Patent ID: 8016989
Filing Date: 2011-09-13
Classification: G01N

Abstract:
1. An exhaust gas sensor for an exhaust system, the exhaust sensor comprising: a gas detection element configured to detect an amount of a substance in a gas, an outer housing including a sidewall and a bottom wall, the sidewall of the outer housing including a plurality of gas inlets arranged to provide fluid communication through the outer housing, the gas detection element positioned within the outer housing, a main fitting arranged to directly support a gas detection assembly including the gas detection element and the outer housing, and a protective cover arranged to cover and surround the outer housing, the protective cover comprising a side wall and a lower end, the lower end not substantially overlying the bottom wall of the outer housing and the side wall not comprising openings in proximity to the plurality of gas inlets but the gas inlets communicating with locations outside of the protective cover adjacent the bottom wall of the outer housing, the protective cover further comprising a cylindrical body with an inner periphery on which a plurality of protrusions are arranged circumferentially at substantially equal intervals, the plurality of protrusions being arranged to press-fit the protective cover onto the outer housing, some of the plurality of protrusions being disposed at a first portion of the protective cover and the remainder of the plurality of protrusions being disposed at a second portion of the protective cover, the first portion and the second portion of the protective cover being spaced apart from each other in an axial direction of the protective cover; wherein the protective cover is arranged to slide onto the outer housing such that an uppermost end of the protective cover is arranged below a lowermost end of the main fitting.