Title:
APPARATUS, SYSTEM, AND METHOD FOR CATALYST PRESENCE DETECTION
Document Type and Number:
WIPO Patent Application WO/2011/072250
Kind Code:
A3
Abstract:
A system to detect the presence of a catalyst includes a catalyst housing (102), a first temperature sensing device (204), a second temperature sensing device (206), a flow rate measurement device (208), and a processing device (210). The first temperature sensing device measures a first temperature of exhaust gas upstream of the catalyst housing. The second temperature sensing device measures a second temperature of the exhaust gas downstream of the catalyst housing. The processing device estimates an expected time delay between the measured inlet and outlet exhaust gas temperatures corresponding to a system with a catalyst present. The processing device may also determine the presence of a catalyst by comparing the measured second temperature to the measured first temperature and comparing the measured second temperature to an estimated delayed first temperature associated with the expected time delay.
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Inventors:
LANA CARLOS (US)
QI BAOHUA (US)
QI BAOHUA (US)
Application Number:
PCT/US2010/059938
Publication Date:
September 29, 2011
Filing Date:
December 10, 2010
Export Citation:
Assignee:
CUMMINS IP INC (US)
LANA CARLOS (US)
QI BAOHUA (US)
LANA CARLOS (US)
QI BAOHUA (US)
International Classes:
F01N3/20; B01D53/94; F01N3/08; F01N9/00
Foreign References:
| US20040261374A1 | 2004-12-30 | |||
| US20080314133A1 | 2008-12-25 | |||
| US4969328A | 1990-11-13 | |||
| US20020069643A1 | 2002-06-13 |
Attorney, Agent or Firm:
MASSEY, Bryan J. et al. (Suite 600Salt Lake City, Utah, US)
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