Method and apparatus for vehicle exhaust gas pollutant mass flow measurement
US6112575A · kind A · utility
14Cited by
6References
33Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 10, 1998 |
| Grant date | Sep 5, 2000 |
| Priority date | — |
| Expiry date | Apr 10, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M15/106
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus to provide a very compact and low power measurement of vehicular (automobile) exhaust emissions with results similar to those obtained with traditional CVS dynamometer lab emissions equipment. The sample dilution necessary for the analysis is performed by a computer controlled PWM valve as a function of measure exhaust mass flow, with the result that a "mini CVS" is accurately performed on a small fraction of the total exhaust flow.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.