Abstract: An intake body, systems, and method for reducing acoustic resonance in pressure tap passages include determining and/or setting the length of the drilling tap passages to a value such that the natural frequency of each pressure tap passage is outside of or does not substantially overlap with operational frequency content of an air stream in the intake body. The intake body, systems and method reduce the possibility of exciting the natural acoustic frequencies of the pressure tap passages, and can lead to improved signal-to-noise ratio when detecting EGR flow using a delta-P measurement system.

Abstract: An intake body, systems. and method for reducing acoustic resonance in pressure tap passages include determining and/or setting the length of the drilling tap passages to a value such that the natural frequency of each pressure tap passage is outside of or does not substantially overlap with operational frequency content of an air stream in the intake body. The intake body, systems and method reduce the possibility of exciting the natural acoustic frequencies of the pressure tap passages, and can lead to improved signal-to-noise ratio when detecting EGR flow using a delta-P measurement system.

Abstract: Separation of an air compression supply port from exhaust gas recirculation (EGR) in internal combustion engines. In one aspect, an air intake connector includes an entry port for an EGR gas, and an air intake elbow is connected to the air intake connector, the elbow receiving air. The elbow includes a first passage for routing a first portion of the air to the air intake connector to be mixed with the EGR gas, and a second passage for routing a second portion of the air to the air intake connector and out an exit port to an air compressor. The second passage is attached to the elbow and extends through a bend in the elbow.

Abstract: An intake body, systems, and method for reducing acoustic resonance in pressure tap passages include determining and/or setting the length of the drilling tap passages to a value such that the natural frequency of each pressure tap passage is outside of or does not substantially overlap with operational frequency content of an air stream in the intake body. The intake body, systems and method reduce the possibility of exciting the natural acoustic frequencies of the pressure tap passages, and can lead to improved signal-to-noise ratio when detecting EGR flow using a delta-P measurement system.

Abstract: Separation of an air compression supply port from exhaust gas recirculation (EGR) in internal combustion engines. In one aspect, an air intake connector includes an entry port for an EGR gas, and an air intake elbow is connected to the air intake connector, the elbow receiving air. The elbow includes a first passage for routing a first portion of the air to the air intake connector to be mixed with the EGR gas, and a second passage for routing a second portion of the air to the air intake connector and out an exit port to an air compressor. The second passage is attached to the elbow and extends through a bend in the elbow.