System for taking exhaust gas samples from internal combustion engines

US8820138B2 · kind B2 · utility

Assignee

• AVL Emissions Test Systems GmbH · DE

Inventor

• Achim Dickow · Velbert, DE

Key dates

• Filing date: Mar 2, 2010
• Grant date: Sep 2, 2014
• Expiry date: Nov 17, 2030

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N2001/2264
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A system for taking an exhaust gas sample includes a first exhaust gas channel fluidically connected to a first exhaust gas source via a first exhaust gas inlet. A first air channel with a first air filter is configured to suck in ambient air. The first exhaust gas channel meets the first air channel in a first mixing zone, where a first exhaust gas is mixed with the ambient air to obtain a diluted exhaust gas/air mixture. A second exhaust gas channel is fluidically connected to a second exhaust gas source via a second exhaust gas inlet, and a second mixing zone. A control device and a measurement device are configured to respectively control and measure mass flows. The diluted exhaust gas/air mixture flows either from the first exhaust gas source or from the second exhaust gas source into the dilution tunnel and to at least one sampling probe.