherein the barrier separates a first portion from a second portion;
• a low-pressure exhaust gas recirculation passage fluidly coupled to only the second portion, wherein the low-pressure exhaust gas recirculation passage comprises an exhaust gas recirculation valve;
• a flap arranged upstream of the low-pressure exhaust gas recirculation passage in the second portion relative to a direction of charge air flow;
• a compressor arranged directly downstream of the barrier;
• and
• a controller with computer-readable instructions stored on non-transitory memory thereof that when executed enable the controller to:
• adjust the exhaust gas recirculation valve to a fully closed position and the flap to a fully open position in response to an engine load being greater than a threshold load;
• adjust the exhaust gas recirculation valve to an open position and the flap to a fully closed position in response to the engine load not being greater than the threshold load and a low-pressure exhaust gas temperature being less than a lower threshold temperature;
• adjust the exhaust gas recirculation valve to an open position and the flap to a fully open position in response to the engine load not being greater than the threshold load and the low-pressure exhaust gas temperature being greater than an upper threshold temperature;
• and
• adjust the exhaust gas recirculation valve to an open position and the flap to a partially open position in response to the engine load not being greater than the threshold load and the low-pressure exhaust gas temperature being between the lower and upper threshold temperatures.