Measurement of automobile exhaust flow
US7343778B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | May 16, 2006 |
| Grant date | Mar 18, 2008 |
| Priority date | — |
| Expiry date | Jun 22, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M15/102
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of overcoming the problems of measuring the exhaust flow from a vehicle engine, which flow is pulsating and reversing, making it difficult to accurately measure. An amount of flow is added to the exhaust flow so that the combined amount of flow exceeds the reversals, and therefore the flow through the primary measuring device is raised a sufficient amount so that the measured flow of the exhaust is always positive. The source of the added flow can be by diverting some of the exhaust flow itself downstream from the measurement device and reintroducing it upstream of the measurement device. In the alternative, the added flow can be from a source external to the exhaust flow.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.