Oxygen sensor monitor
US4622844A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 22, 1985 |
| Grant date | Nov 18, 1986 |
| Priority date | — |
| Expiry date | Apr 22, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/4065
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A monitor (26) for use in a vehicle to check the operation of an oxygen sensor (20). The monitor (26) has a regulator (64) that changes the fluctuating voltage associated with a vehicle electrical system into a stable voltage source. An amplifier (68) receives an output signal from the oxygen sensor (20) and generates a buffered output signal. A comparator (70) compares the buffered output signal with a reference signal. When the buffered output signal is equal to the reference signal, the source voltage from the regulator (64) activates a diode (40) to inform an operator that the output voltage of the oxygen sensor (20) is within acceptable operating limits.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.