Flow sensor and fuel control system
US5795998A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 5, 1996 |
| Grant date | Aug 18, 1998 |
| Priority date | — |
| Expiry date | Dec 5, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/22
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Disclosed is a flow sensor comprising a cylinder and a piston movable within the cylinder and dividing the cylinder into first and second chambers. The first chamber communicates with an inlet and the cylinder has an orifice which cooperates with the piston to define an outlet from the first chamber. The area of the orifice varies with the position of the piston within the cylinder. The apparatus operates to vary the pressure in the second chamber so as to move the piston in response to fluid flow to maintain a substantially constant pressure drop between the inlet and outlet, each unique axial position of the piston within the cylinder indicating a particular flow rate. A transducer senses the position of the piston and thus the direction and rate of flow.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.