Valve position sensor diagnostic
US5079946A · kind A · utility
24Cited by
6References
6Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Oct 25, 1990 |
| Grant date | Jan 14, 1992 |
| Priority date | — |
| Expiry date | Oct 25, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A throttle valve diagnostic apparatus monitors the integrity of a throttle valve position sensor in an internal combustion engine using an engine parameter indirectly related to the value position. If the absolute pressure of the air in the intake manifold associated with the throttle valve is less than a predetermined pressure for a predetermined amount of time while the position sensor indicates a valve position greater than a predetermined position, the valve position sensor is assumed to be faulty.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.