Method and apparatus for detecting pneumatic pressure in an internal combustion engine
US4475381A · kind A · utility
10Cited by
4References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 22, 1981 |
| Grant date | Oct 9, 1984 |
| Priority date | — |
| Expiry date | Dec 22, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M15/09
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The absolute intake manifold pneumatic pressure and the atmospheric pressure are selectively detected by a single absolute pneumatic pressure sensor, and the relative intake manifold pneumatic pressure is calculated from the detected values. The detection of the atmospheric pressure by the sensor is carried out only when the engine is operated under a predetermined operating condition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.