Device for measuring exhaust flowrate using laminar flow element
US5837903A · kind A · utility
63Cited by
29References
33Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 22, 1995 |
| Grant date | Nov 17, 1998 |
| Priority date | — |
| Expiry date | Sep 22, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/48
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for determining the exhaust flowrate from an internal combustion engine (112) includes a laminar flowmeter (116). The flowmeter includes a capillary section (18) of ceramic material including an array of capillary tubes. Signals from a differential pressure sensor (128) which measures pressure loss across the capillary section as well as an absolute pressure sensor (126) and a temperature sensor (130) are input to a computer (134). The computer is programmed to calculate the flowrate of exhaust gas from the engine through its operating range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.