Sensor for detecting oxygen concentration
US4127464A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 4, 1977 |
| Grant date | Nov 28, 1978 |
| Priority date | — |
| Expiry date | Jan 4, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/4078
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A sensor is provided for electrochemically detecting the oxygen concentration of exhaust gas from an internal combustion engine of a vehicle. The sensor has an oxygen ion-transferrable solid electrolyte partition wall having catalyst electrodes on both sides in its housing, to thereby separate the housing into a reference gas contact compartment and an exhaust gas contact compartment in a hermetically isolated state between the two compartments. The reference gas contact compartment is sealed off from the surrounding atmosphere, but communicates with the atmosphere at a desired location in the vehicle only through an extended passage for introducing air as the reference gas into the reference gas contact compartment. The solid electrolyte partition wall is protected from splashing of water droplets, and consequently from quenching, ensuring an increased durability or life of the sensor without damage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.