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US 8,136,505 B2Granted
Method for controlling spark for particulate filter regenerating
AssigneeFord Global Technologies, LLC
InventorsHelmut Hans Ruhland, Moritz Klaus Springer, Thomas Lorenz, Georg Louven
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Abstract
A system for filtering and oxidizing particulate matter produced by a gasoline direct injection engine is disclosed. In one embodiment, engine spark is controlled such that soot held by a particulate filter may be oxidized even during low engine loads.
Claims18
A method for controlling a spark ignited engine having a particulate filter, comprising:
- retarding a spark angle at which spark is delivered to at least one cylinder of a spark ignited engine when an amount of soot held by a particulate filter exceeds a threshold and when engine load is less than a threshold level.
A method for controlling a spark ignited engine having a particulate filter, comprising:
- regenerating a particulate filter of a spark ignited engine;
- and
- adjusting at least spark timing of at least one cylinder of said spark ignited engine to regulate a temperature of said particulate filter above a threshold temperature.
A method for controlling a spark ignited engine having a particulate filter, comprising:
- regenerating a particulate filter of a spark ignited engine;
- adjusting at least spark timing of at least one cylinder of said spark ignited engine to regulate a temperature of said particulate filter above a threshold temperature;
- and
- advancing said at least spark timing of said at least one cylinder of said spark ignited engine in response to an increasing driver demand torque.
1 more element
Dependencies are inferred from the claim text.