Fast response proportional sampling system and method for exhaust gas analysis
US7798020B2 · kind B2 · utility
0Cited by
7References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 21, 2005 |
| Grant date | Sep 21, 2010 |
| Priority date | — |
| Expiry date | Aug 31, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2001/2264
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for proportional sampling of particulate material present in the exhaust gas emitted from an engine, in order to measure the mass of particulate material present in the exhaust gas, utilizes a mixing chamber (18) for mixing a portion of the exhaust gas with a dilution gas. A flow control (20) controls the flow rate of the portion of the exhaust gas as a function of exhaust gas flow by activating individual ones of a parallel array of solenoid valves (30), each defining a flow restriction (34).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.