Patent · US Active

Particulate filter system

US8387372B2 · kind B2 · utility

0Cited by

9References

9Claims

0Family size

Assignee

GM GLOBAL TECHNOLOGY OPERATIONS LLC · US

Inventors

Asim Tewari · Jamkhed, IN
Garima Bhatia · Bengaluru, IN

Key dates

Filing date	Mar 11, 2010
Grant date	Mar 5, 2013
Priority date	—
Expiry date	Jan 7, 2031

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF01N2240/20
WIPO fieldEnvironmental technology
WIPO sectorChemistry

Abstract

A device for filtering particulates from an exhaust gas feedstream of an internal combustion engine includes a filter substrate having a multiplicity of alternately closed parallel flow passages having porous walls oriented parallel to a flow axis of the exhaust gas between an inlet and an outlet thereof, wherein subsets of the flow passages are associated with respective ones of a plurality of zones, a flow control valve to control flow of exhaust gas to each of the plurality of zones, a multi-zone heating element including a plurality of individually activated heating elements each corresponding to one of the plurality of zones.

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