Attenuation of engine harshness during lean-to rich transitions

Power plants – Internal combustion engine with treatment or handling of... – By means producing a chemical reaction of a component of the...

Reexamination Certificate

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C060S274000, C060S276000, C060S285000, C060S301000

Reexamination Certificate

active

10702889

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: 6173571 (2001-01-01), Kaneko et al.
patent: 6276130 (2001-08-01), Ito et al.
patent: 6640775 (2003-11-01), Itoyama et al.
patent: 6687598 (2004-02-01), Oota et al.
patent: 6701244 (2004-03-01), Oota et al.
patent: 6993901 (2006-02-01), Shirakawa

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