Method for determining air filter condition
US8573040B2 · kind B2 · utility
7Cited by
6References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 23, 2009 |
| Grant date | Nov 5, 2013 |
| Priority date | — |
| Expiry date | Mar 7, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2200/703
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A sensor that is designed for determining ambient pressure for purposes of derating an internal combustion engine at high altitudes, is used to determine the condition of the air filter by taking pressure measurements in the intake manifold before and after the engine is started, with the difference then being an indication of the condition of the air filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.