Systems for regeneration of a gasoline particulate filter

Abstract

The invention discloses systems for regeneration of a gasoline particulate filter. A system includes a soot module, a coordinator module, a regeneration module, and actuator modules. The soot module determines a current amount of soot mass in a particulate filter of a gasoline engine, where the particulate filter is downstream from the gasoline engine and receives an exhaust gas from the gasoline engine. The coordinator module generates an enable signal, a torque reserve signal, and an equivalence ratio. The regeneration module, based on the current amount of soot mass and the enable signal, generates a regeneration signal to regenerate the particulate filter. The actuator modules, based on the regeneration signal, the torque reserve signal and the equivalence ratio, retard spark and increase an amount of air flow to the particulate filter. The actuators maintain a same amount of torque out of the gasoline engine during regeneration as output from the gasoline engine prior to the regeneration of the particulate filter.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of U.S. Provisional Application No. 62 / 073,546, filed October 31, 2014. The entire disclosures of the above-mentioned applications are incorporated herein by reference. technical field [0003] The present disclosure relates to the regeneration of particulate filters of motor gasoline (also known as gasoline) internal combustion engines. Background technique [0004] The background description provided herein is for the purpose of generally presenting the context of the disclosure. The work of the presently referenced inventors—to the extent described in this Background section—and aspects of that description that might not otherwise constitute prior art at the time of filing, neither express nor imply is admitted to be prior art for the present disclosure. [0005] Gasoline internal combustion engines (ICE) typically include an exhaust system with a catalytic converter. The exha...

AI Technical Summary

Problems solved by technology

Gasoline spark ignition engines may be less efficient at minimum combustion (i.e., minimum air and fuel levels) due to pumping losses and other factors

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