Method for NOx reduction of externally-ignited, explosion,...

Details Method for NOx reduction of externally-ignited, explosion,... Method for NOx reduction of externally-ignited, explosion,...

2005-08-23

2005-08-23

Tran, Binh Q. (Department: 3748)

Power plants

Internal combustion engine with treatment or handling of...

Methods

C060S285000, C060S297000, C123S305000, C123S406140, C123S406170, C123S406260, C123S406270, C123S406410

Reexamination Certificate

active

06931836

ABSTRACT:
In a method for reducing NOxin the exhaust gas of an externally ignited, explosion-type internal combustion engine that is operated at a lean fuel/air ratio of λ>1 and has a motor control device for controlling λ, the λ value is slidingly controlled as a function of an average mass temperature in the combustion chamber of the externally ignited, explosion-type internal combustion engine, wherein for a low average mass temperature λ is decreased and for a high average mass temperature λ is increased such that the internal combustion engine is operated in any operational state close to the misfiring limit, and thereby, with the most minimal NOxemission possible.

REFERENCES:
patent: RE34234 (1993-04-01), Kuroiwa et al.
patent: 5732554 (1998-03-01), Sasaki et al.
patent: 5775099 (1998-07-01), Ito et al.
patent: 5797367 (1998-08-01), Iida et al.
patent: 5839275 (1998-11-01), Hirota et al.

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