Patent · US Active

Pressure-balanced, catalyzed soot filter

US7722829B2 · kind B2 · utility

45Cited by

5References

21Claims

0Family size

Assignee

BASF CATALYSTS LLC · US

Inventors

Alfred Punke · Walle, DE
Torsten Mueller · Zirndorf, DE
Michel Deeba · East Brunswick Township, US
Kenneth E. Voss · Iselin, US
John J. Steger · Pittstown, US
Yiu Lui · Sayreville, US

Key dates

Filing date	Sep 2, 2005
Grant date	May 25, 2010
Priority date	—
Expiry date	Nov 30, 2028

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF01N2510/06
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The invention provides a catalyzed soot filter formed on a wall flow substrate having internal walls coated with catalyst compositions. The soot filter maintains a homogeneous flow of the exhaust gases through the internal walls of the substrate along the length of the filter due to the coating design. Both the efficiency and the durability of the catalytic function are increased over conventionally designed catalyzed soot filters. The catalyzed soot filter provides an integrated function for simultaneously treating the gaseous components of the exhaust (e.g., CO and HC) and the particulate matter deposited in the filter.

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