Proportional exhaust sampler system and control means
US4660408A · kind A · utility
29Cited by
9References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 24, 1985 |
| Grant date | Apr 28, 1987 |
| Priority date | — |
| Expiry date | Oct 24, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2001/2264
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A testing apparatus for measuring the particulate and/or gaseous content of an exhaust source for use in evaluating the exhaust emissions of internal combustion engine provides both fixed flow and proportional flow control of the diluted particulate containing sample. The sample is diluted with carefully metered, clean dry air by means of one or more hybrid electrical-fluid control circuits for remarkably improved response time and accuracy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.