Regeneration strategy for engine exhaust
AssigneeCaterpillar Inc.
InventorsMatthew Edward Leustek, Vadiraj Prakash Kulkarni, Sylvain Joseph Charbonnel
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Abstract
A method of regenerating a particulate filter of an exhaust system of an engine system is disclosed. The method may include determining a condition indicative of an accumulation of hydrocarbons in the particulate filter, and monitoring the particulate filter to determine when to initiate regeneration of the particulate filter. The method may also include selecting a regeneration profile for regeneration of the particulate filter based on the determined condition, and regenerating the particulate filter in accordance with the regeneration profile.
Claims16
A method of regenerating a particulate filter of an exhaust system of an engine system, comprising:
- determining a condition indicative of an accumulation of hydrocarbons in the particulate filter;
- monitoring the particulate filter to determine when to initiate regeneration of the particulate filter;
- selecting a hold time at a first temperature based on the determined condition;
- selecting a regeneration profile for regeneration of the particulate filter based on the determined condition;
- and
- regenerating the particulate filter in accordance with the regeneration profile wherein determining the condition includes determining whether at least one of the following events have occurred:
- a burner of the exhaust system upstream of the particulate filter fails to ignite, a flame in the burner gets extinguished, a cumulative crank time of an engine of the engine system exceeds a preselected value, a servicing of the engine system, and a fault event of the engine system;
- and wherein determining the condition further includes determining a number of events that occurred, duration, or type of the events that occurred.
An exhaust system of an engine system, comprising:
- a particulate filter configured to remove particulate matter from an exhaust flow of the engine system;
- a heating system configured to increase the temperature of the particulate filter for regeneration;
- and
- a controller configured to identify the occurrence of the following events:
- a burner of the exhaust system upstream of the particulate filter fails to ignite, a flame in the burner gets extinguished, a cumulative crank time of an engine of the engine system exceeds a preselected value, a servicing of the engine system, and a fault event of the engine system, and select a regeneration profile for regeneration of the particulate filter based on the identified events.
A method of regenerating a particulate filter positioned in an exhaust flow of an engine system, comprising:
- monitoring the particulate filter to determine when to initiate regeneration of the particulate filter;
- selecting a hold time at a first temperature based on an estimated accumulation of hydrocarbons in the particulate filter;
- and
- regenerating the particulate filter using a temperature profile that includes the hold time at the first temperature prior to an oxidation of particulate matter at a second temperature higher than the first temperature;
- wherein selecting a hold time includes determining whether one or more of the following events have occurred:
- a burner of the exhaust system upstream of the particulate filter fails to ignite, a flame in the burner gets extinguished, a cumulative crank time of an engine of the engine system exceeds a preselected value, a servicing of the engine system, and a fault event of the engine system;
- and wherein selecting a hold time further includes determining a number of events that occurred, duration, or type of the events that occurred.
Dependencies are inferred from the claim text.