Electically heated particulate filter incomplete regeneration identification system and method
AssigneeGM Global Technology Operations LLC
InventorsEugene V. Gonze, Michael J. Paratore, JR.
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Abstract
A system comprises a regeneration module and a diagnostic module. The regeneration module controls an electric heater to heat exhaust gas produced by an engine. The regeneration module determines when a regeneration cycle of a particulate matter (PM) filter begins by comparing a temperature of the exhaust gas input to the PM filter and a first temperature threshold. The diagnostic module determines a regeneration status by comparing a temperature of the exhaust gas output by the PM filter and a second temperature threshold during a predetermined period after the regeneration cycle begins.
Claims18
A system comprising:
- a regeneration module that controls an electric heater to heat exhaust gas produced by an engine and that determines when a regeneration cycle of a particulate matter (PM) filter begins by comparing a temperature of the exhaust gas input to the PM filter and a first temperature threshold;
- and
- a diagnostic module that determines a regeneration status by comparing a temperature of the exhaust gas output by the PM filter and a second temperature threshold during a predetermined period after the regeneration cycle begins.
A method comprising:
- controlling an electric heater to heat exhaust gas produced by an engine;
- determining when a regeneration cycle of a particulate matter (PM) filter begins by comparing a temperature of the exhaust gas input to the PM filter and a first temperature threshold;
- and
- determining a regeneration status by comparing a temperature of the exhaust gas output by the PM filter and a second temperature threshold during a predetermined period after the regeneration cycle begins.
Dependencies are inferred from the claim text.