System for checking filter of air cleaner for automobiles
US8574355B2 · kind B2 · utility
1Cited by
7References
7Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Nov 16, 2011 |
| Grant date | Nov 5, 2013 |
| Priority date | — |
| Expiry date | Feb 6, 2032 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M35/09
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A system recognizes a check-up time of a filter of an air cleaner. The system includes a power unit that supplies power to the system, a pressure sensor that measure pressure of a filter, at an outlet connected with a filter unit, a conversion circuit that converts the measured value into a predetermined type, a processor that controls the measurement period of the pressure sensor and receives and compare the measured value converted by the conversion circuit with a predetermined reference value, and a display unit that displays a filter replacement period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.