Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – With indicator or control of power plant
Reexamination Certificate
2007-07-03
2007-07-03
Kwon, John T. (Department: 3747)
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
With indicator or control of power plant
C123S434000, C123S480000, C701S104000
Reexamination Certificate
active
11182679
ABSTRACT:
A method for rapidly transitioning from a lean combustion mode to a rich combustion mode, such as often required for the regeneration of aftertreatment devices, is provided by abrupt intake air reduction and a concurrent abrupt increase in fuel injection quantity with accompanying retardation of fuel injection timing. The abrupt increase in fuel quantity is to a maximum value sufficient to immediately provide a defined initial rich air/fuel ratio for a coexistent oxygen concentration in the cylinder. The fuel quantity is then proportionally reduced from the maximum value to a target fuel quantity to maintain a target air/fuel ratio during the transition. Simultaneously, injection timing is abruptly retarded to a value sufficient to avoid torque increase as a result of the increased injected fuel. The injection timing is subsequently proportionally advanced from the abruptly retarded timing value when the target fuel quantity and air/fuel ratio values are achieved.
REFERENCES:
patent: 5732554 (1998-03-01), Sasaki et al.
patent: 5937639 (1999-08-01), Sasaki et al.
patent: 6230683 (2001-05-01), zur Loye et al.
patent: 6561158 (2003-05-01), Yoshida et al.
patent: 7159389 (2007-01-01), Miura
patent: 2002/0050265 (2002-05-01), Yoshida et al.
patent: 2002/0185109 (2002-12-01), Flynn et al.
patent: 2003/0015168 (2003-01-01), Yoshida et al.
patent: 2003/0200955 (2003-10-01), zur Loye et al.
patent: 2004/0069273 (2004-04-01), Visser et al.
Gunn & Lee , P.C.
Southwest Research Institute
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