System for measuring particulate discharge from vehicular internal combustion engine
US4361028A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Feb 19, 1981 |
| Grant date | Nov 30, 1982 |
| Priority date | — |
| Expiry date | Feb 19, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2001/2264
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system for measuring particulate discharge from a vehicular internal combustion engine has a dilution tunnel into which exhaust gases are introduced and mixed with and diluted by clean air. A part of the diluted gases is introduced through a sampling probe into a sampled gas line in which a filter is provided to collect particulates contained in the sampled gases. A differential pressure transducer is provided to detect the pressure drop across the filter and convert the detected pressure drop into an electric signal which is fed into an operator which is operative to compute the quantity of particulate content of the engine exhaust gases on the basis of the time differential of the electric signal from the differential pressure transducer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.