Electrically heated particulate filter enhanced ignition strategy
AssigneeGM Global Technology Operations LLC
InventorsEugene V. Gonze, Michael J. Paratore, JR.
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Abstract
An exhaust system that processes exhaust generated by an engine is provided. The system generally includes a particulate filter (PF) that filters particulates from the exhaust wherein an upstream end of the PF receives exhaust from the engine. A grid of electrically resistive material is applied to an exterior upstream surface of the PF and selectively heats exhaust passing through the grid to initiate combustion of particulates within the PF. A catalyst coating applied to at least one of the PF and the grid. A control module estimates a temperature of the grid and controls the engine to produce a desired exhaust product to increase the temperature of the grid.
Claims20
An exhaust system that processes exhaust generated by an engine, comprising:
- a particulate filter (PF) that filters particulates from the exhaust wherein an upstream end of the PF receives exhaust from the engine;
- a grid of electrically resistive material that is applied to an exterior upstream surface of the PF and that selectively heats exhaust passing through the grid to initiate combustion of particulates within the PF;
- a catalyst coating applied to at least one of the PF and the grid;
- and
- a control module that estimates a temperature of the grid and that controls the engine to produce a desired exhaust product to increase the temperature of the grid.
A method of regenerating a particulate filter (PF) of an exhaust system for an engine, comprising:
- applying a grid of electrically resistive material to a front exterior surface of the PF;
- applying a catalyst coating to at least one of the PF and the grid;
- estimating a temperature of the grid based on at least one of an exhaust composition and an exhaust temperature;
- and
- controlling the engine to produce a desired exhaust product to react with the catalyst coating to increase the estimated temperature of the grid.
Dependencies are inferred from the claim text.