Static pressure tube apparatus, method, and system

An exhaust gas static pressure measurement system for an internal combustion engine, the system comprising:

• an exhaust gas housing configured to accommodate the flow of exhaust gases from an internal combustion engine;
• an elongate static pressure measurement tube disposed through a side of the housing at a connection point, the measurement tube having first and second ends, the measurement tube extending into the interior of the housing such that the first end is disposed in the interior of the housing;
• an opening disposed on the first end of the measurement tube, the opening configured to sample the exhaust gases, and a significant portion of the measurement tube being disposed between the opening and the housing;
• a static pressure sensor operatively connected to the second end of the measurement tube, the sensor configured to sense the static pressure of the exhaust gases.

An exhaust gas static pressure measurement system, the system comprising:

• an exhaust gas housing configured to accommodate the flow of exhaust gases;
• an elongate static pressure measurement tube disposed through a side of the housing at a connection point, the measurement tube having first and second ends, the measurement tube extending into the interior of the housing such that the first end is disposed in the interior of the housing;
• an opening disposed on the first end of the measurement tube, the opening configured to sample the exhaust gases, and a significant portion of the measurement tube being disposed between the opening and the housing;
• a static pressure sensor operatively connected to the second end of the measurement tube, the sensor configured to sense the static pressure of the gases;
• and
• a catalytic device disposed upstream of the measurement tube and a particulate filter disposed downstream of the measurement tube.