Invention Grant
- Patent Title: Particulate matter retaining and purging system
- Patent Title (中): 颗粒物保留和清洗系统
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Application No.: US12370189Application Date: 2009-02-12
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Publication No.: US08388712B2Publication Date: 2013-03-05
- Inventor: Xiaogang Zhang , Paul Joseph Tennison
- Applicant: Xiaogang Zhang , Paul Joseph Tennison
- Applicant Address: US MI Dearborn
- Assignee: Ford Global Technologies, LLC
- Current Assignee: Ford Global Technologies, LLC
- Current Assignee Address: US MI Dearborn
- Agency: Alleman Hall McCoy Russell & Tuttle LLP
- Agent Julia Voutyras
- Main IPC: B01D41/00
- IPC: B01D41/00 ; B01D45/18 ; B01D46/04 ; F01N3/00 ; F01N5/04 ; F01N5/00 ; F02M25/06

Abstract:
Systems and methods are provided for operating a particulate matter retaining system having at least a first and a second filter, coupled to an engine intake. One example method comprises, during a first condition, operating in a first mode with the first filter storing particulate matter and the second filter releasing stored particulate matter. The method further comprises, operating in a second mode with the first filter releasing stored particulate matter and the second filter storing particulate matter, the exhaust gas flowing in an opposite direction as compared to the first mode. The method further comprises, operating in a third mode with both the first and the second filter storing particulate matter. During the modes, at least some tailpipe gas is drawn from between the first and second filters for expulsion to the atmosphere.
Public/Granted literature
- US20100199839A1 PARTICULATE MATTER RETAINING AND PURGING SYSTEM Public/Granted day:2010-08-12
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