Attenuation of engine harshness during lean-to-rich transitions

Details Attenuation of engine harshness during lean-to-rich transitions Attenuation of engine harshness during lean-to-rich transitions

2007-11-06

2007-11-06

Vo, Hieu T. (Department: 3747)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

With indicator or control of power plant

C060S274000

Reexamination Certificate

active

11672580

ABSTRACT:
Engine systems and methods for accomplishing regeneration of a NOx adsorber (28) using in-cylinder post-injection in a way that creates a lean-rich transition (FIG.3) for regenerating the NOx adsorber while attenuating engine torque output fluctuations during the transition without the necessity of using torque sensing to attenuate the fluctuations.

REFERENCES:
patent: 6931837 (2005-08-01), Verkiel et al.
patent: 6990951 (2006-01-01), Liu et al.
patent: 7191591 (2007-03-01), Zhang et al.
patent: 101 35 954 (2002-03-01), None

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