Catalyst component of a motor vehicle exhaust gas cleaning system and use of a catalyst component

US9737852B2 · kind B2 · utility

Assignee

• Daimler AG · DE

Inventors

• Alexander Massner · Eßlingen, DE
• Inderpal Singh · Livonia, US
• Frank Zimmermann · Stuttgart, DE

Key dates

• Filing date: Jan 29, 2013
• Grant date: Aug 22, 2017
• Expiry date: Jan 29, 2033

Classification

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

Abstract

A motor vehicle emission control system includes a three zone catalytic converter component having a honeycomb support body with catalytically active coating having a precious metal content applied on the channel walls. The first coating zone extends in the longitudinal direction from the inlet-side end to a first coating boundary and has a first precious metal content. The second coating zone extends in the longitudinal direction from the first coating boundary to a second coating boundary situated downstream from the first coating boundary and has a second precious metal content that is lower than the first precious metal content. The third coating zone extends from the second coating boundary to the outlet-side end and has a third precious metal content that is lower than the second precious metal content. The coating has oxidation catalyst activity and is free of rhodium.