Exhaust-gas mixer

US9957870B2 · kind B2 · utility

Assignee

• Tenneco GmbH · DE

Inventors

• Bertram Stelzer · Neustadt, DE
• Joachim Gehrlein · Rheinzabern, DE
• Andreas Lang · Ettringen, DE
• Michael Wolf · North Tonawanda, US
• Christoph Burg · Kandel, DE

Key dates

• Filing date: May 12, 2015
• Grant date: May 1, 2018
• Expiry date: May 12, 2035

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/12
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

An exhaust-gas mixing pipe for admixing additive into an exhaust-gas stream of a combustion engine. The housing wall has multiple rows, arranged over a circumference U, of openings through which gas can flow into the interior of the pipe, wherein the at least one opening of a row forms in each case one stage M characterized according to its size by the average opening cross section Q of the openings, wherein the sum of all the opening cross sections Q of all the openings of all the rows of the exhaust-gas mixing pipe is equal to SQ. In that context, at least one first-order stage M1, is provided, wherein stage M1 has openings having an average opening cross section Q1. At least one second-order stage M2, is provided, with openings having an average opening cross section Q2, where Q2>=f Q1, where 5<=f<=25.