Patent · US Active

Exhaust gas sample taking system

US11402302B2 · kind B2 · utility

0Cited by

2References

9Claims

0Family size

Assignee

AVL Emissions Test Systems GmbH · DE

Inventors

Sascha Willich · Korschenbroich, DE
Marcus Wolff · Hamburg, DE

Key dates

Filing date	Sep 21, 2018
Grant date	Aug 2, 2022
Priority date	—
Expiry date	Mar 30, 2039

Classification

Technology area (CPC G)Physics
CPC primaryG01N2001/244
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

An exhaust gas sampling system includes a main conveying line, a main throughput pump which conveys a sample gas in the main conveying line, a first Venturi nozzle, a second Venturi nozzle, a first control valve, and a second control valve. The first Venturi nozzle and the second Venturi nozzle are connected in parallel and are arranged in the main conveying line upstream of the main throughput pump. The first Venturi nozzle is assigned the first control valve. The second Venturi nozzle is assigned the second control valve. Each of the first control valve and the second control valve are provided as a pinch valve. Each pinch valve has a flexible, hose-like control element and a pressure chamber which is filled with a fluid and which is arranged to surround the flexible, hose-like control element.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.