Gas separation: processes – With control responsive to sensed condition – Pressure sensed
Reexamination Certificate
2006-12-26
2006-12-26
Greene, Jason M. (Department: 1724)
Gas separation: processes
With control responsive to sensed condition
Pressure sensed
C095S019000, C095S273000, C095S278000, C055S282200, C055S282300, C055S385300, C055S523000, C055SDIG010, C055SDIG030, C096S421000, C060S274000, C060S311000
Reexamination Certificate
active
07153342
ABSTRACT:
An exhaust gas purifying system of a diesel engine comprises a PM filter installed in an exhaust passage line of the engine to collect particulate matter (PM) in the exhaust gas from the engine; a pressure difference sensor for detecting a pressure difference between upstream and downstream portions of the PM filter; a control unit which comprises a collected PM amount estimating section that estimates an amount of collected PM in the PM filter based on the pressure difference; and a reactivation timing judging section that, based on the estimated amount of the collected PM, judges a reactivation time when the reactivation of the PM filter is needed; and a reactivation carrying out system that, upon judgment of the reactivation time, carries out a predetermined operation to increases the temperature of the PM filter thereby to burn the collected PM. The control unit further comprises a dispersion condition judging section that judges a dispersion condition of the collected PM in the PM filter; and a correction section that corrects the estimated amount of the collected PM in accordance with the judged dispersion condition of the collected PM.
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Inoue Takao
Kawashima Jun-ichi
Koga Toshimasa
Kondou Terunori
Otake Makoto
Greene Jason M.
Nissan Motor Co,. Ltd.
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