| 摘要 |
An oxygen sensor comprising an oxygen sensing unit sensitive to oxygen in an oxygen-containing gas and operative to produce an electric signal variable with the concentration of oxygen in the oxygen-containing gas when contacted by a stream of the gas, and a partitioned housing structure which has at least one first port open to the outside of the housing structure and which comprises partition means defining in the housing structure first and second chambers which are located across the partition means, the partition means being formed with at least one second port providing communication between the first and second chambers, the first chamber being open to the first port and the second chamber having enclosed the oxygen sensing unit therein. When such an oxygen sensor assembly is incorporated into the exhaust system of an internal combustion engine in which the exhaust gases normally involves pulsation of the gas pressure, the pulsating gas pressure of the exhaust gases allowed into the receptacle through the port therein can be dampened out before the gases reach the oxygen sensing unit and enables the sensing unit to detect the concentration of oxygen in the gases at practically constant, relatively low pressure levels.
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