Oxygen sensor
US4650560A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 7, 1986 |
| Grant date | Mar 17, 1987 |
| Priority date | — |
| Expiry date | Jan 7, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/4067
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An oxygen sensor, suited for measuring the concentration of an oxygen gas contained in an exhaust gas of an automobile, comprises a cell and a heater which is mounted for heating the cell. The heater, including an electrically insulating substrate and a heating element embedded in the substrate, has a recess on one surface thereof and a pair of side wall portions formed by forming the recess. The cell comprises a solid-electrolyte body, a detection electrode, a reference electrode and a chamber enclosing the reference electrode except for its opening. The cell is disposed in the recess of the heater and joined to the heater with an intermediate layer being disposed between the cell and the heater and sintered. The intermediate layer has a number of fine cracks and an intermediate thermal expansion coefficient between these of the solid-electrolyte and the substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.