Adaptive exhaust temperature estimation and control

Details Adaptive exhaust temperature estimation and control Adaptive exhaust temperature estimation and control

1996-12-13

1998-03-03

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

Methods

60276, 60289, 60297, 60301, 731181, F01N 320

Patent

active

057222363

ABSTRACT:
A method and apparatus for inferring and controlling the temperature of a NO.sub.x trap located downstream from a three-way catalyst that employs a temperature sensor to correct a temperature estimation model under relatively steady-state conditions to provide a more accurate estimate of NO.sub.x trap temperature and three-way catalyst temperature. In a second embodiment, the three-way catalyst also includes a temperature sensor for improving the instantaneous catalyst temperature estimation.

REFERENCES:
patent: 5388403 (1995-02-01), Nagami
patent: 5402641 (1995-04-01), Katoh et al.
patent: 5414994 (1995-05-01), Cullen et al.
patent: 5444977 (1995-08-01), Kawabata
patent: 5584176 (1996-12-01), Meyer
patent: 5606855 (1997-03-01), Tomisawa
patent: 5619852 (1997-04-01), Uchikawa

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