Particulate matter concentration measuring apparatus
US8056405B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jan 27, 2010 |
| Grant date | Nov 15, 2011 |
| Priority date | — |
| Expiry date | Jun 5, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01N2560/08
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A particulate matter concentration measuring apparatus configured to measure concentration of particulate matter in exhaust gas passing through an exhaust line includes an exhaust gas collecting line branched from the exhaust line, a particulate matter detection filter provided in the exhaust gas collecting line, a differential pressure sensor configured to sense differential pressure between an inlet and an outlet of the particulate matter detection filter, a passage wall disposed so that the exhaust gas flows to a downstream side of the particulate matter detection filter, an inlet side passage through which the exhaust gas flows into the particulate matter detection filter in the passage wall, and an outlet side passage through which the exhaust gas flows out from the particulate matter detection filter. The outlet side passage has an outlet side cross-sectional area approximately 1.0 times or more larger than an inlet side cross-sectional area of the inlet side passage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.