Exhaust-gas analyzing device
US4814143A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 4, 1987 |
| Grant date | Mar 21, 1989 |
| Priority date | — |
| Expiry date | Aug 4, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/218
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In a low-pressure testing apparatus for analyzing gas exhausted from cars under a condition in which air pressure is low, an exhaust-gas analyzing device is provided with a dilution tunnel for diluting exhaust gas from cars with air which is under a decompressed condition, the exhaust-gas analyzer is connected to said dilution tunnel at a supply port side thereof and arranged in a low-pressure testing room, and an exhaust intake is open to the air outside of the low-pressure testing room via airtight piping. An influence caused by the fluctuation of pressure within the low-pressure testing room upon the accuracy of anaylsis can be eliminated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.