Oxygen sensor for detecting the oxygen content of an internal combustion engine exhaust gas system
US4377801A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 15, 1981 |
| Grant date | Mar 22, 1983 |
| Priority date | — |
| Expiry date | Oct 15, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/12
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An oxygen sensor (1) for detecting the oxygen content of an internal combustion engine exhaust gas system includes a generally cylindrical hollow insulator (3) having a first resistive element (17), preferably of titania, and a second resistive element (19) preferably of zirconia or chromia, adjacent the closed end (9) thereof, grooves (23) adjacent the open end (7) thereof, and an intermediate portion (11) having a shoulder (13), with electrically conductive film leads (29) passing over the surface of the insulator (3) between the resistive elements (17 and 19) and the grooves (23), with a dielectric coating (33) over the conductive film leads (29) in the area of a metal shell (31) to insulate the film leads (29) from the shell (31).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.