Sampling tube for improved exhaust gas flow to exhaust sensor

An exhaust assembly for a vehicle comprising:

• an exhaust pipe through which an exhaust gas flows, the exhaust pipe having a central axis and an inner wall surface, the exhaust pipe including an opening;
• a catalyst member disposed in the exhaust pipe;
• an oxygen sensor that is fixed relative to the exhaust pipe, the sensor being disposed adjacent the inner wall surface of the exhaust pipe, the oxygen sensor disposed downstream of the catalyst member;
• and
• a tube that is hollow and has a first end, a second end, and a chamber defined between the first end and the second end, the tube having a side wall defining at least part of the chamber, a wall that closes off the chamber near the second end, the first end being open to receive the sensor, the tube additionally including an inlet opening in the side wall spaced from the first end and an outlet opening in the side wall adjacent the first end, the inlet opening and the outlet opening being disposed on opposite sides of the tube axis, the tube extending through the opening in the exhaust pipe such that both the tube and the sensor extend into the exhaust pipe, the tube being fixed to the exhaust pipe to be disposed downstream from the catalyst member, the central axis of the exhaust pipe extending through the inlet opening, the tube directing flow of the exhaust gas into the inlet opening, toward the sensor, and out of the tube through the outlet opening,
• wherein the inlet opening a hole in the sidewall located the second end;
• and
• the outlet opening is a notch formed in the sidewall at the fist end.