Electrically heated particulate filter zone-based post fuel injection system
AssigneeGM Global Technology Operations LLC
InventorsEugene V. Gonze, Michael J. Paratore, Jr.
Life of this patent
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Abstract
A system includes a particulate matter (PM) filter with multiple zones. An electrical heater includes heater segments that are associated with respective ones of the zones. The electrical heater is arranged upstream from and proximate with the PM filter. A post fuel injection system injects fuel into at least one of a cylinder of an engine and an exhaust system. A control module selects one of the zones, adjusts post fuel injection based on the selected one of the zones, and electrically heats the one of the zones via a respective one of the heater segments.
Claims20
A system comprising:
- a particulate matter (PM) filter that includes a plurality of zones;
- an electrical heater that includes a plurality of heater segments that are associated with respective ones of the plurality of zones,
- wherein the electrical heater is arranged upstream from and proximate with the PM filter;
- a post fuel injection system that injects fuel into at least one of a cylinder of an engine and an exhaust system;
- and
- a control module that selects one of the plurality of zones, adjusts post fuel injection based on the selected one of the plurality of zones, and electrically heats the one of the plurality of zones via a respective one of the plurality of heater segments.
A method comprising:
- providing a particulate matter (PM) filter that includes a plurality of zones;
- arranging an electrical heater, that includes a plurality of heater segments that are associated with respective ones of the plurality of zones, upstream from and proximate with the PM filter;
- injecting fuel into at least one of a cylinder of an engine and an exhaust system via a post fuel injection system;
- selecting one of the plurality of zones for regeneration;
- adjusting post fuel injection based on the selected one of the plurality of zones;
- and
- electrically heating the one of the plurality of zones via a respective one of the plurality of heater segments.
Dependencies are inferred from the claim text.