Air distribution system for reduction catalyst and oxidation catalyst

US4125997A · kind A · utility

Assignee

• Daimler-Benz AG · DE

Inventors

• Jorg Abthoff · Plüderhausen, DE
• Hans-Dieter Schuster · Schorndorf, DE
• Reiner Kreeb · Stuttgart, DE

Key dates

• Filing date: Jul 19, 1974
• Grant date: Nov 21, 1978
• Expiry date: Jul 19, 1994

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F01N13/009
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

An internal combustion engine with an exhaust line in which are arranged a reduction catalyst and downstream thereof an oxidation catalyst, whereby during the starting phase of the internal combustion engine, additional air is supplied to the reduction catalyst, and in the operationally warmed-up condition of the internal combustion engine, additional air is supplied to the oxidation catalyst while at the same time a part of the additional air continues to be fed to the reduction catalyst.