Exhaust gas temperature measuring system utilizing existing oxygen sensor
US5219228A · kind A · utility
15Cited by
7References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 11, 1992 |
| Grant date | Jun 15, 1993 |
| Priority date | — |
| Expiry date | May 11, 2012 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D41/1496
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An exhaust gas temperature measuring system for an internal combustion engine derives temperature from an oxygen sensor having a temperature dependent internal resistance disposed in an exhaust gas stream. The oxygen sensor produces an intrinsic voltage which is divided between the internal resistance and an external resistive load. An approximation of the oxygen sensor internal resistance is made from the value of the resistive load providing a value of the loaded sensor voltage having a predetermined relationship to the unloaded sensor voltage; and the internal resistance indicates the exhaust gas temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.