Patent · US Active

System for taking exhaust gas samples from internal combustion engines

US9952124B2 · kind B2 · utility

0Cited by

7References

16Claims

0Family size

Assignee

AVL Emissions Test Systems GmbH · DE

Inventors

Achim Dickow · Velbert, DE
Rainer Ballik · Moers, DE
Sascha Willich · Korschenbroich, DE

Key dates

Filing date	Mar 12, 2013
Grant date	Apr 24, 2018
Priority date	—
Expiry date	Nov 23, 2034

Classification

Technology area (CPC G)Physics
CPC primaryG01N2001/2255
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A system for taking exhaust gas samples from internal combustion engines includes an exhaust gas duct comprising an outflow cross section and an exhaust gas inlet. The exhaust gas duct communicates with an exhaust gas source via the exhaust gas inlet. An air duct takes in ambient air via a filter. The outflow cross section is concentric in the air duct. A mixing zone is arranged downstream of the outflow cross section. A dilution tunnel has an exhaust gas/air mixture flow therethrough. An annular orifice is arranged downstream of the outflow cross section in the dilution tunnel. A flow deflection device is arranged upstream of the annular orifice and downstream of the outflow cross section. The flow deflection device deflects the exhaust gas/air mixture so that it departs from a center axis of the dilution tunnel immediately downstream of the flow deflection device in an axially symmetrical manner.

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