Method and apparatus for calculating effective volume of...

Details Method and apparatus for calculating effective volume of... Method and apparatus for calculating effective volume of...

2008-11-25

2009-10-13

Lau, Tung S (Department: 2863)

Data processing: measuring, calibrating, or testing

Measurement system

Dimensional determination

C702S156000, C060S297000, C060S274000, C060S277000, C060S311000, C701S102000, C701S107000, C701S114000, C073S038000, C073S040000

Reexamination Certificate

active

07603252

ABSTRACT:
A method for calculating the effective volume of a diesel particulate filter invention may include: determining whether regeneration efficiency exists; determining, if regeneration efficiency exists, whether a learning condition of the ash coefficient is satisfied; detecting an exhaust flow amount Qexhif the learning condition of the ash coefficient is satisfied; calculating change of a pressure difference Δ(ΔPash(n)) caused by the ash; calculating change of an ash coefficient δ(a4) by using the change of the pressure difference Δ(ΔPash(n)) caused by the ash and the exhaust flow amount Qexh; calculating a current ash coefficient a4(n)by using the change of the ash coefficient δ(a4) and a previous ash coefficient a4(n-1); and calculating the effective volume Veby using the current ash coefficient a4(n)and a first filter coefficient a1.

REFERENCES:
patent: 6964694 (2005-11-01), Rauchfuss et al.
patent: 7065960 (2006-06-01), Gioannini et al.
patent: 7340887 (2008-03-01), Ante et al.

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