Intake gas sensor with vortex for internal combustion engine

摘要

A gas sensor includes a sensor housing and a sensing element located within the sensor housing. The sensing element defines an axis. The sensing element has a distal end extending from the sensor housing. The gas sensor further includes a sensor protection element coupled to the sensor housing and at least partially surrounding the distal end of the sensing element. The sensor protection element includes a tube having a conical portion, and a gas inlet located on the tube, the gas inlet spaced from the axis. The gas inlet is shaped to direct gas into the tube to induce a vortex gas flow within the conical portion of the tube.

主权项

1. A gas sensor comprising:
a sensor housing; a sensing element located within the sensor housing, the sensing element defining a first axis and having a distal end extending from the sensor housing; and a sensor protection element coupled to the sensor housing and at least partially surrounding the distal end of the sensing element, the sensor protection element including:
an outer tube having a first conical portion, the first conical portion having an inner surface, the outer tube further having a gas inlet, the gas inlet spaced from the first axis, the gas inlet shaped to direct gas into the outer tube to induce a vortex gas flow within the first conical portion of the outer tube, wherein the gas inlet is shaped as one of an outwardly facing scoop structure having an inner concave surface or an inwardly facing scoop structure having an outer concave surface, wherein the gas inlet is configured to direct gas into the first conical portion generally tangentially to the inner surface of the first conical portion, and wherein the outer tube further includes a first gas outlet; andan inner tube disposed within the outer tube, wherein the inner tube has a second conical portion that tapers in diameter along the first axis, such that the second conical portion has a diameter that decreases along a direction moving away from the sensing element along the first axis.