On-board diagnostic test of oxygen sensor
US5801295A · kind A · utility
10Cited by
3References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 27, 1997 |
| Grant date | Sep 1, 1998 |
| Priority date | — |
| Expiry date | May 27, 2017 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D41/1495
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An on-board diagnostic test for an exhaust gas oxygen sensor includes sensing the output of the oxygen sensor and summing the output over a specified period to determine the length of the trace of the sensor voltage versus time. Such length over a given time period indicates the activity of the sensor. This data is compared to a threshold to determine if the exhaust gas oxygen sensor meets certain performance requirements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.